JP2780446B2 - Electric discharge machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention makes it possible to easily perform multi-cavity machining of an arbitrary shape when machining a workpiece by an electric discharge machine, and displays the progress of machining. The present invention relates to an electric discharge machining device that can be easily confirmed on the device.

[Prior Art] FIG. 6 is a block diagram showing a configuration of a conventional electric discharge machine. FIG. 6 shows a schematic configuration for executing processing from creation of NC (numerical control) data to processing of a workpiece when processing the workpiece by a conventional electric discharge machining apparatus. In the figure, 1 is an NC data creating device, 2 is an NC data input / output device, 3 is an NC tape storage device which is a memory for storing NC data, and 4 is an NC tape analyzing device which reads and analyzes the stored NC data. 5 is an NC tape editing device that adds corrections when input data needs to be corrected, 6
Is a device that numerically calculates the movement or machining command in the NC data,
That is, an axis interpolation data creating apparatus for creating axis interpolation data in consideration of the machining speed based on the created movement vector and electrical conditions, and 7 extracts only the electrical condition command from the analysis result to analyze and generate the electrical condition. An electric condition generator for machining, 8 is a servo machining device that generates electric discharge between an electrode and a workpiece by data given by minute line segments and electric conditions, and performs machining while detecting a voltage between electrodes. This is a display device such as a CRT (cathode ray tube) provided in a control device that performs graphic display of a processed shape and display of axis data and the like.

Next, the operation of the conventional electric discharge machine will be described. NC data is created by the NC data creation device 1 and
In order to check the figure based on the NC data, the figure is drawn on the display device 9 in the control device and the figure is checked. After confirming the figure, the created NC data is temporarily stored in the NC tape storage device 3 by the NC data input / output device 2. When processing the workpiece, the NC data is called and the processing is started. The NC program is read out one block at a time by the NC tape analysis device 4 that reads and analyzes the NC data, and the movement command, the electric condition, and the like are separated.

In the case of a movement command, a numerical operation of the movement command is performed, and in the case of an electrical condition, the command is passed to the processing electrical condition generator 7, in which the electrical condition command is analyzed to extract a corresponding electrical condition, and a power source ( The notch (not shown) is changed. next,
An axis interpolation data creating device 6 for creating axis interpolation data in consideration of a machining speed based on the created movement vector and electric conditions, and a servo machining device 8 for driving a motor (not shown) for moving an axis. Perform servo machining on the object. At the same time, a graphic drawing of the processing shape is performed on the display device 9 in the control device. At this point, the processing table stroke of the machine is checked, and if the processing is not performed properly, an NC program is created again. Processing is performed on the workpiece by adjusting or correcting it.

[Problem to be Solved by the Invention] Since the conventional electric discharge machining apparatus is configured as described above, when confirming a figure based on the NC data created by the NC data creating apparatus 1, the figure has a simple shape. In this case, the NC program is created by the NC data creation device 1 and the created NC program is rechecked using the graphic function of the display device 9 in the control device, and then processed on the workpiece. Therefore, in multi-cavity machining of an arbitrary shape, there is a problem that it takes much time and effort to create an NC program for final machining and cannot be easily obtained.

The present invention has been made in order to solve the above-described problems, and in a case where machining of a workpiece is multi-cavity machining of an arbitrary shape, an operator can perform multi-cavity-related EIA.
It is an object of the present invention to obtain an electric discharge machine capable of performing appropriate machining without creating an NC program by using the above, and displaying and confirming the progress of machining.

[Means for Solving the Problems] An electric discharge machining apparatus according to the present invention includes a machining shape element setting unit that sets a plurality of arbitrary machining shape elements, and a plurality of arbitrary machining shapes set by the machining shape element setting unit. A shape processing method setting unit that sets each processing position and processing order of the element; a processing path data generation unit that generates multi-cavity processing path data based on the data set by the shape processing method setting unit; A display unit for displaying the multi-cavity machining path created by the path data creating unit, wherein the display unit identifies and displays at least a machining completed position in the multi-cavity machining process and a position during machining. is there.

