CN108405781B - Automatic roll forging device for connecting rod - Google Patents
Automatic roll forging device for connecting rod Download PDFInfo
- Publication number
- CN108405781B CN108405781B CN201810103408.XA CN201810103408A CN108405781B CN 108405781 B CN108405781 B CN 108405781B CN 201810103408 A CN201810103408 A CN 201810103408A CN 108405781 B CN108405781 B CN 108405781B
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- China
- Prior art keywords
- telescopic arm
- manipulator
- seat
- hydraulic cylinder
- roll forging
- Prior art date
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- 238000010080 roll forging Methods 0.000 title claims abstract description 30
- 238000013519 translation Methods 0.000 claims abstract description 33
- 210000000078 claw Anatomy 0.000 claims description 37
- 238000001125 extrusion Methods 0.000 claims description 36
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 description 14
- 238000005242 forging Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 238000003825 pressing Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002730 additional effect Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- 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
- B21J13/08—Accessories for handling work or tools
- B21J13/10—Manipulators
-
- 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
- B21J9/02—Special design or construction
- B21J9/025—Special design or construction with rolling or wobbling dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention provides a connecting rod automatic roll forging device which comprises a roll forging machine and a feeding manipulator, wherein in the feeding manipulator, a manipulator assembly is connected with a first telescopic arm, the first telescopic arm is in sliding sleeve joint with a second telescopic arm, and a telescopic hydraulic cylinder is arranged between the first telescopic arm and the second telescopic arm; the tail part of the second telescopic arm is hinged with the translation seat, and the middle position of the bottom of the second telescopic arm is hinged with the translation seat through an amplitude-variable hydraulic cylinder; the translation seat is slidably mounted on the translation sliding rail, and the translation seat is connected with the translation hydraulic cylinder. Through adopting the manipulator structure of optimizing, can realize giving the roll forging machine feed fast, and the structure is simpler than current manipulator.
Description
Technical Field
The invention relates to the field of automobile connecting rod machining, in particular to a connecting rod automatic roll forging device.
Background
In the prior art, the structure of the roll forging system is shown in JP 2006-297447, and a heated workpiece is conveyed to two press rolls by a manipulator to carry out rolling forging processing on the workpiece. The initial forging temperature of the workpiece is generally required to be between 1050 and 1100 ℃, and the cooling speed of the workpiece in the air is high, so that the quality of a finished product of the workpiece is affected by the excessive heating temperature.
Because of the different workpieces, the position of the material taking manipulator needs to be adjustable, but the additional action cost for the manipulator is higher, and the cost for adjusting the position of the material taking manipulator needs to be reduced.
In the prior art, the feeding manipulator is usually driven to open and close by an electromagnet or a hydraulic cylinder, and due to the fact that the temperature of a workpiece is high, part of parts in the feeding manipulator are vulnerable parts, such as a sliding rail and the hydraulic cylinder, are easy to damage due to the fact that the temperature of the workpiece is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a connecting rod automatic roll forging device which can be suitable for rapid feeding of a roll forging machine, and in the preferred scheme, the structure of a feeding manipulator is simplified, the service life of the feeding manipulator is prolonged, and the use cost of the feeding manipulator is reduced.
In order to solve the technical problems, the invention adopts the following technical scheme: the automatic roll forging device of the connecting rod comprises a roll forging machine and a feeding manipulator, wherein in the feeding manipulator, a manipulator assembly is connected with a first telescopic arm, the first telescopic arm is in sliding sleeve joint with a second telescopic arm, and a telescopic hydraulic cylinder is arranged between the first telescopic arm and the second telescopic arm;
the tail part of the second telescopic arm is hinged with the translation seat, and the middle position of the bottom of the second telescopic arm is hinged with the translation seat through an amplitude-variable hydraulic cylinder;
The translation seat is slidably mounted on the translation sliding rail, and the translation seat is connected with the translation hydraulic cylinder.
In the preferred scheme, the manipulator assembly is rotatably connected with the first telescopic arm, the outer wall of a paw seat of the manipulator assembly is connected with a rotary driving device through a transmission mechanism, and the rotary driving device is fixedly arranged on the outer wall of the first telescopic arm.
In the preferred scheme, the manipulator assembly is supported in the first telescopic arm through two sets of support bearings, and the outer wall of a paw seat of the manipulator assembly is provided with a rotary transmission gear set, and the rotary transmission gear set is connected with a speed reducer which is connected with a servo motor.
