Projection nut mistake-proofing lower electrode device

Abstract

The utility model discloses a kind of projection welding nut mistake-proof lower electrode devices, relate to automobile parts manufacturing technical field, including bracket fixed block, the inside connection of bracket fixed block has projection welding lower electrode seat, the top of projection welding lower electrode seat is connected with projection welding lower electrode, the inner side wall of projection welding lower electrode is connected with projection welding nut positioning pin, the middle part of one side of bracket fixed block is screwed with first fastening bolt, the bottom edge of bracket fixed block is connected with bakelite connecting plate by bolt, the bottom of bakelite connecting plate is provided with adjusting mechanism;The projection welding nut mistake-proof lower electrode device, when position is correct, mistake-proof pin is located in part hole, if position is not correct, the distance of wrong welding hole and part hole changes, mistake-proof pin cannot enter part hole, to position positioning is carried out, so that welding position always remains correct, avoid welding error, improve the accuracy of welding.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, specifically a projection welding nut anti-misalignment lower electrode device. Background Technology

[0002] Projection welding is widely used in the automotive manufacturing industry. With market development and the continuous increase in products, it is particularly common to weld metal parts to nuts. In the field of automotive parts manufacturing, a large number of parts have projection welded nuts. The projection welded nut process involves placing a nut with projections on a thin plate part to be welded, using a lower electrode for positioning, and pressing the upper electrode downwards onto the projection welded nut to achieve the connection and welding of the projections on the nut to the thin plate part.

[0003] Currently, for thin plate parts, because there is a hole of the same size next to the nut hole as the hole used for projection welding, the operator can easily weld the nut to the other hole next to it, resulting in the nut being welded incorrectly, which affects the subsequent assembly of parts and causes the parts to be scrapped. To address this, we have proposed a projection welding nut anti-misalignment electrode device. Utility Model Content

[0004] The purpose of this utility model is to provide a lower electrode device to prevent incorrect welding of projection welding nuts, so as to solve the problem in the prior art that in current thin plate parts, because there is a hole of the same size as the hole for projection welding nuts next to the nut hole, the operator can easily weld the nut to another hole next to it, resulting in the incorrect welding position of the nut, which affects the subsequent assembly of parts and causes the parts to be scrapped.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a projection weld nut anti-misalignment lower electrode device, comprising a bracket fixing block, a projection weld lower electrode seat connected inside the bracket fixing block, a projection weld lower electrode connected to the top of the projection weld lower electrode seat, a projection weld nut positioning pin connected to the inner side wall of the projection weld lower electrode, a first fastening bolt screwed to the middle of one side of the bracket fixing block, a bakelite connecting plate bolted to the bottom edge of the bracket fixing block, an adjustment mechanism provided at the bottom of the bakelite connecting plate, and an anti-misalignment pin bolted to the top of the adjustment mechanism.

[0006] Preferably, the adjustment mechanism includes symmetrically formed grooves on one side of the bakelite connecting plate, with sliding rods slidably connected inside the grooves, and mounting plates fixedly connected to one end of the two sliding rods.

[0007] Preferably, the anti-misalignment pin is bolted to the top of the mounting plate.

[0008] Preferably, a baffle is fixedly connected to the other end of the slide rod, and the baffle is located inside the slide groove to limit the slide rod and prevent the slide rod from falling into the slide groove.

[0009] Preferably, the adjustment mechanism further includes a mounting block fixedly connected to the bottom of the bakelite connecting plate, a screw rod rotatably connected through the middle of one side of the mounting block, a knob fixedly connected to one end of the screw rod, a threaded cylinder screwed to the outer wall of the screw rod, and a fixing plate fixedly connected to one end of the threaded cylinder.

[0010] Preferably, the outer wall of the knob is provided with anti-slip texture, and a second fastening bolt is threaded through one side of the knob to facilitate rotation of the knob. After the knob is rotated, it is easy to use the second fastening bolt to tighten it.

[0011] Preferably, the fixing plate is fixedly connected to the bottom of the mounting plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This application involves installing the projection weld nut positioning pin into the projection weld lower electrode, then assembling the projection weld lower electrode and the projection weld lower electrode seat together, and assembling the anti-misalignment pin with the mounting plate; subsequently, the bracket fixing block and the bakelite connecting plate are bolted together; finally, the bracket fixing block and the projection weld lower electrode seat are assembled together and fastened with the first fastening bolt. During operation, the projection weld nut positioning pin is the primary positioning element. Based on the theoretical distance from the center of the projection weld nut positioning pin to the center of the anti-misalignment pin, during positioning, the projection weld nut positioning pin is placed in the welding hole. When the position is correct, the anti-misalignment pin is located in the part hole. If the position is incorrect, the distance between the incorrect welding hole and the part hole changes, and the anti-misalignment pin cannot enter the part hole, thereby positioning the position and ensuring that the welding position is always correct, avoiding welding errors and improving welding accuracy.