[Effect] The electric discharge machining apparatus according to the present invention does not require an operator to create an NC program by using a multi-cavity-related EIM in the case of multi-cavity machining of an arbitrary shape on a workpiece, and causes an NC program creation error or the like. Human error is eliminated.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an electric discharge machine according to an embodiment of the present invention. In the figure, 7 is a processing electrical condition generator for generating electrical conditions, 10 is a shape element setting device for setting shape elements, 11 is each processing position of the shape element set by the shape element setting device 10, Shape processing method setting device for setting the processing order of shape elements, 12 is a shape element setting device
A machining path creating device for creating machining route data in consideration of the shape element data from 10, the machining method data from the shape machining method setting device 11, and the electrical conditions from the electrical condition generator for machining 7; This is an automatic programming device for shape creation and processing, comprising an element setting device 10, a shape machining method setting device 11, and a machining route creation device 12.

Reference numeral 6 denotes an axis interpolation data generator for generating pulse data for axis movement based on the axis data calculated by the machining path generator 12, and reference numeral 8 denotes a discharge between the electrode and the workpiece, The servo machining device 9 performs machining using the pulse data for axis movement from the interpolation data creation device 6. The servo machining device 9 displays the output from the automatic programming device 40 for shape creation and machining, and displays the output result from the axis interpolation data creation device 6. This is a display device such as a CRT (cathode ray tube) provided in the control device for displaying.

FIG. 2 is a block diagram showing a configuration of a shape element setting device in the electric discharge machine of FIG. In the figure, reference numeral 10 denotes a shape element setting device, 13, 14, and 15 indicate basic shapes of the shape elements, 13 is a perfect circle of the shape (1), 14 is a quadrilateral of the shape (2),
Reference numeral 15 denotes each of the ellipses of the shape (3). 16 is a perfect circle
13 is the radius, 17 and 18 are the lengths of each side of the quadrilateral 14, 19 and 20 are the ellipse 1
The minor axis and major axis of 5. 21 is a shape element setting unit, 22 is a shape element selection unit of a basic shape, 23 is a radius 16 of a perfect circle 13, a quadrilateral 14
Is a registration memory for each data of up to 17 and 18 of the length of each side, and the minor axis and major axis 19 and 20 of the ellipse 15.

FIG. 3 is a block diagram showing a configuration of a shape machining method setting device in the electric discharge machine of FIG. In the figure, 10 is a shape element setting device, 11 is a shape processing method setting device, 24, 25
Is a pitch setting section in the X-axis direction and a pitch setting section in the Y-axis direction for setting the feed pitch between the shapes. 29 is a pitch moving path selecting section. 26,27,28 can be selected. Reference numeral 30 denotes a switch for setting validity / invalidity for the designation of automatic enlargement, and reference numeral 31 denotes a machining surface accuracy selection unit for selecting a machining surface state representing a cutting state such as rough, medium, or finish.

FIG. 4 is a view showing a data input screen of the automatic programming device for shape creation machining which is a screen displayed by the display device in the electric discharge machining device of FIG. 1, and FIG. 5 is a process of the machining route creation device in the electric discharge machining device of FIG. It is a figure showing a sequence.

Next, the operation of the electric discharge machine according to the embodiment of the present invention will be described.

First, the shape element selection unit 22 and the shape element setting unit 21 in the shape element setting apparatus 10 shown in FIG. 2 set three types of basic shape graphic elements and select a processing shape to be actually processed. Here, the graphic data of the set graphic is registered in the registration memory 23 having each shape area or variable area provided in the NC. Next, in the shape processing method setting device 11 shown in FIG. 3, it is determined how to process using the figure registered by the shape element setting device 10 shown in FIG.

At this time, when it is desired to process a large number of pieces, the pitch in the X-axis direction and the pitch in the Y-axis direction are designated, and the procedure to be processed is further determined by the pitch movement path selecting unit 29 by three types of pitch movement paths 26. , 27,28 is selected. Next, when the above-mentioned processing is a very small processing, whether or not to perform automatic enlargement is designated by the switch 30 for setting whether or not to designate automatic enlargement. At this time, the machining surface accuracy selection unit determines the degree of roughness (accuracy) of the machining surface.
Specify with 31.

