Spot welding device for double-layer support of automobile silencer

Abstract

The utility model discloses an automobile silencer double-layer support spot welding device which is characterized in that a vertical telescopic device is fixedly arranged on the bottom face of an upper installation base, and the movable end of the vertical telescopic device is fixedly connected with an upper electrode; a lower electrode and a base are fixedly arranged on the lower mounting seat; the rotating seat is rotationally connected to the base; a boss is arranged on one side of the top surface of the rotating seat, a positioning pin is fixedly arranged on the boss, and one side of the boss is an arc surface matched with the lower flange; a lateral positioning device capable of horizontally stretching and retracting is arranged on one side, far away from the boss, of the rotating seat, and the movable end of the lateral positioning device is an arc surface matched with the upper flange and the lower flange; the rotating seat is provided with a vertically-through mounting hole, the transition electrodes are mounted in the mounting hole, when the transition electrodes rotate to the position above the lower electrode, the bottoms of the transition electrodes are exactly connected with the lower electrode, and the top faces of the transition electrodes make contact with the lower support. The utility model can ensure the profile tolerance of the cambered surfaces of the upper and lower brackets and improve the production efficiency of the double-layer bracket.

Description

Technical Field

[0001] The utility model relates to the technical field of muffler bracket welding tooling, and more specifically, to a spot welding device for a double-layer bracket of an automobile muffler. Background Art

[0002] In the manufacturing of automobile mufflers, automobile mufflers need to be fixed with brackets. The muffler bracket is generally processed into two pieces of upper and lower parts by stamping using coils, and then a projection welding machine is used to weld several nuts to one of the pieces, and then a spot welding machine is used to spot weld the upper and lower pieces. While ensuring the strength, it is also necessary to ensure that the arc profile of the two brackets after spot welding is ±0.5MM. At present, manual splicing is usually used for manual spot welding, which cannot guarantee the consistency of the spot welding points and the arc profile cannot meet the ±0.5MM requirement. Utility Model Content

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described below.

[0004] In order to achieve these purposes and other advantages according to the utility model, a spot welding device for a double-layer bracket of an automobile muffler is provided, wherein the double-layer bracket comprises an upper bracket and a lower bracket, and positioning holes are symmetrically provided on the upper bracket and the lower bracket, and one side of the upper bracket has an upper flange turned up, and the corresponding side of the lower bracket has a lower flange turned down, and the spot welding device comprises:

[0005] An upper mounting seat and a lower mounting seat, wherein a vertical telescopic device is fixedly arranged on the bottom surface of the upper mounting seat, and an upper electrode is fixedly connected to a movable end of the vertical telescopic device; a lower electrode and a base are fixedly arranged on the lower mounting seat; the upper electrode and the lower electrode are arranged opposite to each other up and down;

[0006] A rotating seat, which is rotatably connected to the base; a boss is provided on one side of the top surface of the rotating seat, a positioning pin matched with the positioning hole is fixedly provided on the boss, a side of the boss corresponding to the lower flange is an arc surface matched with the lower flange, and a side of the rotating seat away from the boss is provided with a horizontally retractable lateral positioning device, and the movable end of the lateral positioning device is an arc surface matched with the upper flange and the lower flange;

[0007] A plurality of transition electrodes are provided, and a mounting hole which passes through from top to bottom is opened on the rotating seat corresponding to each of the transition electrodes. The transition electrode is installed in the mounting hole, and when the transition electrode rotates to above the lower electrode, the bottom of the transition electrode is just connected with the lower electrode, and the top surface of the transition electrode is in contact with the lower bracket.

[0008] Preferably, the lateral positioning device includes an arc-shaped positioning block and a horizontal telescopic device; the horizontal telescopic device is fixedly arranged on the rotating seat, and its movable end is fixedly connected to the arc-shaped positioning block; the side of the arc-shaped positioning block facing away from the horizontal telescopic device is an arc surface that cooperates with the upper flange and the lower flange.

[0009] Preferably, the vertical telescopic device and the horizontal telescopic device are cylinders.

[0010] Preferably, a rotating shaft and a positioning seat are fixedly provided at the bottom of the rotating seat; an axial hole matching the rotating shaft is opened on the base, and horizontal through positioning holes corresponding to each transition electrode are opened on the side wall of the axial hole; a positioning column is rotatably connected to the positioning seat.

[0011] Preferably, the transition electrodes are provided in three numbers, namely a first transition electrode, a second transition electrode and a third transition electrode distributed in a triangle, the second transition electrode and the third transition electrode are respectively provided on both sides of the first transition electrode, and the angle between the first transition electrode and the second transition electrode is 90°.

