A kind of automobile pipeline branch line error-proof pre-welding equipment

By designing an automated welding equipment for automotive pipeline production, the problem of manual reliance on drilling and welding of main pipe holes in the prior art is solved, automated processing and welding are realized, and product quality and production efficiency are improved.

CN118752172BActive Publication Date: 2025-02-21HENAN SIKE AUTOMOBILE TECH CO LTD
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Patent Information

Application Number
CN202411250486.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-06
Publication Date
2025-02-21
Estimated Expiration
2044-09-06

AI Technical Summary

Technical Problem

In the existing automobile pipeline production process, the main pipe holes are prone to leak holes, and the welding process relies on manual labor, resulting in quality problems and poor welding effect, and the main pipe holes cannot be detected.

Method used

A kind of anti-error welding pre-welding equipment for automobile pipeline branches is designed, adopting a simple structure and easy operation design, including support table, workpiece support, welding press parts, resistive pre-welding parts, rotating brackets and workpiece conveyors. Automatic machining and welding is achieved through hydraulic and motor drive.

Benefits of technology

The equipment can automatically process and weld the workpiece, ensure the smooth flow of the main pipe and branch pipe, avoid manual errors, and improve production efficiency and product quality.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention discloses an anti-wrong welding pre-welding device for automobile pipeline branches, comprising a support table, mounting feet are arranged at four corners of the lower surface of the support table, a workpiece support is fixed in the middle of the upper surface of the support table, the upper surface of the workpiece support is provided with a groove for positioning the workpiece, and a workpiece fixing member for clamping and fixing the workpiece is arranged on both the front and rear sides of the upper surface of the support table, a welding pressing member is arranged on the upper surface of the support table, the welding pressing member is located on one side of the workpiece support, and a welding pressing member is arranged on the upper surface of the support table for driving the welding pressing member to slide, a resistance pre-welding member is arranged on the upper surface of the support table, the resistance pre-welding member is located above one end of the welding pressing member, a rotating bracket is arranged on the support table, the rotating bracket is located on one side of the workpiece support, the structure is simple, and the operation is easy, which can not only save a lot of manpower, but also can automatically process the workpiece, and can effectively prevent the problem that the workpiece main pipe and the workpiece branch pipe are not connected.
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Description

Technical Field

[0001] The invention relates to the technical field of automobile pipeline production, in particular to an automobile pipeline branch line error-proof pre-welding device. Background Art

[0002] The automobile engine cooling system requires pipes for circulation, and many pipes are connected to form a three-way loop. The three-way is connected in series to form a system loop to achieve the automobile cooling system and reduce the engine overload heat.

[0003] The existing process is to drill holes in the main pipe, then weld the branch pipes, and finally braze to complete the product. However, there is a situation where the main pipe holes are missed and then welded. This defect cannot be identified manually during the process, which ultimately causes major quality problems and customer complaints. The existing welding device has a complex structure and mainly relies on manual loading during welding, resulting in poor processing effect and inability to detect the holes in the main pipe. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a pre-welding device for preventing the wrong welding of automobile pipeline branches. The device has a simple structure and is easy to operate. It can not only save a lot of manpower, but also automatically process the workpiece, and can effectively prevent the problem of the workpiece main pipe and the workpiece branch pipe not being connected, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automobile pipeline branch anti-miswelding pre-welding equipment, comprising a support table, the four corners of the lower surface of the support table are provided with mounting feet, and a workpiece support is fixed in the middle of the upper surface of the support table, the upper surface of the workpiece support is provided with a groove for positioning the workpiece, and a workpiece fixing member for clamping and fixing the workpiece is provided on both the front and rear sides of the upper surface of the support table, the upper surface of the support table is provided with a welding pressing member, the welding pressing member is located on one side of the workpiece support, and the upper surface of the support table is provided with a welding pressing table driving member for driving the welding pressing member to slide, a resistance pre-welding member is provided on the upper surface of the support table, and the resistance pre-welding member is located above one end of the welding pressing member, a rotating bracket is provided on the support table, the rotating bracket is located on one side of the workpiece support, a plug-in positioning member is provided on the rotating bracket, and two workpiece clamping members for clamping the workpiece are provided on the plug-in positioning member, a workpiece conveying member is provided on one side of the upper surface of the support table, the distance between the workpiece conveying member and the center of the workpiece support and the rotating axis of the rotating bracket is the same, and a conveying driving member for driving the workpiece conveying member to slide back and forth is provided on the support table.

