CN105251932A - Cold heading forming process for transmission shaft and heavy extruding die structure for forming teeth - Google Patents
Cold heading forming process for transmission shaft and heavy extruding die structure for forming teeth Download PDFInfo
- Publication number
- CN105251932A CN105251932A CN201510768539.6A CN201510768539A CN105251932A CN 105251932 A CN105251932 A CN 105251932A CN 201510768539 A CN201510768539 A CN 201510768539A CN 105251932 A CN105251932 A CN 105251932A
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- China
- Prior art keywords
- cushion block
- main mould
- main
- punch die
- mould
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
Abstract
The invention relates to a cold heading forming process for a transmission shaft. The process comprises the steps as follows: S1, shearing a wire rod; S2, contracting the bottom of the wire rod; S3, contracting the top of the wire rod and contracting the bottom of the wire rod into a tapered shape; S4, contracting the top of the wire rod into a square; S5, upsetting the top, the middle portion and the bottom for the first time; S6, upsetting the top, the middle portion and the bottom for the second time; and S7, performing heavy extruding for forming bottom teeth. The die structure comprises a main die unit and a trimming die unit; the main die unit comprises a main die casing, an inner die of the main die, an inner cushion block of the main die and a main die thimble; the trimming die unit comprises a trimming die casing, a trimming die thimble and a thimble cushion block; the inner cushion block of the main die comprises a first inner cushion block of the main die and a second inner cushion block of the main die; a main die insert is arranged in the center of the inner die of the main die; a through hole is formed in the bottom of a main die cavity; the main die thimble is arranged in the middle of the first inner cushion block of the main die; and a main die ejection rod is arranged in the middle of the second inner cushion block of the main die. Internal crystalline grains of a product are refined through cold heading, extrusion and deformation; an intact metal flow line is also provided; the strength and the plasticity of the product are more excellent; and the mechanical property is improved.
Description
Technical field
The present invention relates to Machining Technology field, especially relate to the mould structure of tooth bottom a kind of cold-heading molding technique of power transmission shaft and intense beam.
Background technology
At present, power transmission shaft is auto-producing critical piece, be mainly used in automobile doo lock motor, the quality of production of power transmission shaft also affects the security of whole automobilism, the production of power transmission shaft needs multiple working procedure to process usually, after normally extruded by mold hot, the mode adopting machined or CNC to mill out driving cog and cubic driving end again carries out machine-shaping, unnecessary waste material is removed by the process of machined and milling, reach requirement, its interior tissue of the driving cog of such processing does not move towards in streamline and intensity is not high, affect the mechanical property of power transmission shaft, thus reduce service life and the scope of product, and the waste material needing machined and milling machine operation to remove is more and production efficiency is low, cause waste, thus considerably increase the production cost of product and the less stable of product, do not meet the requirement of Reducing Cost in Enterprises.
Summary of the invention
Technical problem to be solved by this invention is to provide the mould structure of tooth bottom a kind of cold-heading molding technique of power transmission shaft and intense beam, adopt cold-heading technology to complete the manufacture of whole part, ensure that inner flow-line is complete, improve intensity and the stability of part, add service life, saving resource.
The present invention solves the technical scheme that its technical problem takes: a kind of cold-heading molding technique of power transmission shaft, and described moulding process step is:
S1, shearing wire rod;
Contracting bar bottom S2, wire rod;
S3, wire rod top contracting bar the contracting conical surface bottom wire rod;
S4, contracting top square;
S5, for the first time jumping-up top, middle part and bottom;
S6, second time jumping-up top, middle part and bottom;
Tooth bottom S7, intense beam.
Concrete further, described wire rod is through work hardening.
The mould structure of tooth bottom a kind of step S7 intense beam, comprise main form unit and punch die unit, described main form unit comprises main formwork, main mould internal mold is provided with in main formwork inner tip, cushion block in main mould is provided with in described main formwork inner bottom, main mould thimble is provided with in the middle part of cushion block in described main mould internal mold and main mould, described punch die unit comprises punch die shell, punch die thimble and punch die cushion block is provided with in described punch die shell inside, in described main mould, cushion block to comprise in main mould first cushion block in cushion block and main mould second, main mould insert is provided with in the middle of described main mould internal mold, described main mould insert inside is master cast chamber, be provided with through hole bottom described master cast chamber and run through main mould internal mold, in described main mould first, cushion block centre position arranges main mould thimble and runs through cushion block in main mould first, described main mould thimble inserts through hole, in described main mould second, in the middle of cushion block, main mould push rod is set, described main mould push rod and main mould thimble offset.
