JP2021051554A - Laser processing position determination method, laser processing position determination program and laser processing program creation device - Google Patents

Abstract

To enable the formation of a pierce in a stable manner in forming a hole astride corner parts sandwiched by two surfaces, a notch, an outer shape, or the like in a material.SOLUTION: A CAM device 20 redefines a pierce PI1 of corner parts R11, R14 at a position on a surface S11 deviating from the corner parts R11, R14 by an indirect redefinition method for changing the direction, length or approach angle of approach AP51. In this redefinition, if the position of the pierce PI1 cannot be defined outside the corner parts R11, R14, the CAM device 20 redefines the position of the pierce PI1 by a direct redefinition method. In the redefinition, the CAM device 20 extends the length of approach AP1 in accordance with the redefined position of the pierce PI1 after redefining the position of the pierce PI1 first. Therefore, the position of the pierce PI1 can be prevented from being arranged on the corner parts R11, R14 in forming a hole H1 astride the corner parts R11, R14 on the surface S11.SELECTED DRAWING: Figure 19B

Description

The present invention relates to a laser machining position determining method, a laser machining position determining program, and a laser machining program creating apparatus.

When forming a steel material having holes or notches, a through hole called a piercing is formed in the steel material by laser processing. Subsequently, the head of the laser machining machine is linearly moved from the piercing to the edge of the hole or notch in a predetermined direction, and a straight cutting portion called an approach is formed by laser machining. After the piercing and approach are formed, laser machining is performed from the edge of the hole or notch according to the shape of the hole or notch to form the hole or notch in the steel material.

The pierced and approach formed parts should not remain on the product side where the holes or notches are formed. For this reason, the piercing and approach are formed inside the holes or notches that are cut off from the steel by laser machining the holes or notches. Since the portion forming the piercing and the approach does not remain on the product side, the laser processing of the piercing and the approach can be performed by utilizing the period from the start of the output of the laser beam to the stabilization of the output.

By the way, in a pipe or a lightweight shaped steel in which a curved corner portion is formed by bending, a hole or a notch may be formed straddling the corner portion. Examples of the pipe include a square pipe and a long square pipe. Examples of the lightweight section steel include a lightweight angle steel, a lightweight unequal edge angle steel, a lightweight channel steel, and a lip channel steel.

When forming a hole or notch straddling the corner portion of the pipe or the lightweight structural steel, a laser beam for processing is applied to the curved corner portion while rotating the pipe or the lightweight structural steel. That is, the laser beam is also irradiated to the corner portion of the curved surface. Therefore, when forming a hole or notch straddling the corner portion of the pipe or the lightweight shaped steel, the corner portion is also subject to setting the position for forming the piercing.

The holes or notches straddling the corners may also be formed in the shaped steel formed by rolling or the like. Examples of the shaped steel include angle steel, unequal side angle steel, and channel steel. For example, Patent Document 1 describes a shaped steel that forms a hole or a notch that straddles two adjacent surfaces with a corner portion in between. In Patent Document 1, a processing method is proposed in which a hole or notch straddling two surfaces of a shaped steel is formed by laser processing by dividing a process for each surface.

Japanese Unexamined Patent Publication No. 2014-106761

In the processing method of Patent Document 1, since laser processing is performed for each surface, the position of the pierced earring is set at the corner portion where the flange extends in the penetrating direction of the web or the web extends in the penetrating direction of the flange. There is nothing. However, even in the case of shaped steel, when a hole or notch straddling the corner portion is formed while rotating like a pipe or a lightweight shaped steel, a laser beam is irradiated to the corner portion. Therefore, the corner portion of the shaped steel can also be a target for setting the position where the pierced earring is formed.

Then, in any of the pipes, lightweight shaped steels and shaped steels, when an attempt is made to open a pierced earring in the corner portion, a part of the laser beam and the assist gas irradiated to the corner portion is reflected and dispersed on the surface of the corner portion. To do. When the laser beam and the assist gas are dispersed, the laser beam and the assist gas are not irradiated with sufficient intensity in the penetrating direction of the pierced earrings in the corner portion. If the laser beam and the assist gas are not irradiated with sufficient intensity in the penetrating direction, the pierced earrings cannot be stably formed in the corner portion.

In the above description, the problems in forming holes or notches straddling the corners of lightweight shaped steel and shaped steel have been pointed out. However, the same problem also occurs when the outer shape of the product is formed across the corner portion of the lightweight shaped steel and the shaped steel.

An object of the present invention is to enable stable formation of pierced earrings when forming a processed portion such as a hole, a notch, and an outer shape straddling a corner portion sandwiched between two surfaces on a material to be processed. It is in.

In order to achieve the above object, the laser machining position determining method according to the first aspect of the present invention is
A shape that straddles the corner portion on a drawing in which the plurality of surfaces of a material to be processed that have a plurality of surfaces having a predetermined plate thickness and the two surfaces are adjacent to each other with the corner portion sandwiched between them in a plane shape. A preparatory step for preparing drawing data that defines the processing range of the material on which the processing portion of the above is formed, and
A pierced earring that penetrates the material in the direction of the plate thickness, which is formed before the formation of the processed portion, and a machining start point of the processed portion from the pierced portion at a portion to be cut off when the processed portion is formed on the material. The definition step of determining the position of the approach of a predetermined length for cutting the material according to the shape of the machined portion and defining each on the drawing.
In the drawing data, the position of the pierced earring defined in the area corresponding to the corner portion of the drawing is redefined outside the area, and the pierced earring position is redefined according to the redefined position of the pierced earring. Redefining steps to redefine the position of the approach,
including.

Further, in order to achieve the above object, the laser machining position determination program according to the second aspect of the present invention may be used.
On the computer
A shape that straddles the corner portion on a drawing in which the plurality of surfaces of a material to be processed that have a plurality of surfaces having a predetermined plate thickness and the two surfaces are adjacent to each other with the corner portion sandwiched between them in a plane shape. The reading step of reading the drawing data that defines the processing range of the material on which the processing part of the above is formed, and
A pierced earring that penetrates the material in the direction of the plate thickness, which is formed before the formation of the processed portion, and a machining start point of the processed portion from the pierced portion at a portion to be cut off when the processed portion is formed on the material. The definition step of determining the position of the approach of a predetermined length for cutting the material according to the shape of the machined portion and defining each on the drawing.
In the drawing data, the position of the pierced earring defined in the area corresponding to the corner portion of the drawing is redefined outside the area, and the pierced earring position is redefined according to the redefined position of the pierced earring. Redefining steps to redefine the position of the approach,
To execute.

Further, in order to achieve the above object, the laser machining program creating apparatus according to the third aspect of the present invention is
A shape that straddles the corner portion on a drawing in which the plurality of surfaces of a material to be processed that have a plurality of surfaces having a predetermined plate thickness and the two surfaces are adjacent to each other with the corner portion sandwiched between them in a plane shape. A drawing data storage unit that stores drawing data that defines the processing range of the material on which the processing unit is formed.
A pierced earring that penetrates the material in the direction of the plate thickness, which is formed before the formation of the processed portion, and a machining start point of the processed portion from the pierced portion at a portion to be cut off when the processed portion is formed on the material. The position of the approach of a predetermined length for cutting the material is determined according to the shape of the processed portion, and the position definition unit for generating the position definition data defined on the drawing, respectively.
In the drawing data, the position of the pierced earring defined in the area corresponding to the corner portion of the drawing is redefined outside the area, and the pierced earring position is redefined according to the redefined position of the pierced earring. Redefining the position of the approach The position redefinition part that generates the position redefinition data and
To be equipped.

According to the present invention, when forming a processed portion such as a hole, a notch, an outer shape, etc. that straddles a corner portion sandwiched between two surfaces on a material to be processed, it is possible to stably form a pierced earring. Can be done.

