A distribution box body welding tool

Abstract

This invention relates to the field of welding equipment technology and discloses a welding fixture for a distribution box, including a machine tool, an assembly base mounted on the machine tool, and a welding torch mounted on the assembly base. A horizontally positioned heat-conducting plate is provided at the bottom of the welding torch, with a circular hole at its center. The heat-conducting plate is fitted onto the welding torch through the circular hole. This invention can cool the welded surface after welding the distribution box studs using the heat-conducting plate and airflow heat exchange components, reducing deformation such as bulging and warping of the sheet metal caused by heat accumulation, thus improving the processing quality of the distribution box. Simultaneously, the chuck and clamp drive can pull the studs to inspect their welding quality. This method is more efficient than waiting for natural cooling followed by secondary inspection, reducing inspection errors caused by multiple steps. Furthermore, active cooling eliminates temperature differences at the weld points, avoiding false changes in stud fastening force due to thermal expansion, and ensuring the accuracy of monitoring data.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a welding fixture for a distribution box body. Background Technology

[0002] Welding of the distribution box enclosure is a crucial step in its production. This mainly includes welding the sheet metal of the enclosure, welding the internal supports and partitions, welding the door hinges, and welding the internal studs and bolts. For the stud welding, a specialized stud welding machine is typically used. Combining this machine with a multi-axis machine tool enables precise, continuous, and automated stud welding.

[0003] However, existing stud welding fixtures for distribution boxes have certain shortcomings during welding: In some distribution boxes, the studs are densely distributed inside, and the sheet metal is thin, leading to severe heat accumulation during continuous welding. This can easily cause bulging, warping, and deformation of the sheet metal, resulting in reduced distribution box quality. Current technology generally uses compressed gas for cooling, but the heat-affected zones between studs overlap, causing heat to accumulate inside the sheet metal. Gas convection only cools the surface of the sheet metal, and blowing gas during welding can cause the molten pool to cool too quickly, resulting in defects such as porosity and cracks in the weld. Secondly, the welding quality of studs varies. Current technology typically monitors quality after welding using a tensile testing machine. This method involves many steps, a long cycle, and low efficiency. For example, manual clamping steps can introduce operational errors and interfere with the test results. Furthermore, it cannot achieve full inspection, only random sampling, resulting in a high rate of missed inspections. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a welding fixture for distribution box bodies, which has advantages such as reducing deformation during distribution box welding, improving the production quality of distribution boxes, and enabling online monitoring of welding quality. It solves the problems of deformation caused by heat accumulation during stud welding in existing distribution boxes, as well as the long working cycle and low efficiency of stud welding quality inspection.

[0005] To solve the above technical problems, the present invention provides the following technical solution: a welding fixture for a distribution box, comprising a machine tool, an assembly base mounted on the machine tool, and a welding torch mounted on the assembly base. The bottom end of the welding torch is provided with a horizontally arranged heat-conducting plate, and the center of the heat-conducting plate is provided with a circular hole. The heat-conducting plate is sleeved on the welding torch through the circular hole. An airflow cavity is provided inside the heat-conducting plate. An airflow heat exchange component for cooling the heat-conducting plate is installed on the assembly base. An assembly frame is fixed above the heat-conducting plate. A chuck clamp and a clamp drive are installed inside the assembly frame. The chuck clamp is used to clamp the welded studs. The chuck clamp includes multiple circumferentially distributed jaws. The clamp drive is used to drive the chuck clamp to move vertically. The clamp drive includes a vertical pressure sensor connected to the bottom of the chuck clamp. A cylinder for driving the assembly frame to move along the welding torch axis is also fixed on the welding torch. The chuck fixture is equipped with a marking component, which is used to mark defective studs.

[0006] Preferably, an air inlet pipe and an air outlet pipe are fixedly connected above the heat-conducting plate. The air inlet pipe and the air outlet pipe are respectively connected to both ends of the airflow cavity. The airflow heat exchange assembly includes a housing and an air pump fixed on the mounting base. A semiconductor cooling chip is fixedly embedded in the side wall of the housing. An outer heat dissipation fin is fixed on the outside of the semiconductor cooling chip. A cooling fan is fixed on the outer heat dissipation fin. An inner heat dissipation fin is fixed on the inside of the semiconductor cooling chip. One end of the air inlet pipe is fixedly connected to the side wall of the housing. The side of the housing away from the air inlet pipe is fixedly connected to the output end of the air pump.

