Automatic feeding device of laser pipe cutting machine

Abstract

The invention relates to the technical field of laser pipe cutting machines, and discloses a laser pipe cutting machine automatic feeding device which comprises a feeding table, a laser cutting chamber and a discharging table, a rear clamp and a front clamp are arranged at the two ends above the feeding table respectively, a pipe is clamped between the rear clamp and the front clamp, and an automatic feeding device body is arranged in the middle above the feeding table. The automatic feeding device is used for conveying the pipes into the laser cutting chamber in a stepping mode, and the automatic feeding device is further used for conveying the pipes in a fixed-length mode and counteracting movement inertia of the pipes during conveying. The threaded cylinder is connected with the sliding base through cooperation of the insertion block and the insertion groove, when the sliding base reaches the preset position, the insertion block moves out of the insertion groove, the movement state of the threaded cylinder does not affect the sliding base any more, the sliding base can be kept stable, and after the sliding base is stable, a pipe clamped above the sliding base can also be kept stable; therefore, the influence of the motion inertia of the motor on pipe conveying can be eliminated, more accurate pipe fixed-length conveying and fixed-distance cutting are achieved, and the quality of finished products is higher.

Description

Technical Field

[0001] This invention relates to the field of laser tube cutting machine technology, specifically an automatic feeding device for a laser tube cutting machine. Background Technology

[0002] A laser pipe cutting machine is a device that uses a high-energy laser beam to cut various pipes, such as metal pipes and plastic pipes. Its working principle is that the focused laser beam generates extremely high temperatures, which instantly melt or vaporize the cutting part of the pipe. At the same time, auxiliary gases such as oxygen and nitrogen are used to blow away the molten slag, thereby achieving precise cutting of the pipe.

[0003] When a laser tube cutting machine cuts a tube, the tube needs to be fed into the cutting chamber before cutting can be performed. Generally, a feeding device is used for feeding. The power source of the feeding device is usually a motor, cylinder, or hydraulic cylinder. The driving components such as motors have motion inertia when they are running. If a motor is used as the power source to feed the tube, when the tube enters the cutting chamber, the motion inertia of the motor will cause the motor shaft to continue to rotate a certain angle. Consequently, the tube will continue to move forward a small distance, which will cause feeding errors and affect the precise cutting of the tube, thus affecting the quality of the finished product. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic feeding device for a laser tube cutting machine, so as to solve the problem mentioned in the background art that the motion inertia of motors and the like affects the fixed-distance cutting and forming quality of tubes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An automatic feeding device for a laser tube cutting machine includes a feeding table, a laser cutting chamber, and a unloading table. A rear clamp and a front clamp are respectively provided at both ends above the feeding table, and a tube is clamped between the rear clamp and the front clamp. An automatic feeding device is provided at the middle position above the feeding table. The automatic feeding device is used to step-by-step transport the tube to the laser cutting chamber. The automatic feeding device is also used to transport the tube to a fixed length and to counteract the inertia of the tube during transport.

[0006] As a further aspect of the present invention: the automatic feeding device includes two opposing tracks, which are symmetrically fixed above the feeding platform. A first clamping member and a second clamping member are respectively provided at both ends between the two tracks. A pushing member is provided in the middle between the two tracks. Rollers are provided at both ends below the two tracks. The two rollers are rotatably connected to the feeding platform and a synchronous belt is drivingly connected between the two rollers. A first clamping block is provided at the bottom of the first clamping member, and a linkage clamping block is provided at the bottom of the pushing member. The first clamping block and the linkage clamping block are both clamped and fixed on the upper side of the synchronous belt. A second clamping block is provided at the bottom of the second clamping member and is clamped and fixed on the lower side of the synchronous belt.

[0007] As a further embodiment of the present invention: the pushing member includes a support platform, which is fixed between the two tracks. A mounting platform is fixed above the support platform. Mounting brackets are fixed on both sides of the top of the mounting platform. A motor and a cylinder are respectively mounted at the two ends of the top of the mounting platform. A screw is rotatably connected between the two mounting brackets. One end of the output shaft of the motor is connected and fixed to one end of the screw. Guide rods are fixed on both sides of the screw between the two mounting brackets. A limit frame is provided on the side of the mounting platform near the cylinder. The guide rod and the screw slide through the limit frame. The output end of the cylinder slides through the mounting frame on the corresponding side and is fixed on the limit frame.

