CN113560374A - Straightening device for shaft products without center hole - Google Patents
Straightening device for shaft products without center hole Download PDFInfo
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- CN113560374A CN113560374A CN202011331557.5A CN202011331557A CN113560374A CN 113560374 A CN113560374 A CN 113560374A CN 202011331557 A CN202011331557 A CN 202011331557A CN 113560374 A CN113560374 A CN 113560374A
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- 230000007246 mechanism Effects 0.000 claims abstract description 51
- 230000000694 effects Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention provides a straightening device for shaft products without a central hole, which comprises a tool platform, a supporting block, a swinging mechanism and a straightening pressure head, wherein the supporting block and the swinging mechanism are arranged on the top surface of the tool platform, the supporting block is arranged below the left end and the right end of a workpiece, the supporting block plays a role in supporting and fixing the workpiece, the straightening pressure head is arranged above the middle part of the workpiece, the straightening pressure head presses the workpiece downwards for straightening, a sliding assembly is arranged below the left end and the right end of the workpiece, the swinging mechanism is arranged on one side of the supporting block, and the swinging mechanism moves up and down along with the pressure of the straightening pressure head.
Description
Technical Field
The invention belongs to the technical field of shaft product processing, and particularly relates to a straightening device for a shaft product without a central hole.
Background
At present, irregular bending deformation can occur on slender shaft products after forging or heat treatment, and in order to ensure subsequent processing and reduce the reject ratio, rough correction is not needed to be carried out on shaft product blanks without central holes, so that the radial runout of the shaft products is ensured within a reasonable range. However, the prior art lacks a straightening tool for shaft products without a central hole, and the shaft products (in the invention, referred to as workpieces for short) are usually straightened by manpower, so that the straightening performance is low and the labor cost is high.
Disclosure of Invention
The invention provides a straightening device for shaft products without a central hole, which can effectively solve the problem of radial run-out of blanks of shaft products without a central hole, improve the straightening performance, reduce the labor cost and have wide applicability and popularization to shaft product production enterprises.
The technical scheme of the invention is realized as follows: the utility model provides a no centre bore axle type product coalignment, including the frock platform, the supporting shoe, swing mechanism and alignment pressure head, supporting shoe and swing mechanism all set up in the top surface of frock platform, the supporting shoe sets up in the below at both ends about the work piece, the supporting shoe plays the fixed effect of support to the work piece, the alignment pressure head sets up in the top at work piece middle part, the alignment pressure head pushes down the work piece and carries out the alignment, sliding assembly sets up in the below at both ends about the work piece, swing mechanism sets up in one side of supporting shoe, swing mechanism reciprocates along with the pressure of alignment pressure head.
The workpiece is placed on the top surface of the tool platform, the left end and the right end of the workpiece are placed above the supporting block, the left end and the right end of the workpiece are placed above the swinging mechanism, the workpiece is rotated, when the part of the workpiece needing to be straightened is found, the workpiece is dragged to move to the part to be straightened and placed below the straightening pressure head, the straightening pressure head is started, downward pressure is generated on the workpiece, the workpiece is straightened, the swinging mechanism swings along with the pressure of the straightening pressure head, and the workpiece is buffered.
In a preferred embodiment, the top surface of the support block is in a downwardly concave V-shaped configuration.
The supporting blocks arranged in the V shape are used for increasing the contact area between the supporting blocks and the workpiece.
As a preferred embodiment, the swing mechanism comprises a bottom plate, a supporting seat, a bearing support and a spring, wherein the bottom plate is arranged on the top surface of the tooling platform, the supporting seat is arranged at the front end of the top surface of the bottom plate and is in a U-shaped arrangement with an upward opening, one end of the bearing support is arranged in the supporting seat and is rotatably connected with the supporting seat through a pin shaft, the other end of the bearing support is arranged below a workpiece, and the bearing support is elastically connected with the bottom plate through the spring.
As a preferred embodiment, the swing mechanism further comprises a second bearing, a bearing reducing sleeve and a second bearing pin, the bearing support is arranged in a U shape with a backward opening, the second bearing is arranged in the opening, the second bearing comprises two identical bearings, the two second bearings are sequentially arranged in the opening, the second bearing and the bearing support are rotatably connected through the second bearing pin, the bearing reducing sleeve is arranged on the outer side of the second bearing, the top surface of the spring is fixedly connected with the bottom surface of the bearing support, and the bottom surface of the spring is fixedly connected with the top surface of the bearing support.
