A welded pipe machine with automatic feeding and automatic belt connecting functions

Abstract

The present application relates to laser welding auxiliary equipment technical field, especially to a kind of welding pipe machine with automatic feeding, automatic banding function, including workbench, steel band straightening pre-bending forming unit, pipe blank joint welding unit, steel band coil material unwinding unit, controller, moving roller, horizontal guide rail, sliding block, air cylinder, banding backing plate, banding press plate, welding assembly, laser transmitter, laser receiver, moving guide assembly and conveying assembly, workbench is the load-bearing platform of steel band banding operation, steel band straightening pre-bending forming unit is connected and assembled in the left side position of workbench, pipe blank joint welding unit is set on steel band straightening pre-bending forming unit. Through the cooperation of laser transmitter, datum hole and laser receiver, the end position of old steel band is automatically detected, the controller is triggered to control conveying assembly pause, banding press plate clamping, welding machine automatic welding and reset in turn, realize the automatic banding of new and old steel band without human intervention, significantly shorten the banding auxiliary time.

Description

Technical Field

[0001] This invention relates to the field of laser welding auxiliary equipment technology, and in particular to a pipe welding machine with automatic feeding and automatic splicing functions. Background Technology

[0002] Currently, in continuous welded pipe production, after the steel strip on the unwinding unit is used up, new steel strip needs to be loaded and butt-welded to the end of the old steel strip to achieve continuous material supply for the production line. Traditionally, this involves manually observing the remaining old steel strip and judging the timing of shutdown based on experience. After the equipment has completely stopped, the operator manually pulls the new steel strip to the worktable to butt-weld the old steel strip, and then uses external welding equipment to complete the splicing operation.

[0003] This method has the following drawbacks: First, manual detection of when the steel strip is exhausted is delayed and inaccurate, which can easily cause the unwinding unit to idle or the steel strip to be not reconnected in time, thus interrupting production. Moreover, the manual operation is cumbersome and the strip splicing efficiency is low. Second, during the strip splicing process, the welding operation and the steel strip conveying are difficult to coordinate and synchronize. Welding usually requires pausing the normal conveying of the steel strip and restarting the equipment after welding is completed, resulting in discontinuous production and affecting the working rhythm of the entire production line. Third, in some existing automatic strip splicing devices, the welding actuator needs to be equipped with an independent drive source and control logic to realize the welding trajectory movement. In addition, there is a lack of mechanical linkage between the welding machine feed speed and the steel strip conveying speed, which can easily cause quality problems such as weld seam misalignment and weak overlap due to speed mismatch. Summary of the Invention

[0004] In order to overcome the shortcomings of existing steel strip splicing processes, such as reliance on manual judgment of when to stop the machine, the need to interrupt production for splicing operations leading to low efficiency, and the lack of mechanical linkage between welding feed and steel strip conveying, which easily causes weld seam misalignment, this invention provides a welded pipe machine with automatic feeding and automatic splicing functions.

[0005] The technical implementation scheme of the present invention is as follows: a welded pipe machine with automatic feeding and automatic strip splicing functions, comprising a worktable, a steel strip leveling and pre-bending forming unit, a pipe blank welding unit, a steel strip coil unwinding unit, a controller, moving rollers, a horizontal guide rail, a slider, a cylinder, a strip splicing support plate, a strip splicing pressure plate, a welding assembly, a laser emitter, a laser receiver, a moving guide assembly, and a conveying assembly. The worktable serves as the bearing platform for the steel strip splicing operation. The steel strip leveling and pre-bending forming unit is assembled on the left side of the worktable. The pipe blank welding unit is located on the steel strip leveling and pre-bending forming unit. The steel strip coil unwinding unit is located on the right side of the worktable. A controller is mounted on the front side wall of the worktable. Multiple moving rollers are rotatably mounted at intervals on the top surface of the worktable. The upper sides of the worktable are equipped with horizontal guide rails, and sliders are slidably connected to the horizontal guide rails. Cylinders are installed on the sliders. A strip receiving plate is connected between the inner walls of two cylinders. A strip receiving pressure plate is connected between the tops of the telescopic rods of two cylinders. A welding assembly is provided on the strip receiving pressure plate. A laser emitter is installed on the top of the strip receiving pressure plate. A reference hole is opened on the strip receiving plate. A laser receiver is installed at the bottom of the strip receiving plate. The laser emitter, the reference hole and the laser receiver are coaxial in their optical paths. The steel strip leveling and pre-bending forming unit, the billet welding unit, the steel strip coil unwinding unit, the cylinders, the laser emitter and the laser receiver are all electrically connected to the controller. A conveying assembly is provided on the worktable, and a moving guide assembly is provided on the top of the worktable.

[0006] Furthermore, it is particularly preferred that the welding assembly includes a slide rail and a welding machine, with the slide rail installed on the top right side of the connecting plate, the welding machine slidably mounted on the slide rail, an clearance groove provided on the connecting plate, the welding head of the welding machine aligned with the clearance groove, and the welding machine electrically connected to the controller.

