CN114043102B - Pipe cutting method of four-chuck laser pipe cutting machine - Google Patents
Pipe cutting method of four-chuck laser pipe cutting machine Download PDFInfo
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- CN114043102B CN114043102B CN202210036679.4A CN202210036679A CN114043102B CN 114043102 B CN114043102 B CN 114043102B CN 202210036679 A CN202210036679 A CN 202210036679A CN 114043102 B CN114043102 B CN 114043102B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Abstract
The invention provides a pipe cutting method of a four-chuck laser pipe cutting machine, which belongs to the field of pipe cutting and comprises the four-chuck laser pipe cutting machine, wherein a machine body is arranged on the four-chuck laser pipe cutting machine, a laser head assembly is arranged on the machine body, and a first chuck, a second chuck, a third chuck and a fourth chuck are sequentially arranged on the machine body; a feeding assembly and a discharging assembly are respectively arranged on two sides of the second chuck; a material length detection device is arranged on the first chuck and/or the second chuck; according to the invention, the total material length of the pipe can be measured by the arranged material length detection device, and the chuck clamping scheme and the cutting scheme are flexibly selected according to the total material length of the pipe, so that zero-tailing cutting and feeding and discharging of any length of the pipe are realized.
Description
Technical Field
The invention belongs to the field of pipe cutting, and particularly relates to a pipe cutting method of a four-chuck laser pipe cutting machine.
Background
In the prior art, in the traditional cutting method of the two-chuck laser pipe cutting machine, the cutting head is moved to the middle of the front chuck and the rear chuck, and then the pipe is independently clamped by the rear chuck for cutting, so that the length of the tailing is shortened as much as possible. However, because the pipe cutting method of the existing laser pipe cutting machine adopts single chuck clamping, the cutting precision is poor in the pipe processing process, especially when heavy pipes or large-diameter pipes are clamped, a section of clamping part on the pipe cannot be cut all the time, and the cutting mode also has the defect of inconvenient blanking.
Disclosure of Invention
The invention aims to provide and design a pipe cutting method of a four-chuck laser pipe cutting machine aiming at the defect of inconvenient blanking in the conventional pipe cutting method, so as to solve the technical problems and realize the feeding, the blanking and the cutting of pipes with any length in the pipe cutting process.
In order to achieve the purpose, the invention provides the following technical scheme: a pipe cutting method of a four-chuck laser pipe cutting machine comprises the four-chuck laser pipe cutting machine, wherein a lathe bed is arranged on the four-chuck laser pipe cutting machine, a laser head assembly is arranged on the lathe bed, and a first chuck, a second chuck, a third chuck and a fourth chuck are sequentially arranged on the lathe bed; the second chuck is fixed on the lathe bed, the laser head assembly is arranged above the second chuck, and the first chuck, the third chuck and the fourth chuck are movably arranged on the lathe bed; a feeding assembly is arranged on one side, close to the first chuck, of the second chuck, a discharging assembly is arranged on one side, close to the fourth chuck, of the second chuck, and a finished product trolley used for containing cut finished products is arranged below the laser head assembly; the first chuck and/or the second chuck is/are provided with a material length detection device for detecting the length of the pipe;
the pipe cutting method mainly comprises the following steps:
the method comprises the following steps that firstly, a feeding assembly feeds a first chuck, and a pipe to be cut is clamped through the first chuck; the length L of the pipe to be cut is obtained by measuring the length of the pipe to be cut through the material length detection device in the clamping process, the length L of the pipe to be cut is compared with the minimum pipe length L1 which can be simultaneously clamped by the first chuck and the second chuck and can be cut by the laser head assembly, and if L is less than L1, the pipe to be cut can not be cut at the end, far away from the first chuck, of the pipe to be cut along the direction from the fourth chuck to the first chuck; if L is larger than or equal to L1, cutting the pipe to be cut along the direction from the fourth chuck to the first chuck at one end far away from the first chuck, and entering the second step after the pipe to be cut is subjected to the cutting;
step two, comparing the material length LC of a finished product material obtained after the pipe to be cut is cut with the maximum finished product material length L3 which can be contained in a finished product skip car, and if LC is less than or equal to L3, entering step three; if LC > L3, go to step four;
step three, the first chuck and the second chuck clamp the residual part of the pipe to be cut after cutting, the third chuck and the fourth chuck do not clamp finished products, and the finished products directly fall into a finished product skip car below;
and fourthly, clamping the rest part of the pipe to be cut after cutting by the first chuck and the second chuck, clamping the finished material by the third chuck, moving the finished material to the upper part of the blanking assembly to enable the blanking assembly to support the finished material, loosening the finished material by the third chuck, moving the finished material to the blanking assembly from the third chuck, and enabling the blanking assembly to realize blanking action.
