Laser pipe cutting method

Abstract

The invention relates to the field of pipe fitting machining machine tools, in particular to a laser pipe cutting method. According to the method, the laser pipe cutting assembly can be moved to the upstream position of the feeding chuck to machine the last section of pipe fitting unit firstly, so that a section of tailing does not need to be reserved at the tail end of the raw material pipe fitting for clamping, shorter tailing can be achieved, the utilization rate of the raw material pipe fitting is increased, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of pipe processing machine tools, and in particular to a laser pipe cutting method. Background Art

[0002] Metal pipes are a commonly used metal profile and are widely used in various fields of production and life. In order to facilitate material transportation, the raw material pipes for processing metal pipes generally use 2-6 meters long pipes. Therefore, when used, not only detailed processing but also cutting is required. The existing technology uses laser pipe cutting machines to cut pipes using laser technology. It irradiates the surface of the pipe with a high-energy-density laser beam, causing the pipe to heat up rapidly and melt and vaporize, thereby achieving precise cutting of the pipe. The laser pipe cutting machine has the advantages of high cutting accuracy, smooth incision, fast cutting speed, and small heat-affected zone. It can process pipes of various shapes and sizes.

[0003] With the continuous advancement of technology, new metal tube laser cutting machines can perform four-axis motion. For example, a laser tube cutting machine described in the Chinese utility model patent with the announcement number "CN213969533U" includes a frame, a three-axis movable bracket arranged on the frame, and a laser tube cutting assembly arranged on the three-axis movable bracket, and a tube clamping mechanism. The tube clamping mechanism can fix the tube and drive the tube to rotate. The laser tube cutting machine also includes a clamping mechanism. The clamping mechanism is arranged on the output path of the tube clamping mechanism and can realize lateral movement. The present invention sets a clamping mechanism on the output path of the tube clamping mechanism, and realizes the transfer of materials by grasping the materials through the clamping mechanism and moving in the lateral direction, thereby avoiding damage to the materials and improving the efficiency of material transmission.

[0004] However, the above solution still has the following problems: when cutting the last pipe unit from the raw pipe, a section of tail material is required to be left on the raw pipe for clamping by the pipe clamping mechanism, which will increase the waste of the raw pipe and reduce the utilization rate of the raw materials. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a laser tube cutting method, which can use the laser tube cutting assembly to move to the upstream position of the feed chuck to first process the last section of the pipe unit, so that there is no need to leave a section of tail material at the end of the raw pipe for clamping, which can achieve shorter tail material, increase the utilization rate of the raw pipe, and reduce costs.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] The laser tube cutting method is characterized by comprising the following steps:

[0008] Step 1: install the raw material pipe fitting on the laser pipe cutting machine, at least passing through the center of the feed chuck; at the same time, set the original length of the raw material pipe fitting and the length of the pipe fitting unit obtained after processing and cutting;

[0009] Step 2, intermittently conveying the raw pipe forward, each conveying distance is the length of a pipe unit; in the interval between two conveyings, at least the feed chuck clamps the pipe and drives the pipe to rotate, and the laser pipe cutting assembly processes and cuts the starting end of the raw pipe downstream of the feed chuck to obtain a pipe unit;

[0010] Step 3: When the end of the raw material pipe enters the moving path of the movable bracket, the movable bracket drives the laser pipe cutting assembly to move upstream in the feeding direction of the feeding chuck;

[0011] Step 4: Calculate based on the original length of the raw material pipe and the length of the pipe unit; if there is a waste section, the laser pipe cutting assembly cooperates with the feed chuck to cut off the waste at the end of the raw material pipe upstream of the feed chuck; when the waste section is cut off or there is no waste section after calculation, the laser pipe cutting assembly cooperates with the feed chuck to process the end of the raw material pipe upstream of the feed chuck;

[0012] Step five, the raw pipe fittings are continuously conveyed and processed until the laser pipe cutting assembly cooperates with the feed chuck to process and cut the penultimate pipe fitting unit on the raw pipe fittings to obtain the last two processed pipe fitting units.