[0006] Furthermore, the workpiece fixing part includes a fixing plate fixed on the upper surface of the support platform, and the upper surface of the support platform is connected to a hydraulic telescopic column 2 through a hydraulic seat 2, and a clamping plate corresponding to the fixing plate is fixed to the telescopic end of the hydraulic telescopic column 2. The clamping plate can be driven to move by the extension and contraction of the hydraulic telescopic column 2, and the mounting ear plate welded on the automobile pipeline can be clamped and fixed by the clamping plate and the fixing plate, so that the workpiece can be fixed.

[0007] Furthermore, the welding pressing part includes two sliding rails fixed on the upper surface of the support platform, a sliding seat with a sliding connection is provided between the two sliding rails, the upper end of the sliding seat is connected to a conductive clamping platform through a pin shaft, one end of the conductive clamping platform is provided with a U-shaped groove corresponding to the workpiece branch pipe, and a pushing spring is provided between the lower surface of the conductive clamping platform and the upper surface of the sliding seat.

[0008] Furthermore, the welding press table driving component includes a hydraulic seat fixed on the upper surface of the support table, and the hydraulic seat is provided with a hydraulic telescopic column that drives the sliding seat to slide along a sliding track. The sliding seat can be driven to slide along the sliding track by the extension and retraction of the hydraulic telescopic column, and the conductive clamping table can be driven to move by the sliding of the sliding seat. The U-shaped groove on the conductive clamping table can be clamped to the lower end of the workpiece branch pipe.

[0009] Furthermore, the resistance pre-welded part includes an L-shaped bracket fixed on a support platform, a hydraulic telescopic column four is fixed on the L-shaped bracket, and the telescopic end of the hydraulic telescopic column four is connected to a discharge head through an insulating seat. The discharge head can be driven to move downward by extending the hydraulic telescopic column four, and contact the conductive clamping platform through the discharge head. Since the conductive clamping platform is connected to the sliding seat through a pin shaft, the conductive clamping platform can be rotated, and the conductive clamping platform conducts electricity to enable the workpiece branch pipe to be welded to the main pipe.

[0010] Furthermore, the rotating bracket includes a rotating disk rotatably connected to the support platform through a slewing support, and a flip motor is provided on the support platform to drive the rotating disk to flip, and an L-shaped bracket 2 is fixed to the upper surface of the rotating disk. The L-shaped bracket 2 can be flipped by rotating the flip motor, so that the plug-in positioning part can be rotated to directly above the workpiece support or the workpiece conveying part.

[0011] Furthermore, the plug-in positioning member includes a hydraulic telescopic column three fixed on the L-shaped bracket two, and the telescopic end of the hydraulic telescopic column three is connected to the plug-in positioning column through a square seat. The plug-in positioning column can be inserted into the through hole on the workpiece main pipe, thereby ensuring that a hole is punched on the workpiece main pipe.

[0012] Furthermore, the workpiece clamping member includes a rotating clamping plate connected to one side of the square seat through a pin shaft, and two pushing springs are provided between the upper end of the rotating clamping plate and the square seat, and an arc-shaped clamping head is provided at the lower end of the rotating clamping plate. The upper end of the workpiece branch pipe can be clamped by the arc-shaped clamping head, thereby fixing the workpiece on the outside of the plug-in positioning column.

[0013] Furthermore, the workpiece conveyor includes two sliding rails 2 fixed on the support table, a slidably connected support sliding table is provided between the two sliding rails 2, and positioning tubes for positioning the workpiece are evenly provided on the upper surface of the support sliding table, and the workpiece can be positioned through the positioning tubes.

