A reinforcing bar butt welding machine

Abstract

The present application relates to a kind of reinforcing steel bar butt welding machine, including including equipment frame, equipment frame bottom has wheel, annular chute is provided on the equipment frame, two first sliding blocks are slidably connected on the annular chute, the top of two first sliding blocks is fixedly connected with operating plate, several guide slots are spaced apart and set on two operating plates, several hydraulic cylinders are provided on the operating plate bottom, each guide slot is correspondingly provided with two oppositely arranged hydraulic cylinders, the push rod of the hydraulic cylinder is fixedly provided with clamping device slidably connected on guide slot;The clamping device is used to clamp reinforcing steel bar;It can be converted to the mode of butt welding for annular steel bar with notch or two straight steel bars by the position transformation of two operating plates on annular chute, and operation is simple and fast.

Description

Technical Field

[0001] This invention relates to a rebar welding machine, belonging to the technical field of building construction equipment. Background Technology

[0002] Butt welding of reinforcing bars is a common processing method in building construction. It mainly involves welding two reinforcing bars together to achieve the required length using flash welding or lap welding.

[0003] Chinese patent CN110576285A discloses a rebar butt welding machine for building construction, including an equipment frame with wheels at the bottom. A front and rear fixing device are provided on the top surface of the equipment frame, and an upper and lower welding gun are provided between the front and rear fixing devices. The upper and lower welding guns are symmetrically arranged, with the lower welding gun fixed to the top surface of the equipment frame and the upper welding gun fixed to the bottom of the top frame. The top frame is fixed to the top surfaces of the front and rear fixing devices on both sides by vertical rods. A movable fixing device is provided between the front and rear fixing devices. This machine can butt weld two straight rebars. However, during the construction of rebar cages, the rebar cages for circular beams and columns also require the welding of circular rebar rings. Existing technologies mostly cannot use a single rebar butt welding machine to weld rebars in both cases. Summary of the Invention

[0004] In order to solve the above-mentioned problems of the prior art, the present invention provides a rebar butt welding machine that can butt weld different types of rebar, thus solving the problem that the prior art can only weld rebar in one type.

[0005] The technical solution of the present invention is as follows:

[0006] A rebar butt welding machine includes a frame with wheels at the bottom. An annular groove is provided on the frame, and two first sliders are slidably connected to the annular groove. An operating plate is fixedly connected to the top of each of the two first sliders. Several guide grooves are arranged side-by-side at intervals on both operating plates. Several hydraulic cylinders are provided at the bottom of each operating plate, with each guide groove corresponding to two opposing hydraulic cylinders. A clamping device is fixedly mounted on the push rod of each hydraulic cylinder and slidably connected to the guide groove. The clamping device is used to clamp the rebar.

[0007] The clamping device includes a second slider that is slidably connected to the guide groove. A clamping block is fixedly provided on the top of the second slider, and a positioning part adapted to the wall surface of the reinforcing bar is provided on the side of the clamping block.

[0008] The clamping block has an arc-shaped notch on its side wall, and the positioning part is composed of several arc-shaped pieces that fit into the arc-shaped notch. The upper and lower ends of the arc-shaped pieces are connected to the arc-shaped notch by elastic rubber, and a spring is provided between the inner wall of the arc-shaped pieces and the arc-shaped notch.

[0009] The equipment frame has support plates vertically arranged on both sides, a baffle is arranged on the top of the support plate, a welding plate is arranged at the bottom of the baffle, and a welding device is arranged at the bottom of the welding plate.

[0010] The welding device includes two welding frames fixed to the bottom of the welding plate. A welding gun is magnetically attached to the top of the welding frame. Each welding gun has a welding head at one end. A welding machine is installed inside the welding plate. A welding connecting pipe is installed at the end of each welding gun away from the welding head. The welding gun and the welding machine are connected by the welding connecting pipe.

[0011] A fan is also installed at the bottom of the welding plate.

[0012] The equipment frame is equipped with two slide rails that run in the same direction as the guide groove. The two slide rails are respectively located on both sides of the equipment frame. An electric push rod is slidably connected to the slide rail. The output end of the electric push rod is perpendicular to the guide groove and is connected to a limit device.

[0013] The limiting device includes a fixed plate fixedly connected to the output end of an electric push rod. A screw is rotatably connected to the side wall of the fixed plate. A push plate is fixed to the other end of the screw. A threaded sleeve is screwed onto the screw. Several pull rods are rotatably hinged to the threaded sleeve. A gripping plate is rotatably hinged to the other end of the several pull rods.

[0014] The bottom of the equipment frame is provided with a lifting screw, which is threadedly connected to the equipment frame.

[0015] The equipment frame is made of heat-resistant alloy.

[0016] The present invention has the following beneficial effects:

[0017] This device slides the equipment on an annular chute to different positions, and then, with the help of clamping blocks, clamps and fixes annular reinforcing bars or two straight reinforcing bars. A welding gun then melts the surfaces to be welded, and the push rod of the outer hydraulic cylinder drives the clamping blocks to apply pressure towards the center of the annular reinforcing bar, thus completing the welding of the annular reinforcing bar. Alternatively, it can push two straight reinforcing bars until their melted surfaces are in contact, thereby completing the welding of the two straight reinforcing bars. This device is simple to operate and can complete the welding of two different types of reinforcing bars with a single device, which is convenient and cost-effective.

[0018] This device, by setting a positioning part with an elastic connection in front of the clamping block, can, when facing larger steel bars, compress the arc-shaped piece, and cooperate with the spring set between the arc-shaped piece and the clamping block to achieve the effect of the positioning part fitting the clamping block to expand the internal area, so as to fit the larger steel bars. At the same time, since the positioning part is composed of several arc-shaped pieces, it can better fit the surface curvature of the steel bar.

[0019] This device uses a limiting device at the front end of an electric push rod. After the two straight steel bars are heated and melted, the limiting device can tighten the ends of the two straight steel bars, and then the electric push rod can be activated to make the two straight steel bars fit together. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the welding of the annular steel bars of the present invention;

[0022] Figure 3 This is a schematic diagram of the welding of straight steel bars according to the present invention;

[0023] Figure 4 This is a side cross-sectional view of the clamping block of the present invention;

[0024] Figure 5 This is a front view of the clamping block of the present invention;

[0025] Figure 6 This is a top view of the welding plate of the present invention;

[0026] Figure 7 This is a schematic diagram of the limiting device structure of the present invention.

[0027] The reference numerals in the figure are as follows:

[0028] 1. Equipment frame; 2. Wheels; 3. Annular chute; 4. First slider; 5. Control panel; 6. Guide groove; 7. Hydraulic cylinder; 8. Second slider; 9. Clamping block; 10. Positioning part; 11. Spring; 12. Support plate; 13. Baffle; 14. Welding frame; 15. Welding gun; 16. Welding head; 17. Welding connecting pipe; 18. Fan; 19. Slide rail; 20. Fixing plate; 21. Screw; 22. Push plate; 23. Threaded sleeve; 24. Pull rod; 25. Gripping plate; 26. Lifting screw. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0030] Please see Figures 1 to 7 The invention provides a technical solution:

[0031] A rebar butt welding machine includes a frame 1 with wheels 2 at its bottom. An annular groove 3 is provided on the frame 1, with its center point coinciding with the center point of the frame. Two first sliders 4 are slidably connected to the annular groove 3. The tops of the two first sliders 4 are fixedly connected to the center of an operating plate 5, with the tops of the first sliders 4 higher than the top of the frame 1, i.e., a gap exists between the lower surface of the operating plate 5 and the upper surface of the frame 1. Several guide grooves 6 are arranged horizontally and parallel to each other on both operating plates 5. Several hydraulic cylinders 7 are provided at the bottom of the operating plate 5, with each guide groove 6 corresponding to two opposing hydraulic cylinders 7. A hydraulic cylinder 7 is installed at both ends of each guide groove 6. A clamping device is fixedly mounted on the push rod of the hydraulic cylinder 7 and slidably connected to the guide groove 6. The clamping device includes a second slider 8 slidably connected to the guide groove 6. A clamping block 9 is fixedly mounted on the top of the second slider 8. The clamping block 9 is located on the upper surface of the operating plate 5. A positioning part 10 adapted to the wall surface of the reinforcing bar is provided on the side of the clamping block 9. Support plates 12 are vertically mounted on both sides of the equipment frame 1. A baffle 13 is mounted on the top of the support plates 12. Since most reinforcing bar welding machines operate outdoors, they are susceptible to damage from rain and other weather conditions, leading to poor welding results. Therefore, the top baffle provides a certain degree of protection. A welding plate is installed at the bottom of the baffle 13, and a welding device is installed at the bottom of the welding plate. The welding device includes two welding frames 14 fixed to the bottom of the welding plate. The welding frames 14 have a U-shaped structure. Magnets are installed on both sides of the inner wall of the welding frames 14, and magnets are installed on both sides of the welding gun 15. The welding gun 15 is magnetically attached to the top of the welding frames 14. A welding head 16 is installed at one end of each welding gun 15. A welding machine is installed inside the welding plate. A welding connecting pipe 17 is installed at the end of each welding gun 15 away from the welding head 16. The welding gun 15 and the welding machine are connected by the welding connecting pipe 17. The welding gun 15 is set to a length sufficient to move freely on the operating plate 5. When not in use, the welding connecting pipe 17 is coiled up and placed. When needed, after the reinforcing bar is fixed by the clamping block 9, the welding gun 15 is removed and the joint to be welded on the reinforcing bar is welded. A fan 18 is also provided at the bottom of the welding plate. The air outlet of the fan 18 is aligned with the operating plate 5 at the bottom. After welding is completed, a switch is also provided on the side of the equipment frame 1. The input end of the switch is electrically connected to the output end of the external power supply. The output end of the switch is electrically connected to the input end of the fan 18. The fan 18 can blow air on the weld after welding to allow the weld to cool down quickly.

[0032] This device can switch between welding a notched annular steel bar and welding two straight steel bars by sliding the two operating plates 5 to different positions through the annular groove 3 and then clamping them with the clamping block 9. The annular steel bar to be welded is bent into a notched arc shape before welding.

[0033] The operation mode for butt welding of ring-shaped reinforcing bars is as follows: Figure 2 As shown, the two operating plates 5 are slid side by side through the annular slide groove 3. At this time, the annular steel bar is placed in half on the surface of the two operating plates 5 respectively, with the notch to be welded facing the center point of the operating plate 5. Then, the hydraulic cylinder 7 on the guide groove 6 drives the clamping block 9 to move on the guide groove 6, thereby completing the clamping and fixing of the annular steel bar. The two clamping blocks 9 are set opposite to each other on the guide groove 6, that is, there is a clamping block 9 attached to the left and right sides of the annular steel bar. After the clamping blocks are fixed, the welding gun 15 can be removed to heat the two end faces of the steel bar to be welded to form a melting zone. Then, the hydraulic cylinder 7 of the clamping block 9 on the inner side of the annular steel bar is controlled to retract. At this time, the annular steel bar only receives the force of the clamping block 9 on the outer side. The push rod of the hydraulic cylinder 7 of the clamping block 9 on the outer side of the annular steel bar is controlled to apply pressure towards the center of the annular steel bar, so that the melting zones of the two end faces are attached, thereby realizing the butt welding of the notch of the annular steel bar.

[0034] The operation mode for butt welding two straight steel bars is as follows: Figure 3 As shown, when the two operating plates 5 are slid to a parallel position through the annular groove 3, two straight steel bars are placed on the surfaces of the two operating plates 5 respectively. The hydraulic cylinder 7 on the operating plate 5 is activated to drive the clamping block 9 to clamp and fix the two straight steel bars. At this time, the two straight steel bars are on the same horizontal line. The welding gun 15 can be removed to heat the two ends of the two straight steel bars to be welded to form a melting zone. Since the clamping blocks 9 on both sides only restrict the left and right displacement of the straight steel bars, but do not restrict the forward and backward movement of the straight steel bars, the two straight steel bars can be pushed forward and backward until the melting zones of the two ends are put together, thereby realizing the butt welding of the two straight steel bars.

[0035] The clamping block 9 has an arc-shaped notch on its side wall. The positioning part 10 is composed of several arc-shaped pieces that fit into the arc-shaped notch. The upper and lower ends of the arc-shaped pieces are connected to the arc-shaped notch by elastic rubber. A spring 11 is provided between the inner wall of the arc-shaped pieces and the arc-shaped notch. Since the positioning part 10 is composed of arc-shaped pieces, it can also adapt to the arc-shaped surface of the ring-shaped steel bar. At the same time, the design of the spring 11 can adapt to steel bars of different sizes. When the steel bar is large, the spring is compressed and retracts, which can increase the internal space of the clamping block 9 to accommodate steel bars of different sizes.

[0036] As a preferred embodiment, the equipment frame 1 is equipped with two slide rails 19 aligned with the guide groove 6. The two slide rails 19 are respectively located on both sides of the equipment frame 1. An electric push rod is slidably connected to each slide rail 19. The output end of the electric push rod is perpendicular to the guide groove 6, and a limit device is connected to the output end of the electric push rod. The limit device assists in pushing the two straight steel bars back and forth, while also stabilizing the two straight steel bars. The limit device includes a fixed plate 20 fixedly connected to the output end of the electric push rod. A screw 21 is rotatably connected to the side wall of the fixed plate. A push plate 22 is fixed to the other end of the screw 21. A threaded sleeve 23 is screwed onto the screw 21, and a rotatable push plate 22 is mounted on the threaded sleeve 23. Several tie rods 24 are hinged, and the other end of each tie rod 24 is rotatably hinged to a gripping plate 25. The gripping plate 25 is arc-shaped, and the gripping plates 25 on the tie rods 24 are arranged in a circle. When the two electric push rods are moved to the positions corresponding to the two straight steel bars, the screw rod 21 drives the threaded sleeve 23 to move on the screw rod 21. At this time, the tie rods 24 drive the gripping plate 25 to contract or expand to fit the size of the two straight steel bars. The two push plates 22 respectively abut against the ends of the two straight steel bars. Then, the electric push rods are activated to push the two straight steel bars back and forth until the melting zones of the two end faces are put together, thereby realizing the butt welding of the two straight steel bars.

[0037] A lifting screw 26 is provided at the bottom of the equipment frame 1. The lifting screw 26 is threadedly connected to the equipment frame 1. During operation, the lifting screw 26 is screwed downwards to maintain the overall stability of the device.

[0038] The equipment frame 1 is made of heat-resistant alloy, such as tungsten-nickel alloy, which can withstand temperatures of over 1,000 degrees Celsius, far exceeding the melting temperature of steel bars.

[0039] The working principle of the above-mentioned rebar welding machine is as follows:

[0040] The operation mode for butt welding of the ring-shaped steel bar is as follows: two operating plates 5 are slid to a side-by-side position through the annular slide groove 3. At this time, the ring-shaped steel bar is placed in half on the surface of the two operating plates 5 respectively, with the notch to be welded facing the center point of the operating plate 5. The hydraulic cylinder 7 on the guide groove 6 drives the clamping block 9 to move on the guide groove 6, thereby completing the clamping and fixing of the ring-shaped steel bar. The two clamping blocks 9 are set opposite to each other on the guide groove 6, that is, there is a clamping block 9 attached to the left and right sides of the ring-shaped steel bar. After the clamping blocks are fixed, the welding gun 15 can be removed to heat the two end faces of the steel bar to be welded to form a melting zone. Then, the hydraulic cylinder 7 of the clamping block 9 on the inner side of the ring-shaped steel bar is controlled to retract. At this time, the ring-shaped steel bar only receives the force of the outer clamping block 9. The push rod of the hydraulic cylinder 7 of the outer clamping block 9 on the ring-shaped steel bar is controlled to apply pressure towards the center of the ring-shaped steel bar, so that the melting zones of the two end faces are attached, thereby realizing the butt welding of the notch of the ring-shaped steel bar. At the same time, the switch is pressed to turn on the fan 18 to blow air to cool the weld.

[0041] The operation mode for butt welding two straight steel bars is as follows: When the two operating plates 5 are slid to the position of being parallel to each other through the annular slide groove 3, the two straight steel bars are placed on the surfaces of the two operating plates 5 respectively. The hydraulic cylinder 7 on the operating plate 5 is activated to drive the clamping block 9 to clamp and fix the two straight steel bars. At this time, the two straight steel bars are on the same horizontal line. The welding gun 15 can be removed to heat the two ends of the two straight steel bars to be welded to form a melting zone. Since the clamping blocks 9 on both sides only restrict the left and right displacement of the straight steel bars, but do not restrict the forward and backward movement of the straight steel bars, the two straight steel bars can be pushed forward and backward until the melting zones of the two ends are put together, thereby realizing the butt welding of the two straight steel bars. At the same time, the fan 18 is turned on by pressing the switch to blow air to cool the weld.

[0042] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A rebar butt welding machine, characterized in that: The equipment includes a frame (1), with wheels (2) at the bottom. An annular groove (3) is provided on the frame (1), and two first sliders (4) are slidably connected to the annular groove (3). An operating plate (5) is fixedly connected to the top of each of the two first sliders (4). Several guide grooves (6) are arranged side by side and spaced apart on the two operating plates (5). Several hydraulic cylinders (7) are provided at the bottom of the operating plate (5). Each guide groove (6) corresponds to two hydraulic cylinders (7) arranged in opposite directions. A clamping device is fixedly provided on the push rod of the hydraulic cylinder (7) and slidably connected to the guide groove (6). The clamping device is used to clamp the reinforcing bars. The equipment frame (1) is provided with two slide rails (19) in the same direction as the guide groove (6). The two slide rails (19) are respectively located on both sides of the equipment frame (1). An electric push rod is slidably connected on the slide rail (19). The output end of the electric push rod is perpendicular to the guide groove (6). The output end of the electric push rod is connected to a limit device. The limiting device includes a fixed plate (20) fixedly connected to the output end of the electric push rod. A screw (21) is rotatably connected to the side wall of the fixed plate (20). A push plate (22) is fixed to the other end of the screw (21). A threaded sleeve (23) is screwed onto the screw (21). Several pull rods (24) are rotatably hinged onto the threaded sleeve (23). A gripping plate (25) is rotatably hinged to the other end of the several pull rods (24).

2. The rebar welding machine as described in claim 1, characterized in that: The clamping device includes a second slider (8) that is slidably connected to the guide groove (6). A clamping block (9) is fixedly provided on the top of the second slider (8). A positioning part (10) adapted to the wall surface of the steel bar is provided on the side of the clamping block (9).

3. A rebar butt welding machine as described in claim 2, characterized in that: The clamping block (9) has an arc-shaped notch on its side wall. The positioning part (10) is composed of several arc-shaped pieces that fit into the arc-shaped notch. The upper and lower ends of the arc-shaped pieces are connected to the arc-shaped notch by elastic rubber. A spring (11) is provided between the inner wall of the arc-shaped pieces and the arc-shaped notch.

4. A rebar welding machine as described in claim 3, characterized in that: The equipment frame (1) has support plates (12) vertically arranged on both sides, a baffle (13) is arranged on the top of the support plate (12), a welding plate is arranged at the bottom of the baffle (13), and a welding device is arranged at the bottom of the welding plate.

5. A rebar welding machine as described in claim 4, characterized in that: The welding device includes two welding frames (14) fixed to the bottom of the welding plate. The top of the welding frame (14) is magnetically attached to a welding gun (15). Each welding gun (15) has a welding head (16) at one end. The welding plate contains a welding machine. Each welding gun (15) has a welding connecting pipe (17) at the end away from the welding head (16). The welding gun (15) and the welding machine are connected by the welding connecting pipe (17).

6. A rebar butt welding machine as described in claim 5, characterized in that: A fan (18) is also provided at the bottom of the welding plate.

7. A rebar butt welding machine as described in claim 1, characterized in that: The bottom of the equipment frame (1) is provided with a lifting screw (26), which is threadedly connected to the equipment frame (1).

8. A rebar butt welding machine as described in claim 1, characterized in that: The equipment frame (1) is made of heat-resistant alloy.

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