When the spring is positioned at the initial position, the height of the second bearing is higher than that of the bottom end of the V-shaped top surface of the supporting block, after a workpiece is placed, the left end and the right end of the workpiece are arranged above the second bearing, and is abutted against the bearing reducing sleeve, when the workpiece is rotated, the second bearing rotates along with the workpiece, the external force required by rotating the workpiece is reduced, when the part to be straightened is found by rotating, the workpiece is moved to be arranged below the straightening pressure head, the straightening pressure head can be connected with a hydraulic cylinder, the straightening pressure head generates downward pressure on the workpiece, the workpiece generates downward pressure on the swinging mechanism, the spring is compressed under the force, the downward pressure of the straightening pressure head is buffered, the possibility that the workpiece is deformed due to overlarge pressure is reduced, the supporting block plays a role in supporting and fixing the workpiece, and the supporting block, the swing mechanism and the straightening pressure head are matched with each other, so that the workpiece is straightened.
As a preferred embodiment, the swing mechanism and the tool platform are connected in a sliding manner through a sliding mechanism.
As a preferred embodiment, the sliding mechanism comprises a sliding rod, a rod sleeve and a moving assembly, the sliding rod is arranged above the bottom plate, the sliding rod and the tooling platform are arranged in parallel, the rod sleeve is fixedly arranged on the top surface of the bottom plate, the rod sleeve is slidably sleeved on the outer side of the sliding rod, the rod sleeve and the sliding rod are fixedly connected through a locking bolt, the moving assembly is fixedly arranged on the front side and the rear side of the bottom plate, and the moving assembly is slidably connected with the tooling platform.
As a preferred embodiment, the moving assembly comprises a sliding block, a first bearing and a first bearing pin, the sliding block is fixedly arranged on the front side and the rear side of the bottom plate, the first bearing is arranged on the left end and the right end of the sliding block, the first bearing and the sliding block are rotatably connected through the first bearing pin, and the first bearing and the tooling platform are connected in a sliding mode.
As a preferred embodiment, the top surface of the tooling platform is provided with a guide groove in a downward concave manner, the guide groove is arranged along the length direction of the tooling platform, the bottom surface of the bottom plate is fixedly provided with a first guide key, and the first guide key and the guide groove are arranged in a sliding connection manner.
In a preferred embodiment, a second guide key is fixedly arranged on the bottom surface of the supporting block, and the second guide key and the guide groove are slidably connected.
In a preferred embodiment, the bottom surface of the straightening pressure head is in an upwardly concave arc shape.
After a workpiece is placed in the tool platform, the support block can be adjusted according to the lengths of the left end and the right end of the workpiece, the support block is moved, the second guide key slides in the guide groove, meanwhile, the swing mechanism can be adjusted according to the lengths of the left end and the right end of the workpiece, the bottom plate is moved, the first guide key slides in the guide groove, the rod sleeve slides outside the slide rod, the slide block slides on the top surface of the tool platform, when the slide block moves to a proper position, the tightening bolt is screwed, the swing mechanism is fixed, and the guide groove is used for limiting the moving direction of the support block and the swing mechanism.
After the technical scheme is adopted, the invention has the beneficial effects that:
the workpiece is placed on the top surface of the tool platform, the left end and the right end of the workpiece are placed above the supporting block, the left end and the right end of the workpiece are placed above the swing mechanism, the workpiece is rotated, when the part of the workpiece needing to be straightened is found, the workpiece is dragged to move to the part to be straightened and placed below the straightening pressure head, the straightening pressure head is started, downward pressure is generated on the workpiece, the workpiece is straightened, the swing mechanism swings along with the pressure of the straightening pressure head, and the workpiece is buffered.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a side view of the swing mechanism.
