CN104148428A - Cold extrusion forming method of axisymmetric pull rod joint part - Google Patents

Cold extrusion forming method of axisymmetric pull rod joint part Download PDF

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Publication number
CN104148428A
CN104148428A CN201410313312.8A CN201410313312A CN104148428A CN 104148428 A CN104148428 A CN 104148428A CN 201410313312 A CN201410313312 A CN 201410313312A CN 104148428 A CN104148428 A CN 104148428A
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blank
cold
minute
rod head
carried
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CN201410313312.8A
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Chinese (zh)
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CN104148428B (en
Inventor
龚红英
李会肖
仇丹丹
姜民主
廖泽寰
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上海工程技术大学
上海东芙冷锻制造有限公司
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Abstract

The invention relates to a cold extrusion forming method of an axisymmetric pull rod joint part. The cold extrusion forming method comprises the following steps: (1) preparing a pull rod joint workblank; (2) annealing the workblank, so as to soften the workblank; (3) performing shot blasting on the annealed workblank, so as to eliminate burrs and oxide skins; (4) phosphatizing and saponifying the workblank after shot blasting; (5) putting the workblank into a blank preparation die, so as to prepare blanks and obtain the blanks; (6) pressing the blanks; (7) phosphatizing and saponifying the blanks; (8) putting the blanks into a forming die and performing cold extrusion forming; and (9) machining a formed part, so as to prepare the axisymmetric pull rod joint part. Compared with the prior art, the extrusion production method for producing the pull rod joint part has the advantages that the production process is perfect, the material utilization ratio is high, the mechanical property of the part is good, the production cost is low, the required equipment tonnage is low, and the method conforms to the requirement of modern green manufacturing and has great social benefits.

