Feeding mechanism of spot welding machine for welding belt buckle and steel wire

Abstract

A feeding mechanism of a spot welding machine for welding belt buckles and steel wires comprises a main machine and a machine frame, a guide rod is fixedly installed above the machine frame through two supporting blocks, the surface of the guide rod is sleeved with a sliding seat in a sliding mode, and a feeding rack is installed on the front side of the sliding seat; a carry air cylinder is installed in the machine frame, a telescopic shaft of the carry air cylinder is connected with a push block through a sliding rod, the upper end of the push block is connected with a feeding block through a rotating shaft, the feeding block is meshed with a feeding rack through feeding teeth, and the surface of the rotating shaft is sleeved with a torsional spring. A positioning plate is arranged on the upper side of the sliding seat, and a pressing plate is arranged above the positioning plate; a pressurizing air cylinder is arranged above the main machine, the lower end of the pressurizing air cylinder is connected with an upper electrode through a telescopic shaft, and a lower electrode is arranged on the front side of the main machine and vertically corresponds to the upper electrode. According to the automatic feeding device, the defects in the prior art are overcome, the machining effect of automatic feeding of the spot welding machine is achieved, and therefore the working intensity of workers is effectively reduced, and the machining efficiency is improved; and the stability and the consistency of the welding quality are effectively ensured.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a spot welder, and specifically to a feeding mechanism of a spot welder for welding a belt buckle and a steel wire. Background Art

[0002] The spot welder adopts the principle of double-sided double-point overcurrent welding. During operation, two electrodes are pressed on the workpiece, so that a certain contact resistance is formed between the two layers of metal under the pressure of the two electrodes. When the welding current flows from one electrode to the other electrode, instantaneous hot melting connection is formed at the two contact resistance points, and the welding current instantaneously flows from the other electrode along the two workpieces to this electrode to form a loop, without damaging the internal structure of the workpiece to be welded.

[0003] The spot welder is commonly used for connecting single belt buckles. With the spot welder, multiple belt buckles are arranged side by side and welded to a steel wire to facilitate subsequent applications. In the prior art, the spot welder mainly consists of a main body, a pressing mechanism, electrodes, a welding circuit, a control device, etc. However, it does not have a walking drive mechanism. Therefore, during the spot welding of workpieces, after welding one place, it is necessary to manually move and feed the belt buckle and steel wire to be welded, which occupies a large amount of human resources, has low efficiency, and is difficult to ensure the stability and consistency of welding quality. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a feeding mechanism of a spot welder for welding a belt buckle and a steel wire, which overcomes the deficiencies of the prior art, is reasonably designed, realizes the processing effect of automatic feeding of the spot welder. The operator only needs to place the connecting steel wire and belt buckle at the designated position without manual feeding, thereby effectively reducing the labor intensity of workers and improving the processing efficiency; and also effectively ensuring the stability and consistency of welding quality.

[0005] To achieve the above objectives, the utility model is realized through the following technical solutions:

[0006] A feeding mechanism for a spot welder used to weld a belt buckle and a steel wire, comprising a main machine and a frame. The frame is arranged on the front side of the main machine. A guide rod is fixedly installed above the frame through two support blocks. A sliding seat is slidably sleeved on the surface of the guide rod. A feeding rack is fixedly installed on the front side surface of the sliding seat. A feeding cylinder is fixedly installed inside the frame. One end of the telescopic shaft of the feeding cylinder is connected to one end of a sliding rod. The other end of the sliding rod is fixedly connected to a pushing block. A rotating shaft is fixedly installed at the upper end of the pushing block. One end of a feeding block is rotatably connected to the outer surface of the rotating shaft. The other end of the feeding block is provided with feeding teeth. The feeding teeth are engaged with the feeding rack. A torsion spring is sleeved on the surface of the rotating shaft. The two ends of the torsion spring are respectively connected to the feeding block and the pushing block. A positioning plate is fixedly installed above the sliding seat. A pressing plate is arranged above the positioning plate. The positioning plate and the pressing plate are used to fix the belt buckle.

[0007] A pressing cylinder is fixedly installed above the main machine. The lower end of the pressing cylinder is connected to the upper electrode of the spot welder through a telescopic shaft. The lower electrode of the spot welder is installed on the front side surface of the main machine. The lower electrode and the upper electrode are vertically corresponding.

[0008] Preferably, left and right clamping frames are respectively installed at both ends of the upper surface of the positioning plate. Left and right clamping grooves are respectively formed on the opposite side surfaces of the left and right clamping frames. Both ends of the pressing plate are respectively located in the left clamping groove and the right clamping groove. Left and right eccentric wheels are respectively movably installed on the left and right clamping frames through rotating shafts. The outer circumferences of the left and right eccentric wheels are respectively in contact with both ends of the upper surface of the pressing plate.

[0009] Preferably, a thrust block is fixedly installed at one end of the feeding cylinder through a mounting screw. A through hole is formed on the surface of the thrust block. A limiting block is arranged at one end of the sliding rod. The other end of the sliding rod passes through the through hole on the surface of the thrust block and is connected to the pushing block.

[0010] Preferably, a tabletop is arranged on the upper surface of the frame. A strip-shaped opening is formed on the surface of the tabletop. The upper end of the feeding block passes through the strip-shaped opening and is engaged with the feeding rack.

[0011] Preferably, a placing groove is arranged on the upper surface of the lower electrode.

[0012] The utility model provides a feeding mechanism for a spot welder used to weld a belt buckle and a steel wire. It has the following beneficial effects: By controlling the telescopic shaft of the feeding cylinder to drive the sliding rod to extend a fixed distance, and then driving the feeding block to move axially along the feeding rack by a fixed distance through the pushing block, so that through the meshing of the feeding teeth at the upper end of the feeding block with the feeding rack, the whole feeding rack can be pushed to move axially along the guiding rod by a fixed distance, and further drive the whole positioning plate to feed by a fixed distance, so that the spot welder can be controlled again to perform spot welding on the next section of the belt buckle. At the same time, when the sliding rod retracts to the initial position, through the guiding action of the inclined surface on the side of the teeth on the lower surface of the feeding rack, the feeding teeth on the upper end surface of the feeding block can move and mesh into the next tooth of the feeding rack; and so on, thus realizing the processing effect of automatic feeding of the spot welder. The operator only needs to place the connecting steel wire and the belt buckle at the designated position without manual feeding, which effectively reduces the labor intensity of workers and improves the processing efficiency; and also effectively ensures the stability and consistency of the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the prior art.

[0014] Figure 1 Structural schematic diagram of the present utility model;

[0015] Figure 2 Side view of the present utility model;

[0016] Figure 3 Structural schematic diagram of the cooperation between the pressure cylinder and the positioning plate in the present utility model;

[0017] Figure 4 Structural schematic diagram of the installation of the positioning plate in the present utility model;

[0018] Figure 5 Structural schematic diagram of the installation of the feeding rack in the present utility model;

[0019] Figure 6 Structural schematic diagram of the installation of the pressure cylinder in the present utility model;

[0020] Explanation of the reference numerals in the drawings:

[0021] 1. Main machine; 2. Frame; 3. Support block; 4. Guide rod; 5. Sliding seat; 6. Feed rack; 7. Increment cylinder; 8. Slide bar; 9. Pusher block; 10. Rotating shaft; 11. Feed block; 12. Feed teeth; 13. Torsion spring; 14. Positioning plate; 15. Pressure plate; 16. Pressurizing cylinder; 17. Upper electrode; 18. Lower electrode; 19. Left clamping frame; 20. Right clamping frame; 21. Left clamping groove; 22. Right clamping groove; 23. Left eccentric wheel; 24. Right eccentric wheel; 25. Thrust block; 26. Mounting screw; 81. Limit block. Detailed implementation mode

[0022] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the present utility model.

[0023] Example 1, as Figures 1-6 shown, a feeding mechanism of a spot welder for welding a belt buckle and a steel wire includes a main machine 1 and a frame 2. The frame 2 is fixedly installed on the front side of the main machine 1. Above the frame 2, a guide rod 4 is fixedly installed through two support blocks 3. The surface of the guide rod 4 is slidably sleeved with a sliding seat 5. The front side of the sliding seat 5 is fixedly installed with a feed rack 6. A carry cylinder 7 is fixedly installed inside the frame 2. One end of the telescopic shaft of the carry cylinder 7 is connected to one end of a slide bar 8. Among them, the moving direction of the slide bar 8, the axial direction of the feed rack 6, and the axial direction of the guide rod 4 are parallel. The other end of the slide bar 8 is fixedly connected to a pusher block 9. The upper end of the pusher block 9 is fixedly installed with a rotating shaft 10. One end of a feed block 11 is rotatably connected to the outer surface of the rotating shaft 10. The other end of the feed block 11 is provided with feed teeth 12. The feed teeth 12 are engaged with the feed rack 6. A torsion spring 13 is sleeved on the surface of the rotating shaft 10. The two ends of the torsion spring 13 are respectively connected to the feed block 11 and the pusher block 9. A positioning plate 14 is fixedly installed on the upper side of the sliding seat 5. A pressure plate 15 is arranged above the positioning plate 14. A belt buckle can be fixed between the positioning plate 14 and the pressure plate 15.

