CN113751650A - Bidirectional heading ball forging device - Google Patents
Bidirectional heading ball forging device Download PDFInfo
- Publication number
- CN113751650A CN113751650A CN202111053172.1A CN202111053172A CN113751650A CN 113751650 A CN113751650 A CN 113751650A CN 202111053172 A CN202111053172 A CN 202111053172A CN 113751650 A CN113751650 A CN 113751650A
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- die
- forging
- die cavity
- heading ball
- heading
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- 238000005242 forging Methods 0.000 title claims abstract description 131
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure
Abstract
The utility model provides a two-way heading ball forging device, belongs to and forges the technical field that takes shape, solves the two-way heading ball of bar and takes shape the technical problem that production efficiency is low, and the solution is: the two ends of the connecting die cavity are symmetrically provided with a first truncated cone-shaped pre-forging heading ball die cavity to form a pre-forging die cavity I, a second truncated cone-shaped pre-forging heading ball die cavity and the first truncated cone-shaped pre-forging heading ball die cavity to form a drum-shaped pre-forging heading ball die cavity, the two ends of the connecting die cavity are symmetrically provided with a first semi-spherical final-forging heading ball die cavity to form a final-forging die cavity II, and the second semi-spherical final-forging heading ball die cavity and the first semi-spherical final-forging heading ball die cavity to form a spherical final-forging ball die cavity; or third circular truncated cone-shaped heading ball connecting die cavities are symmetrically arranged at two ends of the connecting die cavity, a pre-forging forming station III is formed when the second circular truncated cone-shaped pre-forging heading ball die cavity corresponds to the third circular truncated cone-shaped heading ball connecting die cavity, and a final-forging forming station IV is formed when the second hemispherical final-forging heading ball die cavity corresponds to the third circular truncated cone-shaped heading ball connecting die cavity. The invention can obviously improve the production efficiency of forging and forming the bidirectional heading ball.
Description
Technical Field
The invention belongs to the technical field of forging forming, and particularly relates to a bidirectional heading ball forging device.
Background
According to the requirement of actual use of a workpiece, the end part of a bar needs to be formed by upsetting balls, the traditional forging method is that one end of the bar is placed into a die for forming the upsetting balls after the bar is heated, then the other end of the bar is heated again after the bar is taken out, and then the other end of the bar is placed into the die for forming the upsetting balls on the other side.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and improve the production efficiency of bar heading ball forming, and provides a bidirectional heading ball forging device.
In order to solve the problems, the technical scheme of the invention is as follows:
the utility model provides a two-way heading ball forging device, it includes cope match-plate pattern, goes up mould, lower bolster, lower mould bedplate, right mould and left mould, wherein:
the die handle of the upper die plate is fixedly connected with the press, an upper die is fixedly arranged below the upper die plate, a lower die plate is fixedly arranged above a lower die base plate, a lower die is fixedly arranged above the lower die plate, the lower die is correspondingly arranged below the upper die, and a connecting die cavity for forging and forming a connecting rod part is arranged at the parting surface of the upper die and the lower die;
a right cushion block is arranged on the right side of the lower die plate above the lower die base plate, a right die is arranged above the right cushion block, the right end face of the right die is in threaded connection with a right push rod, and the right push rod drives the right die to close or separate the die from one side of the lower die to the upper die along the right cushion block;
a left cushion block is arranged on the left side of the lower die plate above the lower die seat plate, a left die is arranged above the left cushion block, the left side end face of the left die is in threaded connection with a left push rod, and the left push rod drives the left die to close or separate the die to one side of the upper die and the lower die along the left cushion block;
the two ends of the connecting die cavity are symmetrically provided with first truncated cone-shaped pre-forging heading ball die cavities to form a pre-forging die cavity I, the two ends of the connecting die cavity are symmetrically provided with first semi-spherical final-forging heading ball die cavities to form a final-forging die cavity II, and the axis direction of the pre-forging die cavity I is parallel to the axis direction of the final-forging die cavity II; the left die and the right die are symmetrically arranged, a second truncated cone-shaped pre-forging heading ball die cavity and a second hemispherical final-forging heading ball die cavity are respectively arranged at the parting surfaces of the left die and the right die, the second truncated cone-shaped pre-forging heading ball die cavity is opposite to the first truncated cone-shaped pre-forging heading ball die cavity, and the second hemispherical final-forging heading ball die cavity is opposite to the first hemispherical final-forging heading ball die cavity; after the left die, the right die, the upper die and the lower die are assembled, the second truncated cone-shaped pre-forging heading ball die cavity and the first truncated cone-shaped pre-forging heading ball die cavity form a drum-shaped pre-forging heading ball die cavity, and the second hemispherical final-forging heading ball die cavity and the first hemispherical final-forging heading ball die cavity form a spherical final-forging heading ball die cavity.