[0013] The present invention adopts the above technical solution, which relates to a laser tube cutting method. The raw material tubes generally selected in the laser tube cutting method are of set lengths during processing. Of course, the parameters set in the system can also be adjusted based on the actual length of the raw material tubes. During the processing, the raw material tubes and the processed tubes can be intermittently transported first. The tube processing process includes using a laser tube cutting assembly to perform laser processing on the starting end of the raw material tube, such as drilling, and cutting off the processed tube unit.

[0014] Furthermore, after the end of the raw material pipe enters the moving path of the moving bracket, that is, when it is in the displacement formation of the laser tube cutting assembly, the end of the raw material pipe can be processed first with the laser tube cutting assembly. Specifically, it is calculated based on the original length of the raw material pipe and the length of the pipe unit. If there is a waste section, it is cut off first and then the tail pipe unit is laser processed; if there is no waste section, the tail pipe unit can be directly laser processed, but only the pipe is processed without cutting. Then, the raw material pipe is continuously conveyed forward for step-by-step processing until the penultimate pipe unit is processed. Here, the feed chuck can clamp the tail pipe unit to drive the remaining raw material pipe to rotate. Since the tail pipe unit has been processed in the previous work, the penultimate pipe unit is finally cut off to obtain the last two sections of processed pipe units.

[0015] To sum up, this solution can use the laser tube cutting assembly to move to the upstream position of the feed chuck to process the last section of the pipe unit first, so that there is no need to leave a section of tail material at the end of the raw pipe for clamping, which can achieve shorter tail material, increase the utilization rate of the raw pipe, and reduce costs.

[0016] In a specific implementation scheme, in step 3, when the length of the remaining raw material pipe extending upstream from the feed chuck is less than or equal to the length of one pipe unit, and the remaining length of the raw material pipe is at least greater than the length of one pipe unit, the movable bracket drives the laser pipe cutting assembly to move to the upstream of the feed chuck in the feeding direction. In other words, this scheme can only process the tail pipe unit before processing the penultimate pipe unit, so that the laser pipe cutting assembly is moved to the end of the raw material pipe when the remaining length of the raw material pipe is short, which can reduce the travel of the movable bracket and the length requirement of the overall frame.

[0017] Preferably, in step 2 and step 5, the raw material pipe is conveyed forward by the length of one pipe unit by: clamping the raw material pipe by a traction mechanism downstream of the feed chuck.

[0018] Preferably, in step 2 and step 5, the length of the raw pipe unit conveyed forward is as follows: a feed chuck is moved along the conveying direction of the raw pipe and is arranged on a frame, and a clamping assembly is arranged on the frame downstream of the feed chuck; the feed chuck and the clamping assembly alternately clamp the raw pipe, and the feed chuck reciprocates to drive the pipe to feed.

[0019] Preferably, the movable bracket includes a bracket main body movably arranged on the frame, and a radial moving pair movably arranged on the transverse moving pair on the bracket main body; the laser tube cutting assembly is arranged on the radial moving pair, the transverse moving pair drives the laser tube cutting assembly to move horizontally perpendicular to the pipe conveying direction, and the radial moving pair drives the laser tube cutting assembly to move vertically or obliquely perpendicular to the pipe conveying direction.

[0020] Preferably, a rotating pair is arranged on the lateral moving pair, and the rotating pair includes a swing arm rotatably arranged on the lateral moving pair; the radial moving pair is arranged on the swing arm of the rotating pair, and the laser cutting component can rotate with the swing arm relative to the axis point, and can move radially along the axis point relative to the swing arm under the side effect of radial movement.

[0021] Preferably, the laser tube cutting machine also includes an end chuck, which is located on a frame downstream of the feed direction of the feed chuck, and the center of the end chuck is axially opposite to the center of the feed chuck; in steps two, four and five, the feed chuck and the end chuck can clamp the pipe and rotate synchronously.

[0022] Preferably, a clamping mechanism is further provided on the frame upstream of the feed chuck in the feeding direction, and the moving path of the pipe passes through the center of the clamping mechanism; the clamping end of the clamping mechanism is used for rolling clamping and positioning the pipe.