In the figure, 1-a tooling platform; 2-a support block; 3-a swing mechanism; 4-a sliding mechanism; 5-straightening a pressure head; 6-a guide groove; 7-a first guide key; 8-a second guide key; 30-a bottom plate; 31-a support seat; 32-a bearing support; 33-a spring; 34-a second bearing; 35-bearing reducing sleeve; 40-a slide bar; 41-rod sleeve; 42-locking bolt; 43-a slide block; 44-first bearing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Combine fig. 1 and fig. 2 to show, a no centre bore axle type product coalignment, including frock platform 1, supporting shoe 2, swing mechanism 3 and alignment pressure head 5, supporting shoe 2 and swing mechanism 3 all set up in frock platform 1's top surface, supporting shoe 2 sets up in the below at both ends about the work piece, supporting shoe 2 plays the fixed effect of support to the work piece, alignment pressure head 5 sets up in the top at work piece middle part, alignment pressure head 5 pushes down the work piece and aligns, sliding assembly sets up in the below at both ends about the work piece, swing mechanism 3 sets up in one side of supporting shoe 2, swing mechanism 3 reciprocates along with alignment pressure head 5's pressure.
The workpiece is placed on the top surface of the tool platform 1, the left end and the right end of the workpiece are placed above the supporting block 2, the left end and the right end of the workpiece are placed above the swing mechanism 3, the workpiece is rotated until the part of the workpiece needing to be straightened is found, the workpiece is dragged to move to the part to be straightened to be placed below the straightening pressure head 5, the straightening pressure head 5 is started to generate downward pressure on the workpiece, and the swing mechanism 3 swings along with the pressure of the straightening pressure head 5 to play a role in buffering the workpiece. In this embodiment, can be at 1 side-mounting of frock platform and detect the device of alignment effect for the alignment of alignment position has been realized through the pressure of alignment pressure head 5 to more quick detection.
The top surface of the supporting block 2 is arranged in a downward sunken V shape. The support blocks 2 arranged in a V shape are used to increase the contact area between the support blocks 2 and the workpiece.
The swing mechanism 3 comprises a bottom plate 30, a supporting seat 31, a bearing support 32 and a spring 33, wherein the bottom plate 30 is arranged on the top surface of the tooling platform 1, the supporting seat 31 is arranged at the front end of the top surface of the bottom plate 30, the supporting seat 31 is in a U-shaped arrangement with an upward opening, one end of the bearing support 32 is arranged in the supporting seat 31 and is rotatably connected with the supporting seat 31 through a pin shaft, the other end of the bearing support 32 is arranged below a workpiece, and the bearing support 32 is elastically connected with the bottom plate 30 through the spring 33.
When the spring 33 is at the initial position, the height of the second bearing 34 is higher than that of the bottom end of the V-shaped top surface of the supporting block 2, after a workpiece is placed, the left end and the right end of the workpiece are placed above the second bearing 34 and are abutted against the bearing reducing sleeve 35, when the workpiece is rotated, the second bearing 34 rotates along with the workpiece, external force required for rotating the workpiece is reduced, when the workpiece is rotated to find a part to be straightened, the workpiece is moved to be placed below the straightening pressure head 5, the straightening pressure head 5 can be connected with a hydraulic cylinder, the straightening pressure head 5 generates downward pressure on the workpiece, the workpiece generates downward pressure on the swing mechanism 3, the spring 33 is compressed under force, the downward pressure on the straightening pressure head 5 is buffered, the possibility that the workpiece is deformed due to overlarge pressure is reduced, the supporting block 2 plays a role of supporting and fixing the workpiece, and the supporting block 2, the swing mechanism 3 and the straightening pressure head 5 are matched, the work of straightening the workpiece is realized.
The swing mechanism 3 is connected with the tool platform 1 in a sliding mode through the sliding mechanism 4. The sliding mechanism 4 comprises a sliding rod 40, a rod sleeve 41 and a moving assembly, the sliding rod 40 is arranged above the bottom plate 30, the sliding rod 40 and the tooling platform 1 are arranged in parallel, the rod sleeve 41 is fixedly arranged on the top surface of the bottom plate 30, the rod sleeve 41 is slidably sleeved on the outer side of the sliding rod 40, the rod sleeve 41 and the sliding rod 40 are fixedly connected through a locking bolt 42, the moving assembly is fixedly arranged on the front side and the rear side of the bottom plate 30, and the moving assembly is slidably connected with the tooling platform 1.
The moving assembly comprises a sliding block 43, a first bearing 44 and a first bearing pin, the sliding block 43 is fixedly arranged on the front side and the rear side of the bottom plate 30, the first bearing 44 is arranged on the left end and the right end of the sliding block 43, the first bearing 44 is rotatably connected with the sliding block 43 through the first bearing pin, and the first bearing 44 is slidably connected with the tooling platform 1.