In the preferred scheme, in the manipulator assembly, at least two claws are hinged with a claw seat positioned at the inner side, the tail ends of the claws are provided with claw rods, and one side of each claw rod, which is close to the axis, is an inclined plane;
A manipulator sliding block is arranged between the gripper bars, the manipulator sliding block is contacted with the inclined plane, and the manipulator sliding block is connected with an opening and closing hydraulic cylinder fixedly arranged at the tail end of the gripper seat;
at least one tension spring is arranged between the hand claw rods.
In the preferred scheme, a paw seat groove for a paw rod to pass through is formed in the paw seat;
The opening and closing hydraulic cylinder is installed in the paw seat.
In the preferred scheme, pins are arranged at two sides of the free end of the hand claw rod, and each tension spring is connected with the pin;
The two sides of the manipulator sliding block, which are positioned on the hand claw rod, are provided with raised baffle plates.
In a preferred scheme, the cross section of the paw is C-shaped;
Or the cross section of the two claws is hexagonal.
In a preferred embodiment, a paw inner liner for heat insulation and thickness adjustment is provided on the inner side of the paw.
In the preferred scheme, the head end of the paw seat is also provided with a buffer heat insulation pad.
In the preferred scheme, in the roll forging device, an upper arc extrusion die and a lower arc extrusion die are arranged in parallel, the upper arc extrusion die and the lower arc extrusion die are driven to rotate by a driving device, and a die cavity is arranged on the surfaces of the upper arc extrusion die and the lower arc extrusion die;
The mold cavities are arranged in a plurality along the axis.
According to the automatic roll forging device for the connecting rod, provided by the invention, the roll forging machine can be rapidly fed by adopting an optimized manipulator structure, and the structure is simpler than that of the existing manipulator. In the preferred scheme, through the structural optimization design to the feeding manipulator, can reduce the dependence to manipulator part machining precision, reduce the influence of temperature variation to the part, especially to the influence of vulnerable part such as pneumatic cylinder, parts such as guide rail, extension feeding manipulator's under the high temperature operating mode life.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
Fig. 1 is a schematic front view of the overall structure of the present invention.
Fig. 2 is a schematic structural diagram of a feeding manipulator in the present invention.
Fig. 3 is a schematic top view of the present invention.
FIG. 4 is a schematic cross-sectional view of A-A in FIG. 2.
FIG. 5 is a schematic cross-sectional view of B-B in FIG. 2.
FIG. 6 is a schematic cross-sectional view of C-C in FIG. 2.
FIG. 7 is a schematic diagram of a manipulator assembly according to the present invention.
In the figure: the device comprises a heating furnace 1, a slide way 2, a feeding manipulator 3, a manipulator assembly 31, a gripper 3101, a gripper inner lining 3102, a gripper seat 3103, a gripper seat groove 3104, a gripper bar 3105, a manipulator slider 3106, a baffle 3107, a tension spring 3108, a buffer heat insulation pad 3109, a rotation driving device 32, a rotation transmission gear set 33, a support bearing 34, an opening and closing hydraulic cylinder 35, a first telescopic arm 36, a second telescopic arm 37, a telescopic hydraulic cylinder 38, a luffing hydraulic cylinder 39, a translation seat 300, a translation slide rail 301, a translation hydraulic cylinder 302, an upper circular arc extrusion die 4, a lower circular arc extrusion die 5, a material taking manipulator 6, a nut column 7, a material taking trolley 8, a distance fine adjustment device 9, a pushing device 10, a material unloading and conveying device 11, a roller forging machine 12, a first die cavity 121, a second die cavity 122 and a third die cavity 123.
Detailed Description
As shown in fig. 1, a connecting rod automatic roll forging device comprises a roll forging machine 12 and a feeding manipulator 3, wherein in the feeding manipulator 3, a manipulator assembly 31 is connected with a first telescopic arm 36, the first telescopic arm 36 is in sliding sleeve joint with a second telescopic arm 37, and a telescopic hydraulic cylinder 38 is arranged between the first telescopic arm 36 and the second telescopic arm 37;
the tail part of the second telescopic arm 37 is hinged with the translation seat 300, and the middle position of the bottom of the second telescopic arm 37 is hinged with the translation seat 300 through the amplitude hydraulic cylinder 39;
The translation seat 300 is slidably mounted on the translation slide rail 301, and the translation seat 300 is connected with the translation hydraulic cylinder 302.
