JP2750394B2 - Display method of wire cut electric discharge machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a wire electric discharge machine.

[Prior Art] A conventional wire cut electric discharge machine calculates a machining speed based on a distance that a workpiece and a wire have relatively moved during a predetermined time during electric discharge machining. When the processing speed is displayed on a CRT or the like, the unit of the processing speed is m
m / min is used.

[Problems to be Solved by the Invention] However, in the above-described conventional apparatus, if the thickness of the work changes only with the relative movement speed between the work and the wire, regardless of the thickness of the work being always constant, There is a problem that it cannot be accurately determined whether the current processing speed is faster or slower than an appropriate speed.

An object of the present invention is to provide a wire-cut electric discharge machine capable of accurately grasping a machining speed.

[Means for Solving the Problems] The present invention measures the electric discharge machining cross-sectional area per unit time,
Based on this measured cross-sectional area, the machining speed during EDM
It is displayed in ² / min.

[Action] The present invention measures the electric discharge machining cross-sectional area per unit time,
Based on this measured cross-sectional area, the machining speed during EDM
Since it is displayed at ² / min, the processing speed can be accurately grasped.

Embodiment FIG. 1 is a block diagram showing an embodiment of the present invention.

In this embodiment, the CPU 10 controls the whole of the above embodiment, and the ROM 20 is a memory for storing a program corresponding to the flowchart shown in FIG.
The RAM 30 is a work memory, and the I / O port 40 is a port that outputs signals for driving the X-axis motor 41, the Y-axis motor 42, the Z-axis motor 43, and the like.

CRT50 is, X axis, Y axis, Z axis, U-axis, V-axis, and displays the position of the W-axis, as described later, which displays a processing speed, mm ² as the unit of the machining speed / min
Use In the CRT 50, reference numeral 51 indicates a processing speed display area.

The keyboard 60 is an example of means for inputting various setting data and inputting work 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 described.

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

First, before starting the electric discharge machining, the thickness data of the work is input using the keyboard 60, and the input thickness data is stored in the RAM 30. During the electric discharge machining, the CPU 10 manages the operation amount of the motors 41 to 43 and checks at what speed per minute the motor is moving.

In FIG. 2, first, the CPU 10 reads the thickness data from the RAM 30 (S1), initializes the variable P of the number of discharge pulses to 0 (S2), and sets the variable P of the number of pulses to 1 each time one pulse is processed.
Increment (S3, S4).

As described above, the variable P is incremented by one each time processing for one pulse is performed for one second, and after one second has elapsed (S5), the traveling speed F of the wire is obtained by the minute speed (S6). It should be noted that a in S6 indicates the advancing distance (mm) of the wire per pulse.

Then, the variable P of the number of pulses is initialized to 0 (S7), and the processing speed is obtained (S8). In this case, the processing speed is obtained by multiplying the traveling speed F of the wire by the thickness data (mm).

Then, the processing speed (mm ² / mi
n) is displayed in the display area 51 of the CRT 50 (S9).

Then, returning to S3, the above operation (S3 to S9) is performed for the next one second.
repeat.

By doing as described above, the processing speed of the wire on the workpiece can be accurately grasped.

The operation shown in FIG. 2 shows the operation when the machining speed is obtained for one axis, for example, the X axis. However, the operation shown in FIG. 2 is for two axes, for example, the X axis and the Y axis. The same applies to the case where the wire processing speed is obtained in the same manner as above. The case where the wire processing speed is obtained in three axes, that is, three-dimensionally, is also the same as above.

Further, in the above embodiment, the operator measures the plate thickness of the work and inputs the measured data from the keyboard. However, the electric discharge machine automatically measures the plate thickness data. You may.

[Effects of the Invention] According to the present invention, there is an effect that the processing speed can be accurately grasped.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one 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)

(57) [Claims] 1. Processing is started under predetermined processing conditions,
Calculating a forward distance a of the wire electrode per unit pulse based on the amount of operation of the motor per unit time; counting the number of pulses per unit time that occur during subsequent machining; Multiplying the number of pulses and the advance distance a to obtain a current processing speed mm / min; and obtaining a processing speed mm ² / min based on the processing speed and a previously input work plate thickness. And displaying. A display method for a wire-cut electric discharge machine, comprising: