CN118389805B - Metal pipe fitting heat treatment device - Google Patents
Metal pipe fitting heat treatment device Download PDFInfo
- Publication number
- CN118389805B CN118389805B CN202410865715.7A CN202410865715A CN118389805B CN 118389805 B CN118389805 B CN 118389805B CN 202410865715 A CN202410865715 A CN 202410865715A CN 118389805 B CN118389805 B CN 118389805B
- Authority
- CN
- China
- Prior art keywords
- heat treatment
- cylinder
- left end
- uniformly distributed
- metal pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 175
- 239000002184 metal Substances 0.000 title claims abstract description 146
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 146
- 230000005540 biological transmission Effects 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 22
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 18
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/14—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0012—Rolls; Roll arrangements
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0025—Supports; Baskets; Containers; Covers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention provides a heat treatment device for metal pipe fittings, which relates to the field of heat treatment of metal pipe fittings. The invention adopts a mode of carrying out heat treatment on a plurality of large metal corrugated pipes at one time, reduces the times of manual operation and the heat treatment time, reduces the energy consumption and the production cost, greatly improves the heat treatment efficiency of the large metal corrugated pipes, and can obtain the same heat treatment for the large metal corrugated pipes in the same batch, thereby ensuring the stability and the consistency of the quality of the large metal corrugated pipes after the heat treatment; the large-scale metal bellows of rotation cooperates the circumferentially pivoted heating roller, can make the heat transfer to each position of large-scale metal bellows evenly, improves the homogeneity of heat treatment, guarantees large-scale metal bellows's surface quality, and then improves heat treatment efficiency and quality.
Description
Technical Field
The invention relates to the field of heat treatment of metal pipe fittings, in particular to a heat treatment device for metal pipe fittings.
Background
The large metal corrugated pipe is a corrugated pipe made of metal materials, is a common metal pipe fitting, is mainly used for bearing the transportation and transfer of liquid or gas under high temperature and high pressure environments, is generally made of corrosion-resistant materials such as stainless steel, nickel alloy and the like, has the characteristics of high temperature resistance, pressure resistance, corrosion resistance and the like, and is widely applied to pipeline systems in the fields of petroleum, chemical industry, aerospace and the like. The large metal corrugated pipe is required to be subjected to heat treatment in use, wherein the heat treatment refers to a series of process operations such as heating the metal corrugated pipe to change the internal crystal structure and performance of the metal corrugated pipe, and the hardness, strength, toughness and other physical properties of the metal corrugated pipe are regulated by controlling parameters such as heating temperature, heat preservation time, cooling speed and the like, so that the metal corrugated pipe is suitable for different working environments and use requirements.
However, the following problems are present in the heat treatment of large metal bellows.
1. The large metal corrugated pipes are subjected to heat treatment one by one, the number of times and time of heat treatment operation are greatly increased under the condition that the number of the large metal corrugated pipes is large, the energy consumption and the production cost are high, the production efficiency is low, and the heat treatment quality of different large metal corrugated pipes is difficult to keep stable and consistent.
2. Because the large metal corrugated pipe has larger volume, heat generated in the heat treatment process is difficult to uniformly transfer to each part of the metal corrugated pipe, and the heat treatment uniformity is poor, the heat treatment effect is poor, and the surface quality of the large metal corrugated pipe is correspondingly reduced.
The invention provides a heat treatment device for a metal pipe fitting, which aims to solve the problems existing in the heat treatment process of a large-sized metal corrugated pipe.
Disclosure of Invention
The invention provides a metal pipe fitting heat treatment device, which comprises a base, wherein the upper end of the base is provided with a heat treatment unit, and the right side of the heat treatment unit is provided with a feeding unit; the feeding unit comprises a mounting circular plate arranged above the base, a limiting assembly which is uniformly distributed circumferentially is arranged at the left end of the mounting circular plate, and the limiting assembly comprises a limiting rod which is arranged at the left end of the mounting circular plate and uniformly distributed circumferentially; the heat treatment unit comprises a heat treatment cylinder fixedly arranged at the upper end of the base, a sealing component is arranged on the right side of the heat treatment cylinder, inner tensioning components which are uniformly distributed in the circumferential direction and correspond to the limiting components one by one are arranged on the inner wall of the left end of the heat treatment cylinder, the inner tensioning components are used for fixing the inside of the large metal corrugated pipe, a mounting ring is rotatably arranged at the left end of the heat treatment cylinder, a heating roller which is uniformly distributed in the circumferential direction and is positioned at the outer side of the inner tensioning components is arranged at the right end of the mounting ring, a supporting ring which is rotatably connected with the inner wall of the heat treatment cylinder is commonly arranged at the right end of the heating roller, and a rotating component for controlling the circumferential rotation of the heating roller and the autorotation of the large metal corrugated pipe is arranged at the left end of the heat treatment cylinder; the inner tensioning assembly comprises a fixed cylinder arranged on the inner wall of the left end of the heat treatment cylinder, push rods which are uniformly distributed in the circumferential direction are slidably arranged outside the fixed cylinder, one end, close to the horizontal axis of the fixed cylinder, of the push rods is gradually inclined towards the axis direction from left to right, an arc-shaped retaining plate is arranged at one end, far away from the fixed cylinder, of the push rods, circular truncated cone supporting rods which are uniformly distributed in the circumferential direction and are slidably connected with the push rods are arranged on the left side of the heat treatment cylinder, and the diameters of the circular truncated cone supporting rods are gradually reduced from left to right.
