A laser welding forming tool for reinforcing joint and a process thereof

Abstract

This invention relates to the field of rebar connection and laser welding equipment technology, and discloses a laser welding forming fixture for rebar joints and its process. The fixture includes a welding machine body and bases located on both sides of the welding machine body. Each base is equipped with a rack, an axial feeding drive mechanism, and multiple switchable feeding components. Each feeding component includes a frame, a slide, an arc-shaped seat, an adjustable support, and a clamping mechanism. The frame achieves position switching through gear and rack engagement. The slide, driven by a push plate, drives the rebars to feed towards each other and complete end-to-end contact. The welding torch on the welding machine body moves circumferentially around the joint to perform laser welding. A transmission wheel transports the welded rebar to a grinding position. The push plate also activates a cleaning component to clean the welded ends during feeding. This fixture can complete the loading and clamping of other positions simultaneously with welding, reducing equipment waiting time and improving the coaxial positioning accuracy of the rebar joints, weld consistency, and continuous processing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of laser welding machine technology, specifically, it relates to a laser welding forming tool for steel bar joints and its process. Background Technology

[0002] Laser welding machines are precision welding equipment that uses a high-energy laser beam as a heat source to locally melt and fuse metal materials, forming a strong weld after cooling. They belong to the category of precision processing equipment for fusion welding. The laser welding forming fixture for rebar joints is an integrated positioning, clamping, and forming jig assembly specifically used for butt welding of building rebars and sleeve connections. It is a special process equipment for rebar prefabrication. Its core function is to precisely and coaxially fix two rebars to be welded, control the butt gap, and complete the joint forming in one go with laser welding. This ensures the strength of the mechanical connection joint and the consistency of the weld. It is suitable for prefabricated rebar processing plants and automated production lines for rebar cages.

[0003] Existing laser welding fixtures for reinforcing bars are mostly single-station fixed structures. Each fixture has only one set of positioning and clamping mechanisms. The overall operation process is one clamping, one welding, unloading, and then reloading. This type of fixture is simple in structure and easy to debug, and can meet the needs of small-batch, scattered reinforcing bar joint welding. However, in high-volume production scenarios, the single-station fixture operation mode is a serial operation. After the welding equipment completes the welding of a workpiece, it must stop and wait for the operator to complete the unloading of the finished product, clamping of the new workpiece, and alignment and calibration. This results in a large amount of idle standby time for the welding equipment, which leads to extremely low equipment utilization and affects production efficiency. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0005] A laser welding forming fixture for rebar joints includes a welding machine body and bases respectively disposed on both sides of the welding machine body. A welding torch capable of circumferential movement around the axis of the rebar joint is mounted on the welding machine body. Each base is equipped with a transversely extending rack, an axial feeding drive mechanism, and multiple parallel feeding components. Each feeding component includes a frame, a slide, an arc-shaped seat, and a clamping mechanism. The frame is equipped with a gear meshing with the rack and a position switching drive component. By moving the gear along the rack, any feeding component can be switched to a welding position corresponding to the welding axis of the welding machine body. The slide is slidably mounted on the frame along the rebar axis. The arc-shaped seat is mounted on the slide and supports the rebar. The clamping mechanism is used to clamp and position the rebar. The axial feeding drive mechanism, through a push plate, engages with the slide at the welding position, causing the rebars on both sides of the welding machine body to move towards each other and complete end-to-end contact.

[0006] Furthermore, the axial feeding drive mechanism includes a screw, a feeding motor, and a push plate, with the screw threadedly engaging with the push plate; a support rod is provided on the slide, and the steel ball at the end of the support rod rolls in contact with the push plate. A multi-section telescopic rod, a first spring, and an auxiliary rod are provided between the frame and the slide to ensure the slide maintains linear movement during feeding and automatically resets after the push plate retracts.

[0007] Furthermore, the clamping mechanism includes clamping plates rotatably connected to both sides of the arc-shaped seat via a circular shaft, a triangular seat located on the outer side of the clamping plates, an electric telescopic rod, and a top rod. The top rod slides into the guide surface of the triangular seat. When the electric telescopic rod drives the top rod to move, the clamping plates on both sides rotate towards each other and press the reinforcing bar into the arc-shaped seat. Anti-slip pads are provided on the inner side of the clamping plates to increase friction with the ribbed reinforcing bar and reduce surface damage.

