CN114309421A - Mould is used in bearing forging production - Google Patents
Mould is used in bearing forging production Download PDFInfo
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- CN114309421A CN114309421A CN202111350237.9A CN202111350237A CN114309421A CN 114309421 A CN114309421 A CN 114309421A CN 202111350237 A CN202111350237 A CN 202111350237A CN 114309421 A CN114309421 A CN 114309421A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- 238000005242 forging Methods 0.000 title claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 32
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 29
- 230000005540 biological transmission Effects 0.000 claims description 21
- 125000006850 spacer group Chemical group 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 13
- 238000009795 derivation Methods 0.000 claims description 7
- 230000013011 mating Effects 0.000 claims 5
- 238000000034 method Methods 0.000 abstract description 6
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 description 2
- 240000007643 Phytolacca americana Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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Abstract
The invention discloses a die for bearing forging production, and relates to the technical field of raw bearing forging. The bidirectional production die comprises a bidirectional production die pressurizing structure, a driven opposite-pressing structure and a movable guide die structure, wherein the driven opposite-pressing structure is arranged at two ends of the bidirectional production die pressurizing structure, and the movable guide die structure is carried on the inner side of the driven opposite-pressing structure. According to the invention, through the matching design of the bidirectional production die pressurizing structure and the driven counter-pressurizing structure, the device is convenient for achieving synchronous processing output of two sides through independent power supply, the power output structure for die processing is greatly reduced, the processing efficiency is improved, and through the design of the anti-counterforce pressing die structure, the device is convenient for completing the offset of counter-force generated in the processing process of the counter-die, and the counter-pressing die with long service life is formed by matching the design of the bidirectional production die pressurizing structure and the driven counter-pressurizing structure.
Description
Technical Field
The invention relates to the technical field of raw bearing forging, in particular to a die for bearing forging production.
Background
In order to forge a bearing, a corresponding processing die is often needed, but the existing die for forging the bearing has the following problems:
1. a plurality of power sources are often needed to deduce and apply stress to the die in a single direction, so that the power waste is serious;
2. unidirectional processing is often adopted in the processing process, and the processing efficiency is limited;
3. it is inconvenient to cancel the counter force generated by the die stamping.
Disclosure of Invention
The invention aims to provide a die for bearing forging production, which aims to solve the existing problems: often need a plurality of power supplies to accomplish to deduce to the mould on the unilateral and apply the atress, lead to the power waste serious.
In order to achieve the purpose, the invention provides the following technical scheme: the die for bearing forging production comprises a bidirectional production die pressurizing structure, a driven pressing structure and a movable guide die structure, wherein driven pressing structures are arranged at two ends of the bidirectional production die pressurizing structure, the movable guide die structure is mounted on the inner side of the driven pressing structure, and the driven pressing structure is used for completing the derivation of the movable guide die structure under the derivation of the bidirectional production die pressurizing structure, so that the stamping die at the middle position is completed;
the bidirectional production mold pressurizing structure comprises a guide limiting module and a power output module, wherein the power output module is arranged at the top end of the guide limiting module.
Preferably, guide spacing module includes that two carry on locating rack, first spacer pin, second spacer pin, first regulation guide slot, second adjust the guide slot and extend the stopper, two carry on the opposite direction of locating rack, carry on the inside first regulation guide slot and the second regulation guide slot of having all seted up in both sides of locating rack, the inboard welding of first regulation guide slot has the second spacer pin, the inboard welding of second regulation guide slot has first spacer pin, two the top of carrying on the locating rack all welds and has extended the stopper.
Preferably, the power output module includes assistance-localization real-time board, motor, stirring piece, atress stirring pole, spacing guide slot and cooperation round pin, extend the top fixedly connected with assistance-localization real-time board of stopper one end, screw fixedly connected with motor is passed through to assistance-localization real-time board's one end, the output fixedly connected with stirring piece of motor, assistance-localization real-time board keeps away from the one end fixedly connected with cooperation round pin of motor, the outside of cooperation round pin is rotated and is connected with the atress stirring pole, spacing guide slot has been seted up to the inboard of atress stirring pole, the outside and the spacing guide slot sliding connection of stirring piece.
