A thermal simulation test machine steel plate thermocouple welding device and its use method

Abstract

The invention discloses a steel plate thermocouple welding device for a thermal simulation test machine and a method for using the device, comprising the following steps: step one, assembling the device; step two, clamping; step three, adjusting; step four, inserting; step five, approaching; step six, welding; step seven, falling off; step eight, repeating; and step nine, releasing. The steel plate thermocouple welding method for a thermal simulation test machine utilizes a transverse driving portion to drive a clamping plate to clamp the steel plate, and utilizes a welding portion to weld the thermocouple, thereby improving welding efficiency, welding accuracy, and welding quality stability, and can achieve the accuracy of welding relative positions on both sides of the steel plate, thereby improving temperature monitoring, control, and feedback accuracy; at the same time, utilizing multiple spring electrodes to contact the steel plate can prevent poor contact, and by adjusting the position and number of the spring electrodes, it can adapt to steel plates of different thicknesses and edge qualities, and the provision of an insulating cylinder ensures insulation performance, thereby increasing safety in use.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal simulation testing, in particular to a thermal simulation testing machine steel plate thermocouple welding device and a use method thereof. Background Art

[0002] Thermal simulation testing machines can simulate continuous annealing or galvanizing processes on steel plates. The simulated process curves closely match those used in actual production. They can reproduce the annealing process curves of each furnace zone in a continuous annealing or galvanizing line in industrial production under laboratory conditions, enabling research on mechanisms, process optimization, new product development, and microstructure and performance control. During process simulation, the thermal simulation machine must control the steel plate temperature to meet the process curve requirements. Therefore, several thermocouples must be welded at specific locations on both sides of the steel plate for temperature monitoring, control, and feedback.

[0003] Currently, thermocouple welding is primarily performed manually, resulting in low welding efficiency and unstable welding quality. Test failures often occur due to thermocouple detachment during thermal simulations. Furthermore, it is impossible to precisely weld thermocouples at corresponding positions on both sides of the steel plate, leading to inaccurate temperature monitoring, control, and feedback. Therefore, a device and method for welding thermocouples on steel plates in a thermal simulation test machine, and its use, are needed. These devices and methods can improve welding efficiency and welding quality stability, while also ensuring accurate welding positions to improve temperature monitoring, control, and feedback accuracy. Summary of the Invention

[0004] The object of the present invention is to provide a steel plate thermocouple welding device for a thermal simulation test machine and a method of using the same, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a thermal simulation test machine steel plate thermocouple welding device and a method for using the same, comprising the following steps: step 1, assembling the device; step 2, clamping; step 3, adjusting; step 4, inserting; step 5, approaching; step 6, welding; step 7, falling off; step 8, repeating; step 9, releasing;

[0006] In the above step 1, the steel plate thermocouple welding device of the thermal simulation test machine includes a main bracket, a support frame, a transverse drive part, a clamping mechanism, a welding part, a clamping plate, an energizing component, a support plate, an insulating pad, a stop rod, a spring electrode, an insulating cylinder, a wire, a U-shaped frame, a drive mechanism, a transmission mechanism, a welding head, a shrinkage plate, a spring, a first slide bar, an insulating flexible gasket, an electrode head, a slide, a first slider, a connecting rod, a telescopic guide rod, a second slide bar, a first telescope, a second telescope, a motor, a screw rod, a third slide bar, a second slide bar, a force-applying component, an air pressure sensor, a cylinder body and a piston, and then the above components are assembled according to the required positions;

[0007] In the above step 2, the steel plate is placed on the support plate, and the motors on both sides are controlled to rotate in opposite directions, driving the second sliders to move relative to each other, thereby driving the clamping plates to move relative to each other to clamp the steel plate. The clamping force can be monitored by the pressure of the air pressure sensor;

[0008] In the above step 3, after the steel plate is clamped stably, the motors on both sides rotate synchronously in the same direction, and the two clamping plates can drive the steel plate to move horizontally as a whole to adjust the horizontal welding position of the weld point;

[0009] In the above step 4, the thermocouple wire is inserted into the inner cavity of the insulating flexible gasket, and the thermocouple wire is clamped and fixed by the elastic deformation of the insulating flexible gasket itself;

