Pipe laser cutting continuous feeding device and method

Abstract

The pipe laser cutting continuous feeding device comprises a workbench, empty grooves are formed in the two sides of the workbench in the extending direction of the workbench, and a supporting plate and a guide block are arranged at the two ends of the workbench correspondingly; the two groups of moving assemblies are respectively arranged in the empty grooves; the two clamping assemblies alternately carry out feeding and resetting actions, it is ensured that uninterrupted feeding is achieved in the laser cutting process of pipes, the single-set feeding return stroke time is eliminated, the machining efficiency is improved, a first spring automatically pushes a moving rod to retract when no air pressure exists, it is ensured that the clamping assemblies reset in time, and the machining efficiency is improved. And collision or interference when the clamping assemblies on the two sides meet is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting equipment, and in particular to a continuous feeding device and method for laser cutting of pipes. Background Art

[0002] When a laser cutting machine cuts a pipe, due to the long length of the pipe, the return stroke of the conveying mechanism is too long during cutting and feeding, which affects the feeding efficiency and reduces the cutting efficiency of the pipe. Therefore, a continuous feeding device and method for laser cutting of pipes are proposed to solve this problem. Summary of the Invention

[0003] The present invention aims to solve the problems existing in the prior art and provides the following technical solutions:

[0004] Continuous feeding device for tube laser cutting, including:

[0005] A workbench, wherein slots are provided on both sides of the workbench and along its extension direction, and support plates and guide blocks are provided at both ends of the workbench respectively;

[0006] Two groups of movable components are respectively arranged in the empty slots;

[0007] The pushing assembly includes a cylinder body fixedly mounted on the moving mechanism, a moving rod movably mounted at one end of the cylinder body, a piston mounted at one end of the moving rod located inside the cylinder body, and a spring wound around a section of the moving rod located inside the cylinder body. An air inlet pipe and an air outlet pipe are respectively connected to the interior of the cylinder body.

[0008] The clamping assembly includes a frame fixedly mounted on one end of the moving rod, a pusher mounted on the top and bottom of the frame, and a clamping plate fixedly mounted on the output end of the pusher, wherein the driving chamber of the pusher is connected to the cylinder through a connecting pipe;

[0009] Among them, the two groups of moving components are controlled to drive the pushing components fixed thereto to move in opposite directions; when one group of moving components drives its pushing component to move from the support plate to the guide block, the air inlet pipe delivers compressed gas to the cylinder body 1 of the pushing component, pushing the piston 1 and the moving rod 1 to extend outward to overcome the elastic force of the spring 1, thereby driving the clamping component to extend; after the clamping component is extended, the compressed gas continuously entering the cylinder body 1 enters the driving chamber of the pushing member through the connecting pipe, driving the pushing member to move and pushing the clamping plates to move in the direction of approaching each other, clamping the pipe and moving with the moving component; at the same time, the gas in the cylinder body 1 of the other group of pushing components is discharged from the air outlet pipe, so that the moving rod 1 of this group of pushing components retracts under the action of the spring 1.

[0010] As an improvement of the above technical solution, the moving component includes a screw rod rotatably inserted into the empty groove and a threaded sleeve threadedly sleeved on the surface of the screw rod. One end of the screw rod passes through the workbench and extends to the outside of the workbench. The top fixed bracket of the threaded sleeve is fixedly connected to the cylinder body.

[0011] As an improvement to the above technical solution, it also includes a driving assembly, which includes a rotating shaft rotatably arranged at the end of the workbench, a bevel gear 2 fixedly arranged on the end of the screw extending to the outside of the workbench, and a bevel gear 1 fixedly sleeved on the surface of the rotating shaft and whose number and position match those of the bevel gear 2.

[0012] As an improvement of the above technical solution, the pushing member includes a cylinder body 2 fixedly inserted on the frame body, a moving rod 2 movably inserted at the two ends of the cylinder body, and a piston 2 fixedly arranged on one end of the moving rod 2 located inside the cylinder body 2. A section of the moving rod 2 located inside the cylinder body 2 is wound with a spring 2, and the end of the moving rod 2 away from the piston 2 is fixedly connected to the clamping plate.

[0013] As an improvement to the above technical solution, the elastic force of the second spring is greater than the elastic force of the first spring.

[0014] As an improvement to the above technical solution, a V-shaped groove is provided at one end of the clamping plate away from the second moving rod.

[0015] A continuous feeding method for laser cutting of pipes, using the above-mentioned continuous feeding device for laser cutting of pipes, comprises the following steps:

[0016] S1 Feeding: Control the side moving assembly to drive it as a whole to move from the support plate to the guide block, open the solenoid valve on the air inlet pipe of this group, and introduce compressed gas into the cylinder body 1 of this group. The compressed gas overcomes the elastic force of spring 1, pushes piston 1 and moving rod 1 to extend, and drives the frame forward to the predetermined clamping position. The compressed gas continuously entering the cylinder body 1 increases in pressure and is transported to the pusher, driving the clamping plates inward to clamp the pipe;

[0017] S2 reset: When the clamping assembly completes the feeding task, the moving assembly drives the entire assembly to move from the guide block to the support plate, opens the solenoid valve on the exhaust pipe of the group, and the gas inside the cylinder body 1 and the pusher is discharged through the exhaust pipe. The clamping plate releases the pipe, and the elastic force of the spring 1 pushes the piston 1 and the moving rod 1 to retract, driving the frame to return to its initial position;

[0018] S3: When the feeding group completes the feeding task, the group switches to the reset state and executes step S2. At the same time, the group that has completed the reset is switched to the feeding state and executes step S1. The two groups of clamping components alternately perform feeding and reset actions to achieve continuous feeding of pipes.

[0019] Beneficial effects of the present invention:

[0020] The two sets of clamping components alternately perform feeding and resetting actions to ensure uninterrupted feeding of pipes during the laser cutting process, eliminate the return time of a single set of feeding, and improve processing efficiency. Spring 1 automatically pushes the moving rod to retract when there is no air pressure, ensuring that the clamping components are reset in time and preventing collision or interference when the clamping components on both sides meet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of the overall structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 A in the middle is an enlarged structural diagram;

[0023] Figure 3 Schematic diagram of the clamping assembly of the present invention.

[0024] Figure numerals: 10, workbench; 11, empty slot; 20, screw rod; 21, threaded sleeve; 30, rotating shaft; 31, conical wheel one; 32, conical wheel two; 40, cylinder body one; 41, moving rod one; 42, piston one; 43, spring one; 44, air outlet pipe; 45, air inlet pipe; 50, cylinder body two; 51, piston two; 52, moving rod two; 53, clamping plate; 54, spring two; 55, connecting pipe; 56, frame; 60, guide block; 70, support plate. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] Example 1

[0027] The continuous feeding device for laser cutting of pipes comprises: a workbench 10, with slots 11 formed on both sides of the workbench 10 and along its extension direction, and support plates 70 and guide blocks 60 respectively provided at both ends of the workbench 10;

[0028] Two groups of movable components are respectively arranged in the empty slots 11;

[0029] The pushing assembly includes a cylinder 40 fixedly mounted on the moving mechanism, a moving rod 41 movably mounted at the end of the cylinder 40, a piston 42 fixedly mounted at one end of the moving rod 41 located inside the cylinder 40, and a spring 43 wound around a section of the moving rod 41 located inside the cylinder 40. An air inlet pipe 45 and an air outlet pipe 44 are respectively connected to the interior of the cylinder 40.

[0030] The clamping assembly includes a frame 56 fixedly mounted on the end of the moving rod 41, a pusher mounted on the top and bottom of the frame 56, and a clamping plate 53 fixedly mounted on the output end of the pusher. The driving chamber of the pusher is connected to the cylinder 40 via a connecting pipe 55.

[0031] Among them, the two groups of moving components are controlled to drive the pushing components fixed thereto to move in opposite directions. When one group of moving components drives its pushing component to move from the support plate 70 to the guide block 60, the air inlet pipe 45 delivers compressed gas to the cylinder body 40 of the pushing component, pushing the piston 42 and the moving rod 41 to extend outward to overcome the elastic force of the spring 43, thereby driving the clamping component to extend; after the clamping component is extended, the compressed gas continuously entering the cylinder body 40 enters the driving chamber of the pushing member through the connecting pipe 55, drives the pushing member to move and pushes the clamping plates to move in the direction of approaching each other, clamping the pipe and moving with the moving component; at the same time, the gas in the cylinder body 40 of the other group of pushing components is discharged by the air outlet pipe 44, so that the moving rod 41 of this group of pushing components retracts under the action of the spring 43.

[0032] Specifically, two sets of moving components are located at both ends of the workbench 10;

[0033] Initial state of the pusher assembly near the support plate 70: piston 1 42 in cylinder 1 40 is retracted under the action of spring 1 43, moving rod 1 41 is not extended, air inlet pipe 45 and air outlet pipe 44 are not ventilated, there is no compressed gas in the driving chamber of the pusher, and the clamping plate 53 is in a released state;

[0034] In the initial state of the pusher assembly near the guide block 60, the movable rod 2 in the cylinder 1 40 is in an extended state under the action of the compressed gas, the air inlet pipe 45 and the air outlet pipe 44 are not ventilated, the driving chamber of the pusher contains compressed gas, and the clamping plate 53 is in a clamped state;

[0035] When the moving component is required to drive the pushing component to move from the support plate 70 to the guide block 60 to achieve clamping and feeding, the solenoid valve of the air intake pipe 45 is opened, and the air intake pipe 45 delivers compressed gas to the cylinder 40 of the pushing component, pushing the piston 42 and the moving rod 41 to extend outward to overcome the elastic force of the spring 43, thereby driving the clamping component to extend; after the clamping component is extended, the compressed gas continuously entering the cylinder 40 enters the driving chamber of the pushing member through the connecting pipe 55, driving the pushing member to move and push the clamping plates 53 to move in the direction of approaching each other, clamping the pipe and moving it. The moving assembly moves; at the same time, the moving assembly on the other side drives the pushing assembly to start retreating from the support guide block 60 to the support plate 70, the solenoid valve on the air outlet pipe 44 opens, and the gas in the cylinder body 40 of the pushing assembly is discharged from the air outlet pipe 44, so that the moving rod 41 of this group of pushing assemblies retracts under the action of the spring 43, and the above-mentioned clamping feeding-retraction process is repeated to realize alternating feeding on both sides, thereby realizing continuous moving feeding of the pipe. The spring 43 pushes the moving rod 41 to retract when there is no air pressure, ensuring that the clamping assembly is reset in the non-working state to avoid interference between the two groups of clamping assemblies when they meet.

[0036] In one embodiment, the moving assembly includes a screw rod 20 rotatably inserted into the empty groove 11 and a threaded sleeve 21 threadedly sleeved on the surface of the screw rod 20. One end of the screw rod 20 passes through the workbench 10 and extends to the outside of the workbench 10. The top fixed bracket of the threaded sleeve 21 is fixedly connected to the cylinder body 40. External force drives the screw rod 20 to rotate forward and reverse, and the screw rod 20 drives the threaded sleeve 21 to move back and forth.

[0037] In one embodiment, a driving assembly is also included, which includes a rotating shaft 30 rotatably arranged at the end of the workbench 10, a bevel gear 2 32 fixedly arranged on the screw rod 20 extending to the end outside the workbench 10, and a bevel gear 1 31 fixedly sleeved on the surface of the rotating shaft 30 and whose number and position match the bevel gear 2 32. When the motor drives the rotating shaft 30 to rotate, the power is transmitted through the meshing between the bevel gear 1 31 and the bevel gear 2 32, driving the screw rod 20 to rotate synchronously. Since the threaded sleeve 21 is threadedly matched with the screw rod 20 and is restricted in the empty groove 11 to move only axially, the rotational motion of the screw rod 20 is converted into a linear motion of the threaded sleeve 21, thereby driving the pushing assembly and the clamping assembly fixed thereto to reciprocate along the extension direction of the workbench 10. Since the two groups of bevel gears 1 are installed in opposite directions, the rotating shaft 30 is controlled to rotate forward and reverse, and the two groups of clamping assemblies realize synchronous reverse motion: when one group feeds forward, the other group retreats backward, thereby realizing an alternating cycle of continuous feeding.

[0038] In one embodiment, the pushing member includes a cylinder body 50 fixedly plugged into the frame 56, a moving rod 52 movably plugged into the end of the cylinder body 50, and a piston 51 fixedly arranged at one end of the moving rod 52 located inside the cylinder body 50. A section of the moving rod 52 located inside the cylinder body 50 is wound with a spring 54. The end of the moving rod 52 away from the piston 51 is fixedly connected to the clamping plate 53. When the cylinder body 40 of the pushing assembly is filled with compressed gas, the piston 51 is fixedly mounted on the moving rod 52. After the body is formed, the gas enters the cylinder body 50 of the pusher through the connecting pipe 55. The gas pushes the piston 51, overcomes the elastic force of the spring 54, and drives the moving rod 52 to move outward. The extension of the moving rod 52 drives the clamping plate 53 fixed thereto to move toward the pipe. Due to the synchronous action of the two sets of symmetrically arranged pushers, the clamping plates 53 move from both sides to the middle to clamp the pipe. After the clamping assembly clamps the pipe, it is driven by the moving assembly to move forward along the workbench 10 to perform feeding and cutting operations.

[0039] When the clamping assembly completes the feeding task, the gas in the second cylinder 50 is discharged through the outlet pipe 44, and the second spring 54 recovers its elastic force, pushing the second piston 51 and the second moving rod 52 to retract, driving the clamping plate 53 to release the pipe.

[0040] In one embodiment, the elastic force of the second spring 54 is greater than the elastic force of the first spring 43. Since the elastic force of the second spring 54 is greater, the resistance that needs to be overcome to push the second piston 51 is greater than that of the first piston 42. Therefore, at the initial stage of the compressed gas entering, the gas pressure is first used to overcome the elastic force of the first spring 43, and the first piston 42 drives the moving rod 1 41 to extend outward, and the frame 56 moves forward to a predetermined clamping position. When the first piston 42 completes the extension action, the gas continuously filled in the cylinder 1 40 enters the second cylinder 50 through the connecting pipe 55. At this time, the gas pressure gradually increases and begins to overcome the larger elastic force of the second spring 54. The second piston 51 is pushed, driving the second moving rod 52 to extend, and the clamping plate 53 connected to the end of the second moving rod 52 moves inward, finally clamping the pipe.

[0041] When a group of clamping components completes the feeding task, the solenoid valve of the air outlet pipe 44 is opened: the gas inside the cylinder body 1 40 and the cylinder body 2 50 is discharged. Since the spring 2 54 has a greater elastic force, its reset speed and force are also stronger. Therefore, during the exhaust process, the compressed gas in the cylinder body 2 50 flows in the opposite direction through the connecting pipe 55 into the cylinder body 1 40, and is discharged through the air outlet pipe 44, quickly pushing the piston 2 51 and the moving rod 2 52 to retract, and the clamping plate 53 is separated from the surface of the pipe to achieve rapid loosening. Then the gas in the cylinder body 1 40 continues to be discharged through the air outlet pipe 44, and the spring 1 43 pushes the piston 1 42 and the moving rod 1 41 to retract; the frame 56 then returns to its initial position, ready for the next clamping. Positioning first and then clamping during the inflation stage can effectively avoid clamping failure or damage to the workpiece caused by misalignment. Loosening first and then resetting during the exhaust stage can avoid scratches, wear or mechanical interference caused by the moving frame 56 in the clamped state.

[0042] In one embodiment, a V-shaped groove is provided at one end of the clamping plate 53 away from the movable rod 2 52. The V-shaped groove can adapt to round tubes of various diameters. When the tube is clamped, the V-shaped groove forms line contact or multi-point contact with the surface of the tube, thereby increasing friction, preventing the tube from slipping or deflecting during feeding, and improving processing accuracy. Due to the symmetrical structure of the V-shaped groove, the tube can be guided to automatically center during the clamping process, which helps to keep the axis of the tube consistent with the laser cutting path and avoid cutting deviation.

[0043] Example 2

[0044] A continuous feeding method for laser cutting of pipes, using the continuous feeding device for laser cutting of pipes described in Example 1, comprises the following steps:

[0045] S1 Feeding: Control the side moving assembly to drive it as a whole to move from the support plate 70 to the guide block 60, open the solenoid valve on the group of air inlet pipes 45, and introduce compressed gas into the group of cylinders 1 40. The compressed gas overcomes the elastic force of the spring 1 43, pushing the piston 1 42 and the moving rod 1 41 to extend, driving the frame 56 forward to the predetermined clamping position. The compressed gas continuously entering the cylinder 1 40 increases in pressure and is delivered to the pusher, driving the clamping plate 53 inward to clamp the pipe;

[0046] S2 reset: When the clamping assembly completes the feeding task, the moving assembly drives the entire assembly to move from the guide block 60 toward the support plate 70, opening the solenoid valve on the exhaust pipe 44. The gas inside the cylinder 1 40 and the pusher is discharged through the exhaust pipe 44. The clamping plate 53 releases the pipe. The elastic force of the spring 1 43 pushes the piston 1 42 and the moving rod 1 41 to retract, driving the frame 56 to return to the initial position.

