Full stroke three chuck pipe laser cutting machine and method

Abstract

The present application relates to the technical field of pipe cutting, and particularly relates to a full-stroke three-chuck pipe laser cutting machine and method, which comprises a rack having a feeding area, a machining area and a discharging area; a laser cutting main machine installed in the machining area; a clamping assembly comprising a feeding chuck, a displacement chuck and a pulling chuck; a supporting assembly comprising at least two floating feeding units arranged in the feeding area and at least two floating discharging units arranged in the discharging area, the floating feeding units and the floating discharging units synchronously float up and down along with the outer contour of the pipe to be machined and keep contact and support, and the floating feeding units are further provided with two lateral limiters which move to the center and are arranged on both sides of the pipe to be machined, and at least one of the limiters keeps contact and limit with the side of the pipe to be machined; the present application can reduce the sag and inertial swing of the overlength pipe during rotary cutting, and prevent the cutting precision from being reduced due to the pipe distortion.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe cutting, in particular to a full-stroke three-chuck pipe laser cutting machine and method. BACKGROUND

[0002] The laser pipe cutting machine is designed to cut metal steel pipes (including ordinary steel pipes and special-shaped steel pipes) with a certain thickness, has strong cutting capacity, and is mainly suitable for precise cutting of various metal pipe materials, such as carbon steel, stainless steel, alloy steel, etc.

[0003] With the increasing popularity and expansion of pipe applications, steel pipes need to be cut according to the length requirements of the use site. The existing laser pipe cutting machine clamps the pipe by a feeding chuck, continuously feeds the pipe to the laser cutting host, and continuously cuts off by the laser cutting host to complete the cutting of the pipe. In order to achieve the purpose of zero tail cutting, two chucks are usually needed to cooperate to complete the cutting work, and manual work is needed to assist in rotating and connecting materials, but for super-long pipes (length greater than 6m), rotation cutting will cause problems such as drooping and inertial material swinging, which are currently difficult to solve. SUMMARY

[0004] The purpose of the present application is to provide a full-stroke three-chuck pipe laser cutting machine and method to solve the problem of drooping and inertial material swinging when the existing cutting machine is used to rotate and cut super-long pipes. In order to achieve the above purpose, the present application solves the problem by the following technical scheme:

[0005] In the first aspect, the present application provides a full-stroke three-chuck pipe laser cutting machine, comprising:

[0006] A rack having a feeding area, a processing area and a discharging area;

[0007] A laser cutting host installed in the processing area, the laser head of which has a linkage displacement of Y-axis and Z-axis;

[0008] A clamping assembly including a feeding chuck moving in the feeding area, a displacement chuck moving in the processing area, and a pulling chuck moving in the discharging area;

[0009] A support assembly including at least two floating feeding units provided in the feeding area and at least two floating discharging units provided in the discharging area, the floating feeding units and the floating discharging units follow the outer contour of the pipe to be processed and synchronously float up and down while maintaining contact support, the floating feeding units are also provided with two centering moving lateral limiters, which are respectively arranged on both sides of the pipe to be processed, and at least one of the limiters maintains contact with the side of the pipe to be processed.

[0010] As a further technical solution, the floating upper feeding unit and the floating lower feeding unit can be floated to a position below the top end of the rack.

[0011] As a further technical solution, the floating upper feeding unit comprises a first transverse roller, which is floated up and down synchronously with the outer contour of the pipe to be processed and keeps contact and support.

[0012] As a further technical solution, the floating upper feeding unit further comprises a centering mechanism, the limiting member is a vertical roller, and the centering mechanism is used to convert the up-and-down movement into the approaching or moving-away movement of the two vertical rollers.

[0013] As a further technical solution, the vertical roller is floated synchronously with the first transverse roller.

[0014] As a further technical solution, the centering mechanism comprises two connecting rods, a transverse guide rail sliding block pair, two centering wheel seats installed on the transverse guide rail sliding block pair, a vertical guide rail sliding block pair, and a connecting seat installed on the vertical guide rail sliding block pair. One end of each of the two connecting rods is hingedly connected to the connecting seat, and the other end of each of the two connecting rods is hingedly connected to the centering wheel seat. The connecting seat is provided with a drive.