[0023] Preferably, a mounting frame is provided on the frame upstream of the feed chuck in the feeding direction, and a through hole is provided on the mounting plate on the mounting frame, and the moving path of the pipe fitting passes through the through hole; the clamping mechanism includes two groups of clamping jaw assemblies respectively located on the end surfaces of both sides of the mounting plate; the two groups of clamping jaw assemblies respectively include clamping rollers located on the upper and lower sides and on the left and right sides of the through hole, and the clamping rollers located on the upper and lower sides and on the left and right sides of the through hole respectively clamp and position the pipe fitting.

[0024] Preferably, the clamping jaw assembly further comprises a driving component and a quadrilateral linkage component connected to the output end of the driving component; the two clamping rollers located on the upper and lower sides or the left and right sides of the through hole are located on the quadrilateral linkage component, and the driving component drives the two clamping rollers to move relatively closer or farther away through the quadrilateral linkage component;

[0025] The quadrilateral linkage assembly includes a transverse slide rail and a longitudinal slide rail arranged on a mounting plate at the edge of the through hole, a transverse slider arranged on the transverse slide rail, a longitudinal slider arranged on the longitudinal slide rail, and a connecting rod whose two ends are hinged to adjacent transverse sliders and longitudinal sliders; the output end of the driving component is connected to the transverse slider or the longitudinal slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a laser tube cutting machine.

[0027] Figure 2 The laser tube cutting machine has a hidden frame. Figure 1 .

[0028] Figure 3 The laser tube cutting machine has a hidden frame. Figure 2 .

[0029] Figure 4 It is a structural schematic diagram of the mobile bracket.

[0030] Figure 5 Schematic diagram of the feed chuck structure Figure 1 .

[0031] Figure 6 Schematic diagram of the feed chuck structure Figure 2 .

[0032] Figure 7 Schematic diagram of the structure of the end chuck and clamping assembly.

[0033] Figure 8 Schematic diagram of the structure of the clamping mechanism Figure 1 .

[0034] Fig. 9 Schematic diagram of the structure of the clamping mechanism Figure 2 . DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] This embodiment relates to a laser tube cutting method, which is applicable to a laser tube cutting machine 100 and includes the following steps:

[0041] Step 1: install the raw material pipe a on the laser pipe cutting machine 100, passing through at least the center of the feed chuck 4; and set the original length of the raw material pipe a and the length of the pipe unit obtained after processing and cutting;

[0042] Step 2: intermittently convey the raw material pipe a forward, and each conveying distance is the length of a pipe unit; in the interval between two conveyings, at least the feed chuck 4 clamps the raw material pipe a and drives the pipe to rotate, and the laser pipe cutting assembly 3 processes and cuts the starting end of the raw material pipe a downstream of the feed chuck 4 to obtain a pipe unit;

[0043] Step 3: When the end of the raw material tube a enters the moving path of the moving bracket 2, the moving bracket 2 drives the laser tube cutting assembly 3 to move to the upstream of the feeding direction of the feeding chuck 4;

[0044] Step 4: Calculate based on the original length of the raw material pipe a and the length of the pipe unit; if there is a waste section, the laser pipe cutting assembly 3 cooperates with the feed chuck 4 to cut off the waste at the end of the raw material pipe a upstream of the feed chuck 4; when the waste section is cut off or there is no waste section after calculation, the laser pipe cutting assembly 3 cooperates with the feed chuck 4 to process the end of the raw material pipe a upstream of the feed chuck 4;

[0045] Step five, the raw pipe a is continuously conveyed and processed until the laser pipe cutting assembly 3 cooperates with the feed chuck 4 to process and cut the penultimate pipe unit on the raw pipe a to obtain the last two completed pipe units.

