Welding and positioning tool for tread cleaning air supply unit

Abstract

The invention belongs to the technical field of air supply unit welding, and particularly relates to a tread sweeping air supply unit welding and positioning tool which comprises a workbench and a first door-shaped frame, the first door-shaped frame is fixedly installed at the top of the workbench, an air supply unit body is arranged in the first door-shaped frame, and the air supply unit body is composed of a U-shaped plate, a first side plate and a second side plate. The first side plate and the second side plate are respectively arranged at the bottom and the top of the U-shaped plate; elastic plates are arranged on the three inner walls of the first door-shaped frame, the three elastic plates can be close to or away from one another and are used for positioning the U-shaped plate, and a fixing plate and an elastic pad are arranged on the left side and the right side of the upper portion of the first side plate correspondingly; the bending deformation condition of the side plates is detected through the detection springs, the corresponding supporting assemblies are controlled to reciprocate in the bending deformation area, bending deformation of the side plates is corrected and eliminated, the surface flatness of the side plates is effectively guaranteed, and the welding quality of the air supply unit body is remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding of air supply units, and specifically relates to a welding positioning tooling for a tread cleaning air supply unit. Background Art

[0002] During the long-term operation of a locomotive, the tread of the wheel is extremely vulnerable to interference by complex environmental factors. By setting up a tread cleaning air supply unit, the contaminated wheel tread can be cleaned to restore the adhesion coefficient of the tread and ensure the stability and safety of the locomotive operation.

[0003] The tread cleaning air supply unit needs to maintain stable working performance under long-term high-load working conditions, which mainly depends on the integrity and reliability of its structure. The box body of the tread cleaning air supply unit is usually formed by welding a U-shaped plate and two side plates. Therefore, during the welding process of manufacturing the box body of the tread cleaning air supply unit, the welding quality has a direct impact on the connection strength and sealing performance of the box body.

[0004] When welding the U-shaped plate and the side plates, the high heat generated will cause uneven heating of the side plates, resulting in angular deformation of the side plates towards the weld side, causing deviation in the spatial position of the side plates and affecting the structural accuracy and dimensional stability of the entire box body.

[0005] In addition, during the welding process of workpieces, rigid mechanical constraints are often used to suppress welding thermal deformation. However, while suppressing the thermal deformation of the workpiece, rigid constraints will cause significant constrained thermal stress to be generated inside the workpiece, requiring the workpiece material to have sufficient strength to resist this stress. Therefore, relatively high requirements are imposed on the material type and strength of the workpiece. For metal materials such as copper, aluminum, and their alloys with relatively large thermal expansion coefficients and low yield strengths, it is difficult for them to withstand the constrained thermal stress caused by rigid constraints, and the workpiece is prone to irreversible plastic deformation or cracking, seriously affecting the welding accuracy and production continuity of the workpiece.

[0006] Therefore, it is necessary to solve the above problems through a welding positioning tooling for a tread cleaning air supply unit. Summary of the Invention

[0007] In view of the above problems, the present invention provides a welding positioning tooling for a tread cleaning air supply unit to solve the problems raised in the above background art.

[0008] To achieve the above object, the present invention provides the following technical solution: A welding positioning tooling for a tread cleaning air supply unit, including a workbench and a first gantry. The first gantry is fixedly installed on the top of the workbench, and a main body of the air supply unit is arranged inside the first gantry. The main body of the air supply unit is composed of a U-shaped plate, a first side plate, and a second side plate. The first side plate and the second side plate are respectively arranged at the bottom and the top of the U-shaped plate; Elastic plates are provided on the three inner walls of the first portal frame, and the three elastic plates can approach or move away from each other to position the U-shaped plate. On the upper left and right sides of the first side plate, a fixing plate and an elastic pad are respectively provided. The elastic pad is arranged at the bottom of the fixing plate. A detection spring is fixedly connected between the fixing plate and the elastic pad. The fixing plate can move up and down and left and right relative to the first side plate, driving the detection spring and the elastic pad to move synchronously, for clamping the first side plate and detecting the deformation of the first side plate by the change in the compression amount of the detection spring. A support plate and a movable rod are provided below the first side plate. The movable rod is hinged at the bottom of the support plate and can push the support plate to rotate relative to the first side plate according to the change in the compression amount of the detection spring, and the movable rod can change the support angle of the support plate to the first side plate.