As shown in fig. 1, the overall structure of the present invention is: the heating furnace 1 is positioned above the roll forging device, a slideway 2 is arranged at a discharge hole of the heating furnace 1, the cross section of the slideway is V-shaped, the feeding manipulator 3 is positioned between the bottom of the slideway 2 and a feed inlet of the roll forging device, and the material taking manipulator 6 is positioned at the other end of the roll forging device. The claw 3101 of the feeding manipulator 3 faces the bottom of the slideway 2 after being lifted, the heated workpiece just falls into the space between the claws 3101 of the feeding manipulator 3, then the feeding manipulator 3 rotates by an angle to restore to be horizontal, the workpiece is sent into the space between the upper circular arc extrusion die 4 and the lower circular arc extrusion die 5 of the roll forging device after being stretched, and the workpiece is taken out by the material taking manipulator 6 after being forged and molded.
In a preferred embodiment, as shown in fig. 2,3 and 7, the manipulator assembly 31 is rotatably connected with the first telescopic arm 36, the outer wall of the gripper seat 3103 of the manipulator assembly 31 is connected with the rotation driving device 32 through a transmission mechanism, and the rotation driving device 32 is fixedly mounted on the outer wall of the first telescopic arm 36.
In a preferred embodiment, as shown in fig. 2, the manipulator assembly 31 is supported in the first telescopic arm 36 through two sets of support bearings 34, a rotation transmission gear set 33 is arranged on the outer wall of a gripper seat 3103 of the manipulator assembly 31, the rotation transmission gear set 33 is connected with a speed reducer, and the speed reducer is connected with a servo motor. The speed reducer is preferably an RV speed reducer. With the above-described structure, the manipulator assembly 31 performs a rotation motion about the axis.
In the preferred embodiment, as shown in fig. 2 to 7, in the manipulator assembly 31, at least two claws 3101 are hinged with a claw seat 3103 located at the inner side, a claw rod 3105 is arranged at the tail end of the claw 3101, and one side of the claw rod 3105 close to the axis is an inclined plane; the trailing end described in this example refers to the right direction in fig. 6.
A manipulator slider 3106 is arranged between the gripper bars 3105, the manipulator slider 3106 contacts with the inclined plane, and the manipulator slider 3106 is connected with an opening and closing hydraulic cylinder 35 fixedly arranged at the tail end of the gripper seat 3103;
At least one tension spring 3108 is provided between the hand claw bars 3105. So that the hand 3101 can be opened without the hand slider 3106 between the hand claw bars 3105. Preferably, as shown in fig. 6, pins are provided on both sides of the free end of the claw pole 3105, and each of the pins is connected to a tension spring 3108 to open the claws 3101. The manipulator slider 3106 is driven to slide in the axial direction by the expansion and contraction of the piston rod of the opening and closing hydraulic cylinder 35, and when sliding to the right in fig. 7, the gripper 3101 closes to clamp the workpiece. When slid to the left in fig. 6, the pawl 3101 opens under the action of the tension spring 3108. With this structure, the service life of the opening and closing hydraulic cylinder 35 is greatly prolonged because the opening and closing hydraulic cylinder 35 is far from the workpiece.
In a preferred embodiment, as shown in fig. 7, the paw holder 3103 is provided with a paw holder slot 3104 through which a paw rod 3105 passes; the opening and closing hydraulic cylinder 35 is installed in the claw holder 3103.
The manipulator slider 3106 is provided with protruding stoppers 3107 on both sides of the gripper bar 3105.
In a preferred embodiment, the cross section of the paw 3101 is in a shape of "C";
or the two claws 3101 may have a hexagonal cross section. With the structure, the workpiece can be clamped and fixed better.
In a preferred embodiment, a paw inner lining 3102 for heat insulation and thickness adjustment is provided on the inner side of the paw 3101.
In a preferred embodiment, as shown in fig. 7, a buffer heat insulation pad 3109 is further provided at the head end of the paw holder 3103. The buffer heat insulation pad is made of asbestos, impact of a workpiece can be buffered, heat conducted to a driving device is reduced, and the service life of the whole feeding manipulator 3 is prolonged. The head end in this example refers to the left end of the finger rest 3103.
In the roll forging device, as shown in fig. 3, an upper circular arc extrusion die 4 and a lower circular arc extrusion die 5 are arranged in parallel, the upper circular arc extrusion die 4 and the lower circular arc extrusion die 5 are driven to rotate by a driving device, and a die cavity is arranged on the surfaces of the upper circular arc extrusion die 4 and the lower circular arc extrusion die 5;
The mold cavities are arranged in a plurality along the axis. With this configuration, the roll forging process can be completed in a single roll forging apparatus in a plurality of steps, and further, the conveying time of the workpiece can be shortened, and the processing quality of the workpiece can be improved.
