CN217784052U - Novel structure of flange yoke pre-forging piece - Google Patents
Novel structure of flange yoke pre-forging piece Download PDFInfo
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- CN217784052U CN217784052U CN202221567165.3U CN202221567165U CN217784052U CN 217784052 U CN217784052 U CN 217784052U CN 202221567165 U CN202221567165 U CN 202221567165U CN 217784052 U CN217784052 U CN 217784052U
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Abstract
The flange fork pre-forging piece new structure comprises a disc portion and two fork lugs arranged on the left side and the right side of the top of the disc portion, a weight reduction groove is pre-arranged in the middle of the bottom surface of the disc portion in the left-right direction, four raised key blocks are arranged on the bottom surface of the disc portion, and each key block is in transition through an inclined plane between one side of the adjacent fork lug and the side surface of the disc portion. The inclination of the side face of the disc part on one side close to the fork lug is 15 degrees, and the lower part of the side face of the disc part is transited with the upper part of the inclined plane through an arc surface with the radius of 10 mm. The utility model discloses a change preforging module makes the blank of preforging more easily flow and fill the type in the disk key piece department of finish forging at the shape of disk key piece department of forging in-process, is difficult to form defects such as starved material and folding to place the operation degree of difficulty of blank and reduce the forging rejection rate when reducing preforging. The local burrs are reduced, the material utilization rate is improved, and the production cost is reduced. Meanwhile, the influence of abrasion of the pre-forging die on the final forging piece at the disc key block is reduced, and the phenomenon that the overall service life of the pre-forging die is shortened due to local abrasion is avoided.
Description
Technical Field
The utility model belongs to the technical field of the automotive industry, concretely relates to flange fork forge piece new construction in advance.
Background
The structure of the transmission shaft flange yoke pre-forging piece designed according to the traditional method is shown in figures 1 and 2, namely, a blank is preformed once according to the shape of a final forging piece, the flange yoke pre-forging piece comprises a disc part 1 and two fork lugs 2 arranged on the left side and the right side of the top of the disc part 1, a weight-reducing groove 3 is preset in the middle of the bottom surface of the disc part 1 along the left-right direction, and four raised key blocks 4 are arranged on the bottom surface of the disc part 1. In forging a flange yoke forging, a cylindrical bar stock is used as a forging blank. This pre-forging method has the following problems:
1) As can be seen from fig. 1 and 2, when the final forged piece is designed into a pre-forging die, a larger step plane 5 is arranged on one side of the key block 4 close to the fork lug 2, the size of the key block 4 in the length direction is 61.6mm, the length from one side of the step plane 4 close to the fork lug 2 to the center line of the key block 4 is 48.5mm, the inclination of the side face of the disc part 1 close to the fork lug 2 is 10 °, and the side face of the disc part 1 and the step plane 4 are in transition through an arc surface with the radius R of 10 mm. Therefore, an irregular shape is easily formed at the position in the process of forging by using a cylindrical bar stock, so that the defects of folding or material shortage and the like are formed at the position of the key block 4 on the bottom surface of the disc part 1 of the final forged piece, the unqualified flange fork forged piece is caused, and waste products are generated;
2) When the pre-forging die designed according to the traditional method is used, in order to reduce the defects of folding, material shortage and the like of the final forging piece at the four key blocks 4, workers need to symmetrically place blank bar stocks in a cavity of the pre-forging die, so that the pre-forging piece is uniformly molded at the four key blocks 4 on the bottom surface of the disc part 1, namely the four key blocks 4 are the same in size and structure. This has higher requirements on the operating level of the workers and also increases the labor intensity of the workers.
3) In the forging process, after the preforging die cavity generates slight abrasion deformation at the four key blocks 4 on the bottom surface of the disc part 1, the final forging piece easily generates folding defects on the disc part 1, so that the whole preforging die needs to be renovated and repaired, the whole service life of the preforging die is shortened, the production efficiency is reduced, and the production cost is also improved.
