CN105880304A - Cold extruding forming method used for automotive spline sleeve part - Google Patents
Cold extruding forming method used for automotive spline sleeve part Download PDFInfo
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- CN105880304A CN105880304A CN201610363343.3A CN201610363343A CN105880304A CN 105880304 A CN105880304 A CN 105880304A CN 201610363343 A CN201610363343 A CN 201610363343A CN 105880304 A CN105880304 A CN 105880304A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/03—Making uncoated products by both direct and backward extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
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- 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
- C21D1/26—Methods of annealing
-
- 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
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Forging (AREA)
Abstract
The invention relates to a cold extruding forming method used for an automotive spline sleeve part. The spline sleeve is in an axisymmetrical cylinder shape. Axial involute spline tooth are formed in the inner surface of the body of a cylinder and the outer surface of the body of the cylinder. The end surfaces of outer spline tooth are in an arc shape. The method comprises the following steps: (1) preparing billets of the spline sleeve part; (2) annealing the billets to soften the billets; (3) conducting slot blasting treatment of the annealed billets to remove burrs and scale; (4) conducting lubricating treatment of the billets which is subjected to the slot blasting treatment; (5) conducting extruding and forming treatment of the billets which is treated by step (4) to make inner spline tooth and the outer spline tooth be extruded and formed all at once; (6) forming the arc-shaped end surfaces of the outer spline tooth by using a back pressure device. Compared with the prior art, the spline sleeve part produced by utilizing the cold extruding forming method has the advantages that the mechanical property is good, the material utilization rate is high, the defect that tooth-shaped die cavity can not be fully filled can be avoided and the production process flow is short.
Description
Technical field
The present invention relates to metal material Technology of Plastic Processing field, especially relate to a kind of automotive spline housing part
Cold-extrusion shaping method.
Background technology
Spline because having advantages such as can guarantee that constant gear ratio, transmission efficiency scope is big, efficiency is high, life-span length,
Being widely used in various drive system, the density of spline tooth, hardness and performance are closely bound up with production technology.Mesh
Before, the common manufacturing process of this kind of part has three kinds: one to be machining, and two is PM technique casting forming,
Three is Plastic Forming.
When using machining spline tooth, the fiber of parts of tooth is cut off by broaching tool, reduces the intensity of spline,
Affecting its bearing capacity, and stock utilization is low, the working cycle is long, and production cost is high, in the face of fierce market
Competition, it is the most awkward that the method for traditional machining spline shows.Second method is that powder metallurgy becomes
Shape, although utilize PM technique to be capable of the industrialization of part spline class part, but owing to the method is
Allow metal dust be pressed into required part shape, then form through the most sintered, metal material in the process
Material does not form metallic fiber stream through rolling, is a kind of No yield point mechanical performance so that powder metallurgy toothed
Tissue density is poor, and bending resistance, shearing strength are the most undesirable.Additionally, the spline class part exact scale of high temperature sintering molding
Very little being difficult to is controlled, and the roughness on spline tooth surface is big, it is difficult to reach intended prescription.
The extrusion technique being used widely at present, is to realize shaping by the flowing of mold cavity control metal,
Thus manufacture the metallic article of difformity, size and mechanical property.Extrusion forming technology can guarantee that metallic fiber stream
Dynamic not being cut off, the flow harden characteristic of available metal improves the intensity of formation of parts, make part bearing capacity,
Safety and service life are improved.Law of minimum resistance according in Plastic Forming: when punch is to placement
When metal stock in die applies pressure, metal both direction up and down flows, and deformable metal is preferentially to resistance
The position flowing that power is little, the metal contact ejector beam that the fast metal that flows is slow prior to flowing；So using common extruding
When hub splines is formed by method, due to barrel end metal than spline tooth position metal flow faster,
Cause easily occurring at profile of tooth that phenomenon that mold cavity is not fully filled produces defect so that the product of production does not reaches and sets
Meter requirement.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and a kind of mechanical property is provided
Well, the cold-extrusion shaping method of the automotive spline housing part of low cost of manufacture.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of cold-extrusion shaping method of automotive spline housing part, described spline housing cylindrical shape axisymmetricly, cylinder
Inner and outer surfaces on all offer axial involute spline tooth, the end face of external spline teeth presents arc-shaped, the party
Method comprises the following steps:
(1) spline housing part blank is prepared；
(2) blank being carried out annealing makes it soften；
(3) blank after annealing is carried out Shot Blasting to eliminate burr and oxide skin；
(4) blank after Shot Blasting is lubricated process；
(5) blank after step (4) being processed carries out swaging so that the disposable extrusion molding of interior external spline teeth；
(6) back pressure apparatus is used to shape external spline teeth end face arc-shaped.
