A welding device and welding process for sheet metal processing of industrial water chillers

Abstract

The present application relates to sheet metal processing technical field, disclose a kind of welding equipment and welding process for sheet metal processing of industrial water chiller, the welding equipment includes: welding machine tool, its working area is equipped with mirror image symmetry solid material mechanism, the double solid material mechanism is configured to the two parts of the sheet metal piece to be welded are synchronously clamped to implement three-dimensional docking;Solid material mechanism includes: adjusting head, for clamping sheet metal piece;Paste board piece, by measuring curve vertical plate and measuring curve horizontal plate constitute T type structure, measuring curve horizontal plate is rotatably connected with adjusting head side wall, and when measuring curve vertical plate and measuring curve horizontal plate are unfolded to working position, the lower surface of two and the upper surface of sheet metal piece clamped by adjusting head are flush;The present application realizes the precision control of sheet metal welding of industrial water chiller by the collaborative design of double solid material mechanism and three-dimensional deformation compensation system, and the rigid docking datum in three-dimensional space is built by the two parts of the mirror image symmetry solid material mechanism through synchronous clamping sheet metal piece to be welded, effectively eliminates the assembly error caused by traditional single side fixing.

Description

Technical Field

[0001] This invention relates to the field of sheet metal processing, and more specifically, to a welding device and welding process for sheet metal processing of industrial chillers. Background Technology

[0002] In the manufacturing of industrial chillers, sheet metal processing is a core step, and welding, as a key process for connecting sheet metal parts, directly affects the structural strength, sealing performance, and service life of the equipment.

[0003] Sheet metal parts (especially thin-walled stainless steel / carbon steel) are prone to micro-bending during cutting, handling, and clamping, typically by 0.1-2mm. Thermal stress during welding further exacerbates this deformation. Existing fixtures can only statically fix the workpiece and cannot detect dynamic deformation and adjust it in real time, leading to weld misalignment and seal failure. Therefore, we propose a welding equipment and welding process for sheet metal processing in industrial chillers. Summary of the Invention

[0004] The first invention provides a welding equipment and welding process for sheet metal processing of industrial chillers, which solves the technical problem in related technologies that the fixture can only statically fix the workpiece and cannot detect dynamic deformation and adjust it in real time, resulting in weld misalignment and sealing failure.

[0005] The present invention provides a welding device for sheet metal processing of industrial chillers, comprising: a welding machine tool, wherein the working area is provided with a mirror-symmetrical material fixing mechanism, the mirror-symmetrical material fixing mechanism being configured to simultaneously clamp the two parts of the sheet metal parts to be welded and perform three-dimensional docking.

[0006] The solid material mechanism includes:

[0007] Adjustment head, used to clamp sheet metal parts;

[0008] The mounting plate is composed of a longitudinal measuring plate and a transverse measuring plate forming a T-shaped structure. The transverse measuring plate is rotatably connected to the side wall of the adjusting head. When the longitudinal measuring plate and the transverse measuring plate are unfolded to the working position, their lower surfaces are flush with the upper surface of the sheet metal part held by the adjusting head.

[0009] The sheet metal bending test component includes multiple sets of bending test heads distributed along the surface of the bending test longitudinal plate and the bending test transverse plate. Each set of bending test heads is equipped with a corresponding liquid reservoir on its inner side. All liquid reservoirs are connected to the pressure sensor through pipelines.

[0010] When a sheet metal part bends and deforms, the deformation area generates a pressure difference on the corresponding measuring heads on the measuring longitudinal plate and the measuring transverse plate. The pressure sensor transmits the pressure data to the control system. The control system calculates the deformation based on the pressure difference and controls the fixing mechanism to perform compensation and adjustment. Automatic calibration welding of the sheet metal part is achieved by adjusting the displacement of the adjusting head.

[0011] Furthermore, a welding head is provided at the top of the working area of ​​the welding machine tool, which can perform welding according to the welding seam position of the sheet metal part.

[0012] Furthermore, the fixing mechanism also includes a pneumatic clamping plate component. The output end of the pneumatic clamping plate component is equipped with clamping claws, and the adjusting head is slidably disposed on the side wall of the clamping claws. The clamping claws fix the sheet metal parts under the pneumatic control of the pneumatic clamping plate component.

[0013] Furthermore, the measuring head includes a limiting post, which penetrates the side plate of the measuring longitudinal plate. A pressure plate head is fixedly installed on one side of the limiting post, and a pressure bladder plate is fixedly installed on the other side of the limiting post. The pressure bladder plate, the limiting post, and the pressure plate head are in an I-shape.

