JPS63134126A - Regulating device for fluid level in machining tank of electric discharge machine - Google Patents

Abstract

PURPOSE:To automatically change height of a fluid level, by calculating the height of the machining fluid level for a workpiece in a machining tank by an NC unit to be detected and controlling the height of the fluid level driving a fluid level regulating means while supplying and discharging machining fluid. CONSTITUTION:A control unit 12, setting a coordinate value to a predetermined value, stores in memory the coordinate value, in which the present value in the direction of a Z-axis corresponds to zero, and a coordinate value A of height of machining fluid level is determined from the present value and a fluid level safety height coordinate value. Machining fluid level height B is always detected by a detecting device 13 and compared with the coordinate value A of height of machining fluid, and if the value A is larger, a filling pump 15 is actuated allowing machining fluid 4 to flow into a machining tank 3 from a fluid tank 16, and a dam adjusting plate 10 is moved upward by turning a thread 8 by a motor 6. On the contrary, if the height B is larger, the fluid 4 is discharged by actuating a fluid discharge valve 14, and the dam adjusting plate 10 is moved downward. If the values A, B are placed in an agreement condition, the height of a fluid level is controlled by stopping the motor 6 and the discharge valve 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a means for automatically adjusting the height of a machining liquid level in a machining tank of an electric discharge machining apparatus.

[Conventional technology]

FIG. 4(a) is a diagram showing an example of a machining tank of a conventional electrical discharge machining device, and in the figure, (1) indicates tool ionization, (
2) is a workpiece placed opposite to the tool electrode (1) through a minute gap, (3) is a machining tank in which the workpiece (2) is placed, α4 is a tl filled with the machining tank (3), 1 Knee processing fluid, G
O is the base adjustment plate that determines the surface height of the machining fluid (4) that overflows into the machining Fi (4)', @ is the base adjustment plate (1 (
Set I to a predetermined height (・τ is fixed at the setting pin, @ is the adjustment hole into which the setting pin is inserted. tζO, (5) is the means for adjusting the machining liquid level, and the weir plate adjustment plate It consists of QG, setting bin, and adjustment hole (c).

Next, the operation will be explained. Processing [When processing the workpiece (2) installed in (3),
It is necessary to set the f-co processing liquid (4) surface corresponding to the flatness of 2). Therefore, when setting the machining fluid (4) surface height, the base adjustment plate Q07 of the machining fluid level height adjusting means (5) must be manually set. This is done by inserting and fixing the setting bin (A) into the vM adjustment hole (C) at a predetermined height. In this case, the machining fluid (4) is applied to the substrate adjusting plate as shown in FIG. 1(b).
Since it overflows from G, the height of the machining fluid (4) surface is
The height will be set to the above-mentioned overflow height.

[Problems that the invention attempts to solve]

Traditional release? Since the machining tank of the IR machining equipment is configured as described above, the machining liquid level must be adjusted manually depending on the machining situation, and once adjusted, it may occur during machining. There is a problem that the adjustment cannot be changed.

This invention was made to solve the above-mentioned problems, and it eliminates the need for manual adjustment of the machining liquid level, and
An object of the present invention is to provide a machining tank liquid level adjusting device for a machining machine capable of adjusting the machining fluid level in a machining tank by a value commanded by an o device.

[Means for Solving the Problems] The electric discharge machining apparatus according to the present invention detects the machining fluid level height in the machining tank by the machining fluid level height detection means, and detects the machining fluid level height in the machining tank together with the hcC device input dimension. The machining liquid level height shim 1 adjusting means is driven by the command.

[Effect]

In this invention, the NC device calculates the height of the machining liquid level required for the workpiece in the machining tank, and the machining liquid level detection means detects the height of the machining liquid level (, It's processing it
The required height of the machining fluid level can be adjusted by supplying or discharging the machining fluid and driving the means for positioning the machining fluid tAfM.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. Note that the same reference numerals as in the apparatus shown in FIG. 4 indicate the same parts, and a description thereof will be omitted.

In Fig. 1, (0) is the motor that rotates the ball screw (8) in the forward and reverse directions, (7) is the brake that suppresses the inertia force of the motor (6), and (9) is the screw on the ball screw (8). It is a female thread that is fixed to the base adjustment plate αa, and also moves the base adjustment plate aO up and down.
) bearing, the mouth is a′! Arrx, Hari is a processing tank (
3) Processing F1. (4) A float that detects the height of the surface, 113J is a float (13aJ detects it and a converter that converts the value into an electrical signal, (13i is a converter that processes the detection signal from the converter (13b) and The liquid level height detector that outputs to the device (2) operates according to the command from the NO device ■.
Transfer the machining fluid (4) from the machining tank (3) to the machining fluid tank Qll.
) The machining fluid discharge valve 09 operates according to the command from the No. device (a) to drain the machining fluid from the machining fluid tank αG to the machining tank (3).
This is a rapid filling pump for processing liquid (4). Note that (5) is a processing fluid level adjustment means similar to the conventional device, which includes a motor (6), a brake (7), a ball screw (8), and a ring screw (9).

It consists of a base adjustment plate αO9 bearing α, and also 0
3 is a processing liquid level detection means, which is a float ttaa)
.

It consists of a converter (18h), an M-plane height detector (18QJ), and (a) is a machining fluid supply and discharge means, and a machining fluid discharge valve α is also a machining fluid rapid filling pump (a), a machining fluid Consists of tank OG.

