JP6225001B2 - Laser cutting processing method and apparatus, and automatic programming apparatus - Google Patents

Description

  The present invention relates to a laser cutting method and apparatus for processing a hole having an appropriate shape on a plate-like workpiece (product), and an automatic programming apparatus for generating NC data for controlling the laser cutting apparatus. More specifically, a large scrap generated in a laser processing hole is divided into a plurality of small scrap pieces when drilling a workpiece by a laser cutting processing apparatus, and the hole processing is performed without causing interference between the scrap pieces and the laser processing head. The present invention relates to a laser cutting method and apparatus and an automatic programming apparatus.

  When laser cutting of a relatively large hole is performed on a plate-shaped workpiece, a large scrap is generated in the hole. When this scrap is larger than the work shooter provided on the work table supporting the work so as to be freely opened and closed, it is difficult to discharge the scrap. Also, as an example of the work table, when the work is horizontally supported by a work table having a suitable distance between the skids for supporting the work, and the workpiece is subjected to laser cutting processing of holes, the generated scrap is placed on the skid. Will remain. Therefore, in order to drop the scrap from the work shooter into the discharge port or to drop the scrap within the interval of the skid on the processing table, the scrap in the hole is divided and cut into a plurality of small scrap pieces. (For example, refer to Patent Document 1).

JP-A-10-244394

  According to the configuration described in Patent Document 1, the large scrap generated in the hole is divided into small scrap pieces, so that the scrap pieces can be discharged relatively easily. However, when the scrap in the hole is divided and cut into a plurality of small scrap pieces and discharged, for example, if the scrap pieces to be discharged are inclined and caught in the holes, a part of the scrap piece protrudes from the workpiece upper surface. There are things to do. As described above, when a part of the scrap piece protrudes from the upper surface of the workpiece, the protruding portion and the laser processing head may interfere with each other, and continuous laser cutting processing may be difficult.

The present invention was made in view of the problems as described above, and is a laser cutting method for performing laser cutting of a hole in a plate-shaped workpiece,
(A) a step of laser machining a dividing line into the hole in a state in which one end and the other end are connected to a contour line of the hole in order to divide scrap generated by laser cutting of the hole into a plurality of scrap pieces;
(B) Even when a part of the scrap piece after being cut and separated protrudes from the upper surface of the workpiece, it should fall last from the workpiece in order to prevent interference between the protruding portion and the laser processing head. Performing a piercing process in the scrap piece and performing a laser cutting process in a direction intersecting the outline of the hole at a position away from one end and the other end of the dividing line;
(C) a step of performing laser cutting processing in a direction away from the one end of the dividing line along the contour line when the laser cutting processing has reached an intersecting position with the contour line;
(D) performing a laser cutting process on one end of the dividing line through the other end of the dividing line and performing a laser cutting process on the intersecting position from the one end of the dividing line;
  It is characterized by having.

Further, the laser cutting apparatus includes a laser processing head that is relatively movable in the X, Y, and Z axis directions with respect to a plate-like work on the work table, and controls the operation of the laser processing head. The control device includes a graphic data memory storing a graphic for cutting a workpiece from a plate-shaped material, display means for displaying a graphic data graphic stored in the graphic data memory, and A hole selecting means for selecting a hole in the figure on the display screen on which the figure is displayed, and a scrap dividing line in a state where one end and the other end are connected to the outline of the hole in the hole selected by the hole selecting means. a dividing line arrangement means for arranging a part of the scrap pieces after being cut and separated even when projecting on the upper surface of the workpiece, in order to prevent interference between the protruding portion and the laser processing head A machining start position setting means for setting the split laser cutting start position to the last drop to be scrap pieces in the scrap pieces, dividing lines disposed with the position data and the shape data of the hole which is selected in said bore When laser cutting is performed in a direction intersecting the outline of the hole at a position away from one end and the other end of the dividing line from the laser cutting start position based on the arrangement data and the laser cutting processing start position data Laser cutting is performed along the contour line in a direction away from one end of the scrap dividing line from a position intersecting the contour line, and laser cutting is performed from the other end of the scrap dividing line to the intersecting position through one end. NC data generating means for generating NC data for processing, and an NC data memory for storing the generated NC data. It is characterized in that that example.

