JPS6029209A - Electric discharge machine - Google Patents

Abstract

PURPOSE:To aim at improvements in operatability and sealability ever so high, by solidifying more than two surfaces of a work tank side wall as one body, while setting these two surfaces down to a movable wall and installing a piece of elastic packing interposingly between these movable and fixed walls whereby constituting the packing to be capable of moving up and down. CONSTITUTION:U-shaped three sides of a work tank 6 are solidified in a body and set down to a movable wall 8, while an interval between the movable wall and a fixed wall 7 is sealed up by packing 9 fitly installed in a packing groove 10 of the fixed wall 7 and a bottom plate part 7. In this constitution, before a work is set to a table 5, the movable wall 8 is moved downward by an air cylinder 16, and when the front and symmetrical side walls of a work tank body 6 is opened free, the work comes possible to be taken in from any of three directions, thus setting the work to the table 5 comes easy. With this constitution, sealability comes so better and also operatability is improvable.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric discharge machining apparatus having a machining tank for storing machining fluid.

Conventionally, in this type of equipment, the machining tank is generally fixed on a table, and the machining fluid (oil, water, oil-water mixture, etc.) used for electrical discharge machining flows out to the outside and is stored as needed. The top is open, and the side walls and table are sealed.

In order to improve workability, such machining tanks have a lid door type in which a part of the side wall is completely removable, a hinged door type in which the side wall is opened and closed by pivoting the side wall with a hinge, and even a double door type in which the side wall is opened and closed. There are various forms, such as a system with a hinged door type. An elastic gasket made of rubber or the like is interposed between these doors and the processing tank body to prevent the processing fluid from flowing out from the processing tank.

In both cases, it is easy to carry in and out the workpiece and position it on the table, but in the case of the - side opening/closing door method, the work such as loading and unloading the workpiece and positioning work is carried out by the electric discharge machining equipment. limited to only from the front of the machine. In addition, in the case of a two-sided opening/closing door system, the negative side is further opened, which improves work efficiency, but the sealing of the machining fluid is more complicated than the one-sided opening/closing door system, and the seal mounting structure is more complicated. A sufficient sealing effect cannot be obtained. Furthermore, when the workpiece becomes large in size, it becomes difficult to position the workpiece with high precision only by working from two sides.

Furthermore, in numerically controlled electrical discharge machining equipment (NCEDM) that automatically attaches and detaches workpieces, the door of the machining tank is required to have a structure that is easy to open and close, and is required to open and close automatically. When the door is closed so that the liquid is stored in the tank, the arm of the automatic attachment/detachment device waits outside the door of the processing tank until the processing is completed, and the worker cannot approach it, which deteriorates work efficiency.

In this way, the automatic one-sided opening/closing door system has a simple mechanism and a sufficient sealing effect, but the workability is poor, and especially in NCEDM, the frontage of the processing tank is mostly occupied by the arm of the automatic attachment/detachment device. This reduces accessibility for workers.

In addition, in the two-sided opening/closing door system, the automatic opening/closing mechanism of the hinge Tf/Tsuzou becomes a plate axis, and sufficient seal buds cannot be obtained.

As mentioned above, the conventional devices have their own drawbacks.

The present invention has been made in order to eliminate the drawbacks of the conventional products as described above, and it is possible to integrate at least two or more walls of the main body of the processing tank.
IKW! An elastic gasket made of rubber or sponge material is interposed at the welded part of the processing tank main body to the stationary side rod to store the processing fluid, and the soil is moved along the guide plate using an actuator such as a pneumatic cylinder. The present invention also provides a processing tank for the JJJI machine, which has improved operability and sealing performance by being movable and capable of self-help attachment/detachment/fitting/interlocking.

A practical example of the present invention will be explained in Sections 1 to 4.

In the figure, (1) is a bed made of ivy, (2)
is a column, (3) is a spindle head that moves column (2) along the Y axis, and then the spindle (4) moves up and down in the direction of ZIltiI (direction J1), (5) is a table that moves bed (1)
(6) is the processing tank body which moves in the X-axis direction, and is fixed to the table (5) and stores the liquid. (7) is a fixed side wall including a bottom plate part (7') protruding from the table (5) constituting one work of the processing tank (6), and is fixed onto the table (5) via a packing or the like.

(8) is a movable side wall (9) that forms a part of the processing tank (6) and has three integrated sides and is in sliding contact with the fixed side wall (7).
> is a gasket made of rubber or sponge material that is fitted into the gasket*U[) of the fixed side wall (7) and its bottom plate (7'), and slides into contact with the inner circumferential surface a of the movable side wall (8). . (
6) is a plate provided on the top of the fixed side wall (7),
(Supports the guide rod α3 together with the table (5)) , Qe is an air cylinder fixed to the bottom of the table (5), and its piston rondo moves the movable side wall (8) up and down via the plate αη. (1 & is the table guide, (191 is the feed It's a screw.

In such a configuration, the fixed side wall (7) is attached to the bed (
1), the bed (1) is fixed in a TJ manner protruding from the width N direction (X-axis direction) as shown in Figure 2, and its bottom plate (7'
) also protrudes in the X and Y axis directions in a similar monomodal relationship. Packing pads αQ are formed at both vertical ends of the fixed square wall (7) and the peripheral edge of the bottom plate (7'), and the padding (9) fitted into this groove Qυ is Movable side wall (8
) is in sliding contact with the inner circumferential surface 0]), and the machining fluid is sealed and stored fluid-tightly. In addition, the moving side wall (8) of 5J is guided by guide rods α4 supported on both sides of the fixed side wall (7), and the moving side wall (8) of the fixed side wall (7)
11 The positional relationship with respect to the wall (7) can be maintained at a constant level, and the amount of compressive deformation of the inner circumferential surface aη with respect to the packing (9) can be always kept constant.
[It can also prevent deformation of the 444 side wall (87).In addition, the mouth 4 motion%tll wall (8) is guided by the guide rod q rule through hole contact bearings (l) disposed above and below on both sides. So, make sure that the vertical movement is smooth.

The vertical movement of this movable #J side wall (8) is controlled by an air cylinder (lt
i:, but it is also possible to use another actuator, such as a hydraulic cylinder or a manual feed mechanism consisting of a feed screw and a handle.Furthermore, when F %jl, the movable side wall (8) The upper and lower limits are set using air cylinders (i
At the end of the stroke of q, each is offshore, and the 1 ma 1 that touches the Sen is
A target stopper is no longer necessary.

In this way, before mounting the workpiece on the table ((
When the movable side wall (8) is moved downward with the air cylinder OQ, the front and left and right sides of the processing tank body (6) are opened, and the workpiece can be carried in from any of the three directions.
F, and it can be attached to the table (5) from three directions. Subsequently, work that requires high precision, such as positioning between the electrode and the workpiece, can be performed with good viewing angles from three directions, resulting in improved workability.

In addition, even if the machine body of the workpiece by a robot or the like, the arm of the attaching/detaching device, etc. is waiting and occupying the - side of the processing tank ((+), the above-mentioned work can be performed more easily than the other two sides. Furthermore, since the table (5) that has identified the processing tank (6) can be moved in the X-axis direction without interfering with the bed (1), the above-mentioned positioning work can be made more reliable. .

In addition, regardless of the vertical position of the movable side wall (3), the seal of the stored machining fluid is applied to the inner peripheral surface α and the rear IJj pressure between the inner circumferential surface α and the packing (9). (Since the pressure is always 1tC-U and 141N, it exhibits a stable sealing function and does not leak to the outside. This improves the working environment around the machine body, and also improves the working environment for workers. Accessibility to the main body of the machine is also improved.8 Furthermore, the movable side wall (8) can be moved up and down only to move the processing tank (
6) Since the door opens and closes, there is no turning movement of the door unlike the conventional hinged door opening/closing type, so the installation area can be substantially reduced.

Note that the same effect can be obtained by using a sliding bearing or other type of bearing in place of the ball contact bearing α which cooperates with the guide rod to guide the movable side wall (8).

As explained above, according to the present invention, the processing tank main body is composed of a fixed side wall and a movable side wall, and the movable side wall is moved up and down by slidingly contacting the fixed side wall via an elastic packing, so that workpieces can be carried in. - It is extremely easy to carry out, and high-precision work such as positioning between the electrode and the workpiece can be performed efficiently.

Moreover, the machining fluid can be stored with excellent sealing properties. In addition, it is easier to link the automatic attachment/detachment device for the workpiece with the electrical discharge machining device, and since there is no opening/closing mechanism like in the past, the area required for opening/closing can be eliminated, and the installation area can be reduced substantially. Less -t-tr effect 0

[Brief explanation of drawings]

Fig. 1 is a cross-sectional perspective view showing one embodiment of the present invention, Fig. 2 is a front sectional view thereof, and Fig. 6 is a guide rod α of the fixed side wall (7).
There is a front sectional view at 4 positions, and Fig. 4 is a cross sectional view. (1) Bed of electrical discharge machining equipment, (2) Column, (3) Spindle head, (4) Spindle, (5
)...Table, (6)...Machining tank body, (7)...
・Fixed side wall, (7')... Bottom plate part of fixed side wall, (8)
... b] Moving side wall, (9) - ... Elasticity, < Tsukin, Oa
...Packing groove, θυ...Inner peripheral surface of movable side wall, 0...Guide rod support plate, a...Guide rod, a
◆...Guide rod bearing support, 05...Ball contact bearing, αQ...Air cylinder, α-ri...
...Extra issue is on the board, 08...Table guide, (1'i1
...Table feed screw. Agent Masuo Oiwa Figure 1 Figure 2 Figure 4

Claims (1)

[Claims] (1) In an electrical discharge machining device that performs electrical discharge machining with an insulating machining fluid interposed between an electrode and a workpiece, the electrode or the workpiece is attached to a daple that fixes the workpiece, The machining tank for storing the machining fluid is equipped with an identification side wall fixed to the table and a movable side wall that integrates two or more side walls, and the front side wall is attached to the fixed side wall via an elastic packing. An electrical discharge machining device whose main feature is to make sliding contact and to excite a -1-n driving side wall along a guide rod by an actuator. (Patent d in which the two-actuator is composed of a pneumatic cylinder)
F$ range lff1g': Item 1 Airan electrical discharge machining equipment. (3) Move the movable side wall vertically! Processing tank to be guided
The ball contact bearing that fits into the guide village installed in 111 is movable 11! The electrical discharge machining apparatus according to claim 1 or 2, characterized in that it is disposed on both sides and above and below the wall.