WO2015002233A1

WO2015002233A1 - Automatic programming device and automatic programming method for laser processing machine

Info

Publication number: WO2015002233A1
Application number: PCT/JP2014/067653
Authority: WO
Inventors: 貴浩山崎
Original assignee: 株式会社アマダ
Priority date: 2013-07-03
Filing date: 2014-07-02
Publication date: 2015-01-08
Also published as: JP5891206B2; JP2015014822A

Abstract

An automatic programming device which, in a processing system for performing cutting processing on each surface of a member to be processed having a plurality of surfaces by a laser processing machine, creates, for the laser processing machine, a processing program for performing cutting processing on a product having a shape with a height and a width that are not the same as those of the member to be processed, the automatic programming device developing the member to be processed along a development auxiliary line of the member to be processed using shape data relating to the member to be processed and shape data relating to the product, creating a development diagram having an outline showing the shape of the product, performing processing for creating, in a predetermined portion of the product, a bridge connecting the product and an end of the member to be processed, and laying out a cutting locus for the development diagram in which the bridge created on the development diagram by the processing for creating the bridge is connected to the outline.

Description

Automatic programming device and automatic programming method for laser beam machine

The present invention relates to an automatic programming device and an automatic programming method for a laser beam machine, and more particularly, automatic programming for automatically creating a machining program for cutting a product having a shape that does not match the height and width of a workpiece by the laser beam machine. The present invention relates to an apparatus and an automatic programming method.

In general, when laser processing is performed on an angle part or a U-shaped channel part having a L-shaped cross section as a product, the height and width of the part usually coincides with the height and width of the workpiece. FIG. 18 is a cross-sectional view of an angle material and a channel material as workpieces.

However, there are cases in which angle parts, etc., whose height and width do not match the workpiece height and width must be laser machined. In such cases, the specifications will be out of scope and machining data can be created with an automatic programming device. There wasn't.

Note that there was no relevant prior art document.

In the case of laser processing by conventional automatic programming, when machining an angle component with a height and width that does not match the workpiece height and width, it will be judged out of specification and processing data will be created automatically. Because it is not possible to add a bridge that connects the workpiece end face and the part at the time of modeling, it is necessary to create a model that makes the work height and width equal to the part height and width. was there.

And, in advance, the work of adding a bridge that connects the workpiece end face and the parts during modeling takes time and increases the burden on the operator.

Therefore, the present invention has been made in view of the above, and can automatically create a machining program for cutting a product having a shape that does not match the height and width of the workpiece. The purpose is to reduce the burden on workers who add bridges that connect parts.

In order to solve the above-described problems, the present invention provides a machining system that performs cutting with a laser processing machine on each surface of a workpiece having a uniform cross section having a plurality of surfaces and is elongated. An automatic programming device that creates a machining program for cutting a product having a shape that extends over all of a plurality of surfaces that do not match the length and width, with respect to the laser processing machine, the shape data of the workpiece and the product This is an automatic programming device having input means for inputting the shape data and control means for controlling the following process processes (A) to (C).

(A) Using the shape data of the workpiece to be processed and the shape data of the product, a development view having an outline showing the shape of the product, in which the workpiece is developed with a development auxiliary line of the workpiece. Creating a process;
(B) performing a process of creating a bridge connecting the product and an end of the workpiece on a predetermined portion of the product;
(C) A step of assigning a cutting locus to a development view in which the bridge created on the development view is combined with an outline by the process of creating the bridge performed in the step (B).

Another feature of the present invention is to find the element of the leftmost or rightmost maximum point in the product graphic on the upper end surface of the development view, and to find out based on a preset bridge width condition. Create a bridge from the maximum point, find the element of the leftmost or rightmost minimum point in the product graphic on the bottom surface of the development, and find it based on the bridge width condition set in advance. A process of creating a bridge from the minimum point.

Another feature of the present invention is that when a bridge is created from the found maximum or minimum point, the development length is increased by creating a bridge having a predetermined width on the left or right side from the bridge creation start point. If this happens, create a bridge on the other side.

According to another aspect of the present invention, there is provided a machining system that performs cutting with a laser processing machine on each surface of a workpiece having a plurality of surfaces and having a uniform cross section, and the shape data of the workpiece and the product A laser processing program for cutting a product having a shape extending over all of a plurality of surfaces that do not match the height and width of the workpiece, An automatic programming method created for a processing machine,
(A) The contour line that indicates the shape of the product is developed by the control means by using the shape data of the workpiece and the shape data of the product to deploy the workpiece on the development auxiliary line of the workpiece. Creating a development view having
(B) performing a process of creating a bridge connecting the product and an end of the workpiece on a predetermined portion of the product by the control unit;
(C) The step of assigning a cutting locus to a development view in which the bridge created on the development view is coupled to an outline by the control means by the process of creating the bridge performed in the step (B). It is to have.