[0047] S3: When the feeding group completes the feeding task, the group switches to the reset state and executes step S2. At the same time, the group that has completed the reset is switched to the feeding state and executes step S1. The two groups of clamping components alternately perform feeding and reset actions to achieve continuous feeding of pipes.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. Continuous feeding device for tube laser cutting, characterized in that: include: A workbench (10), wherein the workbench (10) is provided with empty slots (11) on both sides and along its extension direction, and the two ends of the workbench (10) are respectively provided with a support plate (70) and a guide block (60); Two groups of movable components are respectively arranged in the empty slots (11); A pushing assembly comprises a cylinder (40) fixedly arranged on the moving mechanism, a moving rod (41) movably arranged at the end of the cylinder (40), a piston (42) arranged at one end of the moving rod (41) located inside the cylinder (40), and a spring (43) wound around a section of the moving rod (41) located inside the cylinder (40), wherein an air inlet pipe (45) and an air outlet pipe (44) are respectively connected to the inside of the cylinder (40); A clamping assembly comprises a frame (56) fixedly arranged at the end of the moving rod (41), a pusher mounted on the top and bottom of the frame (56), and a clamping plate (53) fixedly arranged at the output end of the pusher, wherein the driving chamber of the pusher is connected to the cylinder (40) via a connecting pipe (55); wherein the two groups of moving components are controlled to drive the pushing components fixed thereto to move in opposite directions; when one group of moving components drives its pushing component to move from the support plate (70) to the guide block (60), the air inlet pipe (45) delivers compressed gas to the cylinder body (40) of the pushing component, pushing the piston (42) and the moving rod (41) to extend outward to overcome the elastic force of the spring (43), thereby driving the clamping component to extend; when the clamping component is extended, the compressed gas continuously entering the cylinder body (40) enters the driving chamber of the pushing member through the connecting pipe (55), drives the pushing member to move and pushes the clamping plates to move in directions close to each other, clamping the pipe and moving with the moving component; at the same time, the gas in the cylinder body (40) of the other group of pushing components is discharged from the air outlet pipe (44), causing the moving rod (41) of the pushing component of the group to retract under the action of the spring (43).

2. The continuous feeding device for tube laser cutting according to claim 1, characterized in that: The moving assembly includes a screw rod (20) rotatably inserted into the empty slot (11) and a threaded sleeve (21) threadedly sleeved on the surface of the screw rod (20), one end of the screw rod (20) passes through the workbench (10) and extends to the outside of the workbench (10), and the top fixed bracket of the threaded sleeve (21) is fixedly connected to the cylinder body (40).

3. The continuous feeding device for tube laser cutting according to claim 2, characterized in that: The invention also includes a driving assembly, which includes a rotating shaft (30) rotatably arranged at the end of the workbench (10), a second bevel gear (32) fixedly arranged on the screw rod (20) and extending to one end outside the workbench (10), and a first bevel gear (31) fixedly sleeved on the surface of the rotating shaft (30) and whose number and position match those of the second bevel gear (32).

4. The continuous feeding device for tube laser cutting according to claim 3, characterized in that: The pushing member includes a cylinder body 2 (50) fixedly plugged into the frame body (56), a moving rod 2 (52) movably plugged into the end of the cylinder body 2 (50), and a piston 2 (51) fixedly arranged on one end of the moving rod 2 (52) located inside the cylinder body 2 (50), a section of the moving rod 2 (52) located inside the cylinder body 2 (50) is wound with a spring 2 (54), and the end of the moving rod 2 (52) away from the piston 2 (51) is fixedly connected to the clamping plate (53).

5. The continuous feeding device for laser cutting of pipes according to claim 4, characterized in that: The elastic force of the second spring (54) is greater than the elastic force of the first spring (43).

6. The continuous feeding device for tube laser cutting according to claim 1, characterized in that: The clamping plate (53) is provided with a V-shaped groove at one end away from the second moving rod (52).

7. A continuous feeding method for laser cutting of pipes, comprising: The following steps are involved: S1 feeding: controlling the side moving assembly to drive the entire assembly to move from the support plate (70) to the guide block (60), opening the solenoid valve on the air inlet pipe (45), and introducing compressed gas into the cylinder body (40) of the group. The compressed gas overcomes the elastic force of the spring (43), pushes the piston (42) and the moving rod (41) to extend, and drives the frame (56) to move forward to the predetermined clamping position. The pressure of the compressed gas continuously entering the cylinder body (40) increases and is transported to the pusher, driving the clamping plate (53) to move inward and clamp the pipe; S2 reset: When the clamping assembly completes the feeding task, the moving assembly drives the entire assembly to move from the guide block (60) to the support plate (70), opens the solenoid valve on the exhaust pipe (44), and the internal gas of the cylinder body (40) and the pusher is discharged through the exhaust pipe (44). The clamping plate (53) releases the pipe, and the elastic force of the spring (43) pushes the piston (42) and the moving rod (41) to retract, driving the frame (56) to return to the initial position; S3: When the feeding group completes the feeding task, the group switches to the reset state and executes step S2. At the same time, the group that has completed the reset is switched to the feeding state and executes step S1. The two groups of clamping components alternately perform feeding and reset actions to achieve continuous feeding of pipes.

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