JPS6357122A - Electric discharge machine - Google Patents

Abstract

PURPOSE:To enable both electric discharge machining and wire-cut electric discharge machining with one EDM unit, by installing a mounting seat, stretching an electric discharge machining electrode of a form-type electrode or the like or a wire electrode, in a working head of one ram type electric discharge machine. CONSTITUTION:When arm electric discharge machining is applied, each bolt is attached to slots 5a and 5a of a base 5, and a form-type electrode is locked to the base with a nut or the like clamped. Next, when wire-cut electric discharge machining is performed, a wire electrode guide arm 14 is attached to a mounting seat at a lower part of the base 5 and a wire electrode supply drum 15 and a wire electrode feed drum 16 both are as well attached to a side face of the base 5 with slots 5b and 5b utilized. Various formed electrodes, such as bar, pipelike, T-shaped forms, etc., are attachable to the base 5 in addition. With this constitution, the ram electric discharge machining and the wire-cut electric discharge machining both are performable with one EDM unit.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is a method in which electrical discharge machining electrodes such as rod-shaped electrodes, pipe-shaped electrodes, and rice-shaped electrodes, and wire electrodes are attached to the machining head of one ram-type electrical discharge machining device. The present invention relates to an electric discharge machining apparatus which is constructed so that a device for supplying and recovering the electric discharge machining apparatus can be detachably attached to the electric discharge machining apparatus, and a single electric discharge machining apparatus can perform electric discharge machining and wire cut electric discharge machining.

[Conventional technology]

Electrical discharge machining equipment can be roughly divided into two types: ram-type electrical discharge machining equipment, which performs die-sinking electrical discharge machining, which uses a rice-shaped electrode to repeatedly project the shape of the electrode to machine the workpiece into a desired shape, and ram-shaped electrical discharge machining equipment, which usually uses two wire electrodes. There is a wire-cut electrical discharge machining device that is suspended between two arms of the machine and uses wire electrodes to cut a workpiece along a desired contour.

In addition, as a modification of the above-mentioned ram-type electric discharge machining, a rod-shaped, pipe-shaped, T-shaped electrode, etc. is used to connect the electrode and the workpiece to Z.
There are also machines that apply relative machining feed not only in the axial direction but also in the X-Y axis direction to perform drilling or overhanging.

[Problems that the invention attempts to confront]

In this type of electrical discharge machining, it would be very convenient if a single processing device could perform electrical discharge machining using electrical discharge machining electrodes and wire cut eccentric machining using wire electrodes, as it would allow a variety of machining to be performed on the workpiece. It is.

That is, it is very convenient, for example, when a workpiece is processed using a mold or rod-shaped electrode, and then contour processing and finishing processing are performed using a wire electrode.

For this reason, we have also proposed a device in which a machining head that can attach an electrode for electrical discharge machining and a machining head that can stretch a wire electrode are separately installed in one machining device, making it possible to perform electrical discharge machining and wire-cut electrical discharge machining. However, there was a problem in that the configuration was complicated and the device was therefore large and expensive.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention has a wire electrode guide arm attached to a base that is detachably attached to the tip of the ram of a ram-type electrical discharge machining device, and a wire electrode guide arm, 1 from among the wire electrode supply unit, wire electrode collection unit, and processing liquid nozzle.
This is achieved by providing a mounting seat to which more than one can be attached.

[For production]

By configuring as described above, one machining device can appropriately select between ram electric discharge machining using an electrode for ram electric discharge machining and wire cut electric discharge machining using a wire electrode, depending on the shape of the machined part of the workpiece. Since it is possible to proceed with machining by selecting and easily replacing electrodes, various machining processes including machining of complex shapes can be performed efficiently.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory diagram of die-sinking electrical discharge machining using a full-form electrode using the electrical discharge machining apparatus according to the present invention, and FIG. 2 shows wire cutting using a wire electrode using the electrical discharge machining apparatus according to the present invention. FIG. 3, which is an explanatory diagram when performing electrical discharge machining, is an explanatory diagram showing details of the base of the electrical discharge machining apparatus according to the present invention.