  Further, in the laser cutting apparatus, the processing start position setting means is a position that is set in advance in the circumferential direction of the hole by a distance from a scrap dividing line that is disposed last, and that is the contour line of the hole. A machining start position memory preliminarily stored as a machining start position at a position away from the inside by a predetermined distance is provided.

Further, the laser of the plate-shaped material is applied to a control device of a laser cutting processing device having a laser processing head that is relatively movable in the X, Y, and Z-axis directions with respect to the plate-shaped material on the work table. An automatic programming device that provides a processing program for performing cutting processing, wherein a part placement unit that places a product shape on a plate-like material based on product shape data, and a plate-like material placed by the part placement unit Display means for displaying the product and the plate material, a hole selection means for selecting a hole in the displayed product on the display screen on which the plate material is displayed, and one end in the hole selected by the hole selection means and a dividing line arrangement means the other end to place the scrap dividing line while connected to the contour of the hole, a part of the scrap pieces after being cut and separated even when projecting on the upper surface of the workpiece To prevent interference between the protruding portion and the laser processing head, a machining start position setting means for setting a laser cutting machining start position to the last to fall to scrap pieces in the divided scrap pieces, said selected Based on the position data and shape data of the hole, the dividing line arrangement data arranged in the hole, and the laser cutting processing start position data, the position is separated from one end and the other end of the dividing line from the laser cutting start position. Laser cutting is performed along the contour in a direction away from one end of the scrap dividing line from a position intersecting the contour when laser cutting is performed in a direction intersecting the contour of the hole, and the scrap through one end from the other end of the dividing line products laser cut in the NC data and the plate-like material for performing laser cutting extending in the intersecting position And NC data generation means for generating NC data for performing machining, and NC data memory for storing the generated NC data, is characterized in that it comprises a.

  Further, in the automatic programming device, the processing start position setting means is a position separated from a scrap dividing line arranged last by a predetermined distance in the circumferential direction of the hole, and the contour line of the hole A machining start position memory preliminarily stored as a machining start position at a position away from the inside by a predetermined distance is provided.

  According to the present invention, since the scrap in the hole generated by performing the laser cutting process on the workpiece is divided into small scrap pieces, the scrap pieces can be easily discharged and discharged. When the scrap piece is caught, it occurs after the laser processing head passes. That is, the laser processing head performs laser cutting processing in a direction away from the cut and separated scrap piece, so even if a part of the scrap piece protrudes from the upper surface of the workpiece, the laser processing head Will not interfere with the scrap pieces.

It is explanatory drawing in the case where a scrap piece and a laser processing head interfere, and a case where interference is avoided, when scraping and dividing the scrap in a hole by laser cutting processing. It is explanatory drawing of the functional block diagram of the control apparatus in a laser cutting processing machine. It is operation | movement explanatory drawing in the case of arrange | positioning a cutting line in a hole. It is operation | movement explanatory drawing in the case of arrange | positioning a cutting line in a hole. It is explanatory drawing of the piercing process position (processing start position) which starts a laser cutting process along the outline of a hole. It is explanatory drawing of the functional block diagram in an automatic programming apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. To facilitate understanding, first, a cause of interference between a scrap piece and a laser processing head will be described.