It is explanatory drawing which shows the outline of the laser processing system which implemented this invention. It is a schematic block diagram of the automatic programming apparatus 9 shown in FIG. 4 is a flowchart showing the operation of the automatic programming device 9. It is explanatory drawing of the machining program creation operation | movement of the automatic programming apparatus. It is a flowchart which shows the operation | movement of the process of an angle in FIG. It is explanatory drawing of the machining program creation operation | movement of the automatic programming apparatus. It is explanatory drawing of the machining program creation operation | movement of the automatic programming apparatus. It is explanatory drawing of the machining program creation operation | movement of the automatic programming apparatus. It is explanatory drawing of the machining program creation operation | movement of the automatic programming apparatus. It is explanatory drawing of the machining program creation operation | movement of the automatic programming apparatus. It is explanatory drawing of the machining program creation operation | movement of the automatic programming apparatus. It is a flowchart which shows the operation | movement of the process of the channel in FIG. It is explanatory drawing of the machining program creation operation | movement of the automatic programming apparatus. It is explanatory drawing of the machining program creation operation | movement of the automatic programming apparatus. It is explanatory drawing of the machining program creation operation | movement of the automatic programming apparatus. It is explanatory drawing of the machining program creation operation | movement of the automatic programming apparatus. It is explanatory drawing of the machining program creation operation | movement of the automatic programming apparatus. It is explanatory drawing of the angle material and channel material as a to-be-processed member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory view showing an outline of a laser processing system embodying the present invention.

As shown in FIG. 1, this laser processing system 10 has an automatic programming device 9 that creates a processing program for the laser processing machine 1 using product shape data in a database (storage means) 11 and data on a workpiece to be processed. is doing.

Then, NC data based on a predetermined machining program created by the automatic programming device 9 is converted into drive data by the NC device 13 and sent to the laser beam machine 1, and the control device 2 of the laser beam machine 1 according to the drive data. Control of each part is performed, and laser processing of a workpiece (workpiece) is performed. The database 11 stores product shape data obtained by processing, data of workpieces, and the like.

Here, as shown in FIGS. 18 (a) to 18 (c), the processed member is a channel material, an angle material, an unequal side angle, and the like, which is a long and narrow processed member having a plurality of surfaces. A material is used. FIG. 18 is an explanatory diagram showing a cross-sectional shape of a workpiece.

FIG. 2 is a block diagram showing a schematic configuration of the automatic programming device 9 shown in FIG.

As shown in FIG. 2, the automatic programming device 9 is composed of a computer and has a CPU (control means) 15 to which a ROM 17 and a RAM 19 are connected. The CPU 15 further includes an input device (input device) such as a keyboard. Means) 21 and a display device 23 such as a display are connected. Further, the database 11 is connected to the CPU 15.

In the automatic programming device 9, the CPU 15 uses product shape data and workpiece data in the database 11 in accordance with an instruction from the input device 21 and uses a RAM 19 in accordance with a computer program from the ROM 17. A machining program for the laser beam machine 1 as will be described later is created.

Next, the processing operation and configuration of the laser processing machine 1 shown in FIG. 1 will be briefly described.

In FIG. 1, on the laser processing table 25 of the laser processing machine 1, one end of the workpiece 5 is engaged with and gripped by a chuck 29 and supported by a product support member 31.

Then, in a state where the workpiece 5 is fixed on the laser machining table 25, the laser beam is irradiated while moving the laser machining head 7 along the machining locus based on the control of the control device 2. It is designed to cut.

Note that drive data based on the machining nesting machining program created by the automatic programming device 9 is sent to the NC device 13 and laser machining control is performed according to the drive data.

Next, the machining program creation operation (automatic programming method) of the automatic programming device 9 shown in FIGS. 1 and 2 will be described with reference to FIGS.

FIG. 3 is a flowchart showing the operation of the automatic programming device. FIGS. 4, 6 to 11 and FIGS. 13 to 17 are explanatory diagrams of the machining program creation operation of the automatic programming device 9, and FIG. FIG. 12 is a flowchart showing the operation of the channel processing in FIG. 3.