[0008] As a further embodiment of the present invention: a slide block is slidably connected above the mounting platform, the slide block is located between the two mounting brackets, the limiting bracket is disposed on one side of the slide block, the slide block is slidably connected to the guide rod and threadedly connected to the screw, clamping blocks are slidably connected to both sides of the top of the slide block, a bidirectional synchronous cylinder is installed at the middle position of the top of the slide block, the two output ends of the bidirectional synchronous cylinder are respectively connected and fixed to the clamping blocks on the corresponding sides, and through grooves are opened on the inner walls of the mounting platform and the support platform on the side corresponding to the slide block, the linkage clamping block is connected and fixed to the slide block through a bracket, and the bracket is slidably connected in the through groove.

[0009] As a further embodiment of the present invention: the slide has an internal mounting cavity with both ends extending through it, and a threaded cylinder is rotatably connected in the mounting cavity. The threaded cylinder is threaded onto the screw. A first sliding cavity is provided above the side of the slide corresponding to the mounting cavity. An insert block is slidably connected in the first sliding cavity. Multiple slots are evenly arranged around the surface of the threaded cylinder. The bottom end of the insert block is inserted into the slot. A laser ranging module is installed in the slot.

[0010] As a further embodiment of the present invention: a second sliding cavity is provided inside the slide block on one side corresponding to the first sliding cavity, with both ends penetrating through it. The second sliding cavity is interconnected with the first sliding cavity. A cam plate is slidably connected in the second sliding cavity. A V-shaped guide groove is provided on the cam plate. Both ends of the cam plate extend to the outside of the slide block. A guide post is rotatably connected to the side of the insert block facing the V-shaped guide groove. One end of the guide post is inserted into the V-shaped guide groove.

[0011] As a further embodiment of the present invention: a limiting rod is slidably inserted into the top of the insert block, one end of the limiting rod extends to the outside of the insert block and the top of the limiting rod is fixed to the inner wall of the top of the first sliding cavity, and a second spring is sleeved on the limiting rod, one end of the second spring is connected and fixed to the insert block and the other end is connected and fixed to the inner wall of the top of the first sliding cavity.

[0012] As a further embodiment of the present invention: the first clamping member and the second clamping member have the same structure and both include a slide. The first clamping block and the second clamping block are respectively fixed to the bottom of the corresponding slide. The slide is slidably connected to the two tracks. A clamping seat is fixed above the slide. The clamping seat has a cavity that extends through both ends. A cylinder is fixed in the cavity. One end of the cylinder has a cylindrical cavity and the other end has a conical cavity. The cylindrical cavity and the conical cavity are connected. The inner wall of the conical cavity expands and slopes from the outside to the inside to form an arc surface.

[0013] As a further embodiment of the present invention: a cylindrical tube is slidably connected in the cylindrical cavity, and a clamp is slidably connected in the conical cavity. The cylindrical tube and the clamp are fixedly connected and both have through holes at both ends along the axial direction. The clamp is frustum-shaped and has a plurality of ball holes evenly arranged around its surface. Each of the plurality of ball holes is movably connected to a locking ball. The plurality of ball holes are all interconnected with the holes, and one end of each of the plurality of locking balls extends into the holes.

[0014] As a further embodiment of the present invention: a first spring is sleeved on the outside of the cylindrical tube, one end of the first spring is connected and fixed to the clamp and the other end is connected and fixed to the inner wall of one side of the cylinder, a lever is fixed on the top of the clamp, and the inner wall of the top of the cylinder and the inner wall of the top of the clamp are both provided with interconnected sliding grooves, one end of the lever is slidably connected in the sliding groove and the other end of the lever passes through the sliding groove and extends to the top of the clamp.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, two linked clamping members are set at both ends of the pipe. Both clamping members are connected to the pushing member through a synchronous belt. When the pushing member moves in the forward or reverse direction, it will always move one of the two clamping members toward the laser cutting chamber. When the clamping member moves toward the laser cutting chamber, it will feed the pipe into the cutting chamber for cutting, thus realizing the continuity of pipe feeding. At the same time, the cooperation of the two clamping members can also make up for the short stroke of the pushing member itself. Furthermore, the two clamping components position the two ends of the pipe respectively. When one clamping component releases the pipe, the other clamping component will clamp the pipe. The pipe is always positioned by the two clamping components during the conveying process, making the pipe conveying more stable. Furthermore, by setting up a motor to transport the pipe, and by using two clamping and pushing components in combination, the pipe can be continuously and regularly transported. The product has a compact structure, uses a simple mechanical structure to achieve regular and continuous transport, and operates more stably with lower costs. Furthermore, the threaded cylinder in the pusher is connected to the slide by the cooperation of the insert and the slot. When the slide reaches the predetermined position, the insert moves out of the slot. At this time, the slide and the threaded cylinder are unlocked. The movement of the threaded cylinder no longer affects the slide, and the slide can remain stable. After the slide is stable, the pipe clamped above it can also remain stable. This can eliminate the influence of the motor's motion inertia on the pipe conveying, achieve more precise pipe length conveying and distance cutting, and result in higher quality finished products. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a first-view diagram of the present invention.

