Plasma automatic flat plate tailor-welding equipment and method for electrolytic cell

Abstract

The invention discloses plasma automatic flat plate tailor-welding equipment and method for an electrolytic bath, and relates to the technical field of plasma automatic flat plate tailor-welding of the electrolytic bath. The invention discloses plasma automatic flat plate tailor-welding equipment and method for an electrolytic bath. The plasma automatic flat plate tailor-welding equipment comprises a supporting plate, an adjusting assembly is fixedly connected to the supporting plate, and a centering assembly is fixedly connected to the supporting plate; due to the position relation between the connecting frame and the clamping plates, the two sets of clamping plates can get close to each other, the two ends of a tailor-welded blank on a pressing block are fixed, the effect of automatically centering and stabilizing the position of the tailor-welded blank is achieved, a pry bar at one end of a heating head can pry up the heating head at the top of a heating bin, combustible gas is released from the heating head, and the heating bin is heated. And at the moment, the heating head can heat the supporting plate on the top and heat the tailor-welded blank on the pressing block, and the effects that preheating is conducted firstly when the tailor-welded blank is machined, and cold cracks caused by direct machining are avoided are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of plasma automatic flat plate welding of electrolytic cells, and in particular, relates to a plasma automatic flat plate welding device and method for electrolytic cells. Background Art

[0002] As a key industrial equipment, electrolyzers play a vital role in many fields: in the field of new energy, such as water electrolysis to produce hydrogen, electrolyzers are also one of the core equipment; in the metal smelting industry, such as the production of aluminum, copper and other metals, electrolyzers separate metal ions from compounds through the electrolysis process to achieve metal purification and preparation; in the chemical industry, electrolyzers can be used to produce important chemical products such as chlorine and sodium hydroxide.

[0003] Traditional clamping methods usually use simple mechanical clamps, which make it difficult to achieve precise positioning of the flat plate. During the welding process, the position of the flat plate may be slightly offset, resulting in inaccurate position of the weld and affecting the welding quality. Especially for the flat plate splicing of large electrolytic cells, due to the large size and heavy weight of the flat plate, it is difficult for traditional clamps to ensure the position accuracy of the flat plate. In actual production, different clamps need to be replaced according to different welding tasks, which increases production preparation time and cost. Moreover, when the size or shape of the flat plate changes, it is difficult for traditional clamps to quickly adjust to the appropriate position, affecting production efficiency. For some high-strength, high-alloy steel and other materials, cold cracks are prone to occur during the welding process. The formation of cold cracks is mainly due to the diffusion and aggregation of hydrogen during the welding process, as well as the hardened structure of the welding area. In view of this, the present invention is specially proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide a plasma automatic flat plate welding device and method for an electrolytic cell that can overcome the above problems or at least partially solve the above problems.

[0005] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a plasma automatic flat plate welding device and method for an electrolytic cell, comprising a support plate, an adjustment component fixedly connected to the support plate, a centering component fixedly connected to the support plate, two groups of connecting plates slidably connected to the top of the support plate, a clamping component fixedly connected to the connecting plate, two groups of preheating and post-heating components fixedly connected to the periphery of the centering component, and two groups of preheating and post-heating components and the support plate fixedly connected to the periphery of the centering component; wherein the adjustment component comprises: an adjustment groove, which is opened inside the support plate, and the adjustment groove is provided with a horizontal groove in the direction close to the centering component; an adjustment block, which corresponds to the adjustment groove, and the height of the adjustment block is not on the same horizontal line as the height of the horizontal groove provided on the adjustment groove; a centering slide groove, which is opened at one end close to the centering component, and the centering slide groove has the same height as the horizontal groove provided on the adjustment groove, and a connecting plate is slidably connected to the centering slide groove.