[0010] In the above step 5, the first and second retractors are started synchronously, which can drive the slide and the first slider to move synchronously to adjust the longitudinal welding position of the weld point. During this process, the retractor plate will not move up and down. When it moves to the longitudinal position of the weld point, the first retractor stops and the second retractor continues to start, driving the first slider to slide relative to the slide, thereby pulling the retractor plate to move longitudinally through the connecting rod, and the two sets of retractor plates are synchronously close to the steel plate;

[0011] In the above step 6, the two sets of shrink plates are moved closer to the steel plate until the insulating flexible gasket contacts the steel plate. After contact, the shrink plates are moved closer to the steel plate until the thermocouple wire is stably pressed against the steel plate and the electrode head to meet the welding requirements, and then current is applied to complete the relative welding at one position.

[0012] In the above step 7, after the welding is completed, the second expansion joint is activated to move the contraction plate away from the steel plate, and the thermocouple wire is limited by the welding point and falls off from the cut part of the insulating flexible gasket;

[0013] In the above step eight, another thermocouple wire is replaced and clamped according to step three, and steps two, four, five and six are repeated to complete relative welding at other positions;

[0014] In the above step nine, after welding is completed at all required positions, the transmission mechanism, the drive mechanism and the transverse drive unit are sequentially controlled to release the clamping of the steel plate and remove the steel plate;

[0015] In the above step 10, the thermocouple wires are sequentially installed on the thermal simulation test machine controller, and then the steel plate is clamped on the heater of the thermal simulation test machine. The stable welding quality and precise welding position can improve the temperature monitoring, control and feedback accuracy.

[0016] Preferably, in step one, a support frame is fixed to the inner side of the main bracket by bolts, a clamping mechanism for clamping the steel plate is connected to the upper side of the support frame through a transverse driving part, and a welding part for welding the thermocouple is provided on the back of the main bracket; the clamping mechanism includes a splint, an insulating pad adhered to one side of the splint and a support plate fixed to the side wall of the insulating pad, and the inner side wall of one of the splints is provided with multiple groups of power-carrying components.

[0017] Preferably, in step one, the power-on component includes an insulating tube fixed to the inner wall of the splint and one end of a spring electrode fixed to the inner wall of the insulating tube, the other end of the spring electrode is connected to a wire, and the wire is connected to one end of a welding power source; the welding part includes a U-shaped frame fixed to the side wall of the main bracket by bolts, a driving mechanism arranged on one side of the U-shaped frame, and two groups of welding heads connected to the transmission mechanism through the driving mechanism.

[0018] Preferably, in step one, the welding head includes a shrinkage plate and an electrode head fixed to the inner wall of the shrinkage plate, the inner wall of the shrinkage plate is slidably connected to a first slide rod, the outer wall of the first slide rod is sleeved with a spring, the bottom of the first slide rod is bonded with an insulating flexible gasket, and the side of the insulating flexible gasket close to the steel plate is in a sheared state; the transmission mechanism includes a slide and a first slider slidably connected to the inner wall of the slide, the shrinkage plate is connected to the symmetrical sides of the slide through a telescopic guide rod, and the shrinkage plates are movably connected to the symmetrical sides of the first slider through a connecting rod.

[0019] Preferably, in step one, the driving mechanism includes a first telescope and a second telescope fixed to the side wall of the U-shaped frame by bolts, the slide is slidably connected to the U-shaped frame through the second slide rod, the telescopic end of the first telescope passes through the U-shaped frame and is fixed to the side wall of the slide by bolts, and the telescopic end of the second telescope passes through the U-shaped frame and the slide and is fixed to the side wall of the first slider by bolts.

[0020] Preferably, in step one, the transverse driving part includes two groups of motors, a second slider and a force-applying assembly, the second slider is slidably connected to the inner side of the support frame through a third slider, and the second slider and the splint are slidably connected through a linear guide rail, the motor is fixed to the outer walls of both sides of the support frame through bolts, the output shafts of the motors are connected to the screw rods through couplings, and the screw rods are respectively connected to the inner walls of the two second sliders through threads; the force-applying assembly includes a cylinder body obliquely fixed to the inner wall of the second slider and one end of a push rod slidingly fitted with the inner wall of the cylinder through a piston, the other end of the push rod is attached to the side wall of the splint, and an air pressure sensor is fixed to the inner wall of the cylinder body.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1) The present invention utilizes a transverse drive portion to drive a clamping plate to clamp a steel plate, and utilizes a welding portion to weld a thermocouple, thereby improving welding efficiency, welding accuracy, and welding quality stability. It can achieve accurate welding of the relative positions of the two sides of the steel plate, thereby improving temperature monitoring, control, and feedback accuracy.