Further, in the fourth step, the length LC of the finished product is compared with the maximum length L4 of the finished product which can be clamped in the maximum movement range of the third chuck, if LC > L4, the third chuck clamps the finished product and moves towards the direction close to the second chuck, and the finished product is discharged onto the discharging assembly from the position between the third chuck and the fourth chuck; and if LC is less than or equal to L4, the third chuck clamps the finished product to move towards the direction close to the fourth chuck, and the finished product is discharged to the discharging assembly from the position between the third chuck and the second chuck. In the blanking process, the position of the blanking assembly does not need to be changed, and the finished product material only needs to be moved to the position above the blanking assembly through the third chuck, so that the blanking of the finished product material with any length can be realized.
Furthermore, when the finished product material is clamped, the third chuck independently clamps the finished product material, or the third chuck and the fourth chuck simultaneously clamp the finished product material, so that the third chuck is prevented from deforming due to the fact that the finished product material is too heavy.
Further, the pipe cutting method provided by the invention further comprises a fifth step, wherein the fifth step is as follows: calculating the length of the residual material after the pipe to be cut is cut to obtain the length LY of the residual pipe, comparing the length LY of the residual pipe with L1, and if the length LY is less than L1, continuing to cut the pipe to be cut from the fourth chuck to the first chuck at one end far away from the first chuck; if LY is more than or equal to L1, the cutting from the fourth chuck to the first chuck can be continuously carried out on one end of the pipe to be cut away from the first chuck, and the step two is carried out after the cutting, and the second cutting, the third cutting and the like are carried out on the pipe to be cut.
Furthermore, after the end, far away from the first chuck, of the pipe to be cut is not cut from the fourth chuck to the first chuck, the length L0 of the remaining part of the pipe to be cut is calculated, the length L0 of the minimum pipe, which can be clamped by the first chuck, the second chuck, the third chuck and the fourth chuck at the same time, is L2, if L0 is not less than L2, the pipe to be cut is subjected to zero-tailing cutting, the first chuck, the second chuck, the third chuck and the fourth chuck clamp the pipe to be cut at the same time, then the clamping jaws of the first chuck and the second chuck are opened, only the clamping jaws of the third chuck and the fourth chuck clamp the pipe to be cut and move in the direction far away from the laser head assembly, the whole pipe to be cut is cut in the moving process, and the zero-tailing cutting of the pipe is realized.
Further, the feeding in the step one comprises the following specific steps: placing the pipe to be cut on a feeding conveyer belt, and driving the pipe to be cut to move towards the direction close to the lathe bed by the feeding conveyer belt until the pipe to be cut is positioned at the output end of the feeding conveyer belt; then the material loading bearing roller frame will treat that cut tubular product takes off from the conveyer belt through lifting action, then will treat that cut tubular product removes to between first chuck and the second chuck to guarantee that the axis of treating the cut tubular product is the same straight line with the axis of first chuck, first chuck carries out the centre gripping action to treating the cut tubular product afterwards, thereby realizes the material loading of arbitrary length tubular product.
Furthermore, the material length detection device comprises a first length detection switch and a second length detection switch, the first length detection switch is arranged at one end, close to the second chuck, of the first chuck, the second length detection switch is arranged at one end, close to the first chuck, of the second chuck, the first length detection switch and the second length detection switch are used for judging whether the first chuck and the second chuck are provided with pipes or not respectively, so that the pipes to be cut are detected and calculated in length, and the follow-up action sequence of the four chucks is determined conveniently.