[0046] The raw material pipe a generally selected in the laser pipe cutting method is of a set length. Of course, the parameters set in the system can also be adjusted based on the actual length of the raw material pipe a. During the processing, the raw material pipe a and the processed pipe can be intermittently transported first. The pipe processing process includes using the laser pipe cutting component 3 to laser process the beginning of the raw material pipe a, such as punching holes, and cutting off the processed pipe unit. Further, after the end of the raw material pipe a enters the moving path of the moving bracket 2, that is, when it is in the displacement formation of the laser pipe cutting component 3, the end of the raw material pipe a can be processed first with the laser pipe cutting component 3. Specifically, it is calculated based on the original length of the raw material pipe a and the length of the pipe unit. If there is a waste segment, it is cut off first and then the tail pipe unit is laser processed; if there is no waste segment, the tail pipe unit can be directly laser processed, but only the pipe is processed without cutting. Next, the raw pipe a is continuously conveyed forward for step-by-step processing until the penultimate pipe unit is processed. Here, the feed chuck 4 can clamp the tail pipe unit to drive the remaining raw pipe a to rotate. Since the tail pipe unit has been processed in the previous work, the penultimate pipe unit is finally cut off to obtain the last two sections of processed pipe units. In summary, this solution can use the laser tube cutting assembly 3 to move to the upstream position of the feed chuck 4 to process the last section of the pipe unit first. In this way, there is no need to leave a section of tail material at the end of the raw pipe a for clamping, which can achieve shorter tail material, increase the utilization rate of the raw pipe a, and reduce costs.

[0047] In a preferred specific embodiment, in step 3, when the length of the remaining raw material pipe a extending upstream from the feed chuck 4 is less than or equal to the length of one pipe unit, and the remaining length of the raw material pipe a is at least greater than the length of one pipe unit, the mobile bracket 2 drives the laser tube cutting assembly 3 to move to the upstream of the feed chuck 4 in the feeding direction. In other words, this solution can process the tail pipe unit only before processing the penultimate pipe unit, so that the laser tube cutting assembly 3 is moved to the end of the raw material pipe a when the remaining length of the raw material pipe a is short, which can reduce the travel of the mobile bracket 2 and the length requirement of the overall frame.

[0048] like Figures 1 to 9 As shown, this embodiment also provides a laser tube cutting machine 100 for implementing the above-mentioned laser tube cutting method, which is specifically as follows:

[0049] like Figures 1 to 9 The laser tube cutting machine 100 shown includes a frame 11, a mobile bracket 2 arranged on the frame 11, a laser tube cutting assembly 3 arranged on the mobile bracket 2, and a feed chuck 4 arranged on the moving path of the raw material tube a at the center of the disc. The mobile bracket 2 is arranged on the frame 11 along the conveying direction of the raw material tube a, and the feed chuck 4 can clamp the raw material tube a and drive the raw material tube a to rotate. The laser tube cutting assembly 3 in the laser tube cutting machine 100 is installed on the mobile bracket 2, and based on the mobile bracket 2 can move along the moving path of the raw material tube a on the frame 11, it is used to process different axial positions of the raw material tube a. When processing the raw material tube a, the feed chuck 4 clamps the raw material tube a and drives the raw material tube a to rotate, so that laser processing can be performed at any position in the axial direction, such as cutting a hole. After the tube is processed, the laser tube cutting assembly 3 can also be used to cut it from the raw material tube a. In this process, the feed chuck 4 needs to drive the raw material tube a to rotate one circle.

[0050] On this basis, the processing station of the feed chuck 4 in this scheme is set in the middle area of ​​the moving path of the feed chuck 4 corresponding to the moving bracket 2 on the frame 11, so that the moving bracket 2 can drive the laser tube cutting assembly 3 to move to the upstream and downstream of the feeding direction of the feed chuck 4. The processing station of the feed chuck 4 emphasized in the above scheme refers to the position when the feed chuck 4 clamps the raw material pipe a and drives it to rotate to cooperate with laser processing. The upstream and downstream recorded in the above scheme are based on the feeding direction of the raw material pipe a, and the feeding direction of the raw material pipe a is the process of transporting from upstream to downstream.

