JP3157893B2 - Method and program for automatically creating machining path statement of NC program for laser machining - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an automatic programming device for automatically creating a machining path statement of a laser machining NC program, and more particularly to automatically creating a machining path statement of a laser machining NC program from graphic data indicating a machining shape. And an automatic programming device.

[0002]

2. Description of the Related Art When a plate material is cut into a predetermined shape by an NC laser processing machine, the NC program needs a processing path statement for each processing figure, and the laser processing path is determined by the processing path statement.

[0003] As an apparatus for creating this kind of NC program, an automatic programming apparatus is known. 2. Description of the Related Art Conventionally, to create a machining path statement of an NC program in an automatic programming device, graphic data indicating a machining shape created by CAD or the like is input to an automatic programming device, and a machining graphic is manually operated by an operator based on the graphic data. When a machining path is instructed by a manual operation of an operator with respect to each of the designated machining drawings, the operation is performed according to the content of each instruction.

[0004]

In the preparation of the machining path statement of the NC program by the automatic programming device as described above, an operator finds each machining figure one by one using graphic data, and performs processing for each machining figure. It is necessary to indicate the processing path one by one, and therefore, for processing figures of complicated shapes, especially for those with many openings and holes, there are many processing figures for which the processing path must be specified,
Even with the use of an automatic programming device, there are many manual instructions, which is a cumbersome task, and it takes labor and time to create an NC program.

The present invention has been made by paying attention to the above-mentioned problem in the preparation of the machining path statement of the NC program by the conventional automatic programming device. An object of the present invention is to provide a method and an automatic programming device for automatically creating a machining path statement of an NC program for laser machining that can be efficiently and accurately created without requiring much time.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems. According to the first aspect of the present invention, an outermost peripheral figure of a closed loop shape is searched from graphic data indicating a processed shape. Then, a contour of the figure is automatically set as a processing path as a peripheral processing figure, an approach path of laser processing on the peripheral processing figure is automatically set outside the peripheral processing figure, and a processing direction and a final value are set. A step of sequentially searching for a figure located inside the outermost figure and having a closed loop shape, setting each figure as a processing figure, automatically setting the contour of each processing figure as a processing path, and performing laser processing on the processing path. A NC step for laser processing, comprising: a second step of automatically setting a processing approach path inside the processing path and setting a processing direction and a final value. Ming is the machining path statement automatically create programming method.

According to a second aspect of the present invention, there is provided a graphic data input section for inputting graphic data indicating a processed shape, and a graphic search section for sequentially searching for a closed loop shape graphic from the graphic data input to the graphic data input section. A processing path setting unit that sets each of the figures searched by the figure search unit as a processing figure, sets a contour of each processing figure as a processing path, and an approach path setting unit that sets an approach path of laser processing for each processing figure. A processing direction setting unit for setting a processing direction of each processing figure; and a closing value setting unit for setting a closing value of the processing path in accordance with an extraction method after cutting out each processing figure. The setting unit searches for the outermost peripheral figure of the closed loop shape, and sets an approach path to the outer peripheral processing figure in which the processing path is automatically set as the outer peripheral processing figure. Automatically set to the side, the approach path is configured to automatically set the inside of the figure with respect to the processing path of the figure of the closed loop shape located inside the shape of the outermost periphery.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 2 shows an example of an automatic programming system used for implementing a method for automatically creating a machining path statement of an NC program for laser machining according to the present invention. The automatic programming system includes an automatic programming device main body 1, a display device 3 such as a CRT connected to the automatic programming device main body 1, an input device 5 such as a keyboard and a mouse connected to the automatic programming device main body 1, and an automatic programming device. It comprises an output device 7 such as a paper tape puncher, an optical disk driver, an ID card reader / writer, and a floppy magnetic disk driver connected to the main body 1.

