Tantalum steel composite plate welding alignment device of plasma arc welding machine

Abstract

The invention discloses a tantalum steel composite plate welding alignment device of a plasma arc welding machine, and relates to the field of plasma arc welding, the tantalum steel composite plate welding alignment device comprises a bottom plate, a synchronous displacement device, a clamping adjusting device I and a clamping adjusting device II; the device has the advantages that the structure is reasonable and simple, the production cost is low, installation is convenient, rough adjustment of the transverse distance between the composite plates is achieved through the synchronous displacement device, the welding requirements of the composite plates with different initial distances can be met, displacement consistency is guaranteed through synchronous driving, and the alignment efficiency is improved; the height adjustment and the overall angle adjustment of the composite plate are achieved through the lifting rotating device, it is guaranteed that the welding faces are located on the same horizontal plane and can adapt to different welding angles, meanwhile, small-angle fine adjustment of the clamping device is matched, the alignment precision is greatly improved, and the welding quality is guaranteed; by the adoption of the double fixing mode of the suction cups and the pressing device, the composite board can be stably clamped in the clamping and welding process, displacement caused by vibration or thermal deformation is avoided, and reliability and stability during welding are ensured.

Description

Technical Field

[0001] The invention relates to the field of plasma arc welding, and in particular to a tantalum-steel composite plate welding alignment device of a plasma arc welding machine. Background Art

[0002] In the field of plasma arc welding, tantalum-steel clad plates are widely used in high-end industries such as chemicals and metallurgy, due to their combination of tantalum's corrosion resistance and steel's high strength. However, the significant differences in physical properties between tantalum and steel (such as melting point and thermal expansion coefficient) require extremely high welding alignment precision. Errors in the lateral spacing, height difference, and angular deviation between the weld edges of the two clad plates can easily lead to welding defects (such as incomplete penetration, cracks, and porosity), seriously affecting weld quality and workpiece life.

[0003] At present, traditional tantalum-steel composite plate welding alignment mostly relies on manual operation or simple tooling: during manual alignment, the operator relies on visual observation and manual adjustment, which is not only inefficient but also difficult to ensure the high precision requirement of 0.1mm level. Especially in the welding of large-size composite plates, the labor intensity of manual operation is high and the error accumulation is obvious; although simple tooling can achieve preliminary positioning, it is mostly a fixed structure and cannot achieve synchronous adjustment of the lateral spacing. It also lacks flexible height adjustment and multi-angle rotation functions, making it difficult to adapt to the welding needs of composite plates of different specifications, and it is even more impossible to complete fine adjustment of small angles, resulting in insufficient alignment accuracy and restricting the stability of welding quality.

[0004] Furthermore, existing alignment devices often use a single clamping mechanism, which can easily cause the composite plate to shift during welding due to vibration or thermal deformation, further affecting alignment accuracy. Therefore, an alignment device that can achieve synchronous lateral displacement, multi-dimensional height and angle adjustment, and secure clamping with fine adjustment is urgently needed to meet the needs of high-quality welding of tantalum-steel composite plates. Summary of the Invention

[0005] The purpose of the present invention is to provide a tantalum-steel composite plate welding alignment device for a plasma arc welding machine in order to solve the above problems, which solves the problems of low manual operation accuracy, limited adjustment dimension of traditional tooling, insufficient clamping stability and difficulty in achieving high-precision synchronous alignment in the existing tantalum-steel composite plate welding alignment process.

[0006] In order to solve the above problems, the present invention provides a technical solution: a tantalum-steel composite plate welding alignment device for a plasma arc welding machine, comprising a base plate, a synchronous displacement device, a clamping adjustment device 1 and a clamping adjustment device 2; the synchronous displacement device is fixedly connected to the left side of the base plate, and the clamping adjustment device 1 is fixedly connected to the upper movable part of the synchronous displacement device; the clamping adjustment device 2 is fixedly connected to the right side of the base plate.