[0014] Furthermore, the interior of the measuring longitudinal plate is fixed with several fixed bladder seats, each corresponding to a liquid storage bladder. The side of the fixed bladder seat closest to the liquid storage bladder is grooved, and the groove shape matches the shape of the liquid storage bladder. The side of the liquid storage bladder away from the fixed bladder seat is in contact with the pressure plate.

[0015] Furthermore, the inside of the liquid storage bladder is fixedly equipped with several pressure-bearing air rings, which support the shape of the liquid storage bladder, and the output end of the liquid storage bladder is connected to a liquid passage pipe.

[0016] Furthermore, a sensor box is fixedly installed on the upper wall of the pneumatic clamping plate, and a pressure sensor is installed in the sensor box. There are several pressure sensors, each corresponding to one of the several liquid storage bladders.

[0017] Furthermore, the ends of several liquid-passing tubes away from their corresponding liquid storage bladders are fixedly connected to the pressure sensor. A protective main pipe connects the measuring longitudinal plate and the sensor box. Several liquid-passing tubes run along the protective main pipe to protect them.

[0018] Furthermore, a protective groove is provided on the side wall of the adjusting head, and a limit block is fixedly provided on the back of the measuring cross plate. The limit block is movably connected to the protective groove. Multiple flattening springs are fixedly provided on the side of the limit block near the inner wall of the protective groove. A pull buckle is fixedly provided at the splicing position of the measuring longitudinal plate and the measuring cross plate. A control plate rope is fixedly provided on the pull buckle. An electromagnet is fixedly provided at the end of the control plate rope away from the pull buckle. The electromagnet is installed in the corresponding adjusting head.

[0019] A second aspect of the present invention provides a welding process for welding equipment used in sheet metal processing of industrial chillers, comprising the following steps:

[0020] S1. Clamp the two sheet metal parts to be welded in the adjusting heads of the two fixing mechanisms respectively, and fix them by driving the clamping jaws through the pneumatic clamping plate components. Adjust the position of the pneumatic clamping plate components so that the two sheet metal parts are precisely aligned to the welding station in three-dimensional space.

[0021] S2. The control system drives the electromagnet to retract, and releases the longitudinal and transverse measuring plates through the control plate rope. Under the action of the push-flat spring, the T-shaped longitudinal and transverse measuring plates are unfolded to the working position, and their lower surfaces are completely in contact with the upper surface of the sheet metal parts.

[0022] S3. When the sheet metal part is bent, the deformation area generates differential pressure on the measuring head. The pressure is transmitted to the liquid storage bladder through the pressure plate head, and the pressure data is transmitted to the pressure sensor group in the sensor box through the liquid passage tube. The control system calculates the three-dimensional deformation of the sheet metal part based on multiple pressure differences.

[0023] S4. Based on the deformation data, the control system simultaneously performs two operations:

[0024] The welding head is driven to perform adaptive path planning along the weld seam trajectory;

[0025] The spatial posture of the sheet metal parts is adjusted by adjusting the displacement mechanism of the head, so that the two welding surfaces maintain the alignment accuracy required by the welding process in real time.

[0026] S5. After welding is completed, the electromagnet extends and tightens the control plate rope, which drives the longitudinal and transverse measuring plates to overcome the elastic force of the flattening spring and return to the storage state. At the same time, the liquid storage bladder achieves deformation reset through the pressure-bearing air ring, preparing for the next welding cycle.

[0027] The beneficial effects of this invention are as follows:

[0028] This invention achieves revolutionary precision control in sheet metal welding for industrial chillers through the collaborative design of a dual-fixed-material mechanism and a three-dimensional deformation compensation system. The mirror-symmetrical fixed-material mechanism synchronously clamps the two parts of the sheet metal to be welded, constructing a rigid docking benchmark in three-dimensional space, effectively eliminating assembly errors caused by traditional single-sided fixing. Its core innovation lies in integrating a T-shaped plate consisting of a longitudinal measuring plate and a transverse measuring plate into the adjusting head. Through a flush surface design, the detection component and the workpiece are physically coupled. When the sheet metal undergoes micron-level bending deformation due to welding thermal stress, the deformation area directly acts on the corresponding measuring head and triggers pressure changes in the reservoir, significantly reducing the assembly gap of the chiller's sheet metal shell and effectively avoiding the risk of sealing failure due to thermal deformation. Attached Figure Description

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

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

[0031] Figure 3 This is the invention Figure 2 Enlarged view of point A in the middle;

[0032] Figure 4 This is a schematic diagram of the adjusting head structure of the present invention;

[0033] Figure 5 This is a schematic diagram of the back structure of the longitudinal measuring plate of the present invention;

[0034] Figure 6 This is a schematic diagram of the front structure of the longitudinal measuring plate of the present invention;

[0035] Figure 7 This is a schematic diagram of the internal structure of the longitudinal measuring plate of the present invention;

[0036] Figure 8 This is a schematic diagram of the liquid storage bladder structure of the present invention.