[0023] 2) The present invention utilizes multiple spring electrodes to contact the steel plate, thereby preventing poor contact. By adjusting the position and number of the spring electrodes, it can adapt to steel plates of different thicknesses and edge qualities. The provision of the insulating tube ensures insulation performance and increases safety in use.

[0024] 3) The present invention provides a pair of welding heads to simultaneously weld the thermocouple wires on opposite sides of the steel plate, thereby improving the accuracy of the welding position and the welding efficiency. Insulating flexible gaskets are used to fix the thermocouple wires, further improving the welding quality. The device can automatically release after welding, thereby improving the convenience of the device.

[0025] 4) The present invention utilizes the cooperation of the driving mechanism and the transmission mechanism to integrate the two movements of horizontal displacement and longitudinal displacement to achieve the determination of the welding head position. The position of the driving source for the two movements remains unchanged at all times, and will not interfere with other accessories, thereby increasing the reliability of use.

[0026] 5) The present invention provides a transverse drive unit, and the combination of a drive mechanism and a transmission mechanism can realize the transverse and longitudinal movement of the welding head relative to the steel plate, thereby meeting the position requirements of multiple welding points;

[0027] 6) The present invention provides a force-applying component, utilizes air pressure as the medium for clamping force, and combines the reading of the air pressure sensor to monitor the clamping force of the steel plate through the pressure of the air pressure sensor, thereby achieving precise control of the clamping force and preventing the steel plate from warping and deformation due to excessive clamping force, which affects the welding quality;

[0028] 7) The present invention arranges the force-applying component in an inclined shape. When the clamping force is too large, the amount of contraction of the push rod after being pushed increases accordingly until the clamping force threshold is reached. The push rod is completely contracted into the cylinder body. Due to the height reason, it cannot limit the clamping plate, thus realizing the unloading of the clamping force, thereby realizing overload protection and preventing the steel plate from warping and deformation due to excessive clamping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the main structure of the clamping mechanism of the present invention;

[0031] Figure 3 This is a schematic cross-sectional view of the power supply assembly of the present invention;

[0032] Figure 4 This is a schematic structural diagram of the welding portion of the present invention;

[0033] Figure 5 This is a schematic structural diagram of the welding head of the present invention;

[0034] Figure 6 It is a schematic structural diagram of the transmission mechanism of the present invention;

[0035] Figure 7 Schematic diagram of the driving mechanism structure of the present invention;

[0036] Figure 8 This is a schematic structural diagram of the transverse drive unit of the present invention;

[0037] Figure 9 It is a schematic cross-sectional structural diagram of the force-applying component of the present invention;

[0038] Figure 10 is a flow chart of the method of the present invention;

[0039] In the figure: 1. main bracket; 2. support frame; 3. transverse drive part; 4. clamping mechanism; 5. welding part; 6. clamping plate; 7. power supply component; 8. support plate; 9. insulating pad; 10. push rod; 11. spring electrode; 12. insulating tube; 13. wire; 14. U-shaped frame; 15. drive mechanism; 16. transmission mechanism; 17. welding head; 18. retracting plate; 19. spring; 20. first slide bar; 21. insulating flexible gasket; 22. electrode head; 23. slide; 24. first slider; 25. connecting rod; 26. telescopic guide rod; 27. second slider; 28. first telescope; 29. second telescope; 30. motor; 31. screw; 32. third slide bar; 33. second slider; 34. force-applying component; 35. air pressure sensor; 36. cylinder; 37. piston. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0041] See also Figure 1-10 The present invention provides an embodiment of a thermal simulation test machine steel plate thermocouple welding device and a method for using the device, comprising the following steps: step 1, assembling the device; step 2, clamping; step 3, adjusting; step 4, inserting; step 5, approaching; step 6, welding; step 7, falling off; step 8, repeating; step 9, releasing;