[0007] Preferably, the synchronous displacement device includes a mounting seat, a displacement mechanism 1, a synchronous drive mechanism and a displacement mechanism 2; the inner side of the mounting seat is fixedly connected to the outside of the left side of the base plate, and the displacement mechanism 1 is provided inside the front side of the mounting seat; the displacement mechanism 2 is provided inside the rear side of the mounting seat; the synchronous drive mechanism is provided inside the left side of the mounting seat, and the synchronous drive mechanism is connected to the left sides of the displacement mechanism 1 and the displacement mechanism 2.

[0008] Preferably, the structure of the second displacement mechanism is consistent with that of the first displacement mechanism, and the first displacement mechanism includes a guide groove, a screw rod and a slider; the guide groove is horizontally opened on the front side of the mounting seat, the center of the guide groove is movably connected with the screw rod, and the left side of the screw rod is connected to the synchronous drive mechanism; the outside of the slider is horizontally movably connected to the inside of the guide groove, and the threaded hole set in the center of the slider is connected to the screw rod.

[0009] Preferably, the synchronous drive mechanism includes a driven pulley, a transmission chamber, a synchronous belt, a motor 1 and a driving pulley; the transmission chamber is arranged inside the left side of the mounting seat; the motor 1 is fixedly connected to the inside of the left center of the mounting seat, and the driving pulley is fixedly connected to the right output shaft of the motor 1, and the motor 1 is a servo motor or a stepper motor; the driven pulley is fixedly connected to the left outside of the displacement mechanism 1, and the driven pulley is connected to the driving pulley through a synchronous belt.

[0010] Preferably, the structure of the clamping and adjusting device 2 is consistent with that of the clamping and adjusting device 1, and the clamping and adjusting device 1 includes a lifting and rotating device 1, a clamping device and a lifting and rotating device 2; the bottoms of the lifting and rotating device 1 and the lifting and rotating device 2 are respectively fixedly connected to the front and rear moving parts of the synchronous displacement device, and a clamping device is fixedly connected between the rotating parts of the lifting and rotating device 1 and the lifting and rotating device 2.

[0011] Preferably, the structure of the lifting and rotating device 2 is consistent with that of the lifting and rotating device 1, and the lifting and rotating device 1 includes a column, a vertical slide, a movable seat, a rotating seat, a transmission shaft, a screw 2, a motor 2 and a motor 3; a vertical slide is provided inside the column, and the right side of the top of the column is fixedly connected to the motor 2; the screw 2 is movably connected to the right side of the vertical slide, and the upper center of the screw 2 is fixedly connected to the output shaft of the motor 2; the outside of the movable seat is vertically movably connected to the inside of the vertical slide, and the threaded hole provided on the right side of the movable seat is connected to the screw 2, the central inside of the movable seat is movably connected with the transmission shaft, and the rear outside of the movable seat is fixedly connected to the motor 3; the rear center of the transmission shaft is fixedly connected to the output shaft of the motor 3, and the front end of the transmission shaft is fixedly connected to the rotating seat; the motor 2 and the motor 3 are both servo motors or stepper motors.

[0012] Preferably, the clamping device includes a connecting seat, an arc guide groove, a rotating plate, a suction cup, a motor four and a clamping device; the front and rear centers of the connecting seat are fixedly connected to the rotating parts of the lifting and rotating device one and the lifting and rotating device two respectively, and arc guide grooves are opened on the front and rear positions of the connecting seat; the front and rear outer sides of the rotating plate are movably connected to the corresponding arc guide grooves respectively, and several suction cups are provided on the upper side of the rotating plate; there are two clamping devices, and the two clamping devices are fixedly connected to the upper centers of the corresponding arc guide grooves respectively; the motor four is fixedly connected to the center of the bottom surface of the connecting seat, and the upper output shaft of the motor four is fixedly connected to the lower center of the rotating plate.

[0013] Preferably, the pressing device is a cylinder.

[0014] The beneficial effects of the present invention are as follows: (1) The present invention has a reasonable and simple structure, low production cost, and easy installation. The coarse adjustment of the lateral spacing of the composite plates is achieved through the synchronous displacement device, which can adapt to the welding requirements of composite plates with different initial spacings. The synchronous drive ensures the consistency of the displacement and improves the alignment efficiency.

[0015] (2) The present invention realizes the adjustment of the height and overall angle of the composite plate through the lifting and rotating device, ensuring that the welding surface is on the same horizontal plane and can adapt to different welding angles. At the same time, the small angle fine adjustment of the clamping device is combined with the positioning accuracy to greatly improve the welding quality.

