Fixed point type automatic spot welding machine

Abstract

The invention relates to the technical field of welding, and provides a fixed point type automatic spot welding machine which comprises a frame body, a welding control cabinet, a lower electrode and an upper electrode, the welding control cabinet is fixedly connected with an upper supporting arm and a lower supporting arm, the upper electrode is arranged on the upper supporting arm in a lifting mode, and the fixed point type automatic spot welding machine further comprises a limiting assembly, a moving assembly, an auxiliary pressing assembly and a cooling mechanism. The multiple limiting assemblies are used for clamping workpieces, the moving assembly is used for driving the welding control cabinet to move, the auxiliary pressing assembly is used for pressing the welding position, the auxiliary pressing assembly comprises a fixing ring and a pressing ring, the fixing ring is fixedly connected to the lower supporting arm, and the pressing ring is fixedly connected to the lower supporting arm. The pressing ring is connected to the upper electrode through the pressing spring and the telescopic rod, the cooling mechanism is matched with the auxiliary pressing assembly to cool the welding position, and the cooling mechanism comprises a cooling-water machine. By means of the technical scheme, the problems that in the prior art, a workpiece is manually held by hand for welding, the welding precision is low, and certain danger exists are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and in particular to a fixed-point automatic spot welding machine. Background Art

[0002] The spot welder uses the principle of double-sided double-point overcurrent welding. During operation, two electrodes pressurize the workpiece so that the two layers of metal form a certain contact resistance under the pressure of the two electrodes. When the welding current flows from one electrode to the other, an instantaneous thermal weld is formed at the two contact resistance points. The welding current instantly flows from the other electrode along the two workpieces to this electrode to form a loop without damaging the internal structure of the workpiece being welded.

[0003] When welding a workpiece with a current spot welding machine, the operator generally holds the workpiece and places it on the electrode, and welding is achieved by applying pressure from the other electrode. The workpiece needs to be fixed manually, and the welding accuracy is difficult to control. There is a lot of manual participation, which is time-consuming and labor-intensive. At the same time, the welding position is instantaneously heated to a high temperature during welding, and manually holding the workpiece also poses a major safety hazard. Therefore, we propose a fixed-point automatic spot welding machine that can mechanically clamp the workpiece, reduce manual participation, is safer, and has higher welding accuracy. Summary of the Invention

[0004] The present invention provides a fixed-point automatic spot welding machine, which solves the problem in the prior art of using manual hand-held workpieces for welding, which has low welding precision and certain risks.

[0005] The technical solutions of the present invention are as follows: A fixed-point automatic spot welding machine, comprising a frame, a welding control cabinet, a lower electrode, and an upper electrode, wherein the welding control cabinet is fixedly connected to an upper support arm and a lower support arm, the upper electrode is liftably arranged on the upper support arm, and the lower electrode is fixedly connected to the lower support arm, and further comprising: A plurality of limit assemblies are provided for clamping the workpiece, and the limit assemblies include: an electromagnet, the electromagnet being in contact with the frame, the frame being made of iron metal; A support frame, the support frame is fixedly connected to the top of the electromagnet, and the top of the support frame is flush with the top of the lower electrode; A limiting frame, the limiting frame is arranged on the supporting frame; A limit plate, the limit plate is arranged on the limit frame through a limit spring and a telescopic rod, and the limit plate and the support frame cooperate to clamp the workpiece; A moving component, which is used to drive the welding control cabinet to move, and the moving component includes: A movable seat, wherein the movable seat is movably arranged on the frame, and the welding control cabinet is movably arranged on the movable seat, and the moving direction of the welding control cabinet and the moving direction of the movable seat are perpendicular to each other; An auxiliary pressing assembly, which is used to press the welding position, and includes: a fixing ring, the fixing ring being fixedly connected to the lower support arm, wherein the top of the fixing ring is flush with the top of the lower electrode; A clamping ring, which is connected to the upper electrode via a clamping spring and a telescopic rod. The clamping ring rises and falls with the upper electrode and cooperates with the fixing ring to clamp the workpiece. A cooling mechanism, which cooperates with the auxiliary pressing assembly to cool the welding position, and the cooling mechanism includes: A water chiller is installed on the welding control cabinet, the fixing ring and the clamping ring are connected to a water inlet pipe and a water outlet pipe, the water chiller is connected to a water supply pipe and a return pipe, the water supply pipe is connected to the two water inlet pipes, and the return pipe is connected to the two water outlet pipes.

[0006] In order to assist in cooling the welding position, an auxiliary cooling mechanism is also included, which is used to cool the welding position with air. The auxiliary cooling mechanism includes: a drive shaft, the drive shaft being rotatably connected to the upper support arm; A plurality of fan blades are provided, and the fan blades are fixedly connected to the outside of the drive shaft; A driving component, the driving component is used to drive the driving shaft to rotate, and the driving component includes: A water drop bin, the water drop bin is connected to the water supply pipe; The blades are provided with a plurality of blades, the interior of the water tank is rotatably connected to a drive rod, the blades are fixedly connected to the outside of the drive rod at equal angles, the drive rod is connected to the drive shaft through a transmission assembly, and the transmission assembly includes: A transmission rod, wherein the transmission rod and the driving rod are coaxially fixedly connected; A driving bevel gear, the driving bevel gear being fixedly connected to an end of the transmission rod away from the driving rod; A driven bevel gear is fixedly connected to an end of the drive shaft away from the fan blades, and the driven bevel gear is meshed with the driving bevel gear.

[0007] In order to support the workpiece, the limiting frame is fixedly connected to a rotating shaft, and a through hole for the rotating shaft to pass through is opened on the supporting frame.

[0008] In order to further improve the clamping stability of the workpiece, a magnet plate is fixedly connected to the top of the support frame, and the material of the limit plate is iron metal.

[0009] In order to adapt to the clamping of workpieces of different thicknesses, an adjustment component is also included, which is used to adjust the height of the limit plate. The adjustment component includes: An adjusting plate, wherein the adjusting plate is rotatably connected to an adjusting screw, and the adjusting screw is threadedly connected to the limiting frame; A sliding rod is fixedly connected to the adjustment plate, and the sliding rod and the limiting frame are in sliding cooperation.

[0010] In order to further improve the stability of the workpiece, an elastic anti-slip pad is fixedly connected to one end of the limiting plate away from the adjusting plate.

[0011] The working principle and beneficial effects of the present invention are: 1. In the present invention, the workpiece is placed on the support frame, the limit plate is rotated to the top of the support frame by rotating the rotating shaft, the limit plate is driven by the limit spring to press the workpiece on the support frame, and the height of the limit plate is adjusted by rotating the adjusting screw to adapt to the processing of workpieces of different thicknesses. The position of the support frame can be adjusted more freely by the electromagnet to adapt to the clamping of workpieces of different sizes. The upper electrode and the lower electrode are driven by the welding control cabinet to move to the welding position for spot welding. The workpiece is in a stable state, manual participation is reduced, and the stability of the workpiece is ensured.

[0012] 2. In the present invention, when the upper electrode descends to weld the workpiece, the clamping ring first contacts the workpiece to clamp the workpiece, and the upper electrode and the lower electrode cooperate to spot weld the workpiece. After welding is completed, the chiller delivers cold water to the inside of the fixing ring and the clamping ring to quickly cool the welding position.

[0013] 3. In the present invention, when cold water is fed into the fixing ring and the clamping ring through the water supply pipe, the cold water first enters the interior of the water drop bin, and the water flow from top to bottom drives the blades and the drive rod to rotate, and drives the drive shaft and the fan blades to rotate under the action of the transmission assembly, which can assist in air cooling the welding position, further improve the efficiency of cooling the welding position, and at the same time, the welding position can be purged to reduce the influence of impurities on welding.

[0014] 4. Therefore, compared with the spot welding machine in the prior art, the present invention clamps the workpiece through the cooperation of the support frame and the limit plate, drives the upper electrode and the lower electrode to move through the welding control cabinet, and spot welds the workpiece, which reduces manual participation. At the same time, the workpiece is in a fixed state, which improves the accuracy of welding. During the spot welding process, the clamping ring and the fixed ring cooperate to clamp and limit the welding position, further improving the stability of the workpiece. At the same time, the chiller is used to transport cold water to the inside of the fixed ring and the clamping ring to cool the welding position. At the same time, the cold water is pushed to rotate the blades and the drive rod during the cold water transportation process, and the drive shaft and the fan blades are driven to rotate under the action of the transmission assembly, and the welding position is auxiliary cooled by air, so that the welding quality is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic structural diagram of the present invention from a first viewing angle; Figure 2 It is a structural schematic diagram of the second viewing angle of the present invention; Figure 3 Schematic diagram of the structure of the limit assembly of the present invention; Figure 4 It is a structural schematic diagram of the auxiliary pressing assembly, cooling mechanism and auxiliary temperature-lowering mechanism of the present invention; Figure 5 It is a structural schematic diagram of the cooling mechanism and the auxiliary cooling mechanism of the present invention; Figure 6 This is a schematic structural diagram of the auxiliary cooling mechanism of the present invention; Figure 7 For the present invention Figure 1 Schematic diagram of the local enlarged structure at A in the middle; Figure 8 For the present invention Figure 2 Schematic diagram of the local enlarged structure at point B in the middle.

[0017] In the picture: 1. Frame; 2. Welding control cabinet; 3. Lower electrode; 4. Upper electrode; 5. Upper support arm; 6. Lower support arm; 7. Electric cylinder; 101. electromagnet; 102. support frame; 103. limit frame; 104. limit plate; 105. rotating shaft; 106. magnet plate; 107. elastic anti-skid pad; 201, adjustment plate; 202, slide rod; 203, adjustment screw; 301, moving seat; 302, screw feed mechanism; 303, driving electromagnet; 401, fixing ring; 402, clamping ring; 501, chiller; 502, water inlet pipe; 503, water outlet pipe; 504, water supply pipe; 505, water return pipe; 601, drive shaft; 602, fan blade; 701, water tank; 702, blade; 703, driving rod; 801, transmission rod; 802, driving bevel gear; 803, driven bevel gear. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0019] like Figures 1 to 8 As shown, this embodiment proposes a fixed-point automatic spot welding machine, including a frame 1, a welding control cabinet 2, a lower electrode 3 and an upper electrode 4, the welding control cabinet 2 is fixedly connected to an upper support arm 5 and a lower support arm 6, the upper electrode 4 can be raised and lowered on the upper support arm 5, and an electric cylinder 7 is installed on the upper support arm 5, and the upper electrode 4 is fixedly installed at the output end of the electric cylinder 7, the bottom end of the workpiece is in contact with the lower electrode 3, and the upper electrode 4 is driven by the electric cylinder 7 to drop to contact with the top of the workpiece, and the two electrodes pressurize the workpiece so that the two layers of metal form a certain contact resistance under the pressure of the two electrodes, and when the welding current flows from one electrode through the other electrode, an instantaneous thermal melt is formed at the two contact resistance points, and the welding current instantly flows from the other electrode along the two workpieces to this electrode to form a loop, thereby realizing spot welding of the two metals, the lower electrode 3 is fixedly connected to the lower support arm 6, and also includes a limit assembly, a moving assembly Parts, auxiliary clamping components and cooling mechanisms, compared with the spot welding machines in the prior art, the present invention clamps the workpiece through the cooperation of the support frame 102 and the limit plate 104, drives the upper electrode 4 and the lower electrode 3 to move through the welding control cabinet 2, and spot welds the workpiece, reducing manual participation. At the same time, the workpiece is in a fixed state, which improves the accuracy of welding. During the spot welding process, the clamping ring 402 and the fixed ring 401 cooperate to clamp and limit the welding position, further improving the stability of the workpiece. At the same time, cold water is transported to the inside of the fixed ring 401 and the clamping ring 402 through the chiller 501 to cool the welding position. At the same time, the blades 702 and the drive rod 703 are pushed to rotate during the cold water delivery process, and the drive shaft 601 and the fan blades 602 are driven to rotate under the action of the transmission assembly, and the welding position is auxiliary cooled by air, so that the welding quality is better.

[0020] There are multiple limit assemblies for clamping the workpiece. The limit assemblies include an electromagnet 101, a support frame 102, a limit frame 103 and a limit plate 104. The electromagnet 101 is in contact with the frame 1. The frame 1 is made of iron metal. The support frame 102 is fixedly connected to the top of the electromagnet 101. The top of the support frame 102 is flush with the top of the lower electrode 3. The limit frame 103 is set on the support frame 102. The limit plate 104 is set on the limit frame 103 through a limit spring and a telescopic rod. The limit plate 104 and the support frame 102 cooperate to clamp the workpiece. When the electromagnet 101 is energized, it generates magnetism and can be adsorbed on the frame 1. When the electromagnet 101 is de-energized, it loses its magnetism, so that the position of the limit component can be freely moved, and the edge of the workpiece is placed or other positions that need to be fixed. For example, when welding metal rods that are staggered with each other, the intersection of the metal rods is clamped, and between the limit plate 104 and the support frame 102, the limit plate 104 is driven by the action of the limit spring to press the workpiece onto the support frame 102. At the same time, the bottom end of the workpiece contacts the lower electrode 3, which facilitates the subsequent cooperation of the upper electrode 4 and the lower electrode 3 to spot weld the workpiece.

[0021] In order to support the workpiece, the limit frame 103 is fixedly connected to the rotating shaft 105, and a through hole is opened on the support frame 102 for the rotating shaft 105 to pass through. The top of the support frame 102 is fixedly connected to the magnet plate 106, and the material of the limit plate 104 is iron metal. The end of the limit plate 104 away from the adjustment plate 201 is fixedly connected to the elastic anti-skid pad 107, and the rotating shaft 105 can rotate and slide inside the through hole. The end of the rotating shaft 105 away from the limit frame 103 is fixedly connected to the baffle. The limit frame 103 can be moved away from the support frame 102 by sliding the rotating shaft 105, and the limit frame 103 can be rotated to the bottom of the support frame 102, so that the support frame 10 2 is at the highest point of the limit assembly, supporting the middle position of the workpiece and further improving the stability of the workpiece. When the limit plate 104 is above the support frame 102 to clamp the edge of the workpiece, the magnet plate 106 attracts the iron metal workpiece, which can maintain the stability of the workpiece to a certain extent. At the same time, the magnet plate 106 and the limit plate 104 attract each other, and the limit plate 104 presses the workpiece against the top of the support frame 102. If the welding workpiece is an uneven surface, such as welding staggered bars, the elastic deformation of the elastic anti-slip pad 107 can adapt to workpieces of different shapes and can contact the tops of the two metals to be welded, thereby ensuring the stability of the workpiece.

[0022] The adjusting screw 203 is threadably connected to the adjusting plate 201 , and the adjusting screw 203 is fixedly connected to the adjusting plate 201 , and the sliding bar 202 and the limit frame 103 are in sliding cooperation. By rotating the adjusting screw 203 , the height of the adjusting plate 201 can be adjusted, that is, the pressure of the limit plate 104 on the support frame 102 can be adjusted. If the thickness of the workpiece is larger, the adjusting plate 201 is moved away from the support frame 102 to reduce the pressure between the limit plate 104 and the support frame 102. If the thickness of the workpiece is smaller, the adjusting plate 201 is moved close to the support frame 102 to increase the pressure between the limit plate 104 and the support frame 102 to adapt to the clamping of workpieces of different thicknesses.

[0023] The moving assembly is used to drive the welding control cabinet 2 to move. The moving assembly includes a moving seat 301, which is movably arranged on the frame 1. The frame 1 is equipped with a screw feed mechanism 302. The moving seat 301 and the screw in the screw feed mechanism 302 are threaded together. The welding control cabinet 2 is movably arranged on the moving seat 301. A driving electromagnet 303 is fixedly installed on the moving seat 301. The welding control cabinet 2 is fixedly connected to the output end of the driving electromagnet 303. The moving direction of the welding control cabinet 2 is consistent with that of the moving seat 301. The moving directions are perpendicular to each other. The moving seat 301 is driven to move along the X-axis of the frame 1 by the screw feed mechanism 302, and the welding control cabinet 2 is driven to move along the Y-axis of the frame 1 by driving the electromagnet 303, so as to adjust the position of the upper electrode 4 and the lower electrode 3, so that they are moved to the spot welding position for welding. The workpiece is in a fixed state, and welding is performed by moving the upper electrode 4 and the lower electrode 3 to ensure the stability of the workpiece. A plurality of ball bearings are rotatably connected to the bottom end of the welding control cabinet 2 to reduce the resistance when the welding control cabinet 2 moves.

[0024] The auxiliary clamping assembly is used to clamp the welding position. The auxiliary clamping assembly includes a fixing ring 401 and a clamping ring 402. The fixing ring 401 is fixedly connected to the lower support arm 6. The top of the fixing ring 401 is flush with the top of the lower electrode 3. The clamping ring 402 is connected to the upper electrode 4 through a clamping spring and a telescopic rod. The clamping ring 402 rises and falls with the upper electrode 4 and cooperates with the fixing ring 401 to clamp the workpiece. During the spot welding process of the workpiece, the fixing ring 401 moves with the lower electrode 3. The fixing ring 401 and the lower electrode 3 are located between the two metals. The bottom end of the metal below is in contact, and the bottom end height of the clamping ring 402 is slightly lower than the bottom end height of the upper electrode 4. When the driving electromagnet 303 drives the upper electrode 4 to descend, the clamping ring 402 first contacts the metal located above the two metals to clamp the workpiece to ensure the stability of the welding position. Then the upper electrode 4 contacts the workpiece and cooperates with the lower electrode 3 to perform electric welding on the workpiece. The elasticity of the clamping spring and the telescopic rod are used to adapt to the lifting and lowering of the upper electrode 4 within a certain range, that is, the clamping ring 402 first contacts the workpiece and then separates from the workpiece.

[0025] The cooling mechanism and the auxiliary pressing assembly cooperate to cool the welding position. The cooling mechanism includes a chiller 501, which is installed on the welding control cabinet 2. The fixed ring 401 and the pressing ring 402 are both connected with a water inlet pipe 502 and a water outlet pipe 503. The chiller 501 is connected with a water supply pipe 504 and a return pipe 505. The water supply pipe 504 is connected with the two water inlet pipes 502, and the return pipe 505 is connected with the two water outlet pipes 503. The chiller 501 produces cold water and sends it into the interior of the fixed ring 401 and the pressing ring 402 through the water supply pipe 504 and the water inlet pipe 502. A partition is provided between the water inlet pipe 502 and the water outlet pipe 503. After the cold water enters from the water inlet pipe 502, it is filled with the fixed ring 401 and the pressing ring 402. The tightening ring 402 flows back to the chiller 501 from the outlet pipe 503 and the return pipe 505. The fixing ring 401 and the clamping ring 402 are in close contact with the workpiece and are in the welding position, and the welding position is quickly cooled to avoid the clamping ring 402 and the fixing ring 401 being in the welding position for a long time to produce high-temperature deformation or damage, while reducing the high-temperature deformation of the workpiece. The workpiece is between the two water inlet pipes 502 and the two water outlet pipes 503 to avoid obstruction to the movement of the welding control cabinet 2, the upper electrode 4 and the lower electrode 3. The water inlet pipe 502 and the water outlet pipe 503 connected to the clamping ring 402 are connected to the water supply pipe 504 and the return pipe 505 respectively through telescopic pipes, so as to adapt to the lifting and lowering of the clamping ring 402 with the upper electrode 4.

[0026] In order to assist in cooling the welding position, an auxiliary cooling mechanism is also included. The auxiliary cooling mechanism is used to cool the welding position with air. The auxiliary cooling mechanism includes a drive shaft 601, a fan blade 602 and a drive component. The drive shaft 601 is rotatably connected to the upper support arm 5. A plurality of fan blades 602 are provided. The fan blades 602 are fixedly connected to the outside of the drive shaft 601. The drive component is used to drive the drive shaft 601 to rotate. The drive component includes a water drop bin 701 and blades 702. The water drop bin 701 is connected to the water supply pipe 504. A plurality of blades 702 are provided. The interior of the water drop bin 701 is rotatably connected to a drive rod 703. The blades 702 are fixedly connected to the outside of the drive rod 703 at equal angles. The drive rod 703 is connected to the drive shaft 601 through a transmission assembly. The transmission assembly includes a transmission rod 801, a driving bevel gear 802 and a driven bevel gear 803. The transmission rod 801 and the drive rod 703 are coaxially fixed. The drive bevel gear 802 is fixedly connected to the end of the transmission rod 801 away from the driving rod 703, and the driven bevel gear 803 is fixedly connected to the end of the driving shaft 601 away from the fan blade 602. The driven bevel gear 803 and the drive bevel gear 802 are meshed. When the chiller 501 supplies water to the clamping ring 402 and the fixed ring 401 through the water supply pipe 504 and the water inlet pipe 502, the water flow from top to bottom impacts and pushes the blade 702. The water supply pipe 504 is located at the side position off-center of the water drop bin 701, and impacts the side of the blade 702 away from the driving rod 703, driving the driving rod 703 to rotate, thereby driving the transmission rod 801 and the drive bevel gear 802 to rotate, the drive bevel gear 802 drives the driven bevel gear 803 and the driving shaft 601 to rotate, and the driving shaft 601 drives the fan blade 602 to rotate to form cold wind, which cools the welding position with air cooling, further improving the cooling effect of the welding point.

[0027] The working principle or use process of this fixed point automatic spot welding machine is as follows: Select an appropriate number of limit assemblies according to the shape and size of the welding workpiece, so that the support frame 102 is located at the edge position of the workpiece to be welded, and the workpiece to be welded is placed above the support frame 102. You can also select an appropriate number of support frames 102 according to the shape of the workpiece to be welded and place them in the middle position of the workpiece to support it. The limit frame 103 of the limit assembly at the middle position is below the support frame 102, and the limit frame 103 at the edge position is above the support frame 102. Turn the adjusting screw 203 to adjust the height of the adjusting plate 201 and the limit plate 104. The limit plate 104 presses the workpiece to be welded above the support frame 102; The screw feed mechanism 302 and the driving electromagnet 303 drive the welding control cabinet 2 to move the upper electrode 4 and the lower electrode 3 to the welding position. The electric cylinder 7 drives the upper electrode 4 and the clamping ring 402 to descend. The clamping ring 402 first contacts the workpiece and cooperates with the fixing ring 401 to clamp and limit the welding area. Then, the upper electrode 4 contacts the workpiece and the upper electrode 4 and the lower electrode 3 cooperate to weld the workpiece. After welding is completed, the electric cylinder 7 drives the upper electrode 4 to rise to a certain height. At this time, the clamping ring 402 is still in contact with the workpiece. The chiller 501 produces cold water and transports it to the inside of the clamping ring 402 and the fixed ring 401 through the water supply pipe 504 and the water inlet pipe 502 to cool the welding position. When the cold water flows from top to bottom inside the water supply pipe 504, it impacts and pushes the blades 702 in the water drop bin 701. Multiple blades 702 drive the driving rod 703 to rotate, and the driving rod 703 drives the transmission rod 801 and the driving bevel gear 802 to rotate. The driving bevel gear 802 drives the driven bevel gear 803, the driving shaft 601 and the fan blades 602 to rotate, and the welding position is cooled by air. Then the electric cylinder 7 drives the clamping ring 402 to rise away from the workpiece, and the screw feed mechanism 302 and the driving electromagnet 303 continue to drive the welding control cabinet 2 to move, and welding can be performed on another welding position.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fixed-point automatic spot welding machine, comprising a frame (1), a welding control cabinet (2), a lower electrode (3) and an upper electrode (4), wherein the welding control cabinet (2) is fixedly connected to an upper support arm (5) and a lower support arm (6), the upper electrode (4) is movably arranged on the upper support arm (5), and the lower electrode (3) is fixedly connected to the lower support arm (6), characterized in that: It also includes a limiting component, a moving component, an auxiliary pressing component and a cooling mechanism; Wherein, the said limiting components are provided in plurality and are used for clamping the workpiece; Wherein, the moving component is used to drive the welding control cabinet (2) to move; The auxiliary pressing assembly is used to press the welding position, and the auxiliary pressing assembly includes: A fixing ring (401), the fixing ring (401) is fixedly connected to the lower support arm (6), and the top of the fixing ring (401) is flush with the top of the lower electrode (3); A clamping ring (402), the clamping ring (402) is connected to the upper electrode (4) via a clamping spring and a telescopic rod, the clamping ring (402) rises and falls with the upper electrode (4), and cooperates with the fixing ring (401) to clamp the workpiece; The cooling mechanism cooperates with the auxiliary pressing assembly to cool the welding position, and the cooling mechanism includes: A water chiller (501), the water chiller (501) is installed on the welding control cabinet (2), the fixing ring (401) and the pressing ring (402) are both connected to a water inlet pipe (502) and a water outlet pipe (503), the water chiller (501) is connected to a water supply pipe (504) and a water return pipe (505), the water supply pipe (504) is connected to the two water inlet pipes (502), and the water return pipe (505) is connected to the two water outlet pipes (503).

2. A fixed point automatic spot welding machine according to claim 1, characterized in that: The limiting component includes: An electromagnet (101), the electromagnet (101) is in contact with the frame (1), and the frame (1) is made of iron metal; A support frame (102), the support frame (102) is fixedly connected to the top of the electromagnet (101), and the top of the support frame (102) is flush with the top of the lower electrode (3); A limiting frame (103), wherein the limiting frame (103) is arranged on the supporting frame (102); A limiting plate (104) is provided on the limiting frame (103) via a limiting spring and a telescopic rod, and the limiting plate (104) cooperates with the supporting frame (102) to clamp the workpiece.

3. A fixed point automatic spot welding machine according to claim 2, characterized in that: The mobile component includes: A movable seat (301) is movably arranged on the frame (1), and the welding control cabinet (2) is movably arranged on the movable seat (301), and the moving direction of the welding control cabinet (2) and the moving direction of the movable seat (301) are perpendicular to each other.

4. A fixed point automatic spot welding machine according to claim 3, characterized in that: The auxiliary cooling mechanism is used to cool the welding position with air. The auxiliary cooling mechanism includes: a drive shaft (601), the drive shaft (601) being rotatably connected to the upper support arm (5); a fan blade (602), wherein a plurality of the fan blades (602) are provided, and the fan blades (602) are fixedly connected to the outside of the drive shaft (601); A driving component is used to drive the driving shaft (601) to rotate.

5. A fixed point automatic spot welding machine according to claim 4, characterized in that: The driving component includes: A water drop bin (701), the water drop bin (701) is in communication with the water supply pipe (504); The blades (702) are provided in plurality, the interior of the water drop bin (701) is rotatably connected to a drive rod (703), the blades (702) are fixedly connected to the exterior of the drive rod (703) at equal angles, and the drive rod (703) is transmission-connected to the drive shaft (601) via a transmission assembly.

6. A fixed point automatic spot welding machine according to claim 5, characterized in that: The transmission assembly comprises: A transmission rod (801), wherein the transmission rod (801) and the driving rod (703) are coaxially fixedly connected; A driving bevel gear (802), the driving bevel gear (802) being fixedly connected to an end of the transmission rod (801) away from the driving rod (703); A driven bevel gear (803) is fixedly connected to an end of the drive shaft (601) away from the fan blade (602), and the driven bevel gear (803) is meshed with the drive bevel gear (802).

7. A fixed point automatic spot welding machine according to claim 6, characterized in that: The limiting frame (103) is fixedly connected to a rotating shaft (105), and a through hole for the rotating shaft (105) to pass through is provided on the supporting frame (102).

8. The fixed-point automatic spot welding machine according to claim 7, characterized in that: A magnet plate (106) is fixedly connected to the top of the support frame (102), and the limiting plate (104) is made of iron metal.

9. The fixed-point automatic spot welding machine according to claim 8, characterized in that: It also includes an adjustment component, which is used to adjust the height of the limit plate (104), and the adjustment component includes: An adjusting plate (201), wherein the adjusting plate (201) is rotatably connected to an adjusting screw (203), and the adjusting screw (203) is threadedly connected to the limiting frame (103); A sliding rod (202), wherein the sliding rod (202) is fixedly connected to the adjustment plate (201), and the sliding rod (202) and the limiting frame (103) are in sliding cooperation.

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