[0042] In the above step 1, the steel plate thermocouple welding device of the thermal simulation test machine includes a main bracket 1, a support frame 2, a transverse drive part 3, a clamping mechanism 4, a welding part 5, a clamping plate 6, an energized component 7, a support plate 8, an insulating pad 9, a push rod 10, a spring electrode 11, an insulating cylinder 12, a wire 13, a U-shaped frame 14, a drive mechanism 15, a transmission mechanism 16, a welding head 17, a shrinkage plate 18, a spring 19, a first slide bar 20, an insulating flexible gasket 21, an electrode head 22, a slide 23, a first slider 24, a connecting rod 25, a telescopic guide rod 26, a second slide bar 27, a first telescoping device 28, a second telescoping device 29, a motor 30, a screw rod 31, and a third slide bar 3 2, the second slider 33, the force-applying component 34, the air pressure sensor 35, the cylinder 36 and the piston 37, and then assemble the above components according to the required positions; the inner side of the main bracket 1 is fixed with a support frame 2 by bolts, and the upper part of the support frame 2 is connected with a clamping mechanism 4 for clamping the steel plate through a transverse driving part 3, and the back of the main bracket 1 is provided with a welding part 5 for welding the thermocouple; the clamping mechanism 4 includes a clamping plate 6, an insulating pad 9 attached to one side of the clamping plate 6 and a support plate 8 fixed to the side wall of the insulating pad 9, and the inner side wall of one of the clamping plates 6 is provided with multiple groups of power-on components 7; when in use, the steel plate can be placed above the support plate 8, and the transverse driving part 3 is used to drive the two The clamping plate 6 clamps the steel plate. After clamping, the steel plate is energized by the power-on component 7, and the thermocouple is welded through the welding part 5, which improves the welding efficiency, welding accuracy and welding quality stability, and can achieve the accuracy of the welding position, thereby improving the temperature monitoring, control and feedback accuracy; the power-on component 7 includes an insulating cylinder 12 fixed to the inner wall of the clamping plate 6 and one end of a spring electrode 11 fixed to the inner wall of the insulating cylinder 12, the other end of the spring electrode 11 is connected to a wire 13, and the wire 13 is connected to one end of the welding power supply; the welding part 5 includes a U-shaped frame 14 fixed to the side wall of the main bracket 1 by bolts, a driving mechanism 15 arranged on one side of the U-shaped frame 14 and a driving mechanism 15 The mechanism 15 is connected to two sets of welding heads 17 of the transmission mechanism 16; the welding head 17 includes a shrinking plate 18 and an electrode head 22 fixed to the inner wall of the shrinking plate 18. By utilizing multiple spring electrodes 11 to contact the steel plate, poor contact can be prevented. By adjusting the position and number of the spring electrodes 11, it can adapt to steel plates of different thicknesses and edge qualities. The provision of the insulating cylinder 12 ensures insulation performance and increases safety in use. The inner wall of the shrinking plate 18 is slidably connected to a first sliding rod 20, and the outer wall of the first sliding rod 20 is sleeved with a spring 19. The bottom of the first sliding rod 20 is bonded with an insulating flexible gasket 21, and the side of the insulating flexible gasket 21 close to the steel plate is in a sheared state.When in use, the thermocouple wire can be inserted into the inner cavity of the insulating flexible gasket 21, and the thermocouple wire can be clamped by the elastic deformation of the insulating flexible gasket 21 itself, and then the shrinkage plate 18 is driven by the driving mechanism 15 through the transmission mechanism 16, and the two groups of shrinkage plates 18 are close to each other in the steel plate until the insulating flexible gasket 21 contacts the steel plate. After contact, the shrinkage plate 18 is further close to the steel plate until the thermocouple wire is stably pressed on the steel plate and the electrode head 22 to meet the welding requirements, and then the current is passed to complete the welding; by setting two groups of welding heads 17, the thermocouple wires on both sides of the steel plate can be welded at the same time, thereby improving the accuracy of the welding position and the welding efficiency, and the insulating flexible gasket 21 is used to fix the thermocouple wire, further improving the welding quality, and the welding The transmission mechanism 16 includes a slide 23 and a first slider 24 slidably connected to the inner wall of the slide 23. The retractable plate 18 is connected to the symmetrical sides of the slide 23 through a telescopic guide rod 26, and the retractable plates 18 are movably connected to the symmetrical sides of the first slider 24 through a connecting rod 25. The driving mechanism 15 includes a first telescopic device 28 and a second telescopic device 29 fixed to the side wall of the U-shaped frame 14 by bolts. The slide 23 is slidably connected to the U-shaped frame 14 through the second slide rod 27. The telescopic end of the first telescopic device 28 passes through the U-shaped frame 14 and is fixed to the side wall of the slide 23 by bolts. The telescopic end of the second telescopic device 29 passes through the U-shaped frame 14 and the slide 23 and is fixed to the side of the first slider 24 by bolts. When the first telescopic device 28 and the second telescopic device 29 are synchronously extended and retracted, they can drive the slide 23 and the first slider 24 to move synchronously. At this time, the retraction plate 18 will not move up and down. When it moves to the position to be welded, the first telescopic device 28 stops and the second telescopic device 29 continues to start, driving the first slider 24 to slide relative to the slide 23, thereby pulling the retraction plate 18 to move longitudinally through the connecting rod 25. The two sets of retraction plates 18 drive the two electrode heads 22 to approach the steel plate synchronously. By utilizing the cooperation of the driving mechanism 15 and the transmission mechanism 16, the two movements of horizontal displacement and longitudinal displacement can be combined to determine the position of the welding head 17. As the driving source of the two movements, its position always remains unchanged and will not interfere with other accessories, which increases the use Reliability; The transverse driving part 3 includes two groups of motors 30, a second slider 33 and a force-applying assembly 34. The second slider 33 is slidably connected to the inner side of the support frame 2 through the third slider 32, and the second slider 33 is slidably connected to the splint 6 through a linear guide rail. The motor 30 is fixed to the outer walls of both sides of the support frame 2 by bolts, and the output shaft of the motor 30 is connected to the screw rod 31 through a coupling, and the screw rod 31 is respectively connected to the inner side walls of the two second sliders 33 through threads; the force-applying assembly 34 includes a cylinder body 36 obliquely fixed to the inner side wall of the second slider 33 and one end of the push rod 10 slidingly fitted with the inner wall of the cylinder body 36 through a piston 37, and the other end of the push rod 10 is attached to the side wall of the splint 6, and an air pressure sensor 35 is fixed to the inner wall of the cylinder body 36;By setting a force-applying component 34 and utilizing air pressure as a medium for the clamping force, combined with the reading of the air pressure sensor 35, the clamping force of the steel plate can be monitored by monitoring the pressure of the air pressure sensor 35, thereby achieving precise control of the clamping force; by setting the force-applying component 34 to an inclined shape, when the clamping force is too large, the amount of contraction of the push rod 10 after receiving the thrust increases accordingly, until the clamping force threshold is reached, and the push rod 10 is completely contracted into the cylinder body 36. Due to the height, it cannot limit the clamping plate 6, thus achieving unloading of the clamping force, thereby achieving overload protection, and preventing the steel plate from being warped and deformed due to excessive clamping force, which affects the welding position and welding quality;

