CN218049773U - Dual-drive pipe bending mechanism for pipe bending machine - Google Patents
Dual-drive pipe bending mechanism for pipe bending machine Download PDFInfo
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- CN218049773U CN218049773U CN202220876653.6U CN202220876653U CN218049773U CN 218049773 U CN218049773 U CN 218049773U CN 202220876653 U CN202220876653 U CN 202220876653U CN 218049773 U CN218049773 U CN 218049773U
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Abstract
The utility model relates to a bending machine field, concretely relates to dual drive pipe bending mechanism for bending machine, including the equipment main part, equipment main part upper surface is close to a side edge position movable mounting has the controller, the equipment main part upper surface is close to central point and puts and be provided with spacing module. The utility model discloses in, slope in the middle of the roll axis and No. two roll axes, therefore, tubular product receives the middle low valley department that gravity influence can the landing to spacing module, just can cooperate slidable slider to promote tubular product after that, and tubular product and roll axis and No. two roll axis roll connections, frictional force when tubular product moves on spacing module has been reduced, thereby make the staff can push away tubular product appointed position along spacing module in the time of the material loading, solve the inconvenient problem of equipment material loading, and can also reduce the burden of drive structure through the dual drive module of bending that sets up, further prolong the life of equipment.
Description
Technical Field
The utility model relates to a bending machine field, concretely relates to dual drive swan neck system for bending machine.
Background
The existing pipe bender is controlled by NC and braked by hydraulic pressure, has prefabrication of various different bending angles, has Chinese subtitle display and man-machine conversation type operation, can randomly select manual and semi-automatic operation modes, and has two functions of automatic and tight stop; but current bending machine has certain drawback when using, like current equipment when using, uses the rotation of single hydraulic stem completion axis of rotation and the reseing in later stage, has increased the burden of drive structure, and current equipment is inconvenient in the material loading, still needs the manual work to hold tubular product, and is inconvenient when leading to equipment use.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an: in order to solve the problems that the conventional pipe bending machine uses a single hydraulic rod to complete rotation of a rotating shaft and resetting in the later period, the burden of a driving structure is increased, the conventional equipment is inconvenient in feeding, and pipes need to be manually held, so that the equipment is inconvenient to use, and the dual-driving pipe bending mechanism for the pipe bending machine is provided.
The purpose of the utility model can be realized by the following technical proposal:
a dual-drive pipe bending mechanism for a pipe bending machine comprises an equipment main body, wherein a controller is movably mounted on the upper surface of the equipment main body close to one side edge position, a limiting module is arranged on the upper surface of the equipment main body close to a central position, a first hydraulic rod is fixedly mounted on the upper surface of the equipment main body close to a front surface position, a second hydraulic rod is movably mounted on one side of the first hydraulic rod in a direction, a third hydraulic rod is fixedly mounted on the front surface of the equipment main body, a plane bearing is arranged on the outer surface of the equipment main body, a bending module is arranged on the front surface of the equipment main body, as shown in figures 3 and 5, threaded holes are formed in the outer surface of a rotating shaft and the outer surface of a mounting frame, the rotating shaft and the mounting frame are fixed together through a threaded hole matched with a stud, the second hydraulic rod is started, and the output end of the second hydraulic rod is matched with a clamping block and is in close contact with a pipe, the output end of the third hydraulic rod pushes the fixed block through the pushing block, so that the second rack moves along the limiting strip, the second rack drives the gear to rotate clockwise, the second hydraulic rod makes circular motion by taking the rotating shaft as the axis, the bending wheel rotates by taking the rotating shaft as the axis, the pipe contacted with the bending wheel is bent, and meanwhile, the first rack is meshed with the gear, so that the motion direction of the first rack is opposite to that of the second rack, the first rack moves towards the inside of the equipment main body when the second rack extends out, the rear surface of the first rack is closely contacted with the fourth hydraulic rod, then the output end of the third hydraulic rod contracts, the pushing block is separated from the fixed block, the third hydraulic rod loses the fixing effect on the second rack, then the fourth hydraulic rod is started, the output end of the fourth hydraulic rod extends out to drive the first rack to move outwards along the limiting strip, make gear anticlockwise rotation and drive axis of rotation and installing frame synchronous revolution, drive No. two racks and remove to No. three hydraulic stem when gear anticlockwise rotation, make again and promote piece and fixed block contact, make No. four hydraulic stem output retractions after that, accomplish the work of resetting of the module of bending, above-mentioned structure makes a rack and No. four hydraulic stem and No. three hydraulic stem and No. two one-way acting of rack, only can do work to the gear when the output of No. three hydraulic stem or No. four hydraulic stem stretches out, be in no-load state when No. three hydraulic stem or No. four hydraulic stem output shrink, avoid the two-way load of drive assembly two-way acting to cause the connecting piece.
The method is further characterized in that: the device comprises a device body and is characterized in that the lower surface of the device body is provided with base feet which are fixedly arranged at positions close to four corners, the front surface of the device body is embedded with limiting strips which are fixedly arranged, and the number of the limiting strips is two.
The method is further characterized in that: spacing module includes sliding frame, slip strip, slider, gag lever post, a roll axis and No. two roll axes, the sliding frame with equipment main part upper surface is close to central point and puts fixed connection, the equal fixed mounting in sliding frame both sides surface has the slip strip, slip strip surface movable mounting has the slider, the slider front surface is close to central point and puts fixed mounting and have the gag lever post, sliding frame surface movable mounting has a roll axis, no. two roll axes of roll axis one side direction movable mounting.
The method is further characterized in that: the slider passes through sliding strip and sliding frame sliding connection, a roll axis and No. two roll axes all incline to the inside of sliding frame, when initial condition, no. two hydraulic stems are parallel with a hydraulic stem, two grip blocks are on same straight line, in the time of material loading, the staff will need the tubular product of bending to place spacing module on, because roll axis and No. two roll axial middle inclinations, therefore, tubular product receives the middle low valley department that gravity influence can the landing spacing module, just can cooperate slidable slider to promote tubular product after that, and tubular product and roll axis and No. two roll axis roll connections, frictional force when having reduced tubular product and moving on spacing module, thereby make the staff can push away two grip blocks one side with tubular product along spacing module in the time of material loading, solve the inconvenient problem of equipment material loading.
Further, the method comprises the following steps: no. two hydraulic stem surface fixed mounting have the installing frame, the output of No. two hydraulic stems and the output of a hydraulic stem all are provided with the grip block, the double-screw bolt is installed to installing frame surface screw thread.
Further, the method comprises the following steps: the module of bending includes axis of rotation, a rack, no. two racks, the wheel of bending, gear and spread groove, the flat faced bearing upper surface is provided with the axis of rotation, spacing outer surface movable mounting has a rack, another spacing outer surface movable mounting has No. two racks, the axis of rotation surface is close to upper end position fixed mounting and has the wheel of bending, axis of rotation outer surface fixed mounting has the gear, a rack and No. two racks and spacing correspond the position and seted up the spread groove.
Further, the method comprises the following steps: the axis of rotation with the installing frame passes through double-screw bolt fixed connection, rack, no. two racks all with gear engagement connects, a rack rear side is located the inside hydraulic stem No. four that is provided with of equipment main part, the output and the rack contact of No. four hydraulic stem, fixed surface installs the fixed block on No. two racks, the output fixed mounting of No. three hydraulic stem promotes the piece, promote the front surface of piece and the rear surface contact of fixed block, spacing surface movable mounting has a rack, and another spacing surface movable mounting has No. two racks, and the axis of rotation surface is close to upper end position fixed mounting and has the wheel of bending, and axis of rotation surface fixed mounting has the gear, and a rack and No. two racks and spacing corresponding position have seted up the spread groove.