[0051] Based on this, in the normal pipe processing process as described above, the laser tube cutting assembly 3 can process the raw pipe a downstream of the feed chuck 4. The innovation of this case is that it can allow the laser tube cutting assembly 3 to move to the upstream position of the feed chuck 4. On the one hand, the end waste of the raw pipe a can be cut off, and on the other hand, the last section of the pipe unit can be laser processed first. The processing position of the above-mentioned end waste and pipe unit is calculated based on the original length of the raw pipe a and the length of the pipe unit. At this time, this part of the raw pipe a is outside the feed chuck 4, so it will not be interfered by the feed chuck 4 during processing. Then, the raw pipe a continues to be conveyed forward, and the laser tube cutting assembly 3 cooperates with the feed chuck 4 to process and cut the penultimate section of the pipe unit on the raw pipe a, and obtain the last two sections of the processed pipe unit.

[0052] In this way, the present solution can use the laser tube cutting assembly 3 to move to the upstream position of the feed chuck 4 to process the last section of the tube unit first, so that there is no need to leave a section of tail material at the end of the raw tube a for clamping, which can achieve a shorter tail material, increase the utilization rate of the raw tube a, and reduce costs.

[0053] exist Figure 2 and 4In the specific embodiment shown, the mobile bracket 2 includes a bracket body 21 movably arranged on the frame 11, a lateral moving pair 22 movably arranged on the bracket body 21, and a radial moving pair 23 arranged on the lateral moving pair 22. The laser tube cutting assembly 3 is arranged on the radial moving pair 23, the lateral moving pair 22 drives the laser tube cutting assembly 3 to move horizontally in a direction perpendicular to the conveying direction of the raw material tube a, and the radial moving pair 23 drives the laser tube cutting assembly 3 to move vertically or obliquely in a direction perpendicular to the conveying direction of the raw material tube a. In the scheme here, the bracket body 21 is constructed as a three-axis mobile bracket 2, first, the bracket body 21 can move relative to the frame 11 along the conveying direction of the raw material tube a. Second, the lateral moving pair 22 drives the laser tube cutting assembly 3 to move horizontally in a direction perpendicular to the conveying direction of the raw material tube a. Third, the radial moving pair 23 drives the laser tube cutting assembly 3 to move vertically or obliquely in a direction perpendicular to the conveying direction of the raw material tube a. In this way, the laser tube cutting assembly 3 can be allowed to perform laser processing on any position of the raw material tube a. In a further embodiment, a rotating pair 24 is provided on the transverse moving pair 22, and the rotating pair 24 includes a swing arm 241 rotatably provided on the transverse moving pair 22. The radial moving pair 23 is provided on the swing arm 241 of the rotating pair 24, and the laser cutting assembly can rotate relative to the axis point with the swing arm 241, and can move radially along the axis point relative to the swing arm 241 under the action of the radial moving pair 23. The transverse moving pair 22 of the laser cutting device is provided with a rotating pair 24, and the laser cutting assembly is provided on the swing arm 241, and the laser cutting assembly can rotate relative to the axis point with the swing arm 241. In this way, the rotation of the rotating pair 24 can be controlled, thereby adjusting the cutting angle of the laser cutting device, allowing the raw material pipe a to be beveled.

[0054] In one embodiment, a traction mechanism for pulling the raw material pipe a to move is provided on the frame 11 downstream of the feed chuck 4, and the traction mechanism includes a traction manipulator for clamping the raw material pipe a. The traction manipulator is arranged on the frame 11 along the conveying direction of the raw material pipe a. The scheme here can refer to the scheme of "CN213969533U", and a clamping claw mechanism is used to clamp the raw material pipe a at the rear side of the chuck for traction. Based on this scheme, in the steps 2 and 5, the length of the raw material pipe a conveyed forward by one pipe unit is specifically: the raw material pipe a is clamped by the traction mechanism downstream of the feed chuck 4.

[0055] exist Figures 1 to 3In another embodiment shown in FIG. 7, a clamping assembly 5 is provided on the frame 11 downstream of the feed chuck 4, and the clamping assembly 5 includes a group of clamping arms 51 for clamping the raw material pipe a. The feed chuck 4 is arranged on the frame 11 to move along the conveying direction of the raw material pipe a. The feed chuck 4 cooperates with the clamping assembly 5 to drive the feeding of the raw material pipe a. The movable bracket 2 can at least drive the laser tube cutting assembly 3 to move to the upstream and downstream of the feed chuck 4 in the processing station in the feeding direction. In the scheme here, the clamping assembly 5 is only used to clamp or loosen the raw material pipe a, and the feed chuck 4 is constructed to be movable. In this way, when the feed chuck 4 clamps the raw material pipe a and rotates for laser processing, the clamping assembly 5 loosens the raw material pipe a. Only when the feed chuck 4 retreats to the loading station, the clamping assembly 5 clamps the raw material pipe a to prevent the raw material pipe a from retreating synchronously, and then the feed chuck 4 clamps the raw material pipe a, the clamping assembly 5 releases the raw material pipe a, and the feed chuck 4 moves from the loading station to the processing station, so that the raw material pipe a is conveyed forward. Therefore, in step 2 and step 5 of the above-mentioned laser tube cutting method, the length of the raw material pipe a conveyed forward by one pipe unit is specifically: the feed chuck 4 is moved along the conveying direction of the raw material pipe a and is set on the frame 11, and the clamping assembly 5 is set on the frame 11 downstream of the feed chuck 4; the feed chuck 4 and the clamping assembly 5 alternately clamp the raw material pipe a, and the feed chuck 4 reciprocates to drive the pipe to feed.

[0056] Figure 5 and 6 In the specific embodiment shown, the feed chuck 4 is arranged on a mobile base 41, and the mobile base 41 is arranged on the frame 11 along the moving path of the raw material pipe a. A driving mechanism for driving the mobile base 41 to move relative to the frame 11 is arranged on the mobile base 41 or the frame 11. This scheme adopts a driving motor to drive the mobile base 41 to move, thereby driving the feed chuck 4 to move. In a further scheme, the driving mechanism is arranged on the mobile base 41, and the driving mechanism includes a driving motor 42, and a driving gear 43 connected to the output end of the driving motor 42. A rack 44 is arranged on the frame 11, and the driving gear 43 is meshed on the rack 44. The driving motor 42 drives the driving gear 43 to rotate through the reduction box, and since the driving gear 43 is meshed with the rack 44, the mobile base 41 is driven to move along the rack 44.

[0057] In addition, as shown in 1 to 3 and 7, the scheme also includes an end chuck 6, which is located on the frame 11 downstream of the feed chuck 4 in the feeding direction. The center of the disk body of the end chuck 6 is axially opposite to the center of the disk body of the feed chuck 4. The feed chuck 4 and the end chuck 6 can clamp the raw pipe a and rotate synchronously. The scheme here specifies that the feed chuck 4 and the end chuck 6 are used on the laser pipe cutting machine 100 to simultaneously position the raw pipe a. Compared with the single chuck scheme, this scheme has a higher axial positioning degree for the raw pipe a, can provide a more stable clamping effect, reduce the shaking and deformation of the pipe during the cutting process, thereby improving the cutting accuracy, and can more effectively maintain the stability of the pipe to avoid deviations and deformation during the cutting process. By adopting this scheme, in steps two, four and five of the above-mentioned laser tube cutting method, the end chuck 6 can be used to assist the feed chuck 4 to simultaneously clamp the raw tube a and drive the tube to rotate, and the laser tube cutting assembly 3 processes and cuts the starting end of the raw tube a between the feed chuck 4 and the end chuck 6 to obtain a tube unit.