In one possible implementation mode, the left end of the fixed cylinder is provided with a connecting sleeve which is rotationally connected with the heat treatment cylinder and is used for being penetrated by a round table supporting rod in a sliding mode, the round table supporting rod is rotationally arranged at the right end of the same movable ring, the outer ring surface of the movable ring is provided with control plates which are vertically symmetrical, the control plates positioned below are in sliding connection with the base left and right, the right end of the control plate positioned above is connected with the pushing end of the air cylinder, and the air cylinder is fixedly arranged at the upper end of the heat treatment cylinder.
In a possible implementation mode, the rotating assembly comprises a transmission gear which is uniformly distributed in the circumferential direction, the left end of the connecting sleeve penetrates through the heat treatment cylinder and is fixedly connected with the transmission gear, a circular through hole for the round table supporting rod to slide and penetrate through is formed in the transmission gear, a gear ring which is uniformly meshed with the transmission gear which is uniformly distributed in the circumferential direction is rotatably mounted at the left end of the heat treatment cylinder, and a transmission belt wheel fixedly connected with the left end of the mounting ring is fixedly sleeved outside the gear ring.
In one possible implementation mode, the guide rail which is symmetrical around is installed to the base upper end, installs the electric skateboard jointly on the front and back guide rail, installs the movable seat of electric skateboard fixed connection at the right-hand member of plectane, and the driving pulley left side is provided with the control band pulley, is connected through belt transmission between driving pulley and the control band pulley, and the control band pulley left end is connected with the motor output shaft of installing in the base upper end.
In one possible implementation mode, the sealing assembly comprises a sealing door which is symmetrical in front-back and is in sliding connection with the right end of the heat treatment cylinder, the sealing door is arranged at the upper end of the base in a front-back sliding mode, a lower rack is arranged at the upper end of the sealing door which is positioned at the front side, an upper rack is arranged at the upper end of the sealing door which is positioned at the rear side through a vertical plate, a connecting gear is meshed between the upper rack and the lower rack, and the left end of the connecting gear is connected with an output shaft of a second motor which is arranged at the upper end of the heat treatment cylinder.
In a possible implementation mode, the outside of one side that is close to of the limiting rod on the same limiting component is provided with a side plate, the left end of the side plate is provided with an inclined section inclined towards the axial direction of the corresponding limiting rod, and a left-right uniformly arranged spring telescopic rod is connected between the side plate and the corresponding limiting rod.
In one possible implementation mode, balls which are uniformly distributed are arranged on one side, away from the corresponding limiting rod, of each side plate in a rolling connection mode.
In one possible implementation manner, auxiliary retaining plates are arranged outside the arc-shaped retaining plates, and uniformly distributed adjusting springs are connected between the auxiliary retaining plates and the arc-shaped retaining plates.
In one possible implementation mode, the push rod is far away from the end of the fixed cylinder and is provided with opening grooves inclined from left to right, and the round table support rod is externally provided with convex strips which are uniformly distributed in the circumferential direction and are in sliding fit with the corresponding opening grooves.
In one possible implementation mode, the center of the inner wall of the left end of the heat treatment cylinder is provided with a centering cylinder, and the center of the left end of the mounting circular plate is provided with a centering column in sliding fit with the centering cylinder.
The invention has the beneficial effects of.
1. According to the metal pipe fitting heat treatment device provided by the embodiment of the invention, the plurality of large metal corrugated pipes are sent into the heat treatment cylinder through the limiting assemblies which are uniformly distributed in the circumferential direction, and the plurality of large metal corrugated pipes are simultaneously fixed through the inner tensioning assemblies which are uniformly distributed in the circumferential direction, so that the feeding times can be reduced, the production efficiency is improved, the stability of the positions of the large metal corrugated pipes in the heat treatment process can be ensured, the problems of uneven heat treatment or deformation and the like caused by position change are avoided, and the heat treatment quality is ensured.
2. According to the heat treatment device for the metal pipe fitting, provided by the embodiment of the invention, a mode of carrying out heat treatment on a plurality of large metal corrugated pipes at one time is adopted, so that the number of manual operation times and the heat treatment time are reduced, the energy consumption and the production cost are reduced, the heat treatment efficiency of the large metal corrugated pipes is greatly improved, the large metal corrugated pipes in the same batch can be subjected to the same heat treatment, and the stability and the consistency of the quality of the large metal corrugated pipes after the heat treatment are further ensured.
3. According to the metal pipe fitting heat treatment device provided by the embodiment of the invention, the same driving source can realize the circumferential rotation of the heating roller, the large metal corrugated pipe in the heat treatment process can synchronously rotate, the rotating large metal corrugated pipe is matched with the circumferentially rotating heating roller, heat can be uniformly transferred to each part of the large metal corrugated pipe, the uniformity of heat treatment is improved, the surface quality of the large metal corrugated pipe is ensured, the heat treatment efficiency is further improved, in addition, the large metal corrugated pipe is easy to generate thermal deformation in the heat treatment process, but the rotating large metal corrugated pipe is less influenced by gravity, and further the risk of thermal deformation can be effectively reduced.