It is a block diagram which shows the whole structure of the laser processing system which concerns on one Embodiment of this invention. The material to be machined by the laser machining system of FIG. 1 is shown, (a) is an end face plan view of a square pipe, and (b) is an end face plan view of a long square pipe. The material to be processed by the laser processing system of FIG. 1 is shown, (a) is an end face plan view of lightweight angle steel, (b) is an end face plan view of lightweight unequal side angle steel, and (c) is an end face of lightweight channel steel. The plan view, (d) is the end face plan view of the lip channel steel. It is a perspective view of the square pipe of FIG. 2A in which a hole straddling a corner portion is formed. It is a development view of the square pipe of FIG. It is explanatory drawing in the case of irradiating the corner portion of the square pipe of FIG. 5 with a laser beam from the laser head of the laser processing machine of FIG. It is a developed view which shows the setting example of the position which forms the pierced earrings at the time of forming a hole and a notch straddling a corner portion in the lightweight channel steel of FIG. 3C. The material to be machined by the laser machining system of FIG. 1 is shown, (a) is an end face plan view of angle steel, (b) is an end face plan view of unequal side angle steel, and (c) is an end face plan view of channel steel. is there. It is explanatory drawing in the case of moving the pierced earring formation position set in the corner portion of the square pipe of FIG. 4 to the outside of the corner portion by changing the machining start point of the hole. It is explanatory drawing in the case of moving the pierced earring formation position set in the corner portion of the square pipe of FIG. 4 to the outside of the corner portion by shortening the length of the approach. It is explanatory drawing in the case of moving the formation position of the pierced earring set in the corner part of the square pipe of FIG. 4 to the outside of the corner part by changing the direction of the approach. It is explanatory drawing which shows the state which the pierced earring formed in the square pipe of FIG. 4 interfere with the peripheral part of a hole. It is explanatory drawing which shows the state which the pierced earrings formed in the square pipe of FIG. 4 interfere with the adjacent component. It is displayed on the display of the allocation data creation device in FIG. 1 to set the priority of the indirect redefinition method applied when moving the formation position of the pierced earrings assigned to the corner or the position where interference occurs. It is explanatory drawing of an image. It is a flowchart which shows the processing procedure of the interference check which the allocation data creation apparatus of FIG. 1 executes based on a program. It is a flowchart which shows the specific processing procedure of the avoidance processing of FIG. 15 which the allocation data creation apparatus of FIG. 1 executes based on a program. It is explanatory drawing in the case that the formation position of the pierced earring set in the corner portion of the square pipe of FIG. 4 cannot be moved to the outside of the corner portion by shortening the length of the approach. It is explanatory drawing in the case of moving the pierced earring formation position set in the corner portion of the square pipe of FIG. 4 to the outside of the corner portion by extending the length of the approach. It is explanatory drawing which shows an example of the extension method of the approach when moving the pierced earring formation position of FIG. 4 from the corner part of a square pipe to the outside. It is explanatory drawing which shows another example of the extension method of the approach at the time of moving the formation position of the pierced earring of FIG. 4 from the corner part of a square pipe to the outside. It is explanatory drawing which shows another example of the extension method of the approach at the time of moving the formation position of the pierced earring of FIG. 4 from the corner part of a square pipe to the outside. The procedure of the process of moving the piercing formation position from the corner portion of the square pipe of FIG. 4 to the outside by the extension of the approach is shown, (a) is an explanatory view of the approach extension procedure in the first process, and (b) is. It is explanatory drawing of the approach extension procedure in the 2nd processing. It is a flowchart which shows an example of the procedure of the laser processing position determination method executed in the CAM apparatus of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same or equivalent parts or components are designated by the same reference numerals throughout the drawings.

The embodiments shown below exemplify an apparatus or the like for embodying the technical idea of the present invention. The technical idea of the present invention does not specify the material, shape, structure, arrangement, function, etc. of each component to the following.

FIG. 1 is a block diagram showing an overall configuration of a laser processing system according to an embodiment of the present invention. The laser processing system of the present embodiment shown in FIG. 1 includes a CAD device 10, a CAM device 20, an NC device 30, and a laser machining machine 40.

The CAD device 10 creates shape data of a product to be generated by processing a steel material and holds it in a recording medium. That is, the CAD device 10 includes the product shape data creation unit 11. The CAD device 10 can realize the function of the product shape data creation unit 11 by executing a computer program. The product shape data creation unit 11 can create the product shape data as a three-dimensional (3D) CAD model.

Further, the CAD device 10 creates drawing data in which the steel material to be a product after processing is developed in a plane shape based on the product shape data. The drawing data created by the CAD apparatus 10 may be, for example, data of a development view of the steel material, or data of a three-view drawing including each of the plane, side surface, and front views of the steel material. In the present embodiment, a case where the CAD device 10 creates development drawing data as drawing data of a steel material will be described. The development drawing data created by the CAD device 10 will be described later. The product shape data and the development drawing data created by the CAD device 10 are output from the CAD device 10 and input to the CAM device 20 in response to a request from the CAM device 20, for example.

The CAM device 20 reads the product shape data and the development drawing data input from the CAD device 10. Then, based on the read product shape data and development drawing data, the processing range and processing order for processing the steel material into the product shape indicated by the product shape data are determined. That is, the CAM device 20 includes a machining range / machining order determination unit 21. The CAM device 20 can realize the function of the machining range / machining order determination unit 21 by executing a computer program.

When the machining range / machining order determination unit 21 determines the machining range and machining order for the steel material, the CAM device 20 generates allocation data indicating how the steel material is machined by the laser beam. The processing allocation represents the trajectory of processing by the laser beam. The allocation data includes information on the order of the plurality of allocations. That is, the CAM device 20 includes the allocation data creation device 22. The CAM device 20 can realize the function of the allocation data creation device 22 by executing a computer program.

The CAM device 20 generates a machining program for machining a steel material based on the allocation data. The machining program is NC data which is a machine control code. The CAM device 20 constitutes a laser machining program creating device according to an embodiment of the present invention. The CAM device 20 transfers the generated machining program to the NC device 30. The NC device 30 controls the machining of the steel material in the laser machining machine 40 based on the machining program.

The CAD device 10 and the CAM device 20 may be configured separately as shown in FIG. 1, or the CAD device 10 and the CAM device 20 may be integrally configured.

The development view data created by the CAM device 20 can include, for example, the development view data of the square pipe P1 and the long angle pipe P2 shown in the end face plan views of FIGS. 2A and 2B. Further, the developed view data created by the CAM device 20 is, for example, the lightweight angle steel A1, the lightweight unequal side angle steel A2, the lightweight channel steel C1, and the lip groove shown in the end face plan views of FIGS. 3 (a) to 3 (d). The development view data of the shaped steel C2 can be included. The pipes P1 and P2 of FIG. 2 and the lightweight shaped steels A1, A2, C1 and C2 of FIG. 3 all correspond to the materials to be processed. It is formed by bending a material having a predetermined plate thickness. In the pipes P1, P2 and the lightweight shaped steels A1, A2, C1 and C2, two surfaces S1 and S1 having different orientations by 90 degrees are adjacent to each other with a curved corner portion R1 in between.

In the products made of the pipes P1 and P2 of FIG. 2 and the lightweight shaped steels A1, A2, C1 and C2 of FIG. 3, holes or notches straddling the corner portion R1 may be formed. For example, in the perspective view of FIG. 4, a rectangular hole H1 straddling the corner portions R11 and R14 on both sides of one of the four surfaces S11 to S14 of the square pipe P1 having a square end surface S11. The product PD1 that formed the above is shown.

When the product PD1 is manufactured using the laser processing machine 40, the product shape data of the product PD1 created by the product shape data creation unit 11 of FIG. 1 is input from the CAD device 10 to the CAM device 20. Then, the development view data of the square pipe P1 forming the hole H1 is created by the CAM device 20. The created development drawing data is stored in the drawing data storage unit of the CAM device 20. The drawing data storage unit can be configured by, for example, a non-volatile memory built in the CAM device 20.

FIG. 5 is a development view AD1 of the square pipe P1 shown by the development view data. On the developed view AD1, the surfaces S11 to S14 of the square pipe P1 and the corner portions R11 to R14 developed in a plane shape are alternately arranged in the vertical direction. The hole H1 of the square pipe P1 straddles the surface S11 and the corner portions R11 and R14 located above and below the surface S11, and has a rectangular shape having a long vertical direction. The portions R11 to R14 of the corner portions R11 to R14 developed in a plane on the developed view AD1 correspond to the area in the claim.

When the hole H1 is formed in the square pipe P1 by the laser machining machine 40, in order to cut off the inner part of the hole H1 from the square pipe P1 by laser processing, the inner part of the hole H1 before being cut off from the square pipe P1 is formed. , Pierce PI1 and approach AP1 are formed. The piercing PI1 is formed so as to penetrate the square pipe P1 in the direction of the plate thickness in order to start the laser machining. The approach AP1 is formed to linearly cut the square pipe P1 with a laser beam over a predetermined length from the pierced earring PI1 to the machining start point HS1 of the hole H1. For the formation of the piercing PI1 and the approach AP1, it is common to use a laser beam during the period from the start-up of the laser processing machine 40 to the stabilization of the output.

The development view data of the square pipe P1 created by the CAM device 20 determines the machining range and machining order of the square pipe P1 when forming the pierced earrings PI1, the approach AP1 and the hole H1 in the square pipe P1. 21 is used to determine. The machining range determined by the machining range / machining order determination unit 21 includes, for example, setting the machining range of the square pipe P1 when forming the hole H1 to the surface S11 and the corner portions R11 and R14. Further, the machining order determined by the machining range / machining order determination unit 21 includes, for example, performing laser machining on the square pipe P1 in the order of the piercing PI1, the approach AP1 and the hole H1.

For the machining range and machining order of the square pipe P1 determined by the machining range / machining order determination unit 21, the allocation data for forming the piercing PI1, the approach AP1 and the hole H1 on the square pipe P1 by the laser machining machine 40 is created. Used by device 22 to create. The allocation data created by the allocation data creation device 22 includes, for example, data on the movement trajectory of the laser beam passing through the machining start point HS1 when laser machining is performed in the order of the piercing PI1, the approach AP1, and the hole H1.

Here, the direction of the approach AP1 with respect to the hole H1 is the default direction registered in the CAM device 20 corresponding to the shape of the hole H1 when the shape of the hole H1 corresponds to the standard shape registered in the CAM device 20 in advance. Set. For example, the default direction of the approach AP1 with respect to the vertically elongated rectangular hole H1 shown in FIG. 5 can be upward.

When the direction of the approach AP1 is upward, the approach AP1 eventually reaches the upper side of the hole H1. Therefore, the position of the machining start point HS1 of the hole H1 in the allocation data created by the allocation data creation device 22 is inevitably set on the upper side of the hole H1. Then, in the allocation data, the position of the pierced earring PI1 is defined with reference to the machining start point HS1. Specifically, in the development view AD1 of the square pipe P1, the position of the piercing PI1 is defined at a position on the vertical line of the upper side lowered from the machining start point HS1 to the inside of the hole H1 at a certain distance from the machining start point HS1. Will be done.

The length of the approach AP1 connecting the machining start point HS1 and the piercing PI1 is, for example, the period required for the output of the laser machining machine 40 to stabilize and the laser machining machine of the laser head 41 shown in the explanatory view of FIG. It can be determined in consideration of the moving speed of 40.

As described above, in the allocation data, the position of the pierced earring PI1 is located at a position separated from the machining start point HS1 on the upper side of the hole H1 straddling the corner portion R11 of the square pipe P1 by the length of the approach AP1 inside the hole H1. Is defined. Therefore, the pierced earring PI1 may be assigned to a position on the corner portion R11.

When the pierced earring PI1 is formed on the corner portion R11 of the square pipe P1 formed by the curved surface formed by bending, the rotation of the square pipe P1 by the laser processing machine 40 is performed as shown in the explanatory view of FIG. The corner portion R11 is stopped at an angle facing the laser head 41. Then, the laser beam and the assist gas are irradiated from the laser head 41 toward the corner portion R11.

However, the corner portion R11 is a flat surface on the developed view AD1 of FIG. 5, but is a curved surface on the actual square pipe P1. Therefore, as shown in FIG. 6, a part of the laser beam and the assist gas irradiated toward the corner portion R11 is reflected by the surface of the corner portion R11 and is along the two surfaces S11 and S14 connected to the corner portion R11. Is distributed. Therefore, the laser beam is not irradiated with sufficient intensity in the penetrating direction of the pierced earring PI1 of the corner portion R11. Therefore, it becomes difficult to stably form the pierced earring PI1 in the corner portion R11.

Further, it is quite difficult for the rotation mechanism of the square pipe P1 to accurately stop the rotation of the square pipe P1 at an angle at which the corner portion R11 faces the laser head 41. This also causes the laser beam to be not irradiated with sufficient intensity in the penetrating direction of the pierced earring PI1 of the corner portion R11, which makes it difficult to stably form the pierced earring in the corner portion R11.

As described above, it is difficult to stably form the pierced earrings at the corner portion R11 of the square pipe P1 where the irradiation position of the laser beam is difficult to determine.

In the allocation data, the possibility that the piercing is allocated to the position on the corner portion R1 is not limited to the square pipe P1, the long-angle pipe P2 in FIG. 2 (b), or the long-angle pipe P2 in FIGS. 3 (a) to 3 (d). It is also found in the lightweight angle steel A1, the lightweight unequal edge angle steel A2, the lightweight channel steel C1, and the lip channel steel C2.

FIG. 7 is a developed view of the lightweight channel steel C1 of FIG. 3 (c), which is shown by the developed view data created by the CAM device 20. In the development view AD2 of the lightweight channel steel C1, flanges F11 and F12 adjacent to the web W11 are arranged above and below the web W11 with the corner portions R21 and R22 developed in a plane sandwiched therein. On both end faces of the lightweight channel steel C1, outer shapes O1 and O2 straddling the two corner portions R21 and R22 are formed, respectively.

When the outer shapes O1 and O2 are formed on the lightweight channel steel C1 by the laser machining machine 40, the unnecessary parts generated by the formation of the outer shapes O1 and O2 are cut off from the lightweight channel steel C1. Piercings and approaches are formed. At this time, in the allocation data created by the allocation data creation device 22, the position of the pierced earring is defined with reference to the machining start points of the outer shapes O1 and O2 straddling the corner portions R21 and R22. Therefore, in the allocation data, the pierced earrings PI2 and PI3 corresponding to the outer shapes O1 and O2 may be allocated to the positions on the corner portions R21 and R22.

Further, notches N11 and N12 are formed on the flanges F11 and F12 of the lightweight channel steel C1 in the developed view AD2, respectively. Further, holes H21 and H22 are formed in the web W11 of the lightweight channel steel C1. Even when these are formed on the lightweight channel steel C1 by the laser machining machine 40, unnecessary parts generated by forming the notches N11, N12 or holes H21, H22 are cut off from the lightweight channel steel C1, so that they are unnecessary before being cut off. Piercings and approaches are formed on the parts.