In Figures 1 to 3, 1 is a base, 2 is a column that stands vertically from the base 1, 3 is a processing arm that extends horizontally from the column 2, and 4 is a Z-axis at the tip of the processing arm 3. 5 is a base removably attached to the tip of the ram 4; 5a, 5a, 5b, and 5b are slots provided at the bottom and sides of the base 5; 6 is a general 7 is a cross slide table attached to the base 1, 8 and 9 are the above cross slide table 7.
10 is a processing tank; 11 is a stage; 12 is a motor that drives the
13 is a workpiece, 13 is a machining fluid jet supply device, 14 is a wire electrode guide arm, 15 is a wire electrode supply drum, 16
1 is a wire electrode collection drum, 17 is a capstan, 18 is a pinch roller, 19 is a brake roller, 20 is a pinch roller, 21 is a guide roller that also serves as a power supply roller, 22 is a guide roller, 23 is a wire electrode, and 24 is a workpiece It is.

First, with reference to FIGS. 1 and 3, a case will be described in which a ram electrical discharge machining electrode is attached to a base and a workpiece is subjected to ram electrical discharge machining.

In FIG. 1, a column 2 stands vertically from a base 1, a machining arm 3 extends horizontally from this column 2, and a ram 4 is attached to the tip of the machining arm 3 along the Z axis in the figure. It is attached so that it can slide freely in the direction.

The base 5 is removably attached to the tip of the ram 4, and
As shown in the figure, slots 5a are provided at the bottom and side of the base 5.
, 5a and 5b, 5b are provided, and the lower slough 5a, 5a portion of the base plate 5 constitutes a mounting seat on which a ram electric discharge machining electrode is removably attached, as is conventionally known. Further, slots 5b, 5b are provided on the side surface of the base 5, and a machining fluid jet supply device 13 is provided in this portion.
This is a new mounting seat for a ram electrical discharge machining device to which one or more of a wire electrode supply and recovery device, a wire electrode guide arm, etc. can be attached.

When attaching the full-form electrode 6 to the mounting seat of the base plate 5, bolts are attached to the slots 5a, and the electrode base is tightened and fixed with a nut or the like.

In addition to the general electrode 6, the base 5 has rod-shaped, pipe-shaped,
Electrodes of various shapes, such as T-shape, can be attached.

The machining tank IO filled with machining liquid is mounted on a cross slide table 7, and is moved in the X-Y direction in the figure by the operation of drive motors 8 and 9 of the cross slide table 7.

The workpiece 12 is mounted on a stage Il installed in the processing tank 10 using a suitable fixture.

When machining is performed by electric discharge, the drive motors 8 and 9 of the cross slide table 7 are operated to move the workpiece 12 in the X-Y direction, and the ram 4 is moved in the Z-axis direction. The molded electrode 6 is moved to a predetermined processing start position, and at that position is opposed to the workpiece 12 with a small distance therebetween.

Next, machining fluid is jetted and supplied from the machining fluid jet supply device 13 between the molded electrode 6 and the workpiece 12, and a machining voltage pulse is applied between the two from a power supply device (not shown) to create a machining gap. Electric discharge is generated, the ram 4 is moved a minute distance in the Z-axis direction, and machining feed is applied to perform electric discharge machining.

The positioning control of the machining start position, the machining feed control, the machining voltage pulses supplied from the power supply device, etc. are controlled by a control device such as an NC (not shown).

Next, with reference to FIGS. 2 and 3, a case will be described in which a wire electrode guide and units for supplying and collecting wire electrodes are attached to the mounting seat of the base and wire cut electrical discharge machining is performed.

As shown in FIGS. 2 and 3, a wire electrode guide arm 14 is attached to a mounting seat provided with a plurality of slots 5a, 5a at the bottom of the base 5, and slots 5b, 5b are attached to the sides of the base 5. A wire electrode supply drum 15 and a wire electrode recovery drum 16 are attached using the following.

A capstan 17, a pinch roller 18, a guide roller 21 that also serves as a power supply roller, a brake roller 19, a pinch roller 20, and a guide roller 22 are attached to the wire electrode guide arm 14.