[0015] As a further technical solution, the floating lower feeding unit comprises a plurality of second transverse rollers, which are floated up and down synchronously with the outer contour of the pipe to be processed and keep contact and support.

[0016] As a further technical solution, the floating lower feeding unit further comprises a support and a support frame. The second transverse rollers are installed on the support frame. One side of the support frame is hingedly connected to the support and floated up and down with the support. The other side of the support frame is provided with a power device for driving the rotation thereof.

[0017] As a further technical solution, two guide rails and a rack are parallelly distributed on the rack. The feeding chuck, the displacement chuck, and the pulling chuck are driven by gear and rack engagement.

[0018] In a second aspect, the application provides a working method of the laser cutting machine according to the first aspect, which comprises the following steps:

[0019] The displacement chuck is moved to the rear side of the laser cutting main machine. The feeding chuck and the displacement chuck are used to clamp the pipe and process the front end of the pipe. The three chucks are used to clamp and process the middle part of the pipe. The displacement chuck is moved to the front side of the laser cutting main machine. The pulling chuck and the displacement chuck are used to process the tail of the pipe.

[0020] During the processing, the floating upper feeding unit and the floating lower feeding unit are floated up and down synchronously with the outer contour of the pipe to be processed and keep contact and support. At least one limiting member keeps contact and limits the side of the pipe to be processed.

[0021] The beneficial effects of the present application are as follows:

[0022] (1) The setting of the feeding chuck, the displacement chuck and the pulling chuck on the cutting machine body can control the deformation of the pipe to be cut, ensure the center line of the cutting head to coincide with the center of the pipe, ensure the machining precision, and is suitable for efficient cutting machining of the super-long pipe.

[0023] (2) The floating feeding unit and the floating discharging unit follow the synchronous up and down floating and keep contact support with the outer contour of the pipe to be machined, which can prevent the pipe to be machined from appearing downward deformation; the floating feeding unit is provided with two lateral limiting members for centering movement, which are respectively arranged on both sides of the pipe to be machined, and at least one limiting member keeps contact with the side of the pipe to be machined, which can reduce the lateral deformation of the pipe to be machined; through the supporting and limiting action of the floating unit, the sag and inertial swinging of the pipe to be cut during rotary cutting are reduced, and the cutting precision caused by pipe distortion is prevented.

[0024] (3) The displacement chuck moves to the rear side of the laser cutting main machine, the feeding chuck and the displacement chuck clamp the pipe at the same time, and the front end of the pipe is machined, the three chucks clamp the middle part of the pipe at the same time, the displacement chuck moves to the front side of the laser cutting main machine, and the tail of the pipe is machined by the pulling chuck and the displacement chuck; the three-chuck linkage technology can truly realize the rapid machining of the super-long workpiece and the zero tail cutting, greatly reducing the material waste and reducing the production and machining cost. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which form a part of this description, are included to provide further understanding of the application, and are incorporated in and constitute a part of this application. The schematic embodiments of the application and their descriptions are used to explain the application, and do not constitute a limitation of the application. It should also be understood that these drawings are shown for simplicity and clarity, and are not necessarily drawn to scale. The application will now be described and explained in additional features and details by using the accompanying drawings, in which:

[0026] Figure 1 The overall structure of the cutting machine in the embodiment of the application is shown;

[0027] Figure 2 The feeding machine frame structure in the embodiment of the application is shown;

[0028] Figure 3 The servo floating support unit structure in the embodiment of the application is shown;

[0029] Figure 4 The servo floating discharging unit structure in the embodiment of the application is shown.

[0030] In the diagram: 1. Feeding frame; 1.1. Frame cross brace; 1.2. First rack; 1.3. First linear guide slider pair; 1.4. Base; 2. Feeding chuck; 3. Floating feeding unit; 3.1. First servo motor; 3.2. Second linear guide slider pair; 3.3. Support seat; 3.4. Second rack; 3.5. First cylinder; 3.6. Vertical guide slider pair; 3.7. Connecting seat; 3.8. Connecting rod; 3.9. Centering wheel seat; 3.10. Vertical idler roller; 3. 11. Transverse guide rail slider pair; 3.12. First transverse idler roller; 4. Laser cutting host; 5. Positioning chuck; 6. Floating unloading unit; 6.1. Unloading support base; 6.2. Third linear guide rail slider pair; 6.3. Third rack; 6.4. Motor base; 6.5. Second servo motor; 6.6. Gear; 6.7. Second cylinder; 6.8. Support frame; 6.9. Hinge; 6.10. Second transverse idler roller; 7. Pulling chuck; 8. Pulling frame; 9. Control system. Detailed Implementation