[0018] Figure 2 This is a second perspective view of the present invention.

[0019] Figure 3 This is a first-view view of the automatic feeding device in this invention.

[0020] Figure 4 This is a second-view view of the automatic feeding device in this invention.

[0021] Figure 5 This is a schematic diagram of the clamping components in an automatic feeding device.

[0022] Figure 6 This is a structural separation diagram of the clamping components in an automatic feeding device.

[0023] Figure 7 This is a first-view view of the pusher component in an automatic feeding device.

[0024] Figure 8 This is a second-view diagram of the pusher component in an automatic feeding device.

[0025] Figure 9 This is a structural separation diagram of the pusher component in an automatic feeding device.

[0026] Figure 10 This is a structural separation diagram of the slide and clamping block in the pusher component.

[0027] Figure 11 This is a schematic diagram of the internal structure of the slide block in the pusher component.

[0028] Figure 12 This is a first-person view of the internal structure of the slide after separation.

[0029] Figure 13 for Figure 12 Enlarged view of point A in the middle.

[0030] Figure 14 This is a second-view diagram of the internal structure of the slide after separation.

[0031] Figure reference numerals: 1-Feeding table, 2-Automatic feeding device, 21-Railway, 22-First clamping component, 221-First clamping block, 222-Slide table, 223-Clamping seat, 224-Cavity, 225-Cylinder, 226-Cylindrical cavity, 227-Conical cavity, 228-Circular tube, 229-Clamping head, 2210-Ball hole, 2211-Locking ball, 2212-First spring, 2213-Lever, 2214-Slide groove, 23-Pushing component, 231-Linkage clamping block, 232-Supporting platform, 233-Mounting platform, 234-Mounting bracket, 235-Motor, 236-Cylinder, 237-Limiting bracket, 238-Guide rod, 23 9-Screw, 2310-Slide, 2311-Clamping block, 2312-Through groove, 2313-Two-way synchronous cylinder, 2314-Threaded cylinder, 2315-Insertion block, 2316-Cam plate, 2317-Mounting cavity, 2318-First sliding cavity, 2319-Limit rod, 2320-Second spring, 2321-Guide post, 2322-V-shaped guide groove, 2323-Slot, 2324-Laser ranging module, 2325-Second sliding cavity, 24-Second clamping component, 241-Second clamping block, 25-Synchronous belt, 26-Roller, 3-Laser cutting chamber, 4-Unloading platform, 5-Rear clamp, 6-Pipe, 7-Front clamp. Detailed Implementation

[0032] The following embodiments will describe the present invention in detail with reference to the accompanying drawings. In the drawings or description, similar or identical parts are referred to by the same reference numerals, and in practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this invention are merely illustrative and not intended to limit the scope of the invention. Any obvious modifications or changes made to this invention do not depart from the spirit and scope of the invention.

[0033] Please see Figures 1-2 In this embodiment of the invention, an automatic feeding device for a laser tube cutting machine includes a feeding platform 1, a laser cutting chamber 3, and a unloading platform 4. One end of the feeding platform 1 and the unloading platform 4 extends into the laser cutting chamber 3. A rear clamp 5 and a front clamp 7 are respectively provided at both ends above the feeding platform 1. The front clamp 7 is located on one side of the laser cutting chamber 3. The tube 6 is clamped between the rear clamp 5 and the front clamp 7. An automatic feeding device 2 is provided in the middle position above the feeding platform 1. The automatic feeding device 2 is used to step-by-step convey the tube 6 into the laser cutting chamber 3. The automatic feeding device 2 is also used to convey the tube 6 to a fixed length and counteract the inertia of the tube during conveying, so as to achieve more precise tube cutting at a fixed distance. In this embodiment, the rear clamp 5 and the front clamp 7 respectively clamp the two ends of the pipe 6. Both the rear clamp 5 and the front clamp 7 can be existing clamps for holding pipes, and can be used according to existing technology. The pipe 6 passes through the automatic feeding device 2 and is fed into the laser cutting chamber 3 by the automatic feeding device 2. The laser cutting chamber 3 is equipped with a laser cutting machine, which can be used with existing devices and technologies. The cut material falls onto the unloading platform 4 and is sent out. The unloading platform 4 can be equipped with a belt conveyor or a roller conveyor to send the material out. Both the belt conveyor and the roller conveyor can be used with existing devices and technologies. Alternatively, the unloading platform 4 can be set as an inclined platform, and the material falls onto the inclined platform and then slides down.