The process conditions in step (2) annealed blank are: under nitrogen atmosphere is protected, at 860-950 DEG C
Lower insulation 5-9 hour, cools to less than 450 DEG C subsequently with the furnace and comes out of the stove.
The process conditions that blank after annealing carries out in step (3) Shot Blasting are: use a diameter of 0.5-1.0mm
Pill process 10-30 minute, make blank surface non-scale, rusty stain surface color light uniformly.
The process conditions that blank after Shot Blasting is lubricated in step (4) process comprise the following steps successively:
Defat 5-10 minute, cold water wash 0.5-2 minute, hot water wash 0.5-2 minute, pickling 5-10 minute, cold
Wash 0.5-2 minute, hot water wash 0.5-2 minute, phosphatization 10-20 minute, cold water wash 0.5-2 minute,
Hot water wash 0.5-2 minute, saponification 3-10 minute, dewatered drying 2-15 minute.
The process conditions that blank carries out in step (5) swaging are: install shaping dies on cold extrusion press and carry out
Extruding, applying pressure is 2-10Kg/cm2, speed is 30-60spm.
The shape of shaping dies and the spline housing selected during the internal disposable extrusion molding of external spline teeth in step (5),
Structure and size match.The spline tooth using the method to squeeze out shapes field width, both can shape and run through axle sleeve
Full tooth, it is also possible to the local tooth that forming axis puts, this extrusion process can prepare a class spline with axially symmetric structure
Axle sleeve, and it is not limited to single form.
In step (6), use Back Pressure Damping power fully enclosed die forging, i.e. execute at the outer formed toothed end of spline housing
Adding buffer brake, back pressure is 2-10Kg/cm2, the pressure time is 2-5S.Specifically, back pressure apparatus is utilized
In liquid (gas) pressure cylinder piston cavity of resorption in the back pressure that produces of pressure oil (gas), barrel end is applied opposite force,
Make this position flow rate of metal slow down, suppress this position metal flow, and the resistance of the slow metal of original toothed section flow velocity
Power is relatively reduced, and flow velocity is accelerated, and then metal flow rates reaches unanimity on the whole.The size of back pressure is passed through
Overflow valve regulates, and after extrusion molding terminates, upper mold is with press ram backhaul, the cavity of resorption of liquid (gas) pressure cylinder piston
Logical pressure oil (gas) makes to move on piston lower push rod, is ejected by spline housing from die.Outside using back pressure apparatus to make
The abundant mold filling of spline tooth end plane metal, shapes arc-shaped, solves and occur at profile of tooth that mold cavity is not fully filled and produces
Defect, product do not reach the problem that design requires.
Compared with prior art, the present invention uses cold extruding technique disposably to shape the inside and outside tooth of spline housing, and
The shaping of arc-shaped increment is realized in conjunction with back pressure apparatus.This manufacturing process and tradition broaching tool processing spline tooth method phase
Ratio, stock utilization is high, and with short production cycle, part mechanical property is good；Avoid powder metallurgical gear equipment needed thereby
The shortcomings such as tonnage is big, tissue density is poor, surface roughness is big；Solve the problem that circular arc increment metal mold filling is discontented.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
Fig. 2 is the squeezing moulded mould structure schematic diagram of the present invention；
Label in figure: 1 is punch, 2 is punch die sleeve, and 3 is die, and 4 is blank, and 5 is die outer ring, 6
For die trim ring, 7 is back pressure apparatus, and 8 is lower push rod.
Fig. 3 is the automotive spline housing design of part schematic diagram that embodiment 1 prepares；
Fig. 4 is the automotive spline housing design of part schematic diagram that embodiment 2 prepares；
Fig. 5 is the automotive spline housing design of part schematic diagram that embodiment 3 prepares.