[0031] The technical solutions in typical embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0032] Example 1

[0033] like Figures 1-4 As shown, this embodiment provides a full-stroke three-disc tube laser cutting machine, including:

[0034] The frame has a loading area, a processing area, and a unloading area;

[0035] The laser cutting host 4 is installed in the processing area, and its laser head has linkage displacement on the Y-axis and Z-axis;

[0036] The clamping assembly includes a feeding chuck 2 that moves in the loading area, a displacement chuck 5 that moves in the processing area, and a pulling chuck 7 that moves in the unloading area;

[0037] The support assembly includes at least two floating feeding units 3 located in the feeding area and at least two floating unloading units 6 located in the unloading area. The floating feeding units 3 and floating unloading units 6 float up and down synchronously with the outer contour of the pipe to be processed and maintain contact support. The floating feeding unit 3 is also provided with two lateral limiting members that move in a centered manner, which are respectively located on both sides of the pipe to be processed, and at least one limiting member maintains contact and limitation with the side of the pipe to be processed.

[0038] It also includes a control system 9, which is an automatic tracking bus system that enables network communication between multiple servo motors, resulting in faster motor response and capacitor tracking to ensure the distance between the cutting nozzle and the workpiece, reducing cutting defects caused by workpiece deformation.

[0039] It should be noted that the cutting machine in this embodiment can be used for cutting pipe materials and also for machining holes on the pipe materials.

[0040] As shown in Figure 1 and Figure 2 The rack includes a feeding rack 1 and a pulling rack 8, and the two racks are butted to form a whole rack, which is divided into three areas, and the butting part forms a machining area, and a laser cutting main machine 4 is installed in the area, and the two sides of the butting part are respectively a feeding area and a discharging area, and the movement areas of the three chucks jointly cover the length of the whole rack, i.e. full stroke movement.

[0041] The laser cutting main machine 4 is controlled by double modules, and can realize displacement of Y axis (lateral direction of the rack, perpendicular to the length direction of the rack) and Z axis (vertical direction of the rack), and a laser head is installed on the vertical module, and the laser head cuts the workpiece under the operation of the control system.

[0042] The displacement chuck 5 moves to the rear side of the laser cutting main machine 4, and the feeding chuck 2 and the displacement chuck 5 clamp the pipe material at the same time and process the front end of the pipe material, and the three chucks clamp the middle part of the pipe material at the same time and process the middle part of the pipe material, and the displacement chuck 5 moves to the front side of the laser cutting main machine 4, and the pulling chuck 7 and the displacement chuck 5 process the tail end of the pipe material; the three-chuck linkage technology can truly realize fast processing of the super-long workpiece and zero tail cutting, greatly reducing material waste and production and processing cost.

[0043] The feeding chuck 2, the displacement chuck 5 and the pulling chuck 7 on the main body of the cutting machine can control the deformation of the pipe material to be cut, ensure that the center line of the cutting head coincides with the center of the pipe material, and ensure the machining precision, and are suitable for efficient cutting and processing of the super-long pipe material.

[0044] The feeding chuck 2, the displacement chuck 5 and the pulling chuck 7 are all pneumatic chucks, and are internally provided with air cylinders, and can realize clamping and loosening through side air inlet, and can clamp all range of pipe fittings, and improve production efficiency.

[0045] Two guide rails and racks are parallelly distributed on the rack, and the feeding chuck 2, the displacement chuck 5 and the pulling chuck 7 are driven through gear and rack meshing. Specifically, the feeding rack includes rack cross braces 1.1, two first racks 1.2 and two first linear guide rail slider pairs 1.3, the feeding chuck 2, the displacement chuck 5 and the pulling chuck 7 are provided with gears driven in cooperation with the first racks 1.2, and are driven through gear and rack meshing. The feeding rack 1 and the pulling rack 8 are the same in structure.

[0046] The cutting machine includes at least two floating feeding units 3 arranged in the feeding area and at least two floating discharging units 6 arranged in the discharging area, and three floating feeding units 3 and three floating discharging units 6 are arranged in this embodiment.