[0034] Please see Figures 3-4 The automatic feeding device 2 includes two oppositely arranged tracks 21, which are symmetrically fixed above the feeding table 1. A first clamping member 22 and a second clamping member 24 are respectively provided at both ends between the two tracks 21. A pushing member 23 is provided in the middle between the two tracks 21. Rollers 26 are provided at both ends below the two tracks 21. The two rollers 26 are rotatably connected to the feeding table 1 and a synchronous belt 25 is connected between the two rollers 26. The synchronous belt 25 is located below the two tracks 21. The bottom of the first clamping member 22 is provided with a first clamping block 221, and the bottom of the pushing member 23 is provided with a linkage clamping block 231. Both the first clamping block 221 and the linkage clamping block 231 are clamped and fixed on the upper side of the synchronous belt 25. The bottom of the second clamping member 24 is provided with a second clamping block 241, and the second clamping block 241 is clamped and fixed on the lower side of the synchronous belt 25. In this embodiment, both ends of the pipe 6 are clamped and positioned by the first clamping member 22 and the second clamping member 24, respectively. Simultaneous positioning of both ends ensures stability during pipe transport and effectively prevents pipe detachment. A pushing member 23 is provided in the middle of the pipe, which can drive the pipe forward. The first clamping member 22 and the pushing member 23 are fixed to the same side of the synchronous belt 25 by their respective clamping blocks. The movement of the first clamping member 22 and the pushing member 23 is synchronized and in the same direction. The second clamping member 24 is clamped and fixed to the other side of the synchronous belt 25. The movement of the second clamping member 24 is synchronized and in the same direction as the pushing member 23. In the reverse direction, when the pusher 23 moves forward with the tube 6, the tube 6 is fed to one side of the laser cutting chamber 3. When the pusher 23 releases the tube 6 and moves backward, the second clamping member 24 will also clamp the tube 6 and continue to move forward to achieve continuous feeding. Moreover, the distances of these two feedings are the same, which can realize the fixed-distance conveying of the tube 6. The first clamping member 22 and the second clamping member 24 cooperate with each other. During the back-and-forth movement of the pusher 23, the tube 6 is always moved towards one side of the laser cutting chamber 3. This can also make up for the short stroke of the pusher 23, which is beneficial to the fixed-distance cutting of the tube 6.

[0035] Please see Figures 5-6 The first clamping member 22 and the second clamping member 24 have the same structure and both include a slide table 222. The first clamping block 221 and the second clamping block 241 are respectively fixed to the bottom of the corresponding slide table 222. The slide table 222 is slidably connected to two tracks 21. A clamping seat 223 is fixed above the slide table 222. A cavity 224 with both ends through is opened in the clamping seat 223. A cylinder 225 is fixed in the cavity 224. A cylindrical cavity 226 is opened at one end of the cylinder 225 and a conical cavity 227 is opened at the other end. The cylindrical cavity 226 and the conical cavity 227 are connected. The inner wall of the conical cavity 227 expands and slopes from the outside to the inside to form an arc surface. A cylindrical cavity 226 is slidably connected to a round tube 228, and a conical cavity 227 is slidably connected to a collet 229. The round tube 228 and the collet 229 are fixedly connected and both have through holes at both ends along the axial direction. One end of the tube 6 enters through the hole at the collet 229 and exits through the hole at the round tube 228. The collet 229 is frustum-shaped and its surface is evenly surrounded by multiple ball holes 2210. Each ball hole 2210 is movably connected to a locking ball 2211. The multiple ball holes are all connected to the holes, and one end of each locking ball 2211 extends into the hole. A first spring 2212 is sleeved on the outside of the round tube 228. One end of the first spring 2212 is connected and fixed to the clamp 229 and the other end is connected and fixed to the inner wall of one side of the cylinder 225. A lever 2213 is fixed on the top of the clamp 229. The inner wall of the top of the cylinder 225 and the inner wall of the top of the clamp 223 are both provided with interconnected sliding grooves 2214. One end of the lever 2213 is slidably connected in the sliding groove 2214 and the other end of the lever 2213 passes through the sliding groove 2214 and extends to the top of the clamp 223. In this embodiment, one end of the tube 6 is inserted into the clamp 229 and exits through the round tube 228. A locking ball 2211 is provided at the clamp 229. When the clamping member moves toward the laser cutting chamber 3, the direction of the friction between the locking ball 2211 and the tube 6 is opposite to the direction of movement. At this time, under the action of friction, the clamp 229 will slide outward from the conical cavity 227. Under the pressure of the arc-shaped inner wall of the conical cavity 227, the locking ball 2211 will move toward the ball hole 2210. Multiple locking balls 2211 cooperate with each other and press against the outer wall of the tube 6 from multiple directions, moving the tube 6 toward the laser cutting chamber 3 simultaneously. When the clamping component moves away from the laser cutting chamber 3, under the action of friction, the chuck 229 will slide into the conical cavity 227, and the locking ball 2211 will move outward in the ball hole 2210. The multiple locking balls 2211 will no longer press against the outer wall of the tube 6, the tube 6 will be released and no longer clamped, and the clamping component can move to the unprocessed rear end of the tube to prepare for the next movement of the tube. At this time, the clamping component slides on the surface of the tube 6, and one end of the tube is still located in the hole inside the chuck and the round tube. When the clamping component moves backward, it can still position the tube to prevent the tube from falling off.