The top surface undercut of frock platform 1 is provided with guide way 6, and guide way 6 sets up along the length direction of frock platform 1, the fixed first guide key 7 that is provided with in bottom surface of bottom plate 30, sliding connection sets up between first guide key 7 and the guide way 6. The bottom surface of supporting shoe 2 is fixed and is provided with second guide key 8, and sliding connection sets up between second guide key 8 and the guide way 6. The bottom surface of the straightening pressure head 5 is in an upward concave arc shape.
After the workpiece is placed in the invention, the supporting block 2 can be adjusted according to the lengths of the left end and the right end of the workpiece, the supporting block 2 is moved, the second guide key 8 slides in the guide groove 6, meanwhile, the swinging mechanism 3 can be adjusted according to the lengths of the left end and the right end of the workpiece, the bottom plate 30 is moved, the first guide key 7 slides in the guide groove 6, the rod sleeve 41 slides outside the slide rod 40, the slide block 43 slides on the top surface of the tool platform 1, when the workpiece is moved to a proper position, the tightening bolt is screwed down, namely, the fixing of the swing mechanism 3 is realized, the guide groove 6 is used for limiting the moving directions of the supporting blocks 2 and the swing mechanism 3, the invention realizes the adjustment of the distance between the two supporting blocks 2 and the adjustment of the distance between the two swing mechanisms 3, the workpiece straightening device is used for better supporting and fixing the workpiece and is matched with the straightening pressure head 5 to realize the straightening work of the workpiece.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a no centre bore axle type product coalignment, its characterized in that, includes frock platform, supporting shoe, swing mechanism and alignment pressure head, supporting shoe and swing mechanism all set up in the top surface of frock platform, the supporting shoe sets up in the below at both ends about the work piece, the supporting shoe plays the fixed effect of support to the work piece, the alignment pressure head sets up in the top at work piece middle part, the alignment pressure head pushes down the work piece and carries out the alignment, the slip subassembly sets up in the below at both ends about the work piece, swing mechanism sets up in one side of supporting shoe, swing mechanism reciprocates along with the pressure of pressure head.
2. The straightening device for shaft products without a central hole according to claim 1, wherein the top surface of the supporting block is arranged in a downward-concave V shape.
3. The straightening device for shaft products without a central hole according to claim 1, wherein the swinging mechanism comprises a bottom plate, a supporting seat, a bearing bracket and a spring, wherein the bottom plate is arranged on the top surface of the tooling platform, the supporting seat is arranged at the front end of the top surface of the bottom plate, the supporting seat is arranged in a U-shaped manner with an upward opening, one end of the bearing bracket is arranged in the supporting seat and is rotatably connected with the supporting seat through a pin shaft, the other end of the bearing bracket is arranged below the workpiece, and the bearing bracket is elastically connected with the bottom plate through the spring.
4. The straightening device for the shaft products without the central hole according to claim 3, wherein the swing mechanism further comprises a second bearing, a bearing reducing sleeve and a second bearing pin, the bearing support is arranged in a U shape with a backward opening, the second bearing is arranged in the opening, the second bearing comprises two identical bearings, the two second bearings are sequentially arranged in the opening, the second bearing and the bearing support are rotatably connected through the second bearing pin, the bearing reducing sleeve is arranged on the outer side of the second bearing, the top surface of the spring is fixedly connected with the bottom surface of the bearing support, and the bottom surface of the spring is fixedly connected with the top surface of the bearing support.
5. The straightening device for shaft products without the central hole according to claim 3, wherein the swinging mechanism is connected with the tooling platform in a sliding manner through a sliding mechanism.
6. The straightening device for the shaft products without the central hole according to claim 5, wherein the sliding mechanism comprises a sliding rod, a rod sleeve and a moving assembly, the sliding rod is arranged above the bottom plate, the sliding rod and the tooling platform are arranged in parallel, the rod sleeve is fixedly arranged on the top surface of the bottom plate, the rod sleeve is slidably sleeved outside the sliding rod, the rod sleeve and the sliding rod are fixedly connected through a locking bolt, the moving assembly is fixedly arranged on the front side and the rear side of the bottom plate, and the moving assembly is slidably connected with the tooling platform.