Further, the upper die plate is fixedly connected with the upper die through a first bolt, the lower die is fixedly installed above the lower die plate through a second bolt, and the lower die plate is fixedly installed above the lower die base plate through a third bolt.
Furthermore, rectangular sliding grooves are formed in the upper surfaces of the right cushion block and the left cushion block respectively, and rectangular sliding blocks matched with the rectangular sliding grooves are arranged on the lower surfaces of the left die and the right die.
Furthermore, third circular truncated cone-shaped heading ball connecting die cavities are symmetrically arranged at two ends of the connecting die cavity; the left die and the right die respectively comprise a baffle and a sliding block, a left push rod and a right push rod are respectively and fixedly arranged on the outer side surfaces of the corresponding baffles, a sliding block guide groove is formed in the inner side surface of each baffle, a push-pull rod is arranged on the inner side wall of each sliding block guide groove, the sliding blocks are arranged in the sliding block guide grooves, and the push-pull rods drive the sliding blocks to reciprocate along the sliding block guide grooves; a second truncated cone-shaped pre-forging heading ball die cavity and a second hemispherical finish-forging heading ball die cavity are arranged on the outer end face of the sliding block along the horizontal direction;
and the left push rod and the right push rod respectively drive the corresponding left die and the corresponding right die to close the dies on one side of the upper die and the lower die, the die parting surfaces are not contacted, a pre-forging forming station III is formed when the second circular truncated cone-shaped pre-forging heading ball die cavity corresponds to the third circular truncated cone-shaped heading ball connecting die cavity, and a final-forging forming station IV is formed when the second hemispherical final-forging heading ball die cavity corresponds to the third circular truncated cone-shaped heading ball connecting die cavity.
Compared with the prior art, the invention has the beneficial effects that:
the invention can perform pre-forging upsetting forming on the two ends of the bar and then perform final forging upsetting ball forming, or perform upsetting forming on the two ends of the bar for multiple times by once clamping the bar, so that the two ends are finally upset into a ball shape, the production efficiency is improved, and the two ends of the bar with smaller diameter can be formed into a ball shape with larger diameter.
Drawings
FIG. 1 is a schematic front view of a bidirectional heading ball forging apparatus according to an embodiment;
FIG. 2 is a schematic top view of the structure of FIG. 1;
FIG. 3 is a schematic front view of the left mold of FIG. 1;
FIG. 4 is a front cross-sectional structural view of FIG. 3;
FIG. 5 is a schematic front view of the lower mold shown in FIG. 1;
FIG. 6 is a schematic top view of the structure of FIG. 5;
FIG. 7 is a schematic structural diagram of a two-way heading ball forging apparatus in accordance with the second embodiment;
FIG. 8 is a schematic top view of the structure of FIG. 7 with the bi-directional heading ball forging apparatus in the pre-forging forming station;
FIG. 9 is a view taken along line A of FIG. 8;
fig. 10 is a schematic top view of the structure of fig. 7 with the bidirectional heading ball forging apparatus at the finish forging forming station.