[0036] Please see Figures 7-10 The pusher 23 includes a support platform 232, which is fixed between two rails 21. A mounting platform 233 is fixed above the support platform 232. Mounting brackets 234 are fixed on both sides of the top of the mounting platform 233. A motor 235 and a cylinder 236 are respectively mounted at the two ends of the top of the mounting platform 233. A screw 239 is rotatably connected between the two mounting brackets 234. One end of the output shaft of the motor 235 is connected and fixed to one end of the screw 239. Guide rods 238 are fixed on both sides of the screw 239 between the two mounting brackets 234. A limit frame 237 is provided on the side of the mounting platform 233 near the cylinder 236. The guide rods 238 and the screw 239 slide through the limit frame 237. The output end of the cylinder 236 slides through the mounting bracket 234 on the corresponding side and is fixed on the limit frame 237. A slide block 2310 is slidably connected above the mounting platform 233. The slide block 2310 is located between two mounting brackets 234. A limit bracket 237 is set on one side of the slide block 2310. The slide block 2310 is slidably connected to the guide rod 238 and threadedly connected to the screw rod 239. Clamping blocks 2311 are slidably connected to both sides of the top of the slide block 2310. A bidirectional synchronous cylinder 2313 is installed in the middle of the top of the slide block 2310. The two output ends of the bidirectional synchronous cylinder 2313 are respectively connected and fixed to the clamping blocks 2311 on the corresponding side. A through groove 2312 is opened on the inner wall of the mounting platform 233 and the support platform 232 on the side corresponding to the slide block 2310. The linkage clamping block 231 is connected and fixed to the slide block 2310 through the bracket, and the bracket is slidably connected in the through groove 2312. In this embodiment, the slide block 2310 can be driven to move back and forth on the mounting platform 233 by the cooperation of the motor 235, screw 239 and guide rod 238. When the slide block 2310 moves, the synchronous belt 25 can be driven to move through the linkage clamping block 231 connected to it, thereby driving the two clamping parts to move accordingly. The top of the slide block 2310 is provided with two clamping blocks 2311 and a bidirectional synchronous cylinder 2313. The bidirectional synchronous cylinder 2313 drives the two clamping blocks 2311 to move inward synchronously, clamping the pipe 6 from the front and rear sides. After clamping, the slide block 2310 can move forward with the pipe 6. The limiting frame 237 can slide on the mounting platform 233 after being driven by the cylinder 236. The closer the limiting frame 237 is to the slide block 2310, the shorter the stroke of the slide block 2310. Correspondingly, the distance that the pipe 6 can move forward is shorter, thereby realizing the fixed-length conveying and fixed-distance cutting of the pipe.