Note that FIG. 2 shows the control operation of an embodiment of the present invention.
It is a flowchart figure of o apparatus. In addition, Fig. 3 shows the perpendicular direction of the diagonal machining electrode <1) to the workpiece (2).
This is a diagram showing the coordinate values of each element in the direction of the axis. In the diagram, αη is the machining fluid safety height coordinate value, (to) is the machining fluid level height machine coordinate value, and QLJ is the machine coordinate value when setting the coordinate value. The value is 2@machine coordinate origin, 3D is the machining fluid level position coordinate value, (Foundation)
is the machine coordinate value, and (a) is the Z axis.

Next, the operation will be explained. In Figures 1 to 3,
First, the coordinate values are set to predetermined values by the No. control device @ [coordinate values are set according to (9) in Figure 2], and the machine coordinate values @ corresponding to the current value of the 2@ direction are set to zero in Figure 2. (IOI
Memorize the machine coordinate values as shown in J. The machining fluid level height on the machine coordinate value side is determined from this stored machine coordinate value and the machining fluid level safe height coordinate value α set by the NC device command [+102 in FIG. Determination of the machining liquid level height of l [A]]. The machining fluid level height is measured by the machining fluid level detection device (2)
1 is always detected and stored in the machining fluid level height detection "B" at +108) in Figure 2, and the machining fluid level height machine coordinate value determined above is shown in (102) in Figure 2. Processing liquid level height determination rAJ and the machine coordinate value of the processing liquid level height detected above [
Compare rAJ and rBJ in Figure 2 (104J) with machining fluid level height detection rBJ shown in Figure 2 (103).

Compare T. As a result, if "A" is thick, then t in Figure 2
105J, proceed to N At the same time, the motor (6) is activated by turning on the motor (107J) as shown in Fig. 2.The operation of the motor (6) rotates the ball screw (8), and this rotation moves the female screw (9) upward for base adjustment. The height of the machining liquid level is adjusted by moving the plate αO upward.By repeating this, rAJ and rBJ become equal, and when the state is reached, the motor (
6) The machining liquid rapid filling pump is stopped by turning off the motor rotation at (108) in FIG. 2 and cutting off the machining rapid filling at +109J, and is controlled so that the machining liquid level reaches the set height. Well, if rBJO is thicker, then (105
Go to Yes in J and close the machining fluid discharge valve α4+ (II
It is activated by the machining fluid tank shown in OJ, and the machining fluid (4) in the machining tank (3) is all discharged into the machining fluid tank 0e, and at the same time, the motor (6) is activated by turning on the motor (107) in Fig. 2. 5. The ball screw (8) is rotated by the operation of the motor (6), and the female screw (9) is rotated by the rotation.
The height of the machining liquid level is adjusted by moving the base adjustment plate 00 downward. By repeating this, the above 1゛A'' and r
When the BJ matches and reaches the state of 1, turn off the motor rotation of the above motor (6 and machining fluid discharge valve tlo13 in Figure 2) and turn off the t.
It is stopped by a machining fluid tank of 109 AJ and controlled so that the machining fluid level reaches the set height. Base adjustment plate 00
When the machining fluid (4) is on the upper side, the machining fluid is also discharged from the QO portion of the base adjustment plate as shown in FIG. 1(b).

In the above embodiment, the motor (6) is used as a means for moving the machining fluid level adjustment means (5), but hydraulic pressure,
It may also be driven by nitrogen pressure or water pressure.

〔Effect of the invention〕

As described above, according to the present invention, the No device calculates and determines the height of the machining liquid level with respect to the workpiece in the machining tank, and the machining liquid level detection means detects the height of the machining liquid level. At the same time, while supplying or discharging the machining fluid, the machining fluid level height adjustment means is driven and controlled so that the height is equal to 1. There is an effect that it can be done quickly, quickly and automatically without the need for intervention.

[Brief explanation of the drawing]

FIG. 1(11) is a configuration diagram showing a machining tank of an electrical discharge machining apparatus according to an embodiment of the present invention, FIG. Figure 2 shows the control operation according to an embodiment of the present invention, and Figure 3 shows the coordinate values of each element in two axes when determining the machining liquid level. FIG. 4A is a block diagram showing a machining tank of a conventional electrical discharge machining device, and FIG. 4(b) is a side view of the machining tank of a conventional electrical discharge machining device. In the figure, (2) is the workpiece, (3) is the machining tank, (4) is the machining fluid, (5) is the machining fluid level adjustment means, (a) is the No. device, and the side is the machining fluid level height. The flash is the machining fluid supply and discharge means. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] A machining fluid level detection means for detecting the machining fluid level height in the machining tank, a machining fluid supply/discharge means for supplying or discharging the machining fluid to or from the machining tank, and a machining fluid level detection means for detecting the machining fluid level height in the machining tank; The height of the machining fluid level in the machining tank is calculated from the coordinate values of the workpiece, and based on the calculation result, a command to operate the machining fluid supply and discharge means and the machining fluid level height adjustment means is output, and the machining fluid level is increased. A command to stop the operation of the machining fluid level adjusting means and the machining fluid supply and discharge means when the machining fluid level height detected by the surface height detection means matches the machining fluid level height calculated above. What is claimed is: 1. A machining tank liquid level adjustment device for an electrical discharge machining device, characterized in that the device is equipped with an NC device that outputs.