Specifically, the method for measuring the length of the pipe to be cut by the material length detection device in the first step comprises the following steps: after the feeding assembly conveys the pipe to be cut to a position between the first chuck and the second chuck, the first chuck moves towards the direction close to the second chuck until the first length detection switch detects the pipe to be cut and stops moving, the current coordinate of the first chuck is recorded as x1 at the moment, the first chuck travels forwards for a distance a to reach a position where the pipe to be cut can be stably clamped, the current coordinate of the first chuck is recorded as x4 at the moment, and the first chuck continues to travel forwards after clamping the pipe to be cut; a second material length detection switch on the second chuck stops after detecting the existence of the material; recording the current coordinate of the first chuck as x2 and the coordinate of a second length detection switch on the second chuck as x 3; the total length of the pipe is L = | x3-x2| + a, where a = | x4-x1 |.
Further, be provided with chasing bar on the laser head subassembly, chasing bar can treat at tubular product cutting process's arbitrary moment and cut tubular product and bore or reaming or tapping.
Further, the tapping device comprises a mounting seat, and at least one tap cutter is arranged on the mounting seat; the mounting seat is also provided with a tool changing mechanism, and the tool changing mechanism can drive the mounting seat to rotate and transfer a screw tap tool to be used to a working station; still be provided with cutter rotary mechanism and at least a set of cutter telescopic machanism on the mount pad, cutter rotary mechanism can drive the screw tap cutter self and rotate, cutter telescopic machanism can drive rotatory screw tap cutter up-and-down motion alone and carry out the tapping operation to make the screw tap cutter resume the normal position after the tapping operation is accomplished.
Further, the tapping process of the tapping device mainly comprises the following steps:
step 1, a tool changing mechanism works, and a screw tap tool to be used is rotated to a working position;
step 3, enabling the screw tap cutters of all stations to rotate according to the rotating speed required by the tapping process through a cutter rotating mechanism;
step 4, the whole tapping device taps downwards and taps the pipe;
and 5, finishing tapping, and returning each part to the initial position.
According to the technical scheme, the invention has the following advantages: firstly, in practical application, the pipe cutting method of the four-chuck laser pipe cutting machine provided by the invention firstly measures the length of the pipe to be cut, and can select a proper cutting scheme according to the length of the pipe to be cut, so that the pipe cutting method is suitable for pipes with various lengths; secondly, the pipe cutting method divides the finished products generated after the pipe is cut according to the material length of the finished products, and different blanking modes are set for the finished products with different lengths, so that ordered blanking of the finished products is guaranteed, and the blanking of the finished products with any length can be rapidly and tidily realized.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a schematic view of the working principle of the feeding assembly and the blanking assembly.
Fig. 4 is a schematic diagram of only the first chuck and the second chuck clamping the length of the tube and the blanking length.
Fig. 5 is a schematic view of the shortest material length when four chucks are simultaneously clamping.
Fig. 6 is a schematic diagram of zero heel cut.
Fig. 7 is a first schematic structural diagram of the tapping device.
Fig. 8 is a schematic structural diagram of a tapping device.
In the figure: 1. the automatic tapping machine comprises a first chuck, 2, a second chuck, 3, a third chuck, 4, a fourth chuck, 5, a lathe bed, 6, a laser head assembly, 7, a finished product skip, 8, a feeding roller frame, 9, a feeding conveying belt, 10, a feeding assembly, 11, a tapping device, 12, a discharging assembly, 13, a discharging conveying belt, 14, a discharging roller frame, 15, a cutter telescoping mechanism, 16, a cutter rotating mechanism, 17, a tap cutter, 18, a cutter changing mechanism, 19, a pipe, 20, an electric push rod, 21, a tapping motor, 22, a second planetary reducer, 23, a second tapping gear, 24, a first tapping gear, 25, a fixed seat, 26, a spring, 27, a large gear, 28, a third tapping gear, 29, a spline shaft, 30, a spline sleeve gear, 31, a mounting seat, 32, a pinion, 33, a first planetary reducer, 34 and a cutter changing motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 8, the invention provides a pipe cutting method of a four-chuck laser pipe cutting machine, which includes a four-chuck laser pipe cutting machine, wherein a machine body 5 is arranged on the four-chuck laser pipe cutting machine, a laser head assembly 6 is arranged on the machine body 5, a first chuck 1, a second chuck 2, a third chuck 3 and a fourth chuck 4 are further sequentially arranged on the machine body 5, and centers of the first chuck 1, the second chuck 2, the third chuck 3 and the fourth chuck 4 are always kept at a consistent height; the second chuck 2 is fixed on the lathe bed 5, the laser head assembly 6 is arranged above the second chuck 2, and the laser head assembly 6 can move along the vertical direction and the horizontal direction vertical to the length direction of the lathe bed; the first chuck 1, the third chuck 3 and the fourth chuck 4 are movably arranged on the lathe bed 5; a feeding assembly 10 is arranged on one side, close to the first chuck 1, of the second chuck 2, a discharging assembly 12 is arranged on one side, close to the fourth chuck 4, of the second chuck 2, and a finished product skip 7 used for containing cut finished products is arranged below the laser head assembly 6; and a material length detection device for detecting the length of the pipe is arranged on the first chuck 1 and/or the second chuck 2.
