CN220329873U - Novel transmission shaft spline shaft pre-forging male die - Google Patents
Novel transmission shaft spline shaft pre-forging male die Download PDFInfo
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- CN220329873U CN220329873U CN202321807955.9U CN202321807955U CN220329873U CN 220329873 U CN220329873 U CN 220329873U CN 202321807955 U CN202321807955 U CN 202321807955U CN 220329873 U CN220329873 U CN 220329873U
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- reaming
- boss
- forging
- male die
- transmission shaft
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- 238000005242 forging Methods 0.000 title claims abstract description 76
- 230000005540 biological transmission Effects 0.000 title claims abstract description 19
- 238000007493 shaping process Methods 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model provides a novel transmission shaft spline shaft forges terrace die in advance, includes integrated structure and with connecting direction portion and the shaping portion of central line, shaping lower terminal surface an organic whole is established and is the reaming boss of round platform form, and the reaming boss has same central line with the shaping portion, and the reaming boss excircle reduces gradually from last down, and reaming boss maximum diameter is less than the diameter of shaping portion. By changing the shape of the pre-forging male die, the cylindrical bar can be forged into an inner shape when in pre-forging forming, the final forging forming force is reduced, and the service life of a final forging male die is prolonged; meanwhile, the reduction of final forging forming force can also reduce burrs, thereby reducing the weight of blanks and the production cost.
Description
Technical Field
The utility model belongs to the technical field of automobile industry, and particularly relates to a novel transmission shaft spline shaft pre-forging male die.
Background
With the continuous development of the automobile industry, the proportion of automobile parts in the forging industry is continuously improved, and particularly, the automobile transmission parts have higher requirements on the forging technology level. The spline shaft of the transmission shaft is used as a main part of the transmission shaft, and the optimization of the pre-forging structure can improve the service life of a die and reduce the burrs of the forging and the production energy consumption of a unit forging.
The forging of the spline shaft of the transmission shaft comprises two working procedures of pre-forging and final-forging. The existing pre-forging male die adopted in the pre-forging process is a novel pre-forging male die for a transmission shaft spline shaft, which is disclosed in patent number ZL202221582662.0, and comprises a connecting guide part 5 and a forming part 6 which are of an integrated structure, wherein a conical shallow groove 7 with an open bottom and thin upper part and thick lower part is arranged on the lower end surface of the forming part 6, and the central line of the conical shallow groove 7 is overlapped with the axis of the forming part 6. The depth of the conical shallow groove 7 is 5mm. The included angle between the conical generatrix of the conical shallow groove 7 and the lower end face of the forming part 6 is 25 degrees. The circle of the lower port of the conical shallow groove 7 and the outer circle of the forming part 6 are concentric circles, the distance between the two concentric circles is 2-6mm, and the pre-forging male die of the structure has the following problems:
1) The pre-forging male die only plays a role of upsetting the blank, and the blank is not uniformly reamed and distributed, so that the final forging forming force is large, and the problems of high loss and low service life of the final forging male die are caused.
2) The pre-forging piece formed by the pre-forging male die has the problems of long burrs at the end face of the large head and wide and thick burrs at the die closing positions of the upper and lower final forging female dies, and almost every piece needs to be subjected to burr grinding.
Disclosure of Invention
The utility model provides a novel transmission shaft spline shaft pre-forging male die for solving the defects in the prior art; by changing the shape of the pre-forging male die, the head part of the cylindrical blank can be forged into an inner shape when in pre-forging forming, so that the final forging forming force is reduced, and the service life of a final forging male die is prolonged; meanwhile, the reduction of final forging forming force can also reduce burrs, thereby reducing the weight of blanks and the production cost.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a novel transmission shaft spline shaft forges terrace die in advance, includes integrated structure and with connecting direction portion and the shaping portion of central line, shaping lower terminal surface an organic whole is established and is the reaming boss of round platform form, and the reaming boss has same central line with the shaping portion, and the reaming boss excircle reduces gradually from last down, and reaming boss maximum diameter is less than the diameter of shaping portion.
The diameter of the forming part is 112.7mm, the thickness of the reaming boss is 20mm, the maximum diameter of the reaming boss is 78mm, and the minimum diameter of the reaming boss is 50mm.
The conical surface of the reaming boss is in transition with the lower end surface of the forming part through a concave arc surface, and the radius of the concave arc surface is 8mm.
The conical surface of the forming part is in transition with the upper end surface of the reaming boss through a convex arc surface, and the radius of the convex arc surface is 20mm.
By adopting the technical scheme, the utility model has the following beneficial effects:
when the three-dimensional model of the pre-forging male die is processed, the internal shape size of the forging piece is increased at the lower end of the forming part of the pre-forging male die, and meanwhile, the size value of the pre-forging male die is finally determined through multiple modification of the pre-forging male die and simulation forming processes according to the structure of the forging piece. By using the pre-forging male die, a blank can be preliminarily forged into a pre-forging piece, and the end face of the pre-forging piece is provided with a groove with an opening diameter of 78mm, a depth of 20mm and a taper. Therefore, during finish forging forming, the finish forging male die contacts with the groove of the pre-forging piece, and has a force for expanding and pushing the pre-forging piece outwards, so that the material is easier to fill the cavity, the finish forging forming force is smaller, burrs like wings of an airplane cannot appear at the die assembly positions of the two female dies in the finish forging process, the burr grinding proportion of workers is effectively reduced, meanwhile, the blanking weight is reduced, and the cost is reduced. And during final forging, the rear end face of the final forging female die in the die cavity is filled first, so that the condition that the rear end face is not fully filled can be effectively avoided, and the yield of the forging is improved. The structures of the concave arc at the upper part and the convex arc at the upper part of the reaming boss avoid damaging the die due to larger stress generated during pre-forging, and are convenient for demoulding. Parameters such as diameter, thickness, radius of arc surface and the like of the reaming boss are all optimized choices in the testing process.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
As shown in fig. 1, the novel transmission shaft spline shaft pre-forging male die comprises a connecting guide part 5 and a forming part 6 which are of an integral structure and have the same central line, a round-table-shaped reaming boss 1 is integrally arranged on the lower end surface of the forming part 6, the reaming boss 1 and the forming part 6 have the same central line, the outer circle of the reaming boss 1 is gradually reduced from top to bottom, and the maximum diameter of the reaming boss 1 is smaller than the diameter of the forming part 6.