[0047] The floating upper feeding unit 3 and the floating lower feeding unit 6 follow the outer contour of the pipe to be processed to synchronously float up and down and keep contact and support, so that the pipe to be processed can be prevented from being deformed downward; the floating upper feeding unit is provided with two lateral limiting members which move in the center and are arranged on the two sides of the pipe to be processed, and at least one limiting member keeps contact with the side of the pipe to be processed to limit, so that the pipe to be processed can be prevented from being deformed laterally; through the support and limiting action of the floating unit, the sag and inertial swinging of the pipe to be cut during the rotary cutting are reduced, and the cutting precision caused by the pipe distortion is prevented from being reduced.

[0048] It should be noted that the centering movement limiting member keeps contact with the two side edges of the pipe to be cut when limiting the regular special-shaped pipe (having a center of symmetry) and the ordinary round pipe, but for some pipes without the center of symmetry, one limiting member keeps contact with the distal side edge (the edge far away from the rotation axis).

[0049] In order not to affect the movement of the three chucks, the top of the floating upper feeding unit and the floating lower feeding unit can be floated to a position below the top of the rack, at this time, the chuck passes over the floating unit from above.

[0050] As shown in Figure 3 The floating upper feeding unit 3 includes a first lateral supporting roller 3.12 which synchronously floats up and down with the outer contour of the pipe to be processed and keeps contact and support, and the installation of the supporting roller can reduce the resistance of the workpiece feeding chuck when it is shifted to the laser cutting main machine during clamping.

[0051] The floating upper feeding unit 3 further includes a centering mechanism, and the limiting member is a vertical supporting roller 3.10, and the centering mechanism is used to convert the up-down movement into the approaching or moving away movement of the two vertical supporting rollers.

[0052] A first servo motor 3.1 is installed on the base 1.4, the first servo motor 3.1 is connected with a gear through a speed reducer, the gear is engaged with a second rack 3.4 to drive the second linear guide sliding block pair 3.2 installed on the supporting seat 3.3 to move, and the upper part of the supporting seat 3.3 is installed with the first lateral supporting roller 3.12.

[0053] The centering mechanism includes two connecting rods 3.8, a lateral guide sliding block pair 3.11, two centering wheel seats 3.9 installed thereon, a vertical guide sliding block pair 3.6 and a connecting seat 3.7 installed thereon, one end of the two connecting rods 3.8 is hinged to the connecting seat 3.9, and the other end is hinged to the corresponding centering wheel seat 3.9, and the connecting seat 3.7 is provided with a drive. The lateral guide sliding block pair 3.11 and the vertical guide sliding block pair 3.6 are installed on the back of the supporting seat 3.3, and the drive configured on the connecting seat 3.7 is a first air cylinder 3.5.

[0054] In the embodiment, the vertical supporting roller 3.10 synchronously floats with the first lateral supporting roller 3.12, and the synchronization of the two is kept.

[0055] As Figure 4 The floating unloading unit 6 includes a plurality of second transverse supporting rollers 6.10, which synchronously float up and down with the outer contour of the pipe to be processed and keep contact and support.

[0056] The floating unloading unit 6 further includes a support frame and a supporting frame 6.8, the second transverse supporting rollers 6.10 are installed on the supporting frame 6.8, one side of the supporting frame 6.8 is hinged to the support frame and synchronously floats up and down with the support frame, and the other side is provided with a power device for driving the rotation of the supporting frame 6.8.

[0057] Specifically, the unloading support base 6.1 is installed on the pulling frame 8, two third linear guide rail slider pairs 6.2 are parallelly distributed on the support frame and are slidably connected to the unloading support base 6.1 through the third linear guide rail slider pairs 6.2, a third rack 6.3 is installed on one side of the guide rail, a motor base 6.4 is connected to the unloading support base 6.1 through a welding plate, a second servo motor 6.5 is connected to a gear 6.6 through a speed reducer, the rotation of the second servo motor 6.5 is converted into linear motion through the gear and the rack, one end of a second air cylinder 6.7 is installed on the support frame, the other end of the second air cylinder 6.7 is connected to the supporting frame 6.8, a plurality of second transverse supporting rollers 6.10 are distributed on the supporting frame 6.8, the supporting frame 6.8 is supported through a hinge 6.9, and the second air cylinder 6.7 can make the supporting frame 6.8 overturn to the outside to achieve the purpose of cutting and unloading the pipe.