Preferably, power take-off module still includes gear plate, first rack, slip push pedal, two-way transmission piece and second rack, the bottom fixedly connected with gear plate of atress poker rod, the top sliding connection who extends the stopper has the slip push pedal, the first rack of top fixedly connected with of slip push pedal, the bottom and the first rack toothing of gear plate are connected, the bottom of slip push pedal both sides all welds the transmission board, the bottom and the two-way transmission piece welded connection of transmission board, two-way transmission piece and the inboard sliding connection of carrying the locating rack, the second rack has all been welded to the both sides of two-way transmission piece.
Preferably, driven structure of counterpressing includes that the cooperation gear, first push away guide arm, second push away the guide arm, pushes away the guide block and the atress linkage pushes away the baffle, the cooperation gear rotates with the second spacer pin to be connected, the one end and the second rack toothing of cooperation gear are connected, the welding of one side of cooperation gear has first push away the guide arm, the outside of first spacer pin is rotated and is connected with the second and pushes away the guide arm, the second is deduced the pole and is kept away from one side of first spacer pin and one side that the cooperation gear was kept away from to first deduction pole and all is provided with and pushes away the guide block, the top joint that pushes away the guide block has the atress linkage to push away the baffle.
Preferably, the movable guide die structure comprises a die main body and a counter-force-resisting pressing die structure, wherein the die main body is arranged at one end of the counter-force-resisting pressing die structure.
Preferably, the anti-reaction pressure-exerting die structure comprises a second force-unloading module and a first force-unloading module, the top end and the bottom end of the second force-unloading module are fixedly connected with the stress linkage pushing guide plate, the first force-unloading module is arranged at one end of the second force-unloading module, and a die main body is arranged at one end of the first force-unloading module.
Preferably, the second unloads the power module and includes that first atress is spacing, polished rod, first spring, divides and leads slider, first power push rod and the first atress ejector pad of unloading, the inboard welding of first atress spacing has the polished rod, first atress spacing's top and bottom have all welded first spring, the polished rod is located the inboard of first spring, the outside sliding connection of polished rod has the branch to lead the slider, divide and lead one side of slider and rotate and be connected with first power push rod of unloading, first one side of unloading the power push rod is rotated and is connected with first power ejector pad, one side and the first power module fixed connection of unloading of first atress ejector pad.
Preferably, first power module of unloading includes that the second atress is spacing, built-in spacing pipe, second spring, second unload power push rod and second atress ejector pad, the inboard spacing pipe of inboard fixedly connected with of second atress spacing, the welding of one side of built-in spacing intraductal side has the second spring, the inboard sliding connection of built-in spacing pipe has the second to unload the power push rod, the second unloads one side welding of power push rod has the second atress ejector pad, the inboard sliding connection of second atress ejector pad and second atress spacing.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the matching design of the bidirectional production mold pressurizing structure and the driven counter-pressurizing structure, the device is convenient for achieving synchronous processing output at two sides through independent power supply, the power output structure for mold processing is greatly reduced, and the processing efficiency is improved;
2. according to the counter-force-resisting pressing device, through the design of the counter-force-resisting pressing die structure, the counter-force generated in the processing process of the counter-direction die can be offset conveniently, and the counter-direction stamping die with long service life is formed by matching the design of the bidirectional production die pressing structure and the driven counter-pressure structure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a side view of the present invention in its entirety;
FIG. 3 is a schematic view of a partial structure of a pressurization structure of the bi-directional production mold of the present invention;
FIG. 4 is a schematic view of a portion of the configuration of the guide and limit module and the power take-off module of the present invention;
FIG. 5 is a partial schematic view of the driven pressing structure of the present invention;
FIG. 6 is a partial structural view of the anti-counterforce pressing mold structure of the invention;
FIG. 7 is a schematic view of a second force-releasing module according to the present invention;
fig. 8 is a partial structural schematic view of the first force-releasing module of the present invention.