  As shown in FIG. 1 (A), when a plate-shaped workpiece (product) W is subjected to laser cutting of an appropriately shaped hole H, a large scrap S corresponding to the shape of the hole H is generated in the hole H. . In order to divide the scrap S into a plurality of scrap pieces SA and SB, before the laser cutting of the hole H, an appropriate number of dividing lines L are laser processed in a hole equivalent region corresponding to the position of the hole H. . Then, as shown by an arrow A from one end LA of the dividing line L, laser cutting is performed along the contour line of the hole H, and when the other end LB of the dividing line L is reached, the scrap piece SB is removed from the workpiece W. Separated by cutting. Thereafter, when laser cutting in the direction of arrow A proceeds and reaches the one end LA from the other end LB, one round of laser cutting is performed along the contour line of the hole H. It is cut and separated from the workpiece W.

  The scrap piece SB cut and separated from the work W may be dropped and discharged, but sometimes the scrap piece SB is caught and the one end LA side protrudes from the upper surface of the work W. Thus, when a part of the previously cut scrap piece SB protrudes from the upper surface of the workpiece, laser cutting is performed along the contour line of the hole H, and when the laser processing head approaches the one end LA, the scrap piece SB Laser cutting head may interfere with laser cutting.

  Therefore, in this embodiment, laser cutting of the workpiece W is performed as shown in FIG. That is, the dividing line L is processed to divide the scrap S into scrap pieces SA and SB. Then, as shown in (2) of FIG. 1 (B), piercing P is performed in the scrap piece SB, and laser cutting is performed from the piercing position to the outline direction of the hole H as indicated by an arrow A. In addition, laser cutting processing is performed along the contour line from the intersection position C with the contour line.

  In this case, when the laser cutting process proceeds and the laser cutting process reaches the other end LB of the dividing line L, the scrap piece SB is placed on the workpiece W between one end LA of the dividing line L and the intersection position C. Connected. Thereafter, when laser cutting along the contour line of the hole H reaches the one end LA from the other end LB, the scrap piece SA is cut and separated from the workpiece W. However, the scrap piece SB is in a state of being connected to the workpiece W between the one end LA and the intersection position C. Accordingly, one end side of the scrap piece SB does not protrude from the upper surface of the workpiece W. Therefore, when the scrap piece SA is cut and separated, the scrap piece SB and the laser processing head do not interfere with each other. Thereafter, the scrap piece SB is cut and separated from the workpiece W by performing laser cutting processing from one end LA of the dividing line L to the intersection position C.

  In FIG. 1C, when laser cutting of a rectangular hole HA is performed, laser cutting of a plurality of dividing lines L1 and L2 is performed, and piercing P is performed in the scrap piece SC. From this piercing position, The case where laser cutting of the hole HA is performed is shown. In this case, when the laser cutting process proceeds in the direction of arrow A along the outline of the hole HA, the scrap pieces SA are first cut and separated from the workpiece W, and then sequentially cut and separated from the scrap pieces SB and SC. The piece SC is finally cut and separated from the workpiece W. Incidentally, in FIG. 1C, when the scrap piece SA is pierced and laser cut, the scrap piece SA is finally cut and separated from the workpiece W. Similarly, when the scrap piece SB is subjected to piercing and laser cutting, the scrap piece SB is finally cut and separated from the workpiece W.

  As already understood, when laser cutting of a hole having an appropriate shape is performed on the workpiece W, when the large scrap S generated by the hole processing is cut and divided into a plurality of small scrap pieces SA and SB, the hole equivalent region of the workpiece An appropriate number of dividing lines L are laser-cut by the laser cutting process. At this time, both scrap portions SA and SB are processed so as to be in contact with or overlap the outline of the hole and to be connected to the outline of the hole. . In other words, when the plurality of dividing lines L are laser processed in the hole, the dividing lines L are arranged so as not to generate a region surrounded only by the dividing lines L.

  Then, piercing P is performed in the scrap piece SB to be dropped last, laser cutting is started, and laser cutting is performed along the outline of the hole, whereby a plurality of small scrap pieces SA and SB are placed in the hole. Can be cut and separated. By cutting the scrap pieces SA and SB in this way, the scrap pieces SA are sequentially cut and separated from the scrap pieces SA on the rear side of the laser processing head in the traveling direction along the outline of the hole, and laser cutting is performed by piercing. The scrap piece SB that has started processing is finally cut and separated.