The diameter of the forming part 6 is 112.7mm, the thickness of the reaming boss 1 is 20mm, the maximum diameter of the reaming boss 1 is 78mm, and the minimum diameter of the reaming boss 1 is 50mm.
The conical surface of the reaming boss 1 is in transition with the lower end surface of the forming part 6 through a concave arc surface 2, and the radius of the concave arc surface 2 is 8mm.
The conical surface of the forming part 6 is in transition with the upper end surface of the reaming boss 1 through a convex arc surface 3, and the radius of the convex arc surface 3 is 20mm.
When the three-dimensional model of the pre-forging male die is processed, the internal shape size of the forging piece is increased at the lower end of the forming part 6 of the pre-forging male die, and meanwhile, the size value of the pre-forging male die is finally determined through multiple modification of the pre-forging male die and simulation forming processes according to the structure of the forging piece. By using the pre-forging male die, a blank can be preliminarily forged into a pre-forging piece, and the end face of the pre-forging piece is provided with a groove with an opening diameter of 78mm, a depth of 20mm and a taper. Therefore, during finish forging forming, the finish forging male die contacts with the groove of the pre-forging piece, and has a force for expanding and pushing the pre-forging piece outwards, so that the material is easier to fill the cavity, the finish forging forming force is smaller, burrs like wings of an airplane cannot appear at the die assembly positions of the two female dies in the finish forging process, the burr grinding proportion of workers is effectively reduced, meanwhile, the blanking weight is reduced, and the cost is reduced. And during final forging, the rear end face of the final forging female die in the die cavity is filled first, so that the condition that the rear end face is not fully filled can be effectively avoided, and the yield of the forging is improved. The structures of the concave arc at the upper part and the convex arc at the upper part of the reaming boss 1 avoid the damage to the die caused by larger stress generated during pre-forging, and are convenient for demoulding. Parameters such as diameter, thickness, radius of arc surface and the like of the reaming boss 1 are all optimized choices in the testing process.
Practice proves that after the novel pre-forging male die structure is used:
(1) The material utilization rate of the forging is improved by more than 1 percent;
(2) The burr grinding proportion of the forge piece is reduced, the original almost full grinding is reduced to 5 percent, the grinding is required, and the proportion is reduced by 95 percent;
(3) The rejection rate is reduced by 1.5%;
(4) The service life of the die is prolonged;
(5) The transmission shaft spline shaft after the improvement of the whole production process is synthesized saves 5 tons of steel and 30000 yuan each year. The above is only an example of a certain kind of transmission shaft spline shaft, and 4 kinds of transmission shaft spline shafts are used by our company after improvement, so that the production cost can be reduced for the company every year: about 20 ten thousand yuan.
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present utility model, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present utility model are all included in the scope of protection of the technical solution of the present utility model.
Claims (4)
1. The utility model provides a novel transmission shaft spline shaft forges terrace die in advance, includes integrated into one piece structure and with connecting guide part and shaping portion of central line, its characterized in that: the lower end face of the forming part is integrally provided with a reaming boss in a round table shape, the reaming boss and the forming part are provided with the same central line, the excircle of the reaming boss is gradually reduced from top to bottom, and the maximum diameter of the reaming boss is smaller than the diameter of the forming part.
2. The novel transmission shaft spline shaft pre-forging male die according to claim 1, wherein: the diameter of the forming part is 112.7mm, the thickness of the reaming boss is 20mm, the maximum diameter of the reaming boss is 78mm, and the minimum diameter of the reaming boss is 50mm.
3. The novel transmission shaft spline shaft pre-forging male die according to claim 2, wherein: the conical surface of the reaming boss is in transition with the lower end surface of the forming part through a concave arc surface, and the radius of the concave arc surface is 8mm.
4. A novel transmission shaft spline shaft pre-forging punch according to claim 2 or 3, wherein: the conical surface of the forming part is in transition with the upper end surface of the reaming boss through a convex arc surface, and the radius of the convex arc surface is 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321807955.9U CN220329873U (en) | 2023-07-11 | 2023-07-11 | Novel transmission shaft spline shaft pre-forging male die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321807955.9U CN220329873U (en) | 2023-07-11 | 2023-07-11 | Novel transmission shaft spline shaft pre-forging male die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220329873U true CN220329873U (en) | 2024-01-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321807955.9U Active CN220329873U (en) | 2023-07-11 | 2023-07-11 | Novel transmission shaft spline shaft pre-forging male die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220329873U (en) |
-
2023
- 2023-07-11 CN CN202321807955.9U patent/CN220329873U/en active Active
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