JPH0360924A - Prevention of erroneous installation of electrode guide - Google Patents

Abstract

PURPOSE:To prevent the working with fitting an unproper electrode guide on by deciding the propriety of the installation to the machine and that of the combination of upper and lower electrode guides based on the usage data of the electrode guide corresponding to a code and alarming in case of being unproper. CONSTITUTION:A usage discriminating code is given by an operation part 20 to each electrode guide 5 in advance and the usage data corresponding to each symbol is stored in an NC control device 21. The code of this guide 5 is then read by the NC control device 21. The usage data of the electrode guide 5 corresponding to this read code is displayed on the display device CRT attached to the NC control device 21. Moreover, the propriety of the installation to the machine and that of the combination of the upper and lower electrode guides are decided based on the data by the NC control device 21 and a warning is given in case of being unproper.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to a wire electrical discharge machine equipped with replaceable electrode guides.

Conventional wire electrical discharge machines typically include electrode guides inside an upper wire guide and a lower wire guide to guide the wire to a predetermined position.

The electrode guide uses an automatic wire connection mechanism (abbreviated as AWF).
There are standard machines that do not have the same mechanism as AWF-capable machines, and there are about 8 standard types depending on the wire diameter, and special machines that have AWF-capable machines.
There are also special ones for regular machines. Moreover, these are each classified into upper guide and lower guide.

Specifically, looking at a certain wire electrical discharge machine, this machine has a wire diameter of φ0.05. φ0.1゜φ0.14.
φ0.15. φ0,2. Those suitable for φ0.25° and φ0.3 are prepared, and special ones that are suitable for AWF are available for φ0.2. There is a wire diameter corresponding to φ0゜25, and a wire diameter of φ0.25 for regular machines. 076, φ0.
33 wire diameters are available.

Special φ0.2. The one with a diameter of 0°25 is necessary for actually exhibiting the AW1 function in an AWF capable machine, and is characterized by having a V-shaped groove in the guide portion and a presser plate that opens and closes during automatic wire connection.

Further, the special φ0.076 for regular machines is used for precision machining, and the φ0.33 is used for high-speed rough machining, but they are used less frequently.

In a wire electric discharge machine, it is necessary to select or replace an appropriate electrode guide depending on the diameter of the wire used.

However, in this case, each of the electrode guides described above has almost the same external shape, and although they have features such as markings and the aforementioned presser plate, it is not easy to distinguish them by appearance. In addition to the range of electrode guides, there are also areas between and above electrode guides for different types of electrical discharge machines.
Since many electrode guides can be attached to each other with respect to the lower wire guide, incorrect attachment may occur.

On the other hand, once an electrode guide is attached to a wire guide, it is not easy to check what kind of electrode guide is attached, and even if the appropriate electrode guide is attached, it is not easy to confirm. Once the wire guide was disassembled and the electrode guide removed, the user had to perform time-consuming vertical adjustment again, which was inconvenient.

In addition, incorrect applications (for normal machines, for AWF machines, wire diameter,
If the electrode guide (determined for the upper guide and the lower guide) is used as is without proper knowledge, the expected AWF function may not be achieved, or the electrode guide may be damaged or the machining accuracy may be reduced.

Problems to be Solved by the Invention An object of the present invention is to provide a method for preventing incorrect attachment of an electrode guide, which can prevent an inappropriate electrode guide from being used while attached to a wire electric discharge machine.

Means to solve problems A usage identification code is assigned to each electrode guide.

Application data corresponding to each of the above symbols is stored in the NC control device.

The code is read by the NC control device.

Application data of the electrode guide corresponding to the code is displayed on a display device attached to the NC control device.

Based on the data, the NC control device determines the suitability of mounting on the machine and the suitability of the combination of the upper and lower electrode guides, and issues a warning if the combination is inappropriate.

action The application identification code classifies each electrode guide.

The usage data display indicates the usage of the electrode guide.

A warning informs you of incorrect attachment of the electrode guide.

Embodiment FIG. 1 shows an upper wire guide 1 and a lower wire guide 2 in a wire electric discharge machine, which have almost the same structure and are disposed opposite to each other. Note that this wire electrical discharge machine is N
Controlled by C controller.

The upper wire guide 1 is roughly composed of a substrate 3, a support 4, an electrode guide 5, a holder 6, and a nozzle 7.

The support body 4 has a cylindrical shape, and has a wire insertion hole 8 in the center, and a machining fluid flow hole 9 penetrating in the vertical axial direction at a position off the center, and the lower end of the wire insertion hole 8 is enlarged to guide the electrode. A fitting hole 1 formed in the positioning hole 10 of No. 5 and into which the No. 7 flange 11 of the electrode guide 5 is fitted centered.
2 (FIG. 3), and is fixed to the substrate 3 with screws.

The electrode guide 5 has a cylindrical shape with a flange 11, and has a wire insertion hole 13 passing through the center in the axial direction and a machining fluid flow hole 14 formed in the flange 11, and the base is connected to the positioning hole 1 described above.
0, the flange 11 is fitted into the fitting hole 12 of the support 4, and the machining fluid flow hole 14 is aligned with the machining fluid flow hole 9 of the four supports, that is, the flange 11
position in the circumferential direction, and insert screw 1 into the bottom surface 15.
It is attached by fixing with 6 (3 pieces).