[0014] Furthermore, the conveying drive member includes a rack arranged on the lower surface of the supporting sliding table, and a motor is fixed to the upper surface of the supporting table, and a gear meshing with the rack is provided at the end of the output shaft of the motor. The rotation of the motor can drive the gear to rotate, and the transmission of the gear and the rack can drive the supporting sliding table to slide along the sliding track 2, and the movement of the supporting sliding table can drive the workpiece branch pipe on the upper surface to move, so that different workpiece branches can be moved to the corresponding positions of the plug-in positioning parts, so as to transport the workpiece.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the automobile pipeline branch anti-miswelding pre-welding equipment has the following advantages:

[0016] 1. The present invention can drive the gear to rotate through the rotation of the motor, and can drive the supporting sliding table to slide along the sliding track 2 through the transmission of the gear and the rack, and can drive the workpiece branch pipe on the upper surface to move through the movement of the supporting sliding table, so that different workpiece branches can be moved to the positions corresponding to the plug-in positioning parts, so as to transport the workpieces, thereby saving a lot of manpower and avoiding the problem of manpower loading.

[0017] 2. The present invention can drive the sliding seat to slide along the sliding track through the extension and retraction of the hydraulic telescopic column, and can drive the conductive clamping platform to move through the sliding seat. The U-shaped groove on the conductive clamping platform can be clamped to the lower end of the workpiece branch pipe. The hydraulic telescopic column can be extended to drive the discharge head to move downward, and the discharge head can contact the conductive clamping platform. Since the conductive clamping platform is connected to the sliding seat through a pin shaft, the conductive clamping platform can be rotated, and the conductive clamping platform can conduct electricity to weld the workpiece branch pipe to the main pipe, so that the installation is more accurate.

[0018] 3. The present invention can insert the positioning column into the through hole on the workpiece main pipe through the plug-in, so as to ensure that the workpiece main pipe is punched with a hole to avoid the workpiece main pipe and the workpiece branch pipe being disconnected. The automobile pipeline branch anti-wrong welding pre-welding equipment has a simple structure and is easy to operate. It can not only save a lot of manpower, but also can automatically process the workpiece, and can effectively prevent the problem of the workpiece main pipe and the workpiece branch pipe being disconnected. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the top view structure of the present invention;

[0021] Figure 3 It is a left-side structural schematic diagram of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the welding pressing member of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the plug-in positioning member of the present invention.

[0024] In the figure: 1 mounting foot column, 2 supporting platform, 3 welding pressing platform driving part, 31 hydraulic seat, 32 hydraulic telescopic column 1, 4 welding pressing part, 41 conducting clamping platform, 42 jacking spring 1, 43 sliding seat, 44 sliding track 1, 5 workpiece fixing part, 51 hydraulic telescopic column 2, 52 hydraulic seat 2, 53 clamping plate, 54 fixing plate, 6 workpiece conveying part, 61 sliding track 2, 62 positioning tube, 63 supporting sliding platform, 7 conveying driving part, 71 gear, 72 rack, 73 motor, 8 rotating bracket, 81 rotating disk, 82 flip motor, 83 L-shaped bracket 2, 9 plug-in positioning part, 91 hydraulic telescopic column 3, 92 square seat, 93 plug-in positioning column, 10 resistor pre-welding part, 101 hydraulic telescopic column 4, 102 insulating seat, 103 discharge head, 104 L-shaped bracket, 11 workpiece support, 12 workpiece clamping member, 121 push spring 2, 122 rotating clamping plate, 123 arc clamping head. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-5The present invention provides a technical solution: a pre-welding device for preventing wrong welding of automobile pipeline branches, comprising a support platform 2, four corners of the lower surface of the support platform 2 are provided with mounting feet 1, and a workpiece support 11 is fixed in the middle of the upper surface of the support platform 2, the upper surface of the workpiece support 11 is provided with a groove for positioning the workpiece, and the upper surface of the support platform 2 is provided with a workpiece fixing member 5 for clamping and fixing the workpiece, the upper surface of the support platform 2 is provided with a welding pressing member 4, the welding pressing member 4 is located on one side of the workpiece support 11, and the upper surface of the support platform 2 is provided with a welding pressing platform for driving the welding pressing member 4 to slide A driving member 3, a resistance pre-welding member 10 is provided on the upper surface of the support table 2, and the resistance pre-welding member 10 is located above one end of the welding pressing member 4. A rotating bracket 8 is provided on the support table 2, and the rotating bracket 8 is located on one side of the workpiece support 11. A plug-in positioning member 9 is provided on the rotating bracket 8, and two workpiece clamping members 12 for clamping the workpiece are provided on the plug-in positioning member 9. A workpiece conveying member 6 is provided on one side of the upper surface of the support table 2, and the distance between the workpiece conveying member 6 and the center of the workpiece support 11 and the rotating axis of the rotating bracket 8 is the same. A conveying driving member 7 for driving the workpiece conveying member 6 to slide back and forth is provided on the support table 2.