In addition to the technical problems, technical features constituting the technical solutions, and beneficial effects caused by the technical features of the technical solutions described above, other technical problems that can be solved by the heat treatment apparatus for metal pipe fittings provided in the embodiments of the present application, other technical features included in the technical solutions, and beneficial effects caused by the technical features are described in detail in the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic view of a left-view plane structure of the present invention.
Fig. 3 is a schematic perspective view of a rotary assembly according to the present invention.
Fig. 4 is a schematic perspective view of a loading unit according to the present invention.
Fig. 5 is a schematic perspective view of a limiting assembly according to the present invention.
Fig. 6 is a schematic perspective view of a heat treatment unit according to the present invention.
Fig. 7 is a schematic perspective view of a rotating assembly and a round table supporting rod according to the present invention.
Fig. 8 is a schematic perspective view of an internal tensioning assembly of the present invention.
In the figure: 1. a base; 2. a heat treatment unit; 21. a heat treatment cylinder; 211. a fixed cylinder; 212. a push rod; 213. an arc-shaped retaining plate; 214. a round table supporting rod; 215. a connecting sleeve; 216. a moving ring; 217. a control board; 218. a cylinder; 22. a mounting ring; 221. closing the door; 222. a lower rack; 223. a rack is arranged; 224. a connecting gear; 225. a motor II; 23. a heating roller; 231. a transmission gear; 232. a circular through hole; 233. a gear ring; 234. a transmission belt wheel; 235. a control pulley; 236. a belt; 237. a motor I; 24. a support ring; 241. an auxiliary retaining plate; 242. an adjusting spring; 243. an open groove; 244. a convex strip; 245. an alignment cylinder; 246. a positioning column; 3. a feeding unit; 31. mounting a circular plate; 32. a guide rail; 33. an electric skateboard; 34. a limit rod; 341. a side plate; 342. a spring telescoping rod; 343. a ball; 4. large metal bellows.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described below and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
Referring to fig. 1, a heat treatment device for metal pipe fittings comprises a base 1, wherein a heat treatment unit 2 is arranged at the upper end of the base 1, and a feeding unit 3 is arranged on the right side of the heat treatment unit 2.
Referring to fig. 1 and 4, the feeding unit 3 includes a mounting circular plate 31 disposed above the base 1, a front-rear symmetrical guide rail 32 is mounted at the upper end of the base 1, an electric sliding plate 33 is mounted on the front-rear guide rail 32, a moving seat fixedly connected with the electric sliding plate 33 is mounted at the right end of the mounting circular plate 31, a limiting assembly uniformly distributed circumferentially is disposed at the left end of the mounting circular plate 31, and the limiting assembly is used for circumferentially limiting the outside of the large metal corrugated pipe 4, and comprises a limiting rod 34 mounted at the left end of the mounting circular plate 31 and uniformly distributed circumferentially.
Referring to fig. 1, 6 and 7, the heat treatment unit 2 includes a heat treatment cylinder 21 fixedly mounted at an upper end of the base 1, a closing component for closing an opening at a right end of the heat treatment cylinder 21 is disposed at a right side of the heat treatment cylinder 21, inner tensioning components which are uniformly circumferentially distributed and are in one-to-one correspondence with the limiting components are disposed at an inner wall at a left end of the heat treatment cylinder 21, the inner tensioning components are used for internally fixing the large metal bellows 4, a mounting ring 22 is rotatably mounted at a left end of the heat treatment cylinder 21, a heating roller 23 which is uniformly circumferentially distributed and is located at an outer side of the inner tensioning components is mounted at a right end of the mounting ring 22, a supporting ring 24 which is rotatably connected with an inner wall of the heat treatment cylinder 21 is jointly mounted at a right end of the heating roller 23, and a rotating component for controlling the circumferential rotation of the heating roller 23 and the inner tensioning components and the rotation of the large metal bellows 4 is disposed at a left end of the heat treatment cylinder 21; the heat treatment cylinder 21 has a heat insulation function, and can effectively prevent heat conduction and dissipation, so that the stability of the internal temperature is maintained, and parts related to heat treatment have high temperature resistance and can maintain the stability of the structure and the performance under a high temperature environment.
Referring to fig. 1, 6, 7 and 8, the inner tensioning assembly includes a fixed cylinder 211 disposed on the inner wall of the left end of the heat treatment cylinder 21, a push rod 212 uniformly circumferentially disposed is slidably mounted on the outside of the fixed cylinder 211, one end of the push rod 212 close to the horizontal axis of the fixed cylinder 211 is gradually inclined from left to right toward the axis direction, an arc-shaped abutment plate 213 is mounted on one end of the push rod 212 far from the fixed cylinder 211, a round table abutment rod 214 uniformly circumferentially disposed and slidably connected with the push rod 212 is disposed on the left side of the heat treatment cylinder 21, and the diameter of the round table abutment rod 214 gradually decreases from left to right.
Referring to fig. 1, 2, 7 and 8, a connecting sleeve 215 rotatably connected to the heat treatment cylinder 21 and slidably penetrated by a round table support rod 214 is mounted at the left end of the fixed cylinder 211, the round table support rod 214 is rotatably mounted at the right end of the same moving ring 216, a control plate 217 symmetrical up and down is mounted on the outer ring surface of the moving ring 216, the control plate 217 positioned below is slidably connected to the base 1 left and right, the right end of the control plate 217 positioned above is connected to the pushing end of a cylinder 218, and the cylinder 218 is fixedly mounted at the upper end of the heat treatment cylinder 21.