In the figure: 1. a bidirectional production mold pressurizing structure; 2. a driven counter-pressure structure; 3. a movable guide die structure; 4. a guide limit module; 5. a power output module; 6. carrying a positioning frame; 7. a first limit pin; 8. a second limit pin; 9. a first adjustment guide slot; 10. a second adjusting guide groove; 11. an extension limiting block; 12. an auxiliary positioning plate; 13. a motor; 14. a shifting block; 15. a force-applying poking rod; 16. a limiting guide groove; 17. a fitting pin; 18. a gear plate; 19. a first rack; 20. sliding the push plate; 21. a bidirectional transfer block; 22. a second rack; 23. a gear is matched; 24. a first push guide rod; 25. a second push rod; 26. a push guide block; 27. the guide plate is pushed in a forced linkage manner; 28. a second force-removing module; 29. a first force-relieving module; 30. a first stress limiting frame; 31. a polish rod; 32. a first spring; 33. a branch guide slide block; 34. a first force-relieving push rod; 35. a first stressed push block; 36. a second stress limiting frame; 37. a limit pipe is arranged in the device; 38. a second spring; 39. a second force-relieving push rod; 40. and the second stressed push block.
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.
Please refer to fig. 1-2:
a bearing forging production die comprises a bidirectional production die pressurizing structure 1, a driven counter-pressing structure 2 and a movable guide die structure 3, wherein the driven counter-pressing structures 2 are arranged at two ends of the bidirectional production die pressurizing structure 1, the movable guide die structure 3 is carried at the inner side of the driven counter-pressing structure 2, and the driven counter-pressing structure 2 is used for completing the derivation of the movable guide die structure 3 under the derivation of the bidirectional production die pressurizing structure 1, so that the stamping die at the middle position is completed;
please refer to fig. 3-4:
the bidirectional production mold pressurizing structure 1 comprises a guide limiting module 4 and a power output module 5, wherein the power output module 5 is arranged at the top end of the guide limiting module 4.
The guiding and limiting module 4 comprises two carrying and positioning frames 6, a first limiting pin 7, a second limiting pin 8, a first adjusting guide groove 9, a second adjusting guide groove 10 and an extending limiting block 11, the directions of the two carrying and positioning frames 6 are opposite, the first adjusting guide groove 9 and the second adjusting guide groove 10 are formed in the inner parts of two sides of the carrying and positioning frames 6, the second limiting pin 8 is welded on the inner side of the first adjusting guide groove 9, the first limiting pin 7 is welded on the inner side of the second adjusting guide groove 10, and the extending limiting blocks 11 are welded on the top ends of the two carrying and positioning frames 6;
the power output module 5 comprises an auxiliary positioning plate 12, a motor 13, a poking block 14, a stress poking rod 15, a limiting guide groove 16 and a matching pin 17, wherein the top end of one end of an extension limiting block 11 is fixedly connected with the auxiliary positioning plate 12, one end of the auxiliary positioning plate 12 is fixedly connected with the motor 13 through a screw, the output end of the motor 13 is fixedly connected with the poking block 14, one end of the auxiliary positioning plate 12, which is far away from the motor 13, is fixedly connected with the matching pin 17, the outer side of the matching pin 17 is rotatably connected with the stress poking rod 15, the inner side of the stress poking rod 15 is provided with the limiting guide groove 16, and the outer side of the poking block 14 is in sliding connection with the limiting guide groove 16;
the power output module 5 further comprises a gear plate 18, a first rack 19, a sliding push plate 20, a bidirectional transmission block 21 and a second rack 22, the bottom end of the stressed poke rod 15 is fixedly connected with the gear plate 18, the top end of the extension limiting block 11 is slidably connected with the sliding push plate 20, the top end of the sliding push plate 20 is fixedly connected with the first rack 19, the bottom end of the gear plate 18 is meshed with the first rack 19, the bottom ends of the two sides of the sliding push plate 20 are welded with the transmission plates, the bottom ends of the transmission plates are welded with the bidirectional transmission block 21, the bidirectional transmission block 21 is slidably connected with the inner side of the carrying positioning frame 6, and the two sides of the bidirectional transmission block 21 are welded with the second racks 22;
please refer to fig. 5:
the driven counter-pressure structure 2 comprises a matching gear 23, a first push-guide rod 24, a second push-guide rod 25, a push-out block 26 and a stress linkage push-guide plate 27, the matching gear 23 is rotatably connected with a second limiting pin 8, one end of the matching gear 23 is meshed with a second rack 22, the first push-guide rod 24 is welded on one side of the matching gear 23, the second push-guide rod 25 is rotatably connected on the outer side of the first limiting pin 7, the push-guide blocks 26 are arranged on one sides, away from the first limiting pin 7, of the second push-guide rod 25 and one sides, away from the matching gear 23, of the first push-guide rod 24, and the stress linkage push-guide plate 27 is clamped at the top end of the push-guide block 26;
torque output of a shifting block 14 is completed by controlling a motor 13, the shifting block 14 is connected with a limiting guide groove 16 in a sliding manner, so that the limiting guide groove 16 shifts a stressed shifting rod 15 in the rotating process, the stressed shifting rod 15 is shifted in a reciprocating manner by utilizing the rotating connection of the stressed shifting rod 15 and a matching pin 17, a gear plate 18 is driven by utilizing the stressed shifting rod 15 to complete the reciprocating shifting, the first rack 19 obtains reciprocating stress by utilizing the meshing connection of the gear plate 18 and a first rack 19, the stress is transmitted to a bidirectional transmission block 21 by utilizing the connection of a sliding push plate 20 and the first rack 19, so that the bidirectional transmission block 21 forms the reciprocating sliding, the bidirectional transmission block 21 is used for deducing a second rack 22 to perform displacement, the second rack 22 is connected with a matching gear 23 in a meshing manner, so that the matching gear 23 completes angle adjustment under the fluctuation of the second rack 22, the matching gear 23 is connected with the second limiting pin 8 in a rotating mode, so that the matching gear 23 completes angle adjustment under the stirring effect, the matching gear 23 and the second push guide rod 25 are synchronously assembled through the stress linkage push guide plate 27, the second push guide rod 25 and the first push guide rod 24 are synchronously stressed, angle change derivation is completed, derivation of opposite stress application of the movable guide die structure 3 is completed, punching is completed, due to the fact that the second rack 22 moves to the two reciprocating sides, the driven counter-pressing structures 2 on the two sides can be driven to perform reciprocating switching processing output, the device can conveniently achieve synchronous processing output of the two sides through independent power supply, the power output structure of die processing is greatly reduced, and processing efficiency is improved;
please refer to fig. 6-8:
the movable guide mould structure 3 comprises a mould main body and an anti-counterforce pressing mould structure, wherein the mould main body is arranged at one end of the anti-counterforce pressing mould structure;
the anti-counterforce pressure-applying die structure comprises a second force-unloading module 28 and a first force-unloading module 29, wherein the top end and the bottom end of the second force-unloading module 28 are fixedly connected with a stressed linkage push-guide plate 27, the first force-unloading module 29 is arranged at one end of the second force-unloading module 28, and a die main body is arranged at one end of the first force-unloading module 29;
the second force unloading module 28 comprises a first stress limiting frame 30, a polished rod 31, a first spring 32, a branch guide sliding block 33, a first force unloading push rod 34 and a first stress pushing block 35, the polished rod 31 is welded on the inner side of the first stress limiting frame 30, the first spring 32 is welded on the top end and the bottom end of the first stress limiting frame 30, the polished rod 31 is located on the inner side of the first spring 32, the branch guide sliding block 33 is connected on the outer side of the polished rod 31 in a sliding mode, one side of the branch guide sliding block 33 is rotatably connected with the first force unloading push rod 34, one side of the first force unloading push rod 34 is rotatably connected with the first stress pushing block 35, and one side of the first stress pushing block 35 is fixedly connected with the first force unloading module 29;
the first force unloading module 29 comprises a second stressed limiting frame 36, an internally-installed limiting pipe 37, a second spring 38, a second force unloading push rod 39 and a second stressed push block 40, the internally-installed limiting pipe 37 is fixedly connected to the inner side of the second stressed limiting frame 36, the second spring 38 is welded to one side of the inner side of the internally-installed limiting pipe 37, the second force unloading push rod 39 is slidably connected to the inner side of the internally-installed limiting pipe 37, the second force unloading push block 40 is welded to one side of the second force unloading push rod 39, and the second stressed push block 40 is slidably connected to the inner side of the second stressed limiting frame 36.