As shown in fig. 1 to 7, the scheme of the present invention is further described in the following preferred embodiments:
The pushing device 10 is usually a hydraulic cylinder, the workpiece is sequentially pushed into the heating furnace 1, the heating furnace 1 heats the workpiece to 1050-1100 ℃, a piston rod of the amplitude changing hydraulic cylinder 39 extends out, the feeding manipulator 3 lifts up, the claw 3101 faces the bottom end of the slideway 2, meanwhile, the opening and closing hydraulic cylinder 35 acts, a piston rod of the opening and closing hydraulic cylinder 35 extends out, and the tension spring 3108 pulls the claw pole 3105 to open the claw 3101. Along with the pushing of the pushing device 10, the workpiece is pushed out of the heating furnace 1 and slides along the slideway 2. Falls between the open claws 3101 and is buffered by a buffer insulation pad 3109. The opening and closing hydraulic cylinder 35 operates, and the piston rod is retracted, so that the manipulator slider 3106 is driven to move to the right in fig. 7, and the slider 3106 pushes the gripper bar 3105 open, so that the gripper 3101 is closed, and the workpiece is clamped. The amplitude hydraulic cylinder 39 acts, and the piston rod is retracted, so that the feeding manipulator 3 is in a horizontal state. The telescopic hydraulic cylinder 38 is operated, the piston rod is extended, the workpiece is conveyed between the upper circular arc extrusion die 4 and the lower circular arc extrusion die 5, and the claw 3101 is loosened. The upper circular arc extrusion die 4 and the lower circular arc extrusion die 5 rotate to forge and mold the workpiece in the die cavity. It is further preferable that a plurality of parallel die cavities, for example, a first die cavity 121, a second die cavity 122 and a third die cavity 123, are provided in the upper circular arc extrusion die 4 and the lower circular arc extrusion die 5, and after forging and pressing is performed once, the upper circular arc extrusion die 4 and the lower circular arc extrusion die 5 are rotated reversely to return the work piece between the claws 3101 of the feeding robot 3 again, and the feeding robot 3 clamps the work piece. The telescopic hydraulic cylinder 38 acts, the piston rod is retracted, the workpiece is taken out, the piston rod of the translation hydraulic cylinder 302 extends, the translation seat 300 is pushed to slide along the translation sliding rail 301 for a certain distance to align with the second die cavity, the rotary driving device 32 acts, the whole manipulator assembly 31 is driven to rotate 90 degrees, the telescopic hydraulic cylinder 38 acts, the piston rod extends, and the workpiece is fed into the second die cavity between the upper circular arc extrusion die 4 and the lower circular arc extrusion die 5 for forging. After the forging and pressing are completed, the upper arc-shaped extrusion die 4 and the lower arc-shaped extrusion die 5 are reversed again, and the workpiece is returned to the feeding manipulator 3. The piston rod of the translation hydraulic cylinder 302 extends out to push the translation seat 300 to slide along the translation sliding rail 301 for a certain distance, the manipulator assembly 31 of the feeding manipulator 3 rotates 90 degrees again, and the workpiece is fed into a third die cavity between the upper circular arc extrusion die 4 and the lower circular arc extrusion die 5 for forging and pressing. After the forging and pressing are finished, the material taking manipulator 6 stretches out to take material, and the manipulator assembly 31 of the material taking manipulator 6 can also adopt the assembly structure of the feeding manipulator 3 to realize the opening and closing of the gripper 3101. The material taking manipulator 6 is loosened after taking the material, the workpiece falls onto the material unloading and conveying device 11 and is conveyed to the next working procedure, and the material unloading and conveying device 11 in the embodiment is a section of slideway and a crawler conveying device.
The above embodiments are merely preferred embodiments of the present application, and should not be construed as limiting the present application, and the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without collision. The protection scope of the present application is defined by the claims, and the protection scope includes equivalent alternatives to the technical features of the claims. I.e., equivalent replacement modifications within the scope of this application are also within the scope of the application.
