CN215824166U - New structure of finish forging die for transmission shaft flange yoke - Google Patents

New structure of finish forging die for transmission shaft flange yoke Download PDF

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Publication number
CN215824166U
CN215824166U CN202121274921.9U CN202121274921U CN215824166U CN 215824166 U CN215824166 U CN 215824166U CN 202121274921 U CN202121274921 U CN 202121274921U CN 215824166 U CN215824166 U CN 215824166U
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pressing block
die
cavity
forging die
forging
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丁圣杰
张恒
安伟浩
张军
宋航
田鹏
吴会英
时利娟
胡卫华
李广宇
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Xuchang Yuandong Drive Shaft Co Ltd
Xuchang Zhongxing Forging Co Ltd
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Xuchang Yuandong Drive Shaft Co Ltd
Xuchang Zhongxing Forging Co Ltd
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Abstract

The novel structure of the final forging die for the flange yoke of the transmission shaft comprises an upper forging die and a lower forging die, wherein the lower surface of the upper forging die is provided with a disc upper half cavity, and the left side and the right side of the disc upper half cavity are respectively provided with a left pressing block and a right pressing block which have the same structure and are bilaterally symmetrical; the distance between the front side surface of the left pressing block and the rear side surface of the left pressing block is gradually increased from right to left, the front side surface of the left pressing block and the rear side surface of the left pressing block are symmetrically arranged front and back relative to the center of the upper half cavity of the disc part, and the distance between the front side surface of the right pressing block and the rear side surface of the right pressing block is gradually increased from left to right. The utility model improves the service life of the die of the flange yoke and the quality of the forged piece, reduces the production process cost of the flange yoke, improves the reliability of trimming and ensures uniform consistency of the forged piece, avoids the generation of a wavy surface in a die cavity of the die, and also avoids the situation that the die parting position of the forged piece is folded due to metal backflow.