[0006] Furthermore, the centering assembly includes a centering seat, the periphery of the centering seat is fixedly connected to the support plate, the interior of the centering seat is provided with two groups of connecting grooves, the internal threaded connection of the centering seat is provided with a pressing block, the periphery of the centering seat is fixedly connected to an outer slide plate, the outer slide plate is rotatably connected to a stretching bracket, an air compression chamber is provided inside the centering seat, the air compression chamber corresponds to the two groups of connecting grooves on the centering seat, the inner wall of the centering seat and the outer wall of the pressing block are provided with meshing threads, so that the pressing block can rotate counterclockwise upward on the centering seat and clockwise downward, the pressing block is in a "T" shape, and the top of the thread set on the pressing block is slidably connected to the top of the thread set on the centering seat.

[0007] Furthermore, the clamping assembly includes a limiting plate, the bottom of the limiting plate is fixedly connected to the connecting plate, a transverse tooth plate is fixedly connected to the limiting plate, a tooth plate is provided at one end of the transverse tooth plate away from the limiting plate and meshes with two sets of two-way gears, the end of the two-way gear away from the transverse tooth plate is rotatably connected to the clamping plate, the transverse tooth plate is slidably connected to a connecting frame, the end of the clamping plate away from the two-way gear is rotatably connected to the connecting frame, the two sets of two-way gears are rotatably connected inside the connecting frame, and the bottom of the limiting plate has the same height as the horizontal groove provided on the adjusting slot.

[0008] Furthermore, the preheating post-heating component includes a heating plate, which is fixedly installed on the periphery of the centering seat, an air pressure groove is opened inside the heating plate, the air pressure groove corresponds to the connecting groove, a tension spring is fixedly installed inside the heating plate, a piston block is fixedly installed on the top of the tension spring, a heating groove is opened on the heating plate, a heating chamber is fixedly connected to the top of the piston block, a heating head is fixedly connected to the inside of the heating chamber, a pry bar is slidably connected to the top periphery of the heating head, a pry electric component is arranged on the end of the pry bar away from the heating head, an electronic release component is fixedly connected to the bottom of the piezoelectric component, and an end of the electronic release component away from the piezoelectric component is close to the heating head.

[0009] Furthermore, the shape of the heating tank is in the shape of the Chinese character 'tu' (土), with a smaller diameter at the end near the top of the heating plate and a larger diameter at the end near the top of the tension spring.

[0010] A plasma automatic flat plate welding method for an electrolytic cell, applied to the plasma automatic flat plate welding equipment for an electrolytic cell as described above. The automatic flat plate welding method includes the following steps: S1: Automatic centering: Place the adjusting block in the adjusting groove on the support plate according to the length of the welding plate, and then place the required welding plate on the top of the pressing block on the centering assembly. The bottom of the pressing block meshes with the internal thread of the centering seat and moves downward. The upper half of the centering seat and the upper half of the pressing block slide relative to each other. At the same time, the top of the pressing block drives the outer sliding plate on the periphery to rotate clockwise, driving the two stretching brackets to rotate clockwise synchronously. One end of the connecting plate close to the stretching bracket rotates on the connecting plate, and at the same time, the stretching connecting plate approaches one end of the centering seat on the centering chute. When the two stretching brackets approach each other, the welding plate on the centering seat is automatically moved closer to the support plate. Then, since the adjusting block is placed according to the length of the welding plate before use, when the connecting plate slides on the centering chute, the limiting plate at the other end of the connecting plate moves synchronously towards the connecting plate. The bottom of the limiting plate will contact the adjusting block, and at this time, the limiting plate stops moving. The limiting plate pulls the transverse toothed plate, and the gears on the transverse toothed plate drive the two double gears to rotate towards each other. Due to the positional relationship between the connecting frame and the clamping plate, the two clamping plates will approach each other to fix both ends of the welding plate on the pressing block.