[0007] Preferably, the chuck clamp includes an upper annular plate sleeved on the welding torch. The surface of the upper annular plate has multiple radially arranged grooves in an annular array. A strip-shaped hole with the same direction as the radial groove is formed in the groove. A strip-shaped slider is slidably connected inside the groove. The gripper is fixedly installed on the top of the strip-shaped slider. A concentric gear is rotatably connected to the bottom of the upper annular plate. Multiple arc-shaped holes in an annular array are formed on the surface of the concentric gear. A pin is fixed to the bottom of the strip-shaped slider. The bottom end of the pin passes through the strip-shaped hole and the arc-shaped hole in sequence. A drive motor is fixed to the upper annular plate. A drive gear is fixed to the output end of the drive motor. The drive gear meshes with the concentric gear.

[0008] Preferably, the gripper includes a fixed base fixed on a strip slider, and a plurality of lateral pressure sensors are fixed on the fixed base facing the welding gun side. The plurality of lateral pressure sensors are evenly distributed in the vertical direction. A clamping block is provided on the fixed base near the welding gun side, and the clamping block is fixedly connected to the plurality of lateral pressure sensors.

[0009] Preferably, the clamping drive is configured in two sets and symmetrically distributed on both sides of the chuck clamp. The clamping drive includes a vertical motor, and a screw is fixed at the output end of the vertical motor. The axis of the screw is consistent with the axis of the welding torch. Two bearing seats are installed on the screw, and both bearing seats are fixed to the assembly frame. A nut seat is also threadedly connected to the screw. The nut seat is slidably connected to the assembly frame, and the sliding direction is consistent with the axis of the screw. The vertical pressure sensor is fixed on the top of the nut seat. The top of the vertical pressure sensor is fixedly connected to the bottom of the upper annular plate. When the vertical motor is running, it forces the screw to rotate, thereby driving the nut seat and the vertical pressure sensor (81) to move along the axis of the welding torch.

[0010] Preferably, the marking assembly includes a main rack, a secondary rack, and a transmission gear. The main rack is fixed to the edge of the fixing seat. The top of the upper annular plate is also provided with a secondary rack and a transmission gear. The transmission gear is rotatably connected to the top surface of the upper annular plate. The transmission gear meshes with both the main rack and the secondary rack. The secondary rack is radially slidably connected to the top surface of the upper annular plate. A marking pen is fixed to the top of the secondary rack.

[0011] Preferably, an isolation sleeve is fitted on the outside of the heat-conducting plate, a base block is fixed to the top edge of the isolation sleeve, a return spring is fixed to the bottom of the base block, and the return spring is fixedly connected to the top surface of the heat-conducting plate.

[0012] Preferably, the bottom surface of the heat-conducting plate is provided with a downwardly oriented air outlet, the air outlet is connected to the airflow cavity, and a solenoid valve is installed in the air outlet, and an on / off valve is provided on the air outlet pipe.

[0013] Preferably, an infrared temperature sensor is fixed to the side wall of the isolation sleeve, and the infrared temperature sensor is tilted and pointed directly below the welding torch.

[0014] Compared with the prior art, the present invention provides a welding fixture for a distribution box body, which has the following advantages: 1. This type of welding fixture for distribution box bodies, by setting up a heat-conducting plate, chuck clamp, clamp drive component, cylinder, and airflow heat exchange component, can cool the welding surface after welding the distribution box studs using the heat-conducting plate and airflow heat exchange component. This reduces deformation such as bulging and warping of the sheet metal caused by heat accumulation, improving the processing quality of the distribution box. At the same time, the chuck clamp and clamp drive component can also pull the studs to check the welding quality of the studs. Compared with the method of waiting for natural cooling and then conducting secondary inspection, this method is more efficient and reduces the inspection error caused by multiple steps. Furthermore, the active cooling eliminates the temperature difference at the welding point, avoiding false changes in the stud fastening force caused by thermal expansion, and ensuring the accuracy of the monitoring data.