[0009] Preferably, a connecting seat is fixedly installed on the side of the elastic plate close to the first portal frame, and a telescopic cylinder is installed on the side of the connecting seat away from the elastic plate. The telescopic cylinder is fixed to the inner wall of the first portal frame. A back plate is fixedly installed in the middle of the first portal frame.

[0010] Preferably, a second portal frame is fixedly installed on the top of the workbench close to one side of the first portal frame. A second cylinder is installed on the top of the second portal frame. The output end of the second cylinder is fixedly connected with a slide rail, and slide seats are slidably assembled on both sides of the slide rail.

[0011] Preferably, an electric push rod is fixedly connected to the top of the fixing plate, and the top of the electric push rod is fixed to the slide seat.

[0012] Preferably, a plurality of guide rails are fixedly installed on the top of the workbench. A base is slidably assembled on the guide rails. A first cylinder is fixedly installed on the top of the base. A hinge shaft is arranged at the top of the output end of the first cylinder. The first cylinder is hinged to the support plate through the hinge shaft.

[0013] Preferably, the number of the guide rails is four. The four guide rails are arranged in a rectangular array along the length direction of the first side plate, and the adjacent two guide rails along the length direction of the first side plate are in contact with each other.

[0014] Preferably, guide rods are symmetrically hinged to the left and right sides of the middle part of the output end of the first cylinder, and the movable rod is slidably assembled in the inner cavity of the guide rods.

[0015] Preferably, a permanent magnet block is fixedly connected to the end of the movable rod located in the inner cavity of the guide rod. An electromagnetic block is fixedly connected to the bottom of the inner cavity of the guide rod. The opposite end faces of the permanent magnet block and the electromagnetic block have the same magnetism, and a return spring is fixedly connected between the opposite end faces of the permanent magnet block and the electromagnetic block.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows: 1. The present invention detects the angular deformation of the spring monitoring side plate during the welding process, controls the cooperation of corresponding electromagnetic blocks, permanent magnetic blocks, movable rods and other components, applies a reaction force to the support plate, effectively inhibits the angular deformation of the side plate, ensures the welding positioning accuracy of the side plate, and effectively reduces the welding defects caused by angular deformation.

[0017] 2. The present invention detects the bending deformation of the side plate through the detection spring, controls the corresponding support assembly to reciprocate in the bending deformation area, corrects and eliminates the bending deformation of the side plate, effectively guarantees the surface flatness of the side plate, and significantly improves the welding quality of the air supply unit body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of the welding positioning tooling for the tread cleaning air supply unit of the present invention; Figure 2 is the overall structural schematic diagram of the welding positioning tooling for the tread cleaning air supply unit of the present invention from another perspective; Figure 3 is Figure 2 the enlarged schematic diagram of part A structure in Figure 4 is the structural schematic diagram of the carrier assembly and the positioning mechanism of the present invention; Figure 5 is Figure 4 the enlarged schematic diagram of part B structure in Figure 6 is the structural schematic diagram of the support assembly of the present invention; Figure 7 is the structural schematic diagram of the air supply unit body of the present invention; Figure 8 is the structural schematic diagram of the displacement mechanism and the clamping assembly of the present invention; Figure 9 is Figure 8 the enlarged schematic diagram of part C structure in Figure 10 is the structural schematic diagram of the angular deformation of the first side plate of the present invention.

[0019] Reference numerals: 10. Carrier assembly; 11. Workbench; 12. First portal frame; 121. Back plate; 13. Second portal frame; 20. Positioning mechanism; 21. Telescopic cylinder; 22. Connecting seat; 23. Elastic plate; 30. Support assembly; 31. Guide rail; 32. Base; 33. First cylinder; 34. Support plate; 35. Guide rod; 351. Movable rod; 352. Permanent magnet block; 353. Electromagnetic block; 354. Return spring; 40. Displacement mechanism; 41. Second cylinder; 42. Slide rail; 43. Slide block; 50. Clamping assembly; 51. Electric push rod; 52. Fixed plate; 53. Elastic pad; 60. Air supply unit body; 61. U-shaped plate; 62. First side plate; 63. Second side plate. Detailed implementation mode