[0016] (3) The present invention adopts a dual fixing method of a suction cup and a clamping device, which can firmly clamp the composite plate during the clamping and welding process, avoid displacement caused by vibration or thermal deformation, and ensure reliability and stability during welding.

[0017] (4) The present invention realizes the adjustment of various dimensions through motors and specific transmission structures, which is convenient to operate, reduces manual intervention, and reduces labor intensity. At the same time, it is adapted to external visual inspection, further improving the degree of automation and accuracy of alignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 Schematic diagram of the structure of the synchronous displacement device.

[0020] Figure 3 Schematic diagram of the displacement mechanism.

[0021] Figure 4 It is a structural diagram of the synchronous drive mechanism.

[0022] Figure 5 It is a structural diagram of the clamping and adjusting device.

[0023] Figure 6 It is a structural diagram of the lifting and rotating device.

[0024] Figure 7 for Figure 6 side view.

[0025] Figure 8 Schematic diagram of the structure of the clamping device.

[0026] 1-base plate; 2-synchronous displacement device; 3-clamping and adjusting device 1; 4-clamping and adjusting device 2; 21-mounting seat; 22-displacement mechanism 1; 23-synchronous drive mechanism; 24-displacement mechanism 2; 221-guide groove; 222-screw rod 1; 223-slider; 231-driven pulley; 232-transmission chamber; 233-synchronous belt; 234-motor 1; 235-driving pulley; 31-lifting and rotating device 1; 32-clamping device; 33-lifting and rotating device 2; 311-column; 312-vertical slide groove; 313-movable seat; 314-rotating seat; 315-drive shaft; 316-screw rod 2; 317-motor 2; 318-motor 3; 321-connecting seat; 322-arc guide groove; 323-rotating plate; 324-suction cup; 325-motor 4; 326-pressing device. DETAILED DESCRIPTION

[0027] like Figure 1 As shown, this specific embodiment adopts the following technical solution: a tantalum-steel composite plate welding alignment device for a plasma arc welding machine, comprising a base plate 1, a synchronous displacement device 2, a clamping adjustment device 3 and a clamping adjustment device 2 4; the synchronous displacement device 2 is fixedly connected to the left side of the base plate 1, and the clamping adjustment device 3 is fixedly connected to the upper movable part of the synchronous displacement device 2; the clamping adjustment device 2 4 is fixedly connected to the right side of the base plate 1.

[0028] like Figure 2 As shown, the synchronous displacement device 2 includes a mounting seat 21, a displacement mechanism 1 22, a synchronous drive mechanism 23 and a displacement mechanism 2 24; the inner side of the mounting seat 21 is fixedly connected to the outside of the left side of the base plate 1, and the displacement mechanism 1 22 is provided inside the front side of the mounting seat 21; the displacement mechanism 24 is provided inside the rear side of the mounting seat 21; the synchronous drive mechanism 23 is provided inside the left side of the mounting seat 21, and the synchronous drive mechanism 23 is connected to the left sides of the displacement mechanism 1 22 and the displacement mechanism 2 24.

[0029] like Figure 3As shown, the structure of the displacement mechanism 24 is consistent with that of the displacement mechanism 1 22. The displacement mechanism 1 22 includes a guide groove 221, a screw rod 222 and a slider 223. The guide groove 221 is horizontally opened on the front side of the mounting seat 21. The center of the guide groove 221 is movably connected to the screw rod 222, and the left side of the screw rod 222 is connected to the synchronous drive mechanism 23. The outside of the slider 223 is horizontally movably connected to the inside of the guide groove 221, and the threaded hole set in the center of the slider 223 is connected to the screw rod 222.

[0030] like Figure 4 As shown, the synchronous drive mechanism 23 includes a driven pulley 231, a transmission chamber 232, a synchronous belt 233, a motor 234 and a driving pulley 235; the transmission chamber 232 is arranged inside the left side of the mounting seat 21; the motor 234 is fixedly connected to the central inside of the left side of the mounting seat 21, and the driving pulley 235 is fixedly connected to the right output shaft of the motor 234, and the motor 234 is a servo motor or a stepping motor; the driven pulley 231 is fixedly connected to the outside of the left side of the displacement mechanism 22, and the driven pulley 231 is connected to the driving pulley 235 through the synchronous belt 233.