[0015] 2. This type of distribution box welding fixture, by setting a chuck clamp, is conducive to clamping the welded studs, so as to inspect the quality of stud welding fastening in the subsequent process. In addition, by setting the jaws as clamping blocks and lateral pressure sensors, it is also possible to detect the tilt quality of the studs after welding, thus enriching the detection functions.

[0016] 3. This type of distribution box welding fixture, by setting a main rack, a secondary rack, a transmission gear and a marking pen, allows for marking on the problematic studs by activating the chuck and cylinder when welding quality problems are detected, thus facilitating subsequent rectification work.

[0017] 4. This type of distribution box welding fixture, by setting an isolation sleeve, isolates the welding point from all sides, and the heat-conducting plate isolates the area above the welding point, which can prevent the welding sparks from splashing outward, thereby preventing the sparks from damaging the equipment or injuring the staff. By setting an air outlet, solenoid valve and on / off valve, the airflow formed can be briefly discharged downward through the air outlet at the bottom of the heat-conducting plate, thereby blowing away the spark slag on the welding surface and preventing the heat conduction efficiency from decreasing after the heat-conducting plate is pressed on the spark slag. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the welding fixture for the distribution box body of the present invention; Figure 2 This is a schematic diagram of the welding torch of the present invention; Figure 3 This is an exploded view of the heat-conducting plate of the present invention; Figure 4 This is an exploded view of the airflow heat exchange component of the present invention; Figure 5 This is a schematic diagram of the structure of the clamp drive component of the present invention; Figure 6 This is a schematic diagram of the bottom structure of the chuck clamp of the present invention; Figure 7 This is a schematic diagram of the gripper structure of the present invention; Figure 8 This is a schematic diagram of the structure of the isolation sleeve of the present invention.

[0019] In the diagram: 1. Machine tool; 2. Assembly base; 3. Welding torch; 4. Heat-conducting plate; 41. Airflow cavity; 42. Inlet pipe; 43. Outlet pipe; 5. Airflow heat exchange assembly; 51. Housing; 52. Air pump; 53. Semiconductor cooling chip; 54. External heat dissipation fins; 55. Cooling fan; 56. Internal heat dissipation fins; 6. Assembly frame; 7. Chuck fixture; 71. Clamping jaw; 711. Fixing base; 712. Lateral pressure sensor; 713. Clamping block; 72. Radial groove; 73. Slotted hole; 7 4. Strip slider; 75. Concentric gear; 76. Arc hole; 77. Drive motor; 78. Drive gear; 79. Upper annular plate; 70. Pin; 8. Fixture drive component; 81. Vertical pressure sensor; 82. Screw; 83. Bearing seat; 84. Nut seat; 85. Vertical motor; 9. Cylinder; 10. Main rack; 11. Secondary rack; 12. Transmission gear; 13. Marking pen; 14. Isolation sleeve; 15. Return spring; 16. Vent; 17. Infrared temperature sensor. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a welding fixture for the distribution box body.

[0022] Example 1: Please refer to Figures 1-5 A welding fixture for a distribution box includes a machine tool 1, an assembly base 2 mounted on the machine tool 1, and a welding torch 3 mounted on the assembly base 2. The welding torch 3 has a horizontally arranged heat-conducting plate 4 at its bottom end, and a circular hole in the center of the heat-conducting plate 4. The heat-conducting plate 4 is sleeved on the welding torch 3 through the circular hole. An airflow cavity 41 is provided inside the heat-conducting plate 4. An airflow heat exchange component 5 for cooling the heat-conducting plate 4 is installed on the assembly base 2. An assembly frame 6 is fixed above the heat-conducting plate 4. A chuck clamp 7 and a clamp drive 8 are installed inside the assembly frame 6. The chuck clamp 7 is used to clamp the welded studs. The chuck clamp 7 includes multiple circumferentially distributed jaws 71. The clamp drive 8 is used to drive the chuck clamp 7 to move along the axis of the welding torch 3. The clamp drive 8 includes a vertical pressure sensor 81 connected to the bottom of the chuck clamp 7. A cylinder 9 for driving the assembly frame 6 to move along the axis of the welding torch 3 is also fixed on the welding torch 3. The chuck fixture 7 is provided with a marking component, which is used to mark defective studs.

[0023] The machine tool 1 is equipped with a horizontal platform, a positioning block installed on the horizontal platform, and multiple servo linear drive systems. The linear servo drive systems are used to drive the horizontal platform to move in the Y-axis direction and the mounting base 2 to move in the X-axis and Z-axis directions. The stud can be replaced with other metal parts of the distribution box such as nut sleeve. When the machine tool 1 is running, the welding gun 3 is controlled to move vertically to weld the stud held on the welding gun 3 to the distribution box. Finally, the welding gun 3 is controlled to move and detach from the stud, thereby realizing the welding of the stud. During use, before welding, the distribution box is placed on a horizontal platform and positioned using positioning blocks. Simultaneously, a robotic arm feeds the studs, installing them at the bottom of the welding torch. The machine tool controls the welding torch to move sequentially to each welding point on the distribution box according to pre-set drawings. After welding a single stud, the welding torch 3 moves upwards above the stud, and then the cylinder 9 is activated, causing the assembly frame 6, chuck clamp 7, clamp drive 8, and heat-conducting plate 4 to move downwards. This allows the heat-conducting plate 4 to fit over the outside of the stud and conform to the welding surface at the bottom of the stud, with the chuck clamp 7 also fitting over the outside of the stud. This forces the heat from the welding surface to transfer to the heat-conducting plate 4. At this point, the airflow heat exchange assembly 5 is activated, and the airflow... The heat-conducting component 5 cools the heat-conducting plate 4 by injecting cooling gas into the airflow cavity 41 inside the heat-conducting plate 4, further improving the cooling effect on the welding surface. Then, the chuck clamp 7 is activated. When the chuck clamp 7 is running, the jaws 71 move and clamp the welded stud. Then, the clamp drive 8 is activated, forcing the chuck clamp 7 holding the stud to move upward. Since the heat-conducting plate 4 is pressed against the welding surface at this time, it can play the role of pulling the stud upward. The welding tightness of the stud can be analyzed based on the data detected by the vertical pressure sensor 81. When the data is abnormal, it is determined that the stud does not meet the requirements. At this time, the chuck clamp 7 releases the clamp on the stud and marks the defective stud. By setting up a heat-conducting plate 4, a chuck clamp 7, a clamp drive component 8, a cylinder 9, and an airflow heat exchange component 5, the heat-conducting plate 4 and the airflow heat exchange component 5 can be used to cool the welding surface after welding the distribution box studs. This reduces deformation such as bulging and warping of the sheet metal caused by heat accumulation, improving the processing quality of the distribution box. At the same time, the chuck clamp 7 and the clamp drive component 8 can also pull the studs to detect the welding quality of the studs. This method is more efficient than waiting for natural cooling and then conducting a second inspection, reducing the detection errors caused by multiple steps. Furthermore, active cooling eliminates the temperature difference at the welding point, avoiding false changes in the stud fastening force caused by thermal expansion, and ensuring the accuracy of the monitoring data.

[0024] Example 2: See Figures 2-8Unlike the above embodiments, an air inlet pipe 42 and an air outlet pipe 43 are fixedly connected above the heat conduction plate 4. The air inlet pipe 42 and the air outlet pipe 43 are respectively connected to both ends of the airflow cavity 41. The airflow heat exchange assembly 5 includes a housing 51 and an air pump 52 fixed on the mounting base 2. A semiconductor cooling chip 53 is fixedly embedded in the side wall of the housing 51. An outer heat dissipation fin 54 is fixed on the outside of the semiconductor cooling chip 53. A cooling fan 55 is fixed on the outer heat dissipation fin 54. An inner heat dissipation fin 56 is fixed on the inside of the semiconductor cooling chip 53. One end of the air inlet pipe 42 is fixedly connected to the side wall of the housing 51. The side of the housing 51 away from the air inlet pipe 42 is fixedly connected to the output end of the air pump 52.

[0025] The heat-conducting plate 4 is made of copper, and the airflow cavity 41 is designed with a dense, tortuous linear shape, resulting in higher cooling efficiency. During use, the heat from the welding point is conducted to the heat-conducting plate 4, forcing the heat-conducting plate 4 to heat up. The semiconductor cooling chip 53 is powered on and operates, cooling the side closest to the inside of the housing 51, which in turn forces the internal heat dissipation fins 56 to cool down. At this time, the air pump 52 is activated, and the air pump 52 delivers gas to the housing 51, which is also cooled down. The cooled gas passes through the inlet pipe 42, the airflow cavity 41, and the outlet pipe 43 in sequence. Heat exchange is achieved when passing through the airflow cavity 41, cooling the heat-conducting plate 4. Finally, the heat of the welding part is transferred, forcing the welding part to cool down quickly, thereby preventing the distribution box from deforming due to heat.

[0026] Example 3, see Figures 2-8 Unlike the above embodiments, the chuck clamp 7 includes an upper annular plate 79 sleeved on the welding torch 3. The surface of the upper annular plate 79 has multiple radially arranged grooves 72 in annular arrays. Each radially arranged groove 72 has a strip-shaped hole 73 aligned with its direction. A strip-shaped slider 74 is slidably connected inside the radially arranged grooves 72. A gripper 71 is fixedly mounted on the top of the strip-shaped slider 74. A concentric gear 75 is rotatably connected to the bottom of the upper annular plate 79. The surface of the concentric gear 75 has multiple arc-shaped holes 76 arranged in annular arrays. A pin 70 is fixed to the bottom of the strip-shaped slider 74. The bottom end of the 70 has a strip-shaped hole 73 and an arc-shaped hole 76 passing through it in sequence. A drive motor 77 is fixed on the upper annular plate 79. A drive gear 78 is fixed at the output end of the drive motor 77. The drive gear 78 meshes with a concentric gear 75. The gripper 71 includes a fixed seat 711 fixed on the strip-shaped slider 74. Multiple lateral pressure sensors 712 are fixed on the side of the fixed seat 711 facing the welding torch 3. The multiple lateral pressure sensors 712 are evenly distributed in the vertical direction. A clamping block 713 is provided on the side of the fixed seat 711 near the welding torch 3. The clamping block 713 is fixedly connected to the multiple lateral pressure sensors 712.

[0027] The number of arc-shaped holes 76 and strip-shaped sliders 74 are matched and correspond one-to-one. The arc-shaped holes 76 are set to be arc-shaped, and the center of the arc does not coincide with the center of the concentric gear 75 along the axial direction. In use, starting the drive motor 77 can drive the drive gear 78 to rotate. When the drive gear 78 rotates, it drives the concentric gear 75 to rotate. When the concentric gear 75 rotates, it pushes multiple pins 70 through the arc-shaped holes 76. The pins 70 force the strip-shaped sliders 74 to slide along the radial grooves 72, thereby causing multiple jaws 71 to move synchronously and clamp the central stud. During the clamping process, the clamping force is reflected on the lateral pressure sensor 712 through the clamping block 713. If the stud tilts during welding, the lateral pressure sensor 712 on each jaw 71 can detect the obvious difference in pressure values, which can be used to detect the welding quality of the stud. By setting the chuck clamp 7, it is beneficial to clamp the welded studs so as to inspect the quality of stud welding fastening. In addition, by setting the jaws 71 as clamping blocks 713 and lateral pressure sensors 712, the tilt quality of the studs after welding can also be detected, making the detection function more comprehensive.

[0028] Example 4, see Figures 2-8 Unlike the above embodiments, the clamping drive unit 8 is configured as two sets and symmetrically distributed on both sides of the chuck clamp 7. The clamping drive unit 8 includes a vertical motor 85, and a screw 82 is fixed to the output end of the vertical motor 85. The axis of the screw 82 is consistent with the axis of the welding torch 3. Two bearing seats 83 are installed on the screw 82, and both bearing seats 83 are fixed to the assembly frame 6. A nut seat 84 is also threadedly connected to the screw 82. The nut seat 84 is slidably connected to the assembly frame 6, and the sliding direction is consistent with the axis of the screw 82. The vertical pressure sensor 81 is fixed to the top of the nut seat 84. The top of the vertical pressure sensor 81 is fixedly connected to the bottom of the upper annular plate 79. When the vertical motor 85 is running, it forces the screw 82 to rotate, thereby driving the nut seat 84 and the vertical pressure sensor 81 to move along the axis of the welding torch 3.

[0029] Among them, the two clamping drive components 8 have vertical motors 85 that operate synchronously. When the vertical motor 85 is started, it drives the screw 82 to rotate. When the screw 82 rotates, it drives the nut seat 84 to move vertically. When the nut seat 84 moves upward, it drives the vertical pressure sensor 81 to move upward. When the vertical pressure sensor 81 moves upward, it drives the upper annular plate 79 to move, forcing the entire chuck clamp 7 to move upward. This is beneficial for adjusting the initial position of the chuck clamp 7. Secondly, when the chuck clamp 7 has clamped the stud, starting the vertical motor 85 will apply an upward pulling force to the stud through the chuck clamp 7. With the help of the heat-conducting plate 4 held against the distribution box, quality inspection can be achieved.

[0030] Example 5, see Figures 2-8Unlike the above embodiments, the marking assembly includes a main rack 10, a secondary rack 11, and a transmission gear 12. The main rack 10 is fixed to the edge of the fixing base 711. The upper annular plate 79 is also provided with a secondary rack 11 and a transmission gear 12. The transmission gear 12 is rotatably connected to the top surface of the upper annular plate 79. The transmission gear 12 meshes with both the main rack 10 and the secondary rack 11. The secondary rack 11 is radially slidably connected to the top surface of the upper annular plate 79. A marking pen 13 is fixed to the top of the secondary rack 11.

[0031] The main rack 10 is located on the edge of the fixed seat 711 on one of the grippers 71. If the stud is detected to be tilted or the tightening force is low, the gripper 71 on the chuck clamp 7 is reset. At this time, the drive motor 77 on the chuck clamp 7 is started, forcing the gripper 71 to release the stud. After the gripper 71 releases the stud, it moves to the initial position. After the gripper 71 is reset, the drive motor 77 continues to run, thereby driving the gripper 71 to continue to move. At this time, the main rack 10 on the edge of the fixed seat 711 moves accordingly. The main rack 10 drives the transmission gear 12 to rotate, and the transmission gear 12 drives the secondary rack 11 to move. The secondary rack 11 drives the marker pen 13 to move until it contacts the stud. Then, the cylinder 9 drives the entire chuck clamp 7 to move upward, and the marker pen 13 can draw a line on the stud to make a mark. When the marker pen 13 is disengaged from the stud, the drive motor 77 runs, controlling the gripper 71 to move in the opposite direction and return to the initial position. Similarly, it can drive the marker pen 13 to move in the opposite direction and reset. By setting up the main rack 10, the auxiliary rack 11, the transmission gear 12, and the marker pen 13, when a welding quality problem of the stud is detected, the chuck clamp 7 and the cylinder 9 can be activated to use the marker pen 13 to draw a line on the problematic stud, thereby making a mark, which facilitates the subsequent rectification work. Moreover, the marking action is coordinated with the reset of the clamp 71, which is time-saving and efficient.

[0032] Example 6, see Figures 2-8 Unlike the above embodiments, the heat-conducting plate 4 is fitted with an isolation sleeve 14. A base block is fixed to the top edge of the isolation sleeve 14, and a return spring 15 is fixed to the bottom of the base block. The return spring 15 is fixedly connected to the top surface of the heat-conducting plate 4. The bottom surface of the heat-conducting plate 4 is provided with a downwardly oriented air outlet 16. The air outlet 16 is connected to the airflow cavity 41, and a solenoid valve is installed in the air outlet 16. An on / off valve is provided on the air outlet pipe 43.

[0033] The return springs 15 are set at the top edge of the heat-conducting plate 4 in multiple evenly distributed positions. The return springs 15 support the isolation sleeve 14. During welding, the welding torch 3 moves down and also moves the isolation sleeve 14 down. The isolation sleeve 14 isolates the area around the welding point, and the heat-conducting plate 4 isolates the area above the welding point, which can prevent the sparks from splashing outwards, thereby preventing the sparks from damaging the equipment or injuring the workers. After welding is completed, the welding torch 3 moves up and forces the isolation sleeve 14 to detach from the welding surface. Then the solenoid valve is opened, the on / off valve is closed, and the airflow heat exchange component 5 is started. The airflow formed can be discharged downwards through the air outlet 16 at the bottom of the heat-conducting plate 4, thereby blowing away the spark slag on the welding surface and preventing the heat conduction efficiency from decreasing after the heat-conducting plate 4 is pressed on the spark slag.

[0034] Example 7, see Figures 2-8 Unlike the above embodiments, an infrared temperature sensor 17 is fixed to the side wall of the isolation sleeve 14, and the infrared temperature sensor 17 is tilted and points directly below the welding torch 3.

[0035] The infrared temperature sensor 17 is used to monitor the temperature of the welding point after welding. The infrared temperature sensor 17 is also connected to the air pump 52 and the semiconductor cooling chip 53 through the PLC system. In actual application, after welding is completed, the machine tool 1 controls the welding torch 3 to lift, which forces the infrared temperature sensor 17 to move upward. At this time, the infrared temperature sensor 17 points to the welding point, thereby measuring the temperature of the welding point and converting the temperature signal into an electrical signal and transmitting it to the PLC. The PLC compares and calculates the set temperature with the measured temperature and outputs a control signal. On the one hand, it adjusts the output power of the air pump 52 to change the cooling air volume, and on the other hand, it controls the voltage, current or on / off of the semiconductor cooling chip to adjust the air supply temperature. Then, the cylinder 9 is started to carry out cooling and quality inspection. By setting up an infrared temperature sensor 17, the temperature and flow rate of the air conditioner can be adjusted according to the temperature, thus saving more energy.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for a distribution box, comprising a machine tool (1), an assembly base (2) mounted on the machine tool (1), and a welding torch (3) mounted on the assembly base (2), characterized in that: The welding torch (3) has a horizontally arranged heat-conducting plate (4) at its bottom end. The heat-conducting plate (4) has a circular hole in its center. The heat-conducting plate (4) is fitted onto the welding torch (3) through the circular hole. An airflow cavity (41) is provided inside the heat-conducting plate (4). An airflow heat exchange assembly (5) for cooling the heat-conducting plate (4) is installed on the mounting base (2). An assembly frame (6) is fixed above the heat-conducting plate (4). A chuck clamp (7) and a clamp drive are installed inside the assembly frame (6). The moving part (8) is used to clamp the welded stud. The chuck clamp (7) includes multiple circumferentially distributed jaws (71). The clamp driving part (8) is used to drive the chuck clamp (7) to move along the axis of the welding gun (3). The clamp driving part (8) includes a vertical pressure sensor (81) connected to the bottom of the chuck clamp (7). The welding gun (3) is also fixed with a cylinder (9) for driving the assembly frame (6) to move along the axis of the welding gun (3). The chuck fixture (7) is provided with a marking component, which is used to mark defective studs.

2. The welding fixture for a distribution box body according to claim 1, characterized in that: An air inlet pipe (42) and an air outlet pipe (43) are fixedly connected above the heat-conducting plate (4). The air inlet pipe (42) and the air outlet pipe (43) are respectively connected to both ends of the airflow cavity (41). The airflow heat exchange assembly (5) includes a housing (51) and an air pump (52) fixed on the mounting base (2). A semiconductor cooling chip (53) is fixedly embedded on the side wall of the housing (51). An outer heat dissipation fin (54) is fixed on the outside of the semiconductor cooling chip (53). A cooling fan (55) is fixed on the outer heat dissipation fin (54). An inner heat dissipation fin (56) is fixed on the inside of the semiconductor cooling chip (53). One end of the air inlet pipe (42) is fixedly connected to the side wall of the housing (51). The side of the housing (51) away from the air inlet pipe (42) is fixedly connected to the output end of the air pump (52).

3. The welding fixture for a distribution box body according to claim 1, characterized in that: The chuck clamp (7) includes an upper annular plate (79) sleeved on the welding torch (3). The surface of the upper annular plate (79) has multiple radially arranged grooves (72) in an annular array. Each radially arranged groove (72) has a strip-shaped hole (73) aligned with its direction. A strip-shaped slider (74) is slidably connected inside the radially arranged groove (72). The gripper (71) is fixedly mounted on the top of the strip-shaped slider (74). The bottom of the upper annular plate (79) is rotatably connected to... A concentric gear (75) is connected, and multiple arc-shaped holes (76) are arranged in a ring array on the surface of the concentric gear (75). A pin (70) is fixed at the bottom of the strip slider (74). The bottom end of the pin (70) passes through the strip hole (73) and the arc-shaped hole (76) in sequence. A drive motor (77) is fixed on the upper annular plate (79). A drive gear (78) is fixed at the output end of the drive motor (77). The drive gear (78) meshes with the concentric gear (75).

4. The welding fixture for a distribution box body according to claim 3, characterized in that: The gripper (71) includes a fixed base (711) fixed on a strip slider (74). The fixed base (711) has multiple lateral pressure sensors (712) fixed on the side facing the welding gun (3). The multiple lateral pressure sensors (712) are evenly distributed in the vertical direction. The fixed base (711) has a clamping block (713) on the side near the welding gun (3). The clamping block (713) is fixedly connected to the multiple lateral pressure sensors (712).

5. The welding fixture for a distribution box body according to claim 3, characterized in that: The clamp drive unit (8) is configured in two sets and symmetrically distributed on both sides of the chuck clamp (7). The clamp drive unit (8) includes a vertical motor (85). A screw (82) is fixed at the output end of the vertical motor (85). The axis of the screw (82) is consistent with the axis of the welding torch (3). Two bearing seats (83) are installed on the screw (82). Both bearing seats (83) are fixed to the assembly frame (6). Nuts are also threaded onto the screw (82). The nut seat (84) is slidably connected to the assembly frame (6), and the sliding direction is consistent with the axial direction of the screw (82). The vertical pressure sensor (81) is fixed on the top of the nut seat (84). The top of the vertical pressure sensor (81) is fixedly connected to the bottom of the upper annular plate (79). When the vertical motor (85) is running, it forces the screw (82) to rotate, thereby driving the nut seat (84) and the vertical pressure sensor (81) to move along the axial direction of the welding gun (3).

6. The welding fixture for a distribution box body according to claim 4, characterized in that: The marking assembly includes a main rack (10), a secondary rack (11), and a transmission gear (12). The main rack (10) is fixed to the edge of the fixed base (711). The upper annular plate (79) is also provided with a secondary rack (11) and a transmission gear (12) on its top. The transmission gear (12) is rotatably connected to the top surface of the upper annular plate (79). The transmission gear (12) meshes with both the main rack (10) and the secondary rack (11). The secondary rack (11) is radially slidably connected to the top surface of the upper annular plate (79). A marking pen (13) is fixed to the top of the secondary rack (11).

7. The welding fixture for a distribution box body according to claim 2, characterized in that: An isolation sleeve (14) is fitted on the outside of the heat-conducting plate (4). A base block is fixed to the top edge of the isolation sleeve (14), and a reset spring (15) is fixed to the bottom of the base block. The reset spring (15) is fixedly connected to the top surface of the heat-conducting plate (4).

8. The welding fixture for a distribution box body according to claim 7, characterized in that: The bottom surface of the heat-conducting plate (4) is provided with a downward-facing air outlet (16), which is connected to the airflow cavity (41). A solenoid valve is installed in the air outlet (16), and an on / off valve is provided on the air outlet pipe (43).

9. The welding fixture for a distribution box body according to claim 8, characterized in that: An infrared temperature sensor (17) is fixed to the side wall of the isolation sleeve (14), and the infrared temperature sensor (17) is tilted and points directly below the welding torch (3).

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