Here, as shown in FIGS. 18 (a) to 18 (c), a description will be given of a machining program creation operation when a product is obtained by cutting a workpiece 5 including an angle member or a channel member having a corner in a cross section. To do.

3, a development view having an outline showing the shape of the product 5a in FIG. 4 is created and read based on the product shape data, the data of the workpiece, and the like.

Here, as a development view, in the case of a product 5a having a shape that spans all of a plurality of surfaces as shown in FIG. 4A, the workpiece is an angle material, and the development view as shown in FIG. 4B. Thus, the product figure 5a1 is unfolded by the unfolding auxiliary line 5b that is the boundary line between the 90-degree plane and the 180-degree plane on the outer periphery.

Next, in step 103 in FIG. 3, it is determined whether the workpiece 5 on the read development view is an angle material or a channel material.

If the workpiece 5 is an angle material, the process proceeds to step 105, where the angle is processed. If the workpiece 5 is a channel material, the process proceeds to step 107, where the channel is processed.

If the material is neither an angle material nor a channel material, the process proceeds to step 111 to assign a cutting trajectory for the pipe material.

This angle processing is processing for creating a bridge that connects the product 5a and the end of the workpiece in the angle material at a predetermined portion, and will be described with reference to the angle processing flowchart of FIG. FIG. 5 is a flowchart showing the angle processing.

In step 201 of FIG. 5, the development length L1 of the product graphic 5a1 is compared with the value obtained by adding the height H1 to the width W1 of the angle material from the outline indicating the shape of the product graphic 5a1 in the development view. It is determined whether the unfolded length L1 is smaller than the value obtained by adding the height H1 to the width W1 of the angle member.

When the development length L1 of the product graphic 5a1 is equal to the value obtained by adding the height H1 to the width W1 of the angle material, the development length L1 of the product graphic 5a1 is the angle as shown in FIG. When it is smaller than the value obtained by adding the height H1 to the width W1 of the material, it becomes as shown in FIGS. 6B and 6C.

If the development length L1 of the product graphic 5a1 is smaller than the value obtained by adding the height H1 to the width W1 of the angle material in the step 201, whether or not the development auxiliary line 5b is present on the product graphic 5a1 in the development drawing in step 203. Is determined.

That is, when there is no development auxiliary line 5b on the product figure 5a1 in the development view, it becomes as shown in FIGS. 7A and 7B, and when there is the development auxiliary line 5b on the product 5a in the development view, As shown in FIG.

Next, when there is a development auxiliary line 5b on the product graphic 5a1 in the development view in step 203, in step 205, the distance L2 from the element of the maximum point Y1 of the product graphic 5a1 to the development auxiliary line 5b is the angle material. It is determined whether or not the height is smaller than H1.

That is, when the distance L2 from the element of the maximum point Y1 of the product figure 5a1 in the development view to the development auxiliary line 5b is smaller than the height H1 of the angle material, it is as shown in FIG.

When the distance L2 from the element of the maximum point Y1 of the product figure 5a1 to the development auxiliary line 5b is smaller than the height H1 of the angle material in step 205, the 90 ° plane creation flag in the development view is turned on in step 207. When the distance L2 from the element of the maximum point Y1 of the product figure 5a1 to the development auxiliary line 5b is not smaller than the height H1 of the angle member, in step 209, the 90 ° plane creation flag in the development view is turned off.

Next, in step 211, it is determined whether or not the distance L3 from the element of the minimum point Y2 of the product figure 5a1 to the development auxiliary line 5b is smaller than the width W of the angle material.

That is, when the distance L3 from the element of the minimum point Y2 of the product figure 5a1 in the development view to the development auxiliary line 5b is smaller than the width W1 of the angle material, it is as shown in FIG.

When the distance L3 from the element of the minimum point Y2 of the product figure 5a1 to the development auxiliary line 5b is smaller than the width W1 of the angle material in step 211, in step 213, the 180 ° plane creation flag in the development view is turned on. When the distance L3 from the element of the minimum point Y2 of the product figure 5a1 to the development auxiliary line 5b is not smaller than the width W1 of the angle member, in step 215, the 180 ° plane creation flag in the development view is turned off.

It should be noted that the distance L2 from the element of the maximum point Y1 of the product figure 5a1 to the development auxiliary line 5b in the development view is smaller than the height H1 of the angle material and the development is started from the element of the minimum point Y2 of the product figure 5a1 in the development view. When the distance L3 to the auxiliary line 5b is smaller than the width W1 of the angle member, it is as shown in FIG.