[0027] The workpiece fixing part 5 includes a fixing plate 54 fixed on the upper surface of the support platform 2. The upper surface of the support platform 2 is connected to a hydraulic telescopic column 51 through a hydraulic seat 52. A clamping plate 53 corresponding to the fixing plate 54 is fixed to the telescopic end of the hydraulic telescopic column 51. The clamping plate 53 can be driven to move by the extension and retraction of the hydraulic telescopic column 51. The mounting ear plate welded on the automobile pipeline can be clamped and fixed by the clamping plate 53 and the fixing plate 54, so that the workpiece can be fixed.

[0028] The welding pressing part 4 includes two sliding rails 44 fixed on the upper surface of the support platform 2, a sliding seat 43 slidably connected is provided between the two sliding rails 44, the upper end of the sliding seat 43 is connected to a conductive clamping platform 41 through a pin shaft, one end of the conductive clamping platform 41 is provided with a U-shaped groove corresponding to the workpiece branch pipe, and a pushing spring 42 is provided between the lower surface of the conductive clamping platform 41 and the upper surface of the sliding seat 43.

[0029] The welding press drive 3 includes a hydraulic seat 31 fixed on the upper surface of the support platform 2. The hydraulic seat 31 is provided with a hydraulic telescopic column 32 that drives the sliding seat 43 to slide along a sliding track 44. The sliding seat 43 can be driven to slide along a sliding track 44 by the extension and retraction of the hydraulic telescopic column 32. The conductive clamping platform 41 can be driven to move by the sliding seat 43. The U-shaped groove on the conductive clamping platform 41 can be clamped to the lower end of the workpiece branch pipe.

[0030] The resistance pre-weld part 10 includes an L-shaped bracket 104 fixed on the support platform 2, and a hydraulic telescopic column 101 is fixed on the L-shaped bracket 104. The telescopic end of the hydraulic telescopic column 101 is connected to a discharge head 103 through an insulating seat 102. The discharge head 103 can be driven to move downward by extending the hydraulic telescopic column 101, and contact the conductive clamping platform 41 through the discharge head 103. Since the conductive clamping platform 41 is connected to the sliding seat 43 through a pin shaft, the conductive clamping platform 41 can be rotated. The conductive clamping platform 41 conducts electricity, so that the workpiece branch pipe and the main pipe can be welded.

[0031] The rotating bracket 8 includes a rotating disk 81 rotatably connected to the support platform 2 through a slewing support, and a flip motor 82 is provided on the support platform 2 to drive the rotating disk 81 to flip, and an L-shaped bracket 83 is fixed to the upper surface of the rotating disk 81. The L-shaped bracket 83 can be flipped by rotating the flip motor 82, so that the plug-in positioning member 9 can be rotated to directly above the workpiece support 11 or the workpiece conveying member 6.

[0032] The plug-in positioning member 9 includes a hydraulic telescopic column 3 91 fixed on the L-shaped bracket 2 83. The telescopic end of the hydraulic telescopic column 3 91 is connected to a plug-in positioning column 93 through a square seat 92. The plug-in positioning column 93 can be inserted into the through hole on the workpiece main pipe to ensure that a hole is punched on the workpiece main pipe.