The pipe cutting method mainly comprises the following steps:
the method comprises the following steps that firstly, a feeding assembly 10 feeds a first chuck 1, and clamps a pipe to be cut through the first chuck 1; the length of the pipe to be cut is measured through the material length detection device in the clamping process, the length L of the pipe to be cut is obtained, the length L of the pipe to be cut is compared with the minimum pipe length L1 which can be clamped by the first chuck 1 and the second chuck 2 simultaneously and can be cut by the laser head assembly 6, if L is less than L1, the pipe to be cut cannot be cut at one end, far away from the first chuck 1, of the pipe to be cut along the direction from the fourth chuck 4 to the first chuck 1, namely conventional cutting cannot be carried out; if L is larger than or equal to L1, cutting the pipe to be cut along the direction from the fourth chuck 4 to the first chuck 1 at one end of the pipe to be cut, which is far away from the first chuck 1, namely the pipe to be cut can be cut conventionally, and the pipe to be cut enters the second step after being cut conventionally;
step two, comparing the material length LC of a finished product material obtained after the pipe to be cut is cut with the maximum finished product material length L3 which can be contained in a finished product skip car 7, and if LC is less than or equal to L3, entering step three; if LC > L3, go to step four;
step three, the first chuck 1 and the second chuck 2 clamp the residual part of the pipe to be cut after cutting, the third chuck 3 and the fourth chuck 4 do not clamp the finished product, and the finished product directly falls into a finished product skip 7 below;
step four, the first chuck 1 and the second chuck 2 clamp the residual part of the pipe to be cut after cutting, the third chuck 3 clamps the finished product material, the finished product material is moved to the upper part of the blanking assembly 12, the blanking assembly 12 supports the finished product material, then the third chuck 3 loosens the finished product material, the finished product material is moved to the blanking assembly 12 from the third chuck 3, and the blanking assembly 12 realizes the blanking action;
step five, calculating the residual material length after the pipe to be cut is cut to obtain the length LY of the residual pipe, comparing the length LY of the residual pipe with L1, and if the length LY is less than L1, the conventional cutting cannot be continuously carried out; if LY is more than or equal to L1, the conventional cutting can be continued, and the step two is carried out after the conventional cutting.
Specifically, the feeding in the first step specifically comprises the following steps: the pipe to be cut is placed on the feeding conveyer belt 9, the feeding conveyer belt 9 drives the pipe to be cut to move towards the direction close to the lathe bed 5 until the pipe to be cut is positioned at the output end of the feeding conveyer belt 9; at this moment, material loading bearing roller frame 8 will treat to cut tubular product and take off from material loading conveyer belt 9 through the lift action, then will treat to cut tubular product and remove to between first chuck 1 and the second chuck 2 to guarantee that the axis of treating to cut tubular product and the axis of first chuck 1 are the collinear, first chuck 1 is treated to cut tubular product afterwards and is carried out the centre gripping action.