[0043] In the above step 2, the steel plate is placed on the support plate 8, and the motors 30 on both sides are controlled to rotate in opposite directions, driving the second sliders 33 to move relative to each other, thereby driving the clamping plates 6 to move relative to each other to clamp the steel plate. The clamping force can be monitored by the pressure of the air pressure sensor 35;

[0044] In the above step 3, after the steel plate is clamped stably, the motors 30 on both sides rotate synchronously in the same direction, and the two clamping plates 6 can drive the steel plate to move horizontally as a whole to adjust the horizontal welding position of the welding point;

[0045] In the above step 4, the thermocouple wire is inserted into the inner cavity of the insulating flexible gasket 21, and the thermocouple wire is clamped and fixed by the elastic deformation of the insulating flexible gasket 21 itself;

[0046] In the above step five, the first retractor 28 and the second retractor 29 are synchronously started, which can drive the slide 23 and the first slider 24 to move synchronously to adjust the longitudinal welding position of the weld point. During this process, the contraction plate 18 will not move up and down. When it moves to the longitudinal position of the weld point, the first retractor 28 stops and the second retractor 29 continues to start, driving the first slider 24 to slide relative to the slide 23, thereby pulling the contraction plate 18 to move longitudinally through the connecting rod 25. The two sets of contraction plates 18 are synchronously close to the steel plate;

[0047] In the above step 6, the two sets of shrink plates 18 are moved closer to the steel plate until the insulating flexible gasket 21 contacts the steel plate. After contact, the shrink plates 18 are moved closer to the steel plate until the thermocouple wire is stably pressed against the steel plate and the electrode head 22 to meet the welding requirements. Then, current is passed to complete the relative welding of one position.