[0008] Furthermore, a perforated rod is slidably mounted on the slide block, with its outer end connected to a support. A locking mechanism adjusts the distance between the support and the arc-shaped seat by engaging with different positioning holes to accommodate steel bars of varying lengths. The support is equipped with a transmission wheel and a feeding drive. The transmission wheel serves both to assist in supporting the steel bars and to transport them to the grinding position after welding and continue output.

[0009] Furthermore, a cleaning assembly is installed on the base. This assembly includes an air cylinder, a piston rod, an air pipe, and an air nozzle facing the welded end of the rebar. The piston rod is located on the moving path of the push plate. When the push plate feeds axially, it pushes the piston rod to compress the gas in the air cylinder, causing the airflow to pass through the air pipe and nozzle and be sprayed towards the welded end of the rebar. The air nozzle is linked to the feeding action via a circular rod, a sliding rod, a second spring, and a plate, allowing the air nozzle to move with the welded end of the rebar during feeding and maintain an effective blowing distance.

[0010] Furthermore, the welding machine body is equipped with a grinding block and a circular rotary mechanism. The welding torch moves around the rebar joint circumferentially along the circular rotary mechanism to form a continuous weld. After welding is completed, the transmission wheel transports the weld to the grinding position, the radial feed drive makes the grinding block close to the weld, and the circular rotary mechanism drives the grinding block to move around the joint circumferentially to complete the surface shaping of the weld.

[0011] The present invention also provides a laser welding forming process for rebar joints, including rebar support length adjustment and clamping, feeding component station switching, feeding rebars from both sides to each other and end face docking, welding end linkage blowing, circumferential laser welding with welding gun, post-weld conveying and circumferential grinding, and switching to the next feeding component; while performing welding and grinding at the current station, feeding and clamping of other feeding components are performed simultaneously.

[0012] Compared with the prior art, the present invention has the following advantages: This invention adopts a multi-station alternating structure, which can simultaneously complete the workpiece clamping and material preparation processes of other stations while the equipment is welding. The processes are parallel and do not interfere with each other, and the stations can be quickly rotated, so that the laser welding equipment is always in an effective working state, reducing the equipment's idle standby losses, significantly improving the overall production capacity and processing efficiency of the production line, and adapting to large-scale standardized production.

[0013] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0014] In the attached diagram: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of a partial three-dimensional structure; Figure 3 This is a three-dimensional structural diagram of the toothed rod of the present invention; Figure 4 This is another perspective view of the base of the present invention; Figure 5 This is a three-dimensional structural diagram of the arc-shaped seat of the present invention; Figure 6 This is a three-dimensional structural schematic diagram of the support of the present invention; Figure 7 This is a three-dimensional structural diagram of the framework of the present invention; Figure 8 This is a three-dimensional structural diagram of the clamping plate of the present invention.

[0015] In the diagram: 1. Welding machine body; 2. Welding torch; 3. Grinding block; 4. Base; 5. Feeding assembly; 51. Toothed rod; 52. Screw; 53. Push plate; 54. Frame; 55. Gear; 56. Slide seat; 57. Support rod; 58. Steel ball; 59. First spring; 510. Multi-section telescopic rod; 511. Arc-shaped seat; 512. Round shaft; 513. Auxiliary rod; 514. Electric telescopic rod; 515. Top rod; 516. Clamping plate; 517. Triangular seat; 518. Anti-slip pad; 519. Multi-hole rod; 520. Support; 521. Transmission wheel; 6. Cleaning assembly; 61. Round hole rod; 62. Slide rod; 63. Second spring; 64. Air nozzle; 65. Plate; 66. Air cylinder; 67. Piston rod; 68. Air pipe. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0017] like Figure 1As shown, the laser welding forming fixture for rebar joints in this embodiment includes a welding machine body 1 and two bases 4 symmetrically arranged on both sides of the welding machine body 1. The welding machine body 1 forms a welding area for the butt joint of two rebars. The welding torch 2 is mounted on the annular rotary mechanism of the welding machine body 1, with the light emission direction of the welding torch 2 facing the rebar joint. The annular rotary mechanism can drive the welding torch 2 to rotate around the axis of the rebar joint. A grinding block 3 is also provided on the welding machine body 1. The grinding block 3 can move between a clearance position and a grinding position under the action of the radial feed drive, and can move circumferentially around the rebar joint.

