Multifunctional clamp for electronic testing of projection-welded parts

Abstract

This invention relates to the field of weldment inspection equipment, and more particularly to a multifunctional fixture for electronic inspection of projection weldments, comprising: a base, a lower fixture, an upper fixture, and a detection element; both the upper and lower fixtures are slidably connected with detection pins, and the detection element is mounted on the detection pins; the base is provided with a closing electric push rod, the output end of which is fixedly connected to the upper fixture; the upper and lower fixtures are provided with a slag detection mechanism and a slag removal mechanism; this invention, by setting a retractable lifting block, a rotating block, a detection probe, and an electrode plate in the mounting groove, allows the detection probe to rotate around the projection on the projection weldment. When the detection probe contacts the slag or burr, it triggers the controller circuit, thereby extending the electrode plate and heating it to melt and remove the burr, thus preventing the detection pin and the detection element from being affected by slag or burr when they extend into the projection weldment or are fitted onto the outside of the projection on the projection weldment.

Description

Technical Field

[0001] This invention relates to the field of welding inspection equipment, and in particular to a multi-functional fixture for electronic inspection of convex welds. Background Technology

[0002] As a highly efficient and reliable resistance welding process, projection welding has been widely used in many fields such as automobile manufacturing, home appliance production, and sheet metal structure processing. The core principle of projection welding is to pre-process projections on the plates to be welded, then stack the plates to be welded one on top of the other, and crush the projections by applying pressure and electricity, thereby achieving an effective connection between the plates. The welding quality of projection welded parts depends on the machining accuracy of the projections themselves, the stability of the welding parameters, and the post-weld forming state. Therefore, it is usually necessary to use special electronic inspection fixtures to inspect the dimensional accuracy and welding quality of projection welded assemblies.

[0003] Existing inspection fixtures for projection welds have certain limitations in practical applications. Before the electronic inspection fixture clamps the projection weld, it is impossible to detect whether there are weld slag or flash particles at the clamping area. Therefore, after the electronic inspection fixture clamps the projection weld, the weld slag or flash will affect the electronic inspection fixture, causing abnormal clamping of the projection weld, resulting in positioning failure and drift of the measurement reference, thus creating limitations.

[0004] Therefore, we propose a multi-functional fixture for electronic inspection of projection welds. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides a multi-functional fixture for electronic inspection of projection welds, which overcomes the shortcomings of the prior art and aims to solve the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-functional fixture for electronic inspection of projection welds, comprising:

[0007] The system comprises a base, a lower clamp, an upper clamp, and a detection element. Detection pins are slidably connected within both the upper and lower clamps. The detection element is mounted on the detection pins. The detection pins within the upper and lower clamps are respectively fitted onto the outer and inner sides of the protrusion on the weldment for detection. A closing electric push rod is provided on the base, and the output end of the closing electric push rod is fixedly connected to the upper clamp.

[0008] The upper clamp and the lower clamp are equipped with a slag detection mechanism and a slag removal mechanism. The slag detection mechanism and the slag removal mechanism move along the workpiece welding trajectory to detect whether there is slag around the welding position on the workpiece surface. When slag is detected, the slag removal mechanism extends and heats the slag to melt the burrs or slag.

[0009] Preferably, the welding slag detection mechanism includes a lifting block, a rotating block, a detection probe, and a spring telescopic rod. The upper clamp and the lower clamp are provided with mounting grooves. The lifting block is slidably connected in the mounting groove. A lifting electric push rod is connected between the lifting block and the mounting groove. A gear ring is fixedly connected to the lifting block. The rotating block is rotatably connected to the lifting block. A rotating motor is fixedly connected to the rotating block. A gear that meshes with the gear ring is fixedly connected to the output end of the rotating motor.

[0010] The detection pin is fixedly connected in the mounting slot, and an electric push rod is connected between the detection pin and the mounting slot;

[0011] A sliding block is mounted on the rotating block, and the detection probe and the spring telescopic rod are mounted on the sliding block. The detection probe and the spring telescopic rod are connected to the controller via wiring.