Next, in step 217, it is determined whether or not the 90 ° plane creation flag in the development view is turned on. If the 90 ° plane creation flag is on, in step 219, the 90 ° plane creation view is turned on. In the product figure 5a1, the leftmost maximum point Y3 is found.

Next, in step 221, a bridge B1 is created from the found maximum point Y3 based on the condition of the bridge width W2 set in advance.

That is, as shown in FIG. 10, the maximum point Y3 is taken as a bridge creation start point, from the bridge creation point Y3 to the maximum point (upper end surface of the development view) Y4 of the development view in the vertical direction, and from the maximum point Y4 to the bridge width. (Predetermined width) Move to the right by W2, and create a bridge B1 from the moving point Y5 to the product figure 5a1.

Here, if the unfolded length increases when moving to the right by the bridge width W2, the bridge is moved to the left (opposite side) by the bridge width W2 using the right end of the unfolded view as the bridge creation start point. Create B1.

In addition, although the leftmost maximum point Y3 is set as the bridge creation start point, in the laser processing machine 1 that can be safely processed by shortening the path by a method of cutting the workpiece 5 from the left side toward the right side, It is a measure for performing safe machining with a shorter movement path.

In the case of the laser beam machine 1 that can be safely machined by cutting the workpiece 5 from the right side to the left side and can be machined safely, the maximum point on the right is the bridge creation start point.

Next, in step 223, it is determined whether or not the 180 ° plane creation flag in the development view is turned on. If the 180 ° plane creation flag is on, in step 225, the 180 ° plane creation view is turned on. In the product graphic 5a1, the leftmost minimum point Y7 is found.

Next, in Step 227, a bridge B2 is created from the found minimum point Y7 based on the condition of the bridge width W2 set in advance.

That is, as shown in FIG. 10, the minimum point Y7 is a bridge creation start point, and from the bridge creation point Y7 to the minimum point (lower end surface of the development view) Y8 of the development view in the vertical direction, and from the minimum point Y8 to the bridge width. (Predetermined width) Moves to the right by W2, and creates a bridge B2 from the moving point Y9 to the product figure 5a1.

Here, if the unfolded length increases when moving to the right by the bridge width W2, the bridge is moved to the left (opposite side) by the bridge width W2 using the right end of the unfolded view as the bridge creation start point. Create B2.

In addition, although the leftmost minimum point Y7 is set as a bridge creation start point, in the laser processing machine 1 that can be safely processed by shortening the path by a method of cutting the workpiece 5 from the left side toward the right side, It is a measure for performing safe machining with a shorter movement path.

In the case of the laser processing machine 1 that can be processed safely by cutting the path of the workpiece 5 from the right side to the left side, the minimum point on the right is the bridge creation start point.

Then, returning to step 109 in FIG. 3, the maximum point Y3 is taken as the bridge creation point, the element C1 from the bridge creation point Y3 to the maximum point Y4 in the development view vertically, and the maximum point Y4 to the right by the bridge width W2. A vertical element C2 from the movement point Y5 to the product figure 5a1, a minimum point Y7 as a bridge creation point, and an element C3 from the bridge creation point Y7 to the minimum point Y8 in the development view in the vertical direction; 11 moves from the minimum point Y8 to the right by the bridge width W2 to form a vertical element C4 from the movement point Y9 to the product graphic 5a1, and these C1 to C4 elements are combined with the elements of the product graphic 5a1 to form FIG. As shown in (a), a new product graphic is created and assigned to the new product graphic. Moreover, FIG.11 (b) is explanatory drawing which shows the product 5a which has a bridge processed according to the expanded view of Fig.11 (a).

As described above, according to the angle processing in the present embodiment, when laser processing an angle component having a height and width that do not match the height and width of the workpiece, a bridge that connects the end surface of the workpiece and the component is added. The program can be easily created automatically.

Next, in step 103 in FIG. 3, when the workpiece 5 in the developed development read is a channel material, the process proceeds to step 107, where the channel is processed.

This channel processing is processing for creating a bridge at a predetermined portion connecting the product 5a and the end of the workpiece in the channel material, and will be described with reference to the channel processing flowchart of FIG. FIG. 12 is a flowchart showing channel processing.

In step 301 of FIG. 12, the development length L1 of the product graphic 5a1 in the development view is compared with the value obtained by adding the height H1 × 2 to the width W1 of the channel material, and the development length L1 of the product graphic 5a1 is It is determined whether or not it is smaller than the value obtained by adding the height H1 × 2 to the width W1.