[0018] like Figure 1 and Figure 2 As shown, each base 4 is equipped with three parallel feeding components 5, and the reinforcing bar support direction of the three feeding components 5 all points towards the welding machine body 1. A toothed rod 51 is arranged transversely on the base 4 along the axis intersecting the reinforcing bar, and a gear 55 is installed on the frame 54 of each feeding component 5, meshing with the toothed rod 51. The station switching drive is preferably a motor with braking or self-locking function, and its output end is connected to the gear 55. By controlling the forward or reverse rotation of the gear 55, the frame 54 can move along the toothed rod 51, thereby aligning the centerline of any feeding component 5 with the welding axis of the welding machine body 1. The feeding component 5 located on the welding axis is defined as being in the welding position, and the remaining feeding components 5 are in the material preparation position. The number of feeding components 5 is not limited to three; it can also be set to two or more depending on the production cycle and the size of the base 4.

[0019] like Figures 5 to 7 As shown, a slide block 56 is provided on the frame 54 along the axial direction of the reinforcing bar, and the slide block 56 is slidably connected to the frame 54. An arc-shaped seat 511 is fixed to one end of the slide block 56 near the welding machine body 1, and its upper surface forms an arc-shaped support groove adapted to the outer periphery of the reinforcing bar. An auxiliary rod 513 is provided between the frame 54 and the slide block 56, and the auxiliary rod 513 provides linear guidance for the slide block 56. A multi-section telescopic rod 510 is also connected between the frame 54 and the slide block 56, and a first spring 59 is sleeved on the outside of the multi-section telescopic rod 510; when the external feeding action is released, the first spring 59 pushes the slide block 56 to return to its original position away from the welding machine body 1, and the multi-section telescopic rod 510 is used to limit the bending of the first spring 59 and improve the stability of the return.

[0020] A perforated rod 519 is provided at the outer end of the slide block 56. The perforated rod 519 can extend and retract relative to the slide block 56 along the axial direction of the reinforcing bar. Multiple positioning holes are provided at intervals along the length direction of the perforated rod 519. A support 520 is fixed to the outer end of the perforated rod 519, and an auxiliary support groove is formed on the support 520. By inserting locking bolts into different positioning holes, the distance between the support 520 and the arc-shaped seat 511 can be changed to accommodate the stable support of reinforcing bars of different lengths. A transmission wheel 521 is rotatably mounted on the support 520. The wheel surface of the transmission wheel 521 contacts the outer circumference of the reinforcing bar. The feeding drive can drive the transmission wheel 521 to rotate, thereby causing the reinforcing bar to move axially after welding.

[0021] like Figure 5 , Figure 6 and Figure 8 As shown, the two sides of the arc-shaped seat 511 are rotatably connected to clamping plates 516 via round shafts 512. The two clamping plates 516 can rotate towards each other and press the reinforcing bars from above. A triangular seat 517 is provided on the outer side of each clamping plate 516. The triangular seat 517 has a guide surface that is inclined relative to the moving direction of the top rod 515. An electric telescopic rod 514 is installed on the arc-shaped seat 511, and its telescopic end is connected to the top rod 515. When the electric telescopic rod 514 extends, the top rod 515 slides along the guide surface of the triangular seat 517 and applies a thrust to the triangular seat 517, causing the two clamping plates 516 to rotate around the corresponding round shafts 512 toward the arc-shaped seat 511. The anti-slip pads 518 on the inner side of the clamping plates 516 contact the reinforcing bars, realizing the pressing and limiting of the reinforcing bars. When the electric telescopic rod 514 retracts, the top rod 515 retracts, and the clamping plates 516 release the reinforcing bars. Anti-slip pads 518 can be made of heat-resistant rubber, copper alloy toothed pads, or other pads that combine friction and heat resistance.