[0012] The utility model at least has the following beneficial effects:

[0013] The spot welding device for the double-layer bracket of an automobile muffler provided by the utility model can replace manual splicing and spot welding, and the upper bracket and the lower bracket are positioned by the positioning pins and the lateral positioning device on the rotating seat, and multiple transition electrodes are used to realize spot welding of multiple welding points. While ensuring the consistency of the welding points, the arc contour of the upper and lower brackets can reach the government ±0.5MM, which effectively improves the production efficiency of the double-layer bracket of the automobile muffler and reduces the labor intensity of the workers.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the double-layer bracket of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the spot welding device for the double-layer bracket of the automobile muffler of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the rotating seat of the utility model;

[0018] Figure 4 It is a top view of the rotating seat of the utility model; DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0020] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0021] like Figure 1 to Figure 4 As shown, the utility model provides a spot welding device 200 for a double-layer bracket of an automobile muffler, wherein the double-layer bracket 100 comprises an upper bracket 110 and a lower bracket 120, and positioning holes 130 are symmetrically provided on the upper bracket 110 and the lower bracket 120, and one side of the upper bracket 110 has an upturned upper flange 111, and the corresponding side of the lower bracket 120 has a downturned lower flange 121, and the spot welding device 200 comprises:

[0022] An upper mounting seat 210 and a lower mounting seat 260, wherein a vertical telescopic device 220 is fixedly disposed on the bottom surface of the upper mounting seat 210, and an upper electrode 230 is fixedly connected to the movable end of the vertical telescopic device 220; a lower electrode 250 and a base 270 are fixedly disposed on the lower mounting seat 260; the upper electrode 230 and the lower electrode 250 are disposed opposite to each other up and down;

[0023] A rotating seat 240 is rotatably connected to the base 270; a boss 245 is provided on one side of the top surface of the rotating seat 240, a positioning pin 242 matching the positioning hole 130 is fixedly provided on the boss 245, a side of the boss 245 corresponding to the lower flange 121 is a curved surface matching the lower flange 121, and a side of the rotating seat 240 away from the boss 245 is provided with a horizontally retractable lateral positioning device 290, and the movable end of the lateral positioning device 290 is a curved surface matching the upper flange 111 and the lower flange 121;

[0024] A plurality of transition electrodes 241 are provided, and a mounting hole extending from top to bottom is opened on the rotating seat 240 corresponding to each transition electrode 241. The transition electrode 241 is installed in the mounting hole, and when the transition electrode 241 rotates to above the lower electrode 250, the bottom of the transition electrode 241 is connected to the lower electrode 250, and the top surface of the transition electrode 241 is in contact with the lower bracket 120.

[0025] In this technical solution, the spot welding device 200 is used to spot weld the upper bracket 110 and the lower bracket 120 together to form the double-layer bracket 100. The rotating seat 240 positions the upper bracket 110 and the lower bracket 120 through the positioning pins 242 and the lateral positioning device 290. The number of the positioning pins 242 and the positioning holes 130 can be flexibly set according to the size of the bracket and avoid the set welding point position. The number of the transition electrodes 241 is determined according to the number of welding points. The upper electrode 230, the lower electrode 250 and the transition electrode 241 can all adopt the electrode structure used in conventional spot welding machines. First, align the upper bracket 110 and the lower bracket 120 with the positioning pin 242 in turn and place them on the boss 245. At this time, the lower flange 121 is in contact with the arc surface on one side of the boss 245. Then, adjust the length of the lateral positioning device 290 so that its movable end is in contact with the upper flange 111 and the lower flange 121 to complete the positioning of the upper bracket 110 and the lower bracket 120. During welding, the rotating seat 240 is rotated to rotate one of the transition electrodes 241 to the top of the lower electrode 250, and the two are in contact; then the upper electrode 230 is lowered by extending the vertical telescopic device 220 to press the upper bracket 120, and after power is turned on, the upper electrode 220, the upper bracket 110, the lower bracket 120, the transition electrode 240 and the lower electrode 250 are connected, and the welding of the first welding point is completed after discharge; then the vertical telescopic device 220 is retracted to make the upper electrode 230 leave the upper bracket 110, and the rotating seat 240 is rotated until the next transition electrode 241 reaches the top of the lower electrode 250, and the above process is repeated to complete the welding of the regional welding points in sequence. After welding is completed, the lateral positioning device 290 and the vertical telescopic device 220 are retracted, and the double-layer bracket 100 is taken out.

[0026] In another technical solution, the lateral positioning device includes an arc-shaped positioning block 291 and a horizontal telescopic device 292; the horizontal telescopic device 292 is fixedly arranged on the rotating seat 240, and its movable end is fixedly connected to the arc-shaped positioning block 291; the side of the arc-shaped positioning block 291 away from the horizontal telescopic device 292 is an arc surface that matches the upper flange 111 and the lower flange 121. The horizontal telescopic device 292 is used to extend and retract the lateral positioning device. When positioning, the horizontal telescopic device 292 is extended to clamp the upper flange between the side wall of the boss 245 and the arc-shaped positioning block 291, so that the side of the arc-shaped positioning block 291 away from the horizontal telescopic device 292 is in contact with the upper flange 111 and the lower flange 121 at the same time.

[0027] Specifically, the vertical telescopic device 220 and the horizontal telescopic device 292 are cylinders. In actual use, an electric or hydraulic telescopic structure can also be selected.

[0028] In another technical solution, a rotating shaft 246 and a positioning seat 280 are fixedly provided at the bottom of the rotating seat 240; an axial hole matching the rotating shaft 246 is provided on the base 270, and a horizontal through positioning hole 271 is provided on the side wall of the axial hole corresponding to each of the transition electrodes 241; a positioning column 281 is rotatably connected to the positioning seat 280. The rotating shaft 246 is rotatably provided in the axial hole, and when the position of the rotating seat 240 is adjusted, the positioning column 281 is rotated to extend into the corresponding positioning hole 271, so as to fix the rotating seat 240 and the base 270. Preferably, the positioning column 281 can be a hexagon socket screw, and a matching screw hole is provided on the positioning seat 280, and one end of the hexagon socket screw is fixed by a nut. The positions of the positioning holes 271 are arranged in a one-to-one correspondence with the transition electrodes 241, that is, when the rotating seat 240 rotates to a point where the transition electrode 241 is just located above the lower electrode 250, the positioning column 281 also happens to be aligned with the positioning hole 271 corresponding to the transition electrode 241. At this time, inserting the positioning column 281 into the positioning hole 271 can ensure stability during welding.

[0029] Furthermore, if Figure 4As shown, the transition electrode 241 is set to three, namely a first transition electrode 2411, a second transition electrode 2412 and a third transition electrode 2413 distributed in a triangle, the second transition electrode 2412 and the third transition electrode 2413 are respectively arranged on both sides of the first transition electrode 2411, and the angle between the first transition electrode 2411 and the second transition electrode 2412 is 90°. The three transition electrodes 241 correspond to three welding points respectively; during welding, the welding point corresponding to the first transition electrode 2411 is welded first, and the positioning column 281 is withdrawn from the corresponding positioning hole 271 after welding is completed; the rotating seat is rotated 90°, at which time the second transition electrode 2412 is facing the lower electrode 250, and then the positioning column 281 is inserted into the positioning hole 271 corresponding to the second transition electrode 2412, the rotating seat 240 is fixed, and welding of the second welding point is performed; after welding is completed, the positioning column 281 is withdrawn from the corresponding positioning hole 271, and the rotating seat is rotated 180°, at which time the third transition electrode 2413 is facing the lower electrode 250, and then the positioning column 281 is inserted into the positioning hole 271 corresponding to the third transition electrode 2413, the rotating seat 240 is fixed, and welding of the third welding point is performed.

[0030] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A spot welding device for a double-layer bracket of an automobile muffler, the double-layer bracket comprising an upper bracket and a lower bracket, the upper bracket and the lower bracket are symmetrically provided with positioning holes, one side of the upper bracket has an upturned upper flange, and the corresponding side of the lower bracket has a downturned lower flange, characterized in that: The spot welding device comprises: An upper mounting seat and a lower mounting seat, wherein a vertical telescopic device is fixedly arranged on the bottom surface of the upper mounting seat, and an upper electrode is fixedly connected to a movable end of the vertical telescopic device; a lower electrode and a base are fixedly arranged on the lower mounting seat; the upper electrode and the lower electrode are arranged opposite to each other up and down; A rotating seat, which is rotatably connected to the base; a boss is provided on one side of the top surface of the rotating seat, a positioning pin matched with the positioning hole is fixedly provided on the boss, a side of the boss corresponding to the lower flange is an arc surface matched with the lower flange, and a side of the rotating seat away from the boss is provided with a horizontally retractable lateral positioning device, and the movable end of the lateral positioning device is an arc surface matched with the upper flange and the lower flange; A plurality of transition electrodes are provided, and a mounting hole which passes through from top to bottom is opened on the rotating seat corresponding to each of the transition electrodes. The transition electrode is installed in the mounting hole, and when the transition electrode rotates to above the lower electrode, the bottom of the transition electrode is just connected with the lower electrode, and the top surface of the transition electrode is in contact with the lower bracket.

2. The double-layer bracket spot welding device for automobile muffler according to claim 1, characterized in that: The lateral positioning device includes an arc-shaped positioning block and a horizontal telescopic device; the horizontal telescopic device is fixedly arranged on the rotating seat, and its movable end is fixedly connected to the arc-shaped positioning block; the side of the arc-shaped positioning block away from the horizontal telescopic device is an arc surface that matches the upper flange and the lower flange.

3. The spot welding device for double-layer bracket of automobile muffler as claimed in claim 2 is characterized in that: The vertical telescopic device and the horizontal telescopic device are cylinders.

4. The double-layer bracket spot welding device for automobile muffler according to claim 1, characterized in that: A rotating shaft and a positioning seat are fixedly arranged at the bottom of the rotating seat; an axial hole matching with the rotating shaft is opened on the base, and a horizontal through positioning hole corresponding to each transition electrode is opened on the side wall of the axial hole; a positioning column is rotatably connected to the positioning seat.

5. The spot welding device for double-layer bracket of automobile muffler as claimed in claim 4, characterized in that: The transition electrodes are provided in three forms, namely a first transition electrode, a second transition electrode and a third transition electrode distributed in a triangle. The second transition electrode and the third transition electrode are respectively provided on both sides of the first transition electrode, and the angle between the first transition electrode and the second transition electrode is 90°.

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