Projection welding electrode assembly for preventing molded surface interference during projection welding of nut on L-shaped part

Abstract

The utility model discloses a projection welding electrode assembly for preventing molded surface interference during nut projection welding of an L-shaped part, which relates to the technical field of projection welding electrode assemblies and comprises a projection welding machine, an upper electrode arm is fixedly connected to the upper side of the left side wall of the projection welding machine, and an upper electrode holding rod is fixedly connected to the lower side of the outer side wall of the upper electrode arm. The projection welding electrode assembly comprises an upper electrode holding rod, the bottom end of the upper electrode holding rod is fixedly connected with an upper electrode assembly, the two sides of the outer side wall of the upper electrode assembly are fixedly connected with water pipe connectors, and the bottom end of the upper electrode assembly is fixedly connected with a projection welding upper electrode. The clamping pin can be rapidly replaced according to the size of a positioning hole of a part, the replaced clamping pin can stably fix the part, the part and the upper electrode can be separated through the buffer insulating plate, the upper electrode is protected, and the situation that the upper electrode makes contact with an iron material, and consequently electricity conduction occurs, and shunting is generated is prevented.

Description

Technical Field

[0001] This utility model relates to the technical field of projection welding electrode assembly, specifically a projection welding electrode assembly for preventing surface interference when projection welding nuts to L-shaped parts. Background Technology

[0002] The projection welding electrode assembly needs to be installed in the upper and lower electrode arms of the projection welding machine. The projection welding machine drives the projection welding electrode assembly to work. During operation, the lower electrode assembly is fixed, and the projection welding machine drives the upper electrode assembly to move up and down. When the upper electrode assembly falls, it presses the welding nut and connects to the lower electrode to complete one welding operation.

[0003] Existing projection welding electrode assemblies designed to prevent surface interference when projecting nuts onto L-shaped parts suffer from interference when the upper electrode falls due to the shape limitations of some nut components. During energization, the copper material contacts the iron material, causing conductivity and current shunting, which compromises the welding strength of the projection nut. Furthermore, the limiting pins in existing projection welding electrode assemblies are difficult to replace, resulting in the pins failing to securely fix parts with mismatched positioning opening sizes, thus affecting the welding effect of the projection nut. A new technical solution is needed to address this issue. Utility Model Content

[0004] 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.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a projection welding electrode assembly for preventing surface interference when projection welding nuts to L-shaped parts, comprising a projection welding machine, an upper electrode arm fixedly connected to the upper side of the left side wall of the projection welding machine, an upper electrode handle fixedly connected to the lower side of the outer side wall of the upper electrode arm, an upper electrode assembly fixedly connected to the bottom end of the upper electrode handle, water pipe connectors fixedly connected to both sides of the outer side wall of the upper electrode assembly, a projection welding upper electrode fixedly connected to the bottom end of the upper electrode assembly, a protective insulation mechanism provided below the upper electrode assembly, a lower electrode arm fixedly connected to the lower left side of the projection welding machine, a lower electrode handle fixedly connected to the top of the lower electrode arm, a lower electrode seat fixedly connected to the top end of the lower electrode handle, and a replacement mechanism provided inside the lower electrode seat. The protective insulation mechanism can buffer the impact when the upper electrode contacts the part and can provide insulation protection for the upper electrode. The replacement mechanism can quickly replace the retaining pin.

[0006] Preferably, the protective insulation mechanism includes two fixed seats, which are fixedly connected to the upper and lower sides of one side of the upper electrode assembly. An installation rod is fixedly connected between the inner sides of the upper and lower fixed seats, and a first positive magnet is fixedly connected to the inner side of the upper and lower fixed seats. The collision is buffered by the first positive magnet and the second positive magnet.

[0007] Preferably, sliders are slidably connected to the upper and lower sides of the outer side wall of the mounting rod, and buffer springs are fixedly connected to the outer sides of the upper and lower sliders. The ends of the buffer springs on the upper and lower sides are fixedly connected to the first positive magnet, so that the collision is buffered again by the buffer springs and the magnets.

[0008] Preferably, a second positive magnet is fixedly connected to the outer side of the upper and lower sliders, a connecting rod is rotatably connected to the inner side of the sliders, and a buffer insulating plate is rotatably connected to the outer side of the connecting rods on both the upper and lower sides. The buffer insulating plate separates the upper electrode from the part and protects the upper electrode.

