CN111923296A - Device and method for eliminating bending deformation of cylindrical core mold with large length-diameter ratio without energy consumption - Google Patents
Device and method for eliminating bending deformation of cylindrical core mold with large length-diameter ratio without energy consumption Download PDFInfo
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- CN111923296A CN111923296A CN202010695055.4A CN202010695055A CN111923296A CN 111923296 A CN111923296 A CN 111923296A CN 202010695055 A CN202010695055 A CN 202010695055A CN 111923296 A CN111923296 A CN 111923296A
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- 238000005452 bending Methods 0.000 title claims abstract description 45
- 238000005265 energy consumption Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000005291 magnetic effect Effects 0.000 claims description 21
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 9
- 239000003302 ferromagnetic material Substances 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005490 dry winding Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004046 wet winding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/76—Cores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a device and a method for eliminating bending deformation of a cylindrical core mould with a large length-diameter ratio without energy consumption, belonging to the technical field of core mould manufacturing; the device comprises a core mould main body and a straightness sensor, wherein an inner wall of the core mould main body is provided with an in-mould permanent magnet in a surrounding manner, and an external permanent magnet is arranged above and/or below the core mould main body; the straightness sensor is used for measuring the bending direction and degree of the core mold main body, the distance between the external permanent magnet and the core mold main body is adjustable, bending deformation is eliminated by changing the acting force of the external permanent magnet on the core mold main body, and the quality and the precision of a product wound by the core mold are improved.
Description
Technical Field
The invention belongs to the technical field of core mold manufacturing, and particularly relates to a device and a method for eliminating bending deformation of a cylindrical core mold with a large length-diameter ratio by zero energy consumption.
Background
Compared with the traditional processed products, the products manufactured by winding and forming the fibers have the characteristics of high strength, light weight, high reliability, stable product quality (the higher the core mold precision is, the higher the product quality is), low cost (on the same product, a plurality of materials can be reasonably selected and recombined to achieve the optimal technical and economic effects) and the like, and the core mold winding and forming method is adopted for various products such as pressure containers, missile launching tubes, airplane bodies and the like. According to the difference of physical and chemical states of resin matrix during fiber winding forming, the method is divided into dry winding, wet winding and semi-dry winding, wherein the wet winding horizontal core mold is most commonly applied. And some special long cylindrical products have large sizes and corresponding large core model sizes, so that the structural rigidity is difficult to ensure. At present, in order to reduce the influence of deflection caused by self weight on product quality and performance and the drawing difficulty when a core mold works horizontally, a method of increasing the wall thickness of the core mold to improve the rigidity of the core mold and further reduce the deformation of the core mold is mostly adopted, and the defects are also obvious: 1. the wall thickness increases, the mass increases, the cost increases, and the core becomes very heavy; 2. the increase of the wall thickness increases the self-weight, and the increase of the wall thickness does not obviously increase the benefit of reducing the bending deformation, so the bending deformation can be reduced only to a certain extent; 3. even if the amount of bending deformation of the core mold is reduced to a sufficiently small value by various means, the core mold is not used for a long time and is left horizontally to undergo permanent bending deformation, which seriously affects the service life of the core mold.
Disclosure of Invention
The present invention has been made in view of the above problems. The invention aims to provide a device and a method for actively adjusting the deformation degree of a core mould and eliminating the bending deformation of a ferromagnetic cylindrical core mould with a large length-diameter ratio.
In order to solve the technical problems, the invention adopts the technical scheme that: a device for eliminating bending deformation of a cylindrical core mould with a large length-diameter ratio by zero energy consumption comprises a core mould main body and a straightness sensor, wherein an inner wall of the core mould main body is provided with an inner permanent magnet in a surrounding manner, and an outer permanent magnet is arranged above and/or below the core mould main body;
the straightness sensor is used for measuring the bending direction and degree of the core mold main body, the distance between the external permanent magnet and the core mold main body is adjustable, and bending deformation is eliminated by changing the acting force of the external permanent magnet on the core mold main body.
Furthermore, a tension permanent magnet is arranged above the core mold main body, and a buoyancy permanent magnet is arranged below the core mold main body.
Furthermore, the pulling force permanent magnet and the buoyancy permanent magnet are symmetrically encircled on the upper side and the lower side of the core mold main body in an arc shape.
Further, the central angle of the pulling permanent magnet and the buoyancy permanent magnet is not more than 120 degrees.
Furthermore, the inner diameter cambered surface and the outer diameter cambered surface of the pulling permanent magnet and the buoyancy permanent magnet are two poles of a magnetic field respectively, the inner diameter cambered surface of the buoyancy permanent magnet is opposite to the magnetic pole of the inner diameter cambered surface of the pulling permanent magnet, the inner diameter cambered surface of the buoyancy permanent magnet is the same as the magnetic pole of the outer diameter cambered surface of the in-mold permanent magnet, and the inner diameter cambered surface of the pulling permanent magnet is opposite to the magnetic pole of the outer diameter cambered surface of the in-mold permanent magnet.