[0020] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0021] Embodiment 1: As Figures 1-10 shown, a welding positioning tool for a tread cleaning air supply unit includes a carrier assembly 10, a positioning mechanism 20, a support assembly 30, a displacement mechanism 40, a clamping assembly 50, and an air supply unit body 60. A plurality of positioning mechanisms 20 are arranged on the carrier assembly 10 for positioning the air supply unit body 60. The support assembly 30 is arranged on the carrier assembly 10 to provide stable support for the air supply unit body 60 and generate a reaction force to effectively inhibit the deformation of the air supply unit body 60. The displacement mechanism 40 is arranged on the carrier assembly 10 for controlling the clamping assembly 50 to approach and move away from the air supply unit body 60. The clamping assembly 50 is arranged on the displacement mechanism 40 to detect the deformation of the air supply unit body 60 and position and clamp the air supply unit body 60.

[0022] Referring to Figure 2 and Figure 7 , the air supply unit body 60 includes a U-shaped plate 61, a first side plate 62, and a second side plate 63. The left end face, right end face, and upper end face of the U-shaped plate 61 are all in contact with the positioning mechanism 20. The first side plate 62 and the second side plate 63 are respectively arranged at the bottom and top of the U-shaped plate 61, and the upper end face of the first side plate 62 is in contact with the clamping assembly 50, and the lower end face of the first side plate 62 is in contact with the support assembly 30. During the welding operation, first use the clamping assembly 50 and the support assembly 30 to clamp the first side plate 62, and at the same time use the positioning mechanism 20 to clamp the U-shaped plate 61. After completing the welding between the two, remove the U-shaped plate 61. Then, use the clamping assembly 50 and the support assembly 30 to clamp the second side plate 63, and flip and re-clamp the U-shaped plate 61 for the welding operation of the second side plate 63.

[0023] Reference Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , the carrier assembly 10 includes a workbench 11, a first gantry 12 and a second gantry 13. The first gantry 12 is fixedly installed on the top of the workbench 11 for the installation of the positioning mechanism 20. A back plate 121 is fixedly installed in the middle of the first gantry 12 to limit the backward displacement of the U-shaped plate 61. The second gantry 13 is fixed to the workbench 11 on the side close to the first gantry 12 for the installation of the displacement mechanism 40.

[0024] Specifically, the number of the positioning mechanisms 20 is three groups, which are respectively arranged on the three inner walls of the first gantry 12. The positioning mechanism 20 includes a telescopic cylinder 21, a connecting seat 22 and an elastic plate 23. The telescopic cylinder 21 is fixed to the inner wall of the first gantry 12. The connecting seat 22 is fixedly installed on the output end of the telescopic cylinder 21. The elastic plate 23 is fixedly installed at the end of the connecting seat 22 away from the telescopic cylinder 21. During use, the output end of the telescopic cylinder 21 extends, driving the connecting seat 22 and the elastic plate 23 to move towards the U-shaped plate 61. After the elastic plate 23 abuts against the U-shaped plate 61, the elastic characteristics of the elastic plate 23 are used to flexibly clamp the U-shaped plate 61, avoiding damage to the surface of the U-shaped plate 61 during the clamping process.

[0025] Reference Figure 2 、 Figure 3 、 Figure 6 and Figure 10 , the number of the support assemblies 30 is four. The four support assemblies 30 are fixedly installed on the top of the workbench 11 in a rectangular array. The four support assemblies 30 respectively correspond to the four support points of the supported first side plate 62 and second side plate 63, forming a stable four-point support structure.