[0007] Furthermore, it is particularly preferred that the moving guide assembly includes a guide frame, a photoelectric sensor, a baffle, a docking rod, and a reset guide assembly. The guide frame is installed in the middle of the top of the worktable, and an inclined groove is opened on the top surface of the guide frame. A docking rod is installed at the top of the welding machine, and the docking rod is inserted into the inclined groove to form a sliding fit. A photoelectric sensor is installed on the top left side of the guide frame, and a baffle is installed at the front end of the top of the slide rail. The baffle and the photoelectric sensor are positioned opposite each other. The photoelectric sensor is electrically connected to the controller. A reset guide assembly is provided inside the worktable.

[0008] Furthermore, it is particularly preferred that the reset guide assembly includes a guide rod, a reset spring, a movable wheel frame, a limit rod, a guide wheel frame, and a bidirectional threaded rod. The guide rod is symmetrically connected to the upper side of the inside of the worktable. The guide rod passes through both ends of the receiving tray plate. The movable wheel frame is slidably connected to each guide rod. The movable wheel frame is fixedly connected to the left side wall of the receiving tray plate. The outer side of each guide rod is fitted with a reset spring. The two ends of the reset spring are respectively connected to the movable wheel frame and the worktable. The limit rod is symmetrically connected between the two movable wheel frames. The front end and the rear end of the two limit rods are slidably connected to the guide wheel frame. The middle of the two movable wheel frames is rotatably connected to the bidirectional threaded rod. The two threads of the bidirectional threaded rod have opposite directions of rotation. The two guide wheel frames are respectively connected to the two threads of the bidirectional threaded rod.

[0009] Furthermore, it is particularly preferred that the conveying assembly includes a frame, a lifting frame, conveying rollers, a drive motor, and an electric push rod. The frame is connected to the top of the worktable, and the lifting frames are slidably connected to both sides of the frame. Conveying rollers are rotatably connected between the left and right sides of the two lifting frames. Electric push rods are installed on both sides of the middle of the frame. The telescopic rods of the electric push rods are respectively connected to the lifting frames on the corresponding sides. The drive motors are installed on both sides of the front lifting frame. The output shafts of the drive motors are respectively fixedly connected to the front end of the conveying rollers on the corresponding sides. The drive motors and electric push rods are electrically connected to the controller.

[0010] Furthermore, it is particularly preferred that the steel strip unwinding unit consists of a tensioning drum and a guide pressure roller; the steel strip leveling and pre-bending forming unit consists of a multi-stage forming roll group and a side force bending roll group; and the billet seam welding unit consists of a welding host, an extrusion welding wheel, and a weld seam shaping and sizing roller.

[0011] In addition, it is particularly preferred that the pipe welding machine also includes gaskets and buffer pads, with gaskets mounted on the top surface of the connecting plate and buffer pads connected to both sides of the bottom of the connecting pressure plate.

[0012] Furthermore, preferably, the pipe welding machine also includes a rectangular pipe frame, a central wheel frame, tension springs, contact wheels, a support frame, and wedges. The rectangular pipe frame is slidably connected between the right ends of the two guide rods. The left side wall of the rectangular pipe frame is fixedly connected to the right side wall of the connecting plate. The central wheel frame is slidably connected to both sides of the rectangular pipe frame. Tension springs are connected between the central wheel frame and the rectangular pipe frame on both sides. The support frame is connected to the right side wall of the connecting plate. Wedges are connected to both sides of the support frame. Contact wheels are rotatably connected to the top of the central wheel frame. The inclined working surface of the wedges and the wheel surface of the contact wheels form a rolling contact engagement.

[0013] The present invention has the following advantages: 1. By cooperating with the laser emitter, the reference hole and the laser receiver, the position of the end of the old steel strip is automatically detected, and the controller is triggered to control the conveying component to pause, the strip clamping plate to clamp, the welding machine to automatically weld and reset in sequence, so as to realize the automatic strip connection of the new and old steel strips without human intervention, and significantly shorten the strip connection auxiliary time.

[0014] 2. By utilizing the sliding fit between the connecting rod and the inclined slide, the linear displacement is converted into a uniform feed motion of the welding machine along the slide rail as the connecting plate and the connecting pressure plate move to the left with the steel strip. This enables the laser welding and steel strip conveying to be carried out simultaneously, resulting in uniform and continuous welds and a reliable connection.

[0015] 3. When the pressure plate is pressed down, the inclined block moves down simultaneously. Through the rolling cooperation between the inclined surface of the inclined block and the contact wheel, the two central wheel frames on both sides are pushed to retract inward along the rectangular tube frame, which implements the centering limit in the width direction of the steel strip, eliminates the lateral deviation caused by manual traction, and ensures that the new and old steel strips are accurately aligned. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the worktable, controller, and moving roller of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the guide frame, frame, and conveyor rollers of the present invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the moving roller, horizontal guide rail, and slider components of the present invention.

[0020] Figure 5 This is a three-dimensional structural diagram of the components of the present invention, including the pressure plate, gasket, and laser receiver.

[0021] Figure 6 This is a three-dimensional structural diagram of the reference hole, gasket, and buffer pad components of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the guide frame, inclined slide, and photoelectric sensor components of the present invention.