[0058] Embodiment 2

[0059] The embodiment provides a working method of the laser cutting machine according to the embodiment 1, and the working method comprises the following steps:

[0060] The displacement chuck 5 moves to the rear side of the laser cutting main machine 4, the feeding chuck 2 and the displacement chuck 5 simultaneously clamp the pipe and process the front end of the pipe, the three chucks simultaneously clamp and process the middle part of the pipe, the displacement chuck 5 moves to the front side of the laser cutting main machine, and the pulling chuck 7 and the displacement chuck 5 process the tail end of the pipe.

[0061] During the processing, the floating feeding unit 3 and the floating unloading unit 6 synchronously float up and down with the outer contour of the pipe to be processed and keep contact and support, and at least one limiting piece keeps contact and limiting with the side of the pipe to be processed.

[0062] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the present application by using the disclosed methods and technical contents without departing from the spirit and scope of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, which does not depart from the technical solutions of the present application, belongs to the protection scope of the technical solutions of the present application.

Claims

1. A full-stroke three-chuck pipe laser cutting machine, characterized in that, The application relates to a laser cutting machine for pipe, comprising the following parts: a rack with a feeding area, a processing area and a discharging area; a laser cutting main machine installed in the processing area, the laser head of which has linkage displacement of Y axis and Z axis; a clamping assembly comprising a feeding chuck moving in the feeding area, a displacement chuck moving in the processing area and a pulling chuck moving in the discharging area; a supporting assembly comprising at least two floating feeding units arranged in the feeding area and at least two floating discharging units arranged in the discharging area, the floating feeding units and the floating discharging units synchronously floating up and down along the outer contour of the pipe to be processed and keeping contact support, the floating feeding units being further provided with two lateral limiters moving in the center, which are arranged on the two sides of the pipe to be processed respectively, and at least one of the limiters keeping contact with the side of the pipe to be processed; the floating feeding unit comprises a first lateral supporting roller synchronously floating up and down along the outer contour of the pipe to be processed and keeping contact support; the floating feeding unit further comprises a centering mechanism, the limiter is a vertical supporting roller, and the centering mechanism is used for converting the up and down movement into the approaching or moving away movement of the two vertical supporting rollers; the vertical supporting roller synchronously floats with the first lateral supporting roller; the centering mechanism comprises two connecting rods, a lateral guide rail sliding block pair, two centering wheel seats installed on the lateral guide rail sliding block pair, a vertical guide rail sliding block pair and a connecting seat installed on the vertical guide rail sliding block pair, one end of the two connecting rods is hinged to the connecting seat, and the other end is hinged to the centering wheel seats respectively, and the connecting seat is provided with a drive; the floating discharging unit further comprises a support and a supporting frame, a second lateral supporting roller is installed on the supporting frame, one side of the supporting frame is hinged to the support and synchronously floats up and down with the support, and the other side is provided with a power device driving the rotation of the supporting frame; through the supporting and limiting actions of the floating units, the drooping and inertial swinging of the pipe to be cut during rotary cutting are reduced.

2. A full-stroke three-chuck pipe laser cutting machine according to claim 1, characterized in that, the top ends of the floating feeding units and the floating discharging units can be floated to positions below the top end of the rack.

3. A full-stroke three-chuck pipe laser cutting machine according to claim 1, characterized in that, the floating discharging unit comprises a plurality of second lateral supporting rollers synchronously floating up and down along the outer contour of the pipe to be processed and keeping contact support.

4. A full-stroke three-chuck pipe laser cutting machine according to claim 1, characterized in that, two guide rails and a rack are distributed in parallel on the rack, and the feeding chuck, the displacement chuck and the pulling chuck are driven through gear and rack engagement.

5. A method of operating a laser cutting machine as claimed in any one of claims 1 to 4, wherein, the application further discloses a method for processing the pipe by using the laser cutting machine. during the processing, the floating feeding units and the floating discharging units synchronously float up and down along the outer contour of the pipe to be processed and keep contact support, and at least one of the limiters keeps contact with the side of the pipe to be processed. ​

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