Further, it is preferable that the first chuck 1 performs a clamping operation on the pipe to be cut and also performs a length measurement on the pipe to be cut. Specifically, the material length detection device includes first length detection switch and second length detection switch, first length detection switch sets up the one end that is close to second chuck 2 on first chuck 1, second length detection switch sets up the one end that is close to first chuck 1 on second chuck 2, first length detection switch and second length detection switch are used for judging respectively that first chuck 1 department and second chuck 2 department have tubular product. On the basis of the material length detection device, the method for measuring the length of the pipe to be cut by the material length detection device comprises the following steps: after the feeding assembly 10 conveys the pipe to be cut to a position between the first chuck 1 and the second chuck 2, the first chuck 1 moves towards the direction close to the second chuck 2 until the first length detection switch stops moving after detecting the pipe to be cut, the current coordinate of the first chuck 1 is recorded as x1, the first chuck 1 moves forwards by a distance a to reach a position where the pipe to be cut can be stably clamped, the current coordinate of the first chuck 1 is recorded as x4, and the first chuck 1 continues to move forwards after clamping the pipe to be cut; a second material length detection switch on the second chuck 2 stops after detecting the existence of the material; recording the current coordinate of the first chuck 1 as x2 and the coordinate of the second length detection switch on the second chuck 2 as x 3; the total length of the pipe is L = | x3-x2| + a, where a = | x4-x1 |.
In the fourth step, comparing the length LC of the finished product with the maximum length L4 of the finished product which can be held in the maximum moving range of the third chuck 3, if LC > L4, the third chuck 3 holds the finished product and moves towards the direction close to the second chuck 2, and the finished product is dropped onto the blanking assembly 12 from the position between the third chuck 3 and the fourth chuck 4; if LC is less than or equal to L4, the third chuck 3 clamps the finished product and moves towards the direction close to the fourth chuck 4, and the finished product is dropped to the blanking assembly 12 from the position between the third chuck 3 and the second chuck 2. In addition, when the finished product material is clamped, the finished product material can be clamped only by the third chuck 3 alone, and can also be clamped by the third chuck 3 and the fourth chuck 4 together.
Further, as shown in fig. 3, the structure of the blanking assembly 12 related in the fourth step preferably includes a blanking conveyor belt 13 and a blanking roller frame 14, in the blanking process of the blanking assembly 12, the blanking roller frame 14 follows the rotation of the finished product to perform servo following, then supports the finished product after the finished product is cut, conveys the finished product to the blanking conveyor belt 13 on the blanking side, and conveys the finished product outwards through the blanking conveyor belt 13 so as to take the finished product.
In addition, in the pipe cutting method of the four-chuck laser pipe cutting machine provided by the invention, after one end of the pipe to be cut, which is far away from the first chuck 1, is not cut from the fourth chuck 4 to the first chuck 1, the material length L0 of the rest part of the pipe to be cut is calculated, L0 is compared with the minimum pipe length L2 which can be clamped by the first chuck 1, the second chuck 2, the third chuck 3 and the fourth chuck 4 at the same time, if L0 is larger than or equal to L2, zero tailing cutting is carried out on one end of the pipe to be cut, which is close to the first chuck 1, the pipe to be cut is clamped by the first chuck 1, the second chuck 2, the third chuck 3 and the fourth chuck 4 at the same time, then the chucks of the first chuck 1 and the second chuck 2 are opened, only the jaws 3 and the fourth chuck 4 are clamped and move to the direction far away from the laser head assembly 6, the whole pipe to be cut is cut in the moving process, and the blanking mode of the finished product after zero tailing cutting is the same as the blanking mode of the finished product in conventional cutting in principle.
In addition, as preferred, be provided with chasing bar 11 on the laser head subassembly 6 to through chasing bar 11 is treated the cutting tubular product at the arbitrary moment of tubular product cutting in-process and is drilled or reaming or tapping, its application field that can widen this tubular product cutting method of four chuck laser pipe cutting machines simultaneously.
