A double-sided automatic spot welding machine for robot manufacturing

Abstract

The application provides a double-sided automatic spot welding machine for robot manufacturing, and relates to the technical field of battery spot welding equipment. The double-sided automatic spot welding machine comprises a welding mounting piece, two spot welding connecting pieces are mounted in the welding mounting piece, the two spot welding connecting pieces are symmetrically mounted, a clamping positioning piece is mounted in the welding mounting piece, the clamping positioning piece is located between the two spot welding connecting pieces, a spot welding device is mounted on each of the two spot welding connecting pieces, a cooling stop piece is mounted on each of the two spot welding devices, and a wear self-checking part is mounted on each of the two spot welding connecting pieces. The spot welding device can automatically polish the end of the welding needle to prevent the end of the welding needle from being continuously thickened by an oxidation layer and affecting the welding quality when the welding needle is extruded and attached to the battery terminal. The double-sided automatic spot welding machine can automatically polish and prevent false connection, and the oxidation layer is easy to be generated after long-term use of the welding needle. The polishing and cleaning period is short.

Description

Technical Field

[0001] This invention relates to the field of battery spot welding equipment technology, and in particular to a double-sided automatic spot welding machine for robot manufacturing. Background Technology

[0002] Among robot components, the battery pack is a crucial power supply unit. A battery pack typically consists of multiple batteries and connecting copper busbars, temporarily positioned and clamped using existing battery pack fixtures before being welded together. This facilitates subsequent modular assembly and installation. Resistance spot welding machines offer advantages such as a small hot zone and are widely used in welding robot battery pack nodes. However, current robot battery pack spot welding machines are not ideal for achieving rapid double-sided welding. Furthermore, traditional spot welding machines do not automatically self-grind the two welding needles to prevent poor connections. Over time, the welding needles are prone to oxide buildup, and manual grinding and cleaning are time-consuming and labor-intensive. Additionally, the wear life of traditional spot welding needles relies on manual inspection and measurement, requiring precise control of the needle extension, which is difficult to monitor automatically. Excessive needle wear directly affects the stability of the weld joint. Summary of the Invention

[0003] This invention relates to a double-sided automatic spot welding machine for robot manufacturing, which solves the problems of current robot battery pack spot welding machines not being able to automatically perform self-grinding to prevent poor connections, the welding needles being prone to oxide layer after long-term use, and the short cycle of manual grinding and cleaning.

[0004] In a first aspect, the present invention provides a double-sided automatic spot welding machine for robot manufacturing, specifically comprising a welding mounting component, wherein two spot welding connectors are installed inside the welding mounting component; the two spot welding connectors are symmetrically installed; a clamping and positioning component is installed inside the welding mounting component; the clamping and positioning component is used to control the displacement of a battery pack; the clamping and positioning component is located between the two spot welding connectors; spot welding devices are respectively installed on the two spot welding connectors; the spot welding devices are used to prevent poor connections; cooling stop components are respectively installed on the two spot welding devices; wear self-inspection units are respectively installed on the two spot welding connectors; the wear self-inspection units are used to self-inspect wear; the welding mounting component includes: a welding cabinet, a mounting platform, and a relay; a welding machine controller is provided on the welding cabinet; the mounting platform is fixedly installed inside the welding cabinet; and a relay is fixedly installed on the mounting platform.

[0005] Preferably, the welding mounting component further includes: a tray and a welding machine body, wherein the tray is fixedly mounted on the welding cabinet; the tray is higher than the mounting platform; two welding machine bodies are fixedly mounted inside the welding cabinet; the two welding machine bodies are electrically connected to the welding machine controller on the welding cabinet; four support legs are fixedly mounted at the bottom of the welding cabinet; and the two welding machine bodies are electrically connected to a relay.

[0006] Preferably, the spot welding connector includes: a lifting mounting shell, a lifting drive electric cylinder, a lifting slider, a spot welding mounting plate, and a spot welding electric cylinder. The lifting mounting shell is fixedly mounted on the mounting platform; the lifting drive electric cylinder is fixedly mounted on the bottom of the mounting platform; the output shaft of the lifting drive electric cylinder passes through the mounting platform and the lifting mounting shell; a lifting slider is slidably mounted inside the lifting mounting shell; the output shaft of the lifting drive electric cylinder is fixedly mounted on the bottom of the lifting slider; a spot welding mounting plate is fixedly mounted on the lifting slider; the spot welding electric cylinder is fixedly mounted on the spot welding mounting plate; and the output shaft of the spot welding electric cylinder passes through the spot welding mounting plate.

[0007] Preferably, the clamping and positioning component includes: a mounting rail, a movable bracket, a bracket electric cylinder, an electric cylinder mounting plate, a lower pressure plate, and a lower pressure electric cylinder. The mounting rail is fixedly mounted on the mounting platform; a through groove is provided on the mounting rail; a movable bracket is slidably mounted on the mounting rail; the bottom of the movable bracket passes through the through groove in the middle of the mounting rail; the movable bracket has an L-shaped structure; a bracket electric cylinder is fixedly mounted on the bottom of the mounting rail; the output shaft of the bracket electric cylinder is fixedly mounted on the movable bracket; an electric cylinder mounting plate is fixedly mounted on the movable bracket; the electric cylinder mounting plate and the movable bracket are respectively provided with grooves for inserting battery pack clamps; the lower pressure plate is slidably mounted on the electric cylinder mounting plate via two sliding shafts; the lower pressure plate is used to press and clamp the battery pack clamp; a lower pressure electric cylinder is fixedly mounted on the electric cylinder mounting plate, and the output shaft of the lower pressure electric cylinder is fixedly mounted on the lower pressure plate.

[0008] Preferably, the spot welding device includes: a spot welding insulating block, a spot welding mounting sleeve, a guide shaft, and a push spring. The spot welding insulating block is slidably mounted on the spot welding mounting plate. The spot welding insulating block is fixedly mounted on the output shaft of the spot welding electric cylinder. Two spot welding mounting sleeves are rotatably sleeved on the spot welding insulating block. Two guide shafts are fixedly mounted on the inner side of the spot welding insulating block, and the tails of the two spot welding mounting sleeves are slidably sleeved on the two guide shafts respectively. Push springs are respectively sleeved on the two guide shafts. The ends of the push springs are connected to the tails of the spot welding mounting sleeves.

[0009] Preferably, the spot welding device further includes: a guide slot block, a shaft bracket, a toggle shaft, a welding needle, and a positioning bolt. Two guide slot blocks are electrically connected to the welding machine body on the same side. Guide slot blocks are fixedly installed on each of the two spot welding mounting sleeves, and the outer sides of the two guide slot blocks are arc-shaped structures. A spiral groove is provided on the outer side of each guide slot block. The guide slot block abuts against the inner side of the spot welding insulating block. Two shaft brackets are fixedly installed on the inner side of the spot welding insulating block by bolts, and a toggle shaft is fixedly installed on each of the two shaft brackets. The bottom of the toggle shaft has a hemispherical structure. The bottom of the toggle shaft is inserted into the spiral groove on the outer side of the guide slot block. Welding needles are inserted into each of the two spot welding mounting sleeves. The two guide slot blocks are electrically connected to welding needles on the same side. Positioning bolts are threaded onto each of the two spot welding mounting sleeves, and the ends of the positioning bolts are pressed against the outer side of the welding needle.

[0010] Preferably, the cooling stop component includes: a stop oil passage cylinder and a connecting oil pipe, with the stop oil passage cylinder respectively fitted on the two welding needles; both stop oil passage cylinders have a hollow cavity structure inside; the end of the welding needle protrudes from the end of the stop oil passage cylinder; the two stop oil passage cylinders are respectively fixedly connected to the ends of two spot-welded mounting sleeves; a connecting oil pipe is fixedly installed on the two stop oil passage cylinders; the two connecting oil pipes are respectively connected to a cooling oil inlet pipe and an oil outlet pipe.

[0011] Preferably, the cooling stop further includes a connecting pipe, which is fixedly installed on the two stop oil cylinders; the connecting pipe connects to the inner cavity of the two stop oil cylinders.

[0012] Preferably, the wear self-inspection unit includes: a detection slider and laser ranging switches. The detection slider is slidably mounted on the spot welding mounting plate. Two laser ranging switches are fixedly mounted on the detection slider. The laser points of the two laser ranging switches are respectively aligned with the outer sides of the two welding pins. The two laser ranging switches are respectively located below the tray. The four laser ranging switches are electrically connected to a relay.

[0013] Preferably, the wear self-inspection unit further includes: an electric cylinder mounting block and a distance measuring drive electric cylinder, wherein the electric cylinder mounting block is fixedly mounted on the spot welding mounting plate; the distance measuring drive electric cylinder is fixedly mounted on the electric cylinder mounting block, and the output shaft of the distance measuring drive electric cylinder passes through the electric cylinder mounting block; the output shaft of the distance measuring drive electric cylinder is fixedly mounted on the detection slider; the lifting height of the detection slider is less than the diameter of the welding needle.

[0014] This invention provides a double-sided automatic spot welding machine for robot manufacturing, which has the following advantages: This invention employs two sets of spot welding connectors to achieve simultaneous welding of the battery pack on both sides, resulting in higher efficiency. The spot welding device automatically grinds and cleans the tip of the welding needle as it presses against the battery terminal, preventing the oxide layer at the tip of the welding needle from continuously thickening and affecting the welding quality. This also prevents the problem of incomplete connections during welding. This structure extends the manual grinding and finishing cycle and increases spot welding output through self-grinding. This structure utilizes the rotation of the welding needle as it presses against the battery terminal to achieve automatic grinding through friction with the battery terminal.

[0015] In addition, the cooling stop can be used to cool and heat exchange the welding needle, preventing the welding needle temperature from exceeding the limit and causing problems such as welding adhesion. This ensures the welding performance of the welding needle. At the same time, the structure uses the end of the welding needle to protrude from the end of the stop oil tube, which can limit the exposed length of the welding needle. When the welding needle is resistively welded to the battery terminal, the stop oil tube can be used to stop it on the outside of the battery terminal, preventing the welding needle from sinking too much into the weld joint due to the softening of the battery terminal during resistance welding. This ensures that the weld joint is formed to standard.

[0016] In addition, the wear self-inspection unit can be used to monitor the wear of the welding needle in real time. When the wear of the welding needle exceeds the standard, or when the wear of the length of the protruding oil passage at the front end of the stop exceeds the standard, it will automatically provide an early warning. This can prevent the welding needle from being unable to effectively press and adhere to the battery terminal for welding when it is worn too much. This structure uses a laser non-contact monitoring method in conjunction with a distance-measuring drive cylinder to control the laser distance-measuring switch to adjust the height, which can improve the monitoring range. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0018] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0019] In the attached diagram: Figure 1 A schematic diagram of the overall structure of a double-sided automatic spot welding machine for robot manufacturing according to this application is shown; Figure 2 This invention provides a schematic diagram showing the battery pack fixture placed inside a double-sided automatic spot welding machine for robot manufacturing. Figure 3 A schematic diagram of the welding mounting structure of this application is shown; Figure 4 A schematic diagram of the spot-welded connector structure of this application is shown; Figure 5 A schematic diagram showing the installation position of the lifting slider in this application is provided; Figure 6A schematic diagram of the clamping and positioning component structure of this application is shown; Figure 7 This application shows Figure 3 Enlarged view of the structure of region A in the middle; Figure 8 A schematic diagram of the spot welding device structure of this application is shown; Figure 9 This application shows Figure 1 Enlarged view of the structure of region B in the middle; Figure 10 This application shows Figure 4 Enlarged view of the structure of region C in the middle.

[0020] List of reference numerals 1. Welding installation components; 101. Welding cabinet; 1011. Installation platform; 1012. Relay; 102. Tray; 103. Welding machine body; 2. Spot welding connectors; 201. Lifting mounting shell; 202. Lifting drive cylinder; 203. Lifting slider; 204. Spot welding mounting plate; 205. Spot welding cylinder; 3. Clamping and positioning components; 301. Installation track; 302. Moving bracket; 303. Bracket cylinder; 304. Cylinder mounting plate; 305. Lower pressure plate; 306. Lower pressure cylinder; 4. Spot welding device; 401. Spot welding insulating block; 402. Spot welding mounting sleeve; 4021. Guide shaft; 4022. Push spring; 403. Guide groove block; 404. Shaft bracket; 4041. Actuating shaft; 405. Welding needle; 4051. Positioning bolt; 5. Cooling stop; 501. Stop oil pipe; 502. Connecting oil pipe; 503. Connecting pipe; 6. Wear self-inspection unit; 601. Detection slider; 602. Laser rangefinder switch; 603. Electric cylinder mounting block; 604. Rangefinder drive electric cylinder. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. Based on the described 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.

[0022] Example 1: Please refer to Figures 1 to 10 : This invention proposes a double-sided automatic spot welding machine for robot manufacturing, comprising a welding mounting component 1, inside which two spot welding connectors 2 are installed; the two spot welding connectors 2 are symmetrically installed; a clamping and positioning component 3 is installed inside the welding mounting component 1; the clamping and positioning component 3 is used to control the displacement of the battery pack; the clamping and positioning component 3 is located between the two spot welding connectors 2; spot welding devices 4 are respectively installed on the two spot welding connectors 2; the spot welding devices 4 are used to prevent poor connections; cooling stop components 5 are respectively installed on the two spot welding devices 4; wear self-inspection units 6 are respectively installed on the two spot welding connectors 2; the wear self-inspection units 6 are used to self-inspect wear; the welding mounting component 1 includes: a welding cabinet 101, a mounting platform 1011, and a relay 1012; a welding machine controller is provided on the welding cabinet 101; the mounting platform 1011 is fixedly installed inside the welding cabinet 101; the relay 1012 is fixedly installed on the mounting platform 1011.

[0023] In this embodiment of the invention, the welding mounting component 1 further includes: a tray 102 and a welding machine body 103. The tray 102 is fixedly mounted on the welding cabinet 101; the tray 102 is higher than the mounting platform 1011; two welding machine bodies 103 are fixedly mounted inside the welding cabinet 101; the two welding machine bodies 103 are electrically connected to the welding machine controller on the welding cabinet 101 respectively; four support legs are fixedly mounted at the bottom of the welding cabinet 101; the two welding machine bodies 103 are electrically connected to the relay 1012; the spot welding connector 2 includes: a lifting mounting shell 201, a lifting drive cylinder 202, a lifting slider 203, a spot welding mounting plate 204, and a spot welding cylinder 205. The lifting mounting shell 201 is fixedly mounted on the welding machine body 101. Mounted on the mounting platform 1011; the lifting drive electric cylinder 202 is fixedly mounted on the bottom of the mounting platform 1011; the output shaft of the lifting drive electric cylinder 202 passes through the mounting platform 1011 and the lifting mounting shell 201; a lifting slider 203 is slidably mounted inside the lifting mounting shell 201; the output shaft of the lifting drive electric cylinder 202 is fixedly mounted on the bottom of the lifting slider 203; a spot welding mounting plate 204 is fixedly mounted on the lifting slider 203; a spot welding electric cylinder 205 is fixedly mounted on the spot welding mounting plate 204; the output shaft of the spot welding electric cylinder 205 passes through the spot welding mounting plate 204; the clamping and positioning component 3 includes: a mounting rail 301, a movable bracket 302, a bracket electric cylinder 303, and an electric cylinder mounting plate 301. 4. The lower pressure plate 305 and the lower pressure electric cylinder 306 are fixedly installed on the mounting platform 1011 via the mounting rail 301; a through groove is provided on the mounting rail 301; a movable bracket 302 is slidably installed on the mounting rail 301; the bottom of the movable bracket 302 passes through the through groove in the middle of the mounting rail 301; the movable bracket 302 has an L-shaped structure; a bracket electric cylinder 303 is fixedly installed at the bottom of the mounting rail 301; the output shaft of the bracket electric cylinder 303 is fixedly installed on the movable bracket 302; an electric cylinder mounting plate 304 is fixedly installed on the movable bracket 302; the electric cylinder mounting plate 304 and the movable bracket 302 are respectively provided with grooves for inserting battery pack clamps; the lower pressure plate 305 is connected by two sliding shafts. The battery pack fixture is slidably mounted on the cylinder mounting plate 304; the lower pressure plate 305 is used to press and clamp the battery pack fixture; the lower pressure cylinder 306 is fixedly mounted on the cylinder mounting plate 304, and the output shaft of the lower pressure cylinder 306 is fixedly mounted on the lower pressure plate 305; the clamping and positioning component 3 can stably clamp the battery pack fixture, making it easy and quick for workers to clamp, and can control the front and rear displacement of the battery pack. With the spot welding connector 2, the height of the welding needle 405 can be adjusted by raising and lowering, and the welding needle 405 can be pushed to perform efficient spot welding. At the same time, the structure is equipped with two sets of spot welding connectors 2 on the left and right sides, which can realize the synchronous welding of the battery pack on both sides, which is more efficient. The structure uses resistance welding, which has a small heat zone impact and the weld is aesthetically pleasing.

[0024] In this embodiment of the invention, the spot welding device 4 includes: a spot welding insulating block 401, a spot welding mounting sleeve 402, a guide shaft 4021, and a push spring 4022. The spot welding insulating block 401 is slidably mounted on the spot welding mounting plate 204; the spot welding insulating block 401 is fixedly mounted on the output shaft of the spot welding electric cylinder 205; two spot welding mounting sleeves 402 are rotatably sleeved on the spot welding insulating block 401; two guide shafts 4021 are fixedly mounted on the inner side of the spot welding insulating block 401, and the tails of the two spot welding mounting sleeves 402 are slidably sleeved on the two guide shafts 4021 respectively; and two guide shafts 4021 are respectively sleeved on the two guide shafts 4021. A push spring 4022 is provided; the end of the push spring 4022 is connected to the tail of the spot welding mounting sleeve 402; the spot welding device 4 also includes: a guide groove block 403, a shaft frame 404, a turning shaft 4041, a welding needle 405, and a positioning bolt 4051. The two guide groove blocks 403 are electrically connected to the welding machine body 103 on the same side; guide groove blocks 403 are fixedly installed on the two spot welding mounting sleeves 402 respectively, and the outer sides of the two guide groove blocks 403 are arc-shaped structures; the outer side of the guide groove block 403 is provided with a spiral groove; the guide groove block 403 abuts against the inner side of the spot welding insulating block 401; the spot welding insulating block 401... Two shaft brackets 404 are fixedly installed on the inner side of 01 by bolts, and actuating shafts 4041 are fixedly installed on the two shaft brackets 404 respectively; the bottom of the actuating shaft 4041 is a hemispherical structure; the bottom of the actuating shaft 4041 is inserted into the spiral groove on the outer side of the guide slot block 403; welding needles 405 are respectively inserted into the two spot welding mounting sleeves 402; the two guide slot blocks 403 are electrically connected to the welding needles 405 on the same side respectively; positioning bolts 4051 are threadedly connected to the two spot welding mounting sleeves 402 respectively, and the ends of the positioning bolts 4051 are pressed against the outer side of the welding needles 405; the spot welding device 4 can be used to This structure enables automatic grinding and self-cleaning of the welding needle 405 end during the pressing and bonding of the welding needle 405 to the battery terminal. This prevents the oxide layer at the end of the welding needle 405 from continuously thickening, which would affect the welding quality and prevent the problem of incomplete connection during welding. This structure extends the manual grinding and finishing cycle and increases spot welding output through self-grinding. This structure utilizes the rotation of the welding needle 405 as it presses and bonds to the battery terminal, and the friction between the welding needle 405 and the battery terminal performs automatic grinding. The structure is simple to control, and the automatic rotation and grinding of the welding needle 405 can be achieved by using the spiral groove on the outer side of the guide block 403.

[0025] Cooling stop component 5 includes: a stop oil passage cylinder 501 and a connecting oil pipe 502. The stop oil passage cylinder 501 is respectively fitted onto two welding needles 405. Both stop oil passage cylinders 501 have a hollow cavity structure. The ends of the welding needles 405 protrude from the ends of the stop oil passage cylinders 501. The two stop oil passage cylinders 501 are respectively fixedly connected to the ends of two spot-welded mounting sleeves 402. Connecting oil pipes 502 are respectively fixedly installed on the two stop oil passage cylinders 501. The two connecting oil pipes 502 are respectively connected to a cooling oil inlet pipe and an oil outlet pipe. Cooling stop component 5 also includes: a connecting pipe 503, which is fixedly installed on the two stop oil passage cylinders 501. 3. The inner cavities of the two stop oil cylinders 501 are connected; the cooling stop 5 can be used to cool and heat exchange the welding needle 405, avoiding the welding needle 405 temperature from exceeding the standard and causing welding adhesion and other problems. It can ensure the welding performance of the welding needle 405. At the same time, this structure uses the end of the welding needle 405 protruding from the end of the stop oil cylinder 501 to limit the exposed length of the welding needle 405. When the welding needle 405 is resistively welded to the battery terminal, the stop oil cylinder 501 can stop it on the outside of the battery terminal, preventing the welding needle 405 from sinking too much into the weld point due to the softening of the battery terminal during resistance welding. It can ensure the standard weld point formation and the structure is simple to control.

[0026] In Example 2, based on Example 1, the wear self-inspection unit 6 includes: a detection slider 601 and laser rangefinder switches 602. The detection slider 601 is slidably mounted on the spot welding mounting plate 204; two laser rangefinder switches 602 are fixedly mounted on the detection slider 601; the laser points of the two laser rangefinder switches 602 are respectively aligned with the outer sides of the two welding pins 405; the two laser rangefinder switches 602 are respectively located below the tray 102; the four laser rangefinder switches 602 are electrically connected to the relay 1012; the wear self-inspection unit 6 also includes: an electric cylinder mounting block 603 and a rangefinder drive electric cylinder 604. The electric cylinder mounting block 603 is fixedly mounted on the spot welding mounting plate 204; the rangefinder drive electric cylinder 604 is fixedly mounted on the electric cylinder mounting block 603, and the rangefinder drive electric cylinder... The output shaft of the 604 passes through the electric cylinder mounting block 603; the output shaft of the ranging drive electric cylinder 604 is fixedly mounted on the detection slider 601; the lifting height of the detection slider 601 is less than the diameter of the welding needle 405; the wear self-inspection unit 6 can be used to monitor the wear of the welding needle 405 in real time. When the wear of the welding needle 405 exceeds the standard and the wear of the length of the protruding stop oil cylinder 501 exceeds the standard, an automatic warning monitoring is performed, which can avoid the problem that the welding needle 405 cannot effectively press and adhere to the battery terminal for welding when the welding needle 405 is worn excessively. This structure uses laser non-contact monitoring in conjunction with the ranging drive electric cylinder 604 to control the laser ranging switch 602 to adjust the height, which can improve the monitoring range and is more suitable for welding needles 405 with larger diameters.

[0027] The working principle of this embodiment is as follows: When welding is required, the battery pack clamp holding the battery and connecting copper busbar is first placed in the groove on the movable bracket 302. Then, the lowering cylinder 306 is controlled to push the lowering plate 305 to press down and clamp the battery pack clamp. Then, under the automatic control of the program, the movable bracket 302 is driven to move back and forth by the bracket cylinder 303, which moves the battery pack clamp. The lifting drive cylinder 202 drives the lifting slider 203 to rise and fall, which moves the welding needle 405 to adjust its height. The spot welding cylinder 205 pushes the spot welding insulating block 401 forward, which causes the welding needle 405 to press and adhere to the battery terminal. When the welding needle 405 is controlled to contact the battery terminal, the welding needle 405 abuts against the battery terminal. At this time, the spot welding cylinder 205 will drive the spot welding insulating block 401 to continue to move forward. The welding needle 405 can retract, causing the spot welding mounting sleeve 402 to move backward and compress the push spring 4022. During this process, the welding needle 405 is in close contact with the battery terminal. When the spot welding mounting sleeve 402 moves backward, it will drive the guide groove block 403 to move backward as well. At this time, the position of the actuating shaft 4041 remains unchanged. Under the guidance of the spiral groove on the guide groove block 403, the actuating shaft 4041 can move the guide groove block 403 to drive the welding needle 405 to rotate. At this time, the end of the welding needle 405 will rub against the battery terminal to achieve self-cleaning grinding. As the push spring 4022 is fully compressed, after the spot welding cylinder 205 is at its maximum stroke, the welding machine body 103 can control the welding needle 405 to be energized to perform resistance spot welding. In this way, the various welding nodes of the battery in the battery pack fixture can be welded. When the welding needle 405 is energized for resistance welding, the weld joint softens. At this time, under the compression of the push spring 4022, the end of the welding needle 405 is likely to directly sink into the weld joint of the battery terminal, forming a pit at the weld joint. The diameter of the stop oil cylinder 501 is larger than that of the welding needle 405, so it can stop the welding needle 405 on the outside of the battery terminal to prevent it from sinking into the weld joint to an excessive depth. At the same time, during the welding process, cooling oil is introduced into the lower connecting oil pipe 502 and discharged from the upper connecting oil pipe 502. Cooling oil flows in real time in the two stop oil cylinders 501 during the process to cool the welding needle 405. When the wear of the welding needle 405 is within the normal range, the laser spot of the laser rangefinder switch 602 will be blocked by the end of the welding needle 405, and can only be projected on the outside of the welding needle 405, and cannot be directly projected to the inside of the tray 102. However, with long-term welding, the wear of the end of the welding needle 405 exceeds the standard. At this time, the front end of the welding needle 405 shortens and can no longer block the laser. At this time, the laser of the laser rangefinder switch 602 will be directly projected on the inside of the tray 102. When the laser rangefinder switch 602 detects the calibrated distance, it can control the relay 1012 to cut off the power. At this time, the welding machine body 103 can be powered off and stopped, prompting the staff to adjust and replace the welding needle 405 in time before continuing the welding work.

[0028] The following points should be noted in this article: 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0029] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0030] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A double-sided automatic spot welding machine for robot manufacturing, comprising a welding mounting component (1), wherein two spot welding connectors (2) are installed inside the welding mounting component (1); characterized in that: The two spot-welded connectors (2) are symmetrically installed; a clamping and positioning component (3) is installed inside the welding mounting component (1); the clamping and positioning component (3) is located between the two spot-welded connectors (2); A spot welding device (4) is installed on each of the two spot welding connectors (2); a cooling stop (5) is installed on each of the two spot welding devices (4); Wear self-inspection unit (6) is installed on each of the two spot welded connectors (2); The welding mounting component (1) includes: a welding cabinet (101), a mounting platform (1011), a relay (1012), and a welding machine body (103). The welding cabinet (101) is equipped with a welding machine controller. The mounting platform (1011) is fixedly installed inside the welding cabinet (101). The relay (1012) is fixedly installed on the mounting platform (1011). The spot welding device (4) includes: a spot welding insulating block (401), a spot welding mounting sleeve (402), a guide groove block (403), a shaft bracket (404), a turning shaft (4041), and a welding needle (405). The two guide groove blocks (403) are electrically connected to the welding machine body (103) on the same side. The guide groove blocks (403) are fixedly installed on the two spot welding mounting sleeves (402). The outer side of the guide groove block (403) is provided with a spiral groove. The guide groove block (403) abuts against the spot welding insulating block (404). 01) Inner side; Two shaft brackets (404) are fixedly installed on the inner side of the spot welding insulating block (401) by bolts, and a toggle shaft (4041) is fixedly installed on the two shaft brackets (404); The bottom of the toggle shaft (4041) is inserted into the spiral groove on the outer side of the guide slot block (403); Welding needles (405) are respectively inserted into the two spot welding mounting sleeves (402); When the welding needle (405) is pressed and attached to the battery terminal, the spot welding device (4) automatically grinds and cleans the end of the welding needle (405); The cooling stop component (5) includes: a stop oil passage cylinder (501) and a connecting oil pipe (502). The two welding needles (405) are respectively fitted with stop oil passage cylinders (501); the two stop oil passage cylinders (501) are hollow cavity structures; the end of the welding needle (405) protrudes from the end of the stop oil passage cylinder (501); the two stop oil passage cylinders (501) are respectively fixedly connected to the ends of two spot welding mounting sleeves (402); the two stop oil passage cylinders (501) are respectively fixedly installed with connecting oil pipes (502). The cooling stop (5) further includes a connecting pipe (503), which is fixedly installed on the two stop oil cylinders (501); the connecting pipe (503) connects to the inner cavity of the two stop oil cylinders (501).

2. The double-sided automatic spot welding machine for robot manufacturing according to claim 1, characterized in that, The welding mounting component (1) further includes: a tray (102), on which the welding cabinet (101) is fixedly mounted; two welding machine bodies (103) are fixedly mounted inside the welding cabinet (101); the two welding machine bodies (103) are electrically connected to the welding machine controller on the welding cabinet (101); the two welding machine bodies (103) are electrically connected to a relay (1012).

3. The double-sided automatic spot welding machine for robot manufacturing according to claim 2, characterized in that, The spot welding connector (2) includes: a lifting mounting shell (201), a lifting drive cylinder (202), a lifting slider (203), a spot welding mounting plate (204), and a spot welding cylinder (205). The lifting mounting shell (201) is fixedly mounted on the mounting platform (1011). The lifting drive cylinder (202) is fixedly mounted on the bottom of the mounting platform (1011). The output shaft of the lifting drive cylinder (202) passes through the mounting platform (1011) and the lifting mounting shell (201). The lifting slider (203) is slidably mounted on the inner side of the lifting mounting shell (201). The output shaft of the lifting drive cylinder (202) is fixedly mounted on the bottom of the lifting slider (203). The spot welding mounting plate (204) is fixedly mounted on the lifting slider (203). The spot welding cylinder (205) is fixedly mounted on the spot welding mounting plate (204).

4. The double-sided automatic spot welding machine for robot manufacturing according to claim 1, characterized in that, The clamping and positioning component (3) includes: an installation rail (301), a movable bracket (302), a bracket electric cylinder (303), an electric cylinder mounting plate (304), a pressure plate (305), and a pressure electric cylinder (306). The installation rail (301) is fixedly installed on the installation platform (1011). A through groove is provided on the installation rail (301). The movable bracket (302) is slidably installed on the installation rail (301). The bottom of the movable bracket (302) passes through the through groove in the middle of the installation rail (301). The bracket is fixedly installed at the bottom of the installation rail (301). Electric cylinder (303); the output shaft of the bracket electric cylinder (303) is fixedly mounted on the movable bracket (302); an electric cylinder mounting plate (304) is fixedly mounted on the movable bracket (302); the electric cylinder mounting plate (304) and the movable bracket (302) are respectively provided with grooves for inserting battery pack clamps; the lower pressure plate (305) is slidably mounted on the electric cylinder mounting plate (304) through two sliding shafts; a lower pressure electric cylinder (306) is fixedly mounted on the electric cylinder mounting plate (304), and the output shaft of the lower pressure electric cylinder (306) is fixedly mounted on the lower pressure plate (305).

5. A double-sided automatic spot welding machine for robot manufacturing according to claim 3, characterized in that, The spot welding device (4) further includes: a guide shaft (4021) and a push spring (4022). The spot welding insulating block (401) is slidably mounted on the spot welding mounting plate (204). The spot welding insulating block (401) is fixedly mounted on the output shaft of the spot welding electric cylinder (205). Two spot welding mounting sleeves (402) are rotatably sleeved on the spot welding insulating block (401). Two guide shafts (4021) are fixedly mounted on the inner side of the spot welding insulating block (401), and the tails of the two spot welding mounting sleeves (402) are slidably sleeved on the two guide shafts (4021). Push springs (4022) are respectively sleeved on the two guide shafts (4021). The end of the push spring (4022) is connected to the tail of the spot welding mounting sleeve (402).

6. A double-sided automatic spot welding machine for robot manufacturing according to claim 5, characterized in that, The spot welding device (4) further includes: a positioning bolt (4051), the bottom of the actuating shaft (4041) is a hemispherical structure; the two spot welding mounting sleeves (402) are respectively threaded with positioning bolts (4051), and the ends of the positioning bolts (4051) are pressed and attached to the outside of the welding needle (405).

7. A double-sided automatic spot welding machine for robot manufacturing according to claim 6, characterized in that, The wear self-inspection unit (6) includes: a detection slider (601) and a laser rangefinder switch (602). The detection slider (601) is slidably mounted on the spot welding mounting plate (204). Two laser rangefinder switches (602) are fixedly mounted on the detection slider (601). The laser points of the two laser rangefinder switches (602) are respectively aligned with the outer sides of the two welding pins (405). The four laser rangefinder switches (602) are electrically connected to a relay (1012).

8. A double-sided automatic spot welding machine for robot manufacturing according to claim 7, characterized in that, The wear self-inspection unit (6) further includes: an electric cylinder mounting block (603) and a distance measuring drive electric cylinder (604). The electric cylinder mounting block (603) is fixedly mounted on the spot welding mounting plate (204). The distance measuring drive electric cylinder (604) is fixedly mounted on the electric cylinder mounting block (603). The output shaft of the distance measuring drive electric cylinder (604) is fixedly mounted on the detection slider (601).

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