  Therefore, even when a part of the scrap piece SA after being cut and separated protrudes from the upper surface of the workpiece W, the protruding portion and the laser processing head do not interfere with each other.

  By the way, as already known, a laser cutting apparatus for performing laser cutting processing of various shapes on a plate-shaped workpiece, for example, a processing pallet or work table provided with a skid (the processing pallet also supports the workpiece). Therefore, it is provided with a laser processing head (not shown) that is relatively movable in the X, Y, and Z axis directions with respect to a plate-like work on the work table). Further, the laser cutting processing apparatus includes a control device 1 (see FIG. 2) that controls the operation of the laser processing head with respect to the workpiece.

  The control device 1 is composed of a computer and includes a CPU 3, a RAM 5, a ROM 7, an input unit 9, and a display unit 11. The input means 9 is connected to an automatic programming device 13 that supplies (sends) a machining program to the control device 1. Note that the machining program (NC data) generated in the automatic programming device 13 can be supplied to the control device 1 via an appropriate storage medium. A machining program memory 15 for storing a machining program generated in the automatic programming device is provided in the control device 1. In addition, the control device 1 stores a subprogram for performing laser cutting processing for cutting and separating the hole H to be processed into the workpiece W and the large scrap S in the hole H into a plurality of small scrap pieces SA and SB. A program memory (NC data memory) 17 is provided.

  Further, the control device 1 is provided with a graphic data memory 19. The graphic data memory 19 stores the shape data of the workpiece (product) W to be laser-cut and the position and shape data of the holes H arranged in the workpiece W. The graphic data stored in the graphic data memory 19 is calculated by the calculation means 21 that performs various calculations, and the graphic based on the graphic data is displayed on the display screen 23 in the display means 11.

  The control device 1 is connected to a hole selecting means 25 for selecting a hole H included in the work (product) W displayed on the display screen 23. The hole selection means 25 is constituted by, for example, a mouse or the like that operates a cursor 27 (see FIG. 3) displayed on the display screen 23. When the hole H is selected, the hole H is selected by placing the cursor 27 on the hole H on the display screen 23 and clicking. Further, the control device 1 is provided with a dividing line arrangement means 29 connected thereto. The dividing line arranging means 29 has a function of arranging a linear scrap dividing line 31 (see FIG. 3) displayed on the display screen 23 in the selected hole H, and the hole selecting means 25 and a common mouse.

  In addition, as a structure of the said hole selection means 25 and the dividing line arrangement | positioning means 29, it can also be set as the structure which selects the hole H by contacting the display screen 23, or arrange | positions the scrap dividing line 31. FIG. That is, a touch pen or the like can be used instead of the mouse or the like.

  The scrap dividing line 31 is displayed on the display screen 23 as a vertical straight line as shown in FIG. 3 and FIG. When 0 ° is input as the angle, it is displayed as a horizontal straight line as shown in FIGS. If the angle of the scrap dividing line 31 is input, for example, + 45 °, it is displayed in a state inclined 45 ° counterclockwise from the horizontal state, and conversely, if it is input −45 °, it is clockwise from the horizontal state. Is displayed in a state inclined at 45 °. That is, the inclination angle of the scrap dividing line 31 can be set to a desired inclination angle corresponding to the shape, size and inclination of the hole H in the workpiece W.

  The dividing line arranging means 29 aligns the cursor 27 with the scrap dividing line 31 displayed on the display screen 23, and moves the cursor 27 in the horizontal direction or the vertical direction on the display screen 23, thereby the scrap dividing line 31. It has a function to move up, down, left and right. Then, the cursor 27 is placed at a position where the hole H where the scrap dividing line 31 is to be disposed and the scrap dividing line 31 intersect (FIGS. 4A to 4A, 4B to 2B, FIG. C)-(1)), when clicked, the hole H is selected, as shown in FIGS. 4 (A)-(2), 4 (B)-(3), and 4 (C)-(2). As shown, the dividing line L is disposed in the hole H. In this case, both ends of the dividing line L are connected to the outline of the hole H.