[0033] The workpiece clamping member 12 includes a rotating clamping plate 122 connected to one side of the square seat 92 through a pin shaft, and a push spring 121 is provided between the upper end of the rotating clamping plate 122 and the square seat 92. An arc-shaped clamping head 123 is provided at the lower end of the rotating clamping plate 122. The upper end of the workpiece branch pipe can be clamped by the arc-shaped clamping head 123, thereby fixing the workpiece on the outside of the plug-in positioning column 93.

[0034] The workpiece conveyor 6 includes two sliding rails 61 fixed on the support platform 2, a slidably connected support sliding platform 63 is provided between the two sliding rails 61, and the upper surface of the support sliding platform 63 is evenly provided with positioning tubes 62 for positioning the workpiece, and the workpiece can be positioned through the positioning tubes 62.

[0035] The conveying drive member 7 includes a rack 72 arranged on the lower surface of the supporting sliding table 63, and a motor 73 is fixed to the upper surface of the supporting table 2. The end of the output shaft of the motor 73 is provided with a gear 71 meshing with the rack 72. The rotation of the motor 73 can drive the gear 71 to rotate, and the transmission of the gear 71 and the rack 72 can drive the supporting sliding table 63 to slide along the sliding track 61, and the movement of the supporting sliding table 63 can drive the workpiece branch pipe on the upper surface to move, so that different workpiece branch pipes can be moved to the corresponding position of the plug-in positioning member 9, so as to transport the workpiece. The automobile pipeline branch anti-miswelding pre-welding equipment has a simple structure and is easy to operate. It can not only save a lot of manpower, but also can automatically process the workpiece, and can effectively prevent the problem of the workpiece main pipe and the workpiece branch pipe not being connected.

[0036] During use: first place the workpiece main pipe on the upper surface of the workpiece support 11, and then the hydraulic telescopic column 51 can be extended and retracted to drive the clamping plate 53 to move, and the mounting ear plate welded on the automobile pipeline can be clamped and fixed by the clamping plate 53 and the fixing plate 54, so that the workpiece can be fixed. After fixation, the L-shaped bracket 83 can be turned over by the rotation of the flip motor 82, so that the plug-in positioning member 9 can be rotated to the top of the workpiece conveying member 6, and the workpiece can be positioned by the positioning tube 62, and the gear 71 can be driven to rotate by the rotation of the motor 73, and the support sliding table 63 can be driven to slide along the sliding track 61 through the transmission of the gear 71 and the rack 72, and the workpiece branch pipe on the upper surface can be driven to move by the movement of the support sliding table 63, so that different workpiece branches can be moved to the corresponding position of the plug-in positioning member 9, so as to transport the workpiece, and then the arc clamp The tightening head 123 can clamp the upper end of the workpiece branch pipe, thereby fixing the workpiece on the outside of the plug-in positioning column 93, and then move the workpiece branch pipe to the corresponding position of the workpiece main pipe, and insert it into the through hole on the workpiece main pipe through the plug-in positioning column 93, so as to ensure that a hole is punched on the workpiece main pipe, and then the hydraulic telescopic column 132 can be extended and retracted to drive the sliding seat 43 to slide along the sliding track 144, and the sliding of the sliding seat 43 can drive the conductive clamping platform 41 to move, and the U-shaped groove on the conductive clamping platform 41 can be clamped to the lower end of the workpiece branch pipe, and finally, the hydraulic telescopic column 101 can be extended to drive the discharge head 103 to move downward, and the discharge head 103 contacts the conductive clamping platform 41. Since the conductive clamping platform 41 is connected to the sliding seat 43 through a pin shaft, the conductive clamping platform 41 can be rotated, and the conductive clamping platform 41 conducts electricity, so that the workpiece branch pipe and the main pipe can be welded.