[0023] Figure 8 This is a three-dimensional structural diagram of the connecting rod, guide rod, and return spring components of the present invention.

[0024] Figure 9 This is a three-dimensional structural diagram of the rectangular tube frame, the central wheel frame, and the tension spring of the present invention.

[0025] Figure 10 This is a three-dimensional structural diagram of the movable wheel frame, limiting rod, and guide wheel frame of the present invention.

[0026] Figure 11 This is a schematic diagram of the planar structure of the components of the present invention, including the central wheel frame, the inclined block, and the contact wheel.

[0027] Figure 12This is a three-dimensional structural diagram of the frame, lifting frame, and conveying rollers of the present invention.

[0028] The diagram is labeled as follows: 1-Workbench, 101-Steel strip leveling and pre-bending forming unit, 102-Blank seam welding unit, 103-Steel strip coil unwinding unit, 104-Controller, 105-Moving roller, 106-Horizontal guide rail, 107-Slider, 108-Cylinder, 109-Strip receiving plate, 1010-Strip receiving pressure plate, 1011-Slide rail, 1012-Welding machine, 1013-Laser emitter, 1014-Reference hole, 1015-Shim, 1016-Buffer pad, 1017-Laser receiver, 201- Guide frame, 202- Inclined slide, 203- Photoelectric sensor, 204- Baffle, 205- Docking rod, 301- Guide rod, 302- Reset spring, 303- Moving wheel frame, 304- Limiting rod, 305- Guide wheel frame, 306- Bidirectional threaded rod, 401- Frame, 402- Lifting frame, 403- Conveying roller, 404- Drive motor, 405- Electric push rod, 601- Rectangular tube frame, 602- Centering wheel frame, 603- Tension spring, 604- Contact wheel, 605- Support frame, 606- Inclined block. Detailed Implementation

[0029] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0030] Example: A welded pipe machine with automatic feeding and automatic splicing functions, such as... Figures 1-12As shown, the system includes a workbench 1, a steel strip leveling and pre-bending forming unit 101, a billet joining and welding unit 102, a steel strip coil unwinding unit 103, a controller 104, a moving roller 105, a horizontal guide rail 106, a slider 107, a cylinder 108, a strip joining support plate 109, a strip joining pressure plate 1010, welding components, a laser emitter 1013, a laser receiver 1017, a moving guide assembly, and a conveying assembly. The workbench 1 serves as the carrying platform for the steel strip joining operation. The steel strip leveling and pre-bending forming unit 101 is assembled on the left side of the workbench 1, forming a continuous operation connection structure. The billet joining and welding unit 102 is integrated onto the steel strip leveling and pre-bending forming unit 101 and is used to join the strip strips. After flattening and bending, the open tubular blank undergoes seam welding closure. The steel strip unwinding unit 103 is arranged on the right side of the workbench 1, with a pre-reserved working distance between it and the workbench 1. A controller 104 is fixedly mounted on the front side wall of the workbench 1. Multiple moving rollers 105 are rotatably mounted on the top surface of the workbench 1 along the steel strip conveying direction. The moving rollers 105 are used to provide rolling support and auxiliary feeding for the steel strip output from the steel strip unwinding unit 103. Horizontal guide rails 106 are bolted to the front and rear sides of the upper side inside the workbench 1. Sliding blocks 107 are slidably connected to the horizontal guide rails 106. Cylinders 108 are mounted on the sliding blocks 107. A strip receiving plate is connected between the inner walls of two cylinders 108. 109. A strip-receiving pressure plate 1010 is fixedly connected between the top ends of the telescopic rods of the two cylinders 108. The strip-receiving pressure plate 1010 is vertically aligned with the strip-receiving support plate 109 and can be vertically opened and closed under the drive of the cylinders 108 to complete the clamping and loosening of the steel strip. The strip-receiving pressure plate 1010 is equipped with welding components. A laser emitter 1013 is installed through the middle of the top right side of the strip-receiving pressure plate 1010. A reference hole 1014 is opened on the strip-receiving support plate 109 at a position aligned with the laser emitter 1013. A laser receiver 1017 is installed at the bottom of the strip-receiving support plate 109 at a position aligned with the reference hole 1014. The laser emitter 1013, the reference hole 1014, and the laser receiver 1017 are connected. The three components are coaxial in their optical paths. The detection laser emitted by the laser emitter 1013 can penetrate the reference hole 1014 and be accurately received by the laser receiver 1017, thereby realizing the automatic detection of steel strip depletion. The steel strip leveling and pre-bending forming unit 101, the billet welding unit 102, the steel strip coil unwinding unit 103, the cylinder 108, the laser emitter 1013, and the laser receiver 1017 are all electrically connected to the controller 104. The controller 104 realizes the automated logic control of the whole machine. The workbench 1 is equipped with a conveying component for automatic continuous conveying of steel strip. The top of the workbench 1 is equipped with a moving guide component for accurately controlling the displacement trajectory of the welding component to complete the automated splicing and welding operation of new and old steel strips.