[0037] In the diagram: 11. Welding machine tool; 12. Welding head; 2. Material fixing mechanism; 21. Pneumatic clamping plate; 22. Clamping claw; 23. Adjusting head; 24. Protective groove; 31. Curvature measuring longitudinal plate; 32. Curvature measuring transverse plate; 33. Limiting block; 34. Pushing spring; 35. Pull buckle; 36. Protective main pipe; 37. Control plate rope; 38. Electromagnet; 42. Pressure plate head; 43. Curvature measuring head; 45. Limiting post; 46. Pressure bladder plate; 47. Fixed bladder seat; 48. Liquid storage bladder; 49. Liquid passage pipe; 401. Pressure-bearing air ring; 402. Sensor box. Detailed Implementation

[0038] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples. Example 1

[0039] like Figures 1-8 As shown, a welding device for sheet metal processing of industrial chillers includes: a welding machine tool 11, the working area of ​​which is provided with a mirror-symmetrical material fixing mechanism 2, the mirror-symmetrical material fixing mechanism 2 being configured to simultaneously clamp the two parts of the sheet metal parts to be welded and perform three-dimensional docking.

[0040] The solid material mechanism 2 includes:

[0041] Adjustment head 23 is used to clamp sheet metal parts;

[0042] The mounting plate is composed of a T-shaped structure consisting of a longitudinal measuring plate 31 and a transverse measuring plate 32. The transverse measuring plate 32 is rotatably connected to the side wall of the adjusting head 23. When the longitudinal measuring plate 31 and the transverse measuring plate 32 are unfolded to the working position, their lower surfaces are flush with the upper surface of the sheet metal part held by the adjusting head 23.

[0043] The sheet metal bending test component includes multiple sets of bending test heads 43 distributed along the surfaces of the bending test longitudinal plate 31 and the bending test transverse plate 32. Each set of bending test heads 43 has a corresponding liquid reservoir 48 inside. All liquid reservoirs 48 are connected to the pressure sensor through pipelines.

[0044] When the sheet metal part is bent and deformed, the deformation area generates a pressure difference on the corresponding measuring head 43 on the measuring longitudinal plate 31 and the measuring transverse plate 32. The pressure sensor transmits the pressure data to the control system. The control system calculates the deformation based on the pressure difference and controls the fixing mechanism 2 to perform compensation adjustment. Automatic calibration welding of the sheet metal part is achieved by adjusting the displacement of the adjusting head 23.

[0045] A welding head 12 is provided in the top area directly above the working area of ​​the welding machine tool 11. The welding head 12 can perform welding according to the welding seam position of the sheet metal part.

[0046] The fixing mechanism 2 also includes a pneumatic clamping plate 21. The output end of the pneumatic clamping plate 21 is provided with a clamping claw 22. The adjusting head 23 is slidably disposed on the side wall of the clamping claw 22. The clamping claw 22 fixes the sheet metal part under the pneumatic control of the pneumatic clamping plate 21.

[0047] The measuring head 43 includes a limiting post 45, which passes through the side plate of the measuring longitudinal plate 31. A pressure plate head 42 is fixedly provided on one side of the limiting post 45, and a pressure bladder plate 46 is fixedly provided on the other side of the limiting post 45. The pressure bladder plate 46, the limiting post 45 and the pressure plate head 42 are in the shape of an I.

[0048] The measuring longitudinal plate 31 has several fixed bladder seats 47 inside, and each fixed bladder seat 47 corresponds to a liquid storage bladder 48. The side of the fixed bladder seat 47 near the liquid storage bladder 48 is grooved, and the groove shape matches the shape of the liquid storage bladder 48. The side of the liquid storage bladder 48 away from the fixed bladder seat 47 is in contact with the pressure plate 46.