4) In order to ensure the finished product rate of the forge piece, workers can upset the blank to be shorter according to experience when upsetting the blank, so that the difference between the sectional area of the blank and the sectional area of a die cavity is increased, partial burrs are larger during finish forging, the material utilization rate is reduced, and the production cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the weak point among the prior art, provide one kind and be difficult for folding or lack the material, easily shaping, reduce local unedged flange fork preforging spare new construction in four key block positions.
In order to solve the technical problem, the utility model adopts the following technical scheme: the flange fork pre-forging piece new structure comprises a disc part and two fork lugs arranged on the left side and the right side of the top of the disc part, wherein a lightening groove is preset in the middle of the bottom surface of the disc part along the left-right direction, four raised key blocks are arranged on the bottom surface of the disc part, and each key block is in transition between one side close to the fork lug and the side surface of the disc part through an inclined plane.
The slope of the inclined plane is 45 degrees, and the vertical projection of the inclined plane from the disc part to the key block is 8mm.
The inclination of the side face of the disc part on one side close to the fork lug is 15 degrees, and the lower part of the side face of the disc part is transited with the upper part of the inclined plane through an arc surface with the radius of 10 mm.
The size of the key block along the length direction is 63.8mm, the circular arc radiuses of the key block at two edges close to the fork ears are respectively 13mm and 15mm, the 15mm edge is positioned at the outer side of the 13mm edge, and the circular arc radiuses of the key block at two edges far away from the fork ears are both 11mm.
Adopt above-mentioned technical scheme, the utility model discloses four key blocks departments to the dish portion bottom surface have carried out structural improvement to reach better effect. The key block surface and the disc part side face of the fork lug side are connected by using the large-inclination inclined plane, a wider step plane at the original preforging piece key block is eliminated, abrasion to the corresponding part of a preforging die cavity is reduced, and then the fillet radius of two edges of the key block close to the fork lug is increased to 13mm and 15mm, so that the key block of the preforging piece is more smooth.
The original symmetrical key block shape and the design that the width size of the pre-forging key block is smaller than the final forging size are changed at the key block, and the width size of the key block on the side close to the fork lug, which is easy to generate defects such as material shortage and folding, is increased by 2.2mm and is larger than the final forging size. The size of the disk part of the pre-forging piece on the fork lug side is reduced, the inclination of the disk part on the fork lug side is increased to 15 degrees from the original 10 degrees, and the shape of the pre-forging piece on the fork lug side is more gentle.
In summary, by changing the shape of the preforging module at the disk key block, the blank of the preforging piece is easier to flow and fill at the disk key block of the finish forging piece in the forging process, and the defects of material shortage, folding and the like are not easy to form, so that the operation difficulty of placing the blank in the preforging process is reduced, and the rejection rate of the forging piece is reduced. The sectional area distribution of the blank is close to that of the final forging piece, so that local burrs are reduced, the material utilization rate is improved, and the production cost is reduced. Meanwhile, the influence of abrasion of the pre-forging die on the disc key block on a final forging piece is reduced, and the reduction of the whole service life of the pre-forging die due to local abrasion is avoided.
Drawings
FIG. 1 is a schematic structural view of a prior art drive shaft flange yoke pre-forging;
FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic structural view of the improved rear drive shaft flange yoke pre-forging of the present invention;
fig. 4 is a sectional view taken along line B-B in fig. 1.
Detailed Description
As shown in fig. 3 and 4, the new structure of the flange yoke pre-forging piece of the present invention comprises a disc portion 1 and two yoke lugs 2 arranged on the left and right sides of the top of the disc portion 1, wherein weight reduction grooves 3 are preset in the middle of the bottom surface of the disc portion 1 along the left and right directions, four raised key blocks 4 are arranged on the bottom surface of the disc portion 1, and each key block 4 is transited between one side of the yoke lug 2 and the side surface of the disc portion 1 through an inclined plane 6.
The slope of the inclined surface 6 is 45 °, and the vertical projection of the inclined surface 6 from the disk portion 1 to the key block 4 is 8mm (41 mm-33mm =8mm in the drawing).