Furthermore, the interior permanent magnet includes neodymium magnet piece and baffle, and neodymium magnet piece and baffle closely alternate arrange install in the inner wall surface of mandrel main part, support fixedly by the annular bush that non-ferromagnetic material made, interior permanent magnet uses a complete ring as a set, the group number that interior permanent magnet set up is a set at least.
A method for eliminating bending deformation of a cylindrical core mould with a large length-diameter ratio in a magnetic suspension mode comprises the following steps:
at least one group of in-mold permanent magnets are arranged on the inner wall of the core mold main body in a surrounding mode, and external permanent magnets are arranged above and/or below the core mold main body;
obtaining the straightness of the core mold main body;
and adjusting the distance between the outer permanent magnet and the core mold main body in response to the straightness of the core mold main body exceeding a set straightness threshold value, and changing the acting force of the outer permanent magnet on the core mold main body so as to eliminate the bending deformation of the core mold main body.
Compared with the prior art, the invention has the following beneficial effects.
The invention can correct the bending deformation of the cylindrical core mould with large length-diameter ratio only by the magnetic force of the permanent magnet, does not need a complex control system and a mechanical structure, and greatly improves the manufacturing precision of the product. And any bending deformation due to the long-term horizontal placement of the core mold is not generated.
Drawings
Fig. 1 is a schematic structural view of a device for eliminating bending deformation of a cylindrical core mold having a large length-diameter ratio according to a first embodiment of the present invention.
Fig. 2 is a cross-sectional view of the device according to the first embodiment in the axial radial direction.
Fig. 3 is a schematic structural view of a device for eliminating bending deformation of a cylindrical core mold having a large length-diameter ratio according to a second embodiment of the present invention.
Fig. 4 is a side view of the apparatus according to the second embodiment.
In the figure, 1-seal head, 2-core mould body, 3-pulling force permanent magnet, 4-in-mould permanent magnet, 5-annular bush, 6-rotating shaft, 7-linearity sensor, 8-buoyancy permanent magnet, 9-clapboard, 10-lifting guide post, 11-bearing top seat, 12-portal frame, 13-bearing, 14-base and 15-lifting adjusting bolt.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention relates to a device for eliminating bending deformation of a cylindrical core mould with large length-diameter ratio by zero energy consumption, which comprises a core mould main body 2 and a straightness sensor 7, wherein an inner wall of the core mould main body 2 is provided with an inner permanent magnet 4 in a surrounding manner, and an outer permanent magnet is arranged above and/or below the core mould main body 2;
the straightness sensor 7 is used to measure the bending direction and degree of the core mold main body 2, the distance between the external permanent magnet and the core mold main body 2 is adjustable, and the bending deformation is eliminated by changing the acting force of the external permanent magnet on the core mold main body 2.
A tension permanent magnet 3 is arranged above the core mold main body 2, and a buoyancy permanent magnet 8 is arranged below the core mold main body 2.
The pulling permanent magnet 3 and the buoyancy permanent magnet 8 are respectively arc-symmetrically encircled on the upper side and the lower side of the core mould main body 2 together with the core mould main body 2.
The central angle of the tension permanent magnet 3 and the buoyancy permanent magnet 8 is not more than 120 degrees.
The inner diameter cambered surface and the outer diameter cambered surface of the tension permanent magnet 3 and the buoyancy permanent magnet 8 are respectively two stages of magnetic fields, the magnetic poles of the inner diameter cambered surface of the buoyancy permanent magnet 8 and the inner diameter cambered surface of the tension permanent magnet 3 are opposite, and the magnetic poles of the inner diameter cambered surface of the buoyancy permanent magnet 8 and the outer diameter cambered surface of the in-mold permanent magnet 4 are the same. The inner diameter cambered surface of the pulling permanent magnet 3 is opposite to the outer diameter cambered surface of the in-mold permanent magnet 4 in magnetic pole.
The intra-mold permanent magnets 4 comprise neodymium magnet blocks and partition plates 9, the neodymium magnet blocks and the partition plates 8 are closely arranged on the inner wall surface of the core mold main body 2 at intervals, the annular lining 5 made of non-ferromagnetic materials is fixedly supported, the intra-mold permanent magnets 4 are in a group of complete rings, and the number of the groups of the intra-mold permanent magnets 4 is at least one.