[0058] like Figure 1 and 2As shown in Figures 8 and 9, a clamping mechanism 7 is also provided on the frame 11 upstream of the feed direction of the feed chuck 4, and the moving path of the raw material pipe a passes through the center of the clamping mechanism 7. The clamping end of the clamping mechanism 7 is used for rolling clamping and positioning the raw material pipe a. In the scheme here, at the feed end of the frame 11, since the clamping end of the clamping mechanism 7 is used for rolling clamping and positioning the raw material pipe a, the raw material pipe a can also be clamped and positioned during the feeding process of the raw material pipe a, so that the stability of the pipe can be more effectively maintained and deviation and deformation during the cutting process can be avoided. In a specific implementation scheme, a mounting frame 71 is provided on the frame 11 upstream of the feed direction of the feed chuck 4, and a through hole is provided on the mounting plate 72 on the mounting frame 71, and the moving path of the raw material pipe a passes through the through hole. The clamping mechanism 7 includes two groups of clamping assemblies 70 respectively located on the end faces on both sides of the mounting plate 72. The two groups of clamping jaw assemblies 70 respectively include clamping rollers 79 located on the upper and lower sides and the left and right sides of the through hole, and the clamping rollers 79 located on the upper and lower sides and the left and right sides of the through hole respectively clamp and position the raw material pipe a. In the scheme here, the two groups of clamping jaw assemblies 70 on the end faces of both sides of the mounting plate 72 respectively position the raw material pipe a from the upper and lower directions and the left and right directions, so that the raw material pipe a can be prevented from deforming to any side. The clamping jaw assembly 70 also includes a driving component 73, and a quadrilateral linkage component connected to the output end of the driving component 73. The two clamping rollers 79 located on the upper and lower sides or the left and right sides of the through hole are on the quadrilateral linkage component, and the driving component 73 drives the two clamping rollers 79 to move relatively close or away through the quadrilateral linkage component. In a specific solution, the quadrilateral linkage assembly includes a transverse slide rail 74 and a longitudinal slide rail 75 arranged on a mounting plate 72 at the edge of the through hole, a transverse slider 76 arranged on the transverse slide rail 74, a longitudinal slider 77 arranged on the longitudinal slide rail 75, and a connecting rod 78 whose two ends are hinged to adjacent transverse sliders 76 and longitudinal sliders 77. The output end of the driving component 73 is connected to the transverse slider 76 or the longitudinal slider 77. The above solution uses a quadrilateral linkage assembly to realize the synchronous operation of a group of relative clamping rollers 79 and realize the control of clamping and releasing.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0060] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. Laser tube cutting method, characterized in that: The steps include: Step 1: install the raw material pipe a on the laser pipe cutting machine (100) so that it passes through at least the center of the feed chuck (4); and simultaneously set the original length of the raw material pipe a and the length of the pipe unit obtained after processing and cutting; Step 2, intermittently conveying the raw material pipe a forward, each conveying distance being the length of a pipe unit; in the interval between two conveyings, at least the feed chuck (4) clamps the raw material pipe a and drives the pipe to rotate, and the laser pipe cutting assembly (3) processes and cuts the starting end of the raw material pipe a downstream of the feed chuck (4) to obtain a pipe unit; Step three, when the end of the raw material pipe a enters the moving path of the movable bracket (2), the movable bracket (2) drives the laser pipe cutting assembly (3) to move upstream in the feeding direction of the feeding chuck (4); Step 4: Calculate based on the original length of the raw material pipe a and the length of the pipe unit; if there is a waste section, the laser pipe cutting assembly (3) cooperates with the feed chuck (4) to cut off the waste at the end of the raw material pipe a upstream of the feed chuck (4); when the waste section is cut off or there is no waste section after calculation, the laser pipe cutting assembly (3) cooperates with the feed chuck (4) to process the end of the raw material pipe a upstream of the feed chuck (4); Step 5, the raw material pipe a is continuously conveyed and processed until the laser pipe cutting assembly (3) cooperates with the feed chuck (4) to process and cut the penultimate pipe unit on the raw material pipe a, thereby obtaining the last two pipe units that have been processed.

2. The laser tube cutting method according to claim 1, characterized in that: In step three, when the length of the remaining raw material pipe a extending upstream from the feed chuck (4) is less than or equal to the length of one pipe unit, and the length of the remaining raw material pipe a is at least greater than the length of one pipe unit, the movable bracket (2) drives the laser pipe cutting assembly (3) to move upstream in the feed direction of the feed chuck (4).

3. The laser tube cutting method according to claim 1, characterized in that: In the step 2 and the step 5, the raw material pipe a is conveyed forward by the length of one pipe unit by: the raw material pipe a is clamped by the traction mechanism downstream of the feed chuck (4).