[0026] Specifically, the support assembly 30 includes guide rails 31, a base 32, a first cylinder 33, a support plate 34, and guide rods 35. There are four guide rails 31, and the four guide rails 31 are fixedly installed on the top of the workbench 11 in a rectangular array along the length direction of the first side plate 62, which can provide a moving path for the support assembly 30, and the adjacent two guide rails 31 along the length direction of the first side plate 62 are in contact with each other, facilitating the support assembly 30 to support different positions at the bottom of the first side plate 62. The base 32 is slidably assembled on the guide rails 31, and the bottom of the first cylinder 33 is fixed to the base 32, so that when the base 32 moves along the guide rails 31, it can drive the support assembly 30 to move synchronously. The top of the output end of the first cylinder 33 is provided with a hinge shaft, and the support plate 34 is hinged to the output end of the first cylinder 33 through the hinge shaft, enabling the support plate 34 to rotate around the hinge shaft, thereby adjusting the support angle of the support plate 34. The top of the support plate 34 is in contact with the first side plate 62. During use, the base 32 can drive the first cylinder 33 to reciprocate along the guide rails 31, and then drive the support plate 34 to reciprocate along the bottom length direction of the first side plate 62, realizing the dynamic support of the support plate 34 at different positions of the first side plate 62.

[0027] Each group of support assemblies 30 has two guide rods 35. The guide rods 35 are symmetrically hinged and installed on both sides of the output end of the first cylinder 33. An active rod 351 is slidably connected inside the guide rod 35. The active rod 351 is adapted to the inner cavity of the guide rod 35, enabling the active rod 351 to slide along the inner cavity of the guide rod 35. The end of the active rod 351 away from the guide rod 35 is hinged to the bottom of the support plate 34. A stable triangular support structure is formed by enclosing between the two guide rods 35 and the support plate 34, thereby enhancing the structural reliability of the support assembly 30. A permanent magnet block 352 is fixedly connected to the end of the active rod 351 located inside the inner cavity of the guide rod 35, and an electromagnetic block 353 is fixedly connected to the bottom of the inner cavity of the guide rod 35. The opposite end faces of the permanent magnet block 352 and the electromagnetic block 353 have the same magnetic polarity, and a return spring 354 is fixedly connected between the opposite end faces of the permanent magnet block 352 and the electromagnetic block 353.

[0028] When the two electromagnetic blocks 353 are not energized, the two return springs 354 are in a relaxed state, and the support plate 34 remains horizontal; when one of the electromagnetic blocks 353 is energized, a magnetic repulsive force will be generated on the permanent magnet block 352 on the same side, causing the return spring 354 to be stretched, and at the same time pushing the active rod 351 to slide along the inner cavity of the guide rod 35 in a direction away from the electromagnetic block 353. The sliding of the active rod 351 drives the support plate 34 to rotate around the hinge shaft, making the support plate 34 change from a horizontal state to an inclined state. At the same time, the other return spring 354 is compressed, that is, the deformation amounts of the two return springs 354 are the same but in opposite directions. The symmetrical design of the two return springs 354, the guide rods 35, and the active rod 351 can ensure the smoothness of the support plate 34 during the inclination adjustment process.

[0029] Reference Figure 1 and Figure 8 , the displacement mechanism 40 includes a second cylinder 41, a slide rail 42 and a slide block 43. The second cylinder 41 is fixedly installed on the top of the second gantry 13. The slide rail 42 is fixedly connected to the output end of the second cylinder 41. The slide block 43 is slidably assembled on both sides of the slide rail 42. When the output end of the second cylinder 41 extends, it prompts the slide rail 42 to move towards the U-shaped plate 61, thereby driving the slide block 43 to be located above the first side plate 62.

[0030] Reference Figure 8 and Figure 9 , the clamping assembly 50 includes an electric push rod 51, a fixing plate 52 and an elastic pad 53. The electric push rod 51 is fixedly installed at the bottom of the slide block 43, so that when the slide block 43 moves along the slide rail 42, it can drive the clamping assembly 50 to move synchronously. The fixing plate 52 is fixedly connected to the output end of the electric push rod 51. The fixing plate 52 moves up and down by the telescopic movement of the output end of the electric push rod 51. A plurality of detection springs (not marked in the figure) are fixedly connected to the bottom of the fixing plate 52. One end of the plurality of detection springs away from the fixing plate 52 is fixed to the elastic pad 53. The elastic pad 53 is used to flexibly clamp the first side plate 62. When clamping and positioning the first side plate 62, the elastic pad 53 abuts against the first side plate 62, and the detection spring is in a compressed state, so as to provide the required clamping force. Compared with rigid mechanical constraints, flexible clamping can avoid significant constraint thermal stress generated inside the workpiece, thereby preventing the first side plate 62 from being damaged due to constraint thermal stress; and when the first side plate 62 undergoes angular deformation, the detection springs of the two clamping assemblies 50 are unevenly stressed, resulting in corresponding changes in the deformation of the detection springs, which are used to detect the angular deformation of the first side plate 62.