The utility model has the advantages that:
1. through the arranged limiting module, the first rolling shaft and the second rolling shaft are inclined towards the middle, so that the pipe can slide to the middle valley of the limiting module under the influence of gravity, and then the pipe can be pushed by matching with the slidable sliding block, and the pipe is in rolling connection with the first rolling shaft and the second rolling shaft, so that the friction force of the pipe when the pipe moves on the limiting module is reduced, a worker can push the pipe to a specified position along the limiting module during feeding, and the problem of inconvenience in feeding of equipment is solved;
2. through the arranged bending module, the third hydraulic rod drives the gear to rotate clockwise through the second rack, so that the second hydraulic rod does circular motion by taking the rotating shaft as the shaft, and meanwhile, the first rack is meshed with the gear, so that the motion direction of the first rack is opposite to that of the second rack, the first rack moves towards the inside of the equipment main body when the second rack extends out, the rear surface of the first rack is closely contacted with the fourth hydraulic rod, then the output end of the third hydraulic rod contracts, the pushing block is separated from the fixed block, the third hydraulic rod loses the fixing effect on the second rack, then the fourth hydraulic rod is started, and the output end of the fourth hydraulic rod extends out to drive the first rack to move outwards along the limiting strip, make the gear anticlockwise rotation and drive axis of rotation and installing frame synchronous revolution, drive No. two racks and remove to No. three hydraulic stems when the gear anticlockwise rotation, make again and promote piece and fixed block contact, make No. four hydraulic stems output withdrawal after that, accomplish the work of resetting of the module of bending, above-mentioned structure makes a rack and No. four hydraulic stems and No. three hydraulic stems and No. two one-way acting of rack, only just can do work to the gear when the output of No. three hydraulic stems or No. four hydraulic stems stretches out, be in idle state when No. three hydraulic stems or No. four hydraulic stems output shrink, avoid the two-way acting of drive assembly to cause two-way load to the connecting piece.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic view of the split structure of the limiting module of the present invention;
fig. 2 is a schematic view of the overall structure of the present invention;
fig. 3 is a schematic view of the gear connection structure of the present invention;
fig. 4 is an enlarged view of fig. 1 at a;
fig. 5 is an enlarged view of the present invention at B in fig. 2.
In the figure: 1. an apparatus main body; 101. a seat leg; 102. a limiting strip; 2. a controller; 3. a limiting module; 301. a sliding frame; 302. a slide bar; 303. a slider; 304. a limiting rod; 305. a first rolling shaft; 306. a second rolling axis; 4. a first hydraulic rod; 5. a second hydraulic rod; 501. a clamping block; 502. installing a frame; 503. a stud; 6. a third hydraulic rod; 601. a fourth hydraulic rod; 7. a plane bearing; 8. bending the module; 801. a rotating shaft; 802. a first rack; 803. a second rack; 804. bending wheels; 805. a gear; 806. connecting grooves; 807. a fixed block; 808. and (4) pushing the block.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-5, a dual-drive pipe bending mechanism for a pipe bending machine comprises an apparatus main body 1, wherein a controller 2 is movably mounted on the upper surface of the apparatus main body 1 near one edge of the side, a limiting module 3 is arranged on the upper surface of the apparatus main body 1 near the center, a first hydraulic rod 4 is fixedly mounted on the upper surface of the apparatus main body 1 near the front surface, a second hydraulic rod 5 is movably mounted on one side of the first hydraulic rod 4, a third hydraulic rod 6 is fixedly mounted on the front surface of the apparatus main body 1, a plane bearing 7 is arranged on the outer surface of the apparatus main body 1, and a bending module 8 is arranged on the front surface of the apparatus main body 1; the lower surface of the equipment main body 1 is fixedly provided with seat legs 101 at positions close to four corners, the front surface of the equipment main body 1 is embedded with and fixedly provided with two limiting strips 102, and the number of the limiting strips 102 is two; the limiting module 3 comprises a sliding frame 301, a sliding strip 302, a sliding block 303, a limiting rod 304, a first rolling shaft 305 and a second rolling shaft 306, the upper surfaces of the sliding frame 301 and the device main body 1 are fixedly connected near the center position, the surfaces of the two sides of the sliding frame 301 are fixedly provided with the sliding strip 302, the outer surface of the sliding strip 302 is movably provided with the sliding block 303, the front surface of the sliding block 303 is fixedly provided with the limiting rod 304 near the center position, the outer surface of the sliding frame 301 is movably provided with the first rolling shaft 305, and the direction of one side of the first rolling shaft 305 is movably provided with the second rolling shaft 306; the sliding block 303 is connected with the sliding frame 301 through the sliding strip 302 in a sliding manner, the first rolling shaft 305 and the second rolling shaft 306 are inclined towards the inside of the sliding frame 301, in an initial state, the second hydraulic rod 5 and the first hydraulic rod 4 are parallel, the two clamping blocks 501 are on the same straight