Concrete further, be provided with punch die pushing sleeve outside described punch die thimble, in the form of a ring, described punch die pushing sleeve is arranged on punch die cushion block described punch die cushion block.
Concrete further, described main formwork rear portion is provided with cushion block after main mould.
Concrete further, described punch die shell is provided with the punch die alignment pin for preventing punch die pushing sleeve from rotating.
Concrete further, described main formwork is provided with the main mould alignment pin for preventing main mould internal mold from rotating.
The invention has the beneficial effects as follows: after have employed above-mentioned technique and structure, material can refinement interiors of products crystal grain have complete metal streamline by cold-heading crimp, make the intensity of product and plasticity better, gear is not easy distortion, mechanical property improves, gear meshing section is ensured by mould, has higher precision and stability; Shaping in same die cavity, cubic running part and geared portions concentricity are good, after assembling transmission very smooth and easy, can not abnormal sound be produced, no longer adopt the processing method of milling, reduce manufacturing procedure, save material, improve working (machining) efficiency, effectively reduce production cost.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention:
Fig. 2 is the mould structure schematic diagram of present invention process step S2;
Fig. 3 is the mould structure schematic diagram of present invention process step S3;
Fig. 4 is the mould structure schematic diagram of present invention process step S4;
Fig. 5 is the mould structure schematic diagram of present invention process step S5;
Fig. 6 is the mould structure schematic diagram of present invention process step S6;
Fig. 7 is the mould structure schematic diagram of present invention process step S7.
1,3, punch die unit in figure:; 2,4 main form units; 11,31, punch die shell; 12,32, punch die thimble; 21,41, main formwork; 22,42, main mould internal mold; 23,43, cushion block in main mould; 24,44, main mould thimble; 25,45, cushion block after main mould; 33, punch die cushion block; 34, punch die pushing sleeve; 35, punch die alignment pin; 46, main mould insert; 47, main mould push rod; 48, main mould alignment pin.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is explained in detail.
A cold-heading molding technique for power transmission shaft as shown in Figure 1, described moulding process step is:
S1, shearing wire rod;
Contracting bar bottom S2, wire rod;
S3, wire rod top contracting bar the contracting conical surface bottom wire rod;
S4, contracting top square;
S5, for the first time jumping-up top, middle part and bottom;
S6, second time jumping-up top, middle part and bottom;
Tooth bottom S7, intense beam.
Described wire rod is through work hardening.
The mould structure of tooth bottom a kind of step S7 intense beam as shown in Figure 7, comprise main form unit 4 and punch die unit 3, described main form unit 4 comprises main formwork 41, main mould internal mold 42 is provided with in main formwork 41 inner tip, cushion block 43 in main mould is provided with in described main formwork 41 inner bottom, main mould thimble 44 is provided with in the middle part of described main mould internal mold 42 with cushion block 43 in main mould, described punch die unit 3 comprises punch die shell 31, punch die thimble 32 and punch die cushion block 33 is provided with in described punch die shell 31 inside, in described main mould, cushion block 43 to comprise in main mould first cushion block 432 in cushion block 431 and main mould second, main mould insert 46 is provided with in the middle of described main mould internal mold 42, described main mould insert 46 inside is master cast chamber, be provided with through hole bottom described master cast chamber and run through main mould internal mold 42, in described main mould first, cushion block 431 centre position arranges main mould thimble 44 and runs through cushion block 431 in main mould first, described main mould thimble 44 inserts through hole, in described main mould second, in the middle of cushion block 432, main mould push rod 47 is set, described main mould push rod 47 offsets with main mould thimble 44, be provided with punch die pushing sleeve 34 outside described punch die thimble 32, in the form of a ring, described punch die pushing sleeve 34 is arranged on punch die cushion block 33 described punch die cushion block 33, described main formwork 41 rear portion is provided with cushion block 45 after main mould, described punch die shell 31 is provided with the punch die alignment pin 35 for preventing punch die pushing sleeve 34 from rotating, described main formwork 41 is provided with the main mould alignment pin 48 for preventing main mould internal mold 42 from rotating.