[0031] Working principle: First, the first side plate 62 is clamped and positioned. Control the output ends of the first cylinders 33 of the four support assemblies 30 to extend a preset length, so that the support plates 34 form a stable four-point support plane, and place the first side plate 62 to be welded on the support plates 34. Then control the second cylinder 41 to drive the slide rail 42 to move towards the U-shaped plate 61, so that the clamping assembly 50 is positioned above the first side plate 62, realizing the position calibration of the clamping assembly 50 in the width direction of the first side plate 62. Drive the clamping assembly 50 to move to both ends of the slide rail 42 through the slide block 43 respectively, realizing the position calibration of the clamping assembly 50 in the length direction of the first side plate 62. Start the electric push rod 51, drive the fixing plate 52 and the elastic pad 53 to move downward. When the elastic pad 53 abuts against the top surface of the first side plate 62, continue to apply pressure until the compression amount of the detection spring reaches the preset value, and generate a continuous clamping force through the elastic deformation of the detection spring to further strengthen the positioning constraint on the first side plate 62.

[0032] Then, the U-shaped plate 61 is clamped and positioned. After the operator pre-aligns the U-shaped plate 61 with the first side plate 62, the output ends of the telescopic cylinders 21 of the three groups of positioning mechanisms 20 are controlled to extend, so that the connecting seat 22 drives the elastic plate 23 to move towards the U-shaped plate 61. After the elastic plate 23 contacts the U-shaped plate 61, the elastic plate 23 is used to flexibly clamp the U-shaped plate 61 with different sizes, realizing effective positioning and constraint of the U-shaped plate 61.

[0033] Next, single-sided weld welding and angular deformation suppression. Refer to Figure 10 , taking the welding of the left weld as an example, during the welding of the left weld of the first side plate 62, the high temperature generated by the welding heat source will cause the first side plate 62 to undergo angular deformation towards the weld side, causing the first side plate 62 to disengage from the left two groups of support components 30 and squeeze the right two groups of support components 30. As a result, the support plates 34 of the right two groups of support components 30 rotate clockwise around the hinge axis, and the deformation amounts of the two reset springs 354 on both sides of the right two groups of support components 30 are the same but in opposite directions. The support plates 34 of the right two groups of support components 30 change from a horizontal state to an inclined state. At the same time, the angular deformation of the first side plate 62 causes the compression amount of the detection spring of the left clamping component 50 to continuously increase, and the compression amount of the detection spring of the right clamping component 50 to decrease. Therefore, the angular deformation of the first side plate 62 can be monitored in real time by detecting the change in the compression amount of the spring, and the angular deformation of the first side plate 62 can be suppressed by using the support component 30. Specifically: when the compression amount of the detection spring of the left clamping component 50 increases and the compression amount of the detection spring of the right clamping component 50 decreases, it indicates that the first side plate 62 has undergone angular deformation. At this time, the right electromagnetic block 353 of the right two groups of support components 30 is controlled to be energized to generate a magnetic repulsive force, which pushes the permanent magnet block 352 to drive the movable rod 351 to slide, prompting the two reset springs 354 on both sides of the right two groups of support components 30 to return to the relaxed state, and the support plate 34 returns from the inclined state to the horizontal state, thereby applying a reaction force to the angular deformation of the first side plate 62, effectively suppressing the angular deformation of the first side plate 62, and making the first side plate 62 return to the horizontal state. The first side plate 62 abuts against the four support plates 34 again. After the welding of the left weld is completed, the compression amounts of the detection springs of the two clamping components 50 on both sides return to the preset value, thus ensuring the welding positioning accuracy of the first side plate 62 during the welding process.

[0034] It should be noted that before welding, the U-shaped plate 61 and the first side plate 62 are in contact with each other, and the U-shaped plate 61 cannot restrain the angular deformation of the first side plate 62.