line, when feeding is performed, a worker places a pipe to be bent on the limiting module 3, and the first rolling shaft 305 and the second rolling shaft 306 are inclined towards the middle, so that the pipe can slide to the middle valley of the limiting module 3 under the influence of gravity, and then the pipe can be pushed by matching with the slidable sliding block 303, and the pipe is connected with the first rolling shaft 305 and the second rolling shaft 306 in a rolling manner, so that the friction force of the pipe moving on the limiting module 3 is reduced, the worker can push the pipe to one side of the two clamping blocks 501 along the limiting module 3 when feeding is performed, and the problem of inconvenience in feeding of equipment is solved; an installation frame 502 is fixedly installed on the outer surface of the second hydraulic rod 5, clamping blocks 501 are arranged at the output end of the second hydraulic rod 5 and the output end of the first hydraulic rod 4, and a stud 503 is installed on the outer surface of the installation frame 502 in a threaded mode; the bending module 8 comprises a rotating shaft 801, a first rack 802, a second rack 803, a bending wheel 804, a gear 805 and a connecting groove 806, the rotating shaft 801 is arranged on the upper surface of the plane bearing 7, the first rack 802 is movably arranged on the outer surface of one limiting strip 102, the second rack 803 is movably arranged on the outer surface of the other limiting strip 102, the bending wheel 804 is fixedly arranged on the outer surface of the rotating shaft 801 close to the upper end, the gear 805 is fixedly arranged on the outer surface of the rotating shaft 801, and the connecting groove 806 is formed in the positions, corresponding to the first rack 802, the second rack 803 and the limiting strip 102; a rotating shaft 801 and an installation frame 502 are fixedly connected through a stud 503, a first rack 802 and a second rack 803 are both meshed with a gear 805 and are respectively located on two sides of the gear 805, a fourth hydraulic rod 601 is arranged on the rear side of the first rack 802 inside the device main body 1, the output end of the fourth hydraulic rod 601 is contacted with the first rack 802, a fixed block 807 is fixedly mounted on the upper surface of the second rack 803, a pushing block 808 is fixedly mounted on the output end of a third hydraulic rod 6, the front surface of the pushing block 808 is contacted with the rear surface of the fixed block 807, the connection structure of the output end of the fourth hydraulic rod 601 and the first rack 802 is the same as the connection structure of the output end of the third hydraulic rod 6 and the second rack 803, the first rack 802 is movably mounted on the outer surface of a limiting bar 102, the second rack 803 is movably mounted on the outer surface of another limiting bar 102, a bending wheel 804 is fixedly mounted on the outer surface of the rotating shaft 801 near the upper end, a gear 805 is fixedly mounted on the outer surface of the rotating shaft 801, and a connecting groove 806 is formed in the corresponding position of the first rack 802, the second rack 802 and the limiting bar 102; as shown in fig. 3 and 5, threaded holes are respectively formed in the outer surface of the rotating shaft 801 and the outer surface of the mounting frame 502, the stud 503 is matched with the threaded holes to fix the rotating shaft 801 and the mounting frame 502 together, the second hydraulic rod 5 is started, the output end of the second hydraulic rod 5 is matched with the clamping block 501 to be closely contacted with a pipe, the output end of the third hydraulic rod 6 pushes the fixing block 807 through the pushing block 808, the second rack 803 moves along the limiting strip 102, the second rack 803 drives the gear 805 to rotate clockwise, the second hydraulic rod 5 makes circular motion by taking the rotating shaft 801 as an axis, the bending wheel 804 rotates by taking the rotating shaft 801 as an axis to bend the pipe contacted with the bending wheel 804, and meanwhile, the first rack 802 is meshed with the gear 805, therefore, the moving direction of the first rack 802 is opposite to that of the second rack 803, and the first rack 802 moves towards the inside the device body 1 when the second rack 803 extends out, the rear surface of the first rack 802 is closely contacted with the fourth hydraulic rod 601, the output end of the third hydraulic rod 6 is contracted, the pushing block 808 and the fixing block 807 are separated, the third hydraulic rod 6 loses the fixing effect on the second rack 803, the fourth hydraulic rod 601 is started, the output end of the fourth hydraulic rod 601 extends out to drive the first rack 802 to move outwards along the limiting strip 102, the gear 805 rotates anticlockwise and drives the rotating shaft 801 and the mounting frame 502 to synchronously rotate, the gear 805 rotates anticlockwise and simultaneously drives the second rack 803 to move towards the third hydraulic rod 6, the pushing block 808 is contacted with the fixing block 807 again, the output end of the fourth hydraulic rod 601 retracts, the reset work of the bending module 8 is completed, the structure enables the first rack 802 and the fourth hydraulic rod 601, the third hydraulic rod 6 and the second rack 803 to do work unidirectionally, the gear 805 is acted only when the output end of the third hydraulic rod 6 or the fourth hydraulic rod 601 extends out, and the output end of the third hydraulic rod 6 or the fourth hydraulic rod 601 is in an idle state when being contracted, so that bidirectional load on the connecting piece caused by bidirectional acting of the driving assembly is avoided.