[0011] S2: Preheating: When the pressing block moves downward inside the centering seat, the bottom of the pressing block squeezes the air pressure chamber. The air inside the air pressure chamber is squeezed and reaches the inside of the air pressure groove through the connecting groove. The piston block inside the air pressure groove slides upward on the heating tank. At the same time, the tension spring at the bottom of the piston block will restore the piston block after the welding plate is completed. The lever at the top of the piston block will be squeezed by the heating tank during the continuous upward movement of the piston block. At this time, the lever moves downward to squeeze the piezoelectric component to release electrons at the electron release part, and the lever near one end of the heating head will pry open the heating head at the top of the heating chamber, releasing combustible gas from the heating head. At this time, the heating head will heat the support plate at the top and also heat the welding plate on the pressing block.

[0012] S3: Post-heating: During the process of welding the plate, the welding plate is always on the top of the pressing block, and the lever will always be squeezed by the heating tank. When there is enough combustible gas inside the heating chamber, the heating head will continuously heat the welding plate.

[0013] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: due to the positional relationship between the connecting frame and the clamping plate, the two sets of clamping plates will be close to each other, and the two ends of the welded plate on the pressing block will be fixed, thereby achieving the effect of automatically centering and stabilizing the position of the welded plate.

[0014] The pry bar at one end of the heating head will pry open the heating head on the top of the heating chamber, releasing combustible gas from the heating head. At this time, the heating head will heat the top support plate and also heat the welded plate on the pressing block, thereby preheating the welded plate before processing to avoid cold cracks caused by direct processing.

[0015] When there is enough combustible gas inside the heating chamber, the heating head will continue to heat the welded plates, so that the welded plates maintain a continuous high temperature during the welding process, avoiding uneven heating that will affect the quality and performance of the welded joints.

[0016] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the attached picture: Figure 1 It is a front view schematic diagram of a plasma automatic flat plate welding device and method for an electrolytic cell proposed by the present invention; Figure 2 A schematic side view of a plasma automatic flat plate welding device and method for an electrolytic cell proposed by the present invention; Figure 3 This is a structural schematic diagram of a connecting tank, an air compression chamber and an air compression tank in a plasma automatic flat plate welding device and method for an electrolytic cell proposed by the present invention; Figure 4 This is a schematic structural diagram of a connecting plate and a limiting plate in a plasma automatic flat plate welding device and method for an electrolytic cell proposed by the present invention; Figure 5 This is a schematic structural diagram of a hollow pressing tank and a heating tank in a plasma automatic flat plate welding device and method for an electrolytic cell proposed by the present invention; Figure 6 This is a schematic structural diagram of a tension spring and a piston block in a plasma automatic flat plate welding device and method for an electrolytic cell proposed by the present invention; Figure 7 This is a schematic structural diagram of a heating tank and a heating chamber in a plasma automatic flat plate welding device and method for an electrolytic cell proposed by the present invention; Figure 8 This is a schematic structural diagram of a heating plate in a plasma automatic flat plate welding device and method for an electrolytic cell proposed by the present invention; Fig. 9 The present invention provides a schematic structural diagram of a piston block and a heating head in a plasma automatic flat plate welding device and method for an electrolytic cell.

[0018] In the figure: 1. Support plate; 2. Adjustment assembly; 21. Adjustment groove; 22. Adjustment block; 23. Centering slide groove; 3. Centering assembly; 31. Centering seat; 32. Connecting groove; 33. Pressing block; 34. Outer slide plate; 35. Stretching bracket; 36. Air compression chamber; 4. Connecting plate; 5. Clamping assembly; 51. Limiting plate; 52. Horizontal tooth plate; 53. Bidirectional gear; 54. Clamping plate; 55. Connecting frame; 6. Preheating and post-heating assembly; 61. Heating plate; 62. Air compression groove; 63. Stretching spring; 64. Piston block; 65. Heating groove; 66. Heating chamber; 67. Heating head; 68. Pry bar; 69. Piezoelectric element; 610. Electronic release element. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0020] Example 1: Reference Figure 1-Figure 9 , a plasma automatic flat plate welding device and method for an electrolytic cell, comprising a support plate 1, an adjusting component 2 is fixedly connected to the support plate 1, a centering component 3 is fixedly connected to the support plate 1, two groups of connecting plates 4 are slidably connected to the top of the support plate 1, a clamping component 5 is fixedly connected to the connecting plate 4, two groups of preheating and post-heating components 6 are fixedly connected to the periphery of the centering component 3, and two groups of preheating and post-heating components 6 and the support plate 1 are fixedly connected to the periphery of the centering component 3; wherein the adjusting component 2 comprises: an adjusting groove 21, which is opened inside the support plate 1, and the adjusting groove 21 is provided with a horizontal groove in the direction close to the centering component 3; an adjusting block 22, which corresponds to the adjusting groove 21, and the height of the adjusting block 22 is not on the same horizontal line as the height of the horizontal groove provided on the adjusting groove 21; a centering slide groove 23, which is opened at one end close to the centering component 3, and the centering slide groove 23 has the same height as the horizontal groove provided on the adjusting groove 21, and a connecting plate 4 is slidably connected to the centering slide groove 23.