As shown in Fig. 2 ~ Fig. 6, mould structure comprises punch die unit 1 and main form unit 2, punch die unit 1 comprises punch die shell 11 and punch die thimble 12, main form unit 2 to comprise in main formwork 21, main mould internal mold 22, main mould the composition such as cushion block 25 and main mould thimble 24 after cushion block 23, main mould, wherein cross mould to be completed by clip, all moulds are all contained on cold headers.
Punch die unit mass motion and punch die thimble pushes material enters in master cast chamber shaping in the course of the work as shown in Figure 2, main form unit is fixed on the machine, main mould thimble and main mould push rod move after forming parts, and main mould thimble plays the effect ejecting part in master cast chamber.Punch die unit mass motion in the course of the work as shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 6, material is shaping in master cast chamber and die cavity, punch die thimble pushes part and releases die cavity afterwards, main form unit is fixed on the machine, main mould thimble and main mould push rod move after forming parts, and main mould thimble plays the effect ejecting part in master cast chamber.
Punch die unit 3 mass motion in the course of the work as shown in Figure 7, punch die pushing sleeve 34 is motionless relative to punch die shell 31 under the effect of punch die cushion block 33, and after shaping completing, punch die thimble 32 moves and to be released by part; Main form unit 4 is fixed on the machine, and main mould thimble 44 and main mould push rod 47 move after forming parts, and main mould thimble 44 plays the effect ejecting part in master cast chamber.
It is emphasized that: be only preferred embodiment of the present invention above, not any pro forma restriction is done to the present invention, every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (7)
1. a cold-heading molding technique for power transmission shaft, is characterized in that, described moulding process step is:
S1, shearing wire rod;
Contracting bar bottom S2, wire rod;
S3, wire rod top contracting bar the contracting conical surface bottom wire rod;
S4, contracting top square;
S5, for the first time jumping-up top, middle part and bottom;
S6, second time jumping-up top, middle part and bottom;
Tooth bottom S7, intense beam.
2. the cold-heading molding technique of power transmission shaft according to claim 1, is characterized in that, described wire rod is through work hardening.
3. the mould structure of tooth bottom step S7 intense beam in a claim 1, comprise main form unit (4) and punch die unit (3), described main form unit (4) comprises main formwork (41), main mould internal mold (42) is provided with in main formwork (41) inner tip, cushion block (43) in main mould is provided with in described main formwork (41) inner bottom, in described main mould internal mold (42) with main mould, cushion block (43) middle part is provided with main mould thimble (44), described punch die unit (3) comprises punch die shell (31), punch die thimble (32) and punch die cushion block (33) is provided with in described punch die shell (31) inside, it is characterized in that, in described main mould, cushion block (43) to comprise in main mould first cushion block (432) in cushion block (431) and main mould second, main mould insert (46) is provided with in the middle of described main mould internal mold (42), described main mould insert (46) inside is master cast chamber, be provided with through hole bottom described master cast chamber and run through main mould internal mold (42), in described main mould first, cushion block (431) centre position arranges main mould thimble (44) and runs through cushion block (431) in main mould first, described main mould thimble (44) inserts through hole, in described main mould second, in the middle of cushion block (432), main mould push rod (47) is set, described main mould push rod (47) and main mould thimble (44) offset.
4. the mould structure of tooth bottom intense beam according to claim 3, it is characterized in that, described punch die thimble (32) outside is provided with punch die pushing sleeve (34), and in the form of a ring, described punch die pushing sleeve (34) is arranged on punch die cushion block (33) described punch die cushion block (33).
5. the mould structure of tooth bottom intense beam according to claim 3, is characterized in that, described main formwork (41) rear portion is provided with cushion block (45) after main mould.
6. the mould structure of tooth bottom intense beam according to claim 3, it is characterized in that, described punch die shell (31) is provided with the punch die alignment pin (35) for preventing punch die pushing sleeve (34) from rotating.
