Full-automatic nut welding stitch welding prevention device

Abstract

The invention relates to the technical field of welding, and discloses a nut full-automatic welding stitch welding prevention device which comprises a nut, a welding workpiece is fixedly connected to the lower surface of the nut, an upper electrode is arranged on the upper surface of the welding workpiece, and a lower electrode positioning pin is arranged on the lower surface of the welding workpiece. The outer surface of the upper electrode is fixedly connected with a material control mechanism, the outer surface of the lower electrode positioning pin is fixedly connected with a feeding mechanism, the rubber air bag is expanded to fix a nut through the inclined plane pipe and the rubber air bag, and the inclined plane of the inclined plane pipe limits that only one nut is clamped at a time; by means of the hexagonal rotating sleeve and the first spring, the position of the through hole pipe is adjusted to adapt to nuts of different sizes, and the first spring is used for limiting and preventing displacement. The angle and the position of the inclined plane pipe are adjusted through the clamping jaw and the second hydraulic cylinder so as to adapt to nuts with different intervals; and a limiting groove and a third rotating plate are arranged, the number of the nuts in the feeding pipe is limited, clamping connection of the bevel pipe is not affected, it is ensured that one nut enters each time, and stitch welding is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a full-automatic nut welding device capable of preventing overlapping welding. BACKGROUND

[0002] With the development of the automobile industry, the assembly of vehicle parts using nut welding has become standardized, and the equipment for welding nuts has also become automated. The original manual nut placement welding equipment has been improved, and a nut automatic conveying device is currently used for welding nuts and plates.

[0003] The patent application with the application number CN201611029461.7 discloses a nut welding device capable of preventing overlapping welding, which comprises a spot welding machine, an electrode arm of the spot welding machine is connected to a cylinder piston rod on the spot welding machine, and a body is fixed on the spot welding machine. A positioning support and a guide support of the body are connected to a connecting plate, respectively. A guide rod passes through holes of the positioning support and the guide support and is fixed on the positioning support by a guide rod manual fixing bolt. An inductor is connected to an inductor fixing support welded to a lower end of the guide rod.

[0004] However, the nut automatic conveying device has the following disadvantages in production operation. Although the nut welding efficiency is effectively improved, it cannot ensure that only one nut is welded at the same welding position. This leads to overlapping welding problems on the surface of the welded workpiece, which directly damages the normal welding structure between the nut and the workpiece and affects the overall welding quality. In view of this situation, a full-automatic nut welding device capable of preventing overlapping welding is proposed. SUMMARY

[0005] The present application aims to provide a full-automatic nut welding device capable of preventing overlapping welding to solve the problems in the background art.

[0006] In order to solve the above technical problems, the present application provides the following technical scheme: a full-automatic nut welding device capable of preventing overlapping welding, comprising a nut, a welding workpiece fixedly connected to a lower surface of the nut, an upper electrode provided on an upper surface of the welding workpiece, a lower electrode positioning pin provided on a lower surface of the welding workpiece, a material control mechanism fixedly connected to an outer surface of the upper electrode, and a feeding mechanism fixedly connected to an outer surface of the lower electrode positioning pin.

[0007] An inclined surface pipe is internally rotatably connected to a hexagonal rotating sleeve, the hexagonal rotating sleeve is internally threadedly connected to a through-hole pipe, the through-hole pipe is internally slidably connected to a sliding rod, an outer surface of the sliding rod is slidably connected to a rubber air bag, a spring one is inserted into an outer surface of the through-hole pipe, a hydraulic cylinder one is fixedly connected to an upper surface of the through-hole pipe, and a corrugated pipe one is sleeved with the outer surface of the through-hole pipe. The corrugated pipe one is used for protecting the through-hole pipe and the sliding rod.

[0008] According to the technical scheme, the material control mechanism further comprises a rotating disc, the rotating disc is fixedly connected with the outer surface of the inclined surface pipe, the outer surface of the rotating disc is rotatably connected with a rotating plate one, the inner part of the rotating disc is rotatably connected with a jaw, the outer surface of the jaw is fixedly connected with a spring two, the outer surface of the rotating plate one is fixedly connected with a hydraulic cylinder two, the output end of the hydraulic cylinder two is fixedly connected with a sliding frame, the inner part of the sliding frame is rotatably connected with an isolation pipe one, and the isolation pipe one is used for protecting the upper electrode.

