JPH0542423A - Oscillating machining method for asymmetrical pattern of nc diemilling electric discharge machine - Google Patents

Abstract

PURPOSE:To provide an oscillating machining method for an asymmetrical pattern in an NC diemilling electric discharge machine in which there is no useless oscillation of an electrode when a form to be machined is asymmetrical and high transferring accuracy can be realized. CONSTITUTION:In this oscillating machining method for an asymmetrical pattern, more than two pairs of oscillating directions are designated in an optional direction A from an oscillation center P of an electrode with a pair consisting of an optional moving amount L and an optional divided moving amount 1 or a moving amount divided into the optional number of times 'n', the machining order is optionally specified and these data is put into an NC device so as to carry out desired oscillating machining.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of swinging an asymmetrical pattern of an NC EDM machine.

[0002]

2. Description of the Related Art Since rocking machining has high machining accuracy and improves machining efficiency, this machining method is the basis for an NC EDM machine, and machining methods for various rocking patterns. Is registered. Therefore, the operator can cause the NC device to perform the desired swing machining by selecting a desired pattern and inputting predetermined data to the NC device. FIG. 4 shows an example of a swing pattern formed by intersecting straight lines.
(A) is a cruciform shape, (b) is an X shape, and (c) is a 16-divided shape which is symmetrical in the vertical and horizontal directions.

[0003]

As described above, in the swing machining, the machining becomes easy by selecting the registered pattern. However, when the registered pattern has a symmetrical machining shape. However, in the case of the asymmetric type, the operator had to combine the G codes as in the past to create a program. Further, as shown in FIG. 3A, when the processed shape is a semicircle and the left and right sides are symmetrical, but when the upper and lower sides are asymmetrical, a 16 division pattern is used as shown in FIG. If you use it, in addition to the unnecessary swinging indicated by *, there is no swing that matches the direction of the corner of the semicircle.
There is a problem that a lot of processing time is lost and the transfer accuracy is lowered.

The present invention has been made in view of such a problem. Even when the processed shape is asymmetric, there is no unnecessary electrode oscillation, and an asymmetric pattern having a high transfer accuracy can be realized. An object of the present invention is to provide a rocking method.

[0005]

In order to achieve the above-mentioned object, the method of swinging an asymmetrical pattern according to the present invention comprises:
Two or more sets of swing directions are designated, and the processing sequence is arbitrarily designated, with one set consisting of an arbitrary amount of movement, an arbitrary amount of divided movement, an arbitrary number of divisions, etc. in any direction from the swing center of the electrode. Then, the data is input to the NC device to perform desired swing machining. Here, the divided movement amount is a movement amount by one swing, and may be equal or different each time.

[0006]

[Operation] When the processed shape is asymmetric with respect to the center of swing,
The operator recommends the machining shape, transfer accuracy, machining time, etc., and arbitrarily designates two or more sets of swing directions, and also the amount of movement of the electrodes in each swing direction, the amount of division movement, the number of divisions, etc. Are arbitrarily specified, and further, the processing order is arbitrarily specified, and then these data are input to the NC device. The NC device carries out a desired swing machining by a built-in program based on these input data.

[0007]

EXAMPLES Next, examples of the present invention will be described.
FIG. 2 is a schematic diagram of an NC die discharge electric discharge machine embodying the present invention. In the figure, 1 is a machining electrode, 3 is a workpiece,
Reference numerals 5 and 7 are cross tables that move in the X-axis and Y-axis directions, 9 is a quill that holds the machining electrode 1 and that moves in the Z-axis direction, and 11, 13, 15 are cross tables 5 in the X-axis direction and the Y-axis direction, respectively. , 7 and a quill 9 are controlled by a driving device, 17 is a power supply device for supplying a predetermined pulse between the electrodes composed of the machining electrode 1 and the workpiece 3, and 19 is a three-axis X, Y, based on a built-in program. It represents an NC device or the like for controlling Z. Note that the processing tank, the processing liquid supply device, etc. are omitted for the sake of simplicity.

The above-mentioned three-axis control NC device 19 has a built-in program and predetermined data that are input to control (1) an arbitrary amount of movement in any direction from the center of swing, and (2) the center of the pattern. The movement direction, movement amount, divided movement amount and number of divisions are set as one set, and control of two or more sets of swing directions is performed. (3) Control according to a processing order specified separately from the input order, (4) Arbitrary processing It is possible to control the change of the pattern in the depth.

Next, a processing method when the processing shape is a semicircle as shown in FIG. 1 will be described. First, the swing center P is determined, and the swing straight lines 1, 2, 3, 4, 5, 6 are drawn from the swing center P to the straight lines 1, 4
Are vertical swing directions A ₁ and A ₄ , straight lines 3 and 5 are corner swing directions A ₃ and A ₅ , straight lines 2 and 6, respectively.
Are defined in the swing directions A ₂ and A ₅ which are 1/2 of the angle formed by the straight lines 1 and 3 and 1 and 5, respectively. Further, the total movement amount L _{1 to} L ₆ in each direction, the division movement amounts l _{1 to} l ₆ , and the division number n ₁ to
Determine n ₆ . Further, the processing order is determined so that the processed chips can be easily removed. Next, these data are transferred to the NC device 1.
Input to 9. The NC device is based on these data
The built-in program enables the swinging of a desired pattern efficiently and highly accurately. If necessary,
The swing pattern can be changed at any processing depth.

[0010]

As can be understood from the above description, since the present invention has the structure described in the claims, even when the processed shape is asymmetric, the conventional unnecessary electrode vibration is generated. There is no movement. In addition, the advantage of rocking machining at the corners and the like can be exhibited. Therefore, a highly accurate product can be obtained in a relatively short time.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of input parameters such as a swing direction, a movement amount, a division movement amount, and a division number when a processing shape is a semicircle (horizontal symmetry, vertical asymmetry).

FIG. 2 is an explanatory view of an NC type electric discharge machine embodying the present invention.

FIG. 3 is an explanatory diagram when processing is performed with a conventional swing pattern when the processing shape is vertically asymmetric.

FIG. 4 is an explanatory diagram of a conventional linear swing pattern (a) cross shape, (b) X shape, (c) split shape, etc.

[Explanation of symbols]

P swing center A ₁ to A ₆ swinging direction L ₁ ~L ₆ moving amount l ₁ to l ₆ divided moving amount n ₁ ~n ₆ split times

Claims (1)

[Claims] 1. A swinging direction is designated for two or more sets, with one set including an arbitrary amount of movement, an arbitrary amount of divisional movement, an arbitrary number of divisions, etc. in an arbitrary direction from the swing center of the electrode, and machining. An asymmetric pattern swing machining method for an NC EDM machine, characterized in that an arbitrary sequence is designated and input to an NC device to perform desired swing machining.