A reinforcing bar butt welding device

Abstract

The utility model relates to the technical field of steel butt joint, concretely to a steel butt welding device, including base, be provided with fixed base on the base, be provided with first hollow shaft on the fixed base, the inside of first hollow shaft is provided with first chuck, the one side of fixed base is provided with two groups of slide rails in the symmetry of first chuck, two groups of slide rails are provided with the slide table in cooperation and setting, be provided with moving seat on the slide table, the cooperation and setting of bearing seat and bearing are provided with second hollow shaft on moving seat, the one end of second hollow shaft is provided with second chuck close to fixed base, be provided with rotary drive structure on the slide table, and rotary drive structure is transmission connection with the one end of second hollow shaft away from second chuck, the cooperation and setting of chuck claw are all provided with on first chuck and second chuck, and moving drive structure is set up on the base with the cooperation of slide table, the utility model can improve steel butt welding performance, improve the effect of scrap cleaning.

Description

Technical Field

[0001] This utility model relates to the field of rebar butt welding technology, specifically a rebar butt welding device. Background Technology

[0002] In the production and processing of steel reinforcement products, it is often necessary to connect two sets of steel bars to meet the continuity requirements of engineering structures. Although traditional wire binding methods are simple to operate, relying solely on the mechanical winding of metal wire for fixation is insufficient to meet the stringent requirements of modern buildings for joint strength and seismic performance. Especially in special projects such as high-rise buildings, long-span bridges, or nuclear power plants, the tensile strength and durability of the steel bar connection directly affect the safety performance of the overall structure.

[0003] The commonly used butt welding process involves using hot-melt welding to fuse the ends of the reinforcing bars together with solder, which can significantly improve the connection strength. For example, the reinforcing bar butt welding device shown in Chinese patent document CN221134645U uses a welding torch to heat the steel bars and fill them with molten solder to achieve butt welding.

[0004] This traditional welding method is sufficient for ordinary reinforcing bars, but it has significant limitations when dealing with special materials such as high-strength reinforcing bars, weather-resistant reinforcing bars, or stainless steel reinforcing bars. First, the difference in metallurgical compatibility between the weld and the base material can easily lead to intergranular corrosion in the weld zone. Second, the joint strength formed by the weld is often lower than the strength of the high-strength reinforcing bar itself, becoming a weak point in the structure. These defects are particularly prominent when subjected to dynamic loads or corrosive environments.

[0005] Furthermore, during the butt welding of reinforcing bars, the high-temperature melting and mechanical pressure generate a large amount of impurities such as oxide scale, metal chips, and welding slag. Existing butt welding equipment typically lacks efficient chip removal devices, causing these impurities to easily accumulate in the welding area, which not only affects the operator's field of vision but may also reduce the welding quality. Utility Model Content

[0006] The purpose of this utility model is to provide a rebar butt welding device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a rebar butt welding device, comprising a base, a fixed seat on the base, a first hollow shaft on the fixed seat, a first chuck on the inner side of the first hollow shaft, two sets of slide rails symmetrically arranged on one side of the fixed seat near the first chuck, slide tables fitted on the two sets of slide rails, a movable seat on the slide tables, a second hollow shaft on the movable seat via a bearing seat and bearing fit, a second chuck on the end of the second hollow shaft near the fixed seat, a rotation drive structure on the slide tables, the rotation drive structure being connected to the end of the second hollow shaft away from the second chuck, chuck claws fitted on both the first and second chucks, and a movable drive structure fitted on the base in conjunction with the slide tables.

[0008] The present invention is further configured such that the moving drive structure includes a ball screw, which is mounted on a base via a bearing housing and bearing engagement. A screw nut is fitted onto the ball screw, and a screw motor is mounted on the base. The screw motor is connected to the ball screw via a transmission connection. A slide is mounted on the screw nut. When the screw motor is started, it controls the movement of the ball screw, thereby allowing the screw nut to drive the slide to move and adjust on the slide rail. This, in turn, enables the moving adjustment of the moving seat, thereby enabling the moving adjustment of the reinforcing bars mounted on the moving seat and the second chuck. This allows the reinforcing bars to contact another set of reinforcing bars that need to be joined, and maintain a close fit during the welding process.

