CN112975301A - Hot-cold composite forging process for new energy shifting fork shaft supporting plate - Google Patents
Hot-cold composite forging process for new energy shifting fork shaft supporting plate Download PDFInfo
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- CN112975301A CN112975301A CN202110305673.8A CN202110305673A CN112975301A CN 112975301 A CN112975301 A CN 112975301A CN 202110305673 A CN202110305673 A CN 202110305673A CN 112975301 A CN112975301 A CN 112975301A
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- hot
- forging
- shifting fork
- fork shaft
- cold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a hot-cold composite forging process for a new energy shifting fork shaft support plate, which comprises the following steps of: hot extrusion; cutting; thirdly, hot extrusion is carried out again; cutting edges and punching; heat treatment; sixthly, shot blasting treatment is carried out; seventhly, cold finishing; machining. The product produced by adopting the forging process has the advantages of uniform tissue, good density, no defects of shrinkage porosity, segregation, obvious impurities, air holes, shrinkage cavities and the like, better mechanical property, better reliability of the product under complex working conditions, improvement of the processing precision of the product, reduction of the processing cost of the product, reduction of the processing production period and improvement of the production efficiency.
Description
Technical Field
The invention relates to a hot-cold composite forging forming process for an aluminum alloy shifting fork shaft supporting plate of a passenger car gearbox.
Background
The new energy aluminum alloy shifting fork shaft supporting plate is mainly applied to a passenger car EDU (electrically driven transmission) shifting fork system, is connected with a transmission case through a bolt and bears the axial force transmitted from a shifting fork shaft in the gear switching process, generally comprises a plate body 1, a bent strip-shaped platform bulge 2 is arranged on the right side of the upper end face of the plate body 1, small holes 3 are formed in the bent strip-shaped platform bulge 2, and the small holes 3 are through holes; the plate comprises a plate body 1 and is characterized in that a circular bulge 4 is respectively arranged at the left side edge of the lower end surface of the plate body 1, an inner hole 5 is arranged at the position, corresponding to the circular bulge, of the upper end surface of the plate body 1, the inner hole 5 is a blind hole, and a fine hole 6 communicated with the inner hole 5 is arranged on the end surface of the circular bulge 4; by adopting the traditional die-casting process, the product has poor tightness, poor internal structure performance, easy occurrence of defects of shrinkage porosity, segregation, inclusion, pores, shrinkage cavities and the like, poor comprehensive mechanical performance, generally lower tensile strength than 260MPa, high product processing cost and long manufacturing period.
Disclosure of Invention
Aiming at the defects of the existing die-casting manufacturing process, the invention provides a hot-cold combined forging forming process, which can improve the internal structure of a product, eliminate the defects of shrinkage porosity, segregation, obvious impurities, air holes, shrinkage cavities and the like, greatly improve the comprehensive mechanical property of the product, greatly improve the tensile strength of the product above 290Mpa through the heat treatment after forging, greatly improve the plasticity and toughness of the product, simultaneously improve the processing precision of the product, reduce the processing cost of the product, reduce the processing production period and improve the production efficiency.
The invention is realized by the following technical scheme:
the hot-cold composite forging process for the new-energy shifting fork shaft supporting plate is characterized by comprising the following steps of: hot extrusion: hot-extruding the aluminum cast bar into a deep blank with the cross section shape matched with the support plate of the new energy shifting fork shaft by a hydraulic machine and a special extrusion die at 450-470 ℃, and naturally cooling to room temperature; cutting: sawing the deep blank into a plurality of forgings with the thickness larger than that of the new energy shifting fork shaft support plate; thirdly, hot extrusion again: heating the forging piece to a forging temperature, performing hot extrusion forming at 450-470 ℃ by adopting a hot die forging press, a hydraulic press or other forging equipment and a special extrusion die to form a plate body and a bent strip-shaped platform bulge, a circular bulge and an inner hole which are arranged on the plate body, and cooling to room temperature; cutting edges and punching: respectively trimming and punching fine holes on the blank formed by the finish forging through a mechanical press and a special trimming die; heat treatment: solid solution and aging treatment, wherein the solid solution is heating to 520-540 ℃, the water cooling is carried out after the heat preservation is carried out for 60 minutes, the aging is heating to 160-180 ℃, the heat preservation is carried out for 10 hours, and the product is taken out of the furnace and cooled; sixthly, shot blasting treatment: shot blasting the heat-treated blank in a shot blasting machine; and (c) cold finishing: performing cold finishing on the end face and the inner hole side face of the blank subjected to shot blasting treatment by using a hydraulic machine and a special cold finishing die; machining: and (5) machining to form a small hole by taking the inner hole after cold finishing as a reference.