The concrete work is as follows: the feeding unit 3 in the initial state is located at the rightmost end of the base 1, at this time, the large metal bellows 4 to be subjected to heat treatment can be placed at the left end of the installation circular plate 31 one by one through the existing hoisting equipment and manual cooperation, in the process, the large metal bellows 4 can be placed between the limiting rods 34 uniformly circumferentially arranged on the same limiting assembly, the right end of the large metal bellows 4 is abutted against the installation circular plate 31 until all the large metal bellows 4 are placed between the corresponding limiting rods 34, circumferential limiting is performed on the outer parts of the large metal bellows 4 through cooperation between the limiting rods 34, and therefore the large metal bellows 4 can be stably and rapidly fed into the heat treatment cylinder 21 at the same time for heat treatment.
Then the movable seat and the mounting circular plate 31 are driven by the electric sliding plate 33 to move leftwards along the guide rail 32, the limiting component drives the large metal corrugated pipe 4 to move leftwards synchronously, and the closing component is in an open state, so that the whole of the mounting circular plate 31, the limiting component and the large metal corrugated pipe 4 smoothly enters the heat treatment cylinder 21 until the whole of the mounting circular plate 31, the limiting component and the large metal corrugated pipe 4 moves into the heat treatment cylinder 21, the left end of the large metal corrugated pipe 4 is abutted against the inner wall of the left end of the heat treatment cylinder 21, and the large metal corrugated pipe 4 is just sleeved outside the corresponding inner tensioning component.
Then, the upper control board 217 can be driven to move rightwards by the air cylinder 218, the moving ring 216 and the lower control board 217 can synchronously move rightwards along the base 1, the moving ring 216 drives the round platform supporting rod 214 to pass through the connecting sleeve 215 and gradually move rightwards, the push rods 212 uniformly distributed circumferentially are gradually extruded in the right moving process of the round platform supporting rod 214, under the matching of the round platform supporting rod 214 and the push rods 212, the round platform supporting rod 214 moves rightwards while the arc-shaped supporting plate 213 drives the arc-shaped supporting plate 213 to move outwards along the fixed cylinder 211 until the arc-shaped supporting plate 213 abuts against the inner wall of the large metal corrugated pipe 4, the arc-shaped supporting plate 213 uniformly distributed circumferentially can be used for fixing the large metal corrugated pipe 4 internally so as to ensure the stability of the large metal corrugated pipe 4 in the subsequent heat treatment process, in addition, the fixing of the large metal corrugated pipe 4 is finished by the inner tensioning assembly uniformly distributed circumferentially by the moving ring 216, the round platform supporting rod 214 and the inner tensioning assembly, after the complete fixing of the large metal corrugated pipe 4, the moving seat and the installation 31 are driven by the electric sliding plate 33 to move rightwards along the fixed cylinder 211, the inner tensioning assembly of the large metal corrugated pipe 32, and the large metal corrugated pipe 4 is gradually removed from the large corrugated pipe 4, and the large metal corrugated pipe 4 is gradually and the influence on the large corrugated pipe 4 is removed from the inner position of the large corrugated pipe 4 by the large metal corrugated pipe 4 in the process by the inner tensioning assembly, and the inner metal corrugated pipe is removed by the inner metal corrugated pipe 4; the plurality of large metal bellows 4 are sent into the heat treatment cylinder 21 through the limiting components which are uniformly distributed in the circumferential direction, and the plurality of large metal bellows 4 are simultaneously fixed through the inner tensioning components which are uniformly distributed in the circumferential direction, so that the feeding times can be reduced, the production efficiency is improved, the position stability of the large metal bellows 4 in the heat treatment process can be ensured, the problems of uneven heat treatment or deformation and the like caused by position change are avoided, and the heat treatment quality is ensured.
Referring to fig. 1 and 2, the sealing assembly includes a sealing door 221 which is symmetrical in front and back and is slidably connected with the right end of the heat treatment cylinder 21, the sealing door 221 is slidably mounted on the upper end of the base 1, a lower rack 222 is mounted on the upper end of the sealing door 221 located on the front side, an upper rack 223 is mounted on the upper end of the sealing door 221 located on the rear side through a vertical plate, a connecting gear 224 is meshed between the upper rack 223 and the lower rack 222, and the left end of the connecting gear 224 is connected with an output shaft of a motor 225 mounted on the upper end of the heat treatment cylinder 21.
After the circular plate 31 to be installed and the limiting component are integrally reset, the connecting gear 224 is driven to rotate anticlockwise by the second motor 225, the connecting gear 224 drives the upper rack 223 and the lower rack 222 to move in opposite directions, the lower rack 222 and the upper rack 223 drive the front and rear sealing doors 221 to move in opposite directions along the base 1 until the front and rear sealing doors 221 are in conflict, the opening and closing of the left end of the heat treatment cylinder 21 can be controlled by utilizing the cooperation of the front and rear sealing doors 221, the heat treatment cylinder 21 in the working process is sealed, heat generated in the heat treatment process is ensured to be concentrated in the heat treatment cylinder 21, the heat treatment efficiency is improved, the feeding and discharging of the large metal corrugated pipe 4 in the heat treatment cylinder 21 are facilitated, the right end of the large metal corrugated pipe 4 in the heat treatment cylinder 21 can be interfered and limited, the left end and right end of the large metal corrugated pipe 4 are limited again under the cooperation of the inner wall of the left end of the heat treatment cylinder 21 and the sealing doors 221, and the heat treatment of the large metal corrugated pipe 4 can be ensured to be more stably subjected to heat treatment.