A method for eliminating bending deformation of a cylindrical core mould with a large length-diameter ratio by zero energy consumption comprises the following steps:
at least one group of in-mold permanent magnets are arranged on the inner wall of the core mold main body in a surrounding mode, and external permanent magnets are arranged above and/or below the core mold main body;
obtaining the straightness of the core mold main body;
and adjusting the distance between the outer permanent magnet and the core mold main body in response to the straightness of the core mold main body exceeding a set straightness threshold value, and changing the acting force of the outer permanent magnet on the core mold main body so as to eliminate the bending deformation of the core mold main body.
First embodiment
As shown in fig. 1 and 2, the core mold body 2 is of a conventional core mold structure, the wall surface is thinner than that of a conventional core mold, and the wall surface material is preferably a material with higher magnetic permeability or a composite material with high strength, high rigidity, light weight and no diamagnetism. Permanent magnets are provided above and below the core mold main body 2, and a certain distance is maintained from the core mold main body 2. A pair of seal heads 1 are arranged at two ends of the core mould main body 2. The two ends of the end socket 1 are also connected with a rotating shaft 6. The core mold main body 2 is made of Q345 steel with good magnetic conductivity, high strength and high rigidity, the in-mold permanent magnet 4 is made of neodymium magnet blocks with simple structure, convenience in installation and maximum magnetic energy product, a plurality of arc neodymium magnet blocks with the same shape, size and performance and the partition plates 9 are closely arranged on the surface of the inner wall of the middle part of the core mold main body 2 at intervals and are supported and fixed by the annular lining 5, the arc neodymium magnet blocks are assumed to have a small-diameter arc surface as a magnetic field N pole and a large-diameter arc surface as a magnetic field S pole, and the outer surface of the middle part of the core mold main. The annular lining 5 is preferably made of non-ferromagnetic material, and is convenient to mount and dismount. The pulling permanent magnet 3 and the buoyancy permanent magnet 8 are respectively positioned right above and right below the core mold main body 2, the small-diameter arc surfaces of the pulling permanent magnet 3 and the buoyancy permanent magnet 8 are respectively the N pole and the S pole of a magnetic field, the pulling permanent magnet 3 and the buoyancy permanent magnet 8 are respectively concentric with the core mold main body 2 in an initial balance state and respectively show attraction force and repulsion force to the core mold main body 2, and the bending deformation of the core mold with a large length-diameter ratio due to self weight can be obviously reduced under the combined action of the pulling force of the pulling permanent magnet 3 and the buoyancy force of the buoyancy permanent magnet 6.
Before use, the degree of bending of the core mold main body 2 is detected by an appropriate measuring means, for example, a straightness sensor 7, and if the core mold main body 2 is initially detected to be bent downward, the tension permanent magnet 3 and the buoyancy permanent magnet 8 are adjusted to be close to the core mold main body 2 at the same time or at the same time. Along with the reduction of the distance between the tension permanent magnet 3 and the core mold main body 2, the attraction of the tension permanent magnet 3 to the core mold main body 2 is increased, and the downward bending deformation is reduced; or along with the reduction of the distance between the buoyancy permanent magnet 8 and the core mold main body 2, the repulsive force of the buoyancy permanent magnet 8 to the core mold main body 2 is increased, and the downward bending deformation amount is reduced. The distances between the tension permanent magnet 3 and the buoyancy permanent magnet 8 and the core mold main body 2 are gradually adjusted, and the degree of bending of the core mold main body 2 is detected until the downward bending deformation value is 0, and the adjustment is completed.
When the deflection of the core mould main body 2 is detected to be upward at the initial detection, the buoyancy permanent magnet and the pulling permanent magnet are adjusted to be simultaneously or alternatively far away from the core mould. Along with the increase of the distance between the pulling permanent magnet 3 and the core mold main body 2, the attraction of the pulling permanent magnet 3 to the core mold main body 2 is reduced, and the upward bending deformation is reduced; or as the distance between the buoyancy permanent magnet 8 and the core mold main body 2 increases, the repulsive force of the buoyancy permanent magnet 8 to the core mold main body 2 decreases, and the amount of upward bending deformation decreases accordingly. The distances between the tension permanent magnet 3 and the buoyancy permanent magnet 8 and the core mold main body 2 are adjusted continuously and slowly, and the degree of bending of the core mold main body 2 is detected until the upward bending deformation value is 0, and the adjustment is finished.