[0049] The liquid storage bladder 48 has several pressure-bearing gas rings 401 fixedly installed inside, and the pressure-bearing gas rings 401 support the shape of the liquid storage bladder 48. The output end of the liquid storage bladder 48 is connected to a liquid passage pipe 49.

[0050] A sensor box 402 is fixedly installed on the upper wall of the pneumatic clamp 21. The pressure sensor is installed in the sensor box 402, and there are several pressure sensors, which correspond one-to-one with several liquid storage bladders 48.

[0051] Several liquid-conducting tubes 49 are fixedly connected at one end away from the corresponding liquid storage bladder 48 to the pressure sensor. A protective main pipe 36 is connected between the measuring longitudinal plate 31 and the sensor box 402. The liquid-conducting tubes 49 are all routed along the protective main pipe 36 to protect the liquid-conducting tubes 49.

[0052] The side wall of the adjusting head 23 is also provided with a protective groove 24. A limit block 33 is fixedly provided on the back of the measuring cross plate 32. The limit block 33 is movably connected to the protective groove 24. Multiple flattening springs 34 are fixedly provided on the side of the limit block 33 near the inner wall of the protective groove 24. A pull buckle 35 is fixedly provided at the splicing position of the measuring longitudinal plate 31 and the measuring cross plate 32. A control plate rope 37 is fixedly provided on the pull buckle 35. An electromagnet 38 is fixedly provided at the end of the control plate rope 37 away from the pull buckle 35. The electromagnet 38 is installed in the corresponding adjusting head 23. Example 2

[0053] A welding process for welding equipment used in sheet metal processing of industrial chillers includes the following steps:

[0054] S1. The two sheet metal parts to be welded are clamped in the adjusting heads 23 of the two fixing mechanisms 2 respectively. The clamping claws 22 are driven by the pneumatic clamping plate 21 to fix them. The position of the pneumatic clamping plate 21 is adjusted so that the two sheet metal parts are precisely aligned to the welding station in three-dimensional space.

[0055] The pneumatic clamping plate 21 drives the clamping claw 22 to quickly clamp the sheet metal parts. Combined with the spatial displacement capability of the degree-of-freedom adjustment head 23, it ensures the precise alignment of the two sheet metal parts in the X, Y, and Z axis directions, eliminates manual alignment errors, and improves welding accuracy.

[0056] The pneumatic clamping method provides uniform and adjustable clamping force, preventing sheet metal parts from shifting due to thermal deformation or vibration during welding, and ensuring the stability of the welding process.

[0057] S2. The control system drives the electromagnet 38 to retract, and releases the longitudinal measuring plate 31 and the transverse measuring plate 32 through the control plate rope 37. Under the action of the push-flat spring 34, the T-shaped longitudinal measuring plate 31 and the transverse measuring plate 32 are unfolded to the working position, and their lower surfaces are completely in contact with the upper surface of the sheet metal part.

[0058] By linking the electromagnet 38 with the control plate rope 37, the automatic unfolding and retraction of the longitudinal measuring plate 31 and the transverse measuring plate 32 are realized, reducing manual operation steps and shortening the process preparation time.

[0059] The elastic drive of the flattening spring 34 makes the T-shaped measuring plate completely fit with the surface of the sheet metal part, ensuring direct contact between the pressure detection point and the deformation area of ​​the sheet metal part, and improving the sensitivity of bending detection.

[0060] S3. When the sheet metal part is bent, the deformation area generates differential pressure on the measuring head 43. The pressure is transmitted to the liquid storage bladder 48 through the pressure plate head 42. The pressure data is transmitted to the pressure sensor group in the sensor box 402 through the liquid passage pipe 49. The control system calculates the three-dimensional deformation of the sheet metal part based on multiple pressure differences.

[0061] Multiple sets of measuring heads 43 and liquid reservoir 48 form a distributed pressure detection network, which can accurately locate the bending position and deformation of sheet metal parts through pressure difference, and the detection resolution can reach the millimeter level.

[0062] The pressure sensor data is transmitted to the control system in real time, enabling synchronous response of deformation and compensation actions. The detection cycle is short, meeting the real-time requirements of high-speed welding scenarios.

[0063] S4. Based on the deformation data, the control system simultaneously performs two operations:

[0064] The welding head 12 is driven to perform adaptive path planning along the weld seam trajectory;

[0065] The spatial posture of the sheet metal parts is adjusted by adjusting the displacement mechanism of the head 23, so that the two welding surfaces maintain the alignment accuracy required by the welding process in real time.