Referring to fig. 2,3 and 7, the rotating assembly includes a transmission gear 231 uniformly distributed circumferentially, the left end of the connecting sleeve 215 penetrates through the heat treatment cylinder 21 and is fixedly connected with the transmission gear 231, a circular through hole 232 for sliding penetration of the round table support rod 214 is formed in the transmission gear 231, a gear ring 233 engaged with the transmission gear 231 uniformly distributed circumferentially is rotatably mounted at the left end of the heat treatment cylinder 21, a transmission belt wheel 234 fixedly connected with the left end of the mounting ring 22 is fixedly sleeved outside the gear ring 233, a control belt wheel 235 is arranged at the left side of the transmission belt wheel 234, the transmission belt wheel 234 is in transmission connection with the control belt wheel 235 through a belt 236, and the left end of the control belt wheel 235 is connected with an output shaft of a first motor 237 mounted at the upper end of the base 1.
After the heat treatment cylinder 21 is sealed, the control belt pulley 235 is driven to rotate by the first motor 237, the control belt pulley 235 drives the driving belt pulley 234 to synchronously rotate through the belt 236, the driving belt pulley 234 rotates, the mounting ring 22 drives the heating roller 23 to synchronously and circumferentially and uniformly distributed large metal bellows 4 to circumferentially rotate along with the fixing drum 211, the supporting ring 24 synchronously rotates along the inner wall of the heat treatment cylinder 21 along with the heating roller 23 and the mounting ring 22, high heat is emitted in the rotating process of the heating roller 23, and then the large metal bellows 4 in the heat treatment cylinder 21 is subjected to heat treatment, meanwhile, the gear ring 233 synchronously rotates along with the driving belt pulley 234 and drives the driving gear 231 to synchronously rotate, the driving gear 231 drives the fixing drum 211 to integrally and synchronously rotate through the connecting sleeve 215, the fixing drum 211 drives the push rod 212 to integrally and synchronously rotate along with the arc-shaped retaining plate 213, the round table retaining rod 214 always keeps abutting against the state of the push rod 212 and synchronously rotates along with the fixing drum 211, the large metal bellows 4 at the moment synchronously rotates along with the fixing drum 211 under the matching of the arc-shaped retaining plate 213, the push rod 212 and the round table 22 uniformly rotates along with the fixing drum 214, the large metal bellows 23 uniformly and circumferentially and uniformly distributed in the circumferential direction along with the driving shaft of the driving gear ring 23 and the driving gear wheel 23, the large metal bellows 23 in the large metal bellows 4 in the circumferential direction can uniformly rotate along with the large metal bellows 23 in the circumferential direction along with the large metal bellows 4, the large metal bellows 4 in the large bellows 4, the large metal bellows 4 can uniformly and uniformly rotate along the large metal bellows 4 in the large bellows 4 through the circumferential direction in the rolling drum 23, the large bellows 4 can realize the heat treatment by the circumferential rotation, the heat treatment of the large bellows 4, the large bellows 4 can easily and the heat treatment type has the heat quality and the large metal bellows in the large bellows 4 and the large bellows and can easily rotate and the large bellows. But the large-scale metal bellows 4 of rotation receives the gravity influence less, and then effectively reduces the risk of thermal deformation, in addition, adopt once only to carrying out the mode of heat treatment simultaneously to many large-scale metal bellows 4, reduce manual operation number of times and heat treatment time, reduce energy consumption and manufacturing cost, improve the heat treatment efficiency of large-scale metal bellows 4 greatly, the large-scale metal bellows 4 of same batch can obtain the same heat treatment, and then guarantee the stability and the uniformity of large-scale metal bellows 4 quality after the heat treatment.
After the heating roller 23 works for a period of time, the heat treatment of the large metal corrugated tube 4 is gradually completed, after the heat treatment of the large metal corrugated tube 4 is completed, the first motor 237 stops working, the control belt pulley 235, the transmission belt pulley 234, the gear ring 233 and the transmission gear 231 synchronously stop rotating, the heating roller 23 stops rotating circumferentially and working, the inner tensioning assembly and the large metal corrugated tube 4 stop rotating, then the connecting gear 224 can be driven by the second motor 225 to rotate clockwise, the connecting gear 224 drives the upper rack 223 and the lower rack 222 to synchronously and reversely move, the lower rack 222 and the upper rack 223 respectively drive the front and rear sealing doors 221 to synchronously and reversely move along the base 1 until the left end of the heat treatment cylinder 21 is in an open state, the movable seat, the mounting circular plate 31 and the limiting assembly synchronously move rightward until the limiting assembly and the inner wall of the left end of the heat treatment cylinder 21 collide, and the large metal corrugated tube 4 is inserted between the limiting rods 34 which are uniformly distributed circumferentially at the moment again.