At this time, in the allocation data created by the allocation data creation device 22, the position of the pierced earring is defined with reference to the machining start points of the notches N11 and N12 and the holes H21 and H22. Therefore, the pierced earrings PI4 and PI5 corresponding to the notch N11 straddling the corner portion R21 and the hole H22 straddling the corner portions R21 and R22 are on the corner portions R21 and R22 in the allocation data as shown in FIG. May be assigned to the position of.

The corner portions R21 and R22 of the lightweight channel steel C1 are formed of curved surfaces formed by bending, similarly to the corner portions R1 of the square pipe P1. Therefore, as in the case of forming the pierced earrings PI1 on the corner portion R1 of the square pipe P1, the pierced earrings PI2 to PI5 corresponding to the outer shapes O1, O2, the notch N11, and the hole H22 are stable on the corner portions R21 and R22, respectively. It is difficult to form.

Even when a processed portion such as a hole, a notch, or an outer shape straddling a corner portion is formed on the shaped steel formed by rolling or the like, the piercing for that purpose is used in the allocation data created by the allocation data creation device 22. It may be assigned to a position on the corner of the shaped steel. This may be the case with shaped steel for the same reasons as pipe or lightweight shaped steel.

Here, the shaped steel formed by rolling or the like has an edge unlike the curved corner portions R1 of the pipes P1 and P2 of FIG. 2 and the lightweight shaped steels A1, A2, C1 and C2 of FIG. 3 formed by bending. It has a standing corner section. For example, in the angle steel A3, the unequal side angle steel A4, and the channel steel C3 shown in the end face plan views of FIGS. Two different surfaces S2 and S2 are adjacent to each other. These shaped steels A3, A4, and C3 also correspond to the materials to be processed.

Even in the case of shaped steels A3, A4, and C3 in which the corner portion R2 is not a curved surface but has a raised edge, let's rotate the shaped steels A3, A4, and C3 with the laser machining machine 40 to form piercings on the corner portion R2 by laser processing. Then, the piercing cannot be formed stably. The cause is that it is difficult to determine the irradiation position of the laser beam at the corner portion R2 of the shaped steels A3, A4, C3 as in the case of the pipes P1, P2 of FIG. 2 and the lightweight shaped steels A1, A2, C1, C2 of FIG. Because.

In particular, the corner portion R2 of the sharp-edged shaped steels A3, A4, and C3 is more laser than the corner portion R1 of the pipes P1, P2 and the lightweight shaped steels A1, A2, C1, and C2 during rotation by the laser machining machine 40. The period facing the head 41 is short. Therefore, the rotation mechanism of the shaped steels A3, A4, and C3 accurately stops the rotation of the shaped steels A3, A4, and C3 at the angle at which the corner portion R2 faces the laser head 41. It's even more difficult than facing 41.

Therefore, regardless of the pipes P1, P2, lightweight shaped steels A1, A2, C1, C2, and shaped steels A3, A4, C3, when the piercing is assigned to the position on the corner portion of the steel material in the allocation data, the allocation is performed. The data creation device 22 performs a process of redefining the position of the piercing. Hereinafter, a case where the position of the pierced earring PI1 assigned to the corner portion R1 of the square pipe P1 shown in FIG. 5 is redefined will be described.

As described above, it is the length of the machining start point HS1 of the hole H1 and the approach AP1 that is related to defining the position of the piercing PI1 in the allocation data. Therefore, as a method of redefining the position of the piercing PI1 assigned to the corner portion R1, the position of the piercing PI1 is indirectly redefined by changing the length of the machining start point HS1 of the hole H1 or the approach AP1. A redefinition method can be considered.

In the explanatory view of FIG. 9, the machining start point HS1 of FIG. 5 is changed from the position on the upper side of the hole H1 to the position not straddling the corner portions R11 and R14 on the right side of the hole H1 to pierce. The case where the position of PI1 is redefined is shown. Due to the change of the machining start point HS1, the direction of the approach AP1 with respect to the hole H1 inevitably changes to the right toward the right side of the hole H1. Therefore, this method of changing the machining start point HS1 of the hole H1 to redefine the position of the piercing PI1 can be considered as a method of redefining the position of the piercing PI1 by changing the direction of the approach AP1 with respect to the hole H1. ..

Even if the machining start point HS1 is shifted on the upper side of the hole H1, the pierced earring PI1 is arranged on the corner portion R14. However, if the machining start point HS1 is changed from the upper side of the hole H1 to a position that does not straddle the corner portions R11 and R14 on the right side and the position of the pierced earring PI1 is redefined, the corner portions R11 and R14 are redefined in the allocation data. The pierced earring PI1 can be assigned to a position deviated from.

In FIG. 9, the machining start point HS1 is arranged on the right side of the hole H1 and the direction of the approach AP1 to the hole H1 is set to the right, but the machining start point HS1 is arranged on the left side of the hole H1 to approach the hole H1. The direction of AP1 may be the left direction.

Further, the change of the machining start point HS1 of the hole H1, that is, the change of the direction of the approach AP1 is such that, for example, the shape of the hole H1 set for the CAM device 20 is changed to a standard shape registered in advance, that is, a vertically long shape. It can be executed by changing from a rectangular shape to an atypical shape. The atypical shape can be set, for example, by inputting vertical and horizontal dimensional information of the hole H1.

Next, the explanatory view of FIG. 10 shows a case where the length of the approach AP1 of FIG. 5 is shortened and the position of the pierced earring PI1 is redefined. This redefinition method is effective when the hole H1 of the square pipe P1 extends beyond the corner portion R14 to the surface S14. That is, when the approach AP1 is shortened to an appropriate length and the position of the pierced earring PI1 is redefined, the position of the pierced earring PI1 after the redefinition is closer to the upper side of the hole H1 than the position initially defined in the allocation data. .. Therefore, the position of the pierced earring PI1 can be moved to a position closer to the upper side of the hole H1, and the pierced earring PI1 can be allocated in the surface S14 off the corner portion R14 in the allocation data.

The method of shortening the length of the approach AP1 and redefining the position of the piercing PI1 is that the hole H1 extends beyond the corner portion R11 to the surface S12 even when the approach AP1 is oriented downward with respect to the hole H1. If so, it can be applied. That is, the pierced earrings PI1 can be arranged in the surface S12 off the corner portion R11 by shortening the approach AP1 as in the case where the approach AP1 is oriented upward.

As described above, when the length of the approach AP1 is shortened, the position of the redefined pierced earring PI1 is closer to the side where the machining start point HS1 of the hole H1 exists than the position initially defined in the allocation data. The same thing is not only shortening the length of the approach AP1, but also changing the direction in which the approach AP1 extends from the machining start point HS1 to the inside of the hole H1, that is, the approach from the machining start point HS1 to the piercing PI1 by the approach AP1. It can also be realized by changing the angle.

The explanatory view of FIG. 11 shows a case where the position of the pierced earring PI1 is redefined by changing the extending direction of the approach AP1 from the machining start point HS1 to the inside of the hole H1. In FIG. 11, the approach AP1 in the extending direction intersecting the upper side of the hole H1 at an acute angle is shown by a solid line, and the approach AP1 in the extending direction intersecting the upper side of the hole H1 at an obtuse angle is shown by a broken line.

This redefinition method is also effective when the hole H1 of the square pipe P1 extends beyond the corner portion R14 to the surface S14, as in the redefinition method of FIG. 10 for shortening the length of the approach AP1. is there.

That is, in this redefinition method, as shown in FIG. 11, the extension direction of the approach AP1 with respect to the upper side of the hole H1 where the machining start point HS1 exists is changed from the direction orthogonal to the upper side to the direction intersecting an acute angle or an obtuse angle. .. Then, the position of the pierced earring PI1 after the redefinition is closer to the upper side of the hole H1 than the position initially defined in the allocation data. Therefore, the position of the pierced earring PI1 can be moved to a position closer to the upper side of the hole H1, and the pierced earring PI1 can be allocated in the surface S14 off the corner portion R14 in the allocation data.

The method of redefining the position of the pierced earring PI1 by changing the extending direction of the approach AP1 is such that the hole H1 extends beyond the corner portion R11 to the surface S12 even when the direction of the approach AP1 with respect to the hole H1 is downward. If so, it can be applied. That is, the pierced earrings PI1 can be arranged in the surface S12 off the corner portion R11 by changing the extending direction of the approach AP1 as in the case where the approach AP1 is oriented upward.

The above-mentioned indirect redefinition method of the position of the pierced earrings PI1 may be executed for the purpose of avoiding the interference when the position of the pierced earrings PI1 assigned to the corner portions R11 and R14 is the position where the interference occurs. it can.

Here, the interference means that the position of the pierced earring PI1 allocated in the allocation data is outside the hole H1 and remains on the surface S11 of the product even after the hole H1 is formed.

For example, in the explanatory view of FIG. 12, the pierced earring PI31 formed at the position on the surface S31 allocated in the allocation data is placed on the surface S31 of the product PD31 after the hole H31 straddling the surface S31 and the corner portion R31 is formed. It shows the case where it remains. Reference numerals AP31 and HS31 in FIG. 12 indicate the approach and the machining start point of the hole H31, respectively.

The same thing can be done, for example, when the product PD41 is formed with an outer shape O41 straddling the corner portion R41 and the adjacent surfaces S41 and S42 with the corner portion R41 interposed therebetween, as shown in the explanatory view of FIG. Can also happen. FIG. 13 shows a case where the machining start point OS41 of the outer shape O41 of the product PD41 is set to the side on the boundary between the corner portion R41 and the surface S42 in the allocation data. Further, FIG. 13 also shows a case where the machining start point OS42 of the outer shape O42 of the product PD41 is set to the side on the boundary between the corner portion R41 and the surface S41 in the allocation data.

As shown in FIG. 13, when the allocated pierced earrings PI41 is formed at the position on the surface S41 defined with reference to the machining start point NS41 in the allocation data, the pierced earrings PI41 formed for the product PD41 is created from the same steel material. May remain on the next product PD42. Similarly, when the allocated pierced earring PI42 is formed at the position on the surface S42 defined with respect to the machining start point NS42, the pierced earring PI42 formed for the product PD41 remains on the adjacent product PD43 made from the same steel material. In some cases.

Although not shown, if the pierced earrings are formed at the positions allocated in the allocation data even when the outer shape straddling the surface and the corner portion is formed on the product, the product itself or the adjacent steel material created from the same steel material can be used next to it. The formed pierced earrings may remain on the product.

Therefore, the allocation data creation device 22 positions the positions of the pierced earrings PI31, PI41, and PI42 assigned to the positions on the surfaces S31 and S41 that cause interference by executing the above-mentioned indirect redefinition method to avoid interference. May be redefined as.

When the positions of the pierced earrings PI1 of the corner portions R11 and R14 or the pierced earrings PI31, PI41, and PI42 at the positions where interference occurs are redefined to different positions by an indirect redefinition method, the three positions of FIGS. 9 to 11 The redefinition method may be applied in descending order of priority. The priority of the redefinition method to be applied can be set, for example, on the image 22S displayed on the display unit of the allocation data creation device 22 shown in the explanatory diagram of FIG. In addition, the parameters in each redefinition method can also be set on this image.

For example, in FIG. 14, the priority of the redefinition method to be applied is No. 1 for changing the direction of the approach AP1 with respect to the hole H1 in FIG. 9, No. 2 for shortening the length of the approach AP1 in FIG. 10, and No. 2 for the approach AP1 in FIG. It shows the case where the change of the approach angle by is set to No. 3. In the example shown in FIG. 14, the priority of the redefinition method can be set up to at least 4. As shown in FIG. 14, when the priority of "do nothing" is set, only the redefinition method having a higher priority than "do nothing" is executed in the avoidance process.

Further, FIG. 14 shows a case where the minimum value of the length of the approach AP1 of FIG. 10 is set to 2.0 mm and the maximum value of the approach angle of FIG. 11 is set to ± 60 °.

The allocation data creation device 22 has a built-in non-volatile process of redefining the positions of the pierced earrings PI1 of the corner portions R11 and R14 or the pierced earrings PI31, PI41, and PI42 at the position where interference occurs to another position by an indirect redefinition method. Execute according to the program in non-volatile memory. FIG. 15 is a flowchart showing a processing procedure of interference check performed by the allocation data creation device 22 according to this program.

The allocation data creation device 22 first confirms whether or not the processing allocation content shown in the generated allocation data is the processing of the outer shape (step S1). If the outer shape is machined (YES in step S1), the process shifts to step S5 described later, and if the outer shape is not machined (NO in step S1), the allocation data creation device 22 has a hole in the processing allocation content. Alternatively, it is confirmed whether or not the notch is machined (step S3). If the hole or notch is not machined (NO in step S3), the series of processes is completed. Further, in the case of processing a hole or a notch, the process shifts to step S7 described later.

In step S5, the allocation data creation device 22 confirms whether or not the position of the pierced earring allocated by the allocation data is a position that does not interfere with another product manufactured from the same material, that is, an adjacent component. If the position does not interfere with the adjacent component (NO in step S5), the process proceeds to step S11 described later. If the position does not interfere with the adjacent component (YES in step S5), the process proceeds to step S7.

In step S7, the allocation data creation device 22 confirms whether or not the position of the pierced earring allocated by the allocation data is a position without self-interference. The position of the pierced earring is a position where there is no self-interference, which means that the position of the pierced earring is not a position remaining in the processed product of the outer shape confirmed in step S1. If the position is not free of self-interference (NO in step S7), the process proceeds to step S11.

If the position is such that there is no self-interference (YES in step S7), the allocation data creation device 22 determines whether or not the machining start point of the outer shape confirmed in step S1 does not exist in the corner portion of the material forming the outer shape. (Step S9). If the machining start point does not exist in the corner portion of the material (YES in step S9), the series of processes is terminated. If the machining start point exists in the corner portion of the material (NO in step S9), the process shifts to step S11.

In step S11, the allocation data creation device 22 performs the avoidance process. In the avoidance processing, in the allocation data, the positions of the pierced earrings PI1 of the corner portions R11 and R14 or the pierced earrings PI31, PI41 and PI42 at the position where the interference occurs are defined by an indirect redefinition method, and the corner portions R11, R14 or the position where the interference occurs. This is the process of redefining to a position other than. FIG. 16 is a flowchart showing a specific processing procedure of the avoidance processing performed by the allocation data creating device 22.

The allocation data creation device 22 confirms whether or not the first priority of the redefinition method to be applied is "do not process anything" (step S21). If the first priority is "do not process anything" (NO in step S21), the process shifts to step S39, which will be described later. If the first priority is not "do not process anything" (YES in step S21), the allocation data creation device 22 uses the redefinition method of the first priority to redefine the corners R11, R14 and interference. It is confirmed whether the position piercings PI1, PI31, PI41, and PI42 can be eliminated (step S23).

If the corner portions R11, R14 and the piercings PI1, PI31, PI41, and PI42 at the interference position can be eliminated by the redefinition method having the highest priority (NO in step S23), the allocation data creation device 22 redefines the corners. The method is executed (step S25). Then, a series of processes is completed. On the other hand, in the redefinition method having the highest priority, if the corner portions R11, R14 and the piercings PI1, PI31, PI41, and PI42 at the interference positions cannot be eliminated (YES in step S23), the process shifts to step S27 described later. To do.