[0012] Preferably, the cleaning mechanism includes a telescopic block, a connecting block, and an electrode plate. The telescopic block is slidably connected to the sliding block, and a telescopic electric push rod is connected between the telescopic block and the sliding block. A deflection block is installed on the telescopic block, and a pair of connecting blocks are installed on the deflection block. The two ends of the electrode plate are fixedly connected to the two connecting blocks. The electrode plate is bent into an inverted U-shape, and the two ends of the electrode plate are connected to a controller through a circuit.

[0013] By setting a retractable lifting block, rotating block, detection probe and electrode plate in the mounting groove, the detection probe rotates around the protrusion on the weldment. When the detection probe comes into contact with the weld slag or burr, it triggers the controller circuit to connect, so that the electrode plate extends and is heated to melt and remove the burr. This prevents the detection pin and detection element from being affected by weld slag or burr when they extend into the weldment or are sleeved on the outside of the protrusion on the weldment.

[0014] Preferably, the rotating block has a sliding groove, the sliding block is slidably connected in the sliding groove, a sliding motor is fixedly connected in the sliding groove, and the output end of the sliding motor is fixedly connected to a lead screw that is threadedly connected to the sliding block.

[0015] Preferably, the deflection block is rotatably connected to the telescopic block, and a fixing screw is threaded onto the telescopic block, the fixing screw fixing the deflection block by compression.

[0016] Preferably, the deflection block has an adjustment groove, the connecting block is slidably connected in the adjustment groove, and a threaded adjustment rod is rotatably connected to the deflection block. The threaded adjustment rod is threadedly engaged with the two connecting blocks, and the two threads have opposite directions of rotation.

[0017] Preferably, a vibration groove is formed inside the sliding block, a vibration motor is installed inside the vibration groove, and a polarizing block is fixedly connected to the output end of the vibration motor.

[0018] By rotating the deflection block and the electrode plate, the orientation of the tip of the electrode plate is adjusted so that the tip of the electrode plate always faces the welding position of the protrusion on the weldment, thereby improving the applicability and effectiveness of the present invention.

[0019] The beneficial effects of this invention are:

[0020] 1. The present invention provides a retractable lifting block, a rotating block, a detection probe, and an electrode plate within a mounting groove. The detection probe rotates around the protrusion on the weldment. When the detection probe comes into contact with weld slag or burrs, it triggers the controller circuit to connect, thereby extending the electrode plate and heating it to melt and remove the burrs. This prevents the detection pin and detection element from being affected by weld slag or burrs when they extend into the weldment or are fitted onto the outside of the protrusion on the weldment.

[0021] 2. By rotating the deflection block and the electrode plate, the present invention adjusts the orientation of the top of the electrode plate, ensuring that the top of the electrode plate always faces the welding position of the protrusion on the weldment, thereby improving the applicability and effectiveness of the present invention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0025] Figure 4 This is a partial cross-sectional view of the lower clamp, lifting block, rotating block, and detection pin in this invention;

[0026] Figure 5 This diagram shows the positional relationship of the electrode plates on the sliding block in this invention, located on both the inner and outer sides of the weldment, when cleaning the burrs on the weldment.

[0027] In the diagram: 1. Base; 11. Lower clamp; 12. Upper clamp; 13. Detection element; 15. Detection pin; 16. Closing electric push rod; 21. Lifting block; 22. Rotating block; 23. Detection probe; 24. Spring telescopic rod; 25. Mounting slot; 27. Gear ring; 28. Rotating motor; 29. ​​Gear; 3. Sliding block; 4. Telescopic block; 41. Connecting block; 42. Electrode plate; 43. Telescopic electric push rod; 44. Deflection block; 5. Sliding groove; 51. Sliding motor; 52. Fixing screw; 6. Adjustment groove; 61. Threaded adjustment rod; 7. Vibration groove; 71. Vibration motor; 8. Projection weld. Detailed Implementation

[0028] 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.