[0031] The steel strip unwinding unit 103 consists of a tensioning drum and guide pressure rollers. The tensioning drum secures the steel strip coil and releases it at a uniform speed. The guide pressure rollers correct the strip position, ensuring smooth unwinding of the raw material. The steel strip leveling and pre-bending forming unit 101 consists of a multi-stage forming roll group and a side-force bending roll group. It first performs overall flattening and leveling of the input flat steel strip to eliminate warping and deformation defects. Then, through a multi-pass progressive bending process, the flat steel strip is gradually bent into a U-shaped structure, ultimately forming an open tubular blank, thus achieving the desired tube blank shape. The standardized pre-forming process; the tube blank joining and welding unit 102 consists of a welding host, an extrusion welding wheel and a weld seam shaping and sizing roller. After the steel strip is processed into an open tubular tube blank by the steel strip leveling and pre-bending forming unit 101, it is continuously transported to the working area of ​​the tube blank joining and welding unit 102. The welding host provides a welding heat source, and the extrusion welding wheel extrudes and adheres the two sides of the tube blank weld seam. Then, the weld seam shaping and tube body sizing calibration are completed by the weld seam shaping and sizing roller. Finally, the open tubular tube blank is welded into a seamless closed metal tube body, completing the basic forming process of the pipe fitting.

[0032] like Figure 4 and Figure 6 As shown, the welding assembly includes a slide rail 1011 and a welding machine 1012. The slide rail 1011 is bolted to the top right side of the connecting pressure plate 1010. The welding machine 1012 is slidably mounted on the slide rail 1011 along the front-back direction. An avoidance groove is provided through the surface of the connecting pressure plate 1010 along the front-back direction. The welding head of the welding machine 1012 is precisely aligned with the avoidance groove. The avoidance groove provides a penetration channel for the laser welding beam of the welding machine 1012, avoiding the obstruction and interference of the equipment structure on the welding light path. The assembly position of the laser emitter 1013 corresponds to the right side of the welding head of the welding machine 1012, forming a pre-detection and post-welding operation layout. The welding machine 1012 is electrically connected to the controller 104, which precisely starts and stops the welding operation.

[0033] like Figure 2 , Figure 3 and Figures 7-11As shown, the moving guide assembly includes a guide frame 201, a photoelectric sensor 203, a baffle 204, a docking rod 205, and a reset guide assembly. The guide frame 201 is bolted to the center of the top of the worktable 1. The top surface of the guide frame 201 has a vertically extending inclined groove 202. In the initial state of the equipment, the welding machine 1012 is at the rear limit position of the slide rail 1011. This initial position precisely corresponds to the right starting point of the inclined groove 202, and the left ending point of the inclined groove 202 corresponds to the left front end position of the guide frame 201. The front-to-back distance between the starting and ending points of the inclined groove 202 matches the maximum front-to-back displacement stroke of the welding machine 1012 on the slide rail 1011. Furthermore, both ends of the inclined groove 202 are provided with smooth transition sections to ensure the smoothness of displacement switching. A connecting rod 205 is installed at the top of the welding machine 1012. The connecting rod 205 is inserted into the inclined slide groove 202 and forms a sliding fit. A photoelectric sensor 203 is installed at the top of the guide frame 201 near the end transition section of the inclined slide groove 202. The sensing head of the photoelectric sensor 203 is set downward. A baffle 204 is fixedly installed at the front end of the top of the slide rail 1011. The baffle 204 and the photoelectric sensor 203 are set opposite each other. When the baffle 204 moves with the slide rail 1011 to directly below the photoelectric sensor 203, it can block the sensing light path of the photoelectric sensor 203. The photoelectric sensor 203 is electrically connected to the controller 104 to realize automatic signal feedback when the welding stroke is in place. A reset guide assembly for equipment reset is integrated inside the worktable 1.

[0034] like Figures 8-11As shown, the reset guide assembly includes a guide rod 301, a reset spring 302, a movable wheel frame 303, a limit rod 304, a guide wheel frame 305, and a bidirectional threaded rod 306. Guide rods 301 are symmetrically welded to the upper side of the worktable 1, passing through the front and rear ends of the receiving tray 109 to form a sliding connection. The receiving tray 109 can slide left and right along the axis of the guide rod 301, achieving overall follow-up movement of the receiving structure. Movable wheel frames 303 are slidably connected to each guide rod 301, and each movable wheel frame 303 is fixedly connected to the left side wall of the receiving tray 109, achieving synchronous movement. Reset springs 302 are sleeved on the outer side of each guide rod 301. The right end of each reset spring 302 is fixedly connected to the left side wall of the corresponding movable wheel frame 303, and the left end of each reset spring 302 is fixedly connected to the left side wall of the worktable 1. The steel belt is fixedly connected to the wall. Two movable wheel frames 303 are symmetrically connected with limiting rods 304. Guide wheel frames 305 are slidably connected between the front and rear ends of the two limiting rods 304. The two opposing guide wheel frames 305 abut against the front and rear ends of the steel belt, achieving centering, limiting, and guiding correction during the steel belt conveying process. A bidirectional threaded rod 306 is rotatably connected through the middle of the two movable wheel frames 303. The front and rear threads of the bidirectional threaded rod 306 have opposite directions. The two guide wheel frames 305 are respectively threaded to the front and rear ends of the bidirectional threaded rod 306. A hexagonal nut is fixed to one end of the bidirectional threaded rod 306. By placing a wrench on the outside of the hexagonal nut and rotating the bidirectional threaded rod 306, the spacing of the guide wheel frames 305 can be adjusted to accommodate steel belts of different widths.