The inclination of the side surface of the disc part 1 on one side close to the fork lug 2 is 15 degrees, and the lower part of the side surface of the disc part 1 is transited with the upper part of the inclined surface 6 through a circular arc surface with the radius of 10 mm.
The size of the key block 4 in the length direction is 63.8mm, the circular arc radiuses of the key block 4 at two edges close to the fork lugs 2 are respectively 13mm and 15mm, the 15mm edge is positioned outside the 13mm edge, and the circular arc radiuses of the key block 4 at two edges far away from the fork lugs 2 are both 11mm.
The utility model discloses four key blocks 4 departments to 1 bottom surfaces of dish portion have carried out the institutional advancement to reach better effect. Firstly, the surface of the key block 4 is connected with the side surface of the disc part 1 on the side of the fork lug 2 by using the inclined surface 6 with large inclination, the wider step plane at the original key block 4 of the pre-forging piece is eliminated, the abrasion to the corresponding part of a cavity of the pre-forging die is reduced, and then the fillet radius of two edges of the key block 4 close to the fork lug 2 is increased to 13mm and 15mm, so that the key block 4 of the pre-forging piece is more smooth.
The original shape of the symmetrical key block 4 and the design that the width size of the pre-forging key block 4 is smaller than the final forging size are changed at the key block 4, and the width size of the key block 4 on the side close to the fork lug 2, which is easy to generate defects such as material shortage, folding and the like, is increased by 2.2mm and is larger than the final forging size. The size of the disc part 1 of the preforging piece on the fork lug 2 side is reduced, the inclination of the disc part 1 on the fork lug 2 side is increased to 15 degrees from the original 10 degrees, and the shape of the preforging piece on the fork lug 2 side is more gentle.
The utility model discloses forge a batch back in the workshop, practice proves: the material utilization rate of the forging is improved by more than 0.5%; the production time of single forgings is shortened, the production of each shift is increased from 700 forgings to 800 forgings, and the production efficiency is improved by 14 percent; the rejection rate is reduced by 3 percent.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any form, and all of the technical matters of the present invention belong to the protection scope of the present invention to any simple modifications, equivalent changes and modifications made by the above embodiments.
Claims (4)
1. The flange fork pre-forging new structure comprises a disc part and two fork lugs arranged on the left side and the right side of the top of the disc part, wherein weight reduction grooves are preset in the middle of the bottom surface of the disc part along the left-right direction, and four convex key blocks are arranged on the bottom surface of the disc part, and the flange fork pre-forging new structure is characterized in that: each key block is in a transition between one side close to the fork ear and the side surface of the disk part through a bevel.
2. The flange yoke blocker new structure as claimed in claim 1, wherein: the slope of the ramp is 45 deg., and the vertical projection of the ramp is 8mm from the disk portion to the key block.
3. The flange yoke blocker new structure as claimed in claim 1 or 2, wherein: the inclination of the side face of the disc part close to one side of the fork lug is 15 degrees, and the lower part of the side face of the disc part is transited with the upper part of the inclined plane through an arc surface with the radius of 10 mm.
4. The flange yoke blocker new structure as claimed in claim 1 or 2, wherein: the size of the key block along the length direction is 63.8mm, the circular arc radiuses of the key block at two edges close to the fork ears are respectively 13mm and 15mm, the 15mm edge is positioned at the outer side of the 13mm edge, and the circular arc radiuses of the key block at two edges far away from the fork ears are both 11mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221567165.3U CN217784052U (en) | 2022-06-22 | 2022-06-22 | Novel structure of flange yoke pre-forging piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221567165.3U CN217784052U (en) | 2022-06-22 | 2022-06-22 | Novel structure of flange yoke pre-forging piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217784052U true CN217784052U (en) | 2022-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221567165.3U Active CN217784052U (en) | 2022-06-22 | 2022-06-22 | Novel structure of flange yoke pre-forging piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217784052U (en) |
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2022
- 2022-06-22 CN CN202221567165.3U patent/CN217784052U/en active Active
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