[0048] In the above step 7, after the welding is completed, the second retractor 29 is activated to move the retractable plate 18 away from the steel plate, and the thermocouple wire is limited by the welding point and falls off from the cut part of the insulating flexible gasket 21;

[0049] In the above step eight, another thermocouple wire is replaced and clamped according to step three, and steps two, four, five and six are repeated to complete relative welding at other positions;

[0050] In the above step nine, after welding is completed at all required positions, the transmission mechanism 16, the drive mechanism 15 and the transverse drive unit 3 are controlled in sequence to release the clamping of the steel plate and remove the steel plate;

[0051] In the above step 10, the thermocouple wires are sequentially installed on the thermal simulation test machine controller, and then the steel plate is clamped on the heater of the thermal simulation test machine. The stable welding quality and precise welding position can improve the temperature monitoring, control and feedback accuracy.

[0052] Based on the above, the advantage of the present invention is that the thermal simulation test machine steel plate thermocouple welding device and its use method proposed in the invention can improve welding efficiency and welding quality stability and achieve the accuracy of welding position, thereby improving temperature monitoring, control and feedback accuracy.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for using a steel plate thermocouple welding device of a thermal simulation test machine, comprising the following steps: Step 1, assembling the equipment; Step 2, clamping; Step 3, adjusting; Step 4, inserting; Step 5, approaching; Step 6, welding; Step 7, falling off; Step 8, repeating; Step 9, releasing; It is characterized in that: in the above step 1, the steel plate thermocouple welding device of the thermal simulation test machine includes a main bracket (1), a support frame (2), a transverse driving part (3), a clamping mechanism (4), a welding part (5), a clamping plate (6), an energizing component (7), a support plate (8), an insulating pad (9), a push rod (10), a spring electrode (11), an insulating tube (12), a wire (13), a U-shaped frame (14), a driving mechanism (15 ), transmission mechanism (16), welding head (17), shrink plate (18), spring (19), first slide bar (20), insulating flexible gasket (21), electrode head (22), slide (23), first slider (24), connecting rod (25), telescopic guide rod (26), second slide bar (27), first telescoping device (28), second telescoping device (29), motor (30), screw rod (31), third slide bar (32), second slide bar (33), force applying assembly (34), air pressure sensor (35), cylinder (36) and piston (37), and then assemble the above components according to the required positions; In the above step 2, the steel plate is placed above the support plate (8), and the motors (30) on both sides are controlled to rotate in opposite directions, driving the second sliders (33) to move relative to each other, thereby driving the clamping plates (6) to move relative to each other to clamp the steel plate, and the clamping force is monitored by the pressure of the air pressure sensor (35); In the above step 3, after the steel plate is clamped stably, the motors (30) on both sides rotate synchronously in the same direction, and the two clamping plates (6) drive the steel plate to move horizontally as a whole, thereby adjusting the horizontal welding position of the welding point; In the above step 4, the thermocouple wire is inserted into the inner cavity of the insulating flexible gasket (21), and the thermocouple wire is clamped and fixed by the elastic deformation of the insulating flexible gasket (21); In the above step five, the first telescopic device (28) and the second telescopic device (29) are synchronously started to drive the slide (23) and the first slider (24) to move synchronously, and the longitudinal welding position of the welding point is adjusted. During this process, the shrinkage plate (18) does not move up and down. When it moves to the longitudinal position of the welding point, the first telescopic device (28) stops, and the second telescopic device (29) continues to start, driving the first slider (24) to slide relative to the slide (23), thereby pulling the shrinkage plate (18) to move longitudinally through the connecting rod (25), and the two groups of shrinkage plates (18) are synchronously close to the steel plate; In the above step 6, the two sets of shrink plates (18) are moved closer to the steel plate until the insulating flexible gasket (21) contacts the steel plate. After the contact, the shrink plates (18) are moved closer to the steel plate until the thermocouple wire is stably pressed against the steel plate and the electrode head (22) to meet the welding requirements, and then the current is passed to complete the welding of one position. In the above step 7, after the welding is completed, the second expansion joint (29) is started to move the contraction plate (18) away from the steel plate, and the thermocouple wire is limited by the welding point and falls off from the cut part of the insulating flexible gasket (21); In the above step eight, another thermocouple wire is clamped and fixed according to step three, and steps two, four, five and six are repeated to complete welding at other positions; In the above step nine, after welding is completed at all required positions, the transmission mechanism (16), the drive mechanism (15) and the transverse drive unit (3) are controlled in sequence to release the clamping of the steel plate and remove the steel plate; In the step 1, a support frame (2) is fixed to the inner side of the main frame (1) by bolts, a clamping mechanism (4) for clamping the steel plate is connected to the upper side of the support frame (2) via a transverse driving portion (3), and a welding portion (5) for welding the thermocouple is provided on the back of the main frame (1); the clamping mechanism (4) includes a clamping plate (6), an insulating pad (9) adhered to one side of the clamping plate (6), and a support plate (8) fixed to the side wall of the insulating pad (9), and a plurality of groups of power supply components (7) are provided on the inner side wall of one of the clamping plates (6); In the step 1, the power supply assembly (7) includes an insulating tube (12) fixed to the inner wall of the clamping plate (6) and one end of a spring electrode (11) fixed to the inner wall of the insulating tube (12), the other end of the spring electrode (11) is connected to a wire (13), and the wire (13) is connected to one end of a welding power source; the welding part (5) includes a U-shaped frame (14) fixed to the side wall of the main bracket (1) by bolts, a driving mechanism (15) provided on one side of the U-shaped frame (14), and two sets of welding heads (17) connected to the transmission mechanism (16) through the driving mechanism (15); In the step 1, the welding head (17) includes a shrinkage plate (18) and an electrode head (22) fixed to the inner wall of the shrinkage plate (18), the inner wall of the shrinkage plate (18) is slidably connected to a first slide bar (20), the outer wall of the first slide bar (20) is sleeved with a spring (19), the bottom of the first slide bar (20) is bonded with an insulating flexible gasket (21), and the side of the insulating flexible gasket (21) close to the steel plate is in a sheared state; the transmission mechanism (16) includes a slide (23) and a first slider (24) slidably connected to the inner wall of the slide (23), the shrinkage plate (18) is connected to the symmetrical sides of the slide (23) through a telescopic guide rod (26), and the shrinkage plate (18) is movably connected to the symmetrical sides of the first slider (24) through a connecting rod (25).

