JP3520686B2 - Electric discharge machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric discharge machine such as a die-sinking electric discharge machine and a wire electric discharge machine, and more particularly to an electric discharge machine in which a machining tank for storing a machining liquid moves up and down. is there.

[0002]

2. Description of the Related Art As a conventional electric discharge machine, a die-sinking electric discharge machine equipped with a machining tank door for taking in and out a workpiece will be described as an example. FIG. 9 is a side view including a partial cross section of a conventional ram type electric discharge machining apparatus capable of vertically moving a machining tank. 10 is a cross-sectional view of a main part of the conventional electric discharge machine shown in FIG. 9 showing a state where the sealing portion of the machining tank is raised and lowered, and FIG. 11 is a machining tank of the conventional electric discharge machine shown in FIG. FIG. 12 is a cross-sectional view of a main part showing a state at the time of electrical discharge machining in the sealed portion of FIG. 12, and FIG.

In FIG. 9, an electric discharge machine body 1 having a mechanical structure for performing electric discharge machining on a workpiece 19 has a function of electric discharge machining, and stores and supplies a machining liquid OL described later. Means a mechanical system device that does not have the machining fluid supply device 12 that operates, and a machine that includes the electric discharge machine body 1 and the machining fluid supply device 12 that stores and supplies the machining fluid OL is called an electric discharge machine. . On the bed 2, which is the basic structure of the electric discharge machine body 1, the work piece 1
A table surface plate 3 for mounting the table 9 and a column 5 for supporting the shaft driving portion are provided. A saddle 6 that can move in the X-axis direction (front-back direction in the figure = front-back direction) is arranged above the column 5, and a ram 7 that moves in the Y-axis direction (left-right direction) is further arranged thereon. Has been done. A head 8 that can move in the Z-axis direction (up and down direction) is attached to the tip of the ram 7. An electrode 9, which is a tool for performing electric discharge machining, is attached to the lower portion of the head 8. A processing tank 4 for storing the processing liquid OL is provided around the table surface plate 3, and a sealing member 16 as a sealing material for preventing leakage of the processing liquid OL is provided below the processing tank 4. An actuator 17 is attached for pressing against the inner wall of the processing tank 4. A recovery box 15 for recovering the processing liquid OL leaking from the processing tank 4 is provided below the bed 2. A pipe 18 for returning the collected working fluid OL to the working fluid supply apparatus 12 is connected between the working fluid supply apparatus 12 that stores and supplies the working fluid OL and the recovery box 15. The machining liquid supply device 12 is provided with a machining liquid transport pump 13 that supplies the machining liquid OL into the machining tank 4 and a temperature control device 14 that controls the temperature of the machining liquid OL. The bed 2 is supported on a pad 10 placed on the floor by leveling bolts 11 for adjusting the mechanical level. The leveling bolt 1 attached to the bed 2
1 supports the machine main body, that is, the electric discharge machine main body 1, on the pad 10, whereby the level of the machine can be adjusted.

10 to 12, a seal member 16 is attached to the table surface plate 3, and the pressing force is controlled by vertically moving a rod of an actuator 17 attached to the bed 2. As shown in FIG. 12, the free end of the seal member 16 attached to the table surface 3 is opposed to the linear portion of the inner surface of the processing tank 4, and the corner seal is always in contact with the inner surface corner portion of the processing tank 4. A member 20 is provided. The corner sealing member 20 is arranged on the table surface plate 3 side and is in close contact with the inner surface of the processing tank 4 to ensure the sealing property. Therefore, FIG.
In the state of raising and lowering the sealing portion of the processing tank 4 shown in (1), the actuator 17 descends and a gap is formed between the inner surface of the processing tank 4 and the self-elastic force of the seal member 16. However, in the state of electric discharge machining in the sealing portion of the machining tank 4 shown in FIG. 11, the actuator 17 moves up, and the seal member 16 attached to the table surface plate 3
Is crushed and deformed by the actuator 17 attached to the bed 2, and is in close contact with the inner surface of the processing tank 4. When the seal member 16 attached to the table surface plate 3 is crushed by the actuator 17 and is in close contact with the inner surface of the processing tank 4, the machining liquid OL in the processing tank 4 is not only in contact with the seal member 16 and the inner surface of the processing tank 4. Due to the close contact state, the sealing property is secured, and there is no leakage from the sealing portion between the sealing member 16 and the inner surface of the processing tank 4.