The holder 6 is cylindrical with a large diameter, and the nozzle is attached to the hole 1 at the tip.
7, which is attached to the support 4 so as to cover the electrode guide 5. The holder 6 can be rotated relative to the support 4 and moved up and down to select an upper position or a lower position.

The nozzle 7 has a diameter equal to that of the flange 11 in the electrode guide 5.
The nozzle hole 18 is slightly larger than the diameter of the holder 6 and is screwed onto the tip of the holder 6.

The tip of the electrode guide 5 is located opposite the nozzle hole 18, and FIG. 1 shows the arrangement when the holder 6 is in the lower position. At this time, the wire cutting process is in progress, and the nozzle hole 18 is open.

When replacing the electrode guide 5, place the nozzle 7 in the holder 6.
The screw 16 exposed inside the holder is removed, the base of the electrode guide 5 is pulled out from the positioning hole 10 of the support 4, and the entire nozzle is attached to the hole 1.
Take it out from 7. A new electrode guide 5 is installed by reversing this procedure, aligning the working fluid flow hole 14 in the flange 11 of the electrode guide 5 with the flow hole 9 of the four supports and fixing it with screws 1.

The bottom surface 15 of the fitting hole 12 in the support body 4 is
5-bit ON-OF switches 19 arranged in a row in the radial direction are also arranged on the flange 11 of the electrode guide 5.
On the surface in contact with the bottom surface 15, an operating section 20 consisting of 5-bit concaves and convexes, which correspond exactly to each of the ON-OF switches 19, is arranged in a row. In addition, ON・O
Each of the F switches 19 is a completely waterproof microswitch.

In the operation section 20, the recess is the 0N-OFF switch 1.
One of the numbers 9 is a hole that can be inserted without resistance, and the convexity means that no wire hole is formed. Therefore, by changing the arrangement of the unevenness, 32 types of usage identification codes can be created.

Each of the ON/OFF switches 19 is connected to a decoder 22 of an NC control device 21 included in the wire electric discharge machine, as shown in FIG.

The unevenness of the operation part 20 on the flange 11 of the electrode guide 5 corresponds to the purpose of the electrode guide 5, that is, whether it is for a normal small use, an AWF-capable small use, an upper wire guide or a lower wire guide, and which wire diameter it corresponds to. The arrangement is determined depending on the type of use, and a usage identification code is assigned to each electrode guide 5 accordingly.

On the other hand, usage data is stored in the nonvolatile memory section of the NC control device 21 from the MDI or the like in correspondence with the usage identification code.

Although the upper wire guide 1 has been described above, the lower wire guide 2 also has the same structure although the upper and lower sides are reversed, and the main parts are given the same reference numerals and the explanation thereof will be omitted.

Automatically or M before starting the wire cutting process.
In response to the command input from the DI, the NC control device 21 executes the electrode guide confirmation process shown in FIG.

Note that model data and wire diameter data are set in advance in the NC control device.

First, read the application identification code of the upper and lower electrode guides 5 installed (step 1). This code is electrode guide 5
is attached to the fitting hole 12 of the support body 4, the operation part 2
The ON/OFF switch is turned ON only by the convex portion of 0.

In step 2, the data corresponding to the code is read from the memory and displayed on the attached CRT screen, then in step 3 it is checked whether it matches the model, in step 4 it is checked whether the upper and lower electrode guides correspond correctly, and in step 6 It is determined whether the wire diameter corresponds to the set wire diameter, and if even one of these is not correct, the attached electrode guide 5 is deemed inappropriate and an alarm is issued in step 6.

The alarm may take the form of a sound, blinking at a location of inappropriate data on the screen, or a combination thereof.

The above is an example, and the method of creating the application identification code regarding the electrode guide 5 is not limited to the operation part 20 using unevenness and the ON-OFF switch using a microswitch. Also,
In step 6, the wire cutting process may be prevented from starting unless the alarm state is canceled along with the alarm.

Effects of the Invention Since the suitability of the installed electrode guide is indicated prior to the wire cutting process, there is no possibility of starting the process with an inappropriate electrode guide.

In addition, the purpose of the attached electrode guide can be confirmed without removing it from the wire guide.

As a result, damage to the electrode guide and poor processing accuracy can be avoided.

[Brief explanation of drawings]

Figure 1 is a partially cutaway front view, Figure 2 is a perspective view,
Figure 3 is a perspective view, Figure 4 is a schematic block diagram of the main parts, Figure 5
The figure is a flowchart of the process. 5... Electrode guide, 19... ON/OFF switch, 20... Operating unit, 21... NC control device. 1st curse

Claims (1)

[Claims] A usage identification code is given to each electrode guide, usage data corresponding to each code is stored in the NC control device, and the code is read by the NC control device and usage data of the electrode guide corresponding to the code is stored. A wire characterized in that it is displayed on a display device attached to the NC control device, and based on the data, it determines the suitability of attachment to the machine and the suitability of the combination of the upper and lower electrode guides, and issues a warning if it is inappropriate. Method for preventing incorrect installation of electrode guides in electrical discharge machines.