2. The method for using the steel plate thermocouple welding device of a thermal simulation test machine according to claim 1, characterized in that: In the step 1, the driving mechanism (15) includes a first telescopic device (28) and a second telescopic device (29) fixed to the side wall of the U-shaped frame (14) by bolts, and the slide (23) is slidably connected to the U-shaped frame (14) through the second slide bar (27). The telescopic end of the first telescopic device (28) passes through the U-shaped frame (14) and is fixed to the side wall of the slide (23) by bolts, and the telescopic end of the second telescopic device (29) passes through the U-shaped frame (14) and the slide (23) and is fixed to the side wall of the first slider (24) by bolts.

3. The method for using the steel plate thermocouple welding device of a thermal simulation test machine according to claim 1, characterized in that: In the step 1, the transverse driving part (3) includes two groups of motors (30), a second slider (33) and a force-applying assembly (34), the second slider (33) is slidably connected to the inner side of the support frame (2) through the third slider (32), and the second slider (33) is slidably connected to the clamping plate (6) through a linear guide rail, the motor (30) is fixed to the outer walls of both sides of the support frame (2) by bolts, the output shaft of the motor (30) is connected to the screw rod (31) through a coupling, and the screw rod (31) is respectively connected to the inner side walls of the two second sliders (33) through threads; the force-applying assembly (34) includes a cylinder (36) fixed obliquely to the inner side wall of the second slider (33) and one end of a push rod (10) slidably fitted to the inner wall of the cylinder (36) through a piston (37), the other end of the push rod (10) is attached to the side wall of the clamping plate (6), and an air pressure sensor (35) is fixed to the inner wall of the cylinder (36).

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