The working principle is as follows: in an initial state, the second hydraulic rod 5 and the first hydraulic rod 4 are parallel, the two clamping blocks 501 are on the same straight line, when feeding, a worker places a pipe to be bent on the limiting module 3, because the first rolling shaft 305 and the second rolling shaft 306 incline towards the middle, the pipe can slide to the middle valley of the limiting module 3 under the influence of gravity, and then can be matched with the slidable sliding block 303 to push the pipe, and the pipe is connected with the first rolling shaft 305 and the second rolling shaft 306 in a rolling manner, so that the friction force of the pipe moving on the limiting module 3 is reduced, the worker can push the pipe to one side of the two clamping blocks 501 along the limiting module 3 when feeding, the problem of inconvenient feeding of equipment is solved, then the first hydraulic rod 4 is started, the output end of the first hydraulic rod 4 is matched with the clamping blocks 501 to push the pipe, the pipe is contacted with the bending wheel 804, the second hydraulic rod 5 is started, the output end of the second hydraulic rod 5 is matched with the clamping block 501 to be closely contacted with the pipe, the output end of the third hydraulic rod 6 pushes the fixing block 807 through the pushing block 808, the second rack 803 moves along the limiting strip 102, the second rack 803 drives the gear 805 to rotate clockwise, the second hydraulic rod 5 makes circular motion by taking the rotating shaft 801 as an axis, the bending wheel 804 rotates by taking the rotating shaft 801 as an axis to bend the pipe contacted with the bending wheel 804, and meanwhile, the first rack 802 is meshed and connected with the gear 805, so that the motion direction of the first rack 802 is opposite to that of the second rack 803, the first rack 802 moves towards the inside of the equipment main body 1 when the second rack 803 extends out, the rear surface of the first rack 802 is closely contacted with the fourth hydraulic rod 601, and then the output end of the third hydraulic rod 6 contracts, the pushing block 808 is separated from the fixing block 807, so that the third hydraulic rod 6 loses the fixing effect on the second rack 803, the fourth hydraulic rod 601 is started, the output end of the fourth hydraulic rod 601 extends out to drive the first rack 802 to move outwards along the limiting strip 102, the gear 805 rotates anticlockwise and drives the rotating shaft 801 and the mounting frame 502 to rotate synchronously, the second rack 803 is driven to move towards the third hydraulic rod 6 while the gear 805 rotates anticlockwise, the pushing block 808 is contacted with the fixing block 807 again, then the output end of the fourth hydraulic rod 601 retracts, and the resetting work of the bending module 8 is completed.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only, and it is intended that all such modifications, additions and substitutions as would be apparent to one skilled in the art to the specific embodiments described are within the scope of the invention as claimed.