Detailed description of the invention
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
The cold-extrusion shaping method of a kind of automotive spline housing part, design of part is as it is shown on figure 3, forming technology is as schemed
Shown in 1, become including blanking, annealing, ball blast, lubricated, the disposable extrusion molding of interior external tooth, back pressure apparatus
The operations such as shape circular arc increment, specifically comprise the following steps that
(1) spline housing blank is prepared；
(2) annealing makes blank softening；Process conditions are: under nitrogen atmosphere is protected, and are incubated 8 hours at 860 DEG C,
Cool to less than 450 DEG C subsequently with the furnace come out of the stove；
(3) Shot Blasting is to eliminate burr and the oxide skin (ball blast) of blank surface:
Process conditions are: process 10 minutes with the pill of a diameter of 0.6-1.0mm, make blank surface non-scale,
Rusty stain surface color light is uniformly；
(4) blank is lubricated process；
Process conditions comprise the following steps successively: 0.5 minute, hot water wash 0.5 are washed in defat 5 minutes, cold water
Minute, pickling 5 minutes, cold water wash 0.5 minute, hot water wash 0.5 minute, phosphatization 10 minutes, cold
Wash 0.5 minute, hot water wash 0.5 minute, saponification 3 minutes, dewatered drying 2 minutes；
(5) blank is placed in shaping dies, utilizes the disposable inside and outside spline tooth of extrusion molding simultaneously of mould；
Mould therefor, as in figure 2 it is shown, include punch 1, die 3, arranges punch die sleeve 2, recessed outside punch 1
Mould 3 is orderly arranged outside each die trim ring 6 and die outer ring 5, places blank 4 in die 3, and punch 1 is with recessed
Mould 3 cooperation carries out extrusion molding, arranges support blank 4 and blank 4 is carried out back pressure extruding below die 3
Back pressure apparatus 7, is provided with the lower push rod 8 ejected from die by spline housing in back pressure apparatus 7；
Process conditions are: installing pressure-shaped mould on LIC400 cold extrusion press and extrude, applying pressure is 4Kg/cm2,
Speed is 30spm；
(6) utilize back pressure apparatus to apply Back Pressure Damping power at cylinder end, i.e. execute at the outer formed toothed end of spline housing
Adding buffer brake, back pressure is 2Kg/cm2, the pressure time is 5S, suppresses this position metal flow, makes outside
The abundant mold filling of increment metal, shapes arc-shaped.
(7) machining, is prepared as final hub splines part.
Above-mentioned pressing method is used to produce automobile-used hub splines set part, as it is shown on figure 3, improve stock utilization,
Improve production efficiency, improve the mechanical property of part, meet " green manufacturing " requirement, there is good society
Can benefit.
Embodiment 2
The cold-extrusion shaping method of a kind of automotive spline housing part, as shown in Figure 4, forming technology is concrete for design of part
Comprise the following steps:
(1) blank is prepared；
(2) annealing softening；
Process conditions are: under nitrogen atmosphere is protected, and be incubated 7 hours, cool to 450 DEG C subsequently with the furnace at 880 DEG C
Hereinafter come out of the stove；
(3) Shot Blasting；
Process conditions are: process 18 minutes with the pill of a diameter of 0.6-1.0mm, make blank surface non-scale,
Rusty stain surface color light is uniformly；
(4) lubricated；
Process conditions comprise the following steps successively: 0.8 minute, hot water wash 0.8 are washed in defat 7 minutes, cold water
Minute, pickling 8 minutes, cold water wash 0.8 minute, hot water wash 0.8 minute, phosphatization 12 minutes, cold
Wash 0.8 minute, hot water wash 0.8 minute, saponification 4 minutes, dewatered drying 6 minutes；
(5) being placed in shaping dies by blank, shaping dies is as in figure 2 it is shown, inside and outside tooth is disposably squeezed into
Shape；
Process conditions are: installing pressure-shaped mould on LIC400 cold extrusion press and extrude, applying pressure is 5Kg/cm2,
Speed is 40spm；
(6) utilize back pressure apparatus to apply Back Pressure Damping power at cylinder end, i.e. execute at the outer formed toothed end of spline housing
Adding buffer brake, back pressure is 5.0Kg/cm2, the pressure time is 3S, suppresses this position metal flow, makes outside
The abundant mold filling of increment metal, shapes arc-shaped.
(7) blank with profile of tooth is machined out, is prepared as spline housing part.
The hub splines part material utilization rate using this technology to produce is high, and with short production cycle, part mechanical property is good,
The market demand can be met well, thus bring huge economic worth to enterprise.