Claims (5)
1. A connecting rod automatic roll forging device is characterized in that: the automatic feeding device comprises a roll forging machine (12) and a feeding manipulator (3), wherein in the feeding manipulator (3), a manipulator assembly (31) is connected with a first telescopic arm (36), the first telescopic arm (36) is in sliding sleeve joint with a second telescopic arm (37), and a telescopic hydraulic cylinder (38) is arranged between the first telescopic arm (36) and the second telescopic arm (37);
the tail part of the second telescopic arm (37) is hinged with the translation seat (300), and the middle position of the bottom of the second telescopic arm (37) is hinged with the translation seat (300) through a luffing hydraulic cylinder (39);
The translation seat (300) is slidably arranged on the translation sliding rail (301), and the translation seat (300) is connected with the translation hydraulic cylinder (302);
The manipulator assembly (31) is rotatably connected with the first telescopic arm (36), the outer wall of the paw seat (3103) of the manipulator assembly (31) is connected with the rotary driving device (32) through a transmission mechanism, and the rotary driving device (32) is fixedly arranged on the outer wall of the first telescopic arm (36);
The manipulator assembly (31) is supported in the first telescopic arm (36) through two groups of support bearings (34), a rotary transmission gear set (33) is arranged on the outer wall of a paw seat (3103) of the manipulator assembly (31), the rotary transmission gear set (33) is connected with a speed reducer, and the speed reducer is connected with a servo motor;
in the manipulator assembly (31), at least two claws (3101) are hinged with a claw seat (3103) positioned at the inner side, a claw rod (3105) is arranged at the tail end of the claw (3101), and one side, close to the axis, of the claw rod (3105) is an inclined plane;
A manipulator sliding block (3106) is arranged between the gripper bars (3105), the manipulator sliding block (3106) is contacted with the inclined plane, and the manipulator sliding block (3106) is connected with an opening and closing hydraulic cylinder (35) fixedly arranged at the tail end of the gripper seat (3103);
At least one tension spring (3108) is arranged between the hand claw rods (3105);
A paw seat groove (3104) for allowing a paw rod (3105) to pass through is formed in the paw seat (3103);
The two sides of the manipulator sliding block (3106) positioned on the hand claw rod (3105) are provided with raised baffle plates (3107);
The opening and closing hydraulic cylinder (35) is arranged in the paw seat (3103);
In the roll forging device, an upper circular arc extrusion die (4) and a lower circular arc extrusion die (5) are arranged in parallel, the upper circular arc extrusion die (4) and the lower circular arc extrusion die (5) are driven to rotate by a driving device, and a die cavity is arranged on the surfaces of the upper circular arc extrusion die (4) and the lower circular arc extrusion die (5);
The mold cavities are arranged in a plurality along the axis.
2. The automatic roll forging device for connecting rods according to claim 1, wherein: pins are arranged on two sides of the free end of the hand claw rod (3105), and each tension spring (3108) is connected with the pin.
3. The automatic roll forging device for connecting rods according to claim 1, wherein: the cross section of the paw (3101) is C-shaped;
Or the cross section of the two claws (3101) is hexagonal.
4. The automatic roll forging device for connecting rods according to claim 1, wherein: a grip inner pad (3102) for heat insulation and thickness adjustment is provided on the inner side of the grip (3101).
5. The automatic roll forging device for connecting rods according to claim 1, wherein: the head end of the paw seat (3103) is also provided with a buffer heat insulation pad (3109).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103408.XA CN108405781B (en) | 2018-02-01 | 2018-02-01 | Automatic roll forging device for connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103408.XA CN108405781B (en) | 2018-02-01 | 2018-02-01 | Automatic roll forging device for connecting rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108405781A CN108405781A (en) | 2018-08-17 |
| CN108405781B true CN108405781B (en) | 2024-08-13 |
Family
ID=63127729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810103408.XA Active CN108405781B (en) | 2018-02-01 | 2018-02-01 | Automatic roll forging device for connecting rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108405781B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109226632A (en) * | 2018-11-07 | 2019-01-18 | 天润曲轴股份有限公司 | Roll forging lathe support device |
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| CN2516324Y (en) * | 2001-11-07 | 2002-10-16 | 舒良 | Manipulator |
| JP5150608B2 (en) * | 2009-11-20 | 2013-02-20 | 株式会社アルバック | Conveying device and vacuum device |
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| CN204381275U (en) * | 2015-01-15 | 2015-06-10 | 西安科技大学 | A kind of robot device for flat-die forging |
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| CN206406058U (en) * | 2017-01-14 | 2017-08-15 | 张子和 | A kind of mechanical automation arm |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166614A (en) * | 2011-01-04 | 2011-08-31 | 武汉理工大学 | Method and production line for forging forged piece of automobile rear axle driving spiral bevel gear |
| CN203253867U (en) * | 2013-05-20 | 2013-10-30 | 聊城市新联机械有限公司 | Hydraulic clamping rotary mechanical hand for forging manipulator |
| CN203293207U (en) * | 2013-05-31 | 2013-11-20 | 安徽省巢湖铸造厂有限责任公司 | Feeding mechanical arm of elastic strip forming machine |
| CN104841835A (en) * | 2015-05-22 | 2015-08-19 | 芜湖陀曼精机科技有限公司 | Griping manipulator for high-temperature forging pieces |
| CN207887812U (en) * | 2018-02-01 | 2018-09-21 | 湖北三峡职业技术学院 | The automatic roll forging device of connecting rod |
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| CN108405781A (en) | 2018-08-17 |
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