[0009] The present invention is further configured such that a protective cover is provided on the base, the protective cover is located between the fixed base and the movable base, a milling assembly is installed inside the protective cover, a protective door is provided on the front of the protective cover, and a moving groove is provided on the side of the protective cover in conjunction with the movable base and the slide table. The protective cover can improve the protection of the steel bars during the butt joint process and the interface milling process after the butt joint is completed, and can prevent debris from flying outward.

[0010] The present invention is further configured such that the milling assembly includes a hydraulic cylinder, which is mounted on the top of the protective cover via a frame. A mounting seat is provided at the bottom of the hydraulic cylinder, and the mounting seat is in a limiting sliding fit with the inner wall of the protective cover. A milling head is provided on the mounting seat, and a milling structure is provided on the milling head. After the two sets of steel bars are joined by friction heat fusion welding, the mounting seat is controlled by the hydraulic cylinder to drive the milling head to descend, thereby performing surface milling operations on the joint of the steel bars through the milling structure, improving the aesthetics of the joint.

[0011] The present invention is further configured such that the milling structure includes a milling motor and a milling cutter head. The milling motor is mounted on the milling head, and the milling cutter head is mounted on the bottom end of the milling head and is connected to the output end of the milling motor. After the two sets of steel bars are joined together, the joined part needs to be milled by the milling cutter head to make the joint surface flat and improve the aesthetics of the joint surface.

[0012] The present invention is further configured such that a belt conveyor is provided on the base, the belt conveyor is located between the fixed seat and the movable seat, and is located below the first chuck and the second chuck. The tail end of the belt conveyor extends to the outside of the protective cover. Most of the debris generated during the above operation will fall on the belt conveyor and can be transported out in a timely manner through the belt conveyor, reducing the accumulation of debris in the processing area.

[0013] The present invention is further configured such that the rotation drive structure includes a drive motor, the drive motor is mounted on a slide, the output end of the drive motor is provided with a main drive wheel, the side of the second hollow shaft away from the second chuck is provided with a driven wheel, and a drive belt is provided between the main drive wheel and the driven wheel. When the drive motor is started, the main drive wheel can be controlled to rotate, and the rotation of the second hollow shaft can be controlled by the cooperation between the main drive wheel, the driven wheel and the drive belt, thereby realizing the rotation drive of the steel bar fixed on the second chuck.

[0014] The present invention is further provided with a telescopic cover between the two sides of the ball screw nut and the bearing seat. The telescopic cover is sleeved on the outside of the ball screw. The telescopic cover can improve the protection of the ball screw during operation and prevent dust and debris from adhering to the surface of the ball screw and affecting its operation.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. High-efficiency friction hot melt welding technology

[0017] This invention employs a friction fusion welding method. A drive motor rotates the moving-side reinforcing bar at high speed, causing it to rub against the end face of the fixed-side reinforcing bar until it melts, achieving a metallurgical bond at the molecular level. Compared to traditional filler metal processes, this additive-free welding method completely avoids compatibility issues between the filler metal and the base material, significantly improving weld strength and solving the problem of insufficient strength at traditional welded joints. The uniform heat-affected zone generated during rotational friction also effectively eliminates residual welding stress, significantly improving the fatigue resistance of the joint under dynamic loads.

[0018] 2. Integrated milling and automatic chip removal system

[0019] This innovative device integrates welding and milling stations within a protective enclosure. A hydraulically driven milling cutter head allows for precise finishing of the welded joint. Combined with an automatic chip removal system using a belt conveyor, it collects and transports scale, metal chips, and other impurities generated during welding and milling in real time. This design not only ensures a smooth joint surface but also solves the problem of chip accumulation affecting weld quality in traditional equipment. The sealed design of the protective enclosure and moving chute effectively prevents high-temperature chip splashing, ensuring operator safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a steel bar butt welding device according to the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the overall structure of a steel bar butt welding device according to the present invention. Figure 2 ;

[0022] Figure 3 This is a cross-sectional view of the overall mating structure of the present invention. Figure 1 ;

[0023] Figure 4 This is a cross-sectional view of the overall mating structure of the present invention. Figure 2 ;

[0024] Figure 5 This is a schematic diagram showing the positional structure of the base, fixed seat, movable seat, first chuck, second chuck, and milling cutter head in this utility model.

[0025] The components represented by each number in the attached diagram are listed below: 1. Base; 2. Fixed seat; 3. First hollow shaft; 4. First chuck; 5. Slide rail; 6. Slide table; 7. Moving seat; 8. Second hollow shaft; 9. Second chuck; 10. Claw; 11. Ball screw; 12. Screw nut; 13. Screw motor; 14. Protective cover; 15. Protective door; 16. Moving slot; 17. Hydraulic cylinder; 18. Mounting seat; 19. Milling head; 20. Milling motor; 21. Milling cutter head; 22. Belt conveyor; 23. Drive motor; 24. Main drive wheel; 25. Driven wheel; 26. Drive belt; 27. Telescopic cover. Detailed Implementation

[0026] 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.

[0027] This utility model provides a technical solution: Please refer to Figures 1-5 A rebar butt welding device includes a base 1, a fixed seat 2 on the base 1, a first hollow shaft 3 on the fixed seat 2, a first chuck 4 on the inner side of the first hollow shaft 3, two sets of slide rails 5 symmetrically arranged on one side of the fixed seat 2 and the two sets of slide rails 5 are fitted with slide tables 6, a movable seat 7 is arranged on the slide table 6, a second hollow shaft 8 is arranged on the movable seat 7 through the cooperation of bearing seats and bearings, a second chuck 9 is arranged at the end of the second hollow shaft 8 near the fixed seat 2, a rotation drive structure is arranged on the slide table 6, the rotation drive structure is connected to the end of the second hollow shaft 8 away from the second chuck 9, a chuck 10 is fitted on both the first chuck 4 and the second chuck 9, and a movable drive structure is arranged on the base 1 in conjunction with the slide table 6.

[0028] The moving drive structure includes a ball screw 11, which is mounted on the base 1 via a bearing housing and bearing. A screw nut 12 is fitted on the ball screw 11. A screw motor 13 is mounted on the base 1 and is connected to the ball screw 11. A slide table 6 is mounted on the screw nut 12. When the screw motor 13 is started, it controls the movement of the ball screw 11, thereby allowing the screw nut 12 to drive the slide table 6 to move and adjust on the slide rail 5. This, in turn, allows the moving seat 7 to move and adjust, thereby allowing the steel bars mounted on the moving seat 7 and the second chuck 9 to move and adjust, so that the steel bars can contact another set of steel bars that need to be joined and remain in contact during the welding process.

[0029] This utility model has a protective cover 14 on the base 1, which is located between the fixed base 2 and the movable base 7. A milling assembly is installed inside the protective cover 14. A protective door 15 is provided on the front of the protective cover 14. The side of the protective cover 14 is provided with a moving groove 16 to cooperate with the movable base 7 and the slide table 6. The protective cover 14 can improve the protection of the steel bars during the butt joint process and the interface milling process after the butt joint is completed, and can prevent debris from flying outward. The moving groove 16 is used to ensure the flexible movement of the slide table 6 and the movable base 7.

[0030] The milling assembly includes a hydraulic cylinder 17, which is mounted on the top of the protective cover 14 via a frame. A mounting base 18 is located at the bottom of the hydraulic cylinder 17, and the mounting base 18 slides against the inner wall of the protective cover 14. A milling head 19 is mounted on the mounting base 18, and a milling structure is provided on the milling head 19. After the two sets of reinforcing bars are joined by friction heat fusion welding, the hydraulic cylinder 17 controls the mounting base 18 to lower the milling head 19, thereby performing surface milling on the joint of the reinforcing bars through the milling structure, improving the aesthetics of the joint. In this invention, the hydraulic cylinder 17 is used in conjunction with equipment in existing hydraulic systems such as hydraulic stations.

[0031] The milling structure includes a milling motor 20 and a milling cutter head 21. The milling motor 20 is mounted on the milling head 19, and the milling cutter head 21 is mounted on the bottom end of the milling head 19 and is connected to the output end of the milling motor 20. The milling motor 20 drives the milling cutter head 21 to rotate, thereby realizing the milling operation at the joint of the two sets of steel bars. Here, the milling depth can be controlled by servo feedback or limit switches in the prior art.

[0032] This utility model features a belt conveyor 22 mounted on a base 1. The belt conveyor 22 is located between the fixed base 2 and the movable base 7, and below the second chuck 9. The tail end of the belt conveyor 22 extends to the outside of the protective cover 14. After the two sets of reinforcing bars are joined, the joined parts need to be milled using a milling cutter head 21 to make the joint surface flat and improve its aesthetics. Here, a debris guide plate or an air-blowing cleaning device can be installed on the frame of the belt conveyor as needed to enhance the debris cleaning effect. The installation of the debris guide plate and the air-blowing cleaning device can be achieved using existing technologies, and this utility model does not limit the installation of this structure, so it will not be described in detail here.