The hot extrusion step again comprises the steps of pre-forging and finish forging, wherein the plate body is formed by pre-forging, the bent strip-shaped platform bulges are arranged on the plate body, and the circular bulges and the inner holes are formed by finish forging.
Compared with the prior art, the invention has the following beneficial effects:
the product produced by adopting the forging process has the advantages of uniform tissue, good density, no defects of shrinkage porosity, segregation, obvious impurities, air holes, shrinkage cavities and the like, better mechanical property, better reliability of the product under complex working conditions, improvement of the processing precision of the product, reduction of the processing cost of the product, reduction of the processing production period and improvement of the production efficiency.
Drawings
Fig. 1 is a top view of a new energy fork shaft support plate according to an embodiment of the present invention;
fig. 2 is a bottom view of the new energy fork shaft support plate according to the embodiment of the present invention;
fig. 3 is a flow chart of a blank deformation process according to an embodiment of the present invention.
Number in the figure: 1. Plate body, 2, crooked bar platform are protruding, 3, aperture, 4, circular arch, 5, hole, 6, pore.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples with reference to the accompanying drawings.
Example (b): referring to fig. 1 and 2, the new energy shifting fork shaft supporting plate comprises a plate body 1, wherein a bent strip-shaped platform bulge 2 is arranged on the right side of the upper end face of the plate body 1, small holes 3 are formed in the bent strip-shaped platform bulge 2, and the small holes 3 are through holes; the lower terminal surface left side edge of plate body 1 respectively be provided with a circular arch 4, the upper end of plate body 1 correspond circular arch department and be provided with hole 5, hole 5 be the blind hole, circular arch 4's terminal surface on be provided with the communicating pore 6 of hole 5.
Referring to fig. 3, the hot-cold composite forging process for the new energy shifting fork shaft support plate is characterized by comprising the following steps: hot extrusion: hot-extruding the aluminum cast bar into a deep blank with the cross section shape matched with the support plate of the new energy shifting fork shaft by a hydraulic machine and a special extrusion die at 450-470 ℃, and naturally cooling to room temperature; cutting: sawing the deep blank into a plurality of forgings with the thickness larger than that of the new energy shifting fork shaft support plate; thirdly, hot extrusion again: heating the forging piece to a forging temperature, performing hot extrusion pre-forging and finish forging forming at 450-470 ℃ by adopting a hot die forging press, a hydraulic press or other forging equipment and a special extrusion die, forming the plate body 1 and the bent strip-shaped platform bulge 2 on the plate body 1 by the pre-forging forming, forming the circular bulge 4 and the inner hole 5 by the finish forging forming, and cooling to room temperature; cutting edges and punching: respectively trimming and punching a fine hole 6 on the blank formed by final forging by a mechanical press and a special trimming die; heat treatment: solid solution and aging treatment, wherein the solid solution is heating to 520-540 ℃, the water cooling is carried out after the heat preservation is carried out for 60 minutes, the aging is heating to 160-180 ℃, the heat preservation is carried out for 10 hours, and the product is taken out of the furnace and cooled; sixthly, shot blasting treatment: shot blasting the heat-treated blank in a shot blasting machine; and (c) cold finishing: cold finishing the end face and the side face of the inner hole 5 of the blank after shot blasting treatment by a hydraulic machine and a special cold finishing die, so that the processing procedures are reduced, the manufacturing period is shortened, and the subsequent processing positioning precision is improved; machining: processing small holes 3 at other positions by using the inner hole 5 after cold finishing as a reference through a milling machine and a special fixture, and ensuring the position degree of each hole; ninthly, cleaning and packaging: and an ultrasonic cleaning process is adopted, so that the requirement on the cleanliness of the product is ensured.
The embodiments are only for the purpose of facilitating understanding of the technical solutions of the present invention, and do not constitute a limitation to the scope of the present invention, and any simple modification, equivalent change and modification made to the above solutions without departing from the contents of the technical solutions of the present invention or the technical spirit of the present invention still fall within the scope of the present invention.