A main body 1 of the automatic programming device is a CAD unit 9 for creating graphic data indicating a processing shape (product shape).
And CAD data (graphic data) a from the CAD unit 9 and automatic processing conditions b. Based on the data, a machining path statement (tool A laser processing path automatic creation CAM unit 11 for automatically creating a path control statement) and tool path data c based on the processing path statement automatically created by the laser processing path automatic creation CAM unit 11 are input and converted into NC data d. And a post-processor 13 for converting NC data.

The CAM unit 11 for automatically creating a laser machining path includes:
As shown in FIG. 3, a graphic data input unit 15 for inputting CAD data (graphic data) a from the CAD unit 9;
A graphic search unit 17 for sequentially searching for a closed-loop shape graphic from the graphic data input to the graphic data input unit 15 from the outermost graphic, and a graphic searched by the graphic search unit 17 as a processed graphic. A processing path setting unit 19 for setting a contour as a processing path, and an approach path setting unit 2 for setting an approach path of laser processing for each processing figure.
1, a processing direction setting unit 23 for setting the processing direction of each processing figure, and a closing value setting unit 25 for setting the closing value of the processing path according to the extraction method after cutting out each processing figure. These units may be configured by any of a hardware configuration and a software configuration.

Next, a procedure for automatically creating a machining path statement in the method for automatically creating a machining path statement of an NC program for laser machining according to the present invention will be described with reference to FIG.

In the automatic creation of a machining path statement, a machining figure is defined as a single closed loop shape that is continuous with straight lines, curves, and arcs, and the figure of this closed loop shape is a definition drawing.

In the procedure for automatically creating a processing path statement, first, CAD data is fetched from the CAD section 11 as graphic data (step 10). The outermost figure is searched from the CAD data (graphic data) (step 2).
0), using this as the outer peripheral processing figure, the contour of the figure is automatically set in the processing path (step 30). The processing path of the outer peripheral processing figure is indicated by a symbol e in the example of FIG.

Next, as shown in FIG. 4 , the approach path f of the laser processing for the outer peripheral processing figure is outside the processing path e.
Side is automatically set (step 40). Approach path f
Is a laser processing path from the laser processing start point to the processing path e , and the approach path f is set at a position where the laser processing start point is farther from the processing path e for high quality and high precision laser processing. Required by The approach path f is automatically performed for the existing figure in the figure data.
Manner and of being added, the interference check between the line of approach path f existing graphic line, extra cutting lines in the product is automatically set not to enter.

Next, the machining direction of the outer peripheral machining figure is set to clockwise,
Selectively and automatically set to one of counterclockwise (Step 5
0). The setting of the processing direction is performed in accordance with the automatic processing conditions parameter-set by the operator.

Next, the final value of the machining path is automatically set in accordance with the extraction method after cutting out the outer peripheral machining figure (step 60). The final value of the machining path is determined by the extraction method after cutting out the outer peripheral processing figure, and in this embodiment, the micro joint and the machine in which the machine is stopped and the operator takes out the cut out material are used in this embodiment. There are four types, a stop, a work shooter, and no take-out. Micro-joints are set according to automatic processing conditions, and others are automatically set according to cut-out dimensions. This completes the processing path statement for the outer peripheral processing figure.

Next, in the CAD data (graphic data),
A definition graphic ( a figure serving as an opening or a hole) located inside the outermost graphic is searched (step 70). If there is no definition graphic in this search (negative determination in step 80), this routine ends. I do.

On the other hand, as shown in FIG. 4, if there is a definition figure located inside the outermost figure (YES at step 80), the process returns to step 30, and the process returns to step 30 for each definition figure. Step 60 is repeated to automatically set the machining paths g and h for each defined figure.
As shown in FIG. 4, approach path i, a j the processed
Automatically set inside the paths g and h, and automatically set the processing direction and the final value, respectively. Also in setting the approach paths i and j, each approach path is automatically set by checking for interference between the approach path line and the existing graphic line so that an unnecessary cutting line does not enter the product.

As a result, the machining path statement of the NC program can be efficiently and accurately created automatically without requiring cumbersome work and a lot of time.