[0009] Preferably, the replacement mechanism includes a lower electrode holder, which is fixedly connected to the top of the lower electrode handle. A quick-connect endotracheal connector is fixedly connected to the outer wall of the lower electrode holder, and a projection-welded nut for the lower electrode is screwed to the top of the lower electrode holder.

[0010] Preferably, the lower electrode base is slidably connected to a mounting base, the mounting base has slots on both sides inside, and a push spring is embedded in the inner cavity of the mounting base. The slots and the plate fix the locking pin to the mounting base.

[0011] Preferably, a locking pin is placed on the top of the mounting base, and bent locking plates are fixedly connected to both sides of the bottom of the locking pin. The bottom of the bent locking plates extends into the inner cavity of the slot and engages with the slot. A pressure rod is fixedly connected to the bottom of the locking pin, and the bottom end of the pressure rod contacts the push spring.

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

[0013] 1. This projection welding electrode assembly for preventing surface interference when projection welding nuts to L-shaped parts uses a protective insulation mechanism to buffer the impact on the upper electrode when it comes into contact with the part, and uses a buffer insulation plate to isolate the part from the upper electrode, preventing the upper electrode from conducting electricity when it comes into contact with iron material and thus generating current shunting.

[0014] 2. This projection welding electrode assembly, used for preventing surface interference when projecting welding nuts to L-shaped parts, allows for quick replacement of the locking pins according to the size of the positioning holes on the parts via a replacement mechanism, ensuring that the replaced locking pins can securely fix the parts. Attached Figure Description

[0015] Figure 1 This is a front three-dimensional structural diagram of the projection welding electrode assembly for preventing surface interference when projection welding nuts to L-shaped parts, as proposed in this utility model.

[0016] Figure 2 This is a three-dimensional structural diagram of the upper electrode assembly of the projection welding electrode assembly for preventing surface interference when projecting welding nuts to L-shaped parts, as proposed in this utility model.

[0017] Figure 3 This is a cross-sectional schematic diagram of the protective insulation mechanism of the projection welding electrode assembly for preventing surface interference when projecting welding nuts to L-shaped parts, as proposed in this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the lower electrode seat of the projection welding electrode assembly for preventing surface interference when projecting welding nuts to L-shaped parts, as proposed in this utility model.

[0019] Figure 5 This is a cross-sectional view of the replacement mechanism for the projection welding electrode assembly used to prevent surface interference when projecting welding nuts onto L-shaped parts, as proposed in this utility model.

[0020] Figure 6 This invention relates to a projection welding electrode assembly for preventing surface interference when projecting weld nuts onto L-shaped parts. Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0021] In the diagram: 100, projection welding machine; 110, upper electrode arm; 120, upper electrode grip; 130, upper electrode assembly; 131, water pipe connector; 132, projection welding upper electrode; 140, fixed base; 141, mounting rod; 142, first positive magnet; 150, slider; 151, buffer spring; 152, second positive magnet; 160, connecting rod; 170, buffer insulation plate; 200, lower electrode arm; 210, lower electrode grip; 220, lower electrode seat; 221, quick-connect air pipe connector; 230, projection welding nut lower electrode; 240, mounting base; 241, slot; 242, push spring; 250, locking pin; 251, bending locking plate; 260, pressure rod. Detailed Implementation

[0022] 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.