[0035] like Figure 3 and Figure 12 As shown, the conveying assembly includes a frame 401, a lifting frame 402, conveying rollers 403, a drive motor 404, and an electric push rod 405. The frame 401 is bolted to the top of the worktable 1, located outside the guide frame 201. The lifting frames 402 are vertically slidably connected to the front and rear sides of the frame 401. Conveying rollers 403 are rotatably connected between the left and right sides of the two lifting frames 402. The two conveying rollers 403 correspond to the left and right positions of the guide frame 201, respectively realizing the feeding and discharging of the steel strip. Two movable rollers 105 on the top of the worktable 1 are positioned directly below the two conveying rollers 403. The frame 401 is equipped with a clamping and conveying structure that corresponds to the conveying roller 403, and works together to smoothly convey the steel belt. Electric push rods 405 are vertically installed on the front and rear sides of the middle section of the frame 401 by bolts. The telescopic rods of the electric push rods 405 are fixedly connected to the lifting frame 402 on the corresponding side, and are used to control the lifting of the lifting frame 402. Drive motors 404 are installed on the left and right sides of the front lifting frame 402 by bolts. The output shafts of the drive motors 404 are fixedly connected to the front end of the conveying roller 403 on the corresponding side, and provide power for the rotation and feeding of the conveying roller 403. The drive motors 404 and the electric push rods 405 are electrically connected to the controller 104.

[0036] like Figures 5-6 As shown, the pipe welding machine also includes a gasket 1015 and a buffer pad 1016. The gasket 1015 is embedded and fixedly mounted on the top surface of the strip splicing support plate 109. During the strip splicing welding operation, the gasket 1015 precisely corresponds to the weld position of the steel strip and can effectively withstand the high temperature impact of the welding laser beam, avoiding the strip splicing support plate 109 body from being burned or deformed by high temperature. The bottom left and right sides of the strip splicing pressure plate 1010 are fixedly connected with buffer pads 1016 in the front and back direction. The buffer pads 1016 can increase the contact friction between the strip splicing pressure plate 1010 and the surface of the steel strip, ensuring the stability of the steel strip clamping and positioning. At the same time, it can buffer the impact stress when the pressure plate presses down to contact the steel strip, avoiding indentations and deformation on the surface of the steel strip and ensuring the processing accuracy of the steel strip.

[0037] During equipment operation, the steel strip coil fixing clip is first installed on the tensioning drum surface of the steel strip coil unwinding unit 103, and the first end of the steel strip is pulled to the working area of ​​the workbench 1. The guide pressure roller completes the correction and limitation of the steel strip conveying position. The steel strip is conveyed against the surface of the moving roller 105 on the top surface of the workbench 1. The moving roller 105 rotates passively with the friction of the steel strip conveying, assisting the steel strip to be conveyed smoothly to the left. Then, according to the thickness specification of the steel strip to be processed, the electric push rod 405 is started by the controller 104. The extension and retraction of the electric push rod 405 drives the lifting frame 402 to rise and fall vertically along the frame 401. The conveyor roller 403 is driven to rise and fall synchronously to adjust the working height, so that the conveyor roller 403 and the lower moving roller 105 form a clamping distance that is suitable for the thickness of the steel strip. Then, according to the steel strip width specification, the wrench is placed on the outside of the hexagonal nut at the end of the double-threaded rod 306, and the double-threaded rod 306 is rotated by the wrench, thereby adjusting the spacing of the guide wheel frame 305. Utilizing the transmission characteristics of the reverse threads at the front and rear sections of the double-threaded rod 306, the front and rear guide wheel frames 305 are driven to slide relative to each other, adjusting the spacing of the guide wheel frame 305 to match the width of the steel strip, ensuring the stability of the steel strip conveyor's centering guidance.

[0038] After parameter debugging, the drive motor 404 is started by the controller 104. The drive motor 404 drives the two conveyor rollers 403 to rotate synchronously. The right conveyor roller 403 cooperates with the corresponding moving roller 105 to continuously push the steel strip to the left. The steel strip passes through the surface of the receiving plate 109. The front and rear guide wheel frames 305 limit and correct the steel strip to prevent it from deviating or running off course. The steel strip is continuously conveyed to the area of ​​the left conveyor roller 403. The left conveyor roller 403 and the corresponding moving roller 105 work together to feed the steel strip and push it smoothly into the steel strip leveling and pre-bending forming unit 101. After entering the steel strip leveling and pre-bending forming unit 101, the steel strip is first flattened and leveled by a multi-stage forming roller group, and then gradually bent by a side force bending roller group to gradually form the flat steel strip into an open tubular blank. The formed open tubular blank is continuously conveyed to the pipe The billet welding unit 102, through the coordinated operation of the welding host, extrusion welding wheel and weld seam shaping and sizing roller, completes the welding closure, shaping and sizing of the billet weld seam. The seamless metal pipe body formed is continuously output to the left and enters the subsequent processing steps to realize continuous welded pipe processing. During the continuous processing of a single roll of steel strip, the controller 104 continuously activates the photoelectric sensor 203, laser emitter 1013 and laser receiver 1017 to realize real-time monitoring of the steel strip balance. Under normal feeding conditions, the steel strip covers the surface of the receiving tray 109 and blocks the reference hole 1014. The laser emitted by the laser emitter 1013 cannot penetrate the reference hole 1014, and the laser receiver 1017 does not receive a signal. The equipment maintains normal processing operation. At the same time, there is no obstruction under the photoelectric sensor 203, so the photoelectric sensor 203 is not triggered and there is no position signal output.