[0037] Please see Figures 11-14 The slide block 2310 has an internal mounting cavity 2317 that extends through both ends. A threaded cylinder 2314 is rotatably connected in the mounting cavity 2317. The threaded cylinder 2314 is threaded onto the screw 239. A first sliding cavity 2318 is provided above the side of the slide block 2310 corresponding to the mounting cavity 2317. An insert block 2315 is slidably connected in the first sliding cavity 2318. Multiple slots 2323 are evenly arranged around the surface of the threaded cylinder 2314. The bottom end of the insert block 2315 is inserted into the slot 2323. A limiting rod 2319 is slidably inserted into the top of the insert block 2315. One end of the limiting rod 2319 extends to the outside of the insert block 2315 and the top of the limiting rod 2319 is fixed to the top inner wall of the first sliding cavity 2318. A second spring 2320 is sleeved on the limiting rod 2319. One end of the second spring 2320 is connected and fixed to the insert block 2315 and the other end is connected and fixed to the top inner wall of the first sliding cavity 2318. When the insert block 2315 slides upward, the limiting rod 2319 is further inserted into the insert block 2315, and the second spring 2320 is also compressed. A second sliding cavity 2325 is provided inside the slide block 2310 on one side corresponding to the first sliding cavity 2318, with both ends passing through. The second sliding cavity 2325 is interconnected with the first sliding cavity 2318. A cam plate 2316 is slidably connected in the second sliding cavity 2325. A V-shaped guide groove 2322 is provided on the cam plate 2316. Both ends of the cam plate 2316 extend to the outside of the slide block 2310. A guide post 2321 is rotatably connected to the side of the insert block 2315 facing the V-shaped guide groove 2322. One end of the guide post 2321 is inserted into the V-shaped guide groove 2322. A laser ranging module 2324 is installed in slot 2323. The laser ranging module 2324 includes a laser emitter and a laser receiver, which are located at opposite ends of slot 2323. When the insert block 2315 is inserted into slot 2323, the laser emitted by the laser emitter is blocked. When the insert block 2315 is removed from slot 2323, the laser receiver can receive the laser emitted by the laser emitter. Both the laser emitter and the laser receiver can be used with devices and technologies. The operation of motor 235 is controlled by whether or not the laser can be received as a signal. Correspondingly, signal processing and motor control modules also need to be set up. These corresponding electrical control modules can all use existing technologies, so they will not be described in detail. In this embodiment, the threaded cylinder 2314 is threadedly connected to the screw 239. When the insert block 2315 is inserted into the slot 2323 on the threaded cylinder, the threaded cylinder 2314 is fixed by the slide block 2310, and the two form a whole. When the screw 239 rotates, the slide block 2310 slides on the mounting platform 233. When the insert block 2315 is removed from the slot 2323, the threaded cylinder 2314 is no longer fixed to the slide block 2310, and there will be a rotatable connection between it and the slide block. At this time, when the screw 239 rotates again, the threaded cylinder 2314 will rotate with the screw. In the initial state, the slide 2310 is located on the right side of the mounting bracket 234, which is closer to the motor 235. As the motor starts, the slide 2310 moves towards the limit bracket 237. When it reaches the limit bracket 237, the cam plate 2316 slides to one side in the opposite direction due to the obstruction of the limit bracket 237. At this time, the insert block 2315 slides upward under the action of the guide post 2321 and the V-shaped guide groove 2322. The insert block 2315 moves out of the slot 2323, and the threaded cylinder 2314 is no longer locked. The threaded cylinder 2314 will rotate with the screw 239. The slide block 2315 has moved out of the slot, and the slide block 2310 and the threaded cylinder 2314 are no longer a single unit. The movement of the threaded cylinder 2314 will not affect the slide block 2310, and the slide block 2310 will remain stationary. Correspondingly, the pipe 6 clamped above it will also remain stationary, thus effectively overcoming the inertial influence of power output components such as motors or cylinders during operation. The inertia of the motor movement is offset by the structure of the insert block and the threaded cylinder, making the pipe conveying more precise. Correspondingly, the fixed-distance cutting will also be more precise, and the product quality will be higher.