After the basic elements of the figure and the processing procedure are registered by the processing as described above, processing is performed according to the processing sequence by the processing path creation device 12 shown in FIG. Here, first, shape selection N
o. (Number) is input, the corresponding shape element is extracted from the shape element registration memory 23 according to the corresponding No., and an NC program for shape processing of a single item is created and registered. Next, the processing method data, the current machine position data, the processing table stroke specific to the machine, and the like are read from the processing method registration memory 29, a matrix table of the processing path is created, and the display table data shown in FIG. There is a <matrix monitor>,
Each data of <machining range> is created. The calculation of the <matrix monitor> is automatically scaled so as to fill the display area by the pitch data in the X-axis direction and the Y-axis direction, the number of pitches, the size of the shape, and the like, and is drawn in a uragic manner. Thereby, it becomes clear where to process.
Next, graphic drawing is performed to determine in which order processing should be performed according to the path procedure in the registration memory 29 of the processing method. Finally, data on whether or not to perform machining by automatic enlargement for these machinings is read from the registration memory 30, and if automatic enlargement is specified, the offset value of the NC program for shape machining created by the shape element is changed. Then, the number of times of machining and machining conditions are calculated from the diameter of the electrode and the final dimension of the shape so that automatic enlargement is possible, and the machining conditions for guaranteeing the roughness of the machined surface at the time of final machining are calculated.

Note that, in the above embodiment, the case where the automatic programming device for shape creation processing is mounted inside the control device is shown, but it is not always necessary to have it inside the control device, and the data unique to the machine is held outside by a communication line. You may take in and implement.

Further, in the above embodiment, three types of simple shapes are shown as the basic shapes of the shape elements, but shapes other than the prescribed three types, for example, polygons may be used. In addition, when using a normal NC program for shape machining other than simple shapes, the label No. of the NC program for shape machining is used without defining the shape.
May be designated, whereby multi-cavity machining of the same shape can be easily and quickly performed.

[Effects of the Invention] As described above, according to the electric discharge machining apparatus of the present invention, a machining shape element setting unit for setting a plurality of arbitrary machining shape elements, and a plurality of arbitrary machining shape elements set by the machining shape element setting unit A shape processing method setting unit that sets each processing position and processing order of the processing shape element, a processing path data generation unit that generates multi-cavity processing path data based on data set by the shape processing method setting unit, A display unit for displaying the multi-cavity machining path created by the machining-path data creating unit, wherein the display unit identifies and displays at least a machining completion position and a machining position in the multi-cavity machining process. Therefore, when the machining of the workpiece is multi-cavity machining with an arbitrary shape, the operator
Appropriate machining can be performed without creating an EIA NC program, and furthermore, the progress of machining can be displayed and confirmed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an electric discharge machine according to an embodiment of the present invention, FIG. 2 is a block diagram showing a configuration of a shape element setting device in the electric discharge machine of FIG. 1, and FIG. 3 is an electric discharge machine of FIG. FIG. 4 is a block diagram showing a configuration of a shape machining method setting device in FIG. 4, FIG. 4 is a diagram showing a data input screen of an automatic programming device for shape creation machining which is a screen displayed by a display device in the electric discharge machine of FIG. 1, and FIG. FIG.
And FIG. 6 is a block diagram showing a configuration of a conventional electric discharge machining apparatus. In the figure, 1 ... NC data creation device, 2 ... NC data input / output device, 3 ... NC tape storage device, 4 ... NC tape analysis device, 5 ... NC tape editing device, 6 ... Axis interpolation data Creation device, 7: Processing electrical condition generator, 8: Servo processing device, 9: Display device, 10: Shape element setting device, 11: Shape processing method setting device, 12: Processing path creation device , 13… perfect circle, 14… quadrilateral, 15… ellipse, 16…
Radius of a perfect circle 13, 17, 18 ... Length of each side of a quadrilateral 14, 19, 20
…… the minor axis and major axis of the ellipse 15, 21 …… the shape element setting section, 22…
... shape element selection unit, 23 ... registration memory, 24 ... X-axis direction pitch setting unit, 25 ... Y-axis direction pitch setting unit, 26, 27, 28
…… Pitch movement path, 29 …… Pitch movement path selector, 30
... switch, 31 ... machining surface accuracy selection unit, 40 ... automatic programming device for shape creation processing. In the drawings, the same reference numerals indicate the same or corresponding parts.

──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. ⁶ Identification code FI G05B 19/4093

Claims (1)

(57) [Claims] An electric discharge is generated between an electrode and a workpiece,
In an electric discharge machining apparatus for processing a workpiece, a machining shape element setting unit that sets a plurality of arbitrary machining shape elements, and a machining position of each of a plurality of arbitrary machining shape elements set by the machining shape element setting unit and A shape processing method setting section for setting a processing order, a processing path data generating section for generating multi-cavity processing path data based on the data set in the shape processing method setting section, and a processing path data generating section for forming And a display unit for displaying the multi-cavity machining path,
The electric discharge machine characterized in that the display unit identifies and displays at least a position where machining is completed and a position where machining is being performed in multi-cavity machining.