  The number of dividing lines L arranged in the hole H can be set to a desired number corresponding to the size of the scrap pieces SA and SB to be divided. Further, the inclination angle of the dividing line L can also be set to a desired inclination angle. That is, the large scrap S in the hole H can be divided into a desired plurality of small scrap pieces SA and SB. In addition, when the plurality of dividing lines L are arranged in the hole H, the dividing lines L are arranged so as not to generate a region surrounded by the plurality of dividing lines L. By arranging a plurality of dividing lines L as described above, each scrap piece SA, SB cut and separated into small scrap pieces SA, SB in the hole H is divided into a state where it is connected to the outline of the hole H. It is what is done.

  In addition, as a function which arrange | positions the scrap dividing line 31 in the hole H, it can arrange | position also by providing the following functions. That is, when the cursor 27 is placed at an appropriate position of the contour line in the hole H and clicked, the scrap dividing line 31 is displayed in the hole H from the position of the contour line where the cursor 27 is aligned. In this case, when the contour line is a straight line, the scrap dividing line 31 is displayed perpendicular to the contour line, and when the contour line is a curve, the scrap dividing line 31 is displayed perpendicular to the tangent line of the contour line. It is desirable to have

  The control device 1 is provided with a dividing line data memory 33. The dividing line data memory 33 stores the position data of the selected hole H and the shape data of the hole H in the work W, and stores arrangement data of an appropriate number of dividing lines L arranged in the hole H. Is.

  Further, the control device 1 is provided with machining head operation control means 35. This machining head operation control means 35 performs X-, Y-, and Z-axis directions of a laser machining head (not shown) according to a machining program stored in the machining program memory 15 in order to perform laser cutting of the workpiece W and the hole H. It has a function to control the operation of the.

  Further, the control device 1 is provided with processing start position setting means 37 for starting laser cutting along the contour line of the hole H after performing laser cutting processing of the dividing line L in the hole H. Yes. The means for setting the processing start position may be configured to click the mouse after moving the cursor 27 into the desired scrap piece SA, SB. In this case, it is possible to arrange the processing start position in the strap pieces SA and SB at the desired positions regardless of the cutting order of the dividing lines L arranged in the holes H. Therefore, the machining start position may be far away from the position of the dividing line L where the last cutting process is performed, which is not desirable for improving efficiency.

  Therefore, in this embodiment, the machining start position setting unit 37 includes a machining start position memory 39. In the machining start position memory 39, as shown in FIG. 5, when the laser cutting of the dividing line L in the hole H is performed, the hole H to the machining end LE of the dividing line LL to be cut last. The circumferential distance CD and the inner distance ID from the contour line of the hole H are set and stored. Therefore, when the dividing line LL to be cut last is determined, the machining start position, that is, the piercing process position P can be set immediately.

  Further, the control device 1 is provided with NC data generating means 41. The NC data generating means 41 has a function of generating NC data for performing laser cutting along the contour lines of the plurality of dividing lines L and the holes H arranged in the holes H. That is, the NC data generating means 41 has the hole H position data, shape data and arrangement data of the plurality of dividing lines L stored in the dividing line data memory 33 and the machining start position stored in the machining start position memory 39. Based on the data of (piercing processing position P), in order to perform laser cutting processing along the plurality of dividing lines L arranged in the hole H and the contour line of the hole H, the processing head operation control means 35. It has a function of generating NC data (machining program) that can be executed by

  The processing conditions for performing laser cutting processing of the dividing line L in the hole H and the contour line of the hole H are the same processing conditions as the processing program stored in the processing program memory 15. The NC data (machining program) generated by the NC data generating means 41 is stored in the subprogram memory 17 and is executed at the time of laser cutting of the corresponding hole H.