[0066] S5. After welding is completed, the electromagnet 38 extends and tightens the control plate rope 37, which drives the measuring longitudinal plate 31 and the measuring transverse plate 32 to overcome the elastic force of the push-flat spring 34 and return to the storage state. At the same time, the liquid storage bladder 48 achieves deformation reset through the pressure-bearing gas ring 401, preparing for the next welding cycle.

[0067] When welding the sheet metal shell of an industrial chiller, the workers need to clamp the two sheet metal parts to be welded in the adjusting heads 23 of the two fixing mechanisms 2 respectively. The adjusting heads 23 are controlled by the pneumatic clamping plate 21 to fix the respective sheet metal parts, and the position of the pneumatic clamping plate 21 is changed to align the two sheet metal parts to the welding position.

[0068] After the two adjusting heads 23 clamp their respective sheet metal parts, the electromagnet 38 is controlled by the system to extend its telescopic column, thereby releasing the control plate rope 37. When the control plate rope 37 is released, the T-shaped longitudinal and transverse measuring plates 31 and 32 are pushed by the elastic force of several flattening springs 34, causing them to unfold and become perpendicular to the adjusting heads 23, thus achieving parallelism and fit with the sheet metal parts.

[0069] When the sheet metal part is not bent, the pressing force of the sheet metal part on the pressure plate head 42 of the bending longitudinal plate 31 and the bending transverse plate 32 is the same, and the multiple pressure bladder plates 46 press the liquid storage bladder 48 to the same degree. The data transmitted to the pressure sensor through the liquid passage pipe 49 is the same. At this time, the welding head 12 performs welding according to the program design.

[0070] When the sheet metal parts bend, the pressure on the multiple pressure plates 42 is different, and the data detected by the multiple pressure sensors is different. At this time, the system calculates based on the data from the multiple pressure sensors and adjusts the position or angle of the welding head 12 and the pneumatic clamping plate 21 to adjust the two sheet metal parts to a range where welding can be performed.

[0071] The longitudinal measuring plate 31 and the transverse measuring plate 32 can detect the bending of sheet metal parts in two directions, respectively.

[0072] After welding is completed, the telescopic column is retracted by electromagnet 38, the control plate rope 37 is tightened, and the measuring head 43 is retracted again.

[0073] The pressure-bearing air ring 401 inside the reservoir 48 can ensure that the reservoir 48 can quickly recover after being squeezed.

[0074] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of the present embodiments, all of which are within the protection scope of the present embodiments.

Claims

1. A welding device for sheet metal processing of industrial chillers, characterized in that, include: The welding machine tool (11) has a mirror-symmetric material fixing mechanism (2) in its working area. The mirror-symmetric material fixing mechanism (2) is configured to simultaneously clamp the two parts of the sheet metal to be welded and perform three-dimensional docking. The solidification mechanism (2) includes: Adjustment head (23) is used to clamp sheet metal parts; The plate component is composed of a longitudinal measuring plate (31) and a transverse measuring plate (32) forming a T-shaped structure. The transverse measuring plate (32) is rotatably connected to the side wall of the adjusting head (23). When the longitudinal measuring plate (31) and the transverse measuring plate (32) are unfolded to the working position, their lower surfaces are flush with the upper surface of the sheet metal part held by the adjusting head (23). The sheet metal measuring component includes multiple sets of measuring heads (43) distributed along the surface of the measuring longitudinal plate (31) and the measuring transverse plate (32). Each set of measuring heads (43) has a corresponding liquid reservoir (48) inside. All liquid reservoirs (48) are connected to the pressure sensor through pipelines. A welding head (12) is provided in the top area directly above the working area of ​​the welding machine tool (11). The welding head (12) can perform welding according to the welding seam position of the sheet metal part. The fixing mechanism (2) also includes a pneumatic clamping plate (21), the output end of which is provided with a clamping claw (22), the adjusting head (23) is slidably disposed on the side wall of the clamping claw (22), and the clamping claw (22) fixes the sheet metal part under the pneumatic control of the pneumatic clamping plate (21); The side wall of the adjusting head (23) is also provided with a protective groove (24). A limit block (33) is fixedly provided on the back of the measuring cross plate (32). The limit block (33) is movably connected to the protective groove (24). A plurality of flattening springs (34) are fixedly provided on the side of the limit block (33) near the inner wall of the protective groove (24). A pull buckle (35) is fixedly provided at the splicing position of the measuring longitudinal plate (31) and the measuring cross plate (32). A control plate rope (37) is fixedly provided on the pull buckle (35). An electromagnet (38) is fixedly provided at the end of the control plate rope (37) away from the pull buckle (35). The electromagnet (38) is installed in the corresponding adjusting head (23). When the sheet metal part is bent and deformed, the deformation area generates a pressure difference on the corresponding measuring head (43) on the measuring longitudinal plate (31) and the measuring transverse plate (32). The pressure sensor transmits the pressure data to the control system. The control system calculates the deformation based on the pressure difference and controls the fixing mechanism (2) to implement compensation adjustment. Automatic calibration welding of the sheet metal part is achieved by adjusting the displacement of the head (23).