[0033] Please see Figures 1-5 As one embodiment of the rotation drive structure: The rotation drive structure includes a drive motor 23, which is mounted on the slide table 6. The output end of the drive motor 23 is provided with a main drive wheel 24. A driven wheel 25 is provided on the side of the second hollow shaft 8 away from the second chuck 9. A drive belt 26 is provided between the main drive wheel 24 and the driven wheel 25. When the drive motor 23 is started, the main drive wheel 24 can be rotated through the drive motor 23. The rotation of the second hollow shaft 8 can be controlled through the cooperation between the main drive wheel 24, the driven wheel 25 and the drive belt 26, thereby realizing the rotation drive of the steel bar fixed on the second chuck 9. The cooperation between the main drive wheel 24, the driven wheel 25 and the drive belt 26 adopts the method of synchronous belt and synchronous pulley tooth meshing transmission.

[0034] Please see Figures 1-5As one embodiment of the ball screw 11: a telescopic cover 27 is provided between the two sides of the screw nut 12 and the bearing seat. The telescopic cover 27 is sleeved on the outside of the ball screw 11. The telescopic cover 27 can improve the protection of the ball screw 11 during operation and prevent dust and debris from adhering to the surface of the ball screw 11 and affecting the operation of the ball screw 11.

[0035] In summary, the working principle and specific workflow of this utility model are as follows:

[0036] In use, the two sets of steel bars are passed through the first hollow shaft 3 and the second hollow shaft 8 respectively through the corresponding first chuck 4 and second chuck 9, and fixed by the jaws 10.

[0037] Here, the first chuck 4 and the second chuck 9 can both be one of the existing pneumatic chuck, electric chuck or mechanical chuck. In this utility model, the first hollow shaft 3, the first chuck 4, the second hollow shaft 8 and the second chuck 9 are axially aligned, and the existing steel bar guiding and conveying structure can be used for support when feeding steel bars. This is the prior art, and this utility model will not elaborate on it.

[0038] During processing, the lead screw motor 13 is controlled to run, and the ball screw 11 is controlled by the lead screw motor 13. This allows the lead screw nut 12 to drive the slide table 6 to move and adjust on the slide rail 5, thereby enabling the movement and adjustment of the moving seat 7. This allows the movement and adjustment of the steel bars installed on the moving seat 7 and the second chuck 9, so that the moving steel bars can contact another set of fixed steel bars that need to be connected and remain in contact during the welding process.

[0039] After the two sets of steel bars come into contact, the drive motor 23 is started. The drive motor 23 can control the rotation of the main drive wheel 24. The cooperation between the main drive wheel 24, the driven wheel 25 and the drive belt 26 can control the rotation of the second hollow shaft 8, thereby realizing the rotation drive of the steel bars fixed on the second chuck 9. This causes the steel bars on the moving side to rotate relative to the steel bars on the fixed side and remain in contact during rotation. This allows the joint of the two sets of steel bars to be in a hot-melt state after frictional heat generation, thus realizing frictional hot-melt welding at the joint of the two sets of steel bars.

[0040] The steel bar welding method of this utility model eliminates the need for welding materials, improves the overall quality of the connection between two sets of steel bars, and enhances the strength of the connection after the connection is made.

[0041] After the docking is completed, the clamping and fixing of the steel bar on the fixed side by the jaw 10 on the first chuck 4 can be released, and the rotation of the docked steel bar can be achieved again by the cooperation of the drive motor 23, the main drive wheel 24, the driven wheel 25 and the drive belt 26.

[0042] At the same time, the movement of the moving seat 7 is controlled by the operation of the ball screw 11, thereby driving the steel bar to move;

[0043] Simultaneously, the hydraulic cylinder 17 controls the mounting base 18 to drive the milling head 19 to descend, so that the milling cutter head 21 descends and contacts the joint of the steel bar, and the milling motor 20 is started to realize the milling operation at the joint, thereby improving the aesthetics of the joint.

[0044] Here, the milling motor 20 and the drive motor 23 can be flexibly activated according to the rotational speed:

[0045] If the drive motor 23 controls the high-speed rotation of the reinforcing bar and simultaneously controls the stable movement of the milled reinforcing bar, then the milling motor 20 can remain stationary, and the milling operation of the reinforcing bar can be achieved through the cooperation of the milling cutter head 21; if the drive motor 23 controls the low-speed rotation of the reinforcing bar and simultaneously controls the stable reciprocating movement of the milled reinforcing bar, then the milling motor 20 is controlled to run, and the milling cutter head 21 rotates at high speed to achieve the milling operation of the reinforcing bar.