[0022] like Figures 2 to 4 As shown, the axial feeding drive mechanism includes a screw 52, ​​a feeding motor, and a pusher plate 53. The screw 52 is rotatably mounted on the base 4 along the axial direction of the reinforcing bar. The pusher plate 53 is threadedly engaged with the screw 52 and its rotation is restricted by a slide or guide on the base 4. The slide 56 located at the welding station engages with the pusher plate 53 via a support rod 57, and the steel ball 58 at the end of the support rod 57 rolls in contact with the pusher plate 53. When the feeding motor drives the screw 52 to rotate, the pusher plate 53 moves along the base 4 and pushes the support rod 57, thereby moving the slide 56, along with the arc-shaped seat 511 and the clamped reinforcing bar, toward the welding machine body 1. The axial feeding drive mechanisms on both sides of the welding machine body 1 operate synchronously, bringing the ends of the two reinforcing bars closer together. The steel ball 58 reduces the friction between the pusher plate 53 and the support rod 57 and allows the feeding assembly 5 to smoothly disengage from or enter the working position of the pusher plate 53 during lateral switching.

[0023] The welding machine body 1 can be equipped with a through-beam photoelectric sensor, a laser displacement sensor, or a contact position sensor to detect the position or end-face gap of the two steel bars. The controller stops the feeding motors on both sides based on the sensor signals, positioning the ends of the two steel bars at a preset butt joint position. For processes requiring a small welding gap, the desired gap can be obtained by controlling the rotation of the feeding motors or a preset displacement.

[0024] like Figure 3 and Figure 4 As shown, a cleaning component 6 is installed on the base 4. An air cylinder 66 is fixed to the lower or side of the base 4. One end of a piston rod 67 is fitted with a piston and slidably inserted into the air cylinder 66, while the other end is located on the moving path of the push plate 53. When the push plate 53 moves towards the welding machine body 1, it pushes the piston rod 67, which forces the gas in the air cylinder 66 into the air pipe 68, and the gas is ejected through the air nozzle 64. A round-hole rod 61 is fixed to the base 4, and a sliding rod 62 slides through it. A second spring 63 is sleeved on the sliding rod 62, and the air nozzle 64 is connected to the end of the sliding rod 62 near the welding station. A plate 65 is connected to the sliding rod 62 and located on the action path of the slide block 56 or its connecting parts. When the slide block 56 moves axially, the plate 65 drives the air nozzle 64 to move synchronously. The second spring 63 is used for buffering and resetting, ensuring that the air nozzle 64 continues to face the welding end of the reinforcing bar without interfering with the clamping mechanism. Therefore, the axial feeding action simultaneously completes the purging of the welded end, eliminating the need for a separate cleaning cycle.

[0025] The working process of this embodiment is as follows. First, according to the length of the reinforcing bar, the perforated rod 519 is pulled out from the slide 56 to a suitable position, and a locking bolt is inserted into the corresponding positioning hole so that the support 520 and the arc-shaped seat 511 jointly support the reinforcing bar. Then, the reinforcing bar to be welded is placed on the arc-shaped seat 511 and the support 520, so that its welding end extends out of the arc-shaped seat 511 on the side closer to the welding machine body 1; the electric telescopic rod 514 is activated, and the top rod 515 pushes the triangular seat 517, so that the clamping plates 516 on both sides rotate inward, and the anti-slip pads 518 press the reinforcing bar. The corresponding feeding assembly 5 on the other side of the welding machine body 1 clamps another reinforcing bar in the same steps, and the subsequent reinforcing bars to be welded can be pre-clamped at other material preparation stations.

[0026] After clamping is completed, the station switching drive is activated, causing the feeding assemblies 5 on both sides, carrying the reinforcing bars to be welded, to move along the rack 51 to the welding station. The feeding motors on both sides synchronously drive the screw 52 to rotate, the push plate 53 pushes the support rod 57 and slide 56 forward, and the arc-shaped seat 511 moves the two reinforcing bars towards each other. During this process, the push plate 53 synchronously compresses the air cylinder 66, and the air nozzle 64 moves with the slide 56 and blows air towards the ends of the reinforcing bars to remove dust and loose impurities. When the sensors detect that both ends have reached the preset positions, the controller stops the feeding motors.