Next, the operation of the conventional electric discharge machine will be described. The saddle 6 moves on the column 5 in the X-axis direction. The ram 7 moves on the saddle 6 in the Y-axis direction. The head 8 moves on the ram 7 in the Z-axis direction. Thereby, the electrode 9 attached to the lower portion of the head 8 can be moved to an arbitrary three-dimensional position. On the other hand, the table surface plate 3 is fixed on the bed 2 and does not move. Further, the work piece 19 fixed to the table surface plate 3 is also in a fixed state. The position of the processing tank 4 can be moved up and down (moved) up and down, and at the time of setup such as attachment work of the workpiece 19, the processing tank 4 is lowered to the height of the table surface plate 3 to improve its workability. You can At the time of electric discharge machining, by raising the machining tank 4 and ensuring its depth, the machining liquid O
L can be filled around the work piece 19.

The machining fluid OL supplied from the machining fluid supply device 12 into the machining tank 4 by the machining fluid transport pump 13 is supplied to the electrode 9
The electric discharge machining can be performed by interposing it between the workpiece 19 and the workpiece 19. When the processing tank 4 is filled with the processing liquid OL, the seal member 16 is pressed by the actuator 17 to deform the sealing member 16, thereby ensuring the sealing performance of the processing tank 4. The temperature of the heat generated by the processing is controlled by the temperature control device 14 via the processing liquid OL. The machining fluid OL that leaks during machining is collected in the collection box 15 and returned to the machining fluid supply device 12 through the pipe 18. When the workpiece 19 is removed after processing, the pressing force of the actuator 17 is released and the sealing property of the sealing member 16 is released, so that the processing liquid OL in the processing tank 4 is drawn to the collection box 15 side. be able to. After draining the processing liquid OL, the processing tank 4 can be lowered to take out the workpiece 19.

Normally, the seal member 16 is made of a synthetic rubber material having high elasticity and high sliding resistance, and is attached to the table surface plate 3 by adhesion or the like. Processing tank 4
The force of the actuator 17 is released at the time of raising and lowering, and the seal member 16 forms a gap with the inner surface of the processing tank 4. In addition, during electric discharge machining, the seal member 16 attached to the table surface plate 3 is attached to the actuator 1
It is crushed by 7 and squeezes out to the outside, and adheres to the inner surface of the processing tank 4, thereby preventing leakage of the processing liquid OL. In particular, the straight portion of the sealing portion of the processing tank 4 is
The corner portion of the inner surface of the processing tank 4 is a functional region of the corner sealing member 20 processed according to the corner shape.
However, it is always in close contact with the inner surface of the machining tank 4 both during electric discharge machining and when the machining tank 4 is moved up and down.

FIG. 13 is a side view including another partial cross section of an electric discharge machine having a function of storing a machining liquid in a bed and a column in another conventional example. In the figure, the same reference numerals and symbols as those of the conventional example indicate the same or corresponding structural parts as those of the conventional example, and therefore, redundant description will be omitted. In FIG. 13, a saddle 6 that can move in the Y-axis direction is mounted on a bed 2 that is a basic structure of the electric discharge machine main body 1. A table 24 which can move in the X-axis direction is arranged on the table. Table 2
A table surface plate 3 for mounting the work piece 19 on the table 4.
Is attached, and a processing tank 4 for storing the processing liquid OL is provided around it. An opening / closing door 25 is attached to the front surface of the processing tank 4 for facilitating the taking in and out of the workpiece 19. Further, a column 5 is attached to the bed 2 and supports a head 8 for moving an electrode 9 which is a tool for electric discharge machining in the Z-axis direction. The bed 2 and the column 5 have an internal space for accommodating the working liquid OL and have a function of storing and supplying the working liquid OL. The bed 2 is provided with a working liquid transfer pump 13 for pumping the working liquid OL from the bed 2 side to the column 5 side. Between the processing tank 4 and the column 5, there is a supply electromagnetic valve 26 for supplying the processing liquid OL, and between the processing tank 4 and the bed 2 is a discharge electromagnetic valve 27 for discharging the processing liquid OL.
The bed 2 is supported on a pad 10 placed on the floor by leveling bolts 11 for adjusting the mechanical level.

