Solder skipping detection device for projection welding

Abstract

The utility model discloses a projection welding missing welding detection device which comprises a fixed limiting body and a movable limiting body, and the fixed limiting body and the movable limiting body are matched to clamp a welding piece. The movable limiting body is connected with a reference seat through an adapter frame, a plurality of detection rods which are arranged in parallel are inserted into the reference seat, the length direction of the detection rods is parallel to the moving direction of the movable limiting body, and the detection rods are in sliding fit with insertion holes of the reference seat in the axial direction of the detection rods. The two ends of the detection rod extend out of the two ends of the insertion hole respectively, and the detection rod is connected with the inner wall of the insertion hole through an elastic reset piece. And induction modules are arranged at the ends, away from the welding piece, of the detection rods at intervals, the induction modules are fixedly connected with the transfer frame, and the induction modules are provided with a plurality of proximity induction units corresponding to the multiple detection rods. According to the utility model, the projection welding spot of the welding piece can be detected, and welding omission is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of welding detection, in particular to a projection welding non-welding detection device. Background Art

[0002] Projection welding is a common process in welding. In the welding process of projection welding nuts, non-welding often occurs, resulting in nut loosening or falling, seriously affecting the welding quality. Key welded parts may also cause potential safety hazards. Especially in the welding of automotive components, the projection welding nut process is often used, and most automotive components have special, complex and diverse structures. There is a lack of detection tools, and common welding inspection methods are difficult to operate and have low efficiency, unable to effectively avoid non-welding. Summary of the Invention

[0003] Object of the Invention: In order to overcome the deficiencies in the prior art, the utility model provides a projection welding non-welding detection device, which can detect the projection welding points of welded parts and avoid non-welding.

[0004] Technical Solution: To achieve the above object, a projection welding non-welding detection device of the utility model includes a base, on which a fixed limiting body and a movable limiting body are arranged. The movable limiting body is driven by a driving module to approach or move away from the fixed limiting body, and the fixed limiting body and the movable limiting body cooperate to clamp the welded part; a reference base is connected to the movable limiting body through a transfer frame, and a plurality of parallelly arranged detection rods are inserted into the reference base. The length direction of the detection rods is parallel to the moving direction of the movable limiting body. The detection rods are slidably matched with the insertion holes of the reference base along their own axial directions. Both ends of the detection rods extend out of both ends of the insertion holes respectively, and the detection rods are connected to the inner walls of the insertion holes through elastic resetting pieces; an induction module is arranged at a distance from the end of the detection rod away from the welded part, and the induction module is fixedly connected to the transfer frame. The induction module is provided with a plurality of proximity induction units corresponding to the plurality of detection rods.

[0005] Further, the induction module is provided with an adjustment frame, on which a plurality of the proximity induction units are fixedly arranged. The adjustment frame is fixedly connected to the transfer frame through fastening bolts. A plurality of strip-shaped grooves are arranged on the adjustment frame corresponding to the fastening bolts, and the plurality of strip-shaped grooves are parallelly arranged. The groove direction of the strip-shaped grooves is the same as the axial direction of the detection rods.

[0006] Further, the plurality of proximity induction units are respectively fixedly arranged on the plurality of adjustment frames.

[0007] Further, the plurality of detection rods are of equal length and their ends are flush.

[0008] Further, two detection rods are provided, and the two detection rods are respectively inserted into the two reference seats, and the two reference seats are respectively fixedly connected to the two adapter brackets.

[0009] Further, the adapter bracket is arranged to be lifted and lowered relative to the movable limiting body.

[0010] Beneficial effects: In a projection welding non-welding detection device of the present utility model, by contacting the projection welding nut with the detection rod, the detection rod is pushed to contact the proximity switch, generating an electrical signal. If there is a non-welding situation, when the movable limiting body fits on the surface of the welded part, the detection rod corresponding to the non-welding position still cannot contact the corresponding proximity switch, and thus no electrical signal can be generated. Whether there is a non-welding can be judged according to the presence or absence of the electrical signal, and multiple projection welding points can be synchronously detected, improving the detection efficiency. The detection action is simple, the operation is convenient, and the detection difficulty is small. It can effectively avoid the occurrence of non-welding. Description of the Drawings

[0011] Att Figure 1 is a schematic diagram of the overall structure of an embodiment of the present utility model. Specific Embodiments

[0012] The present utility model will be further described in detail below with reference to the drawings.

[0013] As shown in the attach Figure 1 The projection welding non-welding detection device includes a base 1, a fixed limiting body 2 and a movable limiting body 3 are arranged on the base 1, the movable limiting body 3 is driven by a driving module 4 to approach or move away from the fixed limiting body 2, and the fixed limiting body 2 and the movable limiting body 3 cooperate to clamp the welded part; a reference seat 6 is connected to the movable limiting body 3 through an adapter bracket 5, a plurality of detection rods 7 arranged in parallel are inserted into the reference seat 6, the length direction of the detection rods 7 is parallel to the moving direction of the movable limiting body 3, the detection rods 7 are in sliding fit with the insertion holes of the reference seat 6 along their own axial directions, both ends of the detection rods 7 extend out of both ends of the insertion holes respectively, and the detection rods 7 are connected to the inner walls of the insertion holes through elastic resetting members; an induction module is arranged at a distance from one end of the detection rod 7 away from the welded part, the induction module is fixedly connected to the adapter bracket 5, and a plurality of proximity induction units 9 are arranged corresponding to the plurality of detection rods 7.