[0029] Example 1: Refer to the appendix of the instruction manual. Figures 1 to 5 A multi-functional fixture for inspecting projectile welds, comprising:

[0030] The base 1, lower clamp 11, upper clamp 12, and detection element 13 are provided. Detection pins 15 are slidably connected in both the upper clamp 12 and the lower clamp 11. The detection element 13 is installed on the detection pins 15. The detection pins 15 in the upper clamp 12 and the lower clamp 11 are respectively sleeved on the outer and inner sides of the protrusion on the weldment 8 to detect the protrusion on the weldment 8. A closing electric push rod 16 is provided on the base 1. The output end of the closing electric push rod 16 is fixedly connected to the upper clamp 12.

[0031] The upper clamp 12 and the lower clamp 11 are equipped with a slag detection mechanism and a slag removal mechanism. The slag detection mechanism and the slag removal mechanism move along the workpiece welding trajectory to detect whether there is slag around the welding position on the workpiece surface. When slag is detected, the removal mechanism extends and heats the slag to melt the burrs or slag.

[0032] In this invention, the welding slag detection mechanism includes a lifting block 21, a rotating block 22, a detection probe 23, and a spring telescopic rod 24. The upper clamp 12 and the lower clamp 11 are provided with mounting grooves 25. The lifting block 21 is slidably connected in the mounting groove 25. A lifting electric push rod is connected between the lifting block 21 and the mounting groove 25. A toothed ring 27 is fixedly connected to the lifting block 21. The rotating block 22 is rotatably connected to the lifting block 21. A rotating motor 28 is fixedly connected to the rotating block 22. A gear 29 that meshes with the toothed ring 27 is fixedly connected to the output end of the rotating motor 28.

[0033] The detection pin 15 is fixedly connected in the mounting groove 25, and an electric push rod is connected between the detection pin 15 and the mounting groove 25.

[0034] A sliding block 3 is mounted on the rotating block 22. The detection probe 23 and the spring telescopic rod 24 are mounted on the sliding block 3. The detection probe 23 and the spring telescopic rod 24 are connected to the controller through a circuit.

[0035] In this invention, the cleaning mechanism includes a telescopic block 4, a connecting block 41, and an electrode plate 42. The telescopic block 4 is slidably connected to the sliding block 3. A telescopic electric push rod 43 is connected between the telescopic block 4 and the sliding block 3. A deflection block 44 is installed on the telescopic block 4. A pair of connecting blocks 41 are installed on the deflection block 44. The two ends of the electrode plate 42 are fixedly connected to the two connecting blocks 41. The electrode plate 42 is bent into an inverted U-shape. The two ends of the electrode plate 42 are connected to the controller through a circuit.

[0036] In this invention, the flat plate and the protrusion are welded together using a projection welding machine. The welded protrusion 8 is then placed on the lower clamp 11. Next, the electric push rod 16 is closed, driving the upper clamp 12 downwards, so that the upper clamp 12 and lower clamp 11 clamp the protrusion 8. The protrusion on the protrusion 8 is located within the mounting groove 25 on the upper clamp 12. Then, the electric push rod is raised, driving the lifting block 21, rotating block 22, detection probe 23, and spring telescopic rod 24 to move towards the protrusion 8, so that the spring telescopic rod 24 contacts the protrusion 8. The detection probe 23 on the lower clamp 11 is located on the inner hole side of the protrusion on the protrusion 8, and the detection probe 23 on the upper clamp 12 is located on the outer side of the protrusion on the protrusion 8 (see attached specification). Figure 5 Then, the rotating motor 28 drives the corresponding gear 29 to rotate, causing the rotating block 22 to rotate on the lifting block 21 under the action of the rotating motor 28, gear 29, and gear ring 27. This causes the detection probe 23 on the upper clamp 12 to rotate around the outer side of the protrusion on the weldment 8, and the detection probe 23 on the lower clamp 11 to rotate around one side of the inner hole of the protrusion on the weldment 8. The controller is connected to the detection probe 23 and the spring telescopic rod 24. When weld slag or burrs appear around the protrusion on the weldment 8, the detection probe 23 and the weld slag... The weld slag or burr comes into contact with the weld slag or burr and the projection weld 8 to form a circuit path, so that the controller has current flowing through it. Then the telescopic electric push rod 43 pushes the telescopic block 4, so that the electrode plate 42 on the telescopic block 4 extends out, and the controller passes current into the electrode plate 42, so that the electrode plate 42 heats up. As a result, the electrode plate 42 approaches the weld slag or burr under the action of the rotating block 22 and the telescopic block 4, heats and melts the burr or weld slag and scrapes it off, thereby removing the burr or weld slag generated during the projection welding machine on the projection weld 8.

[0037] Next, the lifting electric push rod drives the lifting block 21, rotating block 22, detection probe 23 and electrode plate 42 back to their original positions. The detection pin 15 on the lower clamp 11 is inserted into the inner hole of the protrusion on the projection weld 8 under the drive of the electric push rod in the mounting groove 25. The detection pin 15 on the upper clamp 12 is sleeved on the outside of the protrusion on the projection weld 8. The detection element 13 on the detection pin 15 performs perpendicularity and position detection on the projection weld 8.

[0038] The present invention provides a retractable lifting block 21, a rotating block 22, a detection probe 23, and an electrode plate 42 within the mounting groove 25. The detection probe 23 rotates around the protrusion on the weldment 8. When the detection probe 23 comes into contact with the weld slag or burrs, it triggers the controller circuit to connect, thereby extending the electrode plate 42 and heating it to melt and remove the burrs. This prevents the detection pin 15 and the detection element 13 from being affected by the weld slag or burrs when they are inserted into the weldment 8 or fitted on the outside of the protrusion on the weldment 8.

[0039] Example 2: Based on Example 1, in this invention, a sliding groove 5 is provided on the rotating block 22, the sliding block 3 is slidably connected in the sliding groove 5, a sliding motor 51 is fixedly connected in the sliding groove 5, and a lead screw that is threadedly connected to the sliding block 3 is fixedly connected to the output end of the sliding motor 51.

[0040] In this invention, the deflection block 44 is rotatably connected to the telescopic block 4, and the telescopic block 4 is threadedly connected to the fixing screw 52, ​​which fixes the deflection block 44 by pressing.

[0041] In this invention, the deflection block 44 is provided with an adjustment groove 6, the connecting block 41 is slidably connected in the adjustment groove 6, and the deflection block 44 is rotatably connected with a threaded adjustment rod 61. The threaded adjustment rod 61 is threadedly engaged with two connecting blocks 41, and the two threads rotate in opposite directions.

[0042] In this invention, a vibration groove 7 is provided inside the sliding block 3, a vibration motor 71 is installed inside the vibration groove 7, and a polarizing block is fixedly connected to the output end of the vibration motor 71.

[0043] In this invention, the sliding block 3 is slidably connected to the rotating block 22. The corresponding lead screw can be rotated by the sliding motor 51, so that the sliding block 3 moves on the rotating block 22, thereby adjusting the position of the detection probe 23, the telescopic block 4 and the electrode plate 42 to adapt to the protrusions on the weldment 8 of different sizes. It can also adjust the distance to the protrusions on the weldment 8 to prevent false triggering due to excessive distance and to prevent missed detection due to excessive distance.

[0044] In this invention, the orientation of the electrode plate 42 can be adjusted by loosening the fixing screw 52 and then rotating the deflection block 44, the connecting block 41 and the electrode plate 42. This ensures that when inspecting protrusions of different sizes, the top of the electrode plate 42 always faces the welding part on the protrusion weld 8, and the electrode plate 42 can achieve the best cleaning effect. At the same time, by rotating the threaded adjustment rod 61, the two connecting blocks 41 are moved and the distance between the two connecting blocks 41 is adjusted, thereby adjusting the width of the top of the electrode plate 42. This allows the width of the top of the electrode plate 42 to be adjusted according to the protrusions on the protrusion weld 8 of different sizes and specifications.

[0045] In this invention, after the electrode sheet 42 scrapes the welding slag or burrs off the protruding weldment 8, the vibration motor 71 drives the polarization block to rotate, causing the sliding block 3 and the electrode sheet 42 to vibrate. When the welding slag or burrs stick to the electrode sheet 42, the vibration of the electrode sheet 42 can shake off the welding slag or burrs sticking to the electrode sheet 42, thereby preventing it from affecting the electrode sheet 42.