Second embodiment
The present embodiment is different from the first embodiment in that a distance adjusting means is added, and only the tension permanent magnet 3 is used as the outer permanent magnet in the present embodiment. As shown in fig. 3 and 4, a distance adjusting means is specially designed in order to precisely adjust the distance between the outer permanent magnet and the core mold main body 2. The device comprises a portal frame 12 arranged right above a core mould main body 2, wherein bearing footstands 11 are arranged on bases 14 on two sides of the portal frame 12, and a rotating shaft 6 of the core mould is rotatably fixed in the bearing footstands 11. A lifting guide pillar 10 is arranged above the bearing top seat 11, and the lifting guide pillar 10 is embedded into a column body of a portal frame 12 and can move up and down. The column of the portal frame 12 is provided with a lifting adjusting bolt 15. The bottom of the jack-adjusting bolt 15 is supported on the bearing top mount 11. The height of the column of the gantry 12 can be adjusted by rotating the elevation adjusting bolt 15, and the distance between the tension permanent magnet 3 and the core mold main body 2 is changed.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (7)
1. The utility model provides a device that zero energy consumption eliminated big length to diameter ratio cylinder type mandrel bending deformation which characterized in that: the core mold comprises a core mold main body (2) and a straightness sensor (7), wherein an inner wall of the core mold main body (2) is provided with an in-mold permanent magnet (4) in a surrounding manner, and an external permanent magnet is arranged above and/or below the core mold main body (2);
the straightness sensor (7) is used for measuring the bending direction and degree of the core mold main body (2), the distance between the external permanent magnet and the core mold main body (2) is adjustable, and the bending deformation is eliminated by changing the acting force of the external permanent magnet on the core mold main body (2).
2. The device for eliminating bending deformation of a cylindrical core mould with a large length-diameter ratio by zero energy consumption as claimed in claim 1, is characterized in that: the core mold is characterized in that a tension permanent magnet (3) is arranged above the core mold main body (2), and a buoyancy permanent magnet (8) is arranged below the core mold main body (2).
3. The device for eliminating bending deformation of a cylindrical core mould with a large length-diameter ratio by zero energy consumption as claimed in claim 2, is characterized in that: the tensile permanent magnet (3) and the buoyancy permanent magnet (8) are symmetrically encircled on the upper side and the lower side of the core mold main body (2) in an arc shape.
4. The device for eliminating the bending deformation of the cylindrical core mould with the large length-diameter ratio in the magnetic suspension mode as claimed in claim 3 is characterized in that: the central angle of the tension permanent magnet (3) and the buoyancy permanent magnet (8) is not more than 120 degrees.
5. The device for eliminating bending deformation of a cylindrical core mould with a large length-diameter ratio with zero energy consumption as claimed in claim 3 or 4, is characterized in that: the inner diameter cambered surface and the outer diameter cambered surface of the tension permanent magnet (3) are two poles of a magnetic field respectively, the inner diameter cambered surface of the tension permanent magnet (8) is opposite to the magnetic pole of the inner diameter cambered surface of the tension permanent magnet (3), the inner diameter cambered surface of the tension permanent magnet (8) is the same as the magnetic pole of the outer diameter cambered surface of the in-mold permanent magnet (4), and the inner diameter cambered surface of the tension permanent magnet (3) is opposite to the magnetic pole of the outer diameter cambered surface of the in-mold permanent magnet (4).
6. The device for eliminating bending deformation of a cylindrical core mould with a large length-diameter ratio by zero energy consumption as claimed in claim 1, is characterized in that: the interior permanent magnet (4) of mould includes neodymium magnet piece and baffle (9), and neodymium magnet piece and baffle (8) closely alternate arrange install in the inner wall surface of mandrel main part (2), support fixedly by annular bush (5) that non-ferromagnetic material made, interior permanent magnet (4) of mould uses a complete ring as a set of, the group number that interior permanent magnet (4) set up is a set of at least.
7. A method for eliminating bending deformation of a cylindrical core mould with a large length-diameter ratio by zero energy consumption is characterized by comprising the following steps:
at least one group of in-mold permanent magnets are arranged on the inner wall of the core mold main body in a surrounding mode, and external permanent magnets are arranged above and/or below the core mold main body;
obtaining the straightness of the core mold main body;
and adjusting the distance between the outer permanent magnet and the core mold main body in response to the straightness of the core mold main body exceeding a set straightness threshold value, and changing the acting force of the outer permanent magnet on the core mold main body so as to eliminate the bending deformation of the core mold main body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010695055.4A CN111923296A (en) | 2020-07-19 | 2020-07-19 | Device and method for eliminating bending deformation of cylindrical core mold with large length-diameter ratio without energy consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010695055.4A CN111923296A (en) | 2020-07-19 | 2020-07-19 | Device and method for eliminating bending deformation of cylindrical core mold with large length-diameter ratio without energy consumption |
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| CN111923296A true CN111923296A (en) | 2020-11-13 |
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| CN202010695055.4A Pending CN111923296A (en) | 2020-07-19 | 2020-07-19 | Device and method for eliminating bending deformation of cylindrical core mold with large length-diameter ratio without energy consumption |
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