[0014] This solution is used to detect projection-welded nuts of welded parts. The welded parts are placed against a fixed limiting body to limit the position of the welded parts. The welded parts can be fixed by an additional clamping mechanism, and then the driving module is started to make the movable limiting body close to the welded parts. When the movable limiting body is placed against the welded parts, all the detection rods are in contact with the nuts at the projection welding points, wherein the detection rods that contact the projection-welded nuts trigger the proximity sensing module to generate an electrical signal, while the detection rods that contact the non-projection-welded nuts cannot trigger the proximity sensing module to generate an electrical signal. The presence or absence of electrical signals can determine whether there is a leaky weld. Multiple detection rods are detected synchronously to improve detection efficiency. After the detection is completed, the movable limiting body is away from the welded parts, and as the detection rods are separated from the nut surface, each detection rod is reset under the action of the elastic reset member. Ensure the accuracy of the next detection.

[0015] The sensing module is provided with an adjustment frame 8, on which a plurality of proximity sensing units 9 are fixedly provided, and the adjustment frame 8 is fixedly connected to the adapter frame 5 by fastening bolts, and a strip groove 81 is provided on the adjustment frame 8 corresponding to the fastening bolts, and a plurality of the strip grooves 81 are arranged in parallel, and the groove direction of the strip groove 81 is arranged in the same direction as the axial direction of the detection rod 7. The distance between the sensing module and the reference seat can be adjusted by the adjustment frame, so as to meet the detection requirements of different distances between the point to be measured on the weldment and the position clamped by the double limiter, and can be adaptively adjusted according to the specific structure of the weldment.

[0016] The plurality of proximity sensing units 9 are fixedly mounted on the plurality of adjustment frames 8. The plurality of detection rods 7 are of equal length and their ends are arranged flush. The position of each proximity switch can be adjusted individually. For some welded parts with complex structures, the position of the projecting weld nut to be measured may be located in different planes, and thus the relative distance from the clamped position of the double limiter is different. Individual adjustment can effectively deal with this situation, making the application scope of the present solution wider.

[0017] Preferably, two detection rods 7 are provided, and the two detection rods 7 are respectively inserted into the two reference seats 6, and the two reference seats 6 are respectively fixedly connected to the two adapter frames 5. The adapter frame 5 is raised and lowered relative to the movable limiting body 3. Two detection rods are provided, and the lateral spacing between the two detection rods is adjustable, and the vertical distance difference is also adjustable, that is, the relative positions of the two detection rods in the vertical plane are adjustable. For welded parts with many convex welding points and complex relative positional relationships, only two adjacent points are detected each time, and each time, targeted adjustments can be made according to the relative positional relationship of the two points to be detected in the vertical plane, which greatly improves the versatility of the overall device. There is no need to specially set the distribution of the detection rods and the proximity sensing unit according to the distribution of the convex welding points on the welded parts, which makes the structure simpler and reduces the cost.

[0018] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A projection welding leak detection device, characterized in that: The invention comprises a base (1), wherein a fixed limiting body (2) and a movable limiting body (3) are arranged on the base (1), wherein the movable limiting body (3) is driven to approach or move away from the fixed limiting body (2) by a driving module (4), wherein the fixed limiting body (2) and the movable limiting body (3) cooperate to clamp a welded part; the movable limiting body (3) is connected to a reference seat (6) via an adapter frame (5), wherein a plurality of parallelly arranged detection rods (7) are inserted on the reference seat (6), wherein the length direction of the detection rods (7) is parallel to that of the movable limiting body (2). The detection rod (7) is arranged parallel to the moving direction of the body (3), the detection rod (7) is slidably matched with the insertion hole of the reference seat (6) along its own axial direction, the two ends of the detection rod (7) respectively extend out of the two ends of the insertion hole, and the detection rod (7) is connected to the inner wall of the insertion hole through an elastic reset member; a sensing module is arranged at a distance from one end of the detection rod (7) away from the welding part, the sensing module is fixedly connected to the adapter frame (5), and the sensing module is provided with a plurality of proximity sensing units (9) corresponding to the plurality of detection rods (7).

2. A projection welding leak detection device according to claim 1, characterized in that: The sensing module is provided with an adjustment frame (8), a plurality of proximity sensing units (9) are fixedly provided on the adjustment frame (8), the adjustment frame (8) is fixedly connected to the adapter frame (5) via fastening bolts, a strip groove (81) is provided on the adjustment frame (8) corresponding to the fastening bolts, a plurality of the strip grooves (81) are arranged in parallel, and the groove direction of the strip grooves (81) is arranged in the same direction as the axial direction of the detection rod (7).

3. A projection welding leak detection device according to claim 2, characterized in that: The plurality of proximity sensing units (9) are respectively fixedly arranged on the plurality of adjustment frames (8).

4. A projection welding leak detection device according to claim 3, characterized in that: The plurality of detection rods (7) are of equal length and their ends are arranged flush.

5. A projection welding leak detection device according to claim 4, characterized in that: Two detection rods (7) are provided, and the two detection rods (7) are respectively inserted into the two reference seats (6), and the two reference seats (6) are respectively fixedly connected to the two adapter frames (5).

6. A projection welding leak detection device according to claim 5, characterized in that: The adapter frame (5) is arranged to be raised and lowered relative to the movable limiting body (3).

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