[0039] When the old steel strip coil on the unwinding unit 103 is exhausted and the tail end of the steel strip leaves the area blocked by the reference hole 1014, the laser beam from the laser emitter 1013 can penetrate the reference hole 1014 and be received in real time by the laser receiver 1017. The laser receiver 1017 immediately sends a steel strip exhaustion detection signal to the controller 104. After receiving the signal, the controller 104 immediately and synchronously controls the drive motor 404, the steel strip leveling and pre-bending forming unit 101, and the billet welding unit 102 to stop running and lock the equipment processing status. The operator assembles and fixes the new steel strip coil on the unwinding unit 103, pulls the head end of the new steel strip to the workbench 1 area, and starts the right drive motor 404 separately through the controller 104. 4. Drive the right-side conveyor roller 403 to rotate, conveying the new steel strip to the left, so that the beginning of the new steel strip is precisely connected with the end of the old steel strip. After the connection is completed, turn off the right-side drive motor 404, so that the weld seam of the new and old steel strips is precisely aligned with the welding head of the welding machine 1012. Then, the controller 104 starts the cylinder 108, the telescopic rod of the cylinder 108 retracts, and drives the strip-connecting pressure plate 1010, the slide rail 1011, the welding machine 1012 and the connection rod 205 to move vertically downwards in sync. The buffer pad 1016 at the bottom of the strip-connecting pressure plate 1010 presses the surface of the steel strip. Through the upper and lower clamping cooperation of the strip-connecting pressure plate 1010 and the strip-connecting support plate 109, the precise clamping and positioning of the joint area of ​​the new and old steel strips is completed, avoiding the steel strip from shifting or misaligning during the welding process.

[0040] After the steel strip is positioned, the controller 104 restarts the two drive motors 404, the steel strip leveling and pre-bending forming unit 101, and the billet welding unit 102. The equipment resumes continuous conveying and processing. After the equipment resumes operation, the conveying roller 403 drives the clamped and positioned new and old steel strips to be conveyed to the left at a uniform speed. Simultaneously, the receiving plate 109, cylinder 108, and slider 107 slide to the left along the horizontal guide rail 106. The moving wheel frame 303 moves to the left along the guide rod 301 with the receiving plate 109, compressing the return spring 302 to produce elastic compression deformation. At the same time, the welding machine 10 The top connecting rod 205 of the 12th section slides along the inclined groove 202 of the guide frame 201 as the overall equipment moves. Guided by the trajectory of the inclined groove 202, the welding machine 1012 moves forward at a uniform speed along the slide rail 1011. The welding machine 1012 starts working, and the welding laser beam penetrates the clearance groove of the joint plate 1010 to complete the fully automatic continuous welding of the butt weld of the new and old steel strips from back to front, realizing the steel strip jointing operation. When the connecting rod 205 slides to the end transition section of the inclined groove 202, the welding machine 1012 completes the welding of the entire weld and automatically stops. At this time, the front end of the slide rail 1011... The baffle 204 moves precisely to directly below the photoelectric sensor 203, blocking the sensing light path of the photoelectric sensor 203. The photoelectric sensor 203 sends a stroke completion feedback signal to the controller 104. After receiving the signal, the controller 104 controls the cylinder 108 to extend and reset, driving the connecting plate 1010, slide rail 1011, welding machine 1012, and connecting rod 205 to move upward synchronously, releasing the clamping limit on the steel strip. At this time, the reset spring 302 releases its elastic potential energy, pushing the moving wheel frame 303 to slide to the right along the guide rod 301 to reset, simultaneously driving the connecting plate 109 and the slider. 107 moves to the right along the horizontal guide rail 106 to reset. During the reset process of each component, the connecting rod 205 slides in the opposite direction along the inclined slide groove 202, driving the welding machine 1012 to slide backward along the slide rail 1011 and automatically reset to the initial working position. At the same time, the baffle 204 disengages from the sensing area of ​​the photoelectric sensor 203, and the photoelectric sensor 203 returns to the initial monitoring state. The whole machine completes a fully automatic splicing operation of new and old steel strips. This device can complete the automatic butt welding of steel strips under the condition of continuous processing of welded pipe equipment, effectively shortening the downtime of changing coils and splicing strips, and improving the continuity and automation of welded pipe processing.