[0021] The centering assembly 3 includes a centering seat 31, the periphery of the centering seat 31 is fixedly connected to the support plate 1, two groups of connecting grooves 32 are provided inside the centering seat 31, a pressing block 33 is connected to the internal thread of the centering seat 31, an outer slide plate 34 is fixedly connected to the periphery of the centering seat 31, a stretching bracket 35 is rotatably connected to the outer slide plate 34, an air compression chamber 36 is provided inside the centering seat 31, the air compression chamber 36 corresponds to the two groups of connecting grooves 32 on the centering seat 31, the inner wall of the centering seat 31 and the outer wall of the pressing block 33 are provided with meshing threads, so that the pressing block 33 can rotate counterclockwise upward and clockwise downward on the centering seat 31, the pressing block 33 is in the shape of a "T", and the top of the thread provided on the pressing block 33 is slidably connected to the top of the thread provided on the centering seat 31.

[0022] The clamping assembly 5 includes a limiting plate 51, the bottom of which is fixedly connected to the connecting plate 4, a transverse tooth plate 52 is fixedly connected to the limiting plate 51, a tooth plate is provided at one end of the transverse tooth plate 52 away from the limiting plate 51 and meshes with two sets of two-way gears 53, an end of the two-way gear 53 away from the limiting plate 51 is rotatably connected to a clamping plate 54, a connecting frame 55 is slidably connected to the transverse tooth plate 52, an end of the clamping plate 54 away from the two-way gear 53 is rotatably connected to the connecting frame 55, the two sets of two-way gears 53 are rotatably connected inside the connecting frame 55, and the bottom of the limiting plate 51 is at the same height as the horizontal groove provided on the adjusting slot 21.

[0023] After preheating, the heat component 6 includes a heating plate 61, which is fixedly installed on the periphery of the centering seat 31. An air pressure groove 62 is provided inside the heating plate 61, and the air pressure groove 62 corresponds to the connecting groove 32. A tension spring 63 is fixedly installed inside the heating plate 61, and a piston block 64 is fixedly installed on the top of the tension spring 63. A heating groove 65 is provided on the heating plate 61, and a heating chamber 66 is fixedly connected to the top of the piston block 64. A heating head 67 is fixedly connected to the inside of the heating chamber 66. A pry bar 68 is slidably connected to the top periphery of the heating head 67. A pry electric component 69 is provided at one end of the pry bar 68 away from the heating head 67. An electronic release component 610 is fixedly connected to the bottom of the piezoelectric component 69, and an end of the electronic release component 610 away from the piezoelectric component 69 is close to the heating head 67.