Then the cylinder 218 can push the upper control board 217 to move left for resetting, the movable ring 216 drives the lower control board 217 to move left for resetting synchronously along the base 1, the round platform support rod 214 moves left synchronously along the movable ring 216, the push rods 212 which are circumferentially and uniformly distributed gradually leave the round platform support rod 214, the round platform support rod 214 is always in sliding connection with the push rods 212, so that the push rods 212 can drive the arc-shaped support plates 213 to move along the fixed cylinder 211 in a direction away from the large metal corrugated pipes 4, finally the large metal corrugated pipes 4 are not abutted against the arc-shaped support plates 213, the unfixed large metal corrugated pipes 4 in the inside fall between the limit rods 34 again under the action of gravity, the limit rods 34 are subjected to circumferential limit again, then the electric sliding plate 33 can drive the movable seat, the mounting circular plate 31, the limit assemblies and the large metal corrugated pipes 4 subjected to heat treatment to right for resetting until the large metal corrugated pipes 4 are far away from the heat treatment cylinders 21, the large metal corrugated pipes 4 can be taken down from the limit rods 34 one by one, the large metal corrugated pipes 4 can be collected uniformly, the large metal corrugated pipes 4 can be cooled down in the same manner after the large metal corrugated pipes 4 are removed from the heat treatment cylinders, and the large metal corrugated pipes 4 can be cooled simultaneously.
Referring to fig. 5, a side plate 341 is disposed outside the side of the same limiting assembly, which is close to the limiting rod 34, the left end of the side plate 341 is provided with an inclined section inclined towards the axial direction of the corresponding limiting rod 34, a left-right uniformly arranged spring telescopic rod 342 is connected between the side plate 341 and the corresponding limiting rod 34, and a side, away from the corresponding limiting rod 34, of the side plate 341 is provided with uniformly arranged balls 343 in a rolling connection manner.
When placing large-scale metal bellows 4 on corresponding spacing subassembly one by one, large-scale metal bellows 4 is contradicted with the slope section of curb plate 341 left end at first, the slope section is favorable to large-scale metal bellows 4 better entering into between the curb plate 341 that circumference evenly arranges, along with large-scale metal bellows 4's right side moves, curb plate 341 compresses gradually spring telescopic link 342 and gradually be close to gag lever post 34, the curb plate 341 that circumference evenly arranges can carry out the adaptation conflict to large-scale metal bellows 4 outside under spring telescopic link 342's effect, not only increase the stability of large-scale metal bellows 4 of material loading in-process, still can guarantee that large-scale metal bellows 4 breaks away from curb plate 341 smoothly, in addition, move right or the in-process that moves left along curb plate 341 at large-scale metal bellows 4, through ball 343 and large-scale metal bellows 4 rolling contact, effectively reduce the frictional force of curb plate 341 and large-scale metal bellows 4, make large-scale metal bellows 4 smooth left side move or right, thereby improve large-scale metal bellows 4's material loading speed.
Referring to fig. 7 and 8, the arc-shaped retaining plates 213 are provided with auxiliary retaining plates 241 at the outer sides thereof, uniformly arranged adjusting springs 242 are connected between the auxiliary retaining plates 241 and the arc-shaped retaining plates 213, an opening groove 243 inclined from left to right is provided at one end of the push rod 212 away from the fixed cylinder 211, and a protruding strip 244 which is uniformly arranged in the circumferential direction and slidingly connected with the corresponding opening groove 243 is mounted at the outer side of the circular table retaining rod 214.
In the process of fixing the large metal corrugated pipe 4 by the inner tensioning assembly, the auxiliary retaining plate 241 can synchronously move along with the arc retaining plate 213 through the adjusting spring 242, meanwhile, the adjusting spring 242 can be compressed to tightly press against the inner wall of the large metal corrugated pipe 4, the auxiliary retaining plate 241 can be self-adaptively abutted against the inner wall of the large metal corrugated pipe 4 by utilizing the adjusting spring 242, gaps between the inner wall of the large metal corrugated pipe 4 and the arc retaining plate 213 are effectively compensated, so that the stability of the large metal corrugated pipe 4 is improved, in addition, when the round platform retaining rod 214 presses the push rods 212 which are uniformly distributed in the circumferential direction, the left and right movement of the round platform retaining rod 214 can be guided through the cooperation between the raised strips 244 and the opening grooves 243, the push rods 212 can be smoothly moved up and down along the fixed cylinder 211 along with the movement of the round platform retaining rod 214, and a stable whole body can be formed after the round platform retaining rod 214 is abutted against the push rods 212, and the round platform retaining rod 214 can smoothly rotate along with the round platform retaining rod 212.
Referring to fig. 4 and 6, an alignment cylinder 245 is installed at the center of the inner wall of the left end of the heat treatment cylinder 21, and an alignment column 246 slidably engaged with the alignment cylinder 245 is installed at the center of the left end of the installation circular plate 31.
In the process that the mounting circular plate 31 drives the large metal corrugated pipe 4 to move left to the inside of the heat treatment cylinder 21, the alignment column 246 is gradually in sliding butt joint with the alignment cylinder 245, the mounting circular plate 31 and the heat treatment cylinder 21 are guaranteed to be positioned on the same horizontal axis through the cooperation between the alignment column 246 and the alignment cylinder 245, the mounting circular plate 31, the limiting assembly and the large metal corrugated pipe 4 in the moving process are supported and guided, and the large metal corrugated pipe 4 can be smoothly and accurately sleeved outside the inner tensioning assembly.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, or slidably connected; the two components can be connected mechanically or electrically, or directly or indirectly through an intermediate medium, or can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle according to the present invention should be covered in the protection scope of the present invention.