Specifically, the tapping device 11 comprises a fixed seat 25 and a mounting seat 31, wherein the fixed seat 25 is arranged above the mounting seat 31, at least one tap tool 17 is arranged on the mounting seat 31, and the tap tools 17 are uniformly distributed below the mounting seat 31. Specifically, a spline shaft 29 is attached to the upper end of each tap cutter 17, and a spline housing gear 30 is fitted around the outside of each spline shaft 29. And the tap tool 17 is connected with the mounting seat 31 through the corresponding spline shaft 29 and the spline housing gear 30, and the upper end of the spline shaft 29 is positioned between the fixed seat 25 and the mounting seat 31. In addition, a tool changing mechanism 18 is further arranged on the mounting seat 31, and the tool changing mechanism 18 can drive the mounting seat 31 to rotate and rotate the tap tool 17 to be used to a working position. Further, still be provided with cutter rotary mechanism 16 and cutter telescopic machanism 15 on the mount pad 31, cutter rotary mechanism 16 can drive tap cutter 17 self and rotate, cutter telescopic machanism 15 can drive rotatory tap cutter 17 up-and-down motion to make tap cutter 17 resume the normal position after the tapping operation is accomplished.
The cutter rotating mechanism 16 comprises a tapping motor 21 and a rotating shaft, the tapping motor 21 is fixedly arranged on a fixed seat 25, and the output end of the tapping motor 21 is in transmission connection with a first tapping gear 24; the rotating shaft is rotatably connected to the fixed base 25. The both ends of rotation axis are provided with second tapping gear 23 and third tapping gear 28, just first tapping gear 24 meshes with second tapping gear 23, third tapping gear 28 meshes with spline housing gear 30, just third tapping gear 28 can mesh with spline housing gear 30 on all integral key shafts 29 simultaneously. In this way, the tapping motor 21 is controlled to rotate the third tapping gear 28 on the rotary shaft, and all the tap cutters 17 are driven to rotate simultaneously, thereby performing tapping. In the present invention, preferably, the second planetary reducer 22 is provided between the tapping motor 21 and the first tapping gear 24, the tapping motor 21 and the second planetary reducer 22 are drivingly connected, and the first tapping gear 24 and the output shaft of the second planetary reducer 22 are connected.
The tool retracting mechanism 15 comprises a spring 26 arranged between the fixed seat 25 and the mounting seat 31 and an electric push rod 20 fixedly arranged above the fixed seat 25. The number of the springs 26 is the same as that of the tap cutters 17, each spline shaft 29 is sleeved with one spring 26, the lower end of each spring 26 is fixedly connected with the upper end of the corresponding spline housing gear 30, and the upper end of each spring 26 is in contact with a limit plate at the upper end of the corresponding spline shaft 29; the motion direction of the electric push rod 20 is vertical, and when the electric push rod 20 extends out, the limiting plate and the spline shaft 29 can be pushed to move downwards along the axial direction, so that the tap tool 17 on the corresponding spline shaft 29 is pushed out.
In addition, the tapping process of the tapping device 11 in the present invention mainly includes the steps of:
step 1, a tool changing mechanism 18 works, and a screw tap tool 17 required to be used is rotated to a working position;
step 3, enabling the screw tap cutters 17 of all stations to rotate at the rotating speed required by the tapping process through the cutter rotating mechanism 16;
step 4, the whole tapping device 11 taps downwards and taps the pipe;
and 5, finishing tapping, and returning each part to the initial position.
It will be understood that spatially relative terms, such as "under …," "below," "lower," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description in this document. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The pipe cutting method of the four-chuck laser pipe cutting machine is characterized by comprising the four-chuck laser pipe cutting machine, wherein a machine body (5) is arranged on the four-chuck laser pipe cutting machine, a laser head assembly (6) is arranged on the machine body (5), and a first chuck (1), a second chuck (2), a third chuck (3) and a fourth chuck (4) are sequentially arranged on the machine body (5); the second chuck (2) is fixed on the lathe bed (5), the laser head assembly (6) is arranged above the second chuck (2), and the first chuck (1), the third chuck (3) and the fourth chuck (4) are movably arranged on the lathe bed (5); a feeding assembly (10) is arranged on one side, close to the first chuck (1), of the second chuck (2), and a discharging assembly (12) is arranged on one side, close to the fourth chuck (4), of the second chuck (2); the first chuck (1) and the second chuck (2) are provided with material length detection devices for detecting the length of the pipe;
the pipe cutting method comprises the following steps:
the method comprises the following steps that firstly, a feeding assembly (10) feeds a first chuck (1), and a pipe to be cut is clamped through the first chuck (1); the length of the pipe to be cut is measured through the material length detection device in the clamping process, the length L of the pipe to be cut is obtained, the length L of the pipe to be cut is compared with the minimum pipe length L1 which can be clamped by the first chuck (1) and the second chuck (2) at the same time and can be cut by the laser head assembly (6), and if L is less than L1, the pipe to be cut cannot be cut at one end, far away from the first chuck (1), of the pipe to be cut in the direction from the fourth chuck (4) to the first chuck (1); if L is larger than or equal to L1, cutting the pipe to be cut along the direction from the fourth chuck (4) to the first chuck (1) at one end of the pipe to be cut away from the first chuck (1), and entering the second step after the pipe to be cut is subjected to the cutting;
step two, comparing the material length LC of a finished product material obtained after the pipe to be cut is cut with the maximum finished product material length L3 which can be contained in a finished product skip car (7), and entering step three if LC is less than or equal to L3; if LC > L3, go to step four;
step three, the first chuck (1) and the second chuck (2) clamp the residual part of the pipe to be cut after cutting, the third chuck (3) and the fourth chuck (4) do not clamp the finished product, and the finished product directly falls into a finished product skip (7) below;
fourthly, the first chuck (1) and the second chuck (2) clamp the residual part of the pipe to be cut after cutting, the third chuck (3) clamps the finished product material and moves the finished product material to the upper part of the blanking assembly (12), so that the blanking assembly (12) supports the finished product material, then the third chuck (3) loosens the finished product material, the finished product material moves from the third chuck (3) to the blanking assembly (12), and the blanking assembly (12) realizes blanking action;
the material length detection device comprises a first length detection switch and a second length detection switch, the first length detection switch is arranged at one end, close to the second chuck (2), of the first chuck (1), the second length detection switch is arranged at one end, close to the first chuck (1), of the second chuck (2), and the first length detection switch and the second length detection switch are used for judging whether pipes exist at the first chuck (1) and the second chuck (2) or not respectively;
the method for measuring the length of the pipe to be cut by the material length detection device in the first step comprises the following steps: after a feeding assembly (10) conveys a pipe to be cut between a first chuck (1) and a second chuck (2), the first chuck (1) moves towards the direction close to the second chuck (2) until a first length detection switch detects the pipe to be cut and stops moving, the current coordinate of the first chuck (1) is recorded as x1, the first chuck (1) moves forwards for a distance a and reaches a position capable of stably clamping the pipe to be cut, the current coordinate of the first chuck (1) is recorded as x4, and the first chuck (1) continues to move forwards after clamping the pipe to be cut; a second material length detection switch on the second chuck (2) stops after detecting the existence of the material; recording the current coordinate of the first chuck (1) as x2 and the coordinate of a second length detection switch on the second chuck (2) as x 3; the total length of the pipe is L = | x3-x2| + a, where a = | x4-x1 |.
2. The pipe cutting method of the four-chuck laser pipe cutting machine according to claim 1, wherein in the fourth step, the length LC of the finished product is compared with the maximum length L4 of the finished product which can be held in the maximum moving range of the third chuck (3), if LC > L4, the third chuck (3) holds the finished product and moves to the direction close to the second chuck (2), and the finished product is dropped onto the blanking assembly (12) from the position between the third chuck (3) and the fourth chuck (4); and if LC is less than or equal to L4, the third chuck (3) clamps the finished product and moves towards the direction close to the fourth chuck (4), and the finished product is discharged to the discharging assembly (12) from the position between the third chuck (3) and the second chuck (2).
3. The pipe cutting method of the four-chuck laser pipe cutting machine according to claim 2, wherein the third chuck (3) alone clamps the finished material or the third chuck (3) and the fourth chuck (4) simultaneously clamp the finished material while clamping the finished material.