[0024] The shape of the heating groove 65 is a "earth" shape, with a small diameter at one end near the top of the heating plate 61 and a large diameter at one end near the top of the tension spring 63. Example 2: Reference Figure 1-Figure 9 , which is different from Example 1, is that Example 2 provides a plasma automatic flat plate welding method for an electrolytic cell in Example 1, and further: S1: Automatic centering: Before use, the staff will place the adjustment block 22 in the adjustment groove 21 on the support plate 1 according to the length of the tailored welded plate, and then place the required tailored welded plate on the top of the pressing block 33 on the centering assembly 3, and the bottom of the pressing block 33 engages with the thread inside the centering seat 31 and moves downward, and the upper half of the centering seat 31 and the upper half of the pressing block 33 slide against each other, and at the same time, the top of the pressing block 33 drives the outer sliding plate 34 on the periphery to rotate clockwise, driving the two groups of stretching brackets 35 to rotate synchronously clockwise, and the end of the connecting plate 4 close to the stretching bracket 35 rotates on the connecting plate 4, and at the same time, the stretching connecting plate 4 approaches one end of the centering seat 31 on the centering slot 23. When the two groups of stretching brackets 35 are close to each other, At the same time, the welded plate on the centering seat 31 is automatically moved closer to the support plate 1. Then, since the adjustment block 22 is placed according to the length of the welded plate before use, when the connecting plate 4 slides on the centering groove 23, the limit plate 51 at the other end of the connecting plate 4 moves synchronously in the direction of the connecting plate 4, and the bottom of the limit plate 51 will contact the adjustment block 22. At this time, the limit plate 51 stops moving, and the limit plate 51 pulls the transverse tooth plate 52. The gears on the transverse tooth plate 52 drive the two sets of two-way gears 53 to rotate closer to each other. Due to the positional relationship between the connecting frame 55 and the clamping plate 54, the two sets of clamping plates 54 will approach each other, and the two ends of the welded plate on the pressing block 33 will be fixed, thereby achieving the effect of automatically centering and stabilizing the position of the welded plate.

[0025] S2: Preheating: When the pressing block 33 moves downward inside the centering seat 31, the bottom of the pressing block 33 will squeeze the air compression chamber 36, and the air inside the air compression chamber 36 will be squeezed from the connecting groove 32 to the inside of the air compression groove 62. The piston block 64 inside the air compression groove 62 will slide upward on the heating groove 65. At the same time, the tension spring 63 at the bottom of the piston block 64 will restore the piston block 64 after the tailor-welded plate is completed. The pry bar 68 at the top of the piston block 64 will be pressed by the heating groove 65 during the continuous upward movement of the piston block 64. 5 is squeezed, and the pry bar 68 moves downward to squeeze the piezoelectric element 69 to release the electronic spark at the electronic release element 610, and the pry bar 68 near one end of the heating head 67 will pry open the heating head 67 on the top of the heating chamber 66, and release the combustible gas from the heating head 67. At this time, the heating head 67 will heat the top support plate 1, and also heat the welded blank on the pressing block 33, so as to achieve the effect of preheating the welded blank before processing, and avoiding the cold crack caused by direct processing.

[0026] S3: Afterheat: During the process of welding the tailored plates, the tailored plates are always on the top of the pressing block 33, and the pry bar 68 will always be squeezed and compressed by the heating groove 65. When there is enough combustible gas inside the heating chamber 66, the heating head 67 will continue to heat the tailored plates, so that the tailored plates can maintain a continuous high temperature during the welding process, avoiding uneven heating that will affect the quality and performance of the welded joint.

[0027] Due to the positional relationship between the connecting frame 55 and the clamping plates 54, the two sets of clamping plates 54 are close to each other, fixing the two ends of the tailor-welded plate on the pressing block 33, thereby achieving the effect of automatically centering and stabilizing the position of the tailor-welded plate.

[0028] The pry bar 68 at one end of the heating head 67 will pry open the heating head 67 on the top of the heating chamber 66, releasing combustible gas from the heating head 67. At this time, the heating head 67 will heat the top support plate 1, and also heat the welded plate on the pressing block 33, thereby preheating the welded plate before processing to avoid cold cracks caused by direct processing.