[0024] A pressurizing cylinder 16 is fixedly installed above the main machine 1. The lower end of the pressurizing cylinder 16 is connected to the upper electrode 17 of the spot welder through a telescopic shaft. The lower electrode 18 of the spot welder is installed on the front side of the main machine 1. The lower electrode 18 and the upper electrode 17 are vertically corresponding.

[0025] Working principle:

[0026] During operation, first, the sliding seat 5 is reset to the initial position at the rightmost side, so that the entire positioning plate 14 is located on the right side of the lower electrode 18 and the upper electrode 17; then the buckle to be welded is placed on the positioning plate 14 in sequence, and then the pressing plate 15 is placed on the buckle. Through the clamping action of the positioning plate 14 and the pressing plate 15, the buckle is fixed, so that the welding position of the buckle is located between the lower electrode 18 and the upper electrode 17. Then, the initial welding point of the connecting wire is correspondingly placed above the lower electrode 18, and the connecting wire and the leftmost buckle are in an overlapping state.

[0027] Then start the spot welder for welding. The upper electrode 17 is driven by the pressurizing cylinder 16 to press down, so that a certain contact resistance can be formed between the connecting wire and the buckle under the pressure of the lower electrode 18 and the upper electrode 17. When the welding current flows through one electrode to the other electrode, an instantaneous hot melt connection is formed to achieve the spot welding effect between the connecting wire and the buckle. After that, the telescopic shaft of the control carry cylinder 7 is driven to drive the slide bar 8 to extend a fixed distance, and then the push block 9 is used to drive the feed block 11 to move a fixed distance to the left along the feed rack 6. Thus, through the meshing action of the feed teeth 12 at the upper end of the feed block 11 and the feed rack 6, the entire feed rack 6 is pushed to move a fixed distance to the left along the guide rod 4, and further drives the entire positioning plate 14 to feed a fixed distance. In this embodiment, the fixed distance of feeding is equal to the pitch of the buckle installed on the positioning plate 14, so that the spot welder can be controlled again to perform spot welding on the next buckle. At the same time, the telescopic shaft of the carry cylinder 7 is also controlled to drive the slide bar 8 to return to the initial position. Since the feed block 11 is rotatably connected to the outer surface of the rotating shaft 10 and a upward elastic force is given to the feed block 11 through the torsion spring 13, through the guiding action of the inclined surface provided on the toothed side of the lower surface of the feed rack 6, the feed teeth 12 on the upper end surface of the feed block 11 can move and engage into the next tooth of the feed rack 6; repeat the above steps, and so on, thus realizing the automatic feeding processing effect of the spot welder. The operator only needs to place the connecting wire and the buckle at the designated positions without manual feeding, effectively reducing the labor intensity of the workers and improving the processing efficiency; and also effectively ensuring the stability and consistency of the welding quality.

[0028] Embodiment 2, as a further preferred solution of Embodiment 1, left clamping frames 19 and right clamping frames 20 are respectively installed at both ends of the upper surface of the positioning plate 14. Left clamping grooves 21 and right clamping grooves 22 are respectively formed on the opposite side surfaces of the left clamping frame 19 and the right clamping frame 20. Both ends of the pressing plate 15 are respectively located in the left clamping groove 21 and the right clamping groove 22. Left eccentric wheels 23 and right eccentric wheels 24 are respectively movably installed on the left clamping frame 19 and the right clamping frame 20 through rotating shafts. The outer circumferences of the left eccentric wheel 23 and the right eccentric wheel 24 are respectively in contact with both ends of the upper surface of the pressing plate 15.

[0029] After placing the buckle on the upper surface of the positioning plate 14, the pressing plate 15 can be first placed above the buckle, and then by rotating the left eccentric wheel 23 and the right eccentric wheel 24, through the pressing action of the left eccentric wheel 23 and the right eccentric wheel 24, the pressing and fixing effect of the pressing plate 15 can be achieved, thereby ensuring that the buckle can be stably fixed between the positioning plate 14 and the pressing plate 15.

[0030] Embodiment 3, as a further preferred solution of Embodiment 1, a thrust block 25 is fixedly installed at one end of the carry cylinder 7 through a mounting screw 26. A through hole is provided on the surface of the thrust block 25. A limiting block 81 is provided at one end of the sliding rod 8. The other end of the sliding rod 8 passes through the through hole on the surface of the thrust block 25 and is connected to the pushing block 9. The movement position of the sliding rod 8 can be limited through the thrust block 25. When the sliding rod 8 extends forward, the limiting block 81 at one end of the sliding rod 8 can cooperate with the thrust block 25 for limiting. When the sliding rod 8 retracts, the pushing block 9 can cooperate with the thrust block 25 for limiting, so as to ensure that each time the sliding rod 8 extends and retracts, the entire positioning plate 14 can be driven to feed a fixed distance.

[0031] Embodiment 4, as a further preferred solution of Embodiment 1, a desktop is provided on the upper surface of the frame 2. A strip-shaped opening is provided on the surface of the desktop. The upper end of the feeding block 11 passes through the strip-shaped opening and meshes with the feeding rack 6. By arranging components such as the carry cylinder 7 below the desktop, only the upper end of the feeding block 11 passes through the strip-shaped opening to push the feeding rack 6, thereby effectively ensuring the safety of the operator.

[0032] Embodiment 5, as a further preferred solution of Embodiment 1, a placement groove is provided on the upper surface of the lower electrode 18. This is beneficial to the guiding and positioning effect of the connecting wire.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A feeding mechanism for a spot welder used to weld a belt buckle and a steel wire, characterized in that: It includes a main machine (1) and a frame (2). The frame (2) is arranged on the front side of the main machine (1). Above the frame (2), a guide rod (4) is fixedly installed through two support blocks (3). A sliding seat (5) is slidably sleeved on the surface of the guide rod (4). A feed rack (6) is fixedly installed on the front side surface of the sliding seat (5). A carry cylinder (7) is fixedly installed inside the frame (2). One end of the telescopic shaft of the carry cylinder (7) is connected to one end of a slide rod (8). The other end of the slide rod (8) is fixedly connected to a push block (9). A rotating shaft (10) is fixedly installed at the upper end of the push block (9). One end of a feed block (11) is rotatably connected to the outer surface of the rotating shaft (10). The other end of the feed block (11) is provided with a feed tooth (12). The feed tooth (12) meshes with the feed rack (6). A torsion spring (13) is sleeved on the surface of the rotating shaft (10). The two ends of the torsion spring (13) are respectively connected to the feed block (11) and the push block (9). A positioning plate (14) is fixedly installed above the sliding seat (5). A pressing plate (15) is arranged above the positioning plate (14). Between the positioning plate (14) and the pressing plate (15) is used to fix the belt buckle. A pressing cylinder (16) is fixedly installed above the main machine (1). The lower end of the pressing cylinder (16) is connected to the upper electrode (17) of the spot welder through a telescopic shaft. The lower electrode (18) of the spot welder is installed on the front side surface of the main machine (1). The lower electrode (18) and the upper electrode (17) are vertically corresponding.

2. The feeding mechanism of a spot welder for welding a belt buckle and a steel wire according to claim 1, characterized in that: On the upper surface of the positioning plate (14), a left clamping frame (19) and a right clamping frame (20) are respectively installed at both ends. On the opposite side surfaces of the left clamping frame (19) and the right clamping frame (20), a left clamping groove (21) and a right clamping groove (22) are respectively opened. The two ends of the pressing plate (15) are respectively located in the left clamping groove (21) and the right clamping groove (22). On the left clamping frame (19) and the right clamping frame (20), a left eccentric wheel (23) and a right eccentric wheel (24) are respectively movably installed through a rotating shaft. The outer circumferences of the left eccentric wheel (23) and the right eccentric wheel (24) are respectively in contact with both ends of the upper surface of the pressing plate (15).

3. The feeding mechanism of a spot welder for welding a belt buckle and a steel wire according to claim 1, characterized in that: One end of the carry cylinder (7) is fixedly installed with a thrust block (25) through a mounting screw (26). A through hole is opened on the surface of the thrust block (25). A limit block (81) is arranged at one end of the slide rod (8). The other end of the slide rod (8) passes through the through hole on the surface of the thrust block (25) and is connected to the push block (9).

4. The feeding mechanism of a spot welder for welding a belt buckle and a steel wire according to claim 1, characterized in that: A desktop is arranged on the upper surface of the frame (2). A strip-shaped opening is opened on the surface of the desktop. The upper end of the feed block (11) passes through the strip-shaped opening and meshes with the feed rack (6).

5. The feeding mechanism of a spot welder for welding a belt buckle and a steel wire according to claim 1, characterized in that: A placement groove is arranged on the upper surface of the lower electrode (18).

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