[0037] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A pre-welding device for preventing wrong welding of automobile pipeline branches, comprising a support table (2), characterized in that: The four corners of the lower surface of the support platform (2) are provided with mounting feet (1), and a workpiece support (11) is fixed in the middle of the upper surface of the support platform (2), the upper surface of the workpiece support (11) is provided with a groove for positioning the workpiece, and a workpiece fixing member (5) for clamping and fixing the workpiece is provided on both the front and rear sides of the upper surface of the support platform (2), the workpiece fixing member (5) comprises a fixing plate (54) fixed to the upper surface of the support platform (2), the upper surface of the support platform (2) is connected to a hydraulic telescopic column (51) through a hydraulic seat (52), and a clamping plate (53) corresponding to the fixing plate (54) is fixed to the telescopic end of the hydraulic telescopic column (51), and the upper surface of the support platform (2) is provided with a welding pressing member (4), and the welding pressing member (4) is positioned at the upper surface of the support platform (2). On one side of the workpiece support (11), the upper surface of the support platform (2) is provided with a welding pressure platform driving component (3) for driving the welding pressure component (4) to slide, the welding pressure component (4) comprising two sliding rails (44) fixed on the upper surface of the support platform (2), a sliding seat (43) slidably connected is provided between the two sliding rails (44), the upper end of the sliding seat (43) is connected to a conductive clamping platform (41) through a pin shaft, one end of the conductive clamping platform (41) is provided with a U-shaped groove corresponding to the workpiece branch pipe, a push spring (42) is provided between the lower surface of the conductive clamping platform (41) and the upper surface of the sliding seat (43), the welding pressure platform driving component (3) comprises a hydraulic seat (31) fixed on the upper surface of the support platform (2), the hydraulic seat (31) A hydraulic telescopic column (32) is provided on the pressure seat (31) for driving the sliding seat (43) to slide along a sliding track (44); a resistance pre-welding member (10) is provided on the upper surface of the support platform (2); the resistance pre-welding member (10) is located above one end of the welding pressing member (4); a rotating bracket (8) is provided on the support platform (2); the rotating bracket (8) is located on one side of the workpiece support (11); a plug-in positioning member (9) is provided on the rotating bracket (8); two workpiece clamping members (12) for clamping the workpiece are provided on the plug-in positioning member (9); a workpiece conveying member (6) is provided on one side of the upper surface of the support platform (2); the distance between the center of the workpiece conveying member (6) and the workpiece support (11) and the rotating axis of the rotating bracket (8) is the same; the support platform (2 ) is provided with a conveying driving member (7) for driving a workpiece conveying member (6) to slide forward and backward, the workpiece conveying member (6) comprises two sliding rails (61) fixed on the support platform (2), a supporting sliding platform (63) slidably connected is provided between the two sliding rails (61), and a positioning tube (62) for positioning the workpiece is evenly provided on the upper surface of the supporting sliding platform (63), the conveying driving member (7) comprises a rack (72) arranged on the lower surface of the supporting sliding platform (63), and a motor (73) is fixed on the upper surface of the support platform (2), and a gear (71) meshing with the rack (72) is provided at the end of the output shaft of the motor (73), and the resistance pre-welding member (10) comprises an L-shaped bracket (104) fixed on the support platform (2),A hydraulic telescopic column four (101) is fixed on the L-shaped bracket (104), and the telescopic end of the hydraulic telescopic column four (101) is connected to a discharge head (103) via an insulating seat (102). The rotating bracket (8) includes a rotating disk (81) rotatably connected to the support platform (2) via a slewing support, and the support platform (2) is provided with a flip motor (82) for driving the rotating disk (81) to flip, and an L-shaped bracket two (83) is fixed to the upper surface of the rotating disk (81). The plug-in positioning member (9) includes a hydraulic telescopic column three (91) fixed on the L-shaped bracket two (83), and the telescopic end of the hydraulic telescopic column three (91) is connected to a plug-in positioning column (93) via a square seat (92).

2. The automobile pipeline branch anti-error welding pre-welding equipment according to claim 1 is characterized in that: The workpiece clamping member (12) comprises a rotating clamping plate (122) connected to one side of a square seat (92) via a pin shaft, a second push spring (121) is provided between one side of an upper end of the rotating clamping plate (122) and the square seat (92), and an arc-shaped clamping head (123) is provided at the lower end of the rotating clamping plate (122).

Citation Information

Patent Citations

  • Glass pipe and metal pipe welding machine

    CN108031999A

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    CN116213933A