Claims (10)
1. The utility model provides a metal pipe fitting heat treatment device, includes base (1), its characterized in that: the upper end of the base (1) is provided with a heat treatment unit (2), and the right side of the heat treatment unit (2) is provided with a feeding unit (3);
the feeding unit (3) comprises a mounting circular plate (31) arranged above the base (1), a limiting assembly which is uniformly distributed circumferentially is arranged at the left end of the mounting circular plate (31), and the limiting assembly comprises a limiting rod (34) which is arranged at the left end of the mounting circular plate (31) and uniformly distributed circumferentially;
The heat treatment unit (2) comprises a heat treatment cylinder (21) fixedly arranged at the upper end of the base (1), a sealing assembly is arranged on the right side of the heat treatment cylinder (21), inner tensioning assemblies which are circumferentially and uniformly distributed and correspond to the limiting assemblies one by one are arranged on the inner wall of the left end of the heat treatment cylinder (21), the inner tensioning assemblies are used for internally fixing the large metal corrugated pipes (4), a mounting ring (22) is rotatably arranged at the left end of the heat treatment cylinder (21), heating rollers (23) which are circumferentially and uniformly distributed and are positioned at the outer sides of the inner tensioning assemblies are arranged at the right end of the mounting ring (22), supporting rings (24) which are rotationally connected with the inner wall of the heat treatment cylinder (21) are jointly arranged at the right end of the heating rollers (23), and a rotating assembly which controls the circumferential rotation of the heating rollers (23) and the autorotation of the large metal corrugated pipes (4) is arranged at the left end of the heat treatment cylinder (21);
the inner tensioning assembly comprises a fixed cylinder (211) arranged on the inner wall of the left end of the heat treatment cylinder (21), a push rod (212) which is uniformly distributed in the circumferential direction is slidably arranged outside the fixed cylinder (211), one end, close to the horizontal axis of the fixed cylinder (211), of the push rod (212) is gradually inclined towards the axis direction from left to right, an arc-shaped abutting plate (213) is arranged at one end, far away from the fixed cylinder (211), of the push rod (212), a round table abutting rod (214) which is uniformly distributed in the circumferential direction and is slidably connected with the push rod (212) is arranged on the left side of the heat treatment cylinder (21), and the diameter of the round table abutting rod (214) is gradually reduced from left to right.
2. A metal pipe fitting heat treatment apparatus according to claim 1, wherein: the left end of the fixed cylinder (211) is provided with a connecting sleeve (215) which is rotationally connected with the heat treatment cylinder (21) and is used for being penetrated by a round platform supporting rod (214) in a sliding way, the round platform supporting rod (214) is rotationally arranged at the right end of the same movable ring (216), the outer ring surface of the movable ring (216) is provided with a control plate (217) which is vertically symmetrical, the control plate (217) which is arranged below is in left-right sliding connection with the base (1), the right end of the control plate (217) which is arranged above is connected with the pushing end of a cylinder (218), and the cylinder (218) is fixedly arranged at the upper end of the heat treatment cylinder (21).
3. A metal pipe fitting heat treatment apparatus according to claim 2, wherein: the rotary assembly comprises a transmission gear (231) which is circumferentially and uniformly distributed, the left end of a connecting sleeve (215) penetrates through a heat treatment cylinder (21) and then is fixedly connected with the transmission gear (231), a circular through hole (232) which is used for sliding and penetrating a round table supporting rod (214) is formed in the transmission gear (231), a gear ring (233) which is meshed with the transmission gear (231) which is circumferentially and uniformly distributed is rotatably mounted at the left end of the heat treatment cylinder (21), and a transmission belt wheel (234) fixedly connected with the left end of a mounting ring (22) is fixedly sleeved outside the gear ring (233).
4. A metal pipe fitting heat treatment apparatus according to claim 3, wherein: the electric scooter comprises a base (1), wherein a front guide rail (32) and a rear guide rail (32) are arranged at the upper end of the base, an electric skateboard (33) is jointly arranged on the front guide rail and the rear guide rail (32), a movable seat fixedly connected with the electric skateboard (33) is arranged at the right end of an installation circular plate (31), a control belt wheel (235) is arranged at the left side of a transmission belt wheel (234), the transmission belt wheel (234) is in transmission connection with the control belt wheel (235) through a belt (236), and the left end of the control belt wheel (235) is connected with an output shaft of a first motor (237) arranged at the upper end of the base (1).
5. A metal pipe fitting heat treatment apparatus according to claim 1, wherein: the sealing assembly comprises a sealing door (221) which is symmetrical from front to back and is in sliding connection with the right end of the heat treatment cylinder (21), the sealing door (221) is arranged at the upper end of the base (1) in a front-back sliding mode, a lower rack (222) is arranged at the upper end of the sealing door (221) which is positioned at the front side, an upper rack (223) is arranged at the upper end of the sealing door (221) which is positioned at the rear side through a vertical plate, a connecting gear (224) is meshed between the upper rack (223) and the lower rack (222), and the left end of the connecting gear (224) is connected with an output shaft of a second motor (225) which is arranged at the upper end of the heat treatment cylinder (21).