[0031] like Figure 5 As shown, the structure of the clamping adjustment device 2 4 is consistent with that of the clamping adjustment device 1 3, and the clamping adjustment device 1 3 includes a lifting and rotating device 1 31, a clamping device 32 and a lifting and rotating device 2 33; the bottoms of the lifting and rotating device 1 31 and the lifting and rotating device 2 33 are respectively fixedly connected to the front and rear moving parts of the synchronous displacement device 2, and the clamping device 32 is fixedly connected between the rotating parts of the lifting and rotating device 1 31 and the lifting and rotating device 2 33.

[0032] like Figure 6 and Figure 7As shown, the structure of the lifting and rotating device 2 33 is consistent with that of the lifting and rotating device 1 31. The lifting and rotating device 1 31 includes a column 311, a vertical slide 312, a movable seat 313, a rotating seat 314, a transmission shaft 315, a screw 2 316, a motor 2 317 and a motor 318; a vertical slide 312 is provided inside the column 311, and a motor 2 317 is fixedly connected to the right side of the top of the column 311; the screw 2 316 is movably connected to the right side of the vertical slide 312, and the upper center of the screw 2 316 is connected to the output shaft of the motor 2 317 Fixed connection; the outside of the movable seat 313 is vertically movably connected to the inside of the vertical slide groove 312, the threaded hole set on the right side of the movable seat 313 is connected to the screw 2 316, the central internal movably connected to the movable seat 313 is connected to the transmission shaft 315, and the rear side of the movable seat 313 is fixedly connected to the outside of the motor 318; the rear center of the transmission shaft 315 is fixedly connected to the output shaft of the motor 318, and the front end of the transmission shaft 315 is fixedly connected to the rotating seat 314; the motor 2 317 and the motor 3 318 are both servo motors or stepper motors.

[0033] like Figure 8 As shown, the clamping device 32 includes a connecting seat 321, an arc guide groove 322, a rotating plate 323, a suction cup 324, a motor four 325 and a clamping device 326; the front and rear centers of the connecting seat 321 are fixedly connected to the rotating parts of the lifting and rotating device 1 31 and the lifting and rotating device 2 33 respectively, and arc guide grooves 322 are opened on the front and rear positions of the connecting seat 321; the front and rear outer sides of the rotating plate 323 are movably connected to the corresponding arc guide groove 322 respectively, and several suction cups 324 are provided on the upper side of the rotating plate 323; there are two clamping devices 326, and the two clamping devices 326 are fixedly connected to the upper center of the corresponding arc guide groove 322; the motor four 325 is fixedly connected to the center of the bottom surface of the connecting seat 321, and the upper output shaft of the motor four 325 is fixedly connected to the lower center of the rotating plate 323.

[0034] Wherein, the pressing device 326 is a cylinder.