In the figure, 1 is a first bolt, 2 is an upper template, 3 is an upper die, 4 is a right die, 5 is a right push rod, 6 is a lower die, 7 is a second bolt, 8 is a lower template, 9 is a right cushion block, 10 is a third bolt, 11 is a lower die seat plate, 12 is a left die, 13 is a left push rod, 14 is a left cushion block, 15 is a connecting die cavity, 16 is a first truncated cone-shaped pre-forging heading ball die cavity, 17 is a first semi-spherical final forging heading ball die cavity, 18 is a second truncated cone-shaped pre-forging heading ball die cavity, 19 is a second semi-spherical final forging heading ball die cavity, 20 is a baffle, 21 is a slide block, 22 is a third truncated cone-shaped heading ball connecting die cavity, and 23 is a push-pull rod;
i is a pre-forging die cavity, II is a finish-forging die cavity, III is a pre-forging forming station, and IV is a finish-forging forming station.
Detailed Description
The invention is described in further detail below with reference to the figures and examples.
Example one
As shown in fig. 1 to 6, the bidirectional heading ball forging device comprises an upper die plate 2, an upper die 3, a lower die 6, a lower die plate 8, a lower die seat plate 11, a right die 4 and a left die 12, wherein:
the die shank of the upper die plate 2 is fixedly connected with a press machine, an upper die 3 is fixedly arranged below the upper die plate 2, a lower die plate 8 is fixedly arranged above a lower die base plate 11, a lower die 6 is fixedly arranged above the lower die plate 8, the lower die 6 is correspondingly arranged below the upper die 3, and a connecting die cavity for forging and forming a connecting rod part is arranged at the die parting surface of the upper die 3 and the lower die 6;
a right cushion block 9 is arranged on the right side of the lower die plate 8 above the lower die base plate 11, a right die 4 is arranged above the right cushion block 9, the right end face of the right die 4 is in threaded connection with a right push rod 5, and the right push rod 5 drives the right die 4 to close or separate the die from one side of the upper die 3 and the lower die 6 along the right cushion block 9;
a left cushion block 14 is arranged on the left side of the lower die plate 8 above the lower die base plate 11, a left die 12 is arranged above the left cushion block 14, the left end face of the left die 12 is in threaded connection with a left push rod 13, and the left push rod 13 drives the left die 12 to close or separate the die from one side of the upper die 3 and the lower die 6 along the left cushion block 14;
the two ends of the connecting die cavity are symmetrically provided with first truncated cone-shaped pre-forging heading ball die cavities to form a pre-forging die cavity, the two ends of the connecting die cavity are symmetrically provided with first semi-spherical final-forging heading ball die cavities to form a final-forging die cavity, and the axis direction of the pre-forging die cavity is parallel to the axis direction of the final-forging die cavity; the left die 12 and the right die 4 are symmetrically arranged, a second truncated cone-shaped pre-forging heading ball die cavity and a second hemispherical final-forging heading ball die cavity are respectively arranged at the parting faces of the left die 12 and the right die 4, the second truncated cone-shaped pre-forging heading ball die cavity is opposite to the first truncated cone-shaped pre-forging heading ball die cavity, the second hemispherical final-forging heading ball die cavity is opposite to the first hemispherical final-forging heading ball die cavity, after the left die 12, the right die 4, the upper die 3 and the lower die 6 are closed, the second truncated cone-shaped pre-forging heading ball die cavity and the first truncated cone-shaped pre-forging heading ball die cavity form a drum-shaped pre-forging ball die cavity, and the second hemispherical final-forging ball die cavity and the first hemispherical final-forging ball die cavity form a drum-shaped final-forging ball die cavity.
Further, the upper die plate 2 and the upper die 3 are fixedly connected through a first bolt 1, the lower die 6 is fixedly installed above the lower die plate 8 through a second bolt 7, and the lower die plate 8 is fixedly installed above the lower die seat plate 11 through a third bolt 10.