[0041] like Figure 8 , Figure 9 and Figure 11As shown, the pipe welding machine also includes a rectangular pipe frame 601, a centering wheel frame 602, a tension spring 603, a contact wheel 604, a support frame 605, and an inclined block 606. The rectangular pipe frame 601 is slidably connected between the right ends of the two guide rods 301. The left side wall of the rectangular pipe frame 601 is fixedly connected to the right side wall of the connecting plate 109. The centering wheel frame 602 is slidably connected to both the front and rear sides of the rectangular pipe frame 601 in the front-rear direction. Tension springs 603 are connected between the left and right sides of the centering wheel frame 602 and the rectangular pipe frame 601. A support plate 604 is fixedly connected to the right side wall of the connecting pressure plate 1010. The support frame 605 has inclined blocks 606 fixedly connected to both the front and rear sides. The top of the center wheel frame 602 is rotatably connected to a contact wheel 604. The inclined working surface of the inclined block 606 forms a rolling contact with the wheel surface of the corresponding contact wheel 604. When the inclined block 606 moves downward with the pressure plate 1010 and its inclined surface presses against the contact wheel 604, the contact wheel 604 and the center wheel frame 602 can be pushed to slide towards each other along the rectangular tube frame 601 by the pressure of the inclined surface. The automatic centering and limiting correction of the steel belt is achieved by the limiting clamping of the center wheel frames 602 on both sides.

[0042] After the initial connection of the old and new steel strips is completed, cylinder 108 is activated and its telescopic rod is retracted, causing the connecting plate 1010 to move downwards to press the old and new steel strips together. During this process, the support frame 605 and the inclined block 606 move downwards simultaneously. The inclined surface of the inclined block 606 first contacts the contact wheel 604, applying an inward thrust to the contact wheel 604, which in turn pushes the centering wheel frame 602 inwards along the rectangular tube frame 601. The centering wheel frames 602 on both sides simultaneously retract towards the center, centering and correcting the width of the new steel strip, eliminating lateral offset caused by manual traction, thus significantly improving the lateral alignment accuracy of the connection between the old and new steel strips. During this process, the tension spring 603 is stretched due to the inward movement of the centering wheel frame 602. When the connecting plate 109 and the connecting plate 1010 move as a whole with the steel strip to the left, the rectangular tube frame 601 moves synchronously to the left with the connecting plate 109, thus... The centering wheel 602 and contact wheel 604 move synchronously, maintaining their centering and limiting effect on the new steel strip during the welding process. After the old and new steel strips are welded together, the cylinder 108 controls its telescopic rod to extend, driving the strip-connecting pressure plate 1010 to move upward to release the steel strip. The support frame 605 and the inclined block 606 move upward and reset. The inclined surface of the inclined block 606 gradually disengages from the contact wheel 604, and the tension spring 603 releases its elastic potential energy, driving the centering wheel 602 to move outward along the rectangular tube frame 601 and reset, so that the centering wheel 602 on both sides no longer contacts the steel strip. Subsequently, driven by the reset spring 302, the strip-connecting pressure plate 1010 and the strip-connecting support plate 109 move to the right and reset. The rectangular tube frame 601, the centering wheel 602, the support frame 605, and the inclined block 606 move to the right and reset to their initial working positions, completing the entire centering correction and reset cycle.

[0043] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation so as to cover all variations and equivalent structures and functions.

Claims

1. A welded pipe machine with automatic feeding and automatic splicing functions, characterized in that: The system includes a workbench (1), a steel strip leveling and pre-bending forming unit (101), a billet welding unit (102), a steel strip coil unwinding unit (103), a controller (104), a moving roller (105), a horizontal guide rail (106), a slider (107), a cylinder (108), a strip splicing support plate (109), a strip splicing pressure plate (1010), welding components, a laser emitter (1013), a laser receiver (1017), a moving guide assembly, and a conveying assembly. The workbench (1) serves as the support for the steel strip splicing operation. The platform, the steel strip leveling and pre-bending forming unit (101) is assembled on the left side of the workbench (1), the billet welding unit (102) is set on the steel strip leveling and pre-bending forming unit (101), the steel strip coil unwinding unit (103) is arranged on the right side of the workbench (1), the front side wall of the workbench (1) is equipped with a controller (104), multiple moving rollers (105) are rotatably installed on the top surface of the workbench (1), and horizontal guide rails (106) are installed on both sides of the upper side inside the workbench (1). Each of the two cylinders (108) is slidably connected to a slider (107), and a cylinder (108) is mounted on each slider (107). A receiving plate (109) is connected between the inner sidewalls of the two cylinders (108). A receiving pressure plate (1010) is connected between the top ends of the telescopic rods of the two cylinders (108). A welding assembly is provided on the receiving pressure plate (1010). A laser emitter (1013) is mounted on the top of the receiving pressure plate (1010). A reference hole (1014) is opened on the receiving plate (109). A welding assembly is installed on the bottom of the receiving plate (109). The laser receiver (1017) is equipped with a laser transmitter (1013), a reference hole (1014) and a laser receiver (1017) with coaxial optical paths. The steel strip leveling and pre-bending forming unit (101), the tube blank welding unit (102), the steel strip coil unwinding unit (103), the cylinder (108), the laser transmitter (1013) and the laser receiver (1017) are all electrically connected to the controller (104). The worktable (1) is equipped with a conveying component and a moving guide component is provided on the top of the worktable (1).