[0035] The usage status of the present invention is as follows: the present invention has a reasonable and simple structure, low production cost, and easy installation. When the plasma arc welding machine is used to weld the tantalum-steel composite plate, the operator first places the two tantalum-steel composite plates to be welded on the clamping device 32 of the clamping adjustment device 1 3 and the clamping adjustment device 2 4 respectively. The suction cup 324 in the clamping device 32 is started to fix the bottom of the composite plate by negative pressure adsorption. At this time, the lifting and rotating device 1 31 and the lifting and rotating device 2 33 of the clamping adjustment device 1 3 are at the initial height, the clamping device 32 remains horizontal, the clamping adjustment device 2 4 is fixed to the right side of the bottom plate 1, and the clamped composite plate is the reference position. According to the initial position of the two composite plates The motor 1 234 (servo motor or stepper motor) of the synchronous displacement device 2 is started. The motor 1 234 drives the active pulley 235 to rotate in the transmission cavity 232. The active pulley 235 drives the driven pulley 231 to rotate synchronously through the synchronous belt 233. The driven pulley 235 drives the screw 1 222 of the displacement mechanism 1 22 to rotate, so that the slider 223 moves laterally along the screw 1 222 in the guide groove 221. At the same time, the displacement mechanism 2 24 moves synchronously, and its slider drives the lifting and rotating device 1 31 and the bottom of the lifting and rotating device 2 33 of the clamping and adjusting device 3 to move, thereby driving the clamped composite plate to move closer to or away from the clamping and adjusting device 2 4, thereby achieving The horizontal spacing is roughly adjusted. When the composite plate approaches the reference position, the lifting and rotating device 1 31 and the lifting and rotating device 2 33 of the clamping and adjusting device 3 are started. The motor 2 317 drives the screw 2 316 to rotate in the vertical slide 312, so that the movable seat 313 moves up and down along the vertical slide 312, and the rotating seat 314 is driven to move up and down by the transmission shaft 315 to adjust the height of the composite plate to ensure that the welding surface is in the same horizontal plane. In addition, the motor 318 drives the transmission shaft 315 to rotate, so that the rotating seat 314 drives the clamping device 32 to rotate as a whole to adjust the different welding angles of the composite plate. At the same time, the clamping and adjusting device 2 4 is fine-tuned synchronously to ensure the relative position accuracy. If the edge of the composite plate If there is an angular deviation, the motor 325 of the clamping device 32 is started to drive the rotating plate 323 to rotate along the arc guide groove 322. The suction cup 324 and the clamping device 326 move synchronously with it to achieve fine adjustment of small-angle rotation. The welding edges are confirmed to be completely aligned through external visual inspection or manual observation. After the alignment is completed, the clamping device 326 (cylinder) on the upper side of the arc guide groove 322 is extended, so that the edge of the rotating plate 323 can be pressed by the end of the piston rod, thereby ensuring the reliability and stability of welding. During welding, the suction cup 324 and the clamping device 326 remain in a clamped state, and the plasma arc welding machine welding gun is aligned with the aligned welding edge to perform welding operations.

[0036] The control method of the present invention is through manual startup or control through existing automation technology. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices. Therefore, the present invention will no longer explain the control method and wiring layout in detail.

[0037] In the description of the invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0038] In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", "fixation", and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two elements or an interaction relationship between two elements. Unless otherwise clearly specified, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0039] The above shows and describes the basic principles, main features and advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the invention. Without departing from the spirit and scope of the invention, the invention may be subject to various changes and improvements, which shall fall within the scope of the invention to be protected. The scope of protection of the invention shall be defined by the accompanying claims and their equivalents.

Claims

1. A tantalum-steel composite plate welding alignment device for a plasma arc welding machine, characterized by: It comprises a base plate (1), a synchronous displacement device (2), a clamping and adjusting device 1 (3) and a clamping and adjusting device 2 (4); The left side of the base plate (1) is fixedly connected to a synchronous displacement device (2), and the upper movable part of the synchronous displacement device (2) is fixedly connected to a clamping adjustment device (3); The second clamping and adjusting device (4) is fixedly connected to the right side of the base plate (1).

2. The tantalum-steel composite plate welding alignment device for a plasma arc welding machine according to claim 1, characterized in that: The synchronous displacement device (2) comprises a mounting seat (21), a first displacement mechanism (22), a synchronous driving mechanism (23) and a second displacement mechanism (24); The inner side of the mounting seat (21) is fixedly connected to the outer left side of the base plate (1), and a displacement mechanism (22) is provided inside the front side of the mounting seat (21); The second displacement mechanism (24) is arranged inside the rear side of the mounting seat (21); The synchronous drive mechanism (23) is arranged inside the left side of the mounting seat (21), and the synchronous drive mechanism (23) is connected to the left sides of the first displacement mechanism (22) and the second displacement mechanism (24).

3. The tantalum-steel composite plate welding alignment device for a plasma arc welding machine according to claim 2, characterized in that: The second displacement mechanism (24) has the same structure as the first displacement mechanism (22), and the first displacement mechanism (22) includes a guide groove (221), a screw rod (222) and a slider (223); The guide groove (221) is transversely opened on the front side of the mounting seat (21), the center of the guide groove (221) is movably connected to a screw rod (222), and the left side of the screw rod (222) is connected to the synchronous drive mechanism (23); The outside of the slider (223) is laterally movably connected to the inside of the guide groove (221), and the threaded hole provided in the center of the slider (223) is connected to the screw rod 1 (222).

