CN104148428B - A kind of cold-extrusion shaping method of axial symmetry rod head part - Google Patents
A kind of cold-extrusion shaping method of axial symmetry rod head part Download PDFInfo
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- CN104148428B CN104148428B CN201410313312.8A CN201410313312A CN104148428B CN 104148428 B CN104148428 B CN 104148428B CN 201410313312 A CN201410313312 A CN 201410313312A CN 104148428 B CN104148428 B CN 104148428B
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Abstract
The present invention relates to a kind of cold-extrusion shaping method of axial symmetry rod head part, comprise the following steps; (1) rod head blank is prepared; (2) carrying out annealing to blank makes it soften; (3) blank after annealing is carried out Shot Blasting to eliminate burr and oxide skin; (4) phosphatization saponification is carried out to the blank after Shot Blasting; (5) blank is put into blanking mold base and obtain blank; (6) swaging is carried out to blank; (7) phosphatization saponification is carried out to blank; (8) blank is placed in shaping dies cold extrusion shaped; (9) machined is carried out to the part after shaping, be prepared into axial symmetry rod head part.Compared with prior art, extrusion method for producing of the present invention is adopted to carry out the production of rod head part, production technology can be made more perfect, stock utilization is high, part mechanical property is good, and production cost is low, and equipment needed thereby tonnage is low, meet modern times " green manufacturing " requirement, there is huge social benefit.
Description
Technical field
The present invention relates to metal material Technology of Plastic Processing field, especially relate to a kind of cold-extrusion shaping method of automobile axial symmetry rod head part.
Background technology
Often have some strengths of materials higher in manufacturing industry, complex-shaped machine components, need in work to bear high load, play an important role in systems in which, these parts have higher requirements to dimensional accuracy and mechanical property.The traditional forming technology of this kind of 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, will the cost of product be made very high, is substantially eliminated in day by day fierce market competition.What current most domestic adopted 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, during shaping, workpiece is with phenomenons such as serious oxidation, decarburization, overheated, burning, thus has influence on the service property (quality) of product.Secondly, although combine with machining through forging, comparatively the first improves a lot to make the stock utilization of product, but still can not meet modern society because raw material worsening shortages is to an urgent demand of " green manufacturing ".Therefore, seek the Precision Forming Technology that a kind of stock utilization is high, product mechanical property is good and manufacture the problem that complex-shaped high strength part has become 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, is squeezed out by metal, thus produce the state-of-the-art technology of the Contoured squeeze part of size, shape and special mechanical property by stronger pressure and speed from die cavity.Inherently, the flowing that modern extrusion forming technology mainly controls metal by mould changes the processing realizing shaping extrusion.Cold-extrusion technology stock utilization is high, the surface quality of product, dimensional accuracy, mechanical performance are all fine, but also avoid hot forming energy consumption large, easily produce shortcomings such as adding thermal defect, allowance is large, working condition is poor, product quality is not high, be that Forging Pieces is refined one of effective ways of producing.
Summary of the invention
Object of the present invention is exactly provide 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 to overcome defect that above-mentioned prior art exists.
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) rod head blank is prepared:
Calculate the size determining blank before preparing rod head blank in step (1), by the method for sawing, blanking is carried out to round steel, obtain rod head blank;
(2) carrying out annealing to blank makes it soften:
Process conditions are: under nitrogen atmosphere protection, be incubated 7-8 hour, cool to less than 450 DEG C subsequently with the furnace and come out of the stove at 860-900 DEG C;
(3) blank after annealing is carried out Shot Blasting to eliminate burr and oxide skin:
Process conditions are: the pill process 10-25 minute with diameter being 0.6-1.0mm, make blank surface non-scale, rusty stain surface color light evenly;
(4) phosphatization saponification is carried out to the blank after Shot Blasting:
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) blank after step (4) being processed is put into blanking mold base and is obtained blank;
(6) swaging is carried out to blank:
Process conditions are: on LIC400 cold extrusion press, install pressure-shaped mould extrude, and applying pressure is 4-6Kg/cm
2, speed is 30-50spm;
(7) phosphatization saponification is carried out to blank;
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, install finishing die extrude, and applying pressure is 4-6Kg/cm
2, speed is 30-50spm;
(9) machined is carried out to the part after shaping, be prepared into axial symmetry rod head part.
Step (5) and the base described in step (6) and swaging, 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 conventional machining techniques cost, and productivity ratio is high, and forming accuracy is high, and replacement heat forging technology can save energy consumption further, significantly reduces production cost.The part adopting this technology to produce can well meet technical requirement and the market demand of domestic and international motor corporation, thus brings huge economic benefit to enterprise.Extrusion method for producing of the present invention is adopted to carry out the production of rod head part in addition, production technology can be made 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.