[0038] Working principle: The pipe 6 to be cut is placed on the feeding table 1. The two ends of the pipe 6 are clamped by the front and rear clamps. At the same time, the pipe 6 is passed through the automatic feeding device 2. In the initial state, the slide 2310 inside the pusher 23 in the automatic feeding device 2 is located on the side of the mounting bracket 234 at the left end. The distance between the limit bracket 237 in the pusher 23 and the front end of the slide 2310 is adjusted according to the required length of the pipe to be cut (denoted as D1). D1 is the length of the pipe to be cut at a fixed distance. The pipe 6 is clamped by the cooperation of the clamping block 2311 and the bidirectional synchronous cylinder 2313. Then the motor 235 is started. The motor 235 drives the screw 239 to rotate. The screw 239 is threadedly engaged with the threaded cylinder 2314. At this time, the threaded cylinder 2314 is fixed to the slide 2310 and will drive the slide 2310 to slide on the two guide rods 238. When the slide block 2310 slides towards the limit frame 237, it will drive the first clamping member 22 to move synchronously in the same direction through the synchronous belt 25, and drive the second clamping member 24 to move synchronously in the opposite direction. At this time, the slide block 2310 and the first clamping member 22 will clamp the tube 6 and send it to the laser cutting chamber 3. The second clamping member 24 will release the tube 6 and slide on the surface of the tube 6. When the front end of the slide block 2310 reaches the limit frame 237, it will be blocked and the inertia of the movement will be buffered (achieved through the buffer structure set inside). The slide block 2310 will stop moving when the front end reaches the limit frame 237. At this time, the tube 6 will be sent into the laser cutting chamber 3 for cutting according to the predetermined length (i.e., D1). After one cut is completed, the clamping block 2311 is released, so that the pusher 23 no longer clamps the tube 6. Then, the motor 235 is started in reverse, so that the slide 2310 moves away from the limit frame 237. At this time, the first clamping member 22 will release the tube 6 and slide on the surface of the tube 6, while the second clamping member 24 will clamp the tube 6. The movement direction of the second clamping member 24 is opposite to that of the slide 2310. The second clamping member 24 will move to one side of the laser cutting chamber 3 and continue to send the tube 6 into the laser cutting chamber 3 for cutting. When the rear end of the slide 2310 reaches the mounting frame 234 on the left, it stops moving. At this time, the distance that the slide 2310 has moved is still D1. Correspondingly, the length of the tube sent by the second clamping member 24 is also D1. The first clamping member 22, the pusher 23 and the second clamping member 24 work together to realize the continuous and fixed-distance conveying of the tube 6, improve processing efficiency, and achieve high fixed-distance accuracy, resulting in better quality after product forming. When it is necessary to cut a longer pipe, it can be achieved by accumulating multiple D1 values. This allows the slide 2310 to reciprocate between the limit frame 237 and the mounting frame 234 at the left end. Each movement distance is D1, and the required fixed length can be obtained by adding multiple D1 values ​​together.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic feeding device for a laser tube cutting machine, comprising a feeding table (1), a laser cutting chamber (3), and a unloading table (4), wherein a rear clamp (5) and a front clamp (7) are respectively provided at both ends above the feeding table (1), and a tube (6) is clamped between the rear clamp (5) and the front clamp (7), characterized in that, An automatic feeding device (2) is provided at the middle position above the feeding platform (1). The automatic feeding device (2) is used to step-by-step transport the pipe (6) to the laser cutting chamber (3). The automatic feeding device (2) is also used to transport the pipe (6) at a fixed length and to counteract the inertia of the pipe during transport.

2. The automatic feeding device for a laser tube cutting machine according to claim 1, characterized in that, The automatic feeding device (2) includes two opposing tracks (21), which are symmetrically fixed above the feeding table (1). A first clamping member (22) and a second clamping member (24) are respectively provided at both ends between the two tracks (21). A pushing member (23) is provided in the middle between the two tracks (21). Rollers (26) are provided at both ends below the two tracks (21), and both rollers (26) are rotatably connected to the feeding table (1). A synchronous belt (25) is connected between the rollers (26). A first clamping block (221) is provided at the bottom of the first clamping member (22), and a linkage clamping block (231) is provided at the bottom of the pushing member (23). The first clamping block (221) and the linkage clamping block (231) are both clamped and fixed on the upper side of the synchronous belt (25). A second clamping block (241) is provided at the bottom of the second clamping member (24), and the second clamping block (241) is clamped and fixed on the lower side of the synchronous belt (25).

3. The automatic feeding device for a laser tube cutting machine according to claim 2, characterized in that, The pusher (23) includes a support platform (232) fixed between the two tracks (21). A mounting platform (233) is fixed above the support platform (232). Mounting brackets (234) are fixed on both sides of the top of the mounting platform (233). A motor (235) and a cylinder (236) are respectively mounted at both ends of the top of the mounting platform (233). A screw (239) is rotatably connected between the two mounting brackets (234). One end of the output shaft of the motor (235) is connected to the... One end of the screw (239) is fixed. Guide rods (238) are fixed on both sides of the screw (239) between the two mounting brackets (234). A limit bracket (237) is provided on the side of the mounting platform (233) near the cylinder (236). The guide rods (238) and the screw (239) slide through the limit bracket (237). The output end of the cylinder (236) slides through the mounting bracket (234) on the corresponding side and is fixed on the limit bracket (237).