Furthermore, rectangular sliding grooves are respectively formed in the upper surfaces of the right cushion block 9 and the left cushion block 14, and rectangular sliding blocks matched with the rectangular sliding grooves are arranged on the lower surfaces of the left die 12 and the right die 4.
The use process of the bidirectional heading ball forging device in the first embodiment is as follows:
s1, heating the bar stock, putting the bar stock into the pre-forging die cavity I, and enabling the upper die 3 to descend to be matched with the lower die 6;
s2, starting a hydraulic control system to enable the left push rod 13 and the right push rod 5 to synchronously move in opposite directions, enabling the right push rod 5 to drive the right die 4 to close the upper die 3 and the lower die 6 along the right cushion block 9, enabling the left push rod 13 to drive the left die 12 to close the upper die 3 and the lower die 6 along the left cushion block 14, and enabling two ends of the bar to be upset into a drum shape;
s3, the pre-forging formed left die 12 and the pre-forging formed right die 4 are respectively reset under the control of the corresponding left push rod 13 and the right push rod 5, the upper die 3 moves upwards, the bar is taken out and placed into the finish forging die cavity II, and the step S2 is repeated, so that the two ends of the bar are upset into a spherical shape. When the length-diameter ratio of the bar stock participating in the forming is overlarge, the number of the pre-forging cavities can be increased, so that the two ends of the bar stock are gradually upset, and finally the bar stock becomes spherical.
Example two
A bidirectional heading ball forging apparatus as shown in fig. 7 to 10, wherein: the two ends of the connecting die cavity 15 are symmetrically provided with a third circular truncated cone-shaped heading ball connecting die cavity 22; the left die 12 and the right die 4 both comprise a baffle 20 and a slide block 21, the left push rod 13 and the right push rod 5 are respectively and fixedly arranged on the outer side surface of the corresponding baffle 20, the inner side surface of the baffle 20 is provided with a slide block guide groove, the inner side wall of the slide block guide groove is provided with a push-pull rod 23, the slide block 21 is arranged in the slide block guide groove, and the push-pull rod 23 drives the slide block to reciprocate along the slide block guide groove; a second truncated cone-shaped pre-forging heading ball die cavity 18 and a second hemispherical finish-forging heading ball die cavity 19 are arranged on the outer end face of the sliding block along the horizontal direction;
the left push rod 13 and the right push rod 5 respectively drive the corresponding left die 12 and the corresponding right die 4 to close the dies on one sides of the upper die 3 and the lower die 6, die parting surfaces are not contacted, a second circular truncated cone-shaped pre-forging heading ball die cavity 18 and a third circular truncated cone-shaped heading ball connecting die cavity 22 form a pre-forging forming station III when corresponding, a second hemispherical final-forging heading ball die cavity 19 and a third circular truncated cone-shaped heading ball connecting die cavity 22 form a final-forging forming station IV when corresponding, the structure and the position relation of parts which are not explained in the second embodiment are the same as those in the first embodiment, and no repeated description is given here.
