Full-automatic resistance spot welding machine device for cabinet body of energy storage cabinet

Abstract

The invention belongs to the technical field of resistance spot welding, and particularly relates to a full-automatic resistance spot welding machine device for an energy storage cabinet body, which comprises an angle steel beam, an alignment clamping unit is arranged at one end of the angle steel beam, and a grinding unit is arranged at one end of the alignment clamping unit; according to the invention, through the circumferential movement of a clamping plate bin with a given interaction depth, the electrode arm and welding transformer wear extreme point location is sensed accumulatively at different time and different sites, and meanwhile, through the contact state between the electrode ring and the pressure monitoring ring, the detection precision of the extreme point location is further determined, so that the detection precision of the electrode arm and the welding transformer wear extreme point location in different time periods is realized. The oppositely-distributed clamping plate bins can always provide stable and adjustable targeted alignment clamping, buffering, energy absorbing and limiting for the electrode arm at a contact abrasion extreme point position, the nugget quality is guaranteed, the welding spot strength and consistency are improved, splashing and burning loss are reduced, the welding defect rate is reduced, a heat affected zone is reduced, and the appearance and performance of a workpiece are optimized.

Description

Technical Field

[0001] This invention belongs to the field of resistance spot welding technology, specifically relating to a fully automatic resistance spot welding machine for energy storage cabinets. Background Technology

[0002] Energy storage cabinet: The core load-bearing structure of the energy storage system must have high strength, airtightness and seismic resistance. Its welding process directly affects the overall performance. For example, the frame components are composed of columns, beams or longitudinal beams, etc., and are mostly thin-walled profiles (or plate splicing, which need to be spot welded to achieve a front-end rigid connection). Fully automatic resistance spot welding machine: Based on the Joule heating effect and mechanical pressure, pressure is applied to the workpiece through electrodes and supplemented with current. Heat is generated by the resistance at the contact point of the workpiece, causing local metal to melt and form a weld nugget. Finally, it cools and solidifies into a weld point under pressure. Analysis of coaxiality deviation during electrode cap welding process: In actual use, fully automatic resistance spot welding machines usually rely on robotic arms or gantry frames to achieve electrode positioning. However, external vibrations (such as high-frequency vibrations of adjacent stamping equipment or strong airflow (direct blowing from workshop fans and air conditioners) can cause "centering deviation" between the electrode and the workpiece. Vibration causes the electrode to undergo lateral displacement at the moment of contact, resulting in uneven current density distribution (excessive current density at the edges), and the weld point is "elliptical" rather than circular, leading to a decrease in welding strength. Insufficient repeatability of robotic arm: There are always assembly and debugging errors in the repeatability of robotic arm or gantry before and after (e.g., excessive gear and rack clearance or servo motor step loss), which causes the position deviation of the electrode cap to accumulate each time it is pressed down. Electrode arm thermal expansion: During high-frequency continuous welding, the electrode arm experiences thermal expansion due to resistance heat and localized rise in ambient temperature, which compromises the original assembly accuracy. Electrode cap wear and deformation: After long-term welding, the end face of the electrode cap will form a "mushroom-shaped deformation" due to high temperature and pressure, the diameter will increase, the end face will be uneven, resulting in deviation from the coaxiality with the lower electrode; Adverse consequences of coaxiality deviation: Coaxiality deviation causes uneven pressure distribution between the upper and lower electrodes, inconsistent contact resistance, and current concentration on one side, resulting in an elliptical weld joint, insufficient weld nugget diameter, and reduced weld joint strength.

[0003] In addition, excessively high local current density causes spattering; and insufficient local contact area between the electrode cap and the workpiece causes "overheating" problems such as surface carbonization and internal shrinkage cavities at the solder joint. Summary of the Invention

[0004] To solve the above problems, the present invention adopts the following technical solution: a fully automatic resistance spot welding machine for energy storage cabinet body, including two angle steel beams, which are distributed opposite each other. One end of the angle steel beam is provided with an alignment clamping unit, and the other end of the alignment clamping unit is provided with a grinding unit. The alignment clamping unit includes: Angle ring, snap-fitted and installed at the middle position of one end of the angle steel beam; The circular guide rail is coaxially snapped together and installed at the end of the corner ring away from the angle steel beam. The pedestals are arranged in pairs and symmetrically, and are installed on the end face of the annular guide rail away from the angle steel beam by sliding and snapping together with the support columns. The end plate is snap-fitted onto the end of the base away from the corner ring axis; The annular groove is located in the middle of the outer wall of the corner ring. An angular arc seat is snap-fitted onto the end plate away from the base, and the angular arc seat is slidably snap-fitted onto the annular groove for installation. Z-side seat, snap-fitted onto the end of the base away from the end plate; The telescopic rail is slidably and snapped onto the Z-side seat at the end away from the base via a spring rod.

[0005] Preferably, the telescopic rail is symmetrically fitted with an electric telescopic rod on the end face near the corner ring axis. Two electric telescopic rods in the same group are fitted with a support box at their movable ends. A layered plate is symmetrically fitted inside the support box at the end near the corner ring axis. An angle post is symmetrically fitted on the end face of the support box away from the electric telescopic rod, and the angle post and the layered plate are fitted together. A return spring is sleeved on the outer wall of the angle post between the two layered plates in the same group. A clamping chamber is fitted on the end of the two angle posts near the corner ring axis. A sealing ring is fitted on the outer wall of the end of the angle post away from the corner ring axis. An angle pad is fitted on the inner wall of the clamping chamber. An air valve is plugged into the outer wall of the horizontal section of the support box near the telescopic rail.

[0006] Preferably, in one group, the two corner columns have an air chamber that communicates with the clamping plate compartment. The inner wall of the clamping plate compartment on one side of the air chamber has evenly distributed air holes that pass through the corner pads. A shaft seat is snapped onto the outer wall of the sealing ring on one side of the air chamber. A pin is snapped onto the middle position of the end face of the shaft seat away from the axis of the sealing ring. An angle rod is symmetrically and rotatably installed at the middle position of the two layered plates on one side of the air chamber. A snake groove is formed on the outer wall of the end of the angle rod away from the clamping plate compartment. A strip groove is formed on the outer wall of the angle rod that is connected to the snake groove end to end. The strip groove has the same length as the axis of the angle rod. An end groove is formed on the outer wall of the end of the angle rod near the clamping plate compartment that is connected to the snake groove. The end groove is directly opposite to the strip groove and its length is equal to half of the strip groove.

[0007] Preferably, the angle bar shaft has a spline groove, and a spline rod is slidably engaged with the inner wall of the spline groove. A threaded rod is threadedly engaged with the end of the spline rod away from the layered plate on the vertical section of the support box away from the clamping plate compartment.

[0008] Preferably, in another group, each of the two corner column axes has an annular cavity, and a face ring is symmetrically fitted onto the inner wall of the annular cavity. A piston is slidably fitted onto the two face rings in the same group, and the diameter of the end of the piston away from the clamping plate compartment is equal to the diameter of the annular cavity. A telescopic spring is provided between the face rings and sleeved on the outer wall of the piston. An electrode ring is fitted onto the end of the piston near the axis of the corner ring. A pressure monitoring ring corresponding to the electrode ring is fitted onto the outer wall of the clamping plate compartment. A bridging ring is fitted onto the outer walls of the two bases.

[0009] Preferably, the two angle steel beams are connected to a base at the ends away from the angle rings. An H-frame is connected to the base at the end away from the angle steel beams. A cylinder seat is detachably installed at the end of the H-frame away from the direction of gravity by bolts. A pneumatic pressurizing cylinder is connected to the middle of the end of the cylinder seat away from the H-frame, and the movable end of the pneumatic pressurizing cylinder passes through the cylinder seat. A chassis connected to the ground is connected to the end of the H-frame away from the cylinder seat. A pressure holding seat is connected to the movable end of the pneumatic pressurizing cylinder. A welding transformer is connected to the end of the pressure holding seat near the angle steel beams and is slidably connected to the H-frame. An electrode arm is plugged into the end of the welding transformer away from the H-frames. An electrode cap is connected to the end of the electrode arm near the angle steel beams.

[0010] Preferably, the grinding unit includes: The fitting ring is rotatably fitted at one end of the corner ring near the angle steel beam, and the fitting ring extends out of the corner ring; The tiger head seat is detachably installed on the inner wall of the fitting ring by bolts, and there are at least three of them, evenly distributed around the circumference; The steel plate is snapped into place at the middle position on the side of the tiger head seat near the axis of the fitting ring; Telescopic cylinders are symmetrically snapped onto both ends of the pole steel plate; Multi-head clamping seat, snapped into the movable end of the telescopic cylinder; The temperature control gun is symmetrically snapped into the end of the multi-head socket away from the tiger head base; The temperature control valve is plugged in and installed at one end of the temperature control gun. The corner shovel is snapped into place at the middle of the end of the multi-head mounting base furthest from the telescopic cylinder.

[0011] Preferably, the outer diameter of the electrode arm is the same as the inner diameter of the clamping plate compartment, the angle between the temperature control gun and the corner shovel is at least 100 degrees, and the temperature control gun has an air vent on the inclined side away from the corner shovel, the height of the temperature control gun is greater than that of the corner shovel, and the corner shovel has a double chamfer on the side near the fitting ring.

[0012] A high-precision, targeted stabilization method for the coaxiality of the electrode arms of a fully automatic resistance spot welding machine is provided using the aforementioned fully automatic resistance spot welding machine for energy storage cabinets. The specific steps are as follows: S1: First, under the stable support of the cylinder seat, the pneumatic pressurizing cylinder controls the pressure holding seat to move the welding transformer on the same end toward the angle steel beam. At the same time, under the support and guidance of the H-steel frame, the welding transformer on the other side controls the electrode arm to move the electrode cap toward the angle steel beam until the electrode arm is close to the end of the angle steel beam and is directly opposite to the clamping plate compartment. S2: Then, the support box is controlled by the electric telescopic rod (with one end of the corner rod) to move the clamping plate compartment toward the direction of the corner ring axis until the inner wall of the clamping plate compartment coincides with the outer wall of the electrode arm (the electrode arm is in a predetermined initial position). After that, the platform, under the control of the ring guide rail, drives the aforementioned clamping plate compartment to move around the corner ring circumferentially for at least one revolution. During this process, due to the influence of the radial runout of the electrode arm, the wear degree of the electrode arm and the welding transformer at different contact points varies. When the clamping plate compartment moves in the circumferential direction, the interaction depth between the electrode arm and the corner pad varies at different contact points. At this time, the corner column moves in the opposite direction, and the snake groove and the ejector pin generate different degrees of interaction accumulation until the moving distance of the clamping plate compartment is equal to the current maximum radial runout distance. At the same time, two air valves are connected through an external hose, and gas is introduced into the aforementioned hose through an external air pump until the electrode ring contacts the pressure monitoring ring and maintains a predetermined pressure. After the clamping plate moves a certain angle or number of revolutions in the circumferential direction, when the value between the aforementioned electrode ring and the pressure monitoring ring is maintained at a predetermined value, the current situation is the targeted diagonal clamping of the clamping plate against the "extreme value" of the radial runout range. S3: Finally, under the dual support of the tiger head seat and the electrode steel plate, the telescopic cylinder controls the multi-head chuck to drive the temperature control gun and the corner shovel to move towards the corner ring axis until the corner shovel contacts the outer wall of the electrode cap. After that, the electric slider or gear set drives the fitting ring to rotate. Through the relative movement between the corner shovel and the electrode cap, the grinding and repair work of the impurities on the outer wall of the electrode cap is carried out. The temperature control gun is used to clean the grinding debris in time and quickly suppress the current thermal runaway state of the electrode cap. The present invention has the following beneficial effects: 1. This invention uses the circumferential movement of the clamping chamber at a predetermined interactive depth to cumulatively sense the "extreme point" of wear between the electrode arm and the welding transformer at different times and locations. Simultaneously, by measuring the contact state between the electrode ring and the pressure monitoring ring, the detection accuracy of the aforementioned "extreme point" is further determined. This enables the clamping chamber, under different time periods and relative distributions, to always be at the "extreme point" of contact wear, providing stable and adjustable targeted alignment, clamping, buffering, and energy absorption limits to the electrode arm. This ensures the quality of the weld nugget, improves the strength and consistency of the weld, reduces spatter and burn-off, lowers the welding defect rate, reduces the heat-affected zone, and optimizes the appearance and performance of the workpiece.

[0013] 2. This invention uses a three-point distributed corner chisel and temperature control gun with a fitting ring to perform grinding and cooling operations on the electrode cap surface. At the same time, the three-point layout allows for minor adaptive adjustment and compensation of processing errors, improving grinding uniformity. Furthermore, the three-point layout can effectively achieve alternating force on contact points and dynamic switching of grinding areas, significantly shortening the contact time between the grinding part and the workpiece, reducing thermal deformation and wear. The temperature control gun also dynamically optimizes local thermal runaway under high-frequency welding on the electrode cap surface, improving heat dissipation, preventing electrode overheating, and strengthening welding strength. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is an appendix to the present invention. Figure 1 Right view of the middle structure.

[0016] Figure 3 This is an appendix to the present invention. Figure 1 Left view of the middle structure (the alignment clamping unit is omitted).

[0017] Figure 4 This is a three-dimensional schematic diagram of the cylinder seat and its partial structure in this invention.

[0018] Figure 5 This is a three-dimensional structural diagram of the alignment clamping unit and grinding unit in this invention.

[0019] Figure 6 This is an appendix to the present invention. Figure 5 Top view of the middle section of the structure.

[0020] Figure 7 This is a cross-sectional view of the corner ring and its internal structure of the present invention.

[0021] Figure 8 This is a three-dimensional schematic diagram of a partial structure of the alignment clamping unit of the present invention.

[0022] Figure 9 This is a cross-sectional view of the internal structure of the support box and clamping silo of the present invention.

[0023] Figure 10 This is a three-dimensional schematic diagram of the corner rod and its structure in this invention.

[0024] Figure 11 This is a three-dimensional view of the corner rod and its other perspective in this invention.

[0025] Figure 12 This is a cross-sectional view of the internal structure of another support box and clamping silo of the present invention.

[0026] Figure 13This is a three-dimensional view of the grinding unit in this invention.

[0028] The diagram labels are: 1. Angle steel beam; 2. Alignment and clamping unit; 3. Grinding unit; 11. Base; 12. H-beam frame; 13. Cylinder base; 14. Pneumatic pressurizing cylinder; 15. Chassis; 16. Pressure holding base; 17. Welding transformer; 18. Electrode arm; 19. Electrode cap; 21. Angle ring; 22. Circular guide rail; 23. Base; 24. End plate; 25. Circular groove; 26. Angle arc seat; 27. Z-face seat; 28. Telescopic plate rail; 211. Electric telescopic pole; 212. Support box; 213. Layered plate; 214. Corner post; 215. Return spring; 216. Clamping plate compartment; 217. Sealing ring; 218. Corner pad; 219. Air valve; 221. Air chamber; 222. Air hole; 223. Shaft seat; 224. Ejector pin; 225. Angle rod; 226. Serpentine groove; 227. Slot; 228. End groove; 231. Spline groove; 232. Spline rod; 233. Lead screw; 241. Annular cavity; 242. Face ring; 243. Piston; 244. Telescopic spring; 245. Electrode ring; 246. Pressure monitoring ring; 247. Bridging ring; 31. Fitting ring; 32. Tiger head seat; 33. Extreme steel plate; 34. Telescopic cylinder; 35. Multi-head chuck; 36. Temperature control gun; 37. Temperature control valve; 38. Corner shovel. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] It should be noted that the terms "vertical," "horizontal," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0031] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0032] Reference Figure 1 and Figure 5 It is known that an automatic resistance spot welding machine for energy storage cabinet includes two angle steel beams 1, which are distributed opposite each other. One end of the angle steel beam 1 is provided with an alignment clamping unit 2, and the other end of the alignment clamping unit is provided with a grinding unit 3. Reference Figure 1 , Figure 2 and Figure 3 It can be seen that the two angle steel beams 1 are connected to the base 11 at the ends away from the angle ring 21. The base 11 is connected to the H-steel frame 12 at the ends away from the angle steel beams 1. The cylinder seat 13 is detachably installed at the ends of the H-steel frame 12 away from the direction of gravity by bolts. The pneumatic pressurizing cylinder 14 is connected to the middle position of the end of the cylinder seat 13 away from the H-steel frame 12, and the movable end of the pneumatic pressurizing cylinder 14 passes through the cylinder seat 13. The machine box 15 connected to the ground is connected to the end of the H-steel frame 12 away from the cylinder seat 13. The pressure holding seat 16 is connected to the movable end of the pneumatic pressurizing cylinder 14. The welding transformer 17 is connected to the end of the pressure holding seat 16 near the angle steel beams 1 and is slidably connected to the H-steel frame 12. The electrode arm 18 is plugged into the end of the welding transformer 17 away from the H-steel frame 12. The electrode cap 19 is connected to the end of the electrode arm 18 near the angle steel beams 1. Reference Figure 1 , Figure 2 , Figure 5 and Figure 7 It can be seen that the alignment clamping unit 2 includes: a corner ring 21, which is snap-fitted and installed at the middle position of one end of the angle steel beam 1; an annular guide rail 22, which is coaxially snap-fitted and installed at the end of the corner ring 21 away from the angle steel beam 1; a platform 23, which is arranged in pairs and symmetrically distributed, and is installed on the end face of the annular guide rail 22 away from the angle steel beam 1 by sliding snap-fitting through a support column; an end plate 24, which is snap-fitted and installed at the end of the platform 23 away from the axis of the corner ring 21; an annular groove 25, which is opened at the middle position of the outer wall of the corner ring 21; an arc-shaped seat 26, which is snap-fitted and installed at the end of the end plate 24 away from the platform 23, and the arc-shaped seat 26 is slidably snap-fitted and installed with the annular groove 25; a Z-face seat 27, which is snap-fitted and installed at the end of the platform 23 away from the end plate 24; and a telescopic plate rail 28, which is slidably snap-fitted and installed at the end of the Z-face seat 27 away from the platform 23 by a spring rod. Reference Figure 6 , Figure 7 , Figure 8 and Figure 9It can be seen that the telescopic rail 28 is symmetrically ring-locked with an electric telescopic rod 211 on the end face near the axis of the corner ring 21. The movable ends of the two electric telescopic rods 211 in the same group are jointly locked with a support box 212. The support box 212 is symmetrically locked with a layered plate 213 on the inside of the end face near the axis of the corner ring 21. The support box 212 is symmetrically slidably locked with a corner post 214 on the end face away from the electric telescopic rod 211, and the corner post 214 slides with the layered plate 213. The corner post 214 is fitted with a reset spring 215 between two layered plates 213 in the same group. The two corner posts 214 in the same group are fitted together with a clamping plate compartment 216 at the end near the axis of the corner ring 21. A sealing ring 217 is fitted with the outer wall of the corner post 214 away from the axis of the corner ring 21. An angle pad 218 is fitted with the inner wall of the clamping plate compartment 216. An air valve 219 is plugged into the outer wall of the horizontal section of the support box 212 near the telescopic rail 28. Reference Figure 7 , Figure 9 , Figure 10 and Figure 11 It can be seen that, on one of the sets, the two corner posts 214 are axially connected to the clamping plate compartment 216, and air cavities 222 are evenly distributed on the inner wall of the clamping plate compartment 216 on one side of the air cavity 221, which are connected to the corner pads 218. A bearing seat 223 is snapped onto the outer wall of the sealing ring 217 on one side of the air cavity 221. A pin 224 is snapped onto the middle position of the end face of the bearing seat 223 on the side away from the axis of the sealing ring 217. The middle position of the two layered plates 213 on one side of the air cavity 221 is... An angle rod 225 is symmetrically and rotatably installed. A snake groove 226 is formed on the outer wall of the end of the angle rod 225 away from the clamping plate compartment 216. A strip groove 227 is formed on the outer wall of the angle rod 225, which is connected to the snake groove 226 end to end. The strip groove 227 is the same length as the axis of the angle rod 225. An end groove 228 is formed on the outer wall of the end of the angle rod 225 near the clamping plate compartment 216, which is connected to the snake groove 226. The end groove 228 is distributed opposite to the strip groove 227, and its length is equal to half of the strip groove 227. Reference Figure 9 and Figure 10 It can be seen that the angle bar 225 has a spline groove 231 on its shaft, and a spline bar 232 is installed in sliding engagement with the inner wall of the spline groove 231. A threaded rod 233 is installed in the vertical section of the same support box 212 away from the clamping plate 216. Reference Figure 7 and Figure 12It can be seen that each of the two corner posts 214 in a group has an annular cavity 241 at its axis. The inner wall of the annular cavity 241 is symmetrically fitted with a face ring 242. The two face rings 242 in the same group are slidably fitted with a piston 243. The diameter of the end of the piston 243 away from the clamping plate 216 is equal to the diameter of the annular cavity 241. A telescopic spring 244 is provided between the face rings 242 and sleeved on the outer wall of the piston 243. An electrode ring 245 is fitted with the end of the piston 243 near the axis of the corner ring 21. A pressure monitoring ring 246 corresponding to the electrode ring 245 is fitted with the outer wall of the clamping plate 216. A bridging ring 247 is fitted with the outer walls of the two bases 23. The outer diameter of electrode arm 18 is the same as the inner diameter of clamping plate compartment 216.

[0033] Simplified welding process using a resistance spot welding machine: The operator places the thin plate to be welded (flat) between the corner rings 21. Then, the pneumatic pressure cylinder 14 compresses air to drive the pressure holding seat 16 to control the welding transformer 17 (which converts the input high voltage and low current into low voltage and high current to provide energy for welding) to move towards the corner rings 21 until the electrode arm 18 (which conducts welding current and applies pressure to the workpiece to be welded) drives the electrode cap 19 (which directly contacts the workpiece to be welded and melts the metal through resistance heat to form a weld point) to come into contact with the aforementioned workpiece to be welded (under a certain pressure). Monitoring process of radial runout "extreme value" of electrode arm 18 for clamping plate compartment 216 (end of angle bar 225): Prerequisite: Under the control of welding transformer 17, electrode arm 18 drives electrode cap 19 to move a predetermined distance into corner ring 21, so that the coaxiality between electrode cap 19 and corner ring 21 is relatively consistent. First, under the control of the electric telescopic rod 211, the support box 212 synchronously drives the clamping plate compartment 216 to move towards the axis of the corner ring 21 until the inner wall arc of the clamping plate compartment 216 is aligned with the orthographic projection arc of the electrode arm 18 in the predetermined initial state (the two do not overlap at different time periods due to radial jump). Next, under the support and guidance of the annular guide rail 22, the Z-side seat 27 synchronously controls the telescopic plate rail 28 to drive the electric telescopic rod 211 (with the corner rod 225 end) to move circumferentially along the axis of the corner ring 21 for a predetermined number of turns or angles (the number of turns is at least greater than one turn / the angle is greater than 360 degrees, to ensure that during the circumferential movement of the clamping plate 216, the contact wear depth of different points between the electrode arm 18 and the welding transformer 17 is covered, and the "extreme value" points of the aforementioned wear are absolutely fed back). In specific implementation, the electric slider can drive the platform 23 to move, and at the same time, the end plate 24 serves as a rigid connection bridge between the corner arc seat 26 and the platform 23, further ensuring the movement stability of the platform 23 in the high-precision assembly scenario of the corner arc seat 26 and the annular groove 25. Finally, during the circumferential movement, the clamping plate 216 makes differential contact with the radial runout of the electrode arms 18 at different angles. The clamping plate 216 provides a reverse force to the corner post 214, causing the corner post 214 to move towards the telescopic rail 28 under the combined support and guidance of the support box 212 and the layered plate 213 (in specific implementation, the aforementioned movement distance is directly affected by the interaction depth between the clamping plate 216 and the electrode arm 18). During this process (the contact depth between the clamping plate 216 and the electrode arm 18 can be gradually increased, decreased, or abruptly changed), the bearing seat 223, under the synchronous action of the sealing ring 217, controls the ejector pin 224 and the snake groove 226 to generate interactive movement (in the initial state, the ejector pin 224 is engaged with the end groove 228, and through the cooperation between the two, they mutually restrict each other's degrees of freedom of movement). Under the influence of the aforementioned interactive movement, the angle bar 225 is caused to rotate at different angles under the rigid support of the layered plate 213, and the spline bar 23... 2. Under the combined action of spline groove 231 (sliding guide) and support box 212 (threaded self-locking limit), the current sealing ring 217 is restricted from "resetting" (the reset spring 215 stores elastic potential energy in its own elastic variable until the ejector pin 224 enters the groove 227, and the moment the ejector pin 224 contacts the groove 227, it is the maximum "extreme value" of the current clamping plate 216's sensing and correction of the contact point of the electrode arm 18 and the welding transformer 17. This "extreme value" can support the clamping plate 216 to make multiple adaptive adjustments to the electrode arm 18 at different time periods). The process of determining the "extreme value" of the wear point of electrode arm 18 of clamping plate compartment 216: Prerequisite: The initial position of one clamping compartment 216 (without the corner bar 225 end) in the same group remains unchanged for the time being; Two air valves 219 are connected via external hoses. At the same time, external air is guided through the hoses to the support box 212 near the telescopic rail 28 (the inner wall of the vertical section of the support box 212 near the telescopic rail 28 and the adjacent layered plate 213 define the area). This continues until the pressure in the air passage of the support box 212 rises to a predetermined value. At this point, the gas exerts a reverse force on the piston 243, supporting the piston 243 under the support and guidance of the face ring 242, which drives the electrode ring 245 to move towards the clamping plate compartment 216 until the electrode ring 245 contacts the pressure monitoring ring 246 and maintains a certain interaction force (in specific implementation, the pressure changes of the pressure monitoring ring 246 can be fed back, received, and processed in real time through an external PLC control system and an external display computer). During the movement of the circumferential gap of another clamping chamber 216 (with the end of the angle rod 225) (relatively stopped for a period of time to sense the contact sealing between the current clamping chamber 216 and the electrode arm 18), when the electrode ring 245 and the pressure monitoring ring 246 maintain a certain value in the contact state for a predetermined time, it is determined that the current clamping chamber 216 is in the extreme point of contact wear between the electrode arm 18 and the welding transformer 17. Under the synchronous action of the bridging ring 247, the two clamping chambers 216 are distributed opposite each other. Then, similarly, the support box 212 is controlled by the electric telescopic rod 211 to drive the clamping chamber 216 to move towards the axis of the angle ring 21 until the clamping chamber 216 and the electrode arm 18 come into contact (through the dynamic friction between the piston 243 and the ring cavity 241 and the elastic potential energy of the telescopic spring 244, the subsequent fluctuation contact between the clamping chamber 216 and the electrode arm 18 is further dynamically optimized, and the relative consistency of the coaxiality of the electrode arm 18 before and after spot welding is improved). When the telescopic rail 28 and the electrode arm 18 move the electrode cap 19 for spot welding, the clamping compartment 216 can provide a certain degree of freedom restriction to the electrode arm 18 while preventing the two from "slipping". Repeat this process until the clamping chamber 216 (with the angle bar 225 end) returns to its initial position (when the machine is stopped to determine if it is not in contact with the electrode arm 18, or when the electrode arm 18 returns and disengages from the clamping chamber 216). At this point, it indicates that the current clamping chamber 216 has reached its calibration limit, and the operator should replace the electrode arm 18 or the partial joint of the welding transformer 17.

[0034] Reference Figure 5 and Figure 13 It is known that the grinding unit 3 includes: a fitting ring 31, which is rotatably mounted on the end of the corner ring 21 near the angle steel beam 1, and the fitting ring 31 extends out of the corner ring 21; a tiger head seat 32, which is detachably mounted on the inner wall of the fitting ring 31 by bolts, with at least three of them, evenly distributed circumferentially; an pole steel plate 33, which is snapped onto the middle position on the side of the tiger head seat 32 near the axis of the fitting ring 31; a telescopic cylinder 34, which is symmetrically snapped onto both ends of the pole steel plate 33; a multi-head clamping seat 35, which is snapped onto the movable end of the telescopic cylinder 34; a temperature control gun 36, which is symmetrically snapped onto the end of the multi-head clamping seat 35 away from the tiger head seat 32; a temperature control valve 37, which is plugged into one end of the temperature control gun 36; and a corner chisel 38, which is snapped onto the middle position of the end of the multi-head clamping seat 35 away from the telescopic cylinder 34. The included angle between the temperature control gun 36 and the corner shovel 38 is at least 100 degrees. In addition, the temperature control gun 36 has an air vent on the sloping side away from the corner shovel 38. The height of the temperature control gun 36 is greater than that of the corner shovel 38. The corner shovel 38 has a double chamfer on the side near the fitting ring 31.

[0035] Grinding unit 3 performs periodic preliminary grinding and thermal runaway management of electrode caps 19 after high-frequency welding: Prerequisite: Occurs when electrode arm 18 drives electrode cap 19 back; The interlocking ring 31 controls the three-point tiger head seat 32 to rotate continuously a predetermined number of times (in specific implementation, the interlocking ring 31 can be driven to move completely under the support of the corner ring 21 by an external electric circular rail, or the interlocking ring 31 can be driven to complete rotation by adding a gear to the outer wall of the interlocking ring 31 and matching it with other meshing gears). During this process, the multi-head chuck 35 is driven by the telescopic cylinder 34 to move towards the axis of the corner ring 21 until the corner shovel 38 (in specific use, the working end of the corner shovel 38 can be set to be elastically connected to itself to break the relatively rigid contact, avoid excessive rigid contact between the corner shovel head and "overly hard" impurities, and improve the service life of the electrode cap 19) comes into contact with the electrode cap 19 (in specific implementation, the telescopic cylinder 34 can be used to gradually feed the interaction depth between the corner shovel 38 and the electrode cap 19 when rotating at a predetermined angle or number of turns). At the same time, the temperature control valve 37 introduces external gas with a certain amount of energy into the temperature control gun 36, and then the temperature control gun 36 blows it in the forward direction to the working area of ​​the electrode cap 19 and the corner shovel 38. On the one hand, this reduces the re-adhesion of cutting debris on the surface of the electrode cap 19 and the corner shovel 38, ensuring the cleanliness of grinding repair and the grinding tool itself; on the other hand, it helps to stabilize and quickly adjust the local temperature of the electrode cap 19, stabilize the preset pressure, and improve the quality and strength of the welding point.

[0036] The working principle of the fully automatic resistance spot welding machine for energy storage cabinet provided by the present invention is as follows: First step: Under the stable support of cylinder seat 13, the pneumatic pressurizing cylinder 14 controls the pressure holding seat 16 to drive the welding transformer 17 on the same end to move towards the angle steel beam 1. At the same time, under the support and guidance of H steel frame 12, the welding transformer 17 on the other side controls the electrode arm 18 to drive the electrode cap 19 to move towards the angle steel beam 1 until the electrode arm 18 is close to the angle steel beam 1 and is directly opposite to the clamping plate 216. Step 2: Next, the support box 212 is controlled by the electric telescopic rod 211 (with one end having the corner rod 225) to move the clamping plate compartment 216 towards the axis of the corner ring 21 until the inner wall of the clamping plate compartment 216 coincides with the outer wall of the electrode arm 18 (the electrode arm 18 is in a predetermined initial position). After that, the platform 23, under the control of the annular guide rail 22, moves the aforementioned clamping plate compartment 216 around the corner ring 21 for at least one revolution. During this process, due to the radial runout of the electrode arm 18, the wear degree of the electrode arm 18 and the welding transformer 17 at different contact points is different. When the clamping plate 216 moves in the circumferential direction, the interaction depth between the electrode arm 18 and the corner pad 218 has a gradient difference at different contact points. At this time, the corner post 214 moves in the opposite direction, and the snake groove 226 and the ejector pin 224 generate different degrees of interaction accumulation until the moving distance of the clamping plate 216 is equal to the current maximum radial runout distance. At the same time, two air valves 219 are connected through an external hose, and gas is introduced into the aforementioned hose through an external air pump until the electrode ring 245 contacts the pressure monitoring ring 246 and maintains a predetermined pressure. After the clamping chamber 216 moves around a certain angle or number of revolutions, when the value between the aforementioned electrode ring 245 and the pressure monitoring ring 246 is maintained at a predetermined value, the current situation is the targeted diagonal clamping of the clamping chamber 216 for the "extreme value" of the radial runout range. Step 3: Finally, under the dual support of the tiger head seat 32 and the pole steel plate 33, the telescopic cylinder 34 controls the multi-head chuck 35 to drive the temperature control gun 36 and the corner shovel 38 to move towards the axis of the corner ring 21 until the corner shovel 38 contacts the outer wall of the electrode cap 19. After that, the electric slider or gear set drives the fitting ring 31 to rotate. Through the relative movement between the corner shovel 38 and the electrode cap 19, the grinding and repair work of the impurities on the outer wall of the electrode cap 19 is performed. The temperature control gun 36 is used to clean the grinding debris in time and quickly suppress the current thermal runaway state of the electrode cap 19.

[0037] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0038] The above are merely embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A fully automatic resistance spot welding machine for energy storage cabinets, comprising two angle steel beams (1) arranged opposite each other, characterized in that: One end of the angle steel beam (1) is provided with an alignment clamping unit (2), and the other end of the alignment clamping unit is provided with a grinding unit (3). The alignment clamping unit (2) includes: Angle ring (21) is snapped and installed at the middle position of one end of angle steel beam (1); The annular guide rail (22) is coaxially snapped and installed at the end of the corner ring (21) away from the angle steel beam (1); The platform (23) consists of two units, which are symmetrically distributed and are installed on the end face of the annular guide rail (22) away from the angle steel beam (1) by sliding and snapping the support column. The end plate (24) is snapped onto the end of the base (23) away from the axis of the corner ring (21); The annular groove (25) is located in the middle of the outer wall of the corner ring (21); Angle arc seat (26) is snapped onto the end of end plate (24) away from the base (23), and the angle arc seat (26) is slidably snapped onto the annular groove (25) for installation; Z-side seat (27) is snap-fitted onto the end of the base (23) away from the end plate (24); The telescopic plate rail (28) is slidably mounted on the Z-side seat (27) at the end away from the platform (23) via a spring rod.

2. The fully automatic resistance spot welding machine for energy storage cabinet body according to claim 1, characterized in that: The telescopic rail (28) is symmetrically fitted with an electric telescopic rod (211) on one end face near the axis of the corner ring (21). The movable ends of the two electric telescopic rods (211) in the same group are fitted with a support box (212). The support box (212) is symmetrically fitted with a layered plate (213) on one end face near the axis of the corner ring (21). The support box (212) is symmetrically fitted with a corner post (214) on one end face away from the electric telescopic rod (211). The corner post (214) is slidably fitted with the layered plate (213). For installation, a return spring (215) is fitted on the outer wall of the corner post (214) between the two layered plates (213) in the same group. The two corner posts (214) in the same group are connected to a clamping plate compartment (216) at the end near the axis of the corner ring (21). A sealing ring (217) is connected to the outer wall of the corner post (214) away from the axis of the corner ring (21). An angle pad (218) is connected to the inner wall of the clamping plate compartment (216). An air valve (219) is plugged into the outer wall of the horizontal section of the support box (212) near the telescopic rail (28).

3. The fully automatic resistance spot welding machine for energy storage cabinet body according to claim 2, characterized in that: One set of two corner posts (214) have an air cavity (221) that communicates with the clamping plate compartment (216) through the axis. The inner wall of the clamping plate compartment (216) on one side of the air cavity (221) is evenly provided with air holes (222) that communicate with the corner pads (218). A shaft seat (223) is snapped onto the outer wall of the sealing ring (217) on one side of the air cavity (221). A pin (224) is snapped onto the middle position of the end face of the shaft seat (223) away from the axis of the sealing ring (217). The middle position of the two layered plates (213) on one side of the air cavity (221) is... An angle rod (225) is symmetrically rotated and installed. A snake groove (226) is opened on the outer wall of the end of the angle rod (225) away from the clamping bin (216). A strip groove (227) connected to the snake groove (226) is opened on the outer wall of the angle rod (225). The length of the strip groove (227) is consistent with the axis of the angle rod (225). An end groove (228) connected to the snake groove (226) is opened on the outer wall of the end of the angle rod (225) close to the clamping bin (216). The end groove (228) is directly opposite to the strip groove (227) and its length is equal to half of the strip groove (227).

4. The fully automatic resistance spot welding machine for energy storage cabinet body according to claim 3, characterized in that: The angle bar (225) has a spline groove (231) on its shaft. A spline rod (232) is installed in sliding engagement with the inner wall of the spline groove (231). A threaded rod (233) is installed in thread engagement with the vertical section of the support box (212) away from the clamping plate (216) on the same side as the layered plate (213).

5. The fully automatic resistance spot welding machine for energy storage cabinet body according to claim 4, characterized in that: The two corner columns (214) of the other group each have an annular cavity (241) at their axis. The inner wall of the annular cavity (241) is symmetrically fitted with a face ring (242). The two face rings (242) in the same group are slidably fitted with a piston (243). The diameter of the end of the piston (243) away from the clamping chamber (216) is equal to the diameter of the annular cavity (241). A telescopic spring (244) is provided between the face rings (242) and sleeved on the outer wall of the piston (243). An electrode ring (245) is fitted with the end of the piston (243) near the axis of the corner ring (21). A pressure monitoring ring (246) corresponding to the electrode ring (245) is fitted with the outer wall of the clamping chamber (216). A bridging ring (247) is fitted with the outer wall of the two pedestals (23).

6. The fully automatic resistance spot welding machine for energy storage cabinet body according to claim 5, characterized in that: The two angle steel beams (1) are connected to a base (11) at the end away from the angle ring (21). An H-beam (12) is connected to the end of the base (11) away from the angle steel beam (1). A cylinder seat (13) is detachably installed at the end of the H-beam (12) away from the direction of gravity by bolts. A pneumatic pressurizing cylinder (14) is connected to the middle position of the end of the cylinder seat (13) away from the H-beam (12), and the movable end of the pneumatic pressurizing cylinder (14) passes through the cylinder seat (13). A housing (15) connected to the ground is snapped onto one end of the cylinder seat (13). A pressure holding seat (16) is snapped onto the movable end of the pneumatic pressurizing cylinder (14). A welding transformer (17) that is slidably snapped onto the end of the pressure holding seat (16) near the angle steel beam (1). An electrode arm (18) is plugged onto the end of the welding transformer (17) away from the H steel frame (12). An electrode cap (19) is snapped onto the end of the electrode arm (18) near the angle steel beam (1).

7. The fully automatic resistance spot welding machine for energy storage cabinet body according to claim 6, characterized in that: The grinding unit (3) includes: The fitting ring (31) is rotatably fitted to one end of the corner ring (21) near the angle steel beam (1), and the fitting ring (31) extends out of the corner ring (21). Tiger head seat (32) is detachably installed on the inner wall of the fitting ring (31) by bolts, and there are at least three of them, which are evenly distributed in the circumference; The steel plate (33) is snapped into the middle position on the side of the tiger head seat (32) near the axis of the fitting ring (31); Telescopic cylinders (34) are symmetrically snapped onto both ends of the pole steel plate (33); A multi-head clamp (35) is clamped and installed at the movable end of the telescopic cylinder (34); The temperature control gun (36) is symmetrically snapped into place at the end of the multi-head socket (35) away from the tiger head seat (32); The temperature control valve (37) is plugged into one end of the temperature control gun (36); The corner shovel (38) is snapped into place at the middle position of the end of the multi-head bracket (35) away from the telescopic cylinder (34).

8. The fully automatic resistance spot welding machine for energy storage cabinet body according to claim 7, characterized in that: The outer diameter of the electrode arm (18) is the same as the inner diameter of the clamping plate compartment (216). The included angle between the temperature control gun (36) and the corner shovel (38) is at least 100 degrees. In addition, the temperature control gun (36) has an air vent on the inclined side away from the corner shovel (38). The height of the temperature control gun (36) is greater than that of the corner shovel (38). The corner shovel (38) has a double chamfer on the side close to the fitting ring (31).

Images