Description

A kind of cold-extrusion shaping method of axial symmetry rod head part
Technical field
The present invention relates to metal material Technology of Plastic Processing field, especially relate to the cold-extrusion shaping method of a kind of automobile axial symmetry rod head part.
Background technology
In manufacturing industry, often have the machine components that some strengths of materials are higher, complex-shaped, need to bear high load in work, in system, play an important role, these parts have higher requirements to dimensional accuracy and mechanical property.The traditional forming technology of this class part generally has two kinds: adopt the direct machining of raw material; Machining after forge hot profile.
For first method, part mechanical property is difficult to reach requirement, and the utilization rate of material is very low, and by making, the cost of product is very high, in day by day fierce market competition, is substantially eliminated.What most domestic adopted at present is second method.This method heating-up temperature is high, and the resistance of deformation of material is reduced greatly, and plastic history is comparatively easy, but its shortcoming is still obvious.First, although through plastic working, the mechanical property of product is increased than the first, because heating-up temperature is high, when shaping workpiece with phenomenons such as serious oxidation, decarburization, overheated, burning, thereby have influence on the service property (quality) of product.Secondly,, although combine with machining through forging, the stock utilization of product is improved a lot compared with the first, but still can not meet modern society because of an urgent demand of raw material worsening shortages to " green manufacturing ".Therefore, seeking a kind of stock utilization is high, product mechanical property is good Precision Forming Technology manufactures complex-shaped high strength part and has become the problem of modern manufacturing industry institute extensive concern.
In recent years, extrusion forming technology obtains larger development at home.Modern extrusion forming technology is exactly under cold state, by stronger pressure and speed, metal is squeezed out from die cavity, thereby produces the state-of-the-art technology of the moulding extrusion of size, shape and special mechanical property.From essence, modern extrusion forming technology is mainly the processing that realizes moulding extrusion by the mobile variation of mould control metal.Cold-extrusion technology stock utilization is high, the surface quality of product, dimensional accuracy, mechanical performance are all fine, but also avoided hot forming energy consumption large, easily produce the shortcoming such as add thermal defect, allowance is large, working condition is poor, product quality is not high, be Forging Pieces one of the effective ways produced of refining.
Summary of the invention
Object of the present invention is exactly to provide in order to overcome the defect that above-mentioned prior art exists that a kind of technological process of production is short, product quality is high and the cold-extrusion shaping method of the axial symmetry rod head part of low cost of manufacture.
Object of the present invention can be achieved through the following technical solutions:
A cold-extrusion shaping method for axial symmetry rod head part, comprises the following steps:
(1) prepare rod head blank:
In step (1), prepare the size of the front calculative determination blank of rod head blank, by the method for sawing, round steel is carried out to blanking, obtain rod head blank;
(2) blank is annealed and is made it softening:
Process conditions are: under nitrogen atmosphere protection, at 860-900 DEG C, be incubated 7-8 hour, cool to subsequently 450 DEG C with the furnace and come out of the stove below;
(3) blank after annealing is carried out to Shot Blasting to eliminate burr and oxide skin:
Process conditions are: the pill that is 0.6-1.0mm with diameter is processed 10-25 minute, make blank surface non-scale, rusty stain surface color light evenly;
(4) blank after Shot Blasting is carried out to phosphatization saponification:
Process conditions comprise the following steps successively: degreasing 5-10 minute, cold wash 0.5-1 minute, hot water wash 0.5-1 minute, pickling 5-10 minute, cold wash 0.5-1 minute, hot water wash 0.5-1 minute, phosphatization 10-15 minute, cold wash 0.5-1 minute, hot water wash 0.5-1 minute, saponification 3-5 minute, dewatered drying 2-10 minute;
(5) step (4) blank after treatment is put into blanking mold base and obtain blank;
(6) blank is carried out to swaging:
Process conditions are: on LIC400 cold extrusion press, pressure-shaped mould is installed and is pushed, exert pressure as 4-6Kg/cm 2, speed is 30-50spm;
(7) blank is carried out to phosphatization saponification;
The same step of process conditions (4);
(8) blank is placed in shaping dies cold extrusion shaped:
Process conditions are: on LIC400 cold extrusion press, finishing die is installed and is pushed, exert pressure as 4-6Kg/cm 2, speed is 30-50spm;
(9) part after being shaped is carried out to machined, be prepared into axial symmetry rod head part.
Base and swaging that step (5) and step (6) are described, make metal have good mobility to ensure the required precision of drip molding.
Compared with prior art, the present invention adopts cold-extrusion shaping technology to replace existing machined and heat forging technology carries out the processing of automotive pull rod joint part and mass production will bring huge economic and social benefit.This forming technique is lower than traditional machining technique cost, and productivity ratio is high, and forming accuracy is high, and replace heat forging technology can further save energy consumption, significantly reduce production costs.The part that adopts this technology to produce can well meet technical requirement and the market demand of domestic and international motor corporation, thereby brings huge economic benefit to enterprise.Adopt in addition extrusion method for producing of the present invention to carry out the production of rod head part, can make production technology more perfect, stock utilization is high, part mechanical property is good, and production cost is low, equipment needed thereby tonnage is low, meets modern times " green manufacturing " requirement, has huge social benefit.
Brief description of the drawings
Fig. 1 is process chart of the present invention;
Fig. 2 is the structural representation of axial symmetry rod head part;
Fig. 3 is base process mould schematic diagram of the present invention;
Fig. 4 is cold extrusion shaped process mould schematic diagram of the present invention.
Number in the figure: 1 is Upper Die-sleeve, 2 is patrix, and 3 is blank, and 4 is the first die core, and 5 is the second die core, and 6 is die centre circle, and 7 is die outer ring, and 8 is counterdie trim ring, 9 is ejector beam.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
A cold-extrusion shaping method for axial symmetry rod head part, technique as shown in Figure 1, comprises blanking, annealing, ball blast, phosphatization saponification, base, swaging, phosphatization saponification, cold extrusion shaped, machining processes, specifically comprises the following steps:
(1) prepare rod head blank (blanking):
In step (1), prepare the size of the front calculative determination blank of rod head blank, by the method for sawing, round steel is carried out to blanking, obtain rod head blank;
(2) blank is annealed and is made its softening (annealing):
Process conditions are: under nitrogen atmosphere protection, at 860 DEG C, be incubated 8 hours, cool to subsequently 450 DEG C with the furnace and come out of the stove below;
(3) blank after annealing is carried out to Shot Blasting to eliminate burr and oxide skin (ball blast):
Process conditions are: the pill that is 0.6-1.0mm with diameter is processed 10 minutes, make blank surface non-scale, rusty stain surface color light evenly;
(4) blank after Shot Blasting is carried out to phosphatization saponification (phosphatization saponification):
Process conditions comprise the following steps successively: degreasing 5 minutes, cold wash 0.5 minute, hot water wash 0.5 minute, pickling 5 minutes, cold 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) step (4) blank after treatment is put into blanking mold base and obtain blank (base), base process mould therefor as shown in Figure 3, comprise the Upper Die-sleeve 1, patrix 2, the first die core 4, the second die core 5, die centre circle 6, die outer ring 7, counterdie trim ring 8 and the ejector beam 9 that arrange from top to bottom, wherein blank 3 is between the first die core 4 and patrix 2;
(6) blank is carried out to swaging (swaging):
Process conditions are: on LIC400 cold extrusion press, pressure-shaped mould is installed and is pushed, exert pressure as 4Kg/cm 2, speed is 30spm;
(7) blank is carried out to phosphatization saponification (phosphatization saponification): the same step of process conditions (4);
(8) blank is placed on to cold-extrusion shaping in shaping dies (cold-extrusion shaping), cold extrusion shaped process mould as shown in Figure 4, comprise the Upper Die-sleeve 1, patrix 2, the first die core 4, the second die core 5, die centre circle 6, die outer ring 7, counterdie trim ring 8 and the ejector beam 9 that arrange from top to bottom, wherein blank 3 is between the first die core 4 and patrix 2:
Process conditions are: on LIC400 cold extrusion press, finishing die is installed and is pushed, exert pressure as 4Kg/cm 2, speed is 30spm;
(9) part after being shaped is carried out to machined, be prepared into axial symmetry rod head part (machined).
Step (5) and step (6) base and swaging, make metal have good mobility to ensure the required precision of drip molding.
Adopt axial symmetry rod head part that above-mentioned technique prepares as shown in Figure 2, part mechanical property is good.
Adopt in addition above-mentioned extrusion method for producing to carry out the production of rod head part, can make production technology more perfect, stock utilization is high, traditional handicraft discharge quantity 0.39Kg, and employing cold extrusion technology discharge quantity is 0.225Kg, saves material 42.3%.Part mechanical property is good, and after extruding, the product strength that obtains improves greatly, and production cost is low, and equipment needed thereby tonnage is low, meets modern times " green manufacturing " requirement, has huge social benefit.
Embodiment 2
A cold-extrusion shaping method for axial symmetry rod head part, technique as shown in Figure 1, comprises blanking, annealing, ball blast, phosphatization saponification, base, swaging, phosphatization saponification, cold extrusion shaped, machining processes, specifically comprises the following steps:
(1) prepare rod head blank (blanking):
In step (1), prepare the size of the front calculative determination blank of rod head blank, by the method for sawing, round steel is carried out to blanking, obtain rod head blank;
(2) blank is annealed and is made its softening (annealing):
Process conditions are: under nitrogen atmosphere protection, at 880 DEG C, be incubated 7 hours, cool to subsequently 450 DEG C with the furnace and come out of the stove below;
(3) blank after annealing is carried out to Shot Blasting to eliminate burr and oxide skin (ball blast):
Process conditions are: the pill that is 0.6-1.0mm with diameter is processed 18 minutes, make blank surface non-scale, rusty stain surface color light evenly;
(4) blank after Shot Blasting is carried out to phosphatization saponification (phosphatization saponification):
Process conditions comprise the following steps successively: degreasing 7 minutes, cold wash 0.8 minute, hot water wash 0.8 minute, pickling 8 minutes, cold 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) step (4) blank after treatment is put into blanking mold base and obtain blank (base), base process mould therefor as shown in Figure 3, comprise the Upper Die-sleeve 1, patrix 2, the first die core 4, the second die core 5, die centre circle 6, die outer ring 7, counterdie trim ring 8 and the ejector beam 9 that arrange from top to bottom, wherein blank 3 is between the first die core 4 and patrix 2;
(6) blank is carried out to swaging (swaging):
Process conditions are: on LIC400 cold extrusion press, pressure-shaped mould is installed and is pushed, exert pressure as 5Kg/cm 2, speed is 40spm;
(7) blank is carried out to phosphatization saponification (phosphatization saponification): the same step of process conditions (4);
(8) blank is placed on to cold-extrusion shaping in shaping dies (cold-extrusion shaping), cold extrusion shaped process mould as shown in Figure 4, comprise the Upper Die-sleeve 1, patrix 2, the first die core 4, the second die core 5, die centre circle 6, die outer ring 7, counterdie trim ring 8 and the ejector beam 9 that arrange from top to bottom, wherein blank 3 is between the first die core 4 and patrix 2:
Process conditions are: on LIC400 cold extrusion press, finishing die is installed and is pushed, exert pressure as 5Kg/cm 2, speed is 40spm;
(9) part after being shaped is carried out to machined, be prepared into axial symmetry rod head part (machined).
Step (5) and step (6) base and swaging, make metal have good mobility to ensure the required precision of drip molding.
Adopt axial symmetry rod head part that above-mentioned technique prepares as shown in Figure 2, part mechanical property is good, and after extruding, the product strength that obtains improves greatly, and production cost is low, equipment needed thereby tonnage is low, meets modern times " green manufacturing " requirement, has huge social benefit.
Embodiment 3
A cold-extrusion shaping method for axial symmetry rod head part, technique as shown in Figure 1, comprises blanking, annealing, ball blast, phosphatization saponification, base, swaging, phosphatization saponification, cold extrusion shaped, machining processes, specifically comprises the following steps:
(1) prepare rod head blank (blanking):
In step (1), prepare the size of the front calculative determination blank of rod head blank, by the method for sawing, round steel is carried out to blanking, obtain rod head blank;
(2) blank is annealed and is made its softening (annealing):
Process conditions are: under nitrogen atmosphere protection, at 900 DEG C, be incubated 7 hours, cool to subsequently 450 DEG C with the furnace and come out of the stove below; ;
(3) blank after annealing is carried out to Shot Blasting to eliminate burr and oxide skin (ball blast):
Process conditions are: the pill that is 0.6-1.0mm with diameter is processed 25 minutes, make blank surface non-scale, rusty stain surface color light evenly;
(4) blank after Shot Blasting is carried out to phosphatization saponification (phosphatization saponification):
Process conditions comprise the following steps successively: degreasing 10 minutes, cold wash 1 minute, hot water wash 1 minute, pickling 10 minutes, cold wash 1 minute, hot water wash 1 minute, phosphatization 15 minutes, cold wash 1 minute, hot water wash 1 minute, saponification 5 minutes, dewatered drying 10 minutes;
(5) step (4) blank after treatment is put into blanking mold base and obtain blank (base), base process mould therefor as shown in Figure 3, comprise the Upper Die-sleeve 1, patrix 2, the first die core 4, the second die core 5, die centre circle 6, die outer ring 7, counterdie trim ring 8 and the ejector beam 9 that arrange from top to bottom, wherein blank 3 is between the first die core 4 and patrix 2;
(6) blank is carried out to swaging (swaging):
Process conditions are: on LIC400 cold extrusion press, pressure-shaped mould is installed and is pushed, exert pressure as 6Kg/cm 2, speed is 50spm; ;
(7) blank is carried out to phosphatization saponification (phosphatization saponification): the same step of process conditions (4);
(8) blank is placed on to cold-extrusion shaping in shaping dies (cold-extrusion shaping), cold extrusion shaped process mould as shown in Figure 4, comprise the Upper Die-sleeve 1, patrix 2, the first die core 4, the second die core 5, die centre circle 6, die outer ring 7, counterdie trim ring 8 and the ejector beam 9 that arrange from top to bottom, wherein blank 3 is between the first die core 4 and patrix 2:
Process conditions are: on LIC400 cold extrusion press, finishing die is installed and is pushed, exert pressure as 6Kg/cm 2, speed is 50spm;
(9) part after being shaped is carried out to machined, be prepared into axial symmetry rod head part (machined).
Step (5) and step (6) base and swaging, make metal have good mobility to ensure the required precision of drip molding.
Adopt axial symmetry rod head part that above-mentioned technique prepares as shown in Figure 2, part mechanical property is good, and after extruding, the product strength that obtains improves greatly, and production cost is low, equipment needed thereby tonnage is low, meets modern times " green manufacturing " requirement, has huge social benefit.

Claims (8)

1. a cold-extrusion shaping method for axial symmetry rod head part, is characterized in that, the method comprises the following steps:
(1) prepare rod head blank;
(2) blank is annealed and made it softening;
(3) blank after annealing is carried out to Shot Blasting to eliminate burr and oxide skin;
(4) blank after Shot Blasting is carried out to phosphatization saponification;
(5) step (4) blank after treatment is put into blanking mold base and obtain blank;
(6) blank is carried out to swaging;
(7) blank is carried out to phosphatization saponification;
(8) blank is placed in shaping dies cold extrusion shaped;
(9) part after being shaped is carried out to machined, be prepared into axial symmetry rod head part.
2. the cold-extrusion shaping method of a kind of axial symmetry rod head part according to claim 1, it is characterized in that, in step (1), prepare the size of the front calculative determination blank of rod head blank, by the method for sawing, round steel is carried out to blanking, obtain rod head blank.
3. the cold-extrusion shaping method of a kind of axial symmetry rod head part according to claim 1; it is characterized in that; the process conditions of in step (2), blank being annealed are: under nitrogen atmosphere protection; at 860-900 DEG C, be incubated 7-8 hour, cool to subsequently 450 DEG C with the furnace and come out of the stove below.
4. the cold-extrusion shaping method of a kind of axial symmetry rod head part according to claim 1, it is characterized in that, the process conditions of in step (3), the blank after annealing being carried out to Shot Blasting are: the pill that is 0.6-1.0mm with diameter is processed 10-25 minute, make blank surface non-scale, rusty stain surface color light even.
5. the cold-extrusion shaping method of a kind of axial symmetry rod head part according to claim 1, it is characterized in that, the process conditions of in step (4), the blank after Shot Blasting being carried out to phosphatization saponification comprise the following steps successively: degreasing 5-10 minute, cold wash 0.5-1 minute, hot water wash 0.5-1 minute, pickling 5-10 minute, cold wash 0.5-1 minute, hot water wash 0.5-1 minute, phosphatization 10-15 minute, cold wash 0.5-1 minute, hot water wash 0.5-1 minute, saponification 3-5 minute, dewatered drying 2-10 minute.
6. the cold-extrusion shaping method of a kind of axial symmetry rod head part according to claim 1, it is characterized in that, the process conditions of in step (6), blank being carried out to swaging are: pressure-shaped mould is installed on cold extrusion press and is pushed, exert pressure as 4-6Kg/cm 2, speed is 30-50spm.
7. the cold-extrusion shaping method of a kind of axial symmetry rod head part according to claim 1, is characterized in that, in step (7), blank is carried out the same step of process conditions (4) of phosphatization saponification.
8. the cold-extrusion shaping method of a kind of axial symmetry rod head part according to claim 1, it is characterized in that, process conditions cold extrusion shaped in step (8) are: finishing die is installed on cold extrusion press and is pushed, exert pressure as 4-6Kg/cm 2, speed is 30-50spm.
CN201410313312.8A 2014-07-02 2014-07-02 A kind of cold-extrusion shaping method of axial symmetry rod head part CN104148428B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105880304A (en) * 2016-05-27 2016-08-24 上海工程技术大学 Cold extruding forming method used for automotive spline sleeve part

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Publication number Priority date Publication date Assignee Title
EP1355751B1 (en) * 2001-01-09 2007-05-09 ZF Lemförder Metallwaren AG Method for producing a housing for a ball joint
CN1651789A (en) * 2005-01-28 2005-08-10 陈波 Cold extruding process for producing conic trianglar teeth of conic clutch
CN102921845A (en) * 2011-08-10 2013-02-13 上海东芙冷锻制造有限公司 Method for machining steering ball pin of automobile

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Publication number Priority date Publication date Assignee Title
CN105880304A (en) * 2016-05-27 2016-08-24 上海工程技术大学 Cold extruding forming method used for automotive spline sleeve part

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