The two-way heading ball forging device in the second embodiment is used as follows:
s1, heating the bar stock and then placing the bar stock into the connecting die cavity 15, and enabling the upper die 3 to descend to be matched with the lower die 6;
s2, starting a hydraulic control system to enable the left push rod 13 and the right push rod 5 to synchronously move in opposite directions, and driving the sliding block 21 to move backwards to the pre-forging forming station III by the push-pull rod 23; the right push rod 5 drives the right die 4 to match the die with one side of the lower die 3 along the right cushion block 9, the left push rod 13 drives the left die 12 to match the die with one side of the lower die 6 along the left cushion block 14 towards the upper die 3, and the second truncated cone-shaped pre-forging heading ball die cavity 18 corresponds to the third truncated cone-shaped heading ball connecting die cavity 22, so that the two ends of the bar are upset to be in the shape of the third truncated cone-shaped heading ball connecting die cavity 22;
s3, the left die 12 and the right die 4 after forming are respectively reset under the control of the corresponding left push rod 13 and the right push rod 5, and the push-pull rod 23 drives the slide block 21 to move forwards to a finish forging forming station IV; the right push rod 5 drives the right die 4 to close the die with one side of the upper die 3 and the lower die 6 along the right cushion block 9 but not to contact with the upper die and the lower die, the left push rod 13 drives the left die 12 to close the die with one side of the upper die 3 and the lower die 6 along the left cushion block 14 but not to contact with the upper die and the lower die, and the second hemispherical finish forging heading ball die cavity 19 corresponds to the third circular truncated cone shaped heading ball connecting die cavity 22;
s4, forming a cavity formed by an upper die and a lower die in a hemisphere close to one side of the end of the bar, forming a corresponding heading ball die cavity on the left and right sliding blocks in a hemisphere far away from one side of the end of the bar, and forming a connecting part between the hemispheres at the two sides by extrusion upsetting between the left and right die blocks and the upper and lower dies without contacting with the cavity. The mode only needs to clamp the blank once, and can carry out upsetting forming on two ends of the bar for many times.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (4)
1. The utility model provides a two-way heading ball forging device, it includes cope match-plate pattern (2), goes up mould (3), lower mould (6), lower bolster (8), lower mould bedplate (11), right mould (4) and left mould (12), its characterized in that:
the die shank of the upper die plate (2) is fixedly connected with a press, an upper die (3) is fixedly arranged below the upper die plate (2), a lower die plate (8) is fixedly arranged above a lower die base plate (11), a lower die (6) is fixedly arranged above the lower die plate (8), the lower die (6) is correspondingly arranged below the upper die (3), and a connecting die cavity (15) for forging and forming a connecting rod part is arranged at the parting surface of the upper die (3) and the lower die (6);
a right cushion block (9) is arranged on the right side of the lower die plate (8) above the lower die base plate (11), a right die (4) is arranged above the right cushion block (9), the right end face of the right die (4) is in threaded connection with a right push rod (5), and the right push rod (5) drives the right die (4) to close or separate the die from one side of the upper die (3) and the lower die (6) along the right cushion block (9);
a left cushion block (14) is arranged on the left side of the lower template (8) above the lower die base plate (11), a left die (12) is arranged above the left cushion block (14), the left side end face of the left die (12) is in threaded connection with a left push rod (13), and the left push rod (13) drives the left die (12) to close or separate the die from one side of the upper die (3) and the lower die (6) along the left cushion block (14);
the two ends of the connecting die cavity (15) are symmetrically provided with a first truncated cone-shaped pre-forging heading ball die cavity (16) to form a pre-forging die cavity I, the two ends of the connecting die cavity (15) are symmetrically provided with a first semi-spherical final-forging heading ball die cavity (17) to form a final-forging die cavity II, and the axial direction of the pre-forging die cavity I is parallel to the axial direction of the final-forging die cavity II; the left die (12) and the right die (4) are symmetrically arranged, a second truncated cone-shaped pre-forging heading ball die cavity (18) and a second hemispherical final-forging heading ball die cavity (19) are respectively arranged at the parting surfaces of the left die (12) and the right die (4), the second truncated cone-shaped pre-forging heading ball die cavity (18) is opposite to the first truncated cone-shaped pre-forging heading ball die cavity (16), and the second hemispherical final-forging heading ball die cavity (19) is opposite to the first hemispherical final-forging heading ball die cavity (17); and after the left die (12), the right die (4), the upper die (3) and the lower die (6) are closed, a drum-shaped pre-forging heading ball die cavity is formed by a second circular truncated cone-shaped pre-forging heading ball die cavity (18) and a first circular truncated cone-shaped pre-forging heading ball die cavity (16), and a spherical final-forging heading ball die cavity is formed by a second hemispherical final-forging heading ball die cavity (19) and a first hemispherical final-forging heading ball die cavity (17).