The stress generated in the stamping process of the die main body is transferred to the second force unloading push rod 39 through the second stress push block 40, the stress is applied to the second force unloading push rod 39 by the sliding of the second stress push block 40 at the inner side of the second stress limiting frame 36, the stress is extruded to the second spring 38 by the sliding of the second force unloading push rod 39 in the inner limiting tube 37, the first force unloading is completed, the rest of the stress is extruded to the first stress pushing block 35 through the second stress limiting frame 36, the first stress pushing block 35 is used for deducing the stress of the first force unloading pushing rod 34 to be separately guided and unfolded, so that the first force-unloading push rod 34 is stressed and extruded to the branch guide slide block 33, the force is extruded to the first spring 32 by utilizing the sliding of the branch guide slide block 33 at the polished rod 31, the force is offset by utilizing the elastic potential energy generated in the process of compressing the second spring 38 and the first spring 32, and the primary force unloading and the secondary force unloading are completed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The utility model provides a bearing forges production and uses mould which characterized in that: the bidirectional production mould pressing structure comprises a bidirectional production mould pressing structure (1), a driven pressing structure (2) and a movable guide mould structure (3), wherein the driven pressing structure (2) is arranged at each of two ends of the bidirectional production mould pressing structure (1), the movable guide mould structure (3) is loaded on the inner side of the driven pressing structure (2), and the driven pressing structure (2) is used for pushing the movable guide mould structure (3) under the pushing of the bidirectional production mould pressing structure (1);
the bidirectional production mold pressurizing structure (1) comprises a guide limiting module (4) and a power output module (5), and the power output module (5) is arranged at the top end of the guide limiting module (4).
2. The die for forging production of a bearing according to claim 1, wherein: guide spacing module (4) include two and carry on locating rack (6), first spacer pin (7), second spacer pin (8), first regulation guide slot (9), second regulation guide slot (10) and extend stopper (11), two carry on the opposite direction of locating rack (6), carry on the inside first regulation guide slot (9) and the second regulation guide slot (10) of having all seted up in both sides of locating rack (6), the inboard welding of first regulation guide slot (9) has second spacer pin (8), the inboard welding of second regulation guide slot (10) has first spacer pin (7), two the top of carrying on locating rack (6) all welds and extends stopper (11).
3. The die for forging production of a bearing according to claim 2, wherein: power take off module (5) is including assistance-localization real-time board (12), motor (13), stirring piece (14), atress stirring rod (15), spacing guide slot (16) and cooperation round pin (17), extend top fixedly connected with assistance-localization real-time board (12) of stopper (11) one end, screw fixedly connected with motor (13) is passed through to the one end of assistance-localization real-time board (12), output fixedly connected with stirring piece (14) of motor (13), the one end fixedly connected with cooperation round pin (17) of motor (13) are kept away from in assistance-localization real-time board (12), the outside of cooperation round pin (17) is rotated and is connected with atress stirring rod (15), spacing guide slot (16) have been seted up to the inboard of atress stirring rod (15), the outside and spacing guide slot (16) sliding connection of stirring piece (14).
