JPH0379230A - Wire cut electric discharge machine - Google Patents

Abstract

PURPOSE:To grasp a machining speed accurately, by measuring an electric discharge machining cross sectional area per unit time, and indicating the machining speed in the midst of electric discharge machining in mm<2>/min, on the basis of this measured cross sectional area. CONSTITUTION:A CPU 10 first reads plate thickness data from an RAM 30, and initializes the variable P of the pulse number of electric discharge into 0, and conducts 1 increment of the variable P of the pulse number each time 1 pulse machining is done. Thus, during a period of one second, the variable P is conducted with 1 increment each time machining enough for 1 pulse is done, and after one second has elapsed, the progress speed F of a wire is sought per minute speed. And, the variable P of the pulse number is initialized into 0, and a machining speed is sought. The machining speed thus sought is indicated at the indication sphere 51 of a CRT 50.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a wire-cut electrical discharge machine.

[Prior Art] A conventional wire-cut electric discharge machine calculates a machining speed during electric discharge machining based on the distance that a workpiece and a wire move relative to each other in a predetermined period of time.

When the machining speed is displayed on a CRT or the like, am/win is used as the unit of the machining speed.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional apparatus, even if the thickness of the workpiece is always constant, if the thickness of the workpiece changes only by the relative movement speed between the workpiece and the wire, There is a problem in that it is not possible to accurately determine whether the current machining speed is faster or slower than the appropriate speed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a wire-cut electrical discharge machine that can accurately determine machining speed.

[Means for Solving the Problems] The present invention measures the electric discharge machining cross-sectional area per unit time, and displays the machining speed during electric discharge machining in layer weight 2/1n based on this measured cross-sectional area.

[Function] The present invention measures the electric discharge machining cross-sectional area per unit time, and based on this measured cross-sectional area, the machining speed during electric discharge machining is adjusted to mm.
Since it is displayed as 2/win, the machining speed can be accurately grasped.

[Example] Figure i1 is a block diagram showing an embodiment of the present invention.

In this embodiment, the CPU 10 controls the entire embodiment, the ROM 20 is a memory that stores programs corresponding to the flowchart shown in FIG. The boat 40 has an x-axis motor 41. This boat outputs signals for driving the Y-axis circumferential motor 42, the Z-axis circumferential motor 43, and the like.

The CRT 50 not only displays the positions of the X-axis, Y-axis, Otori 2
Use 1 in. Note that among the CRT50, the code 5
1 indicates a machining speed display area.

The keyboard 60 is an example of a means for inputting various setting data and also inputting workpiece thickness data.

FIG. 3 is a diagram showing a display example of the CRT 50 in the above embodiment.

Next, the operation of the above embodiment will be explained.

FIG. 2 is a flowchart showing the operation of the above embodiment.

First, before starting electrical discharge machining, the plate thickness data of the workpiece is input using the keyboard 60, and this input plate thickness data is stored in the RAM 30. During electrical discharge machining,
The CPU 10 manages the amount of operation of the motors 41 to 43 and checks how many layers per minute they are moving.

In Fig. 2, CPU10 first reads plate thickness data from RAM 30 (Sl), initializes the variable P for the number of discharge pulses to 0 (S2), and increments the variable P for the number of pulses by 1 every time one pulse is processed. (S3, S4).

As mentioned above, the variable P is incremented by 1 every time one pulse is processed for one second, and after one second has passed (
SS), find the advancing speed F of the wire in minutes (S6),
Note that a in S6 is.

It shows the forward pressure II (layer temperature) of the wire per one pulse.

Then, the pulse number variable aP is initialized to 0 (S7), and the machining speed is determined (S8). In this case, the machining speed is the wire advancement speed F multiplied by the plate thickness data (ms+).

Then, the machining speed (+1112
/sin) is displayed in the display area 51 of the CRT 50 (
S9).

Then, return to S3 and perform the above operations (33 to 3) for the next 1 second.
Spell out 9).

By doing the above, it is possible to accurately grasp the processing speed of the wire on the workpiece.

The operation shown in Fig. 2 shows the operation when determining the machining speed for the l-axis, such as the X-axis, for example.
The above procedure is the same when determining the wire machining speed on two axes, such as the X-axis and the Y-axis, that is, two-dimensionally, and also when determining the wire machining speed on three axes, that is, three-dimensionally. Same as above.

In addition, in the above embodiment, the operator measures the thickness of the workpiece and inputs the measured data from the keyboard, but it is also possible for the electric discharge machine to automatically measure the thickness data. You can also do this.

[Effects of the Invention] According to the present invention, it is possible to accurately grasp the machining speed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the above embodiment. FIG. 3 is a diagram showing a display example of the CRT 50 in the above embodiment. 10...CPU, 20...ROM, 30...RAM. 50...CRT.

Claims (1)

[Claims] Measure the electrical discharge machining cross-sectional area per unit time, and set the machining speed during electrical discharge machining to mm^2/mi based on this measured cross-sectional area.
A wire-cut electric discharge machine characterized by being indicated by n.