[0046] Here, the movable distance of the movable seat 7 is greater than the length of the joint that needs to be milled;

[0047] During the above process, most of the debris generated during friction heat fusion welding and milling will fall onto the conveyor belt of belt conveyor 22, and the debris can be discharged out in time by belt conveyor 22 to avoid the accumulation of debris.

[0048] In this utility model, the operation of related motors and other electrical components can be controlled by a PLC control system according to a set program. The specific working process and working principle of this utility model have been described in detail. Based on the above working process and working principle, those skilled in the art should know the specific circuit connection relationship and implement it through existing technology. Furthermore, the circuit connection relationship between related electrical components and the specific driver program are not the subject of protection of this utility model, and this utility model will not elaborate on them.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rebar butt welding device, comprising a base (1), characterized in that: A fixed seat (2) is provided on the base (1). A first hollow shaft (3) is provided on the fixed seat (2). A first chuck (4) is provided on the inner side of the first hollow shaft (3). Two sets of slide rails (5) are symmetrically arranged on one side of the fixed seat (2) and the first chuck (4). A slide table (6) is provided on the two sets of slide rails (5). A movable seat (7) is provided on the slide table (6). A second hollow shaft (8) is provided on the movable seat (7) through the cooperation of the bearing seat and the bearing. A second chuck (9) is provided at the end of the second hollow shaft (8) near the fixed seat (2). A rotation drive structure is provided on the slide table (6). The rotation drive structure is connected to the end of the second hollow shaft (8) away from the second chuck (9). A chuck (10) is provided on both the first chuck (4) and the second chuck (9). A movable drive structure is provided on the base (1) in cooperation with the slide table (6).

2. The rebar butt welding device according to claim 1, characterized in that: The moving drive structure includes a ball screw (11), which is mounted on a base (1) through the cooperation of a bearing seat and a bearing. A screw nut (12) is provided on the ball screw (11). A screw motor (13) is provided on the base (1). The screw motor (13) is connected to the ball screw (11) for transmission. The slide (6) is mounted on the screw nut (12).

3. The rebar butt welding device according to claim 1, characterized in that: A protective cover (14) is provided on the base (1). The protective cover (14) is located between the fixed base (2) and the movable base (7). A milling assembly is installed inside the protective cover (14). A protective door (15) is provided on the front of the protective cover (14). A moving groove (16) is provided on the side of the protective cover (14) in cooperation with the movable base (7) and the slide (6).

4. A rebar butt welding device according to claim 3, characterized in that: The milling assembly includes a hydraulic cylinder (17), which is mounted on the top of the protective cover (14) via a frame. A mounting base (18) is provided at the bottom end of the hydraulic cylinder (17). The mounting base (18) and the inner wall of the protective cover (14) are in a limiting sliding fit. A milling head (19) is provided on the mounting base (18), and a milling structure is provided on the milling head (19).

5. A rebar butt welding device according to claim 4, characterized in that: The milling structure includes a milling motor (20) and a milling cutter head (21). The milling motor (20) is mounted on the milling head (19), and the milling cutter head (21) is mounted on the bottom end of the milling head (19) and is connected to the output end of the milling motor (20) for transmission.

6. A rebar butt welding device according to claim 4, characterized in that: A belt conveyor (22) is provided on the base (1). The belt conveyor (22) is located between the fixed seat (2) and the movable seat (7) and below the first chuck (4) and the second chuck (9). The tail end of the belt conveyor (22) extends to the outside of the protective cover (14).

7. A rebar butt welding device according to claim 1, characterized in that: The rotation drive structure includes a drive motor (23), which is mounted on a slide (6). The output end of the drive motor (23) is provided with a main drive wheel (24). A driven wheel (25) is provided on the side of the second hollow shaft (8) away from the second chuck (9). A drive belt (26) is provided between the main drive wheel (24) and the driven wheel (25).

8. A rebar butt welding device according to claim 2, characterized in that: Telescopic covers (27) are provided between the two sides of the lead screw nut (12) and the bearing seat, and the telescopic covers (27) are sleeved on the outside of the ball screw (11).

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