Embodiment 3
The cold-extrusion shaping method of a kind of automotive spline housing part, design of part is as it is shown in figure 5, manufacturing process is concrete
Comprise the following steps:
(1) blanking；
(2) annealing；
Process conditions are: under nitrogen atmosphere is protected, and be incubated 7 hours, cool to 450 DEG C subsequently with the furnace at 900 DEG C
Hereinafter come out of the stove；
(3) ball blast；
Process conditions are: process 25 minutes with the pill of a diameter of 0.6-1.0mm, make blank surface non-scale,
Rusty stain surface color light is uniformly；
(4) lubrication；
Process conditions comprise the following steps successively: 1 minute, hot water wash 1 point are washed in defat 10 minutes, cold water
Clock, pickling 10 minutes, cold water wash 1 minute, hot water wash 1 minute, phosphatization 15 minutes, cold water
Wash 1 minute, hot water wash 1 minute, saponification 5 minutes, dewatered drying 10 minutes；
(5) blank is placed on the disposable cold-extrusion shaping of inside and outside spline tooth in shaping dies；
(6) utilize back pressure apparatus to apply Back Pressure Damping power at cylinder end, i.e. execute at the outer formed toothed end of spline housing
Adding buffer brake, back pressure is 10Kg/cm2, the pressure time is 2S, suppresses this position metal flow, makes outside
The abundant mold filling of increment metal, shapes arc-shaped.
Process conditions are: installing pressure-shaped mould on LIC400 cold extrusion press and extrude, applying pressure is 6Kg/cm2,
Speed is 50spm；
(7) part after shaping is machined out, is prepared as spline housing part.
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and use to send out
Bright.These embodiments obviously easily can be made various amendment by person skilled in the art, and at this
The General Principle illustrated is applied in other embodiments without through performing creative labour.Therefore, the present invention does not limits
In above-described embodiment, those skilled in the art are according to the announcement of the present invention, without departing from changing that scope is made
Entering and revise all should be within protection scope of the present invention.
Claims (7)
1. a cold-extrusion shaping method for automotive spline housing part, described spline housing cylindrical shape axisymmetricly,
All offering axial involute spline tooth in the inner and outer surfaces of cylinder, the end face of external spline teeth presents arc-shaped,
It is characterized in that, the method comprises the following steps:
(1) spline housing part blank is prepared；
(2) blank being carried out annealing makes it soften；
(3) blank after annealing is carried out Shot Blasting to eliminate burr and oxide skin；
(4) blank after Shot Blasting is lubricated process；
(5) blank after step (4) being processed carries out swaging so that one time, interior external spline teeth position extrusion molding；
(6) back pressure apparatus is used to shape external spline teeth end face arc-shaped.
The cold-extrusion shaping method of a kind of automotive spline housing part the most according to claim 1, its feature exists
In, the process conditions in step (2) annealed blank are: under nitrogen atmosphere is protected, at 860-950 DEG C
Lower insulation 5-9 hour, cools to less than 450 DEG C subsequently with the furnace and comes out of the stove.
The cold-extrusion shaping method of a kind of automotive spline housing part the most according to claim 1, its feature exists
In, the process conditions that the blank after annealing carries out in step (3) Shot Blasting are: use a diameter of 0.5-1.0mm
Pill carry out Shot Blasting 10-30 minute, remove blank surface oxide skin, rusty stain etc., make piece surface bright and clean,
Bright in color, uniformly.
The cold-extrusion shaping method of a kind of automotive spline housing part the most according to claim 1, its feature exists
In the blank after Shot Blasting being lubricated the process conditions of process in step (4), include following step successively
Rapid: defat 5-10 minute, cold water wash 0.5-2 minute, hot water wash 0.5-2 minute, pickling 5-10 minute,
Cold water wash 0.5-2 minute, hot water wash 0.5-2 minute, phosphatization 10-20 minute, cold water wash 0.5-2 minute,
Hot water wash 0.5-2 minute, saponification 3-10 minute, dewatered drying 2-15 minute.
The cold-extrusion shaping method of a kind of automotive spline housing part the most according to claim 1, its feature exists
In, the process conditions that blank carries out in step (5) swaging are: install shaping dies on cold extrusion press and carry out
Extruding, applying pressure is 2-10Kg/cm2, speed is 30-60spm.
The cold-extrusion shaping method of a kind of automotive spline housing part the most according to claim 1, its feature exists
In, the shaping dies selected during internal the extrusion molding in external spline teeth position in step (5) and the shape of spline housing
Shape, structure and size match.