7. The straightening device for the shaft products without the central hole according to claim 6, wherein the moving assembly comprises a sliding block, a first bearing and a first bearing pin, the sliding block is fixedly arranged on the front side and the rear side of the base plate, the first bearing is arranged on the left end and the right end of the sliding block, the first bearing is rotatably connected with the sliding block through the first bearing pin, and the first bearing is slidably connected with the tool platform.
8. The straightening device for shaft products without the central hole according to claim 3, wherein a guide groove is formed in the top surface of the tool platform in a downward concave manner, the guide groove is formed in the length direction of the tool platform, a first guide key is fixedly arranged on the bottom surface of the bottom plate, and the first guide key and the guide groove are arranged in a sliding connection manner.
9. The straightening device for shaft products without a central hole according to claim 8, wherein a second guide key is fixedly arranged on the bottom surface of the supporting block, and the second guide key and the guide groove are slidably connected.
10. The straightening device for shaft products without a central hole according to claim 1, wherein the bottom surface of the straightening pressure head is in an upwardly concave arc shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011331557.5A CN113560374A (en) | 2020-11-24 | 2020-11-24 | Straightening device for shaft products without center hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011331557.5A CN113560374A (en) | 2020-11-24 | 2020-11-24 | Straightening device for shaft products without center hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113560374A true CN113560374A (en) | 2021-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011331557.5A Pending CN113560374A (en) | 2020-11-24 | 2020-11-24 | Straightening device for shaft products without center hole |
Country Status (1)
| Country | Link |
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| CN (1) | CN113560374A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114210774A (en) * | 2021-12-17 | 2022-03-22 | 上海钧正机械设备有限公司 | Elastic support for straightening machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5839315A (en) * | 1996-11-20 | 1998-11-24 | Eitel Presses, Inc. | Bend-straightening machine |
| CN201693033U (en) * | 2010-02-08 | 2011-01-05 | 浙江省永康市鸿运实业有限公司 | Axle quick straightening device |
| CN201791787U (en) * | 2010-09-29 | 2011-04-13 | 北京长宇利华液压系统工程设计有限公司 | Semi-automatic cold-drawn steel tube straightener |
| CN203184368U (en) * | 2013-04-02 | 2013-09-11 | 温州市冠盛汽车零部件集团股份有限公司 | Transmission shaft straightener platform |
| CN204338615U (en) * | 2014-12-25 | 2015-05-20 | 湖北新冶钢汽车零部件有限公司 | A kind of cam axle straightening machine |
| CN206153326U (en) * | 2016-11-16 | 2017-05-10 | 长春市美科汽车零部件有限公司 | An axle type straightener frock |
| CN206997409U (en) * | 2017-07-28 | 2018-02-13 | 徐州金鼎恒立液压件有限公司 | Long heavy oil cylinder barrel coalignment |
| CN207806253U (en) * | 2018-01-12 | 2018-09-04 | 青岛大昌泰克机械有限公司 | A kind of forcing press alignment tooling |
-
2020
- 2020-11-24 CN CN202011331557.5A patent/CN113560374A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5839315A (en) * | 1996-11-20 | 1998-11-24 | Eitel Presses, Inc. | Bend-straightening machine |
| CN201693033U (en) * | 2010-02-08 | 2011-01-05 | 浙江省永康市鸿运实业有限公司 | Axle quick straightening device |
| CN201791787U (en) * | 2010-09-29 | 2011-04-13 | 北京长宇利华液压系统工程设计有限公司 | Semi-automatic cold-drawn steel tube straightener |
| CN203184368U (en) * | 2013-04-02 | 2013-09-11 | 温州市冠盛汽车零部件集团股份有限公司 | Transmission shaft straightener platform |
| CN204338615U (en) * | 2014-12-25 | 2015-05-20 | 湖北新冶钢汽车零部件有限公司 | A kind of cam axle straightening machine |
| CN206153326U (en) * | 2016-11-16 | 2017-05-10 | 长春市美科汽车零部件有限公司 | An axle type straightener frock |
| CN206997409U (en) * | 2017-07-28 | 2018-02-13 | 徐州金鼎恒立液压件有限公司 | Long heavy oil cylinder barrel coalignment |
| CN207806253U (en) * | 2018-01-12 | 2018-09-04 | 青岛大昌泰克机械有限公司 | A kind of forcing press alignment tooling |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114210774A (en) * | 2021-12-17 | 2022-03-22 | 上海钧正机械设备有限公司 | Elastic support for straightening machine |
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