[0027] Subsequently, the annular rotary mechanism drives the welding torch 2 to rotate once around the axis of the rebar joint or continuously rotate at a set angle. The laser beam melts and welds the butt joint of the rebar ends, forming a continuous circumferential weld. After welding, the welding torch 2 stops emitting light and retreats to a safe position. The feeding drive drives the transmission wheel 521 to rotate, causing the welded rebar to move axially until the weld aligns with the grinding block 3. The radial feed drive drives the grinding block 3 to approach the weld. The grinding block 3 rotates and moves circumferentially around the weld under the drive of the annular rotary mechanism to remove protrusions on the outer periphery of the weld and improve the joint shape. After grinding is completed, the transmission wheel 521 continues to rotate, outputting the finished rebar.

[0028] While the current pair of feeding components 5 is performing axial feeding, laser welding, grinding, and unloading, the operator or automatic feeding mechanism can simultaneously complete the length adjustment, placement, and clamping of the next set of reinforcing bars on the other feeding components 5. After the current processing is completed, the push plate 53 retracts, the first spring 59 drives the slide 56 to reset, and the station switching drive drives the current feeding component 5 to leave the welding station, and switches the adjacent feeding component 5 that has completed material preparation to the welding station, thereby forming a continuous multi-station alternating processing cycle.

[0029] In this embodiment, the feeding motor, station switching drive, electric telescopic rod 514, unloading drive, radial feed drive, ring rotary mechanism, sensor, and controller can all adopt commonly used structures in the art. The controller can sequentially control each actuator according to a preset program and set interlocking conditions to ensure that only the feeding assembly 5 located at the welding station performs axial feeding, and that the clamping mechanism remains locked when the welding torch 2 is working.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions, simple modifications, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A laser welding forming fixture for rebar joints, comprising a welding machine body (1) and bases (4) respectively disposed on both sides of the welding machine body (1), wherein a welding torch (2) capable of circumferentially moving around the axis of the rebar joint is disposed on the welding machine body (1), characterized in that: Each of the bases (4) is provided with a transversely extending rack (51), an axial feeding drive mechanism, and multiple feeding assemblies (5); the multiple feeding assemblies (5) are arranged parallel to each other, and each feeding assembly (5) includes a frame (54), a slide (56), an arc-shaped seat (511), and a clamping mechanism. The frame (54) is provided with a gear (55) that meshes with the rack (51) and a station switching drive for driving the gear (55) to rotate, so that any feeding assembly (5) moves along the rack (51) to the welding machine body (1). The welding station is corresponding to the welding axis; the slide (56) is slidably disposed on the frame (54) along the axial direction of the reinforcing bar, the arc-shaped seat (511) is disposed on the slide (56) and used to support the reinforcing bar, the clamping mechanism is disposed on the arc-shaped seat (511) and used to press and position the reinforcing bar; the axial feeding drive mechanism includes a push plate (53) that can move along the axial direction of the reinforcing bar, the push plate (53) is in transmission cooperation with the slide (56) located at the welding station to drive the reinforcing bars located on both sides of the welding machine body (1) to move towards each other and make the welding ends of the two reinforcing bars connect.

2. The laser welding forming fixture for rebar joints according to claim 1, characterized in that: The axial feeding drive mechanism also includes a screw (52) rotatably mounted on the base (4) and a feeding motor that drives the screw (52) to rotate. The screw (52) is threadedly engaged with the push plate (53). A support rod (57) is provided on the slide (56). The end of the support rod (57) is provided with a steel ball (58) that rolls in contact with the push plate (53). A multi-section telescopic rod (510) and a first spring (59) sleeved on the outside of the multi-section telescopic rod (510) are provided between the frame (54) and the slide (56) to drive the slide (56) to reset when the push plate (53) retracts.

3. The laser welding forming fixture for rebar joints according to claim 2, characterized in that: An auxiliary rod (513) parallel to the moving direction of the slide (56) is also provided between the frame (54) and the slide (56). The slide (56) and the auxiliary rod (513) slide together to limit the sway of the slide (56) during the axial feeding process.