Description

New structure of finish forging die for transmission shaft flange yoke
Technical Field
The utility model belongs to the field of automobile part manufacturing, and particularly relates to a novel structure of a finish forging die for a transmission shaft flange yoke.
Background
The forging process of the transmission shaft flange fork forging belongs to open die forging, namely flash forging, the existing finish forging die comprises an upper forging die 20 shown in figure 1 and a lower forging die 21 shown in figure 2, a disc upper half cavity 10 is arranged on the lower surface of the upper forging die 20, and a left pressing block 11 and a right pressing block 12 which are identical in structure are respectively arranged on the left side and the right side of the disc upper half cavity 10; the upper surface of a lower forging die 21 is provided with a left fork cavity 13 and a right fork cavity 14 which are bilaterally symmetrical, a disc lower half cavity 15 which is vertically corresponding to the disc upper half cavity 10 is arranged above the left fork cavity 13 and the right fork cavity 14, the left side of the left fork cavity 13 is provided with a left indent 16 which is matched with the left pressing block 11 in shape, the right side of the right fork cavity 14 is provided with a right indent 17 which is matched with the right pressing block 12 in shape, and the front side and the rear side of the left pressing block 11 and the right pressing block 12 are both vertical to a vertical plane where a center line between the two fork cavities is located; in order to meet the forming requirement of the forging piece, flash bins are designed on parting surfaces between the lower surface of the upper forging die 20 and the upper surface of the lower forging die 21, between the left pressing block 11 and the left pressure groove 16 and between the right pressing block 12 and the right pressure groove 17, so that the resistance of metal flowing out of a die cavity can be increased, and the die cavity is forced to be filled with the metal; accommodating excess metal; and the flash plays a role in buffering during forging, so that the striking of the upper die and the lower die is weakened, and the die is prevented from collapsing and cracking. The flange fork forging flash structure which is formed by adopting the existing terminal die terminal is shown in figures 3 and 4, and comprises a front plane flash 2 and a rear plane flash 3 which are connected with a disc part 1, and a side plane flash 5, a front vertical flash 6 and a rear vertical flash 7 which are connected with the outer sides of two fork ear parts 4, wherein the front plane flash 2, the rear plane flash 3 and the side plane flash 5 are all parallel to the horizontal plane, the planes of the front vertical flash 6 and the rear vertical flash 7 are all vertical to the center line between the two fork ear parts 4, a plane is formed between the flash surface of the forging after die division and a die cavity body, and no separation or step is arranged between the two surfaces, as shown in a part a in fig. 1, the left side of the dotted line is a fork ear part 4 of the forging, the right side of the dotted line is a front vertical flash 6, and the front side of the fork ear part 4 and the front vertical flash 6 are located on the same plane, which causes the following problems:
firstly, the wear degrees of a left fork cavity 13 and a right fork cavity 14 corresponding to a fork lug 4 at a position A in the drawing 1 and a pressing block corresponding to a front vertical flash 6 and a pressing groove corresponding surface are inconsistent, after a finish forging end die is worn, the die cavity at a dotted line at the position A becomes a wavy surface, the surface quality of a corresponding forged piece does not meet the requirements of customers, and the forged piece is scrapped;
secondly, after the finish forging die is worn, the resistance of redundant blanks discharged out of the die cavity is different, and part of metal flows out of the die cavity to increase the resistance, so that metal backflow is caused, and the metal at the die parting position of the forge piece can be folded;
the utility model discloses a forging piece, including the fork ear 4 front side and the rear side, the side cut terrace die downstream contacts with the forging, the side cut terrace die can have certain oscillating quantity in the process of downstream, and 4 front sides of fork ear and the preceding vertical overlap 6 of forging back forging are located the coplanar, 4 rear sides of fork ear and the 7 same planes of the vertical overlap in back, this kind of structure makes the forging piece be difficult to the location in the left and right directions, the side cut terrace die can touch the forging piece when cutting edge, to cut partially or make the overlap warp, cause the forging piece to scrap or the side cut equipment damages when serious.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a novel structure of a transmission shaft flange yoke finish forging die which can prolong the service life of the die, improve the quality of a forged piece and facilitate the positioning of the forged piece during trimming operation.
In order to solve the technical problems, the utility model adopts the following technical scheme: the novel structure of the final forging die for the flange yoke of the transmission shaft comprises an upper forging die and a lower forging die positioned right below the upper forging die, wherein the lower surface of the upper forging die is provided with a disc upper half cavity, and the left side and the right side of the disc upper half cavity are respectively provided with a left pressing block and a right pressing block which have the same structure and are bilaterally symmetrical; the upper surface of the lower forging die is provided with a left fork cavity and a right fork cavity which are bilaterally symmetrical, a lower disc part cavity which is vertically corresponding to the upper disc part cavity is arranged above the left fork cavity and the right fork cavity, the upper surface of the lower forging die is provided with a left pressure groove which is matched with the left pressing block in shape on the left side of the left fork cavity, the upper surface of the lower forging die is provided with a right pressure groove which is matched with the right pressing block in shape on the right side of the right fork cavity, the distance between the front side surface of the left pressing block and the rear side surface of the left pressing block is gradually increased from right to left, the front side surface of the left pressing block and the rear side surface of the left pressing block are symmetrically arranged around the center of the upper disc part cavity, and the distance between the front side surface of the right pressing block and the rear side surface of the right pressing block is gradually increased from left to right.
The included angles between the front side surface of the left pressing block, the rear side surface of the left pressing block, the front side surface of the right pressing block and the vertical surface where the center line between the left fork part cavity and the right fork part cavity is located are 50-60 degrees.
The included angle is 55 degrees.
By adopting the technical scheme, in order to improve the service life of a die and the quality of a forged piece of the flange yoke, reduce the production process cost of the flange yoke and modify the flash structure of the flange yoke, the utility model improves the condition that the front side surface and the rear side surface of a left pressing block and a right pressing block are both vertical to the vertical surface where the center line between two fork part cavities is positioned into the condition that the included angle beta between the front side surface of the left pressing block, the rear side surface of the left pressing block, the front side surface of the right pressing block and the rear side surface of the right pressing block and the vertical surface where the center line between the left fork part cavity and the right fork part cavity is positioned is 50-60 degrees, and the structure is embodied on a final forged piece: the included angle beta between the plane of the front vertical flange and the plane of the rear vertical flange of the flange fork forging and the vertical plane of the center line between the two fork ear parts is 50-60 degrees. The structure has the following technical effects after improvement:
1) the left pressing block and the right pressing block of the upper forging die are thickened in the front and back directions, the strength of the left pressing block and the right pressing block is improved, the upper forging die is more durable, the service life of the die is prolonged, and the cost of a single die is reduced. The parameters of the preferred 55-degree included angle have the advantages of improving the strength and not excessively increasing the manufacturing cost of the die;
2) during the trimming process, the front vertical flash and the rear vertical flash can play a role in positioning in the front and rear direction and the left and right direction, the consistency of the flange fork forging piece placed in the trimming cavity is ensured, the forging piece is not easy to move during trimming, the reliability of trimming is ensured, the consistency of the peripheral burrs of the trimmed forging piece is uniform, and the consistency of the appearance quality of the forging piece is high;
3) the rear side edge of the front vertical flash after the finish forging die splitting is connected with the front side surface of the fork ear part to form an obtuse included angle, the front side edge of the rear vertical flash is connected with the middle of the rear side surface of the fork ear part to form an obtuse included angle, and the lower end of the rear side edge of the front vertical flash and the lower end of the front side edge of the rear vertical flash are connected with the edge of the disc part; the improvement of the structure is that the abrasion degree of a pressing block and a pressing groove of the forging die on the die surface of the die cavity corresponding to the vertical flash is basically kept consistent, so that the die cavity is prevented from generating a wavy surface, and the condition that the die parting position of the forging is folded due to metal backflow is avoided.
Drawings
Fig. 1 is a schematic perspective view of an upper forging die of a conventional finish forging die;
fig. 2 is a schematic perspective view of a lower forging die of a conventional finish forging die;
FIG. 3 is a schematic perspective view of a flange yoke forging forged with a conventional finish forging die;
FIG. 4 is a top view of a flange yoke forging forged with a prior art finish forging die;
FIG. 5 is a schematic perspective view of the upper forging die of the present invention;
FIG. 6 is a schematic perspective view of a lower forging die according to the present invention
FIG. 7 is a schematic perspective view of a flanged yoke forging forged with the present invention;
FIG. 8 is a top view of a flange yoke forging forged using the present invention.
Detailed Description
As shown in fig. 5 and 6, the novel structure of the transmission shaft flange yoke finish forging die comprises an upper forging die 20 and a lower forging die 21 positioned right below the upper forging die 20, wherein a disc upper half cavity 10 is arranged on the lower surface of the upper forging die 20, and a left pressing block 11 and a right pressing block 12 which are identical in structure and are bilaterally symmetrical are respectively arranged on the left side and the right side of the disc upper half cavity 10; the upper surface of a lower forging die 21 is provided with a left fork cavity 13 and a right fork cavity 14 which are bilaterally symmetrical, a disc lower half cavity 15 which is vertically corresponding to the disc upper half cavity 10 is arranged above the left fork cavity 13 and the right fork cavity 14, the left side of the left fork cavity 13 is provided with a left indent 16 which is matched with the left pressing block 11 in shape, the right side of the right fork cavity 14 is provided with a right indent 17 which is matched with the right pressing block 12 in shape, the distance between the front side surface of the left pressing block 11 and the rear side surface of the left pressing block 11 is gradually increased from right to left, the front side surface of the left pressing block 11 and the rear side surface of the left pressing block 11 are symmetrically arranged from front to back relative to the center of the disc upper half cavity 10, and the distance between the front side surface of the right pressing block 12 and the rear side surface of the right pressing block 12 is gradually increased from left to right.
The included angles between the front side surface of the left pressing block 11, the rear side surface of the left pressing block 11, the front side surface of the right pressing block 12 and the vertical plane of the center line between the left fork cavity 13 and the right fork cavity 14 are 50-60 degrees, and 55 degrees is preferred.
The flange fork forging forged by the utility model comprises a disc part 1, two fork lug parts 4, a front plane flash 2 and a rear plane flash 3 connected with the disc part 1, a side plane flash 5, a front vertical flash 6 and a rear vertical flash 7 connected with the outer sides of the two fork lug parts 4, wherein the front plane flash 2, the rear plane flash 3 and the side plane flash 5 are all parallel to a horizontal plane, the upper end of the front vertical flash 6 is connected with the front end of the side plane flash 5, the upper end of the rear vertical flash 7 is connected with the rear end of the side plane flash 5, the front vertical flash 6 and the rear vertical flash 7 are symmetrically arranged front and back, and the included angle beta between the plane where the front vertical flash 6 and the rear vertical flash 7 are located and the vertical plane where the center line between the two fork lug parts 4 is located is 55 degrees.
The rear side edge of the front vertical flash 6 is connected with the front side surface of the fork ear part 4 to form an obtuse included angle, and the front side edge of the rear vertical flash 7 is connected with the middle of the rear side surface of the fork ear part 4 to form an obtuse included angle.
The lower end of the rear side edge of the front vertical flange 6 and the lower end of the front side edge of the rear vertical flange 7 are connected with the edge of the disc part 1.
The structure of the utility model has the following technical effects after improvement:
1) the left pressing block 11 and the right pressing block 12 of the upper forging die 20 are thickened in the front and rear directions, the strength of the left pressing block 11 and the strength of the right pressing block 12 are improved, the die is more durable, the service life of the die is prolonged, and the cost of a single die is reduced. The parameters of the preferred 55-degree included angle have the advantages of improving the strength and not excessively increasing the manufacturing cost of the die;
2) during the trimming process, the front vertical flash and the rear vertical flash can play a role in positioning in the front and rear direction and the left and right direction, the consistency of the flange fork forging piece placed in the trimming cavity is ensured, the forging piece is not easy to move during trimming, the reliability of trimming is ensured, the consistency of the peripheral burrs of the trimmed forging piece is uniform, and the consistency of the appearance quality of the forging piece is high;
3) the rear side edge of the front vertical flash after the finish forging die splitting is connected with the front side surface of the fork ear part to form an obtuse included angle, the front side edge of the rear vertical flash is connected with the middle of the rear side surface of the fork ear part to form an obtuse included angle, and the lower end of the rear side edge of the front vertical flash and the lower end of the front side edge of the rear vertical flash are connected with the edge of the disc part; the improvement of the structure is that the abrasion degree of a pressing block and a pressing groove of the forging die on the die cavity and the die surface corresponding to the vertical flash are basically kept consistent, so that the die cavity is prevented from generating a wavy surface, and the condition that the die parting position of the forging piece is folded due to metal backflow is avoided;
tests prove that the flash structure of the utility model produced by using a new forging die comprises the following components in percentage by weight:
(1) the service life of the forging die is prolonged to 3500 from 500, so that the raw material and heat treatment cost of the die are reduced;
(2) the service life of the trimming die is prolonged from 1000 pieces to 2200 pieces;
(3) the production efficiency is improved by 10 percent.

Claims (3)

1. The novel structure of the final forging die for the flange yoke of the transmission shaft comprises an upper forging die and a lower forging die positioned right below the upper forging die, wherein the lower surface of the upper forging die is provided with a disc upper half cavity, and the left side and the right side of the disc upper half cavity are respectively provided with a left pressing block and a right pressing block which have the same structure and are bilaterally symmetrical; lower forging die upper surface is equipped with bilateral symmetry's left fork portion die cavity and right fork portion die cavity, and left fork portion die cavity and right fork portion die cavity top are equipped with the disk portion lower half die cavity that corresponds from top to bottom with disk portion first die cavity, and lower forging die upper surface is equipped with the left indent with left briquetting shape looks adaptation in left fork portion die cavity left side, and lower forging die upper surface is equipped with on right fork portion die cavity right side with right briquetting shape looks adaptation right indent, its characterized in that: the distance between the front side surface of the left pressing block and the rear side surface of the left pressing block is gradually increased from right to left, the front side surface of the left pressing block and the rear side surface of the left pressing block are symmetrically arranged front and back relative to the center of the upper half cavity of the disc part, and the distance between the front side surface of the right pressing block and the rear side surface of the right pressing block is gradually increased from left to right.
2. The new structure of the finish forging die for the flange yoke of the transmission shaft according to claim 1, wherein: the included angles between the front side surface of the left pressing block, the rear side surface of the left pressing block, the front side surface of the right pressing block and the vertical surface where the center line between the left fork part cavity and the right fork part cavity is located are 50-60 degrees.
3. The new structure of the finish forging die for the flange yoke of the transmission shaft according to claim 2, wherein: the included angle is 55 degrees.
CN202121274921.9U 2021-06-08 2021-06-08 New structure of finish forging die for transmission shaft flange yoke Active CN215824166U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121274921.9U CN215824166U (en) 2021-06-08 2021-06-08 New structure of finish forging die for transmission shaft flange yoke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121274921.9U CN215824166U (en) 2021-06-08 2021-06-08 New structure of finish forging die for transmission shaft flange yoke

Publications (1)

Publication Number Publication Date
CN215824166U true CN215824166U (en) 2022-02-15

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ID=80189759

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121274921.9U Active CN215824166U (en) 2021-06-08 2021-06-08 New structure of finish forging die for transmission shaft flange yoke

Country Status (1)

Country Link
CN (1) CN215824166U (en)

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