[0014] 2. In this application, by adjusting the mechanism, rotating the knob drives the screw to rotate. Utilizing the cooperation of the sliding rod and the sliding groove, the screw rotation drives the threaded cylinder to move, thereby causing the fixed plate to move the mounting plate, which in turn moves the anti-misalignment pin. Then, rotating the second fastening bolt causes its end to abut against one side of the mounting block, securing the knob and preventing it from rotating, thus ensuring the stability of the device. Simultaneously, it allows for easy adjustment of the distance between the anti-misalignment pin and the positioning pin of the welded nut, making it suitable for different types of parts and applicable to various scenarios, thus improving the device's applicability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the anti-misalignment pin installation structure of this utility model;

[0017] Figure 3 A schematic diagram of the slide groove of this utility model is provided;

[0018] Figure 4 This is a schematic diagram of the screw mounting structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the part positioning structure of this utility model.

[0020] The following numbers are labeled in the diagram: 100, bracket fixing block; 200, projection welded lower electrode seat; 300, projection welded lower electrode; 400, projection welded nut positioning pin; 500, first fastening bolt; 600, bakelite connecting plate; 700, anti-misalignment pin; 800, adjusting mechanism; 810, slide groove; 820, slide rod; 830, mounting plate; 840, mounting block; 850, screw; 860, knob; 870, fixing plate; 880, threaded cylinder; 900, second fastening bolt. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example: Figures 1-5As shown, this utility model provides a technical solution for a projection welding nut anti-misalignment lower electrode device, including a bracket fixing block 100, a projection welding lower electrode seat 200 connected inside the bracket fixing block 100, a projection welding lower electrode 300 connected to the top of the projection welding lower electrode seat 200, a projection welding nut positioning pin 400 connected to the inner side wall of the projection welding lower electrode 300, a first fastening bolt 500 screwed to the middle of one side of the bracket fixing block 100, a bakelite connecting plate 600 bolted to the bottom edge of the bracket fixing block 100, an adjusting mechanism 800 provided at the bottom of the bakelite connecting plate 600, and an anti-misalignment pin 700 bolted to the top of the adjusting mechanism 800; by installing the projection welding nut positioning pin 400 into the projection welding lower electrode 300, and then assembling the projection welding lower electrode 300 and the projection welding lower electrode seat 200... First, the anti-misalignment pin 700 is assembled with the mounting plate 830. Then, the bracket fixing block 100 and the bakelite connecting plate 600 are bolted together. Finally, the bracket fixing block 100 is assembled with the projection welding lower electrode seat 200 and fastened with the first fastening bolt 500. During operation, the projection welding nut positioning pin 400 is used for positioning. Based on the theoretical distance from the center of the projection welding nut positioning pin 400 to the center of the anti-misalignment pin 700, the projection welding nut positioning pin 400 is placed in the welding hole during positioning. When the position is correct, the anti-misalignment pin 700 is located in the part hole. If the position is incorrect, the distance between the incorrect welding hole and the part hole changes, and the anti-misalignment pin 700 cannot enter the part hole, thus positioning the position and ensuring that the welding position is always correct, avoiding welding errors and improving welding accuracy.

[0023] Please see Figure 3 , Figure 4 and Figure 5The adjustment mechanism 800 includes symmetrically arranged grooves 810 on one side of the bakelite connecting plate 600. Sliding rods 820 are slidably connected inside the grooves 810. One end of each sliding rod 820 is fixedly connected to a mounting plate 830. Anti-misalignment pins 700 are bolted to the top of the mounting plate 830. A baffle is fixedly connected to the other end of each sliding rod 820, and the baffle is located inside the grooves 810. The adjustment mechanism 800 also includes a mounting block 840 fixedly connected to the bottom of the bakelite connecting plate 600. A screw 850 is rotatably connected through the center of one side of the mounting block 840. A knob 860 is fixedly connected to one end of the screw 850. A threaded cylinder 880 is screwed onto the outer wall of the screw 850. A fixing plate 870 is fixedly connected to one end of the threaded cylinder 880. The outer wall of the knob 860 is provided with anti-slip textures, and one side of the knob 860... A second fastening bolt 900 is threaded through the device; a fixing plate 870 is fixedly connected to the bottom of a mounting plate 830; by adjusting the mechanism 800, rotating the knob 860 drives the screw 850 to rotate. Utilizing the cooperation of the sliding rod 820 and the sliding groove 810, the screw 850 rotates, causing the threaded cylinder 880 to move, which in turn causes the fixing plate 870 to move the mounting plate 830, thereby moving the anti-misalignment pin 700. Then, rotating the second fastening bolt 900 causes its end to abut against one side of the mounting block 840, securing the knob 860 and preventing it from rotating, ensuring the stability of the device. This also allows for adjusting the distance between the anti-misalignment pin 700 and the projection-welded nut positioning pin 400, making it suitable for different types of parts and applicable to various scenarios, thus improving the device's applicability.

[0024] For example, in traditional welding methods, the presence of two holes makes it difficult to determine the correct position, easily leading to incorrect nut placement and subsequent assembly errors, ultimately resulting in part scrap. In this application, however, the cooperation of the anti-misalignment pin 700 and the projection-welded nut positioning pin 400 ensures that the anti-misalignment function is achieved by determining whether the anti-misalignment pin 700 can penetrate the part's hole. During operation, the projection-welded nut positioning pin 400 serves as the primary positioning element, based on the theoretical distance between the center of the projection-welded nut positioning pin 400 and the center of the anti-misalignment pin 700. When the nut is welded incorrectly, the anti-misalignment pin 700 cannot penetrate the corresponding hole, causing interference between the part's hole and the anti-misalignment pin 700. Only when the nut is correctly welded will the anti-misalignment pin 700 penetrate the corresponding hole, thus ensuring accurate welding and preventing part scrap.

[0025] In use, this utility model involves: installing the projection weld nut positioning pin 400 into the projection weld lower electrode 300; then assembling the projection weld lower electrode 300 and the projection weld lower electrode seat 200 together; and assembling the anti-misalignment pin 700 with the mounting plate 830. Next, the bracket fixing block 100 and the bakelite connecting plate 600 are bolted together. Finally, the bracket fixing block 100 and the projection weld lower electrode seat 200 are assembled together and fastened using the first fastening bolt 500. During operation, the projection weld nut positioning pin 400 serves as the primary positioning element. Based on the theoretical distance from the center of the projection weld nut positioning pin 400 to the center of the anti-misalignment pin 700, during positioning, the projection weld nut positioning pin 400 is placed in the welding hole. When the position is correct, the anti-misalignment pin 700 is in place. If the position is incorrect in the part hole, the distance between the incorrect welding hole and the part hole changes, and the anti-misalignment pin 700 cannot enter the part hole, thus ensuring the welding position. When positioning and welding different parts, turn the knob 860 to drive the screw 850 to rotate. With the cooperation of the slide bar 820 and the slide groove 810, when the screw 850 rotates, it drives the threaded cylinder 880 to move, thereby causing the fixing plate 870 to drive the mounting plate 830 to move, which in turn causes the anti-misalignment pin 700 to move, making it easier to change the distance between the anti-misalignment pin 700 and the projection weld nut positioning pin 400. Then tighten the second fastening bolt 900 so that the second fastening bolt 900 abuts against one side of the mounting block 840, limiting the knob 860, which is convenient for positioning different parts.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for preventing incorrect lower electrode placement in projection welding nuts, characterized in that: The device includes a bracket fixing block (100), an internally connected projection welding lower electrode seat (200), a projection welding lower electrode (300) connected to the top of the projection welding lower electrode seat (200), a projection welding nut positioning pin (400) connected to the inner side wall of the projection welding lower electrode (300), a first fastening bolt (500) screwed to the middle of one side of the bracket fixing block (100), a bakelite connecting plate (600) bolted to the bottom edge of the bracket fixing block (100), an adjustment mechanism (800) provided at the bottom of the bakelite connecting plate (600), and an anti-misalignment pin (700) bolted to the top of the adjustment mechanism (800).

2. The anti-misalignment electrode device for projection welded nuts according to claim 1, characterized in that: The adjustment mechanism (800) includes a slide groove (810) symmetrically opened on one side of the bakelite connecting plate (600), and a slide rod (820) is slidably connected inside the slide groove (810). One end of the two slide rods (820) is fixedly connected to a mounting plate (830).

3. The anti-misalignment electrode device for projection welded nuts according to claim 2, characterized in that: The anti-misalignment pin (700) is bolted to the top of the mounting plate (830).

4. The anti-misalignment lower electrode device for projection welded nuts according to claim 2, characterized in that: The other end of the slide bar (820) is fixedly connected to a baffle, and the baffle is located inside the slide groove (810).

5. The anti-misalignment electrode device for projection welded nuts according to claim 4, characterized in that: The adjustment mechanism (800) further includes a mounting block (840) fixedly connected to the bottom of the bakelite connecting plate (600). A screw (850) is rotatably connected through one side of the mounting block (840). A knob (860) is fixedly connected to one end of the screw (850). A threaded cylinder (880) is screwed to the outer wall of the screw (850). A fixing plate (870) is fixedly connected to one end of the threaded cylinder (880).

6. The anti-misalignment electrode device for projection welded nuts according to claim 5, characterized in that: The outer wall of the knob (860) is provided with anti-slip texture, and a second fastening bolt (900) is threaded through one side of the knob (860).

7. The anti-misalignment lower electrode device for projection welded nut according to claim 6, characterized in that: The fixing plate (870) is fixedly connected to the bottom of the mounting plate (830).

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