4. The die for forging production of a bearing according to claim 3, wherein: power take off module (5) still includes gear plate (18), first rack (19), slip push pedal (20), two-way transmission piece (21) and second rack (22), the bottom fixedly connected with gear plate (18) of atress poker pole (15), the top sliding connection who extends stopper (11) has slip push pedal (20), the first rack (19) of top fixedly connected with of slip push pedal (20), the bottom and the meshing of first rack (19) of gear plate (18) are connected, the equal welding transmission board in bottom of slip push pedal (20) both sides, the bottom and two-way transmission piece (21) welded connection of transmission board, two-way transmission piece (21) and the inboard sliding connection of carrying locating rack (6), second rack (22) have all been welded to the both sides of two-way transmission piece (21).
5. The die for forging production of a bearing according to claim 4, wherein: driven structure (2) of counterpressing pushes away guide plate (27) including mating gear (23), first push away guide arm (24), second push away guide arm (25), derivation piece (26) and atress linkage, mating gear (23) rotates with second spacer pin (8) to be connected, the one end and the second rack (22) meshing of mating gear (23) are connected, one side welding of mating gear (23) has first push away guide arm (24), the outside of first spacer pin (7) is rotated and is connected with second push away guide arm (25), one side that first spacer pin (7) were kept away from in second push away guide arm (25) and one side that first push away guide arm (24) kept away from mating gear (23) all are provided with and push away guide block (26), the top joint that pushes away guide block (26) has atress linkage guide plate (27).
6. The die for forging production of a bearing according to claim 5, wherein: the movable guide die structure (3) comprises a die main body and an anti-counterforce pressing die structure, wherein the die main body is arranged at one end of the anti-counterforce pressing die structure.
7. The die for forging production of a bearing according to claim 6, wherein: prevent that counter-force mould structure of exerting pressure includes that the second unloads power module (28) and first power module (29) of unloading, the top and the bottom that the second unloaded power module (28) all push away baffle (27) fixed connection with the atress linkage, the one end that the second unloaded power module (28) is provided with first power module (29) of unloading, the one end of first power module (29) of unloading is provided with the mould main part.
8. The die for forging production of a bearing according to claim 7, wherein: the second unloads power module (28) and includes first atress spacing (30), polished rod (31), first spring (32), divides and leads slider (33), first atress push rod (34) and first atress ejector pad (35) of unloading, the inboard welding of first atress spacing (30) has polished rod (31), first spring (32) have all been welded to the top and the bottom of first atress spacing (30), polished rod (31) are located the inboard of first spring (32), the outside sliding connection of polished rod (31) has the branch to lead slider (33), divide and lead one side of slider (33) and rotate and be connected with first power push rod (34) of unloading, one side of first power push rod (34) of unloading is rotated and is connected with first atress ejector pad (35), one side and first power module (29) fixed connection of first atress ejector pad (35) of unloading.
9. The die for forging production of a bearing according to claim 8, wherein: first power module (29) of unloading includes that second atress spacing (36), built-in spacing pipe (37), second spring (38), second unload power push rod (39) and second atress ejector pad (40), inboard fixedly connected with of second atress spacing (36) installs the spacing pipe (37) in, the inboard one side welding of built-in spacing pipe (37) has second spring (38), the inboard sliding connection of built-in spacing pipe (37) has the second to unload power push rod (39), the second unloads one side welding of power push rod (39) has second atress ejector pad (40), second atress ejector pad (40) and the inboard sliding connection of second atress spacing (36).
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| CN202111350237.9A CN114309421A (en) | 2021-11-15 | 2021-11-15 | Mould is used in bearing forging production |
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| CN210676850U (en) * | 2019-08-20 | 2020-06-05 | 东莞祥宇金属制品有限公司 | Motorcycle engine shell casting mould |
| CN213570616U (en) * | 2020-10-12 | 2021-06-29 | 唐山赛尔特机电设备有限公司 | Heat treatment furnace hearth roll replacing device |
| CN214087450U (en) * | 2020-12-07 | 2021-08-31 | 天津滨渤智捷工程机械销售有限公司 | Automobile crane supporting device |
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