Although the present invention has been described in detail with reference to specific embodiments, the present invention is not limited to these embodiments, and various embodiments can be made within the scope of the present invention. Some will be apparent to those skilled in the art.

[0022]

The present invention can be understood from the above description of the embodiments.
As described above, according to the method and apparatus for automatically creating a machining path statement of an NC program for laser machining according to the present invention , the creation processing of the machining path statement of the NC program for laser machining is performed in a closed loop from graphic data indicating a machining shape. Shapes are sequentially searched from the outermost figure, and each corresponding figure is set as a processing figure. The contour of each processing figure is automatically set as a processing path, and the approach path of laser processing for each processing figure and the When setting the processing direction , the processing path e is automatically added to the outermost figure.
And set the approach path f outside the above figure.
To find the figure located inside the outermost figure.
When searching, the machining paths g and h are automatically set and
The approach paths i and j are automatically set inside the figure.
It is. That is, the outermost figure is detected from the figure data.
Automatically set the approach route outside the shape when searching
When searching for a figure located inside the outermost figure
Automatically sets the approach path inside the figure.
Therefore, the approach path is abolished by laser processing.
It will be automatically set to the discarded part and it will be a product
There is no case where the approach route is set incorrectly in the part
Easily and without error in machining path statements of NC programs
It can be created.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a procedure for automatically creating a machining path statement in a method for automatically creating a machining path statement of an NC program for laser machining according to the present invention.

FIG. 2 is a block diagram showing an example of an automatic programming system used for carrying out a method for automatically creating a machining path statement of an NC program for laser machining according to the present invention.

FIG. 3 is a block diagram showing a main part of an automatic programming apparatus for an NC program for laser processing according to the present invention.

FIG. 4 is a plan view showing an example of a cut shape of a plate material by laser processing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic programming apparatus main body 3 Display device 5 Input device 7 Output device 9 CAD section 11 Laser processing path automatic creation CAM section 13 Post processor for NC data conversion 15 Graphic data input section 17 Graphic search section 19 Processing path setting section 21 Approach path setting Part 23 Processing direction setting part 25 Final value setting part

Claims (2)

(57) [Claims] 1. A closed loop based on graphic data indicating a processing shape.
The outermost figure of the shape is searched, and the outermost
The contour of the figure is automatically set to the machining path (e) and
Approach path of laser processing for peripheral processing figure
(F) is automatically set outside the outer peripheral machining figure, and
The first step of setting the working direction and the closing price, and the diagram of the outermost circumference
Searches for a closed-loop figure located inside the
Each of the figures as a processing figure, and outline the processing figure.
The processing path (g, h) is automatically set and the processing path
(G, h) laser processing approach path (i,
j) is automatically set inside the machining path (g, h).
And a second step of setting a machining direction and a final value . A method for automatically creating a machining path statement for NC programming for laser machining, comprising: 2. A graphic data input unit (15) for inputting graphic data indicating a machining shape, and the graphic data input unit (1).
5) a graphic search unit (17) for sequentially searching for figures in a closed loop shape from the graphic data input to the graphic data input to the graphic data; and processing the figures searched by the graphic search unit (17) as processed figures, and processing the contour of each processed figure. The route (e, g,
h), a machining path setting unit (19), and an approach path (f,
i, j), an approach path setting unit (21), and a processing direction setting unit (2) for setting the processing direction of each processing figure.
Bei 3), closing price setting unit for setting the closing of the machining path in accordance with the extraction method after excision for each machining shape (25), the
In the above configuration, the approach path setting unit (21) has a closed loop shape.
The outermost figure is searched and the machining path is taken as the outer figure
(E) is applied to the outer peripheral machining figure automatically set.
Automatically set the route path (f) to the outside, and
Machining path (g,
h), the approach path (i, j) is set
An automatic programming device for NC programming for laser processing, characterized in that the automatic programming device is configured to automatically set to the side .