7. the mould structure of tooth bottom intense beam according to claim 3, it is characterized in that, described main formwork (41) is provided with the main mould alignment pin (48) for preventing main mould internal mold (42) from rotating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510768539.6A CN105251932A (en) | 2015-11-12 | 2015-11-12 | Cold heading forming process for transmission shaft and heavy extruding die structure for forming teeth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510768539.6A CN105251932A (en) | 2015-11-12 | 2015-11-12 | Cold heading forming process for transmission shaft and heavy extruding die structure for forming teeth |
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|---|---|
| CN105251932A true CN105251932A (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510768539.6A Pending CN105251932A (en) | 2015-11-12 | 2015-11-12 | Cold heading forming process for transmission shaft and heavy extruding die structure for forming teeth |
Country Status (1)
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| CN (1) | CN105251932A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106180532A (en) * | 2016-08-30 | 2016-12-07 | 苏州工业园区新凯精密五金有限公司 | The processing technique of a kind of automotive seat power transmission shaft and the mould of contracting flower tooth |
| CN106270340A (en) * | 2016-08-25 | 2017-01-04 | 苏州工业园区新凯精密五金有限公司 | A kind of cold-heading molding technique for manufacturing drive shaft and cold-heading module |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0223257B2 (en) * | 1982-04-22 | 1990-05-23 | Nippon Denso Kk | |
| EP1336443A1 (en) * | 2000-11-22 | 2003-08-20 | Kabushiki Kaisha Somic Ishikawa | Method for manufacturing arm of joint and joint |
| FR2926739A1 (en) * | 2008-01-24 | 2009-07-31 | Vallourec & Mannesmann Tubes S | Anti-weld tube shaped axle for a road vehicle, comprises steel alloy comprising carbon, manganese, sulfur, phosphorous, aluminum, silicon, molybdenum, niobium and/or vanadium, where the axle has minimum elastic limit of specified range |
| CN103192020A (en) * | 2013-03-11 | 2013-07-10 | 浙江新东方汽车零部件有限公司 | Gear shaft forming method and die adopted by same |
| CN104368744A (en) * | 2014-12-01 | 2015-02-25 | 苏州工业园区新凯精密五金有限公司 | Cold heading forming technology of automobile door lock shaft and die structure for lock shaft forming |
| CN104493061A (en) * | 2014-12-01 | 2015-04-08 | 苏州工业园区新凯精密五金有限公司 | Cold-forging technology for safety belt transmission shaft and die structure of molded transmission patterned tooth |
-
2015
- 2015-11-12 CN CN201510768539.6A patent/CN105251932A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0223257B2 (en) * | 1982-04-22 | 1990-05-23 | Nippon Denso Kk | |
| EP1336443A1 (en) * | 2000-11-22 | 2003-08-20 | Kabushiki Kaisha Somic Ishikawa | Method for manufacturing arm of joint and joint |
| FR2926739A1 (en) * | 2008-01-24 | 2009-07-31 | Vallourec & Mannesmann Tubes S | Anti-weld tube shaped axle for a road vehicle, comprises steel alloy comprising carbon, manganese, sulfur, phosphorous, aluminum, silicon, molybdenum, niobium and/or vanadium, where the axle has minimum elastic limit of specified range |
| CN103192020A (en) * | 2013-03-11 | 2013-07-10 | 浙江新东方汽车零部件有限公司 | Gear shaft forming method and die adopted by same |
| CN104368744A (en) * | 2014-12-01 | 2015-02-25 | 苏州工业园区新凯精密五金有限公司 | Cold heading forming technology of automobile door lock shaft and die structure for lock shaft forming |
| CN104493061A (en) * | 2014-12-01 | 2015-04-08 | 苏州工业园区新凯精密五金有限公司 | Cold-forging technology for safety belt transmission shaft and die structure of molded transmission patterned tooth |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270340A (en) * | 2016-08-25 | 2017-01-04 | 苏州工业园区新凯精密五金有限公司 | A kind of cold-heading molding technique for manufacturing drive shaft and cold-heading module |
| CN106180532A (en) * | 2016-08-30 | 2016-12-07 | 苏州工业园区新凯精密五金有限公司 | The processing technique of a kind of automotive seat power transmission shaft and the mould of contracting flower tooth |
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Application publication date: 20160120 |
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