The wire electrode 23 is pulled out from the wire electrode supply drum 15, passes between the capstan 17 and the pinch roller 18, and is stretched between a guide roller 21 and a guide roller 22 which also serve as power supply rollers to form a processing section. Tension is applied by a brake roller 19 and a pinch roller 20, which are rotated by a drive motor (not shown), and the wire is wound around the wire electrode recovery drum 16.

When machining is carried out, the drive motors 8 and 9 of the cross slide table 7 are operated to move the workpiece 24 in the X-Y direction, and the ram 4 is moved in the Z-axis direction to move the wire electrode. The blade is moved to a predetermined processing start position, and at that position is opposed to the workpiece 24 with a small distance therebetween.

Next, a machining voltage pulse is applied from a power supply device (not shown) between the wire electrode 23 and the workpiece 24 to generate an electric discharge in the machining gap, and while the wire electrode 23 is being renewed and fed, the cross slide table 7 and The ram 4 is moved to a minute distance and machining feed is applied to perform wire cut electrical discharge machining.

〔Effect of the invention〕

Since the present invention is configured as described above, the present invention can be applied to any type of normal electric discharge machining, and can be used for ram electric discharge machining using a ram electric discharge machining electrode with a simple configuration. , and wire-cut electric discharge machining using a wire electrode can be performed using a single processing device, so that various types of processing can be performed on a workpiece using a small and inexpensive device.

Note that the configuration of the present invention is not limited to the above-mentioned embodiments. That is, for example, in the embodiment shown in FIG. 1, the molded electrode 6 is attached to the mounting seat 5a of the base 5 and
The case where die engraving is applied to is shown, but rod-shaped, pipe-shaped, T-shaped
Attach a letter-shaped electrode, etc. to the mounting seat 5a of the base plate 5, and then attach the ram 4.
In addition to moving the table in two axial directions, it is also possible to move the cross slide table in the X-Y directions as necessary to provide processing feed and perform various desired processing on the workpiece.

In the embodiment shown in FIG. 3, the shape of the wire electrode guide arm 14, the capstan 17 attached to the wire electrode guide arm 14, the pinch roller 18,
The positions of the brake roller 19, pinch roller 20, guide rollers 21, 22, etc., and the associated wire electrodes 23
The stretching route and the like can be freely set depending on the shape and size of the workpiece 24, the part to be processed, etc.

Furthermore, the wire electrode supply drum 15 and the wire electrode recovery drum 16 can not only be attached to the wire electrode guide arm 14, but also the capstan 17 and the pinch roller 1 can be attached to the attachment of the wire electrode supply drum 15.
8 is attached to constitute a wire electrode supply unit, and on the other hand, a brake roller 19 and a pinch roller 20 are attached to the fixture of the wire electrode collection drum 16 to constitute a wire electrode collection unit. A wire electrode guide arm having a relatively simple shape having one or more guide rollers is used, and if necessary, two or more of these guide arms are attached to the mounting seats 5a and 5b, and the predetermined dimensions, A shaped wire electrode running path can be formed. Furthermore, a plurality of slots 5a, 5a are provided on the main plane of the base 5, and slots 7) 5b, 5b are formed on both sides of the base 5, and slots 5b, 5b are formed on the outer periphery of the base 5. It is also recommended that the shapes of the slots 58 and 5b, the number of slots formed in the base 5, etc. can be freely changed within the scope of the purpose of the present invention, and the present invention It encompasses all cases.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of die-sinking electrical discharge machining using a full-form electrode using the electrical discharge machining apparatus according to the present invention, and FIG. 2 shows wire cutting using a wire electrode using the electrical discharge machining apparatus according to the present invention. FIG. 3, which is an explanatory diagram when performing electrical discharge machining, is an explanatory diagram showing details of the base of the electrical discharge machining apparatus according to the present invention.

Claims (1)

[Scope of Claims] 1) A base that is removably attached to the tip of a ram of a ram-type electric discharge machining device, and a wire electrode guide arm is provided outside the mounting seat to which an electrode for electric discharge machining for ram machining can be detachably attached. , a wire electrode supply unit, a wire electrode collection unit, and a machining fluid nozzle. 2) The electric discharge machining apparatus according to claim 1, wherein the mounting seat is a slot provided on the side surface of the base.