4. The automatic feeding device for a laser tube cutting machine according to claim 3, characterized in that, A slide block (2310) is slidably connected above the mounting platform (233). The slide block (2310) is located between the two mounting brackets (234). The limiting bracket (237) is disposed on one side of the slide block (2310). The slide block (2310) is slidably connected to the guide rod (238) and threadedly connected to the screw rod (239). Clamping blocks (2311) are slidably connected to both sides of the top of the slide block (2310). 0) A bidirectional synchronous cylinder (2313) is installed at the middle position of the top. The two output ends of the bidirectional synchronous cylinder (2313) are respectively connected and fixed to the clamping block (2311) on the corresponding side. The inner wall of the mounting platform (233) and the support platform (232) are provided with through grooves (2312) on the side corresponding to the slide (2310). The linkage clamping block (231) is connected and fixed to the slide (2310) through the bracket, and the bracket is slidably connected in the through groove (2312).

5. The automatic feeding device for a laser tube cutting machine according to claim 4, characterized in that, The slide block (2310) has an internal mounting cavity (2317) that extends through both ends. A threaded cylinder (2314) is rotatably connected in the mounting cavity (2317). The threaded cylinder (2314) is threaded onto the screw (239). A first sliding cavity (2318) is provided above the side of the slide block (2310) corresponding to the mounting cavity (2317). An insert block (2315) is slidably connected in the first sliding cavity (2318). Multiple slots (2323) are evenly arranged around the surface of the threaded cylinder (2314). The bottom end of the insert block (2315) is inserted into the slot (2323). A laser ranging module (2324) is installed in the slot (2323).

6. The automatic feeding device for a laser tube cutting machine according to claim 5, characterized in that, The slide block (2310) has a second sliding cavity (2325) with both ends through it on one side corresponding to the first sliding cavity (2318). The second sliding cavity (2325) is connected to the first sliding cavity (2318). A cam plate (2316) is slidably connected in the second sliding cavity (2325). A V-shaped guide groove (2322) is provided on the cam plate (2316). Both ends of the cam plate (2316) extend to the outside of the slide block (2310). A guide post (2321) is rotatably connected to the side of the insert block (2315) facing the V-shaped guide groove (2322). One end of the guide post (2321) is inserted into the V-shaped guide groove (2322).

7. The automatic feeding device for a laser tube cutting machine according to claim 6, characterized in that, The top end of the insert (2315) is slidably inserted with a limiting rod (2319). One end of the limiting rod (2319) extends to the outside of the insert (2315), and the top end of the limiting rod (2319) is fixed on the top inner wall of the first sliding cavity (2318). A second spring (2320) is sleeved on the limiting rod (2319). One end of the second spring (2320) is connected and fixed to the insert (2315), and the other end is connected and fixed to the top inner wall of the first sliding cavity (2318).

8. The automatic feeding device for a laser tube cutting machine according to claim 2, characterized in that, The first clamping member (22) and the second clamping member (24) have the same structure and both include a slide (222). The first clamping block (221) and the second clamping block (241) are respectively fixed at the bottom of the corresponding slide (222). The slide (222) is slidably connected to the two tracks (21). A clamping seat (223) is fixed above the slide (222). A cavity (224) with two through ends is opened in the clamping seat (223). A cylinder (225) is fixed in the cavity (224). A cylindrical cavity (226) is opened at one end of the cylinder (225) and a conical cavity (227) is opened at the other end. The cylindrical cavity (226) and the conical cavity (227) are connected. The inner wall of the conical cavity (227) expands and tilts from the outside to the inside to form an arc surface.

9. The automatic feeding device for a laser tube cutting machine according to claim 8, characterized in that, A cylindrical tube (228) is slidably connected in the cylindrical cavity (226), and a chuck (229) is slidably connected in the conical cavity (227). The cylindrical tube (228) and the chuck (229) are fixedly connected and both have through holes at both ends along the axial direction. The chuck (229) is frustum-shaped and has multiple ball holes (2210) evenly arranged around its surface. Each of the multiple ball holes (2210) is movably connected to a locking ball (2211). The multiple ball holes are all connected to the holes, and one end of each of the multiple locking balls (2211) extends into the hole.

10. The automatic feeding device for a laser tube cutting machine according to claim 9, characterized in that, A first spring (2212) is sleeved on the outside of the cylindrical tube (228). One end of the first spring (2212) is connected and fixed to the clamp (229), and the other end is connected and fixed to the inner wall of one side of the cylindrical tube (225). A lever (2213) is fixed on the top of the clamp (229). The inner wall of the top of the cylindrical tube (225) and the inner wall of the top of the clamp (223) are provided with interconnected sliding grooves (2214). One end of the lever (2213) is slidably connected in the sliding groove (2214), and the other end of the lever (2213) passes through the sliding groove (2214) and extends to the top of the clamp (223).

Images