JPH05224722A - Method and device for automatic production programming of machining path sentence of laser machining nc program - Google Patents

Abstract

PURPOSE:To produce a machining path sentence with high efficiency and high accuracy by retrieving successively the closed loop-shaped graphics out of the graphic data showing a machining shape, deciding each corresponding graphic as each machining graphic, and setting the contour of each machining graphic to the machining path. CONSTITUTION:A graphic retrieving part 17 retrieves successively the closed loop- shaped graphics out of the graphic data inputted to a graphic data input part 15. A processing path setting part 19 decides these retrieved graphics as the machining graphics respectively and sets the contour of each machining graphic to a machining path. An approach path setting part 21 sets an approach path for laser machining of each machining graphic. A machining direction setting part 23 sets the machining direction of each machining graphic. A final value setting part 25 sets the final value of the machining path for each machining graphic in accordance with the method to take out each segmented graphic. In such a constitution, the graphics can be automatically produced by a patterned procedure. Thus an accurate machining path sentence is produced in an extremely short time and with high efficiency and with no troublesome jobs required.

Description

Detailed Description of the Invention

[0001]

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

[0002]

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

An automatic programming device is known as a device for creating an NC program of this type. Generally, in order 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 the automatic programming device, and a machining graphic is manually operated by an operator from this graphic data. The machining route is instructed by the operator, and the machining route is instructed by the operator's manual operation with respect to each of the instructed machining drawings.

[0004]

In creating the machining path statement of the NC program by the automatic programming device as described above, the operator finds the machining figure one by one from the figure data, and for each machining figure. Since it is necessary to specify the machining path one by one, and therefore, in the case of machining figures with complicated shapes, especially those with many openings and holes, there are many machining figures that require the machining path to be designated.
Even when using an automatic programming device, there are many manual instructions, which is a cumbersome task, and it takes effort and time to create an NC program.

The present invention has been made by paying attention to the above-mentioned problems in the preparation of the machining path statement of the NC program by the conventional automatic programming device, and the machining path statement of the NC program is a troublesome work. It is an object of the present invention to provide a machining path statement automatic generation programming method and an automatic programming device for an NC program for laser machining which can be efficiently and accurately created without requiring a lot of time.

[0006]

According to the present invention, the above objects are obtained by sequentially retrieving closed-loop figures from the figure data indicating the machining shapes and setting each corresponding figure as each machining figure. The contour is set as a machining path, the approach path of laser machining for each machining figure and the machining direction of each machining figure are set, and the final value of the machining path is set for each machining figure according to the extraction method after cutting. This is achieved by a programming method for automatically creating a machining path statement of an NC program for laser machining.

Further, the automatic NC program for laser machining NC program according to the present invention forms a figure of closed loop shape from the figure data input section for inputting figure data showing the machining shape and the figure data inputted to the figure data input section. A graphic search unit that sequentially searches, a graphic searched by the graphic search unit as a machining pattern, a machining route setting unit that sets the contour of each machining pattern as a machining route, and an approach route of laser machining for each machining pattern. It includes an approach path setting unit for setting, a processing direction setting unit for setting the processing direction of each processing figure, and a closing price setting section for setting the closing price of the processing path according to the extraction method after cutting for each processing figure. It is characterized by being.

[0008]

According to the above construction, the processing for creating the machining path statement of the NC program for laser machining sequentially searches the closed loop shape figures from the figure data indicating the machining shape, and sets each corresponding figure as a machining figure. The contour of each machining figure is set as a machining path, the approach path of laser machining for each machining figure and the machining direction of each machining figure are set, and the machining path of each machining figure is selected according to the extraction method after cutting. The final price is set, that is, it is automatically performed in a patterned procedure.

[0009]

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

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

The automatic programming apparatus main body 1 has a CAD section 9 for creating graphic data showing a machining shape (product shape).
Then, CAD data (graphic data) a is given from the CAD unit 9 and automatic machining condition b is given, and based on this, a machining path statement (tool A laser processing route automatic creation CAM unit 11 for automatically creating a route control statement) and a tool locus data c by a processing route statement automatically created by the laser processing route automatic creation CAM unit 11 and converted to NC data d. And an NC data conversion post processor 13 for converting the data.

The laser processing route automatic creation CAM unit 11 is
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 that sequentially searches for a closed-loop shape graphic from the graphic data input to the graphic data input unit 15, and a graphic searched by the graphic search unit 17 as a processed graphic.
A machining path setting unit 19 that sets the contour of each machining figure as a machining path, an approach path setting unit 21 that sets an approach path of laser machining for each machining figure, and a machining direction setting unit that sets the machining direction of each machining figure. 23, and a closing price setting unit 25 that sets the closing price of the machining path according to the extraction method after cutting out for each machining figure. Each of these units may be configured by either a hardware configuration or a software configuration.