Accompanying drawing explanation
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, and 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) rod head blank (blanking) is prepared:
Calculate the size determining blank before preparing rod head blank in step (1), by the method for sawing, blanking is carried out to round steel, obtain rod head blank;
(2) carry out annealing to blank to make its softening (annealing):
Process conditions are: under nitrogen atmosphere protection, be incubated 8 hours, cool to less than 450 DEG C subsequently with the furnace and come out of the stove at 860 DEG C;
(3) blank after annealing is carried out Shot Blasting to eliminate burr and oxide skin (ball blast):
Process conditions are: the pill process 10 minutes with diameter being 0.6-1.0mm, make blank surface non-scale, rusty stain surface color light evenly;
(4) phosphatization saponification (phosphatization saponification) is carried out to the blank after Shot Blasting:
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) blank after step (4) being processed is put into blanking mold base and is obtained blank (base), base process mould therefor as shown in Figure 3, comprise arrange from top to bottom Upper Die-sleeve 1, patrix 2, first die core 4, second die core 5, die centre circle 6, die outer ring 7, counterdie trim ring 8 and ejector beam 9, wherein blank 3 is between the first die core 4 and patrix 2;
(6) swaging (swaging) is carried out to blank:
Process conditions are: on LIC400 cold extrusion press, install pressure-shaped mould extrude, and applying pressure is 4Kg/cm
2, speed is 30spm;
(7) phosphatization saponification (phosphatization saponification) is carried out to blank: the same step of process conditions (4);
(8) blank is placed on cold-extrusion shaping in shaping dies (cold-extrusion shaping), cold extrusion shaped process mould as shown in Figure 4, comprise arrange from top to bottom Upper Die-sleeve 1, patrix 2, first die core 4, second die core 5, die centre circle 6, die outer ring 7, counterdie trim ring 8 and ejector beam 9, wherein blank 3 is between the first die core 4 and patrix 2:
Process conditions are: on LIC400 cold extrusion press, install finishing die extrude, and applying pressure is 4Kg/cm
2, speed is 30spm;
(9) machined is carried out to the part after shaping, 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.
As shown in Figure 2, part mechanical property is good for the axial symmetry rod head part adopting above-mentioned technique to prepare.
Adopt above-mentioned extrusion method for producing to carry out the production of rod head part in addition, production technology can be made more perfect, and stock utilization is high, traditional handicraft discharge quantity 0.39Kg, adopt cold extrusion technology then discharge quantity be 0.225Kg, save material 42.3%.Part mechanical property is good, after extruding obtain product strength and greatly improve, 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) rod head blank (blanking) is prepared:
Calculate the size determining blank before preparing rod head blank in step (1), by the method for sawing, blanking is carried out to round steel, obtain rod head blank;
(2) carry out annealing to blank to make its softening (annealing):
Process conditions are: under nitrogen atmosphere protection, be incubated 7 hours, cool to less than 450 DEG C subsequently with the furnace and come out of the stove at 880 DEG C;
(3) blank after annealing is carried out Shot Blasting to eliminate burr and oxide skin (ball blast):
Process conditions are: the pill process 18 minutes with diameter being 0.6-1.0mm, make blank surface non-scale, rusty stain surface color light evenly;
(4) phosphatization saponification (phosphatization saponification) is carried out to the blank after Shot Blasting:
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) blank after step (4) being processed is put into blanking mold base and is obtained blank (base), base process mould therefor as shown in Figure 3, comprise arrange from top to bottom Upper Die-sleeve 1, patrix 2, first die core 4, second die core 5, die centre circle 6, die outer ring 7, counterdie trim ring 8 and ejector beam 9, wherein blank 3 is between the first die core 4 and patrix 2;
(6) swaging (swaging) is carried out to blank:
Process conditions are: on LIC400 cold extrusion press, install pressure-shaped mould extrude, and applying pressure is 5Kg/cm
2, speed is 40spm;
(7) phosphatization saponification (phosphatization saponification) is carried out to blank: the same step of process conditions (4);
(8) blank is placed on cold-extrusion shaping in shaping dies (cold-extrusion shaping), cold extrusion shaped process mould as shown in Figure 4, comprise arrange from top to bottom Upper Die-sleeve 1, patrix 2, first die core 4, second die core 5, die centre circle 6, die outer ring 7, counterdie trim ring 8 and ejector beam 9, wherein blank 3 is between the first die core 4 and patrix 2:
Process conditions are: on LIC400 cold extrusion press, install finishing die extrude, and applying pressure is 5Kg/cm
2, speed is 40spm;
(9) machined is carried out to the part after shaping, 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.
As shown in Figure 2, part mechanical property is good for the axial symmetry rod head part adopting above-mentioned technique to prepare, after extruding obtain product strength and greatly improve, 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) rod head blank (blanking) is prepared:
Calculate the size determining blank before preparing rod head blank in step (1), by the method for sawing, blanking is carried out to round steel, obtain rod head blank;
(2) carry out annealing to blank to make its softening (annealing):
Process conditions are: under nitrogen atmosphere protection, be incubated 7 hours, cool to less than 450 DEG C subsequently with the furnace and come out of the stove at 900 DEG C; ;
(3) blank after annealing is carried out Shot Blasting to eliminate burr and oxide skin (ball blast):
Process conditions are: the pill process 25 minutes with diameter being 0.6-1.0mm, make blank surface non-scale, rusty stain surface color light evenly;
(4) phosphatization saponification (phosphatization saponification) is carried out to the blank after Shot Blasting:
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) blank after step (4) being processed is put into blanking mold base and is obtained blank (base), base process mould therefor as shown in Figure 3, comprise arrange from top to bottom Upper Die-sleeve 1, patrix 2, first die core 4, second die core 5, die centre circle 6, die outer ring 7, counterdie trim ring 8 and ejector beam 9, wherein blank 3 is between the first die core 4 and patrix 2;
(6) swaging (swaging) is carried out to blank:
Process conditions are: on LIC400 cold extrusion press, install pressure-shaped mould extrude, and applying pressure is 6Kg/cm
2, speed is 50spm; ;
(7) phosphatization saponification (phosphatization saponification) is carried out to blank: the same step of process conditions (4);
(8) blank is placed on cold-extrusion shaping in shaping dies (cold-extrusion shaping), cold extrusion shaped process mould as shown in Figure 4, comprise arrange from top to bottom Upper Die-sleeve 1, patrix 2, first die core 4, second die core 5, die centre circle 6, die outer ring 7, counterdie trim ring 8 and ejector beam 9, wherein blank 3 is between the first die core 4 and patrix 2:
Process conditions are: on LIC400 cold extrusion press, install finishing die extrude, and applying pressure is 6Kg/cm
2, speed is 50spm;
(9) machined is carried out to the part after shaping, 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.
As shown in Figure 2, part mechanical property is good for the axial symmetry rod head part adopting above-mentioned technique to prepare, after extruding obtain product strength and greatly improve, and production cost is low, equipment needed thereby tonnage is low, meets modern times " green manufacturing " requirement, has huge social benefit.
Claims (7)
1. a cold-extrusion shaping method for axial symmetry rod head part, is characterized in that, the method comprises the following steps:
(1) rod head blank is prepared;
(2) carrying out annealing to blank makes it soften;
(3) blank after annealing is carried out Shot Blasting to eliminate burr and oxide skin;
(4) carry out phosphatization saponification to the blank after Shot Blasting, 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) blank after step (4) being processed is put into blanking mold base and is obtained blank;
(6) swaging is carried out to blank;
(7) phosphatization saponification is carried out to blank;
(8) blank is placed on cold-extrusion shaping in shaping dies;
(9) machined is carried out to the part after shaping, 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, calculate the size determining blank before preparing rod head blank in step (1), by the method for sawing, blanking is carried out to round steel, 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; in step (2) to the process conditions that blank is annealed be: under nitrogen atmosphere protection; at 860-900 DEG C, be incubated 7-8 hour, cool to less than 450 DEG C subsequently with the furnace and come out of the stove.
4. 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 (3) to the process conditions that the blank after annealing carries out Shot Blasting be: the pill process 10-25 minute with diameter being 0.6-1.0mm, make blank surface non-scale, rusty stain, surface color is bright, even.
5. the cold-extrusion shaping method of a kind of axial symmetry rod head part according to claim 1, is characterized in that, is: on cold extrusion press, install pressure-shaped mould extrude, applying pressure is 4-6Kg/cm in step (6) to the process conditions that blank carries out swaging
2, speed is 30-50spm.
6. 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 to the same step of process conditions (4) of phosphatization saponification.
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 (8), the process conditions of cold-extrusion shaping are: on cold extrusion press, install finishing die extrude, applying pressure is 4-6Kg/cm
2, speed is 30-50spm.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| CN112024632A (en) * | 2020-07-21 | 2020-12-04 | 湖北隐冠轴业有限公司 | One-step cold extrusion forming process for multi-shoulder stepped shaft of automobile |
| CN112658052A (en) * | 2020-11-13 | 2021-04-16 | 玉环市东南塑胶机电有限公司 | Cold extrusion forming process and die for contact finger part of high-voltage electrical appliance |
| CN113399961B (en) * | 2021-05-20 | 2023-04-07 | 上海工程技术大学 | Extrusion forming method for complex external spline part of vehicle multi-order shaft lever |
| CN113847498A (en) * | 2021-09-13 | 2021-12-28 | 嘉兴华人液压科技有限公司 | New energy battery cooling pack end connector, tool clamp and technological method thereof |
| CN114011896A (en) * | 2021-10-11 | 2022-02-08 | 南京金城三国机械电子有限公司 | Softening method of cold extrusion blank |
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| EP1355751B1 (en) * | 2001-01-09 | 2007-05-09 | ZF Lemförder Metallwaren AG | Method for producing a housing for a ball joint |
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