2. The welded pipe machine with automatic feeding and automatic splicing functions as described in claim 1, characterized in that: The welding assembly includes a slide rail (1011) and a welding machine (1012). The slide rail (1011) is installed on the top right side of the connecting pressure plate (1010). The welding machine (1012) is slidably mounted on the slide rail (1011). A clearance groove is provided on the connecting pressure plate (1010). The welding head of the welding machine (1012) is aligned with the clearance groove. The welding machine (1012) is electrically connected to the controller (104).

3. The welded pipe machine with automatic feeding and automatic splicing functions as described in claim 2, characterized in that: The moving guide assembly includes a guide frame (201), a photoelectric sensor (203), a baffle (204), a docking rod (205), and a reset guide assembly. The guide frame (201) is installed in the middle of the top of the workbench (1). An inclined groove (202) is opened on the top surface of the guide frame (201). A docking rod (205) is installed at the top of the welding machine (1012). The docking rod (205) is inserted into the inclined groove (202) and forms a sliding fit relationship. A photoelectric sensor (203) is installed on the top left side of the guide frame (201). A baffle (204) is installed at the front end of the top of the slide rail (1011). The baffle (204) and the photoelectric sensor (203) are set opposite to each other. The photoelectric sensor (203) is electrically connected to the controller (104). A reset guide assembly is provided inside the workbench (1).

4. The welded pipe machine with automatic feeding and automatic splicing functions as described in claim 3, characterized in that: The reset guide assembly includes a guide rod (301), a reset spring (302), a movable wheel frame (303), a limit rod (304), a guide wheel frame (305), and a bidirectional threaded rod (306). The guide rods (301) are symmetrically connected to the upper side of the inside of the worktable (1). The guide rods (301) pass through both ends of the receiving tray plate (109). The movable wheel frames (303) are slidably connected to the guide rods (301). The movable wheel frames (303) are fixedly connected to the left side wall of the receiving tray plate (109). The reset springs are sleeved on the outer side of the guide rods (301). (302) The two ends of the return spring (302) are connected to the movable wheel frame (303) and the worktable (1) respectively. The two movable wheel frames (303) are symmetrically connected to the limit rod (304). The front end and the rear end of the two limit rods (304) are slidably connected to the guide wheel frame (305). The middle part of the two movable wheel frames (303) is rotatably connected to the bidirectional threaded rod (306). The two threads of the bidirectional threaded rod (306) have opposite directions. The two guide wheel frames (305) are respectively connected to the two threads of the bidirectional threaded rod (306).

5. The welded pipe machine with automatic feeding and automatic splicing functions as described in claim 4, characterized in that: The conveying assembly includes a frame (401), a lifting frame (402), a conveying roller (403), a drive motor (404), and an electric push rod (405). The top of the workbench (1) is connected to the frame (401). The lifting frames (402) are slidably connected to both sides of the frame (401). The two lifting frames (402) are rotatably connected to each other on the left and right sides. The middle of the frame (401) is equipped with electric push rods (405) on both sides. The telescopic rods of the electric push rods (405) are connected to the corresponding lifting frames (402). The front lifting frame (402) is equipped with drive motors (404) on both sides. The output shafts of the drive motors (404) are fixedly connected to the front end of the corresponding conveying rollers (403). The drive motors (404) and the electric push rods (405) are electrically connected to the controller (104).

6. The welded pipe machine with automatic feeding and automatic splicing functions as described in claim 5, characterized in that: The steel strip unwinding unit (103) consists of a tensioning drum and a guide pressure roller; the steel strip leveling and pre-bending forming unit (101) consists of a multi-stage forming roller group and a side force bending roller group; the tube blank joint welding unit (102) consists of a welding host, an extrusion welding wheel and a weld seam shaping and sizing roller.

7. A pipe welding machine with automatic feeding and automatic splicing functions as described in claim 6, characterized in that: welding... The tube machine also includes a gasket (1015) and a buffer pad (1016). The top surface of the connecting plate (109) is equipped with a gasket (1015), and the bottom sides of the connecting pressure plate (1010) are connected with buffer pads (1016).

8. A pipe welding machine with automatic feeding and automatic splicing functions as described in claim 7, characterized in that: welding... The tube machine also includes a rectangular tube frame (601), a centering wheel frame (602), a tension spring (603), a contact wheel (604), a support frame (605), and an inclined block (606). The rectangular tube frame (601) is slidably connected between the right ends of the two guide rods (301). The left side wall of the rectangular tube frame (601) is fixedly connected to the right side wall of the connecting plate (109). The centering wheel frame (602) is slidably connected to both sides of the rectangular tube frame (601). The tension spring (603) is connected between both sides of the centering wheel frame (602) and the rectangular tube frame (601). The support frame (605) is connected to the right side wall of the connecting pressure plate (1010). The inclined block (606) is connected to both sides of the support frame (605). The contact wheel (604) is rotatably connected to the top of the centering wheel frame (602). The inclined working surface of the inclined block (606) and the wheel surface of the contact wheel (604) form a rolling contact fit.

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