In step S27, the allocation data creation device 22 confirms whether or not the second priority of the redefinition method to be applied is "do not process anything". If the second priority is "do not process anything" (NO in step S27), the process shifts to step S39. If the second priority is not "do not process anything" (YES in step S27), the allocation data creation device 22 uses the redefinition method of the second priority to redefine the corners R11, R14 and the interference. It is confirmed whether the position piercings PI1, PI31, PI41, and PI42 can be eliminated (step S29).

If the corner portions R11, R14 and the piercings PI1, PI31, PI41, and PI42 at the interference position can be eliminated by the redefinition method having the second priority (NO in step S29), the allocation data creation device 22 redefines the corners. The method is executed (step S31). Then, a series of processes is completed. On the other hand, in the redefinition method having the second priority, if the corner portions R11, R14 and the piercings PI1, PI31, PI41, and PI42 at the interference position cannot be eliminated (NO in step S29), the process shifts to step S33 described later. To do.

In step S33, the allocation data creation device 22 confirms whether or not the third priority of the redefinition method to be applied is "do not process anything". If the third priority is "do not process anything" (NO in step S33), the process shifts to step S39. If the third priority is not "do not process anything" (YES in step S33), the allocation data creation device 22 uses the redefinition method of the third priority to redefine the corners R11, R14 and the interference. It is confirmed whether the position piercings PI1, PI31, PI41, and PI42 can be eliminated (step S35).

If the corner portions R11, R14 and the piercings PI1, PI31, PI41, and PI42 at the interference position can be eliminated by the redefinition method having the third priority (NO in step S35), the allocation data creation device 22 redefines the corners. The method is executed (step S37). Then, a series of processes is completed. On the other hand, in the redefinition method having the third priority, if the corner portions R11, R14 and the piercings PI1, PI31, PI41, and PI42 at the interference positions cannot be eliminated (NO in step S35), a series of processes is terminated.

In step S39, even if the allocation data creation device 22 applies the redefinition method in the set priority order, the corner portions R11, R14 and the pierced earrings PI1, PI31, PI41, and PI42 at the interference positions are moved to other positions. Notify that it cannot be redefined. This notification can be performed, for example, by a warning display on the display unit of the CAM device 20.

The indirect redefinition method of FIGS. 9 to 11 described above is when the piercing PI1 and the approach AP1 are formed by using the laser beam during the period from the start-up of the laser machining machine 40 to the stabilization of the output. It is especially effective when adopted. That is, when the position of the pierced earring PI1 is redefined by each method of FIGS. 9 to 11, the length of the approach AP1 is shortened or remains the original length. Therefore, even if the position of the pierced earring PI1 is redefined, the formation of the pierced earring PI1 and the approach AP1 using the laser beam until the output becomes stable can be efficiently continued.

However, in the redefinition method of FIGS. 10 and 11, for example, as shown in the explanatory view of FIG. 17, when the hole H1 does not straddle the surfaces S12 and S14, it is defined on the corner portions R11 and R14. The position of the pierced earring PI1 cannot be redefined outside the corner portions R11 and R14. This is because the range in which the position of the pierced earring PI1 can be redefined is limited to the inner portion of the hole H1 that does not straddle the surfaces S12 and S14.

Therefore, in the redefinition method of FIGS. 10 and 11, if the position of the pierced earring PI1 on the corner portions R11 and R14 cannot be redefined outside the corner portions R11 and R14, for example, a warning display is performed on the CAM device 20. Can be considered. By this warning display, it is possible to notify the user that the pierced earrings PI1 are arranged in the corner portions R11 to R14.

Alternatively, it is conceivable that the allocation data creation device 22 redefines the position of the piercing PI1 by a method different from the indirect redefinition method described above. In addition to the indirect redefinition method described above, a direct redefinition method can be considered as a method for redefining the position of the piercing PI1.

In the method of directly redefining the position of the pierced earrings PI1, for example, as shown in the explanatory diagram of FIG. 18, in the allocation data, in the first definition, the position of the pierced earrings PI1 allocated on the corners R11 and R14 is set to the corner. Redefined to the position in the surface S11 outside the parts R11 and R14.

In the example shown in the explanatory view of FIG. 19A (a), in the allocation data created by the allocation data creation device 22, the machining start point HS51 of the vertically long rectangular hole H51 is allocated to the center of the lower side of the hole H51. .. Further, in the example of FIG. 19A (a), the piercing PI51 and the approach AP51 of the hole H51 straddling the surface S51 and the corner portion R51 below the surface S51 are allocated on the corner portion R51 in the allocation data.

In this case, the position of the pierced earring PI51 is redefined on the horizontal redefinition line RL51 that is virtually drawn on the upper side surface S51 of the hole H51 by the dimension D from the boundary between the surface S51 and the corner portion R51. To. The position of the redefined pierced earring PI51 is located on an extension of the approach AP51 towards the upper side of the hole H51, as shown in the explanatory diagram of FIG. 19A (b). With the redefinition of the position of the pierced earrings PI51, the approach AP51 is extended to a length connecting the redefined pierced earrings PI51 and the machining start point HS51, as shown in the explanatory diagram of FIG. 19A (c).

In the example shown in the explanatory view of FIG. 19B (a), the hole H51 has a recess RC51 in the lower left corner. The recess RC51 has a horizontally long rectangular shape, and in the allocation data, the machining start point HS51 is assigned to the joint point between the contour of the recess RC51 and the lower side of the hole H51. Further, in the example of FIG. 19B (a), the lower portion of the hole H51 including the recess RC51 straddles the corner portion R51. Then, the pierced earring PI51 and the approach AP51 of the hole H51 are allocated on the corner portion R51 in the allocation data.

In this case as well, the position of the pierced earring PI51 is redefined on the same redefinition line RL51 as in FIG. 19A (b). The position of the redefined pierced earrings PI51 is located on a perpendicular line from the redefined line RL51 that passes through the position of the pierced earrings PI51 on the first defined corner portion R51, as shown in the explanatory diagram of FIG. 19B (b). To. With the redefinition of the position of the pierced earrings PI51, the approach AP51 is changed to a straight line in the direction connecting the redefined pierced earrings PI51 and the machining start point HS51 as shown in the explanatory diagram of FIG. 19B (c).

In the example shown in the explanatory view of FIG. 19C (a), the machining start point HS51 of the hole H51 of FIG. 19B (a) having the recess RC51 in the lower left corner is the recess as shown in FIG. 19C (a) in the allocation data. It is assigned to the upper right corner of RC51. Further, in the example of FIG. 19C (a), the lower portion of the hole H51 including the recess RC51 straddles the corner portion R51. Then, the pierced earring PI51 and the approach AP51 of the hole H51 are allocated on the corner portion R51 in the allocation data.

Also in this case, the position of the pierced earring PI51 is redefined on the same redefinition line RL51 as in FIGS. 19A (b) and 19B (b). The position of the redefined pierced earrings PI51 is located on a perpendicular line from the redefined line RL51 that passes through the position of the pierced earrings PI51 on the first defined corner portion R51, as shown in the explanatory diagram of FIG. 19C (b). To. With the redefinition of the position of the pierced earrings PI51, the approach AP51 is changed to a straight line in the direction connecting the redefined pierced earrings PI51 and the machining start point HS51 as shown in the explanatory diagram of FIG. 19C (c).

In the above-mentioned direct redefinition method of the pierced earrings PI1 and PI51, the positions of the pierced earrings PI1 and PI51 defined in the corner portions R11, R14 and R51 in the allocation data are exclusively set to the machining start points HS1 and HS51 of the holes H1 and H51. It is redefined in a position away from. Therefore, the lengths of the approaches AP1 and AP51 are exclusively extended by redefining the positions of the pierced earrings PI1 and PI51. Therefore, by redefining the positions of the pierced earrings PI1 and PI51, the formation of the pierced earrings PI1, PI51 and the approaches AP1 and AP51 is completed and the formation of the holes H1 and H51 is started before the output of the laser beam is stabilized. Can be prevented.