[0035] Subsequently, the remaining welds are welded in conjunction with the restraint. After the left weld is completed, the rigid connection formed in the welding area exerts a restraint on the first side plate 62. When welding the right and rear welds, the solidified left weld acts as a rigid fulcrum, cooperating with the clamping force of the support assembly 30 and the displacement mechanism 40 to construct a multi-fulcrum restraint system. At this time, the stiffness of the first side plate 62 is significantly improved, and the angular deformation caused by the high temperature during the welding of the remaining welds is effectively weakened. The welding accuracy can be maintained without additional active adjustment, achieving the continuity and stability of the welding process.

[0036] Finally, it is flipped and positioned for welding with the second side plate 63. After the welding of the first side plate 62 is completed, the U-shaped plate 61 is removed and flipped by 180°, and the second side plate 63 to be welded is placed on the support assembly 30. The above positioning, clamping and welding processes are repeated, and finally the high-precision welding and forming of the air supply unit body 60 are realized, significantly improving the welding quality.

[0037] Embodiment 2: Based on the technical solution of the above Embodiment 1, during the process of the support assembly 30 suppressing the angular deformation of the first side plate 62, the support plate 34 outputs a reaction force by actively adjusting the support angle to offset the angular deformation caused by welding. However, since the thickness of the first side plate 62 is usually relatively thin, it may cause local downward bending deformation of the first side plate 62. This local downward bending deformation will reduce the surface flatness of the first side plate 62 and seriously affect the welding quality.

[0038] To solve the above problems, after the process of "single-side weld welding and angular deformation suppression" of the first side plate 62 is completed, the detection spring and the support plate 34 work together to detect and eliminate the local bending deformation. Specifically: First, the bending deformation area is detected. The slide seats 43 on both sides of the slide rail 42 are controlled to slide towards each other, driving the clamping assembly 50 to move along the top length direction of the first side plate 62. During this process, the detection spring continuously senses the change in the contact pressure. Since the bending deformation direction is downward, when passing through the bending deformation area, the detection spring is less stressed and elongates, and its compression amount decreases accordingly, so as to achieve the accurate positioning and fixed-point detection of the bending deformation area.

[0039] Then, the bending deformation is eliminated. Taking the occurrence of local bending deformation on the left side of the first side plate 62 as an example, control the left clamping assembly 50 to stay above the bending deformation area, and then drive the two groups of left support assemblies 30 to slide along the guide rail 31 to the bending deformation area. At this time, the support plate 34 applies an upward support force to the bent part, and control the support plate 34 to reciprocate in the bending deformation area. Through continuous pressure action and dynamic adjustment, the bending deformation of the first side plate 62 is corrected and eliminated. When the compression amount of the detection spring returns to the preset value, it indicates that the bending deformation of the first side plate 62 has been effectively eliminated, effectively ensuring the surface flatness of the first side plate 62 and significantly improving the welding quality of the air supply unit body 60.

[0040] Next, the process connection. After confirming that the bending deformation is eliminated, control the clamping assembly 50 and the support assembly 30 to return to the initial position, and prepare for subsequent processes such as "welding of the remaining welds and the synergistic effect of restraint" and "flipping and positioning and welding of the second side plate 63", and complete all welding work of the air supply unit body 60.

[0041] Embodiment 3: Using a welding positioning tooling for a tread cleaning air supply unit as described in Embodiment 1 and Embodiment 2, this embodiment specifically discloses a welding method, including the following steps: Step 1: Clamp and position the first side plate 62 by using the support assembly 30 and the clamping assembly 50, and clamp and position the U-shaped plate 61 by using the positioning mechanism 20 to achieve the positioning and restraint of the air supply unit body 60. Step 2: Weld one of the short side welds of the first side plate 62, and monitor the angular deformation of the first side plate 62 through the detection spring. When the first side plate 62 undergoes angular deformation, control the corresponding electromagnet 353 to be energized to prompt the support plate 34 to apply a reaction force to the angular deformation of the first side plate 62. Step 3: Control the sliding seats 43 on both sides of the sliding rail 42 to slide towards each other, and detect the bending deformation of the first side plate 62 through the detection spring. When the first side plate 62 undergoes bending deformation, control the corresponding support assembly 30 to reciprocate in the bending deformation area until the compression amount of the detection spring returns to the preset value, and then control the clamping assembly 50 and the support assembly 30 to return to the initial position. Step 4: Weld the remaining welds between the first side plate 62 and the U-shaped plate 61 to complete the welding of the first side plate 62.