2. The bidirectional heading ball forging device as recited in claim 1, wherein: the upper die plate (2) is fixedly connected with the upper die (3) through a first bolt (1), the lower die (6) is fixedly installed above the lower die plate (8) through a second bolt (7), and the lower die plate (8) is fixedly installed above the lower die seat plate (11) through a third bolt (10).
3. The bidirectional heading ball forging device as recited in claim 1, wherein: rectangular sliding grooves are formed in the upper surfaces of the right cushion block (9) and the left cushion block (14) respectively, and rectangular sliding blocks matched with the rectangular sliding grooves are arranged on the lower surfaces of the left die (12) and the right die (4).
4. The bidirectional heading ball forging device as recited in claim 1, wherein:
the two ends of the connecting die cavity (15) are symmetrically provided with a third circular truncated cone-shaped heading ball connecting die cavity (22); the left die (12) and the right die (4) both comprise a baffle (20) and a sliding block (21), a left push rod (13) and a right push rod (5) are respectively and fixedly arranged on the outer side surfaces of the corresponding baffles (20), a sliding block guide groove is formed in the inner side surface of each baffle (20), a push-pull rod (23) is arranged on the inner side wall of the sliding block guide groove, the sliding block (21) is arranged in the sliding block guide groove, and the push-pull rod (23) drives the sliding block to reciprocate along the sliding block guide groove; a second truncated cone-shaped pre-forging heading ball die cavity (18) and a second hemispherical final-forging heading ball die cavity (19) are arranged on the outer end face of the sliding block along the horizontal direction;
the left push rod (13) and the right push rod (5) respectively drive the corresponding left die (12) and the right die (4) to close the dies on one side of the upper die (3) and the lower die (6) and the die parting surfaces are not contacted, a second circular truncated cone-shaped pre-forging heading ball die cavity (18) and a third circular truncated cone-shaped heading ball connecting die cavity (22) form a pre-forging forming station III when corresponding, and a second hemispherical final-forging heading ball die cavity (19) and the third circular truncated cone-shaped heading ball connecting die cavity (22) form a final-forging forming station IV when corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111053172.1A CN113751650B (en) | 2021-09-09 | 2021-09-09 | Bidirectional upsetting-ball forging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111053172.1A CN113751650B (en) | 2021-09-09 | 2021-09-09 | Bidirectional upsetting-ball forging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113751650A true CN113751650A (en) | 2021-12-07 |
| CN113751650B CN113751650B (en) | 2023-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111053172.1A Active CN113751650B (en) | 2021-09-09 | 2021-09-09 | Bidirectional upsetting-ball forging device |
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| CN (1) | CN113751650B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415745A (en) * | 2022-09-09 | 2022-12-02 | 江苏双环齿轮有限公司 | Production process of multi-step precision die forging of shafting containing holes |
| CN117000940A (en) * | 2023-09-04 | 2023-11-07 | 常州市丰乐精锻有限公司 | Forging die, equipment and method for crude material of fuel pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115415745A (en) * | 2022-09-09 | 2022-12-02 | 江苏双环齿轮有限公司 | Production process of multi-step precision die forging of shafting containing holes |
| CN115415745B (en) * | 2022-09-09 | 2024-01-26 | 江苏双环齿轮有限公司 | Production process of multi-step precision die forging with hole shafting |
| CN117000940A (en) * | 2023-09-04 | 2023-11-07 | 常州市丰乐精锻有限公司 | Forging die, equipment and method for crude material of fuel pipe |
| CN117000940B (en) * | 2023-09-04 | 2023-12-19 | 常州市丰乐精锻有限公司 | Forging die, equipment and method for crude material of fuel pipe |
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| CN113751650B (en) | 2023-11-24 |
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