When the development length L1 of the product figure 5a1 is equal to the value obtained by adding the height H1 × 2 to the width W1 of the channel material, the development length L1 of the product figure 5a1 is as shown in FIG. When the width is smaller than the value obtained by adding the height H1 × 2 to the width W1 of the channel material, the results are as shown in FIGS.

When the development length L1 of the product graphic 5a1 is smaller than the value obtained by adding the height H1 × 2 to the width W1 of the channel material in the above step 301, in step 303, the development assistance having different Y coordinates on the product graphic 5a1 in the development drawing. It is determined whether there are lines 5b1 and 5b2.

That is, when there are no development auxiliary lines 5b1 and 5b2 having different Y coordinates on the product figure 5a1 in the development view, they are as shown in FIGS. 14A and 14B, and the Y coordinate is on the product figure 5a1 in the development view. When there are different deployment auxiliary lines 5b1 and 5b2, they are as shown in FIG.

Next, when there are development auxiliary lines 5b1 and 5b2 having different Y coordinates on the product graphic 5a1 in the development view in the above step 303, in step 305, the first expansion auxiliary line 5b1 from the element of the maximum point Y1 of the product graphic 5a1. It is determined whether or not the distance L2 is smaller than the height H1 of the channel material.

That is, when the distance L2 from the element of the maximum point Y1 of the product figure 5a1 in the development view to the first development auxiliary line 5b1 is smaller than the height H1 of the channel material, it is as shown in FIG.

If the distance L2 from the element of the maximum point Y1 of the product figure 5a1 to the first development auxiliary line 5b1 is smaller than the height H1 of the channel material in step 305, a 90 ° plane creation flag in the development view is obtained in step 307. Is turned on, and if the distance L2 from the element of the maximum point Y1 of the product figure 5a1 to the first development auxiliary line 5b1 is not smaller than the height H1 of the channel material, in step 309, the 90 ° plane in the development view is created. Turn off the flag.

Next, in step 311, it is determined whether or not the distance L3 from the element of the minimum point Y2 of the product figure 5a1 to the second development auxiliary line 5b2 is smaller than the height H1 of the channel material.

That is, when the distance L3 from the element of the minimum point Y2 of the product figure 5a1 in the development view to the second development auxiliary line 5b2 is smaller than the height H1 of the channel material, it is as shown in FIG.

When the distance L3 from the element of the minimum point Y2 of the product figure 5a1 to the second auxiliary auxiliary line 5b2 is smaller than the channel material height H1 in the step 311 above, in step 313, the creation flag for the 270 ° surface in the development view Is turned on, and if the distance L3 from the element of the minimum point Y2 of the product figure 5a1 to the second development auxiliary line 5b2 is not smaller than the height H1 of the channel material, in step 315, the creation of the 270 ° plane in the development view Turn off the flag.

The distance L2 from the element of the maximum point Y1 of the product figure 5a1 in the development view to the first development auxiliary line 5b1 is smaller than the height H1 of the channel material, and the minimum point Y2 of the product figure 5a1 in the development view. When the distance L3 from the element to the second auxiliary deployment line 5b2 is smaller than the height H1 of the channel material, it is as shown in FIG.

Next, in step 317, it is determined whether or not the 90 ° plane creation flag in the developed view is turned on. If the 90 ° plane creation flag is turned on, in step 319, the 90 ° plane in the developed view is turned on. In the product figure 5a1, the leftmost maximum point Y3 is found.

Next, in Step 321, a bridge B3 is created from the found maximum point Y3 based on the condition of the bridge width W2 set in advance.

That is, as shown in FIG. 17, the maximum point Y3 is set as the bridge creation start point, the bridge creation point Y3 extends in the Y axis direction to the maximum point (upper end surface of the development view) Y4 of the development view, and the bridge from the maximum point Y4. It moves rightward by a width (predetermined width) W2, and creates a bridge B3 from the moving point Y5 to the product figure 5a1.

Here, if the unfolded length increases when moving to the right by the bridge width W2, the bridge is moved to the left (opposite side) by the bridge width W2 using the right end of the unfolded view as the bridge creation start point. Create B3.

Next, in step 323, it is determined whether or not the creation flag for the 270 ° surface in the development view is on. If the creation flag for the 270 ° surface is on, in step 325, the 270 ° surface of the development view is displayed. In the product graphic 5a1, the leftmost minimum point Y7 is found.

Next, in step 327, a bridge B4 is created from the found minimum point Y7 based on the condition of the bridge width W2 set in advance.

That is, as shown in FIG. 17, the minimum point Y7 is set as a bridge creation start point, and from the bridge creation point Y7 to the minimum point (lower end surface of the development view) Y8 of the development view in the vertical direction, and from the minimum point Y8 to the bridge width. (Predetermined width) Move to the right by W2, and create a bridge B4 from the moving point Y9 to the product figure 5a1.

Here, if the unfolded length increases when moving to the right by the bridge width W2, the bridge is moved to the left (opposite side) by the bridge width W2 using the right end of the unfolded view as the bridge creation start point. Create B4.

Then, returning to step 109 in FIG. 3, the maximum point Y3 is taken as the bridge creation point, the element C1 from the bridge creation point Y3 to the maximum point Y4 in the development view vertically, and the maximum point Y4 to the right by the bridge width W2. A vertical element C2 from the movement point Y5 to the product figure 5a1, a minimum point Y7 as a bridge creation point, and an element C3 from the bridge creation point Y7 to the minimum point Y8 in the development view in the vertical direction; 11 moves to the right by the bridge width W2 from the minimum point Y8 to form a vertical element C4 from the movement point Y9 to the product graphic 5a1, and these C1 to C4 elements are combined with the elements of the product graphic 5a1. As shown in (a), a new product graphic is created and assigned to the new product graphic.

As described above, according to the channel processing in this embodiment, when laser processing is performed on a channel component having a height that does not match the workpiece height, a program that adds a bridge that connects the workpiece end surface and the component can be automatically and automatically performed. Will be able to create.

The present invention is not limited to the embodiment of the invention described above, and can be implemented in other modes by making appropriate modifications.

For example, in the above embodiment, an equilateral angle steel having an equal side in the cross section is used as a workpiece, but the present invention is not limited to this, and other angle steel such as an unequal angle iron or a cross section concave A shaped member may be used.

According to the present invention, it becomes possible to automatically create a machining program for cutting a product having a shape that does not match the height and width of the workpiece, and an operator who adds a bridge that connects the end face of the workpiece and a part during modeling Can be reduced.

Claims

In a processing system that performs cutting with a laser processing machine on each surface of a long and thin workpiece having a uniform cross section having a plurality of surfaces, all of the plurality of surfaces that do not match the height and width of the workpiece An automatic programming device for creating a machining program for cutting a product having a shape that straddles the laser beam machine,
Input means for inputting the shape data of the workpiece and the shape data of the product;
And an automatic programming device having control means for controlling the following process steps (A) to (C).
(A) Using the shape data of the workpiece to be processed and the shape data of the product, a development view having an outline showing the shape of the product, in which the workpiece is developed with a development auxiliary line of the workpiece. Creating a process;
(B) performing a process of creating a bridge connecting the product and an end of the workpiece on a predetermined portion of the product;
(C) A step of assigning a cutting locus to a development view in which the bridge created on the development view is combined with an outline by the process of creating the bridge performed in the step (B).
In the product graphic on the upper end surface of the development view, find the element of the leftmost or rightmost maximum point, and create a bridge from the found maximum point based on the preset bridge width condition. ,
Find the leftmost or rightmost minimum point element in the product graphic at the bottom of the developed view, and create a bridge from the found minimum point based on the preset bridge width condition. The automatic programming device according to claim 1, further comprising:
When creating a bridge from the found maximum or minimum point, if the unfolded length is increased by creating a bridge with a predetermined width on the left or right side from the bridge creation start point, the bridge on the opposite side The automatic programming device according to claim 2, wherein:
An input for inputting the shape data of the workpiece and the shape data of the product in a machining system that performs cutting with a laser processing machine on each surface of the workpiece having a uniform cross section having a plurality of faces. Means for creating a machining program for cutting the product having a shape extending over all of a plurality of surfaces that do not coincide with the height and width of the workpiece, for the laser beam machine. A programming method,
(A) The contour line that indicates the shape of the product is developed by the control means by using the shape data of the workpiece and the shape data of the product to deploy the workpiece on the development auxiliary line of the workpiece. Creating a development view having
(B) performing a process of creating a bridge connecting the product and an end of the workpiece on a predetermined portion of the product by the control unit;
(C) The step of assigning a cutting locus to a development view in which the bridge created on the development view is coupled to an outline by the control means by the process of creating the bridge performed in the step (B). And an automatic programming method.