  In the configuration as described above, when the machining program generated in the automatic programming device 13 is input to the control device 1, the machining program is stored in the machining program memory 15. When the shape data of the workpiece (product) W is input simultaneously with the machining program, the shape data is stored in the graphic data memory 19. As a configuration for storing the shape data of the workpiece W in the graphic data memory 19, the control device 1 includes program analysis means (not shown). Then, the machining program can be analyzed by the program analysis means, and the shape data of the workpiece W can be stored in the graphic data memory 19.

  Based on the shape data stored in the graphic data memory 19, the shape of the workpiece W is displayed on the display screen 23 of the display means 11, and the cursor 27 and the scrap dividing line 31 are displayed on the display screen 23. Then, as shown in FIG. 3, the cursor 27 is aligned with the scrap dividing line 31 and moved to the position of the desired hole H in the workpiece W. Then, the scrap dividing line 31 is arranged at the position of the desired hole H, and the cursor 27 is aligned with the intersection position of the outline of the hole H and the scrap dividing line 31 (FIG. 4 (A)-(1)). , FIG. 4 (B)-(2), FIG. 4 (C)-(1)), when clicked, the hole H is selected and the dividing line L is arranged in the hole H (FIG. 4). (See (A)-(2), FIG. 4 (B)-(3), FIG. 4 (C)-(2)). FIG. 4B shows an example in which the scrap dividing line 31 that is 90 ° in FIG. 4A is changed to 0 °.

  By performing the operation as described above a plurality of times and the operation by changing the angle of the scrap dividing line 31 a plurality of times, a plurality of dividing lines L are arranged in the selected hole H. A plurality of dividing lines L are arranged in each hole H by performing the same operation on each hole H in the workpiece W. The order of laser cutting processing of the dividing lines L arranged in the holes H is set in advance in the order of arrangement of the dividing lines L with respect to the holes H. Accordingly, the piercing processing position P is set corresponding to the dividing line L arranged last.

  As described above, when the dividing line L is arranged for each hole H of the workpiece W, the position data, the shape data, the arrangement data of the dividing line L, and the last dividing line L are set for each hole H. The position data of the piercing position P is stored in the dividing line data memory 33 for each hole H. Based on the data corresponding to each hole H stored in the dividing line data memory 33, the laser cutting processing of each dividing line L in each hole H and the laser along the contour line of each hole H are performed. NC data (machining program) for cutting is generated by the NC data generating means 41. The generated NC data is stored in a subprogram memory (NC data memory) 17.

  As described above, a machining program for performing laser machining on the workpiece W is stored in the machining program memory 15, and the large scrap S in each hole H in the workpiece W is divided into a plurality of small scrap pieces SA and SB. When a machining program for performing laser cutting along the contour lines of the plurality of dividing lines L and the holes H is stored in the subprogram memory 17, the laser is controlled under the control of the machining head operation control means 35. The operation of the machining head is controlled, and the workpiece W is laser cut.

  At this time, the scrap in each hole H of the workpiece W is divided into small scrap pieces by an appropriate number of dividing lines L. And when performing laser cutting along the outline of each hole H, laser cutting is performed from the piercing position P in the scrap piece to be dropped last. Therefore, when each scrap piece is cut and separated from the workpiece W in each hole H, the scrap pieces are sequentially cut and separated on the rear side in the traveling direction of the laser processing head. Therefore, even when a part of the scrap piece after being cut and separated protrudes from the upper surface of the workpiece W, the scrap piece from which the part protrudes does not interfere with the laser processing head. Is. That is, the laser cutting process is not stopped by the interference between the scrap piece and the laser processing head.