[0046] The present invention improves the applicability and effectiveness of the invention by rotating the deflection block 44 and the electrode plate 42 to adjust the orientation of the top of the electrode plate 42, so that the top of the electrode plate 42 can always face the welding position of the protrusion on the protrusion weldment 8.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-functional fixture for inspecting projection welded parts, characterized in that: include: The base (1), lower clamp (11), upper clamp (12) and detection element (13) are provided; both the upper clamp (12) and the lower clamp (11) are slidably connected with detection pins (15), the detection element (13) is installed on the detection pins (15), the detection pins (15) in the upper clamp (12) and the lower clamp (11) are respectively sleeved on the outer and inner sides of the protrusion on the weldment (8) to detect the protrusion on the weldment (8), and a closed electric push rod (16) is provided on the base (1), the output end of the closed electric push rod (16) is fixedly connected to the upper clamp (12); The upper clamp (12) and the lower clamp (11) are provided with a slag detection mechanism and a cleaning mechanism. The slag detection mechanism and the cleaning mechanism move along the workpiece welding trajectory to detect whether there is slag around the welding position on the workpiece surface. When slag is detected, the cleaning mechanism extends and heats the slag to melt the burrs or slag. The welding slag detection mechanism includes a lifting block (21), a rotating block (22), a detection probe (23), and a spring telescopic rod (24). The upper clamp (12) and the lower clamp (11) are provided with mounting grooves (25). The lifting block (21) is slidably connected in the mounting groove (25). A lifting electric push rod is connected between the lifting block (21) and the mounting groove (25). A gear ring (27) is fixedly connected to the lifting block (21). The rotating block (22) is rotatably connected to the lifting block (21). A rotating motor (28) is fixedly connected to the rotating block (22). A gear (29) that meshes with the gear ring (27) is fixedly connected to the output end of the rotating motor (28). The detection pin (15) is fixedly connected in the mounting groove (25), and an electric push rod is connected between the detection pin (15) and the mounting groove (25); A sliding block (3) is installed on the rotating block (22), the detection probe (23) and the spring telescopic rod (24) are installed on the sliding block (3), and the detection probe (23) and the spring telescopic rod (24) are connected to the controller through a circuit; The cleaning mechanism includes a telescopic block (4), a connecting block (41), and an electrode plate (42). The telescopic block (4) is slidably connected to the sliding block (3). A telescopic electric push rod (43) is connected between the telescopic block (4) and the sliding block (3). A deflection block (44) is installed on the telescopic block (4). A pair of connecting blocks (41) are installed on the deflection block (44). The two ends of the electrode plate (42) are fixedly connected to the two connecting blocks (41). The electrode plate (42) is bent into an inverted U-shape. The two ends of the electrode plate (42) are connected to the controller through a circuit.

2. The multi-functional fixture for electronic inspection of projection welds according to claim 1, characterized in that: The rotating block (22) has a sliding groove (5), the sliding block (3) is slidably connected in the sliding groove (5), the sliding motor (51) is fixedly connected in the sliding groove (5), and the output end of the sliding motor (51) is fixedly connected to a lead screw that is threadedly connected to the sliding block (3).

3. The multi-functional fixture for electronic inspection of projection welds according to claim 2, characterized in that: The deflection block (44) is rotatably connected to the telescopic block (4), and a fixing screw (52) is threaded onto the telescopic block (4). The fixing screw (52) fixes the deflection block (44) by pressing.

4. The multi-functional fixture for electronic inspection of projection welds according to claim 3, characterized in that: The deflection block (44) is provided with an adjustment groove (6), and the connecting block (41) is slidably connected in the adjustment groove (6). A threaded adjustment rod (61) is rotatably connected to the deflection block (44). The threaded adjustment rod (61) is threadedly engaged with the two connecting blocks (41), and the two threads rotate in opposite directions.

5. A multi-functional fixture for electronic inspection of projection welds according to claim 4, characterized in that: The sliding block (3) has a vibration groove (7) inside, and a vibration motor (71) is installed inside the vibration groove (7). A polarizing block is fixedly connected to the output end of the vibration motor (71).

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