4. The laser tube cutting method according to claim 1, characterized in that: In the step 2 and the step 5, the raw material pipe a is conveyed forward by the length of one pipe unit as follows: a feed chuck (4) is arranged on a frame (11) in a movable manner along the conveying direction of the raw material pipe a, and a clamping assembly (5) is arranged on the frame (11) downstream of the feed chuck (4); the feed chuck (4) and the clamping assembly (5) clamp the raw material pipe a alternately, and the feed chuck (4) drives the pipe to be fed by reciprocating motion.

5. The laser tube cutting method according to claim 1, characterized in that: The movable bracket (2) comprises a bracket body (21) movably arranged on the frame (11), a transverse movable pair (22) movably arranged on the bracket body (21), and a radial movable pair (23) arranged on the transverse movable pair (22); the laser tube cutting assembly (3) is arranged on the radial movable pair (23), the transverse movable pair (22) drives the laser tube cutting assembly (3) to move horizontally in a direction perpendicular to the tube conveying direction, and the radial movable pair (23) drives the laser tube cutting assembly (3) to move vertically or in an inclined direction perpendicular to the tube conveying direction.

6. The laser tube cutting method according to claim 5, characterized in that: The lateral moving pair (22) is provided with a rotating pair (24), and the rotating pair (24) comprises a swing arm (241) rotatably arranged on the lateral moving pair (22); the radial moving pair (23) is arranged on the swing arm (241) of the rotating pair (24), and the laser cutting component can rotate with the swing arm (241) relative to the axis point, and can move radially relative to the swing arm (241) along the axis point under the action of the radial moving pair (23).

7. The laser tube cutting method according to claim 2, characterized in that: The laser tube cutting machine (100) further comprises an end chuck (6), which is located on a frame (11) downstream of the feed chuck (4) in the feeding direction, and the center of the end chuck (6) is axially opposite to the center of the feed chuck (4); in steps two, four and five, the feed chuck (4) and the end chuck (6) can clamp the tube and rotate synchronously.

8. The laser tube cutting method according to claim 1, characterized in that: A clamping mechanism (7) is also provided on the frame (11) upstream of the feed chuck (4) in the feeding direction, and the pipe moving path passes through the center of the clamping mechanism (7); the clamping end of the clamping mechanism (7) is used for rolling clamping and positioning the pipe.

9. The laser tube cutting method according to claim 8, characterized in that: A mounting frame (71) is provided on the frame (11) upstream of the feed chuck (4) in the feeding direction, and a through hole is provided on the mounting plate (72) on the mounting frame (71), and a moving path of the pipe fitting passes through the through hole; the clamping mechanism (7) comprises two groups of clamping jaw assemblies (70) respectively located on the end surfaces of both sides of the mounting plate (72); the two groups of clamping jaw assemblies (70) respectively comprise clamping rollers (79) located on the upper and lower sides and the left and right sides of the through hole, and the clamping rollers (79) located on the upper and lower sides and the left and right sides of the through hole respectively clamp and position the pipe fitting.

10. The laser tube cutting method according to claim 9, characterized in that: The clamping jaw assembly (70) further comprises a driving component (73) and a quadrilateral linkage assembly connected to an output end of the driving component (73); two clamping rollers (79) located on the upper and lower sides or the left and right sides of the through hole are located on the quadrilateral linkage assembly, and the driving component (73) drives the two clamping rollers (79) to move relatively closer or farther away through the quadrilateral linkage assembly; The quadrilateral linkage assembly comprises a transverse slide rail (74) and a longitudinal slide rail (75) arranged on a mounting plate (72) at the edge of the through hole, a transverse slider (76) arranged on the transverse slide rail (74), a longitudinal slider (77) arranged on the longitudinal slide rail (75), and a connecting rod (78) with two ends hinged to adjacent transverse sliders (76) and longitudinal sliders (77); the output end of the driving component (73) is connected to the transverse slider (76) or the longitudinal slider (77).

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