[0029] When there is enough combustible gas inside the heating chamber 66, the heating head 67 will continue to heat the welded plates, so that the welded plates maintain a continuous high temperature during the welding process, avoiding uneven heating that affects the quality and performance of the welded joints.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above with a preferred embodiment, it is not used to limit the present invention.

Claims

1. A plasma automatic flat plate welding device for an electrolytic cell, characterized in that: The invention comprises a support plate (1), an adjusting component (2) is fixedly connected to the support plate (1), a centering component (3) is fixedly connected to the support plate (1), two groups of connecting plates (4) are slidably connected to the top of the support plate (1), a clamping component (5) is fixedly connected to the connecting plate (4), two groups of preheating and post-heating components (6) are fixedly connected to the periphery of the centering component (3), and the two groups of preheating and post-heating components (6) and the support plate (1) are fixedly connected to the periphery of the centering component (3); The regulating component (2) includes: An adjustment groove (21) is provided inside the support plate (1), and the adjustment groove (21) is provided with a horizontal groove in a direction close to the centering component (3); An adjustment block (22) corresponding to the adjustment groove (21), wherein the height of the adjustment block (22) and the height of the horizontal groove provided on the adjustment groove (21) are not on the same horizontal line; A centering slide groove (23) is provided at one end close to the centering assembly (3), and the centering slide groove (23) has the same height as a horizontal groove provided on the adjustment groove (21). A connecting plate (4) is slidably connected to the centering slide groove (23).

2. The plasma automatic flat plate welding equipment for electrolytic cell according to claim 1, characterized in that: The centering assembly (3) comprises a centering seat (31), the periphery of the centering seat (31) is fixedly connected to the support plate (1), two groups of connection grooves (32) are provided inside the centering seat (31), a pressing block (33) is connected to the inner thread of the centering seat (31), an outer slide plate (34) is fixedly connected to the periphery of the centering seat (31), a stretching bracket (35) is rotatably connected to the outer slide plate (34), and an air pressure is provided inside the centering seat (31). The air compression chamber (36) corresponds to the two groups of connecting grooves (32) on the centering seat (31), and the inner wall of the centering seat (31) and the outer wall of the pressing block (33) are provided with meshing threads, so that the pressing block (33) rotates counterclockwise upward on the centering seat (31) and rotates clockwise downward. The pressing block (33) is in a "T" shape, and the top of the thread provided on the pressing block (33) is slidably connected with the top of the thread provided on the centering seat (31).

3. The plasma automatic flat plate welding equipment for electrolytic cell according to claim 1, characterized in that: The clamping assembly (5) comprises a limit plate (51), the bottom of which is fixedly connected to the connecting plate (4), a transverse toothed plate (52) being fixedly connected to the limit plate (51), a toothed plate being provided at one end of the transverse toothed plate (52) away from the limit plate (51) and meshing with two sets of bidirectional gears (53), a clamping plate (54) being rotatably connected at one end of the bidirectional gear (53) away from the transverse toothed plate (52), a connecting frame (55) being slidably connected to the transverse toothed plate (52), and a connecting frame (55) being rotatably connected at one end of the clamping plate (54) away from the bidirectional gear (53), the two sets of bidirectional gears (53) being rotatably connected inside the connecting frame (55), and the bottom of the limit plate (51) is at the same height as a horizontal groove provided on the adjustment slot (21).

4. The plasma automatic flat plate welding equipment for electrolytic cell according to claim 1, characterized in that: The preheated hot component (6) includes a heating plate (61), the heating plate (61) is fixedly installed on the periphery of the centering seat (31), an air pressure groove (62) is formed inside the heating plate (61), the air pressure groove (62) corresponds to the connection groove (32), a tension spring (63) is fixedly installed inside the heating plate (61), a piston block (64) is fixedly installed at the top of the tension spring (63), a heating groove (65) is formed on the heating plate (61), the top of the piston block (64) is fixedly connected to a heating chamber (66), a heating head (67) is fixedly connected inside the heating chamber (66), a pry bar (68) is slidably connected to the outer periphery of the top of the heating head (67), a piezoelectric element (69) is arranged at one end of the pry bar (68) away from the heating head (67), an electronic release element (610) is fixedly connected to the bottom of the piezoelectric element (69), and one end of the electronic release element (610) away from the piezoelectric element (69) is close to the heating head (67).