4. The laser welding forming fixture for rebar joints according to claim 1, characterized in that: The clamping mechanism includes clamping plates (516) rotatably connected to both sides of the arc-shaped seat (511) via a round shaft (512), a triangular seat (517) disposed on the outside of the clamping plates (516), an electric telescopic rod (514) disposed on the arc-shaped seat (511), and a top rod (515) connected to the telescopic end of the electric telescopic rod (514); the top rod (515) slides with the guide surface of the triangular seat (517) to push the clamping plates (516) on both sides to rotate in opposite directions when the electric telescopic rod (514) extends; an anti-slip pad (518) is provided on the side of the clamping plate (516) facing the reinforcing bar.

5. The laser welding forming fixture for rebar joints according to claim 1, characterized in that: A perforated rod (519) is slidably arranged on the slide block (56) along the axial direction of the reinforcing bar. A support (520) is connected to the outer end of the perforated rod (519). A locking member is provided on the slide block (56) that can be selectively inserted into different positioning holes of the perforated rod (519). A transmission wheel (521) and a feeding drive member for driving the transmission wheel (521) to rotate are rotatably arranged on the support (520). The transmission wheel (521) is used to support and axially transport the welded reinforcing bar.

6. The laser welding forming fixture for rebar joints according to claim 1, characterized in that: The base (4) is also provided with a cleaning component (6), which includes an air cylinder (66), a piston rod (67), an air pipe (68), and an air nozzle (64) facing the welded end of the steel bar. The air cylinder (66) is fixed on the base (4). One end of the piston rod (67) is slidably disposed in the air cylinder (66), and the other end is located on the moving path of the push plate (53). The air outlet of the air cylinder (66) is connected to the air nozzle (64) through the air pipe (68) so that the push plate (53) pushes the piston rod (67) and causes the air nozzle (64) to discharge a clean airflow when the material is fed axially.

7. The laser welding forming fixture for rebar joints according to claim 6, characterized in that: The cleaning assembly (6) further includes a circular hole rod (61) disposed on the base (4), a slide rod (62) slidably passing through the circular hole rod (61), a second spring (63) sleeved on the slide rod (62), and a plate (65) connected to the slide rod (62). The air nozzle (64) is disposed on the slide rod (62). The plate (65) is in a transmission cooperation with the slide seat (56) at the welding position so that the air nozzle (64) moves with the slide seat (56) and remains facing the welding end of the steel bar.

8. The laser welding forming fixture for rebar joints according to claim 1, characterized in that: The welding machine body (1) is also provided with a grinding block (3) and a ring rotary mechanism. The welding gun (2) and the grinding block (3) are respectively engaged with the ring rotary mechanism. The grinding block (3) is connected to a radial feed drive so that the grinding block (3) approaches the weld after the laser welding of the steel bar joint is completed, and is driven by the ring rotary mechanism to move around the steel bar joint in a circumferential direction.

9. A laser welding forming process for rebar joints, characterized in that, The laser welding forming fixture for rebar joints as described in any one of claims 1-8 includes the following steps: S1. Adjust the position of the support (520) relative to the arc seat (511) according to the length of the steel bar to be welded, place the steel bar to be welded on the corresponding feeding components (5) on both sides of the welding machine body (1), and position the steel bar to be welded by the clamping mechanism. S2. Through the meshing transmission of gear (55) and rack (51), a pair of feeding components (5) loaded with steel bars to be welded are switched to the welding station; S3. Drive the push plates (53) on both sides to move, so that the slides (56) on both sides drive the steel bars to be welded to move towards each other until the welding ends of the two steel bars reach the preset docking position. S4. Drive the welding torch (2) to move circumferentially around the joint axis of the two steel bars to be welded, and perform laser welding on the butt joint of the two steel bars to be welded. S5. The welded steel bar is transported by the transmission wheel (521) so that the weld is moved to the grinding position and the grinding block (3) is driven to approach the weld and move around the weld to complete the grinding. S6. Output the steel bars that have been welded and ground, and switch the feeding assembly (5) of the adjacent pair of steel bars that have been clamped and are to be welded to the welding station.

10. The laser welding forming process for rebar joints according to claim 9, characterized in that: In step S3, the push plate (53) drives the slide (56) to feed material axially while pushing the piston rod (67) to compress the gas in the air cylinder (66). The gas is blown towards the welding end of the steel bar through the air pipe (68) and the air nozzle (64). Furthermore, during steps S4 and S5, feeding, length adjustment and clamping positioning operations are performed simultaneously on the feeding assembly (5) that is not in the welding position.

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