Next, the operation of this conventional electric discharge machine will be described. Table 24 and saddle 6 are each X
It moves in the axial and Y-axis directions. The workpiece 19 is attached to the table 24 via the table surface plate 3. Thereby, the work piece 19 can be moved to an arbitrary position. Further, the electrode 9 attached to the head 8 can move in the Z-axis direction. Processing fluid OL for bed 2 and column 5
Is provided, the machining liquid OL in the bed 2 is carried to the column 5 by the transport pump 13.
It is stored and the processing tank 4 is opened by opening the supply solenoid valve 26.
The machining liquid OL is supplied to the. As a result, electric discharge machining can be performed via the machining liquid OL filled in the machining tank 4. The discharge of the working fluid OL is returned to the bed 2 side by opening the discharge solenoid valve 27. The work piece 19 is attached and detached by opening the open / close door 25 provided on the front surface of the processing tank 4.

[0010]

In the former prior art,
The height of the collection box 15 cannot be made higher than that of the table surface plate 3, and the machining fluid supply device 12 communicated with it also
The height of the collection box 15 could not be made higher than the height. Therefore, the capacity of the machining liquid supply device 12 must be increased by expanding the area in the horizontal direction, and the installation area of the entire electric discharge machining device is widened, resulting in an increase in size of the device. Further, in the former conventional technique, the machining liquid O during electric discharge machining is used.
The leakage recovery of L is performed by the pipe 18 through the machining fluid supply device 12
Since the processing liquid OL is returned to the above, if the leakage amount of the processing liquid OL is large, the processing liquid OL will overflow from the recovery box 15. Therefore, it is necessary to determine the total amount of the machining fluid depending on the volumes of the recovery box 15 and the machining fluid supply device 12. If the total amount of the machining fluid is made larger than the volumes of the recovery box 15 and the machining fluid supply device 12, it is necessary to reduce the leakage amount of the machining fluid OL, and in order to reduce the leakage amount of the machining fluid OL, the machining tank 4 is required.
It is necessary to increase the contact pressure between the inner surface of the processing member and the seal member 16, and the sliding resistance for moving up and down the processing tank 4 becomes large, which hinders the vertical movement of the processing tank 4. On the other hand, in order to reduce the sliding resistance, if the structure is such that the sealing member 16 does not come into contact with the working tank 4 when moving up and down, the number of parts increases, and the device and its manufacturing cost increase.

In the latter prior art, bed 2 and column 5
Since the machining liquid OL is stored in two locations, when the machining liquid OL leaks in the machining tank 4, the machining liquid OL may leak to the outside. Further, the door opening / closing processing tank 4 also has a problem in operability including setup such as attachment and detachment of the workpiece 19.

[0012] Therefore, an object of the present invention is to provide an electric discharge machining apparatus which is space-saving, has a simple structure, is inexpensive in manufacturing cost, and prevents the machining fluid from leaking to the outside.

[0013]

According to a first aspect of the present invention, there is provided an electric discharge machine apparatus having a mechanical structure having a mechanical structure for performing electric discharge machining on a workpiece, and an electric discharge machine body having the electric discharge machine machined during the electric discharge machining. An electric discharge machining apparatus comprising: a machining tank that stores a liquid, which can be moved up and down; and a machining liquid supply device that supplies the machining liquid to the machining tank of the electric discharge machine body and stores the machining liquid discharged from the machining tank. The electric discharge machine body is installed inside the machining fluid supply device.

According to a second aspect of the present invention, there is provided an electric discharge machine, wherein the electric discharge machine body according to the first aspect is installed inside the machining fluid supply device, and the inside of a bed structure constituting the electric discharge machine body. Also, the processing liquid is stored.