In the method of directly redefining the positions of the pierced earrings PI1 and PI51, the lengths of the approaches AP1 and AP51 are exclusively extended with the redefinition. Therefore, the redefined positions of the pierced earrings PI1 and PI51 are more likely to cause interference than the indirect redefinition method of redefining the position of the pierced earrings PI1 by moving or shortening the length of the approach AP1. Become.

Therefore, after the position of the pierced earring on the corner portion is redefined outside the corner portion by the direct redefinition method, before the allocation data creation device 22 forms the pierced earring at the redefined position. It is desirable to perform an interference check.

In the explanatory view of FIG. 20A, the position of the pierced earring PI61 defined with reference to the machining start point HS61 of the hole H61 straddling the surface S61 and the corner portion R61 is defined from above the corner portion R61 by a direct redefinition method. An example of redefinition on the outer surface S61 of the corner portion R61 is shown. In this example, the position of the pierced earring PI61 redefined on the surface S61 is outside the hole H61 and remains on the surface S61 after the hole H61 is formed.

In the interference check of the pierced earrings PI61, first, it is confirmed whether or not the position of the pierced earrings PI61 redefined by the direct redefinition method is outside the hole H61. Then, when the position of the redefined piercing PI61 is outside the hole H61, from the boundary between the surface S61 and the corner portion R61 to the virtual redefinition line RL61 where the position of the piercing PI61 is redefined. Gradually reduce dimension D. Then, it is reconfirmed whether or not the position of the redefined pierced earring PI61 is outside the hole H61. By repeating the above procedure, the position of the pierced earring PI61 can be redefined at a position inside the hole H61 and on the surface S61. An upper limit may be set for the number of times the above procedure is repeated. In that case, the upper limit can be set to any number of times. Further, the pitch for reducing the dimension D when repeating the above procedure may or may not be an equal pitch.

In the explanatory view of FIG. 20B, the position of the redefined pierced earring PI61 is inside the hole H61 and at the stage where the dimension D, which was 2.0 mm at the beginning of the redefinition, is reduced to 0.1 mm. It shows the state of being on the surface S61. When the pierced earring PI61 is redefined at the position shown in FIG. 20B, the interference of the pierced earring PI61 with respect to the surface S61 can be avoided.

When the pierced earring for forming the notch or the outer shape interferes with the product itself or another product, the process of gradually bringing the position of the pierced earring closer to the machining start point of the notch or the outer shape is repeated as in the above-mentioned interference check. Therefore, the interference of the pierced earrings can be avoided.

When the allocation data by the allocation data creation device 22 is obtained through the above procedure, the CAM apparatus 20 of FIG. 1 creates a machining program based on the allocation data, and the NC apparatus 30 laser machining based on the machining program. Controls the machining of steel materials in the machine 40. As a result, a product corresponding to the product shape data created by the CAD device 10 can be manufactured through laser processing or the like of the laser processing machine 40.

Then, the CAM device 20 executes the processes from the creation of the development drawing data of the product based on the product shape data from the CAD device 10 to the creation of the machining program, so that the laser machining position determination method is executed. Hereinafter, an example of the laser machining position determination method executed by the CAM apparatus 20 of the present embodiment will be described with reference to the flowchart of FIG.

As shown in FIG. 21, the laser machining position determination method of the present embodiment includes each step (steps S41 to S45) of preparation, definition, determination, redefinition, and interference avoidance.

Of these, in the preparation step of step S41, the CAM device 20 creates, for example, the development view data of the development view AD1 of FIG. 5 in which the square pipe P1 of FIG. 4 is developed in a plane, and the square pipe P1 is used as a processing unit. This is a step to prepare for defining the machining range of the hole H1 to be formed. In this preparation step, the CAM device 20 requests the CAD device 10 to output the development drawing data. Then, the development drawing data input from the CAD device 10 in response to the request is read. Therefore, the preparation step of step S41 is also a reading step of reading the development drawing data of the development drawing AD1 created by the CAD device 10.

The CAM device 20 can define the machining range of the hole H1 formed as the machining portion in the square pipe P1 on the read development view data. The machining range of the hole H1 is a range that straddles the surface S11 of the square pipe P1 and the corner portions R11 and R14. The CAM device 20 can store the created development drawing data in, for example, a drawing data storage unit composed of a built-in non-volatile memory.

Next, the definition step of step S42 defines the positions of the pierced earrings PI1 and the approach AP1 formed in the portion cut off from the square pipe P1 when the CAM device 20 forms the hole H1 before cutting off the portion. It's a step. The CAM device 20 can define the positions of the piercing PI1 and the approach AP1 on the development view AD1 of the development view data. In this definition step, the CAM device 20 generates position definition data.

Subsequently, in the determination step of step S43, the CAM device 20 repositions the positions of the pierced earrings PI11 defined in the corner portions R11 and R14 in the development drawing data to the outside of the corner portions R11 and R14 by an indirect redefinition method. This is a step to determine whether or not it can be defined. The piercing PI11 at a position that can be redefined outside the corner portions R11 and R14 by an indirect redefinition method redefines the position by an indirect redefinition method. In the redefinition by the indirect redefinition method, the position of the piercing PI11 is redefined by shortening the approach AP1 or changing the machining start point HS1 of the hole H1.

Next, in the redefinition step of step S44, the CAM device 20 redefines the positions of the pierced earrings PI11 defined in the corners R11 and R14 in the development view data by a direct redefinition method. It is a step to redefine to the outside position. The redefinition by the direct redefinition method is performed for the pierced earrings PI11 at a position that cannot be redefined outside the corner portions R11 and R14 by the indirect redefinition method. In the redefinition by the direct redefinition method, the position of the piercing PI11 is redefined first, and the length of the approach AP1 is later changed as necessary according to the position of the redefined piercing PI11. In this redefinition step, the CAM device 20 generates position redefinition data.

Subsequently, the interference avoidance step of step S45 includes the first and second interference avoidance steps. The first interference avoidance step is another part in the product manufactured by the CAM device 20 forming a machined portion such as a hole, a notch, or an outer shape in the material of the product at the position of the piercing and the approach defined in the allocation data. This is the step of redefining the position where interference with is avoided. Further, in the second interference avoidance step, the CAM device 20 manufactures a product different from the product manufactured by forming the processed portions such as holes, notches, and outer shapes at the positions of the pierced earrings and the approach defined in the allocation data. This is a step to redefine the position where interference with the part to be used is avoided. In this redefinition step, the CAM device 20 generates the first interference avoidance data and the second interference avoidance data.

As is clear from the above description, in the present embodiment, the CAM device 20 corresponds to the position definition unit, the position redefinition unit, the determination unit, the first interference avoidance unit, and the second interference avoidance unit in the claims. There is. Further, the CAM device 20 executes the laser machining position determination method shown in the flowchart of FIG. 21 by performing processing according to the laser machining position determination program stored in the built-in non-volatile memory.

In the present embodiment described above, when the position of the piercing PI51 defined with reference to the machining start point HS51 of the hole H51 straddling the corner portion R51 is on the corner portion R51, the CAM device 20 pierces. The position of PI51 is redefined first. Here, the CAM device 20 redefines the position of the pierced earrings PI51 on the surface S51 off the corner portion R51. Then, the CAM device 20 later changes the length of the approach AP1 according to the position of the redefined pierced earring PI1. Therefore, the position of the pierced earrings PI51 allocated on the corner portion R51 can be reliably moved off the corner portion R51 onto the surface S51 on which the pierced earrings PI51 is stably formed.