4. The tantalum-steel composite plate welding alignment device for a plasma arc welding machine according to claim 2, characterized in that: The synchronous drive mechanism (23) includes a driven pulley (231), a transmission cavity (232), a synchronous belt (233), a motor (234) and a driving pulley (235); The transmission cavity (232) is arranged inside the left side of the mounting seat (21); The motor 1 (234) is fixedly connected to the center of the left side of the mounting seat (21), and a driving pulley (235) is fixedly connected to the output shaft on the right side of the motor 1 (234). The motor 1 (234) is a servo motor or a stepping motor; The driven pulley (231) is fixedly connected to the outside of the left side of the displacement mechanism 1 (22), and the driven pulley (231) is connected to the driving pulley (235) via a synchronous belt (233).

5. The tantalum-steel composite plate welding alignment device for a plasma arc welding machine according to claim 1, characterized in that: The structure of the clamping and adjusting device 2 (4) is consistent with that of the clamping and adjusting device 1 (3), and the clamping and adjusting device 1 (3) includes a lifting and rotating device 1 (31), a clamping device (32) and a lifting and rotating device 2 (33); The bottoms of the lifting and rotating device 1 (31) and the lifting and rotating device 2 (33) are respectively fixedly connected to the front and rear moving parts of the synchronous displacement device (2), and a clamping device (32) is fixedly connected between the rotating parts of the lifting and rotating device 1 (31) and the lifting and rotating device 2 (33).

6. The tantalum-steel composite plate welding alignment device for a plasma arc welding machine according to claim 5, characterized in that: The lifting and rotating device 2 (33) has the same structure as the lifting and rotating device 1 (31), and the lifting and rotating device 1 (31) includes a column (311), a vertical slide (312), a movable seat (313), a rotating seat (314), a transmission shaft (315), a screw rod 2 (316), a motor 2 (317) and a motor 3 (318); A vertical slide groove (312) is provided inside the column (311), and a second motor (317) is fixedly connected to the right side of the top of the column (311); The second screw rod (316) is movably connected to the right side of the vertical slide groove (312), and the upper center of the second screw rod (316) is fixedly connected to the output shaft of the second motor (317); The outside of the movable seat (313) is vertically movably connected to the inside of the vertical slide groove (312); the threaded hole provided on the right side of the movable seat (313) is connected to the second screw (316); the central interior of the movable seat (313) is movably connected to the transmission shaft (315); the rear exterior of the movable seat (313) is fixedly connected to the third motor (318); The rear center of the transmission shaft (315) is fixedly connected to the output shaft of the third motor (318), and the front end of the transmission shaft (315) is fixedly connected to the rotating seat (314); The motor 2 (317) and the motor 3 (318) are both servo motors or stepper motors.

7. The tantalum-steel composite plate welding alignment device for a plasma arc welding machine according to claim 5, characterized in that: The clamping device (32) includes a connecting seat (321), an arc guide groove (322), a rotating plate (323), a suction cup (324), a fourth motor (325) and a pressing device (326); The front and rear centers of the connecting seat (321) are fixedly connected to the rotating parts of the lifting and rotating device 1 (31) and the lifting and rotating device 2 (33), respectively. The front and rear positions of the connecting seat (321) are both provided with arc guide grooves (322); The front and rear exteriors of the rotating plate (323) are movably connected to the interiors of the corresponding arc guide grooves (322), and a plurality of suction cups (324) are provided on the upper side of the rotating plate (323); There are two pressing devices (326), and the two pressing devices (326) are respectively fixedly connected to the center of the upper side of the corresponding circular arc guide groove (322); The motor four (325) is fixedly connected to the center of the bottom surface of the connecting seat (321), and the output shaft on the upper side of the motor four (325) is fixedly connected to the center of the lower side of the rotating plate (323).

8. The tantalum-steel composite plate welding alignment device for a plasma arc welding machine according to claim 7, characterized in that: The pressing device (326) is a cylinder.

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