The cold-extrusion shaping method of a kind of automotive spline housing part the most according to claim 1, its feature exists
In, in step (6), use Back Pressure Damping power fully enclosed die forging, i.e. execute at the outer formed toothed end of spline housing
Adding buffer brake, back pressure is 2-10Kg/cm2, the pressure time is 2-5S, makes the position resistance that material flowing is fast
Increase, suppress it to flow, make the abundant mold filling in the material slow position of flowing, so that toothed end shapes consistent.
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| CN201610363343.3A CN105880304A (en) | 2016-05-27 | 2016-05-27 | Cold extruding forming method used for automotive spline sleeve part |
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| CN201610363343.3A CN105880304A (en) | 2016-05-27 | 2016-05-27 | Cold extruding forming method used for automotive spline sleeve part |
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| CN106312829A (en) * | 2016-10-19 | 2017-01-11 | 中铁隆昌铁路器材有限公司 | Treatment process for scale on surface of fastener raw material |
| CN106424191A (en) * | 2016-11-18 | 2017-02-22 | 重庆恒望机械有限公司 | Blind hole rectangular spline cold extrusion forming method |
| CN106862472A (en) * | 2017-03-13 | 2017-06-20 | 谷城天兴机械有限公司 | Wear-resisting circular shaft cold extruding processing method and brake shoe roller axle processing method |
| CN106955965A (en) * | 2017-03-13 | 2017-07-18 | 谷城天兴机械有限公司 | The cold extrusion processing technics of brake shoe roller axle |
| CN108188313A (en) * | 2017-11-29 | 2018-06-22 | 江阴市永兴机械制造有限公司 | A kind of secondary cold extrusion technology of large-diameter outer spline |
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| CN111822536A (en) * | 2020-08-18 | 2020-10-27 | 湖北美克汽车部件股份有限公司 | One-step forming equipment and forming process for spline shaft sleeve |
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| CN113399961A (en) * | 2021-05-20 | 2021-09-17 | 上海工程技术大学 | Extrusion forming method for complex external spline part of vehicle multi-stage shaft lever |
| CN113458171A (en) * | 2021-07-20 | 2021-10-01 | 重庆创精温锻成型有限公司 | Parking tooth shape and internal spline synchronous extrusion forming method |
| CN114713653A (en) * | 2022-03-24 | 2022-07-08 | 上海工程技术大学 | Machining method and forming die assembly for long rod part with threaded teeth for vehicle |
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| CN108188313A (en) * | 2017-11-29 | 2018-06-22 | 江阴市永兴机械制造有限公司 | A kind of secondary cold extrusion technology of large-diameter outer spline |
| CN109174994A (en) * | 2018-08-24 | 2019-01-11 | 太仓久进汽车零部件有限公司 | A kind of steering shaft blanking type cold-extrusion shaping mold and application |
| CN109513760A (en) * | 2019-02-18 | 2019-03-26 | 第拖拉机股份有限公司 | A kind of device and its pressing method of cold extrusion teeth portion boss |
| CN109513760B (en) * | 2019-02-18 | 2024-01-19 | 第一拖拉机股份有限公司 | Device for cold extrusion of tooth boss and extrusion method thereof |
| CN110153209A (en) * | 2019-04-28 | 2019-08-23 | 重庆茂松实业有限公司 | Tricycle rear axle basin shaft gear cold extrusion processing technics |
| CN112058936A (en) * | 2019-06-10 | 2020-12-11 | 上海汽车变速器有限公司 | Cold extrusion molding process of bevel gear |
| CN110860637A (en) * | 2019-11-14 | 2020-03-06 | 广东庆昇科技有限公司 | Surface lubrication treatment process for T-shaped iron part of automobile horn |
| CN111822536A (en) * | 2020-08-18 | 2020-10-27 | 湖北美克汽车部件股份有限公司 | One-step forming equipment and forming process for spline shaft sleeve |
| CN113399961A (en) * | 2021-05-20 | 2021-09-17 | 上海工程技术大学 | Extrusion forming method for complex external spline part of vehicle multi-stage shaft lever |
| CN113458171A (en) * | 2021-07-20 | 2021-10-01 | 重庆创精温锻成型有限公司 | Parking tooth shape and internal spline synchronous extrusion forming method |
| CN114713653A (en) * | 2022-03-24 | 2022-07-08 | 上海工程技术大学 | Machining method and forming die assembly for long rod part with threaded teeth for vehicle |
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