In addition, the interference check is performed before the execution of the indirect redefinition method of the piercing position, and the indirect redefinition method of the piercing position assigned to the corner part is performed, and the interfering piercing avoidance process found in the interference check is performed. The configuration to be implemented also may be omitted. Further, in the laser machining position determination method shown in the flowchart of FIG. 21, the interference avoidance step in step S5 may be omitted.

10 CAD device 11 Product shape data creation unit 20 CAM device (drawing data storage unit, position definition unit, position redefinition unit, determination unit, first interference avoidance unit, second interference avoidance unit)
21 Machining range / machining order determination unit 22 Data creation device 22S Image 30 NC device 40 Laser machining machine 41 Laser head A1 Lightweight angle steel (lightweight shaped steel)
A2 Lightweight unequal edge angle steel (lightweight section steel)
A3 angle steel (section steel)
A4 Unequal side angle steel (section steel)
AP1, AP31, AP51 Approach C1 Lightweight channel steel (lightweight channel steel)
C2 Lip channel steel (lightweight section steel)
C3 channel steel (section steel)
D Dimension F11, F12 Flange H1, H21, H22, H31, H51, H61 Hole HS1, HS31, HS51, HS61 Machining start point N11, N12 Notch O1, O2, O41, O42 External shape OS41, OS42 Machining start point P1 Square pipe ( pipe)
P2 long angle pipe (pipe)
PD1, PD31, PD41-PD43 Products PI1-PI5, PI11, PI31, PI41, PI42, PI51, PI61 Pierce R1, R2, R11-R14, R21, R22, R31, R41, R51, R61 Corner part RC51 Recess RL51, RL61 Redefinition line S1, S2, S2, S11 to S14, S31, S41, S42, S51, S61 surface W11 web

Claims (12)

A shape that straddles the corner portion on a drawing in which the plurality of surfaces of a material to be processed that have a plurality of surfaces having a predetermined plate thickness and the two surfaces are adjacent to each other with the corner portion sandwiched between them in a plane shape. A preparatory step for preparing drawing data that defines the processing range of the material on which the processing portion of the above is formed, and
A pierced earring that penetrates the material in the direction of the plate thickness, which is formed before the formation of the processed portion, and a machining start point of the processed portion from the pierced portion at a portion to be cut off when the processed portion is formed on the material. The definition step of determining the position of the approach of a predetermined length for cutting the material according to the shape of the machined portion and defining each on the drawing.
In the drawing data, the position of the pierced earring defined in the area corresponding to the corner portion of the drawing is redefined outside the area, and the pierced earring position is redefined according to the redefined position of the pierced earring. Redefining steps to redefine the position of the approach,
Laser machining position determination method including. Further including a determination step of determining whether the position of the pierced earring defined in the area in the drawing data can be moved out of the area by shortening the approach or changing the machining start point. In the determination step, the position of the pierced earring is moved out of the area by shortening the approach, changing the position of the machining start point, and changing the orientation of the approach from the piercing to the machining start point. The laser processing position determination method according to claim 1, wherein when it is determined that the position cannot be determined, the positions of the pierced earring and the approach are redefined in the redefinition step. In the drawing data, when the positions of the pierced earrings and the approach interfere with other parts in the product manufactured by forming the processed portion on the material, the interference with the other parts is avoided. The laser machining position determination method according to claim 1 or 2, further comprising a first interference avoidance step of redefining each position of the piercing and the approach at a position. In the drawing data, when the positions of the pierced earrings and the approach interfere with a part of the material used for manufacturing a product different from the product manufactured by forming the processed portion, the other product. The laser according to any one of claims 1 to 3, further comprising a second interference avoidance step of redefining each position of the piercing and the approach at a position where interference with a portion used for manufacturing is avoided. Machining position determination method. On the computer
A shape that straddles the corner portion on a drawing in which the plurality of surfaces of a material to be processed that have a plurality of surfaces having a predetermined plate thickness and the two surfaces are adjacent to each other with the corner portion sandwiched between them in a plane shape. The reading step of reading the drawing data that defines the processing range of the material on which the processing part of the above is formed, and
A pierced earring that penetrates the material in the direction of the plate thickness, which is formed before the formation of the processed portion, and a machining start point of the processed portion from the pierced portion at a portion to be cut off when the processed portion is formed on the material. The definition step of determining the position of the approach of a predetermined length for cutting the material according to the shape of the machined portion and defining each on the drawing.
In the drawing data, the position of the pierced earring defined in the area corresponding to the corner portion of the drawing is redefined outside the area, and the pierced earring position is redefined according to the redefined position of the pierced earring. Redefining steps to redefine the position of the approach,
Laser machining position determination program to execute. On the computer
Further executing a determination step of determining whether or not the position of the pierced earring defined in the area in the drawing data can be moved out of the area by shortening the approach or changing the machining start point. ,
In the determination step, the position of the pierced earring is moved out of the area by shortening the approach, changing the position of the machining start point, and changing the orientation of the approach from the piercing to the machining start point. If it is determined that it cannot be done, the positions of the piercing and the approach are redefined in the redefinition step.
The laser processing position determination program according to claim 5. On the computer
In the drawing data, when the positions of the pierced earrings and the approach interfere with other parts in the product manufactured by forming the processed portion on the material, the interference with the other parts is avoided. Further performing a first interference avoidance step in which the position redefines each position of the piercing and the approach.
The laser machining position determination program according to claim 5 or 6. On the computer
In the drawing data, when the position of the pierced earring and the approach interferes with a part of the material used for manufacturing a product different from the product manufactured by forming the processed portion, the other product. A second interference avoidance step is further performed to redefine each position of the piercing and the approach at a position where interference with a part used for manufacturing is avoided.
The laser processing position determination program according to any one of claims 5 to 7. A shape that straddles the corner portion on a drawing in which the plurality of surfaces of a material to be processed that have a plurality of surfaces having a predetermined plate thickness and the two surfaces are adjacent to each other with the corner portion sandwiched between them in a plane shape. A drawing data storage unit that stores drawing data that defines the processing range of the material on which the processing unit is formed.
A pierced earring that penetrates the material in the direction of the plate thickness, which is formed before the formation of the processed portion, and a machining start point of the processed portion from the pierced portion at a portion to be cut off when the processed portion is formed on the material. The position of the approach of a predetermined length for cutting the material is determined according to the shape of the processed portion, and the position definition unit for generating the position definition data defined on the drawing, respectively.
In the drawing data, the position of the pierced earring defined in the area corresponding to the corner portion of the drawing is redefined outside the area, and the pierced earring position is redefined according to the redefined position of the pierced earring. Redefining the position of the approach The position redefinition part that generates the position redefinition data and
Laser machining program creation device equipped with. Further provided with a determination unit for determining whether or not the position of the pierced earring defined in the area in the drawing data can be moved out of the area by shortening the approach or changing the machining start point. The determination unit moves the position of the piercing out of the area by shortening the approach, changing the position of the machining start point, and changing the direction of the approach from the piercing to the machining start point. The laser processing program creation device according to claim 9, wherein when it is determined that the position redefinition unit cannot be used, the position redefinition unit generates the position redefinition data for redefining each position of the piercing and the approach. In the drawing data, when the positions of the piercing and the approach interfere with other parts of the product manufactured by forming the processed portion on the material, the interference with the other parts is avoided. The laser machining program creating apparatus according to claim 9 or 10, further comprising a first interference avoidance unit that generates first interference avoidance data for redefining each position of the piercing and the approach at a position. In the drawing data, when the positions of the piercing and the approach interfere with a part of the material used for manufacturing a product different from the product manufactured by forming the processed portion, the other product. Of claims 9 to 11, further comprising a second interference avoidance unit that generates second interference avoidance data that redefines each position of the piercing and the approach at a position where interference with a portion used for manufacturing is avoided. The laser processing program creating apparatus according to any one of the items.

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