  By the way, in the above description, the control device 1 generates NC data (processing program) for performing laser cutting processing of the dividing line L in the hole H in the workpiece W and laser cutting processing along the contour line of the hole H. Explained. However, the NC data can be generated by the automatic programming device 13. That is, the automatic programming device 13 is composed of a computer, like the control device 1. And the component which has the same function as the component in the said control apparatus 1 is provided. In addition, the overlapping description is abbreviate | omitted as attaching | subjecting the same code | symbol to the component which show | plays the same function.

  As shown in FIG. 6, the automatic programming device 13 includes a product shape data memory 43 that stores data on the outer shape of the workpiece (product) W, and stores data on the holes H of various shape dimensions. A hole shape data memory 45 is provided. Further, the automatic programming device 13 is provided with component placement means 47 for placing the product W on a plate-like material and placing various holes H in the product W. The component arranging means 47 is constituted by a mouse, for example, and operates the cursor 27 displayed on the display screen 23 in the display means 11 to arrange the products W and holes H.

  That is, when the shape dimension of the plate material is input from the input unit 9, the shape of the plate material is displayed on the display screen 23. Then, the product (work) W is displayed on the display screen 23 based on the product shape data stored in the product shape data memory 43. By operating the component placement means 47 to align the cursor 27 with the displayed product W, and moving the cursor 27 to the inside of the plate material displayed on the display screen 23, the product W for the plate material is displayed. Is arranged. Thereafter, various holes H are displayed on the display screen 23 based on the data stored in the hole shape data memory 45. Then, by operating the component arranging means 47, the cursor 27 is moved to the hole H on the display screen 23, and the hole H is moved into the product W, whereby the hole H is arranged with respect to the product W.

  As described above, when the product W is arranged on the plate-shaped material and each hole H is arranged on the product W, the arrangement data is stored in the component arrangement data memory 49. In other words, the position data of the product W and the shape data of the product with respect to the plate material are stored in the component arrangement data memory 49. Further, the part arrangement data memory 49 stores the position data of each hole H and the shape data of each hole H with respect to the product W. Based on the data stored in the component arrangement data memory 49, the product W and the hole H are displayed on the display screen 23 as shown in FIG.

  As described above, by displaying the scrap dividing line 31 and the cursor 27 on the display screen 23 on which the product W and the hole H are displayed, the plurality of holes H in the product W are respectively displayed in the same manner as described above. The dividing line L can be arranged. Therefore, the NC data generating means 41 provided in the automatic programming device 13 can generate a machining program for performing laser cutting along the dividing line L in each hole H and the contour line of each hole H. It can be stored.

  As already understood, a machining program for dividing the large scrap S in the hole H provided in the workpiece (product) W into a plurality of small scraps SA and SB can be generated also in the control device 1. It can also be generated in the automatic programming device 13.

  When a machining program is supplied from the automatic programming device 13 to the control device 1, a machining program for performing laser machining of the workpiece W and a machining program stored in the subprogram memory 17 are supplied as a series of machining programs. It is also possible.

DESCRIPTION OF SYMBOLS 1 Control apparatus 11 Display means 13 Automatic programming apparatus 15 Machining program memory 17 Subprogram memory (NC data memory)
DESCRIPTION OF SYMBOLS 19 Graphic data memory 23 Display screen 25 Hole selection means 27 Cursor 29 Dividing line arrangement means 31 Scrap dividing line 33 Dividing line data memory 37 Machining start position setting means 39 Machining start position memory 41 NC data generation means

Claims (5)