[0023] Example 1: Please refer to again Figure 1-6This utility model provides a projection welding electrode assembly for preventing surface interference when projection welding nuts to L-shaped parts. It includes a projection welding machine 100, an upper electrode arm 110 fixedly connected to the upper side of the left side wall of the projection welding machine 100, an upper electrode handle 120 fixedly connected to the lower side of the outer side wall of the upper electrode arm 110, an upper electrode assembly 130 fixedly connected to the bottom end of the upper electrode handle 120, water pipe connectors 131 fixedly connected to both sides of the outer side wall of the upper electrode assembly 130, a projection welding upper electrode 132 fixedly connected to the bottom end of the upper electrode assembly 130, and a protective insulation mechanism provided below the upper electrode assembly 130. The protective insulation mechanism includes two fixed seats 140, which are fixedly connected to the upper electrode assembly 130. On one side of the electrode assembly 130, an mounting rod 141 is fixedly connected to the inner side of the upper and lower fixing seats 140. A first positive magnet 142 is fixedly connected to the inner side of the upper and lower fixing seats 140. A slider 150 is slidably connected to the upper and lower sides of the outer side of the mounting rod 141. A buffer spring 151 is fixedly connected to the outer side of the upper and lower slider 150. The end of the buffer spring 151 is fixedly connected to the first positive magnet 142. A second positive magnet 152 is fixedly connected to the outer side of the upper and lower slider 150. A connecting rod 160 is rotatably connected to the inner side of the slider 150. A buffer insulating plate 170 is rotatably connected to the outer side of the connecting rod 160.

[0024] Specifically, when the upper electrode assembly 130 moves from top to bottom, the buffer insulating plate 170 contacts the irregular part, and then the buffer insulating plate 170 applies pressure to the connecting rod 160, causing the two sliders 150 connected to the two connecting rods 160 to move backward on the mounting rod 141. Then, the sliders 150 squeeze the spring, causing the buffer spring 151 to deform and buffer the impact force. At the same time, when the second positive magnet 152 on the slider 150 approaches the first positive magnet 142 on the fixed seat 140, a repulsive force is generated to further buffer the collision. Meanwhile, the buffer insulating plate 170 separates the part from the upper electrode to prevent the upper electrode assembly 130 from contacting the iron material and conducting electricity, thus causing current shunting.

[0025] Example 2: Please refer to again Figure 1-6A lower electrode arm 200 is fixedly connected to the lower left side of the projection welding machine 100. A lower electrode handle 210 is fixedly connected to the top of the lower electrode arm 200. A lower electrode seat 220 is fixedly connected to the top of the lower electrode handle 210. A replacement mechanism is provided inside the lower electrode seat 220. The replacement mechanism includes the lower electrode seat 220, which is fixedly connected to the top of the lower electrode handle 210. A quick-connect fitting 221 for an air pipe is fixedly connected to the outer wall of the lower electrode seat 220. A projection welding nut lower electrode 230 is screwed to the top of the lower electrode seat 220. The lower electrode holder 220 is internally slidably connected to a mounting base 240. The mounting base 240 has slots 241 on both sides inside. A push spring 242 is embedded in the inner cavity of the mounting base 240. A locking pin 250 is placed on the top of the mounting base 240. Bending plates 251 are fixedly connected to both sides of the bottom of the locking pin 250. The bottom of the bending plates 251 extends into the inner cavity of the slots 241 and engages with the slots 241. A pressure rod 260 is fixedly connected to the bottom of the locking pin 250. The bottom end of the pressure rod 260 contacts the push spring 242.

[0026] Specifically, when disassembling the locking pin 250, the part of the bending plate 251 extending out of the mounting base 240 is pressed down, so that the bending plate 251 with bending ability fits against the inner wall of the slot 241, so that the bent part of the bending plate 251 is in the slot 241, and the bending plate 251 removes the restriction on the locking pin 250. Then, the push spring 242, which is squeezed by the pressure rod 260, extends and pushes the pressure rod 260 to rise, so that when the locking pin 250 rises, the locking tenon is disconnected from the mounting base 240, and the replacement of the locking pin 250 is completed. After that, during installation, the bending plate 251 is simply inserted into the slot 241.

[0027] Working principle: When the upper electrode assembly 130 moves from top to bottom, the buffer insulating plate 170 contacts the irregular part. Then, the buffer insulating plate 170 applies pressure to the connecting rod 160, causing the two sliders 150 connected to the two connecting rods 160 to move backward on the mounting rod 141. Then, the sliders 150 squeeze the spring, causing the buffer spring 151 to deform and buffer the impact force. At the same time, when the S pole of the second positive magnet 152 on the slider 150 approaches the S pole of the first positive magnet 142 on the fixed base 140, a repulsive force is generated, which further buffers the collision. Meanwhile, the buffer insulating plate 170 separates the part from the upper electrode to prevent the upper electrode assembly 130 from contacting the iron material and conducting electricity, thus causing current shunting.