5. The plasma automatic flat plate welding equipment for electrolytic cell according to claim 4, characterized in that: The shape of the heating groove (65) is "soil"-shaped, with a smaller diameter at the end close to the top of the heating plate (61) and a larger diameter at the end close to the top of the tension spring (63).

6. A plasma automatic flat plate welding method for an electrolytic cell, applied to a plasma automatic flat plate welding device for an electrolytic cell as claimed in any one of claims 1 to 5, characterized in that: The automatic flat plate welding method includes the following steps: S1: Automatic centering: Place the adjusting block (22) in the adjusting groove (21) on the support plate (1) according to the length of the welded plate, and then place the required welded plate on the top of the pressing block (33) on the centering assembly 3. The bottom of the pressing block (33) meshes with the internal thread of the centering seat (31) and moves downward. The upper half of the centering seat (31) slides with the upper half of the pressing block (33). At the same time, the top of the pressing block (33) drives the outer sliding plate (34) on the periphery to rotate clockwise, driving the two stretching brackets (35) to rotate clockwise synchronously. One end of the stretching bracket (35) close to the connecting plate (4) rotates on the connecting plate (4), and at the same time, the stretching connecting plate (4) approaches one end of the centering seat (31) on the centering chute (23). When the two stretching brackets (35) approach each other, the welded plate on the centering seat (31) is automatically moved closer to the support plate (1). Then, because the adjusting block (22) was placed according to the length of the welded plate before use, when the connecting plate (4) slides on the centering chute (23), the limiting plate (51) at the other end of the connecting plate (4) moves in the direction of the connecting plate (4) synchronously. The bottom of the limiting plate (51) will contact the adjusting block (22). At this time, the limiting plate (51) stops moving, the limiting plate (51) pulls the transverse toothed plate (52), and the gears on the transverse toothed plate (52) drive the two bidirectional gears (53) to rotate closer to each other. Due to the positional relationship between the connecting frame (55) and the clamping plate (54), the two clamping plates (54) will approach each other to fix the two ends of the welded plate on the pressing block (33).

7. A plasma automatic flat plate welding method for an electrolytic cell according to claim 6, characterized in that: The automatic flat plate welding method also includes the following steps: S2: Preheating: When the pressing block (33) moves downward inside the centering seat (31), the bottom of the pressing block (33) will squeeze the air compression chamber (36), and the air inside the air compression chamber (36) will be squeezed from the connecting groove (32) to the inside of the air compression groove (62). The piston block (64) inside the air compression groove (62) will slide upward on the heating groove (65). At the same time, the tension spring (63) at the bottom of the piston block (64) will restore the piston block (64) after the tailor-welded plate is completed, and the pry bar (68) at the top of the piston block (64) will As the piston block (64) continues to move upward, it is squeezed by the heated groove (65), and the pry bar (68) moves downward at this time, squeezing the piezoelectric element (69) to release the electronic release element (610) to release the electronic spark, and the pry bar (68) near one end of the heating head (67) will pry open the heating head (67) at the top of the heating chamber (66), releasing combustible gas from the heating head (67), and at this time the heating head (67) will heat the top support plate (1), and also heat the welded plate on the pressing block (33).

8. The plasma automatic flat plate welding method for an electrolytic cell according to claim 6, characterized in that: The automatic flat plate welding method also The following steps are involved: S3: Afterheat: During the process of welding the tailored blanks, the tailored blanks are always on the top of the pressing block (33), and the pry bar (68) will always be compressed and squeezed by the heating groove (65). When the combustible gas inside the heating chamber (66) is sufficient, the heating head (67) will continue to heat the tailored blanks.

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