[0009] According to the technical scheme, the material control mechanism further comprises a magnetic disc, the magnetic disc is in close contact with the lower surface of the welding workpiece, the outer surface of the magnetic disc is fixedly connected with a cross adjustment device, the outer surface of the cross adjustment device is rotatably connected with a broken line device, the outer surface of the broken line device is rotatably connected with an isolation pipe two, the lower surface of the isolation pipe two is fixedly connected with a hydraulic cylinder three, and the isolation pipe two is used for protecting the lower electrode positioning pin.

[0010] According to the technical scheme, the upper surface of the spring one is in contact with the lower surface of the through-hole pipe, the lower surface of the spring one is in contact with the upper surface of the hexagonal rotating sleeve, the output end of the hydraulic cylinder one is fixedly connected with the lower surface of the sliding rod, the upper surface of the rubber air bag is in contact with the lower surface of the through-hole pipe, the lower surface of the rubber air bag is in contact with the upper surface of the sliding rod, and the inclined surface pipe and the rubber air bag are used for positioning the nut.

[0011] According to the technical scheme, the outer surface of the spring two is in contact with the upper surface of the inclined surface pipe, the rotating plate one is slidingly connected with the sliding frame, the inner wall of the isolation pipe one is fixedly connected with the outer surface of the upper electrode, the output end of the hydraulic cylinder three is fixedly connected with the upper surface of the broken line device, the inner wall of the isolation pipe two is fixedly connected with the outer surface of the lower electrode positioning pin, and the hydraulic cylinder three is used for adjusting the up-down position of the welding workpiece.

[0012] According to the technical scheme, the feeding mechanism comprises a through-hole disc, the through-hole disc is rotatably connected with the broken line device, the outer surface of the through-hole disc is fixedly connected with a hydraulic cylinder four, the outer surface of the hydraulic cylinder four is fixedly connected with a hexagonal clamping sleeve, the inner wall of the hexagonal clamping sleeve is fixedly connected with a feeding pipe, the inner wall of the feeding pipe is fixedly connected with a rotating plate two, the outer surface of the rotating plate two is fixedly connected with a torsion spring, the outer surface of the torsion spring is fixedly connected with a rotating plate three, and the rotating plate three is used for supporting the nut.

[0013] According to the technical scheme, the feeding mechanism further comprises a rotating frame fixedly connected with the outer surface of the hexagonal sleeve, a first rotating sleeve rotatably connected in the rotating frame, a screw threadedly connected in the first rotating sleeve, a limiting groove fixedly connected at the top of the screw, a magnetic ring fixedly connected with the outer surface of the screw, a fixing sleeve fixedly connected with the outer surface of the magnetic ring, a motor fixedly connected with the outer surface of the fixing sleeve, and a corrugated pipe two inserted with the outer surface of the screw and used for protecting the screw.

[0014] According to the technical scheme, the third rotating plate is rotatably connected with the second rotating plate, the distance between the upper surface of the limiting groove and the lower surface of the rotating frame is equal to the height of the nut, the outer surface of the third rotating plate is in contact with the outer surface of the nut, and the limiting groove is used for positioning the nut.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. The nut full-automatic welding anti-stacking device is characterized in that the inclined pipe and the rubber air bag are arranged, the rubber air bag is expanded to fix the nut when the nut contacts the inner wall of the inclined pipe, the inclined surface of the inclined pipe limits the nut entering the pipe, only one nut can be clamped in the inclined pipe at a time, and stacking is avoided.

[0017] 2. The nut full-automatic welding anti-stacking device is characterized in that the hexagonal rotating sleeve and the spring one are arranged, the rotating of the hexagonal rotating sleeve drives the through-hole pipe to adjust the position, the height of the rubber air bag is changed, the rubber air bag can adapt to nuts of different sizes in the inclined pipe and stably fix the nuts, and the spring one elastically pushes to limit the through-hole pipe and avoid displacement of the through-hole pipe during operation.

[0018] 3. The nut full-automatic welding anti-stacking device is characterized in that the pawl and the hydraulic cylinder two are arranged, the inclined pipe is counterclockwise rotated to drive the pawl to rotate in the first rotating plate, the angle of the inclined pipe is adjusted, the spring two pushes the pawl to fix, the hydraulic cylinder two adjusts the position of the inclined pipe through a pushing action, and the inclined pipe can adapt to nuts of different distances.

[0019] 4. The nut full-automatic welding anti-stacking device is characterized in that the limiting groove and the third rotating plate are arranged, the distance between the limiting groove and the rotating frame limits the number of nuts entering the feeding pipe, the third rotating plate is downward rotated when the inclined pipe clamps the nut, the clamping action of the inclined pipe is not affected, and only one nut enters the inclined pipe at a time. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the present application.

[0021] Figure 2The structural diagram of the inclined pipe of the present application;

[0022] Figure 3 The structural section view of the inclined pipe of the present application;

[0023] Figure 4 The structural section view of the rotating disc of the present application;

[0024] Figure 5 The structural diagram of the magnetic disc of the present application;

[0025] Figure 6 The structural section view of the through-hole disc of the present application;

[0026] Figure 7 The structural explosion view of the rotating plate two of the present application;

[0027] Figure 8 The structural section view of the rotating frame of the present application.

[0028] In the figure: 1, nut; 2, welding workpiece; 21, upper electrode; 22, lower electrode positioning pin; 3, material control mechanism; 31, inclined pipe; 311, hexagonal rotating sleeve; 312, through-hole pipe; 313, sliding rod; 314, rubber air bag; 315, spring one; 316, hydraulic cylinder one; 317, corrugated pipe one; 32, rotating disc; 321, claw; 322, spring two; 323, rotating plate one; 324, hydraulic cylinder two; 325, sliding frame; 326, isolation pipe one; 33, magnetic disc; 331, cross adjustment device; 332, broken line device; 333, hydraulic cylinder three; 334, isolation pipe two; 4, feeding mechanism; 41, through-hole disc; 411, hydraulic cylinder four; 412, hexagonal clamping sleeve; 413, feeding pipe; 414, rotating plate two; 415, torsional spring; 416, rotating plate three; 42, rotating frame; 421, first rotating sleeve; 422, screw rod; 423, limiting groove; 424, magnetic ring; 425, fixed sleeve; 426, motor; 427, corrugated pipe two. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments of the present application.

[0030] Examples of the described embodiments are shown in the drawings, in which the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0031] In the present application, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] Embodiment one: refer to Figures 1-5 The present application provides a technical scheme: a nut full-automatic welding device for preventing overlapping welding, comprising a nut 1, a welding workpiece 2 fixedly connected to the lower surface of the nut 1, an upper electrode 21 arranged on the upper surface of the welding workpiece 2, a lower electrode positioning pin 22 arranged on the lower surface of the welding workpiece 2, a material control mechanism 3 fixedly connected to the outer surface of the upper electrode 21, and a feeding mechanism 4 fixedly connected to the outer surface of the lower electrode positioning pin 22.

[0033] The inclined pipe 31 is internally rotatably connected with a hexagonal rotating sleeve 311, the hexagonal rotating sleeve 311 is internally threadedly connected with a through-hole pipe 312, the through-hole pipe 312 is internally slidably connected with a sliding rod 313, the outer surface of the sliding rod 313 is slidably connected with a rubber air bag 314, the outer surface of the through-hole pipe 312 is inserted with a spring 315, the upper surface of the through-hole pipe 312 is fixedly connected with a hydraulic cylinder 316, and the outer surface of the through-hole pipe 312 is sleeved with a corrugated pipe 317, which is used for protecting the through-hole pipe 312 and the sliding rod 313.

[0034] The material control mechanism 3 further comprises a rotating disc 32 fixedly connected with the outer surface of the inclined pipe 31, the outer surface of the rotating disc 32 is rotatably connected with a rotating plate 323, the rotating disc 32 is internally rotatably connected with a clamping jaw 321, the outer surface of the clamping jaw 321 is fixedly connected with a spring 322, the outer surface of the rotating plate 323 is fixedly connected with a hydraulic cylinder 324, the output end of the hydraulic cylinder 324 is fixedly connected with a sliding frame 325, and the sliding frame 325 is internally rotatably connected with an isolation pipe 326, which is used for protecting the upper electrode 21.

[0035] The material control mechanism 3 further comprises a magnetic disc 33 abutting with the lower surface of the welding workpiece 2, the outer surface of the magnetic disc 33 is fixedly connected with a cross adjusting device 331, the outer surface of the cross adjusting device 331 is rotatably connected with a broken line device 332, the outer surface of the broken line device 332 is rotatably connected with an isolation pipe 334, the lower surface of the isolation pipe 334 is fixedly connected with a hydraulic cylinder 333, and the isolation pipe 334 is used for protecting the lower electrode positioning pin 22.

[0036] The upper surface of the spring 315 is in contact with the lower surface of the through-hole pipe 312, the lower surface of the spring 315 is in contact with the upper surface of the hexagonal rotating sleeve 311, the output end of the hydraulic cylinder 316 is fixedly connected with the lower surface of the sliding rod 313, the upper surface of the rubber air bag 314 is in contact with the lower surface of the through-hole pipe 312, the lower surface of the rubber air bag 314 is in contact with the upper surface of the sliding rod 313, and the inclined pipe 31 and the rubber air bag 314 are used for positioning the nut 1.

[0037] The outer surface of the spring 322 is in contact with the upper surface of the inclined pipe 31, the rotating plate 323 is slidingly connected with the sliding frame 325, the inner wall of the isolation pipe 326 is fixedly connected with the outer surface of the upper electrode 21, the output end of the hydraulic cylinder 333 is fixedly connected with the upper surface of the fold line device 332, the inner wall of the isolation pipe 334 is fixedly connected with the outer surface of the lower electrode positioning pin 22, the hydraulic cylinder 333 is used for adjusting the up-down position of the welded workpiece 2, when the nut 1 is clamped in the inclined pipe 31, the horizontal movement of the cross adjusting device 331 and the vertical movement of the hydraulic cylinder 333 are used to facilitate the clamping of the nut 1 in the inclined pipe 31, and when the hydraulic cylinder 316 adjusts the distance between the through-hole pipe 312 and the sliding rod 313, the hydraulic cylinder 316 is pushed by the bellows 317 to prevent external impurities from affecting the sliding of the through-hole pipe 312 and the sliding rod 313.

[0038] In the production operation of the nut automatic conveying device, although the nut welding efficiency is effectively improved, it cannot ensure that only one nut is welded at the same welding position, resulting in the problem of overlapping welding on the surface of the welded workpiece, so the material control mechanism 3 is needed to limit the single clamping of the nut 1, so that only one nut 1 can be clamped at a time, to avoid overlapping welding.

[0039] The working principle of the embodiment is as follows: when the nut full-automatic welding anti-overlapping welding device is used, the welding workpiece 2 is attached to the surface of the magnetic disc 33, at the same time, the hydraulic cylinder two 324 pushes the sliding frame 325, the position of the isolation pipe one 326 and the rotating plate one 323 is adjusted, the center of the inclined pipe 31 is coincided with the axis of the through hole of the welding workpiece 2, the axis of the isolation pipe one 326 is coincided with the axis of the through hole adjacent to the welding workpiece 2, at this time, the hexagonal rotating sleeve 311 is rotated and the through hole pipe 312 is rotated and moved up and down, the position of the rubber air bag 314 is adjusted, the position of the rubber air bag 314 is limited after expansion, the outer surface of the nut 1 is in contact with the inner wall of the inclined pipe 31, and the position of the hexagonal rotating sleeve 311 is elastically pushed and fixed by the pushing of the spring one 315, at this time, the nut 1 is clamped in the inclined pipe 31, the outer surface of the nut 1 is in contact with the inclined surface of the inner wall of the inclined pipe 31, at this time, the hydraulic cylinder one 316 pushes the sliding rod 313 upwards, the distance between the sliding rod 313 and the through hole pipe 312 is adjusted, the rubber air bag 314 is squeezed, the rubber air bag 314 is expanded around, so that the nut 1 in the inclined pipe 31 is fixed, at this time, the hydraulic cylinder three 333 drives the fold line device 332 and the cross adjustment device 331 to move upwards, so that the magnetic disc 33 and the nut 1 move upwards, the upper surface of the magnetic disc 33 is in contact with the lower surface of the nut 1 clamped in the inclined pipe 31, at this time, the hydraulic cylinder one 316 is reversely pushed, the rubber air bag 314 is contracted, the rubber air bag 314 moves downwards in the through hole of the welding workpiece 2, the fixing of the nut 1 is released, at this time, the welding workpiece 2 and the nut 1 are moved horizontally and stably by the horizontal adjustment of the hexagonal rotating sleeve 311, so that the nut 1 is coincided with the axis of the upper electrode 21, at this time, the hydraulic cylinder three 333 pushes the fold line device 332, the lower electrode positioning pin 22 positions the welding workpiece 2 and the nut 1, at this time, the upper electrode 21 moves downwards and welds the upper electrode 21 and the nut 1, after welding, the welding workpiece 2 moves upwards driven by the hydraulic cylinder three 333, so that the welding workpiece 2 moves away from the lower electrode positioning pin 22, so that the position of the welding workpiece 2 is adjusted by the cross adjustment device 331 and the fold line device 332, so that the different positions of the welding workpiece 2 are welded.

[0040] Embodiment two: please refer to Figures 6-8 On the basis of the embodiment one, the application provides a technical scheme: the feeding mechanism 4 comprises a through hole disc 41, the through hole disc 41 is rotationally connected with the fold line device 332, the outer surface of the hydraulic cylinder four 411 is fixedly connected with the through hole disc 41, the inner wall of the hexagonal clamping sleeve 412 is fixedly connected with the feeding pipe 413, the outer surface of the rotating plate two 414 is fixedly connected with the torsional spring 415, the outer surface of the torsional spring 415 is fixedly connected with the rotating plate three 416, and the rotating plate three 416 is used for supporting the nut 1.

[0041] The feeding mechanism 4 further comprises a rotating frame 42 fixedly connected with the outer surface of the hexagonal sleeve 412, the rotating frame 42 is rotatably connected with a first rotating sleeve 421 in the inside, the first rotating sleeve 421 is screwedly connected with a screw rod 422 in the inside, the top of the screw rod 422 is fixedly connected with a limiting groove 423, the outer surface of the screw rod 422 is fixedly connected with a magnetic ring 424, the outer surface of the magnetic ring 424 is fixedly connected with a fixed sleeve 425, the outer surface of the fixed sleeve 425 is fixedly connected with a motor 426, the outer surface of the screw rod 422 is inserted with a corrugated pipe two 427, and the corrugated pipe two 427 is used for protecting the screw rod 422.

[0042] The rotating plate three 416 is rotatably connected with the rotating plate two 414, the distance from the upper surface of the limiting groove 423 to the lower surface of the rotating frame 42 is equal to the height of the nut 1, the outer surface of the rotating plate three 416 is in contact with the outer surface of the nut 1, the limiting groove 423 is used for positioning the nut 1, when the motor 426 drives the screw rod 422 to rotate through the fixed sleeve 425 and the magnetic ring 424, the screw rod 422 is driven to rotate through the limitation of the magnetic ring 424, when it is necessary to maintain and replace the motor 426, the magnetic ring 424 loses the magnetic property, the motor 426 and the fixed sleeve 425 are moved out, and are replaced, when the screw rod 422 is screwedly rotated with the first rotating sleeve 421, the screw rod 422 is protected through 417, and the influence of external impurities is avoided.

[0043] When the inside of the inclined pipe 31 is clamped by the nut automatic conveying device, it is difficult to feed on the outer surface of the rubber air bag 314 due to the inclination of the inclined pipe 31, so the feeding mechanism 4 is needed to assist the nut 1 to be fed, so that the nut 1 can be stably clamped into the inside of the inclined pipe 31, and the nut 1 can be continuously and stably fed.

[0044] The working principle of the embodiment is as follows: when the nut full-automatic welding anti-overlapping device is used, the isolation pipe one 326 is rotated by an external device when the nut 1 is inserted into the inclined pipe 31, so as to drive the inclined pipe 31 to rotate to the upper side of the feeding pipe 413 and coincide with the axis of the feeding pipe 413, at this time, the nut 1 is pushed into the limiting groove 423 and falls into the inside of the limiting groove 423, and the nut 1 is supported by the inclined surface of the limiting groove 423, so that the nut 1 remains horizontal, at this time, the motor 426 rotates to drive the fixed sleeve 425 to rotate, and the limiting groove 423 is driven to rotate by the limiting of the magnetic ring 424, so as to drive the nut 1 to move upward by the threaded connection between the screw rod 422 and the first rotating sleeve 421, when the outer surface of the rotating plate three 416 contacts the surface of the nut 1 in the limiting groove 423, the limiting groove 423 is clamped by the three sets of symmetrically arranged rotating plate threes 416 through the torsion of the torsion spring 415, at this time, the motor 426 continues to rotate and pushes the nut 1, so that the nut 1 protrudes from the feeding pipe 413, then the motor 426 reverses, drives the limiting groove 423 to move downward, so that the nut 1 is separated from the limiting groove 423, at this time, when the magnetic disc 33 drives the broken line device 332 to move upward, the broken line device 332 slides on the surface of the isolation pipe two 334 through the rotating connection between the broken line device 332 and the through hole disc 41, drives the feeding mechanism 4 and the nut 1 to move upward as a whole, so that the nut 1 is clamped with the inner wall of the inclined pipe 31, and the nut 1 is fixed by the rubber air bag 314, so that the nut 1 is clamped and fixed with the inclined pipe 31, at this time, the nut 1 coincides with the through hole axis of the welding workpiece 2 when the nut 1 is rotated by an external device, the feeding of the nut 1 is completed, and the welding of the nut 1 and the welding workpiece 2 is completed.

[0045] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0046] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or equivalently replace some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A fully automatic nut welding anti-overlap welding device, comprising a nut (1), wherein a welding workpiece (2) is fixedly connected to the lower surface of the nut (1), an upper electrode (21) is provided on the upper surface of the welding workpiece (2), a lower electrode positioning pin (22) is provided on the lower surface of the welding workpiece (2), a material control mechanism (3) is fixedly connected to the outer surface of the upper electrode (21), and a feeding mechanism (4) is fixedly connected to the outer surface of the lower electrode positioning pin (22), characterized in that, The material control mechanism (3) includes: A beveled tube (31) is rotatably connected to the inside of the beveled tube (31), a through-hole tube (312) is threadedly connected to the inside of the hexagonal rotating sleeve (311), a sliding rod (313) is slidably connected to the inside of the through-hole tube (312), a rubber airbag (314) is slidably connected to the outer surface of the sliding rod (313), a spring (315) is inserted into the outer surface of the through-hole tube (312), a hydraulic cylinder (316) is fixedly connected to the upper surface of the through-hole tube (312), and a corrugated tube (317) is sleeved on the outer surface of the through-hole tube (312). The corrugated tube (317) is used to protect the through-hole tube (312) and the sliding rod (313).

2. The fully automatic nut welding anti-overlap welding device according to claim 1, characterized in that: The material control mechanism (3) also includes a rotating disk (32), which is fixedly connected to the outer surface of the inclined tube (31). A rotating plate (323) is rotatably connected to the outer surface of the rotating disk (32). A chuck (321) is rotatably connected inside the rotating disk (32). A spring (322) is fixedly connected to the outer surface of the chuck (321). A hydraulic cylinder (324) is fixedly connected to the outer surface of the rotating plate (323). A sliding frame (325) is fixedly connected to the output end of the hydraulic cylinder (324). An isolation tube (326) is rotatably connected inside the sliding frame (325). The isolation tube (326) is used to protect the upper electrode (21).

3. The fully automatic nut welding anti-overlap welding device according to claim 2, characterized in that: The material control mechanism (3) also includes a magnetic disk (33), which is in contact with the lower surface of the welding workpiece (2). A cross adjustment device (331) is fixedly connected to the outer surface of the magnetic disk (33), and a zigzag device (332) is rotatably connected to the outer surface of the cross adjustment device (331). An isolation tube (334) is rotatably connected to the outer surface of the zigzag device (332), and a hydraulic cylinder (333) is fixedly connected to the lower surface of the isolation tube (334). The isolation tube (334) is used to protect the lower electrode positioning pin (22).

4. The fully automatic nut welding anti-overlap welding device according to claim 3, characterized in that: The upper surface of the first spring (315) is in contact with the lower surface of the through-hole tube (312), the lower surface of the first spring (315) is in contact with the upper surface of the hexagonal rotating sleeve (311), the output end of the first hydraulic cylinder (316) is fixedly connected to the lower surface of the sliding rod (313), the upper surface of the rubber airbag (314) is in contact with the lower surface of the through-hole tube (312), the lower surface of the rubber airbag (314) is in contact with the upper surface of the sliding rod (313), and the inclined tube (31) and the rubber airbag (314) are used to position the nut (1).

5. The fully automatic nut welding anti-overlap welding device according to claim 4, characterized in that: The outer surface of the second spring (322) is in contact with the upper surface of the inclined tube (31), the first rotating plate (323) is slidably connected to the sliding frame (325), the inner wall of the first isolation tube (326) is fixedly connected to the outer surface of the upper electrode (21), the output end of the third hydraulic cylinder (333) is fixedly connected to the upper surface of the folding device (332), the inner wall of the second isolation tube (334) is fixedly connected to the outer surface of the lower electrode positioning pin (22), and the third hydraulic cylinder (333) is used to adjust the up and down position of the welding workpiece (2).

6. The fully automatic nut welding anti-overlap welding device according to claim 3, characterized in that: The feeding mechanism (4) includes a through-hole plate (41), which is rotatably connected to the bending device (332). A hydraulic cylinder four (411) is fixedly connected to the outer surface of the through-hole plate (41). A hexagonal sleeve (412) is fixedly connected to the outer surface of the hydraulic cylinder four (411). A feeding pipe (413) is fixedly connected to the inner wall of the hexagonal sleeve (412). A rotating plate two (414) is fixedly connected to the inner wall of the feeding pipe (413). A torsion spring (415) is fixedly connected to the outer surface of the rotating plate two (414). A rotating plate three (416) is fixedly connected to the outer surface of the torsion spring (415). The rotating plate three (416) is used to support the nut (1).

7. The fully automatic nut welding anti-overlap welding device according to claim 6, characterized in that: The feeding mechanism (4) further includes a rotating frame (42), which is fixedly connected to the outer surface of the hexagonal sleeve (412). The rotating frame (42) is rotatably connected to the inside of the rotating frame (42), and a screw (422) is threadedly connected to the inside of the first rotating sleeve (421). A limit groove (423) is fixedly connected to the top of the screw (422). A magnetic ring (424) is fixedly connected to the outer surface of the screw (422). A fixing sleeve (425) is fixedly connected to the outer surface of the magnetic ring (424). A motor (426) is fixedly connected to the outer surface of the fixing sleeve (425). A second corrugated pipe (427) is inserted into the outer surface of the screw (422). The second corrugated pipe (427) is used to protect the screw (422).

8. The fully automatic nut welding anti-overlap welding device according to claim 7, characterized in that: The rotating plate three (416) is rotatably connected to the rotating plate two (414). The distance between the upper surface of the limiting groove (423) and the lower surface of the rotating frame (42) is equal to the height of the nut (1). The outer surface of the rotating plate three (416) is in contact with the outer surface of the nut (1). The limiting groove (423) is used to position the nut (1).

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