[0028] When disassembling the locking pin 250, the portion of the bending plate 251 extending out of the mounting base 240 is pressed down, causing the bending plate 251 with bending capability to fit against the inner wall of the slot 241, so that the bent portion of the bending plate 251 is inside the slot 241, thus removing the limiting effect of the bending plate 251 on the locking pin 250. Then, the push spring 242, which is pressed by the pressure rod 260, extends and pushes the pressure rod 260 upward, causing the locking pin 250 to rise and the locking tenon to disconnect from the mounting base 240, completing the replacement of the locking pin 250. Subsequently, during installation, simply insert the bending plate 251 into the slot 241.

[0029] 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 projection welding electrode assembly for preventing surface interference when projection welding nuts to L-shaped parts, comprising a projection welding machine (100), wherein an upper electrode arm (110) is fixedly connected to the upper side of the left side wall of the projection welding machine (100), an upper electrode handle (120) is fixedly connected to the lower side of the outer side wall of the upper electrode arm (110), an upper electrode assembly (130) is fixedly connected to the bottom end of the upper electrode handle (120), water pipe connectors (131) are fixedly connected to both sides of the outer side wall of the upper electrode assembly (130), and a projection welding upper electrode (132) is fixedly connected to the bottom end of the upper electrode assembly (130), characterized in that, A protective insulation mechanism is provided below the upper electrode assembly (130); A lower electrode arm (200) is fixedly connected to the lower left side of the projection welding machine (100). A lower electrode handle (210) is fixedly connected to the top of the lower electrode arm (200). A lower electrode seat (220) is fixedly connected to the top of the lower electrode handle (210). A replacement mechanism is provided inside the lower electrode seat (220).

2. The projection welding electrode assembly for preventing surface interference when projection welding nuts to L-shaped parts as described in claim 1, characterized in that, The protective insulation mechanism includes two fixed seats (140), which are fixedly connected to the upper and lower sides of one side of the upper electrode assembly (130). An installation rod (141) is fixedly connected between the inner sides of the upper and lower fixed seats (140), and a first positive magnet (142) is fixedly connected to the inner sides of the upper and lower fixed seats (140).

3. The projection welding electrode assembly for preventing surface interference when projection welding nuts to L-shaped parts as described in claim 2, characterized in that, The mounting rod (141) has sliders (150) slidably connected to the upper and lower sides of its outer side wall. Buffer springs (151) are fixedly connected to the outer sides of the sliders (150) on the upper and lower sides. The ends of the buffer springs (151) on the upper and lower sides are fixedly connected to the first positive magnet (142).

4. The projection welding electrode assembly for preventing surface interference when projection welding nuts to L-shaped parts as described in claim 3, characterized in that, A second positive magnet (152) is fixedly connected to the outer side of the upper and lower sliders (150), and a connecting rod (160) is rotatably connected to the inner side of the sliders (150). A buffer insulating plate (170) is rotatably connected to the outer side of the connecting rods (160) on both the upper and lower sides.

5. The projection welding electrode assembly for preventing surface interference when projection welding nuts to L-shaped parts as described in claim 1, characterized in that, The replacement mechanism includes a lower electrode holder (220), which is fixedly connected to the top of the lower electrode handle (210). A quick-connect endotracheal tube connector (221) is fixedly connected to the outer wall of the lower electrode holder (220), and a projection weld nut lower electrode (230) is screwed to the top of the lower electrode holder (220).

6. The projection welding electrode assembly for preventing surface interference when projection welding nuts to L-shaped parts as described in claim 5, characterized in that, The lower electrode seat (220) is slidably connected to a mounting base (240). The mounting base (240) has slots (241) on both sides inside. A push spring (242) is embedded in the inner cavity of the mounting base (240).

7. The projection welding electrode assembly for preventing surface interference when projection welding nuts to L-shaped parts as described in claim 6, characterized in that, A locking pin (250) is placed on the top of the mounting base (240). A bent locking plate (251) is fixedly connected to both sides of the bottom of the locking pin (250). The bottom of the bent locking plate (251) extends into the inner cavity of the slot (241) and engages with the slot (241). A pressure rod (260) is fixedly connected to the bottom of the locking pin (250). The bottom end of the pressure rod (260) contacts the push spring (242).

Images