A laser cutting method for performing laser cutting of a hole in a plate-shaped workpiece,
(A) a step of laser machining a dividing line into the hole in a state in which one end and the other end are connected to a contour line of the hole in order to divide scrap generated by laser cutting of the hole into a plurality of scrap pieces;
(B) Even when a part of the scrap piece after being cut and separated protrudes from the upper surface of the workpiece, it should fall last from the workpiece in order to prevent interference between the protruding portion and the laser processing head. Performing a piercing process in the scrap piece and performing a laser cutting process in a direction intersecting the outline of the hole at a position away from one end and the other end of the dividing line;
(C) a step of performing laser cutting processing in a direction away from the one end of the dividing line along the contour line when the laser cutting processing has reached an intersecting position with the contour line;
(D) performing a laser cutting process on one end of the dividing line through the other end of the dividing line and performing a laser cutting process on the intersecting position from the one end of the dividing line;
  A laser cutting method characterized by comprising: A laser cutting processing apparatus having a laser processing head that is relatively movable in the X, Y, and Z axis directions with respect to a plate-like work on a work table, the control device controlling the operation of the laser processing head The control device includes a graphic data memory storing a graphic for cutting a workpiece from a plate-shaped material, display means for displaying a graphic of the graphic data stored in the graphic data memory, and the graphic On the displayed display screen, a hole selecting means for selecting a hole in the figure, and a scrap dividing line in which one end and the other end are connected to the outline of the hole are arranged in the hole selected by the hole selecting means. a dividing line arrangement means, a part of the scrap pieces after being cut and separated is a case where the projecting upper surface of the workpiece, in order to prevent interference between the protruding portion and the laser processing head, divided Is a machining start position setting means for setting a laser cutting starting position into scrap pieces inside should fall at the end in the scrap pieces, dividing line arrangement which is arranged between the position data and the shape data of the hole which is selected in said bore When laser cutting is performed in a direction intersecting the contour line of the hole at a position away from one end and the other end of the dividing line from the laser cutting start position based on the data and the laser cutting processing start position data Laser cutting is performed along a contour line in a direction away from one end of the scrap dividing line from a position intersecting the contour line, and laser cutting is performed from the other end of the scrap dividing line through one end to the intersecting position. NC data generating means for generating NC data for performing the operation, and an NC data memory for storing the generated NC data. Laser cutting device according to claim Rukoto. 3. The laser cutting apparatus according to claim 2 , wherein the processing start position setting means is a position that is preset in the circumferential direction of the hole by a distance from a scrap dividing line that is arranged last, and that is A laser cutting processing apparatus comprising a processing start position memory that stores in advance a position separated by a predetermined distance from the inside of a contour line as a processing start position. Laser cutting processing of the plate-shaped material with respect to the control device of the laser cutting processing device equipped with a laser processing head that is relatively movable in the X, Y, and Z-axis directions with respect to the plate-shaped material on the work table Is an automatic programming device that provides a machining program for performing component placement, a component placement unit that places a product shape on a plate-like material based on product shape data, a product on the plate-like material placed by the component placement unit, and Display means for displaying the plate-like material, hole selection means for selecting a hole in the displayed product on the display screen on which the plate-like material is displayed, one end and the other in the hole selected by the hole selection means a dividing line arrangement means end is positioned scrap dividing line while connected to the contour of the hole, a part of the scrap pieces after being cut and separated is a case where the projecting upper surface of the workpiece, the To prevent interference between the detecting portion and the laser processing head, a machining start position setting means for setting a laser cutting starting position into scrap pieces inside should fall at the end in the divided scrap pieces, the hole is selected Based on the position data and shape data, and the dividing line arrangement data and laser cutting processing start position data arranged in the hole, the hole is separated from the laser cutting start position at one end and the other end of the dividing line. When the laser cutting process is performed in the direction intersecting the contour line, the laser cutting process is performed along the contour line in a direction away from one end of the scrap dividing line from the position intersecting the contour line, and the scrap division is performed. laser cutting of NC data and products of the plate-like in material for through one end from the other end of the line performing laser cutting extending in the intersecting position Automatic programming device comprising the NC data generation means for generating NC data, and the NC data memory for storing the generated NC data, that is provided with a to do. The automatic programming apparatus according to claim 4, wherein the machining start position setting means is a predetermined distance away in the circumferential direction of the hole from the last placed scrap dividing line, and the hole automatic programming apparatus, characterized in that in advance with the machining starting position memory which stores the machining start position a position spaced a predetermined distance inwardly of the contour line of the.

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