Claims (2)
1. The hot-cold composite forging process for the new-energy shifting fork shaft supporting plate is characterized by comprising the following steps of: hot extrusion: hot-extruding the aluminum cast bar into a deep blank with the cross section shape matched with the support plate of the new energy shifting fork shaft by a hydraulic machine and a special extrusion die at 450-470 ℃, and naturally cooling to room temperature; cutting: sawing the deep blank into a plurality of forgings with the thickness larger than that of the new energy shifting fork shaft support plate; thirdly, hot extrusion again: heating the forging to a forging temperature, performing hot extrusion forming at 450-470 ℃ by adopting a hot die forging press, a hydraulic press or other forging equipment and a special extrusion die to form a plate body (1) and a bent strip-shaped platform bulge (2), a circular bulge (4) and an inner hole (5) which are arranged on the plate body (1), and cooling to room temperature; cutting edges and punching: respectively trimming and punching a fine hole (6) on the blank formed by final forging by a mechanical press and a special trimming die; heat treatment: solid solution and aging treatment, wherein the solid solution is heating to 520-540 ℃, the water cooling is carried out after the heat preservation is carried out for 60 minutes, the aging is heating to 160-180 ℃, the heat preservation is carried out for 10 hours, and the product is taken out of the furnace and cooled; sixthly, shot blasting treatment: shot blasting the heat-treated blank in a shot blasting machine; and (c) cold finishing: performing cold finishing on the end face and the inner hole side face of the blank subjected to shot blasting treatment by using a hydraulic machine and a special cold finishing die; machining: and machining to form the small hole (3) by taking the inner hole (5) after cold finishing as a reference.
2. The hot-cold composite forging process for the new energy shifting fork shaft support plate according to claim 1, wherein the hot-cold composite forging process comprises the following steps: the hot extrusion step again comprises preforging and finish forging, wherein the preforging forms a plate body (1) and a bent strip-shaped platform bulge (2) on the plate body (1), and the finish forging forms a circular bulge (4) and an inner hole (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110305673.8A CN112975301A (en) | 2021-03-23 | 2021-03-23 | Hot-cold composite forging process for new energy shifting fork shaft supporting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110305673.8A CN112975301A (en) | 2021-03-23 | 2021-03-23 | Hot-cold composite forging process for new energy shifting fork shaft supporting plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112975301A true CN112975301A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110305673.8A Withdrawn CN112975301A (en) | 2021-03-23 | 2021-03-23 | Hot-cold composite forging process for new energy shifting fork shaft supporting plate |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB937927A (en) * | 1962-08-23 | 1963-09-25 | Kaiser Aluminium Chem Corp | Improvements in or relating to the forging of aluminium alloys |
| CN102019542A (en) * | 2010-11-08 | 2011-04-20 | 大丰市中德精锻件有限公司 | Processing process of profiled blind hole flange type inner ball cage fine forging piece |
| CN104493442A (en) * | 2014-12-04 | 2015-04-08 | 汪超 | Automobile generator claw pole and manufacturing process thereof |
| CN108127356A (en) * | 2017-12-17 | 2018-06-08 | 江苏威鹰机械有限公司 | Auto gearbox 7DCT ratchets and its manufacturing process |
| CN108890218A (en) * | 2018-05-16 | 2018-11-27 | 江苏理工学院 | A kind of high strength heat resistant alloy forge piece manufacturing process |
| CN110076523A (en) * | 2019-04-04 | 2019-08-02 | 苏州胜利精密制造科技股份有限公司 | A kind of manufacturing method of laptop case |
-
2021
- 2021-03-23 CN CN202110305673.8A patent/CN112975301A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB937927A (en) * | 1962-08-23 | 1963-09-25 | Kaiser Aluminium Chem Corp | Improvements in or relating to the forging of aluminium alloys |
| CN102019542A (en) * | 2010-11-08 | 2011-04-20 | 大丰市中德精锻件有限公司 | Processing process of profiled blind hole flange type inner ball cage fine forging piece |
| CN104493442A (en) * | 2014-12-04 | 2015-04-08 | 汪超 | Automobile generator claw pole and manufacturing process thereof |
| CN108127356A (en) * | 2017-12-17 | 2018-06-08 | 江苏威鹰机械有限公司 | Auto gearbox 7DCT ratchets and its manufacturing process |
| CN108890218A (en) * | 2018-05-16 | 2018-11-27 | 江苏理工学院 | A kind of high strength heat resistant alloy forge piece manufacturing process |
| CN110076523A (en) * | 2019-04-04 | 2019-08-02 | 苏州胜利精密制造科技股份有限公司 | A kind of manufacturing method of laptop case |
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Application publication date: 20210618 |