4. The pipe cutting method of the four-chuck laser pipe cutting machine according to claim 3, further comprising a fifth step of: calculating the length of the residual material after the pipe to be cut is cut to obtain the length LY of the residual pipe, comparing the length LY of the residual pipe with L1, and if the length LY is less than L1, continuing to cut the pipe to be cut from the fourth chuck (4) to the first chuck (1) at one end of the pipe to be cut away from the first chuck (1); if LY is larger than or equal to L1, the pipe to be cut can be cut continuously from the fourth chuck (4) to the first chuck (1) at the end far away from the first chuck (1), and the step two is carried out after cutting.
5. The pipe cutting method of the four-chuck laser pipe cutting machine according to claim 4, wherein after the end of the pipe to be cut away from the first chuck (1) is not cut from the fourth chuck (4) to the first chuck (1), the length of the material L0 of the rest part of the pipe to be cut at this time is calculated, and L0 is compared with the minimum pipe length L2 which can be clamped by the first chuck (1), the second chuck (2), the third chuck (3) and the fourth chuck (4) at the same time, if L0L 2 is reached, the pipe to be cut is subjected to zero-tailing cutting, the first chuck (1), the second chuck (2), the third chuck (3) and the fourth chuck (4) clamp the pipe to be cut at the same time, then the jaws of the first chuck (1) and the second chuck (2) are opened, only the jaws of the third chuck (3) and the fourth chuck (4) clamp and move to the direction away from the laser head assembly (6), the whole pipe to be cut is cut in the moving process.
6. The pipe cutting method of the four-chuck laser pipe cutting machine according to claim 5, wherein the loading in the first step comprises the following specific steps: the pipe to be cut is placed on the feeding conveyer belt (9), and the feeding conveyer belt (9) drives the pipe to be cut to move towards the direction close to the lathe bed (5) until the pipe to be cut is positioned at the output end of the feeding conveyer belt (9); then material loading bearing roller frame (8) will treat that cut tubular product takes off from the conveyer belt through lifting action, then will treat that cut tubular product removes to between first chuck (1) and second chuck (2) to guarantee to treat that the axis of cutting tubular product and the axis of first chuck (1) are the collinear, first chuck (1) are treated later and are cut tubular product and carry out the centre gripping action.
7. The pipe cutting method of the four-chuck laser pipe cutting machine according to any one of claims 1 to 6, wherein the laser head assembly (6) is provided with a tapping device (11), and the tapping device (11) can drill or ream or tap a pipe to be cut at any time during the pipe cutting process.
8. The pipe cutting method of a four-chuck laser pipe cutting machine according to claim 7, characterized in that the tapping device (11) comprises a mounting seat (31), the mounting seat (31) being provided with at least one tap tool (17); the mounting seat (31) is further provided with a tool changing mechanism (18), and the tool changing mechanism (18) can drive the mounting seat (31) to rotate and rotate a screw tap tool (17) required to be used to a working station; the mounting seat (31) is further provided with a cutter rotating mechanism (16) and at least one group of cutter telescopic mechanism (15), the cutter rotating mechanism (16) can drive the screw tap cutter (17) to rotate, the cutter telescopic mechanism (15) can independently drive the screw tap cutter (17) to move up and down to perform tapping operation, and the screw tap cutter (17) is restored to the original position after the tapping operation is completed.
9. The pipe cutting method of the four-chuck laser pipe cutting machine according to claim 8, wherein the tapping process of the tapping device (11) mainly comprises the steps of:
step 1, a tool changing mechanism (18) works, and a screw tap tool (17) required to be used is rotated to a working position;
step 2, pushing out the screw tap cutters (17) on different stations by preset lengths through a cutter telescopic mechanism (15) according to the depth of the holes to be machined on the pipe;
step 3, enabling the tap cutters (17) of all stations to rotate according to the rotating speed required by the tapping process through a cutter rotating mechanism (16);
step 4, the whole tapping device (11) is tapped downwards, and the pipe is tapped;
and 5, finishing tapping, and returning each part to the initial position.
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| CN111299871B (en) * | 2019-11-27 | 2022-05-20 | 广东宏石激光技术股份有限公司 | Pipe cutting machine with pipe length measuring device and pipe length measuring method |
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| JP2000246535A (en) * | 1999-03-01 | 2000-09-12 | Mitsubishi Plastics Ind Ltd | Pipe cutting device |
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| CN114043102A (en) | 2022-02-15 |
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