Claims (7)
1. The utility model provides a dual drive return bend mechanism for bending machine, includes equipment main part (1), its characterized in that, equipment main part (1) upper surface is close to a side edge position movable mounting and has controller (2), equipment main part (1) upper surface is close to central point and puts and be provided with spacing module (3), equipment main part (1) upper surface is close to preceding surface position fixed mounting and has hydraulic stem (4) No. one, hydraulic stem (4) one side direction movable mounting has hydraulic stem (5) No. two, surface fixed mounting has hydraulic stem (6) No. three before equipment main part (1), equipment main part (1) surface is provided with flat bearing (7), equipment main part (1) front surface is provided with bending module (8).
2. The dual-drive pipe bending mechanism for the pipe bending machine according to claim 1, wherein the lower surface of the apparatus main body (1) is fixedly provided with base legs (101) at positions close to four corners, the front surface of the apparatus main body (1) is fixedly provided with two limiting strips (102) in an embedded manner, and the number of the limiting strips (102) is two.
3. The dual-drive pipe bending mechanism for the pipe bending machine according to claim 2, wherein the limiting module (3) comprises a sliding frame (301), a sliding strip (302), a sliding block (303), a limiting rod (304), a first rolling shaft (305) and a second rolling shaft (306), the sliding frame (301) and the upper surface of the equipment main body (1) are fixedly connected near a central position, the sliding strip (302) is fixedly mounted on the surfaces of two sides of the sliding frame (301), the sliding block (303) is movably mounted on the outer surface of the sliding strip (302), the limiting rod (304) is fixedly mounted on the front surface of the sliding block (303) near the central position, the rolling shaft (305) is movably mounted on the outer surface of the sliding frame (301), and the rolling shaft (306) is movably mounted on one side of the first rolling shaft (305).
4. The dual-drive pipe bending mechanism for the pipe bending machine according to claim 3, wherein the slider (303) is slidably connected with the sliding frame (301) through a sliding strip (302), and the first rolling shaft (305) and the second rolling shaft (306) are both inclined towards the inside of the sliding frame (301).
5. The dual-drive pipe bending mechanism for the pipe bending machine according to claim 4, wherein a mounting frame (502) is fixedly mounted on the outer surface of the second hydraulic rod (5), clamping blocks (501) are arranged at the output end of the second hydraulic rod (5) and the output end of the first hydraulic rod (4), and a stud (503) is mounted on the outer surface of the mounting frame (502) in a threaded manner.
6. The dual-drive pipe bending mechanism for the pipe bending machine according to claim 5, wherein the bending module (8) comprises a rotating shaft (801), a first rack (802), a second rack (803), a bending wheel (804), a gear (805) and a connecting groove (806), the rotating shaft (801) is arranged on the upper surface of the flat bearing (7), the first rack (802) is movably mounted on the outer surface of the limiting strip (102), the second rack (803) is movably mounted on the outer surface of the limiting strip (102), the bending wheel (804) is fixedly mounted on the outer surface of the rotating shaft (801) close to the upper end, the gear (805) is fixedly mounted on the outer surface of the rotating shaft (801), and the connecting groove (806) is formed in corresponding positions of the first rack (802), the second rack (803) and the limiting strip (102).
7. The dual-drive pipe bending mechanism for the pipe bending machine according to claim 6, wherein the rotating shaft (801) and the mounting frame (502) are fixedly connected through a stud (503), the first rack (802) and the second rack (803) are both meshed with the gear (805), a fourth hydraulic rod (601) is arranged at the rear side of the first rack (802) and located inside the device main body (1), a fixing block (807) is fixedly installed on the upper surface of the second rack (803), a pushing block (808) is fixedly installed at the output end of the third hydraulic rod (6), the front surface of the pushing block (808) is in contact with the rear surface of the fixing block (807), and the connection structure of the output end of the fourth hydraulic rod (601) and the first rack (802) is the same as the connection structure of the output end of the third hydraulic rod (6) and the second rack (803).
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CN202220876653.6U CN218049773U (en) | 2022-04-15 | 2022-04-15 | Dual-drive pipe bending mechanism for pipe bending machine |
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CN202220876653.6U CN218049773U (en) | 2022-04-15 | 2022-04-15 | Dual-drive pipe bending mechanism for pipe bending machine |
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CN202220876653.6U Active CN218049773U (en) | 2022-04-15 | 2022-04-15 | Dual-drive pipe bending mechanism for pipe bending machine |
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