6. A metal pipe fitting heat treatment apparatus according to claim 1, wherein: the outside of one side that is close to of gag lever post (34) on the same spacing subassembly all is provided with curb plate (341), and the slope section to corresponding gag lever post (34) axis direction slope is installed to curb plate (341) left end, is connected with between curb plate (341) and corresponding gag lever post (34) about evenly arranging spring telescopic link (342).
7. A metal pipe fitting heat treatment apparatus according to claim 6, wherein: the side plates (341) are provided with uniformly distributed balls (343) on one side far away from the corresponding limiting rods (34) in a rolling connection mode.
8. A metal pipe fitting heat treatment apparatus according to claim 1, wherein: the arc-shaped retaining plates (213) are externally provided with auxiliary retaining plates (241), and uniformly distributed adjusting springs (242) are connected between the auxiliary retaining plates (241) and the arc-shaped retaining plates (213).
9. A metal pipe fitting heat treatment apparatus according to claim 1, wherein: open grooves (243) inclined from left to right are formed in one end, far away from the fixed cylinder (211), of the push rod (212), and convex strips (244) which are uniformly distributed in the circumferential direction and are in sliding fit with the corresponding open grooves (243) are arranged outside the round table supporting rod (214).
10. A metal pipe fitting heat treatment apparatus according to claim 1, wherein: the center of the inner wall of the left end of the heat treatment cylinder (21) is provided with a centering cylinder (245), and the center of the left end of the mounting circular plate (31) is provided with a centering column (246) which is in sliding fit with the centering cylinder (245).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202410865715.7A CN118389805B (en) | 2024-07-01 | 2024-07-01 | Metal pipe fitting heat treatment device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202410865715.7A CN118389805B (en) | 2024-07-01 | 2024-07-01 | Metal pipe fitting heat treatment device |
Publications (2)
Publication Number | Publication Date |
---|---|
CN118389805A CN118389805A (en) | 2024-07-26 |
CN118389805B true CN118389805B (en) | 2024-08-27 |
Family
ID=91985378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202410865715.7A Active CN118389805B (en) | 2024-07-01 | 2024-07-01 | Metal pipe fitting heat treatment device |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN118389805B (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115591870A (en) * | 2022-11-11 | 2023-01-13 | 陈文超(Cn) | Corrugated pipe forming equipment and forming method |
CN118180715A (en) * | 2024-04-01 | 2024-06-14 | 江苏科茂新材料科技有限公司 | Cold-rolled sheet welding production equipment |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111086355B (en) * | 2019-12-31 | 2021-07-23 | 浙江合众新能源汽车有限公司 | Simple auxiliary tool for assembling hubcap |
CN112296154B (en) * | 2020-09-09 | 2023-08-08 | 天津由鑫建筑材料制造有限公司 | Metal corrugated pipe forming machine and forming method using same |
CN117753592A (en) * | 2023-12-22 | 2024-03-26 | 江苏省埃迪机电设备实业有限公司 | Intelligent surface treatment equipment and method for corrugated pipe machining |
-
2024
- 2024-07-01 CN CN202410865715.7A patent/CN118389805B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115591870A (en) * | 2022-11-11 | 2023-01-13 | 陈文超(Cn) | Corrugated pipe forming equipment and forming method |
CN118180715A (en) * | 2024-04-01 | 2024-06-14 | 江苏科茂新材料科技有限公司 | Cold-rolled sheet welding production equipment |
Also Published As
Publication number | Publication date |
---|---|
CN118389805A (en) | 2024-07-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN201728492U (en) | Semi-automatic welding equipment for pipe made of sheet material | |
CN111266854B (en) | Automatic assembly equipment for heat exchange tube of marine heat exchanger | |
CN103736796B (en) | A kind of swan neck system | |
CN117047378A (en) | Welding equipment with locking clamp | |
CN118389805B (en) | Metal pipe fitting heat treatment device | |
CN102601196B (en) | Sheet metal part spinning forming equipment and forming method | |
CN116673367A (en) | Pipe bending machine for construction engineering | |
CN112620996B (en) | Iron and steel smelting boiler manufacturing process | |
CN114643304A (en) | Adjustable three-dimensional bending device and method for pipe fitting | |
CN112322859A (en) | Steel pipe quenching rear end fixture | |
CN114798965A (en) | Large-scale rag bolt automatic production device | |
CN118237840B (en) | Plastic-coated composite steel pipe processing welding equipment | |
CN213197079U (en) | Positioning device for polishing machine in steel pipe | |
KR20120005302U (en) | Steel tube fabrication apparatus | |
CN117123828B (en) | Auxiliary punching device for thin-wall stainless steel pipe | |
CN117686313A (en) | Intensity detection device for petrochemical machinery pipeline | |
CN116475635A (en) | Stainless steel pipe welding pipe fitting fast switching device | |
CN209754875U (en) | honing device | |
KR20110129058A (en) | Steel tube fabrication apparatus | |
CN221254654U (en) | Automatic heat treatment equipment for large-diameter bearing | |
CN221320035U (en) | Quenching equipment for tooth surface of powder metallurgy gear | |
CN217043149U (en) | Novel extrusion guiding device for water supply plastic-coated composite steel pipe | |
CN221918158U (en) | Vacuum heat treatment device for die steel | |
CN109332437B (en) | Hot bending device of small R value bending piece suitable for ultrahigh strength steel plate | |
CN117283229B (en) | Pipe fitting welding device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |