A contour welding device with rapid clamping and positioning function

Abstract

This invention discloses a contour welding device with rapid clamping and positioning function, belonging to the field of welding equipment technology. It includes a machine base, a column, welding fixtures, and a can lid and valve body to be welded. The column is mounted on the machine base, which has a positioning groove. The welding fixture includes a can lid positioning fixture and a valve body positioning fixture. The can lid positioning fixture is bolted to the positioning groove. A lifting platform is mounted on the column, and a positioning component and a welding machine are installed on the lifting platform. The valve body positioning fixture includes a valve seat and a valve pressure rod. The valve seat is mounted on the can lid positioning fixture, and the valve pressure rod is mounted at the bottom of the positioning component. The welding fixtures used in the welding equipment can be replaced and installed as needed. The operator first places the valve body to be welded on the valve seat, and then places the can lid on the can lid positioning fixture until the valve pressure rod contacts the valve body, indicating that the welding machine is in the welding position.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically a contour welding device with rapid clamping and positioning function. Background Technology

[0002] With the increasing demands for welding quality and efficiency in modern manufacturing, contour welding equipment, due to its ability to adaptively weld according to the workpiece contour, is widely used in the welding of complex structural parts in automobile manufacturing, pressure vessels, and other fields. However, existing contour welding equipment still faces significant technical bottlenecks in the clamping and positioning process. The position and clamping angle of the clamps need to be repeatedly adjusted for the workpiece. According to process calculations, the clamping time for a single workpiece generally exceeds 40% of the welding process time. This not only prolongs auxiliary time but also makes it prone to positioning deviations due to human factors. Although some existing patents disclose some rapid positioning functions, their contour positioning modules still rely on the replacement of preset templates. "One machine, one shape, one weld" is one of the pain points of the equipment, which cannot adapt to the randomly changing surface features of the workpiece. Therefore, developing a welding equipment with rapid adaptive clamping and positioning has important engineering value for improving the intelligence level and process stability of welding production lines. Summary of the Invention

[0003] The purpose of this invention is to provide a contour welding device with rapid clamping and positioning function to solve the problems raised in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a contour welding device with rapid clamping and positioning function, comprising a machine base, a column, welding fixtures, and a can lid and a valve body to be welded. The column is mounted on the machine base, and a positioning groove is provided on the machine base. The welding fixture includes a can lid positioning fixture and a valve body positioning fixture. The can lid positioning fixture is bolted to the positioning groove. A lifting platform is provided on the column, and a positioning component and a welding machine are mounted on the lifting platform. The valve body positioning fixture includes a valve seat and a valve pressure rod. The valve seat is mounted on the can lid positioning fixture, and the valve pressure rod is mounted at the bottom of the positioning component. The welding fixtures used in the welding device can be replaced and installed as needed. The operator first places the valve body to be welded on the valve seat, and then places the can lid on the can lid positioning fixture. After the preparation is completed, the lifting platform drives the welding machine to descend until the valve pressure rod contacts the valve body. The pressure sensor detects the pressure signal, and the lifting platform stops moving, indicating that the welding machine is in the welding position.

[0005] Furthermore, an electric push rod is installed inside the column, and the piston rod of the electric push rod is connected to the lifting platform. The lifting platform is slidably installed on the column. A servo motor and a reducer are installed above the lifting platform. The motor shaft of the servo motor is connected to the input end of the reducer. The positioning component includes a centering shaft, and the output end of the reducer is connected to the centering shaft. The centering shaft passes through the lifting platform.

[0006] Furthermore, a replaceable contouring cam is installed at the bottom of the lifting platform. The centering shaft passes through the middle of the contouring cam. The air nozzle pressure rod is connected to the bottom of the centering shaft. A pressure sensor is installed between the air nozzle pressure rod and the centering shaft. The air nozzle pressure rod is a two-section adapter rod structure. A spline groove is opened in the middle section of the centering shaft. A sliding cantilever is slidably installed on the spline shaft. The welding machine is slidably installed on the sliding cantilever. A spring is installed between the side of the welding machine away from the centering shaft and the sliding cantilever. An electric push rod drives the lifting platform to move up and down. A servo motor drives the reducer to work. The reducer drives the centering shaft to rotate. The centering shaft drives the sliding cantilever to rotate through the spline groove. The spring keeps the welding machine in contact with the contouring cam through the pushing force. Under the drive of the centering shaft, the welding machine rotates around the contouring cam.

[0007] Furthermore, the welding machine is equipped with a transfer bracket on top, on which a driven wheel is rotatably mounted. A contouring annular groove is formed on the outer contour of the contouring cam. The driven wheel rolls in contact with the lower edge of the contouring annular groove. The contour of the contouring annular groove coincides with the welding trajectory. As the driven wheel rolls along the contouring annular groove, the welding machine can move along a fixed welding trajectory to weld the can lid and valve body.

[0008] Furthermore, the can lid positioning fixture includes a conical platform and a sliding seat. The conical platform is hollow inside, and a sliding column is vertically arranged at the center of the conical platform. The sliding seat is slidably mounted on the sliding column. A return spring is arranged between the bottom of the sliding seat and the lower inner wall of the conical platform. The air nozzle seat is mounted on the top of the conical platform.

[0009] Furthermore, the sliding seat is provided with at least three clamping arms, which are evenly distributed in a circular pattern on the sliding seat. The conical wall of the conical platform has through slots with the same number of clamping arms. The clamping arms pass through the through slots. When placing the can lid, the operator aligns the hole on the can lid with the valve body and places it on the clamping arm. The weight of the can lid overcomes the pushing force of the return spring on the sliding seat. Under the action of gravity, the clamping arm descends. Since the side of the conical platform is a conical surface, the can lid slides and contacts the conical surface during the descent until the bottom edge of the can lid contacts the conical surface of the conical platform. At this time, the center line of the can lid and the center line of the conical platform are completely coincident, realizing the automatic centering of the can lid on the fixture, avoiding the error of manual positioning, saving clamping time, and improving the clamping efficiency of the fixture.

[0010] Furthermore, each clamping arm is slidably equipped with a clamping slider, and a nut is provided at the bottom of the clamping slider. A screw is rotatably mounted at the bottom of the clamping arm, and the nut is threadedly connected to the screw. A driven bevel gear is installed on the side of the screw near the sliding seat. A hollow cup motor is installed on the sliding seat, and a driving bevel gear is connected to the hollow cup motor. The driving bevel gear meshes with all the driven bevel gears. The control system energizes the hollow cup motor, which drives the driving bevel gear to rotate. The driving bevel gear drives all the driven bevel gears to rotate simultaneously, and all the screws rotate simultaneously. As the screws rotate, the nuts slide. All the nuts slide in the same direction, i.e., towards the can lid. All the clamping sliders clamp the can lid simultaneously until the clamping sliders touch the can lid. The pressure sensor senses the pressure signal, and the hollow cup motor stops rotating. After the clamping sliders clamp the can lid, they provide complete positioning and clamping of the can lid, preventing accidental movement of the can lid during the welding process.

[0011] Furthermore, the sliding seat has a through hole in the radial direction corresponding to each clamping arm, and a clamping pin is provided in the through hole. A push spring is provided between the clamping pin and the clamping slider. Each clamping slider is provided with a pressure sensor, which is connected to the control system through a circuit. When the clamping slider moves towards the can lid, it will press the push spring, which in turn presses the clamping pin, which in turn presses the sliding column, locking the position of the sliding seat, thereby fixing the can lid and preventing it from shaking. By using replaceable contour cams and air nozzle positioning fixtures, together with a conical platform, different models of can lids and valve bodies can be welded, realizing the universality of the fixture, simplifying the clamping process, and achieving rapid clamping.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. Under the action of gravity, the can lid slides into contact with the conical surface during the descent until the bottom edge of the can lid contacts the conical surface of the conical platform. At this time, the center line of the can lid and the center line of the conical platform are completely coincident, realizing the automatic centering of the can lid on the fixture, avoiding the error of manual positioning, saving clamping time, and improving the clamping efficiency of the fixture.

[0014] 2. After the clamping slider moves towards the can lid, it will press the push spring. The push spring presses the clamping pin, and the clamping pin presses the sliding column, locking the position of the sliding seat, thereby fixing the can lid and preventing shaking. Through the replaceable contour cam and the air nozzle positioning fixture, together with the conical platform, different models of can lids and valve bodies can be welded, realizing the universality of the fixture and achieving quick clamping. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the overall appearance and structure of the present invention. Figure 2 ;

[0017] Figure 3 This is a partial schematic diagram of the external structure of the present invention. Figure 1 ;

[0018] Figure 4 This is a schematic diagram of the disassembled structure of the present invention;

[0019] Figure 5 This is a schematic diagram of the welding torch part of the present invention;

[0020] Figure 6 This is a schematic diagram of the structure of the can lid positioning clamp of the present invention. Figure 1 ;

[0021] Figure 7 This is a schematic diagram of the structure of the can lid positioning clamp of the present invention. Figure 2 ;

[0022] Figure 8 This is a schematic diagram of the valve body of the present invention. Figure 1 ;

[0023] Figure 9 This is a schematic diagram of the valve body of the present invention. Figure 2 .

[0024] In the diagram: 1. Machine base; 2. Column; 3. Electric push rod; 4. Lifting platform; 5. Reducer; 6. Servo motor; 7. Contouring cam; 8. Centering shaft; 9. Sliding cantilever; 10. Welding machine; 11. Driven wheel; 12. Air nozzle seat; 13. Air nozzle pressure rod; 14. Conical platform; 15. Sliding seat; 16. Hollow cup motor; 17. Driving bevel gear; 18. Clamping arm; 19. Clamping slider; 20. Nut; 21. Screw; 22. Driven bevel gear; 23. Return spring; 24. Push spring; 25. Pressure pin; 26. Valve body. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example: Figures 1-7As shown, the present invention provides a technical solution: a contour welding device with rapid clamping and positioning function, including a machine base 1, a column 2, a welding fixture, and a can lid and a valve body 26 to be welded. The column 2 is mounted on the machine base 1, which has a positioning groove. The welding fixture includes a can lid positioning fixture and a valve body positioning fixture. The can lid positioning fixture is bolted to the positioning groove. A lifting platform 4 is mounted on the column 2, and a positioning component and a welding machine 10 are mounted on the lifting platform 4. The valve body positioning fixture includes a valve seat 12 and a valve pressure rod 13. The nozzle seat 12 is installed on the can lid positioning fixture, and the nozzle pressure rod 13 is installed at the bottom of the positioning assembly. The welding fixtures used in the welding equipment are replaced and installed as needed. The operator first places the valve body 26 to be welded on the nozzle seat 12, and then places the can lid on the can lid positioning fixture. After the preparation is completed, the lifting platform 4 drives the welding machine 10 to descend until the nozzle pressure rod 13 contacts the valve body 26. The pressure sensor detects the pressure signal, and the lifting platform 4 stops moving, indicating that the welding machine 10 is in the welding position.

[0027] An electric push rod 3 is installed inside the column 2. The piston rod of the electric push rod 3 is connected to the lifting platform 4. The lifting platform 4 is slidably mounted on the column 2. A servo motor 6 and a reducer 5 are installed above the lifting platform 4. The motor shaft of the servo motor 6 is connected to the input end of the reducer 5. The positioning assembly includes a centering shaft 8. The output end of the reducer 5 is connected to the centering shaft 8. The centering shaft 8 passes through the lifting platform 4. A replaceable contour cam 7 is installed at the bottom of the lifting platform 4. The centering shaft 8 passes through the middle of the contour cam 7. The air nozzle pressure rod 13 is connected to the bottom of the centering shaft 8. A pressure sensor is installed between the air nozzle pressure rod 13 and the centering shaft 8. The air nozzle pressure rod 13 is a two-section adapter rod structure. A spline groove is opened in the middle section of the centering shaft 8. A sliding cantilever 9 is slidably installed on the spline shaft. The welding machine 10 is slidably installed on the sliding cantilever 9. A spring is installed between the side of the welding machine 10 away from the centering shaft 8 and the sliding cantilever 9. A transfer bracket is installed on the top of the welding machine 10. A driven wheel 11 is rotatably installed on the transfer bracket. A contouring ring groove is opened on the outer contour of the contouring cam 7. The driven wheel 11 rolls in contact with the lower edge of the contouring ring groove.

[0028] The electric push rod 3 drives the lifting platform 4 to move up and down. The servo motor 6 drives the reducer 5 to work. The reducer 5 drives the centering shaft 8 to rotate. The centering shaft 8 drives the sliding cantilever 9 to rotate through the spline groove. The spring pushes the welding machine 10 to keep in contact with the contour cam 7. Driven by the centering shaft 8, the welding machine 10 rotates around the contour cam 7. The contour of the contour ring groove coincides with the welding trajectory. The driven wheel 11 rolls along the contour ring groove. The welding machine 10 can then move along the fixed welding trajectory to weld the can cover and valve body 26.

[0029] The can lid positioning fixture includes a conical pedestal 14 and a sliding seat 15. The conical pedestal 14 is hollow inside, and a vertical sliding column is installed at the center of the pedestal 14. The sliding seat 15 is slidably mounted on the sliding column. A return spring 23 is installed between the bottom of the sliding seat 15 and the lower inner wall of the conical pedestal 14. An air nozzle seat 12 is installed on the top of the conical pedestal 14. Three clamping arms 18 are installed on the sliding seat 15, and the three clamping arms 18 are evenly distributed in a circumferential shape on the sliding seat 15. The conical wall of the conical pedestal 14 has through slots, the same number as the number of clamping arms 18. The clamping arms 18 pass through the through slots to hold the can lid. When the operator aligns the hole on the can lid with the valve body 26 and places it on the clamping arm 18, the weight of the can lid overcomes the pushing force of the return spring 23 on the sliding seat 15. Under the action of gravity, the clamping arm 18 descends. Since the side of the conical platform 14 is a conical surface, the can lid slides in contact with the conical surface during the descent until the bottom edge of the can lid contacts the conical surface of the conical platform 14. At this time, the center line of the can lid and the center line of the conical platform 14 are completely coincident, realizing the automatic centering of the can lid on the fixture, avoiding the error of manual positioning, saving clamping time, and improving the clamping efficiency of the fixture.

[0030] Each clamping arm 18 has a slidably mounted clamping slider 19. A nut 20 is provided at the bottom of the clamping slider 19. A screw 21 is rotatably mounted at the bottom of the clamping arm 18. The nut 20 is threadedly connected to the screw 21. A driven bevel gear 22 is installed on the side of the screw 21 near the sliding seat 15. A hollow cup motor 16 is installed on the sliding seat 15. A driving bevel gear 17 is connected to the hollow cup motor 16. The driving bevel gear 17 meshes with all the driven bevel gears 22. The sliding seat 15 has a through hole in the radial direction corresponding to each clamping arm 18. A clamping pin 25 is provided in the through hole. A push spring 24 is provided between the clamping pin 25 and the clamping slider 19. A pressure sensor is provided on each clamping slider 19. The pressure sensor is connected to the control system through a circuit.

[0031] The control system energizes the hollow cup motor 16, which drives the driving bevel gear 17 to rotate. The driving bevel gear 17 then drives all the driven bevel gears 22 to rotate simultaneously, causing all the screws 21 to rotate at the same time. As the screws 21 rotate, the nuts 20 slide in the same direction, moving towards the can lid. All the clamping sliders 19 simultaneously clamp the can lid until they touch it. At this point, the pressure sensor detects a pressure signal, the hollow cup motor 16 stops rotating, and the clamping sliders 19 clamp the can lid. The can lid is fully positioned and clamped to prevent accidental movement during welding. As the clamping slider 19 moves closer to the can lid, it presses the push spring 24, which in turn presses the clamping pin 25. The clamping pin 25 then presses the sliding column, locking the position of the sliding seat 15 and thus fixing the can lid and preventing it from shaking. Through the replaceable contour cam 7 and the air nozzle positioning fixture, together with the conical platform 14, different models of can lids and valve nozzle bodies 26 can be welded, achieving the universality of the fixture, simplifying the clamping process, and enabling rapid clamping.

[0032] The working principle of this invention: The welding fixtures used in the welding equipment are replaced and installed as needed. The operator first places the valve body 26 to be welded on the air nozzle seat 12, and then places the can cover on the can cover positioning fixture. After the preparation is completed, the lifting platform 4 drives the welding machine 10 to descend until the air nozzle pressure rod 13 contacts the valve body 26. The pressure sensor detects the pressure signal, and the lifting platform 4 stops moving, indicating that the welding machine 10 is in the welding position. The electric push rod 3 drives the lifting platform 4 to move up and down. The servo motor 6 drives the reducer 5 to work. The reducer 5 drives the centering shaft 8 to rotate. The centering shaft 8 drives the sliding cantilever 9 to rotate through the spline groove. The spring pushes the welding machine 10 to keep in contact with the contour cam 7. Driven by the centering shaft 8, the welding machine 10 rotates around the contour cam 7. The contour of the contour ring groove coincides with the welding trajectory. The driven wheel 11 rolls along the contour ring groove, and the welding machine 10 can move along the fixed welding trajectory to weld the can cover and the valve body 26.

[0033] When placing the can lid, the operator aligns the hole on the can lid with the valve body 26 and places it on the clamping arm 18. The weight of the can lid overcomes the pushing force of the return spring 23 on the sliding seat 15. Under the action of gravity, the clamping arm 18 descends. Since the side of the conical platform 14 is conical, the can lid slides and contacts the conical surface during the descent until the bottom edge of the can lid contacts the conical surface of the conical platform 14. At this time, the center line of the can lid and the center line of the conical platform 14 are completely coincident, realizing the automatic centering of the can lid on the fixture, avoiding the error of manual positioning, saving clamping time, and improving the clamping efficiency of the fixture.

[0034] The control system energizes the hollow cup motor 16, which drives the driving bevel gear 17 to rotate. The driving bevel gear 17 then drives all the driven bevel gears 22 to rotate simultaneously, causing all the screws 21 to rotate at the same time. As the screws 21 rotate, the nuts 20 slide in the same direction, moving towards the can lid. All the clamping sliders 19 simultaneously clamp the can lid until they touch it. At this point, the pressure sensor detects a pressure signal, the hollow cup motor 16 stops rotating, and the clamping sliders 19 clamp the can lid. The can lid is fully positioned and clamped to prevent accidental movement during welding. As the clamping slider 19 moves closer to the can lid, it presses the push spring 24, which in turn presses the clamping pin 25. The clamping pin 25 then presses the sliding column, locking the position of the sliding seat 15 and thus fixing the can lid and preventing it from shaking. Through the replaceable contour cam 7 and the air nozzle positioning fixture, together with the conical platform 14, different models of can lids and valve nozzle bodies 26 can be welded, achieving the universality of the fixture, simplifying the clamping process, and enabling rapid clamping.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A contour welding device with rapid clamping and positioning function, characterized in that: The assembly includes a machine base (1), a column (2), a welding fixture, and a can lid and a valve body (26) to be welded. The column (2) is set on the machine base (1), and a positioning groove is provided on the machine base (1). The welding fixture includes a can lid positioning fixture and a valve body positioning fixture. The can lid positioning fixture is installed on the positioning groove by bolts. A lifting platform (4) is provided on the column (2). A positioning component and a welding machine (10) are installed on the lifting platform (4). A servo motor (6) and a reducer (5) are provided above the lifting platform (4). The valve body positioning fixture includes a valve seat (12) and a valve pressure rod (13). The valve seat (12) is installed on the can lid positioning fixture, and the valve pressure rod (13) is installed at the bottom of the positioning component. The positioning component includes a centering shaft (8), the output end of the reducer (5) is connected to the centering shaft (8), and the centering shaft (8) passes through the lifting platform (4). The bottom of the lifting platform (4) is equipped with a replaceable contour cam (7), the centering shaft (8) passes through the middle of the contour cam (7), the air nozzle pressure rod (13) is connected to the bottom of the centering shaft (8), a pressure sensor is provided between the air nozzle pressure rod (13) and the centering shaft (8), the air nozzle pressure rod (13) is a two-section adapter rod structure, the middle section of the centering shaft (8) is provided with a spline groove, a sliding cantilever (9) is slidably installed on the spline shaft, the welding machine (10) is slidably installed on the sliding cantilever (9), a spring is provided between the side of the welding machine (10) away from the centering shaft (8) and the sliding cantilever (9); The welding machine (10) is provided with a transfer bracket on top, and a driven wheel (11) is rotatably mounted on the transfer bracket. A contouring annular groove is provided on the outer contour of the contouring cam (7), and the driven wheel (11) rolls in contact with the lower edge of the contouring annular groove. The can lid positioning fixture includes a conical platform (14) and a sliding seat (15). The conical platform (14) is hollow inside. A sliding column is vertically arranged in the center of the conical platform (14). The sliding seat (15) is slidably mounted on the sliding column. A return spring (23) is arranged between the bottom of the sliding seat (15) and the lower inner wall of the conical platform (14). The air nozzle seat (12) is installed on the top of the conical platform (14). At least three clamping arms (18) are provided on the sliding seat (15). The at least three clamping arms (18) are evenly distributed on the sliding seat (15) in a circumferential shape. The conical wall of the conical platform (14) has the same number of through slots as the clamping arms (18), and the clamping arms (18) pass through the through slots.

2. The contour welding equipment with rapid clamping and positioning function according to claim 1, characterized in that: An electric push rod (3) is installed inside the column (2). The piston rod of the electric push rod (3) is connected to the lifting platform (4). The lifting platform (4) is slidably installed on the column (2). The motor shaft of the servo motor (6) is connected to the input end of the reducer (5).

3. The contour welding equipment with rapid clamping and positioning function according to claim 1, characterized in that: Each clamping arm (18) is slidably mounted with a clamping slider (19), and a nut (20) is provided at the bottom of the clamping slider (19). A screw (21) is rotatably mounted at the bottom of the clamping arm (18). The nut (20) is threadedly connected to the screw (21). A driven bevel gear (22) is mounted on the side of the screw (21) near the sliding seat (15). A hollow cup motor (16) is mounted on the sliding seat (15). An active bevel gear (17) is connected to the hollow cup motor (16). The active bevel gear (17) meshes with all the driven bevel gears (22).

4. The contour welding equipment with rapid clamping and positioning function according to claim 3, characterized in that: The sliding seat (15) has a through hole in the radial direction corresponding to each clamping arm (18). A clamping pin (25) is provided in the through hole. A push spring (24) is provided between the clamping pin (25) and the clamping slider (19). A pressure sensor is provided on each clamping slider (19). The pressure sensor is connected to the control system through a circuit.

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