2. The welding equipment for sheet metal processing of industrial chillers according to claim 1, characterized in that, The measuring head (43) includes a limiting post (45), which passes through the side plate of the measuring longitudinal plate (31). A pressure plate head (42) is fixedly provided on one side of the limiting post (45), and a pressure bladder plate (46) is fixedly provided on the other side of the limiting post (45). The pressure bladder plate (46), the limiting post (45), and the pressure plate head (42) are in the shape of an I-beam.

3. The welding equipment for sheet metal processing of industrial chillers according to claim 2, characterized in that, The measuring longitudinal plate (31) has several fixed bladder seats (47) inside. Each fixed bladder seat (47) corresponds to a liquid storage bladder (48). The side of the fixed bladder seat (47) near the liquid storage bladder (48) is grooved and the grooved shape matches the shape of the liquid storage bladder (48). The side of the liquid storage bladder (48) away from the fixed bladder seat (47) is in contact with the pressure plate (46).

4. The welding equipment for sheet metal processing of industrial chillers according to claim 3, characterized in that, The reservoir (48) has several pressure-bearing air rings (401) fixedly installed inside, and the pressure-bearing air rings (401) support the shape of the reservoir (48). The output end of the reservoir (48) is connected to a liquid-passing pipe (49).

5. The welding equipment for sheet metal processing of industrial chillers according to claim 4, characterized in that, A sensor box (402) is fixedly installed on the upper wall of the pneumatic clamp (21). The pressure sensor is installed in the sensor box (402), and there are several pressure sensors, which correspond one-to-one with several liquid storage bladders (48).

6. The welding equipment for sheet metal processing of industrial chillers according to claim 5, characterized in that, One end of each of the liquid-conducting tubes (49) away from the corresponding liquid storage bladder (48) is fixedly connected to the pressure sensor. A protective main pipe (36) is connected between the measuring longitudinal plate (31) and the sensor box (402). Each of the liquid-conducting tubes (49) runs along the protective main pipe (36) to protect the liquid-conducting tubes (49).

7. A welding process using the welding equipment for sheet metal processing of industrial chillers as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Clamp the two sheet metal parts to be welded in the adjusting heads (23) of the two fixing mechanisms (2), and fix them by driving the clamping claws (22) through the pneumatic clamping plate (21). Adjust the position of the pneumatic clamping plate (21) so that the two sheet metal parts are precisely aligned to the welding station in three-dimensional space. S2. The control system drives the electromagnet (38) to retract, and releases the longitudinal measuring plate (31) and the transverse measuring plate (32) through the control plate rope (37). Under the elastic force of the push flat spring (34), the T-shaped longitudinal measuring plate (31) and the transverse measuring plate (32) are unfolded to the working position, and their lower surface is completely in contact with the upper surface of the sheet metal part. S3. When the sheet metal part is bent, the deformation area generates differential pressure on the measuring head (43). The pressure is transmitted to the reservoir (48) through the pressure plate head (42). The pressure data is transmitted to the pressure sensor group in the sensor box (402) through the liquid pipe (49). The control system calculates the three-dimensional deformation of the sheet metal part based on multiple pressure differences. S4. Based on the deformation data, the control system simultaneously performs two operations: (a) Drive the welding head (12) to perform adaptive path planning along the weld seam trajectory; (b) The spatial posture of the sheet metal parts is adjusted by adjusting the degree of freedom displacement mechanism of the head (23) so that the two welding surfaces maintain the alignment accuracy required by the welding process in real time. S5. After welding is completed, the electromagnet (38) extends and tightens the control plate rope (37), which drives the measuring longitudinal plate (31) and the measuring transverse plate (32) to overcome the elastic force of the push-flat spring (34) and reset to the storage state. At the same time, the liquid storage bladder (48) achieves deformation reset through the pressure-bearing air ring (401) to prepare for the next welding cycle.

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