[0042] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0043] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding positioning tooling for a tread cleaning air supply unit, comprising a workbench (11) and a first gantry (12), the first gantry (12) being fixedly installed on the top of the workbench (11), and characterized in that: Inside the first gantry (12), there is an air supply unit body (60), which is composed of a U-shaped plate (61), a first side plate (62) and a second side plate (63). The first side plate (62) and the second side plate (63) are respectively arranged at the bottom and top of the U-shaped plate (61). Elastic plates (23) are arranged on the three inner walls of the first gantry (12), and the three elastic plates (23) can approach or move away from each other to position the U-shaped plate (61). On the upper left and right sides of the first side plate (62), a fixing plate (52) and an elastic pad (53) are respectively arranged. The elastic pad (53) is arranged at the bottom of the fixing plate (52). A detection spring is fixedly connected between the fixing plate (52) and the elastic pad (53). The fixing plate (52) can move up and down and left and right relative to the first side plate (62), driving the detection spring and the elastic pad (53) to move synchronously, for clamping the first side plate (62) and detecting the deformation of the first side plate (62) by the change of the compression amount of the detection spring. Below the first side plate (62), there is a support plate (34) and a movable rod (351). The movable rod (351) is hinged at the bottom of the support plate (34) and can push the support plate (34) to rotate relative to the first side plate (62) according to the change of the compression amount of the detection spring. The movable rod (351) can change the support angle of the support plate (34) for the first side plate (62).

2. The welding positioning tooling for the tread cleaning air supply unit according to claim 1, wherein: On the side of the elastic plate (23) close to the first gantry (12), a connecting seat (22) is fixedly installed. On the side of the connecting seat (22) away from the elastic plate (23), a telescopic cylinder (21) is installed, and the telescopic cylinder (21) is fixed to the inner wall of the first gantry (12). In the middle of the first gantry (12), a back plate (121) is fixedly installed.

3. The welding positioning tooling for the tread cleaning air supply unit according to claim 1, wherein: On the top of the workbench (11) close to one side of the first gantry (12), a second gantry (13) is fixedly installed. On the top of the second gantry (13), a second cylinder (41) is installed. The output end of the second cylinder (41) is fixedly connected with a slide rail (42), and slide seats (43) are slidably assembled on both sides of the slide rail (42).

4. The welding positioning tooling for the tread cleaning air supply unit according to claim 3, wherein: On the top of the fixing plate (52), an electric push rod (51) is fixedly connected, and the top of the electric push rod (51) is fixed to the slide seat (43).

5. The welding positioning tooling for the tread cleaning air supply unit according to claim 1, characterized in that: On the top of the workbench (11), a plurality of guide rails (31) are fixedly installed. A base (32) is slidably assembled on the guide rails (31). On the top of the base (32), a first cylinder (33) is fixedly installed. At the top of the output end of the first cylinder (33), there is a hinge shaft, and the first cylinder (33) is hinged to the support plate (34) through the hinge shaft.

6. The welding positioning tooling for the tread cleaning air supply unit according to claim 5, characterized in that: The number of the guide rails (31) is four, and the four guide rails (31) are arranged in a rectangular array along the length direction of the first side plate (62), and the adjacent two guide rails (31) along the length direction of the first side plate (62) are in contact with each other.

7. The tread cleaning air supply unit welding positioning tooling according to claim 5, characterized in that: On the left and right sides of the middle part of the output end of the first cylinder (33), guide rods (35) are symmetrically hinged. The movable rod (351) is slidably assembled in the inner cavity of the guide rod (35).

8. The welding positioning tooling for the tread cleaning air supply unit according to claim 7, characterized in that: A permanent magnet block (352) is fixedly connected to the end of the movable rod (351) located in the inner cavity of the guide rod (35). An electromagnetic block (353) is fixedly connected to the bottom of the inner cavity of the guide rod (35). The opposite end faces of the permanent magnet block (352) and the electromagnetic block (353) have the same magnetic property, and a return spring (354) is fixedly connected between the opposite end faces of the permanent magnet block (352) and the electromagnetic block (353).

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