Next, a procedure for automatically creating a machining path statement in the method for automatically creating a machining path statement in the 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 one closed loop shape that is continuous by a straight line, a curve, and an arc, and this figure of the closed loop shape is the definition drawing.

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

Next, the approach path f of laser processing for the peripheral processed figure is automatically set (step 40). The approach route f is the approach route f from the laser processing start point.
The approach path f is required for the high-quality and high-accuracy laser processing because the laser processing start point is set at a position apart from the approach path f. The approach route f is added to the existing figure in the figure data, and it is automatically checked by the interference check between the line of the approach route f and the existing figure line so that an unnecessary cutting line does not enter the product. Is set.

Next, in the clockwise direction of the outer peripheral machining figure,
Automatically set to either counterclockwise (step 5)
0). This processing direction is set according to the automatic processing conditions parameterized by the operator.

Next, the final value of the machining path is automatically set for the outer peripheral machining figure according to the extraction method after cutting (step 60). The closing price of the machining path is determined by the take-out method after cutting out the peripheral machining figure. In this taking-out method, in this embodiment, the micro joint and the machine in which the worker takes out the cut-out work by stopping the machine. There are four types: stop, work shooter, and no removal. Micro joints are set by automatic processing conditions, and others are automatically set according to the size of cutouts. As a result, the machining path statement regarding the outer peripheral machining figure is completed.

Next, in the CAD data (graphic data),
A defined figure (a figure that becomes an opening or a hole) other than the outermost figure is searched (step 70), and if there is no defined figure in this search (negative determination in step 80), this routine ends.

On the other hand, as shown in FIG. 4, if there is a definition figure other than the outermost figure (Yes in step 80), the process returns to step 30 and steps 30 to 60 are performed for each definition figure. Repeatedly, the machining paths g and h, the approach paths i and j, the machining direction, and the final value are automatically set for each defined figure. Also in setting the approach routes i and j, each approach route is automatically set by the interference check between the line of the approach route and the existing figure 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 automatically created without requiring a troublesome work and a lot of time.

In the above, the present invention has been described in detail with respect to a specific embodiment, but the present invention is not limited to this, and various embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art.

[0023]

As can be understood from the above description, according to the automatic machining path statement programming method and the automatic programming device for the NC program for laser machining according to the present invention, the machining path statement preparation process of the NC program for laser machining is performed. However, the closed-loop figure is sequentially searched from the figure data showing the machining shape, and each corresponding figure is set as the machining figure.
The contour of each machining figure is set as a machining path, the approach path of laser machining for each machining figure and the machining direction of each machining figure are set, and the machining path of each machining figure is selected according to the extraction method after cutting. Since it is automatically performed in the patterned procedure of setting the closing price,
The machining path statement of the NC program can be created efficiently and accurately without the need for cumbersome work and a lot of time, and the creation time of the machining path statement of the NC program is greatly reduced compared to the past. Will be done.

[Brief description of drawings]

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

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

[Explanation of symbols]

 1 Automatic Programming Device Main Body 3 Display Device 5 Input Device 7 Output Device 9 CAD Unit 11 Laser Processing Route Automatic Creation CAM Unit 13 NC Data Conversion Post Processor 15 Graphic Data Input Unit 17 Graphic Search Unit 19 Processing Route Setting Unit 21 Approach Route Setting Part 23 Machining direction setting part 25 Final price setting part

Claims (2)

[Claims] 1. A closed-loop figure is sequentially searched from figure data showing a machining shape, each corresponding figure is set as a machining figure, the contour of each machining figure is set as a machining path, and laser machining of each machining figure is performed. Automatic creation of machining path statement of laser machining NC program, characterized in that an approach path and a machining direction of each machining figure are set, and a final value of the machining path is set for each machining figure in accordance with an extraction method after cutting out. Programming method. 2. A graphic data input section for inputting graphic data indicating a machining shape, a graphic search section for sequentially searching for closed-loop shapes from the graphic data input to the graphic data input section, and the graphic search section. Each searched figure is set as a processing figure, the processing path setting part that sets the contour of each processing figure as a processing path, the approach path setting part that sets the approach path of laser processing for each processing figure, and the processing of each processing figure A NC program for laser machining, comprising: a machining direction setting unit for setting a direction; and a final value setting unit for setting a final value of the machining path according to the extraction method after cutting out for each machining figure. Automatic programming device.