According to a third aspect of the present invention, there is provided an electric discharge machine having an electric discharge machine main body having a mechanical structure for performing electric discharge machining on a workpiece, and an electric discharge machine main body having upper and lower sides for storing a machining liquid during the electric discharge machining. An electric discharge machining apparatus comprising: a machining tank that can be raised and lowered and a machining fluid supply device that supplies the machining fluid to the machining tank of the electric discharge machine body and stores the machining fluid discharged from the machining tank. Is integrated with the structure of the bed constituting the main body of the electric discharge machine, and
It is formed on the outer periphery of the electric discharge machine body.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an electric discharge machine according to an embodiment of the present invention will be described with reference to the drawings. Note that the basic configuration of the entire electric discharge machine is common to the conventional electric discharge machine and each of the embodiments, and a duplicate description will be omitted.

Embodiment 1. FIG. 1 is a configuration diagram including a partial cross section of an electric discharge machine according to a first embodiment of the present invention. In FIG. 1, first,
Throughout the present invention and all the embodiments, the electric discharge machine body 1 means a machine device body having a function of electric discharge machining, which does not have a machining liquid supply device for storing and supplying the machining liquid OL. A machine equipped with the electric discharge machine body 1 and a machining liquid supply device for storing and supplying the machining liquid OL will be referred to as an electric discharge machining device. On the bed 2 which is the basic structure of the electric discharge machine main body 1 not including the machining liquid supply device 30, the table surface plate 3 for mounting the work piece 19 and the column 5 for supporting the shaft driving portion are arranged. There is. A saddle 6 that can move in the X-axis direction (front-back direction in the figure = front-back direction) is arranged above the column 5, and a ram 7 that can move in the Y-axis direction (left-right direction) is further arranged thereon. Has been done. A head 8 that can move in the Z-axis direction (up and down direction) is attached to the tip of the ram 7. An electrode 9, which is a tool for performing electric discharge machining, is attached to the lower portion of the head 8. A processing tank 4 for storing the processing liquid OL is provided around the table surface plate 3, and a sealing member 16 is provided below the table surface plate 3 as a sealing material for preventing leakage of the processing liquid OL. , The sealing member 16 to the processing tank 4
An actuator 17 for pressing against the inner wall of the is attached. A processing liquid supply device 30 for collecting the processing liquid OL leaking from the processing tank 4 is provided below the bed 2. The processing liquid supply device 30 stores and supplies the processing liquid OL. The processing liquid supply device 30 has a container shape that accommodates the entire lower portion of the bed 2. That is, the electric discharge machine body 1 is installed in the machining fluid supply device 30, and the machining fluid supply device 30 has a shape to accommodate the lower portion of the conventional electric discharge machine body 1. The machining fluid supply device 30 supplies the machining fluid OL into the machining tank 4 and the machining fluid OL.
A temperature controller 14 is provided to control the temperature of the.
The bed 2 is supported by a leveling bolt 11 for adjusting a machine level on a pad 10 placed on the floor. Particularly, for adjusting the level of the machine, a machining liquid supply device 30 is used.
The leveling bolt 11 has a level adjusting function as in the prior art by providing the leveling bolt 11 at the bottom thereof. A seal member 16 is attached to the table surface plate 3 of the present embodiment, and an actuator 17 attached to the bed 2 is provided.
The rod is vertically controlled to move, and has the structure described in the conventional example. That is, the free end of the seal member 16 attached to the table surface plate 3 faces the straight portion of the inner surface of the processing tank 4, and the corner sealing member 20 is constantly in contact with the inner corner portion of the processing tank 4 (see FIG. 12). (See) is provided. The corner sealing member 20 is arranged on the table surface plate 3 side and is in close contact with the inner surface of the processing tank 4 to ensure the sealing property.

In the electric discharge machine of the embodiment having such a configuration, the electric discharge machine body 1 is installed inside the machining liquid supply device 30 for storing and supplying the machining liquid OL.
When not performing electrical discharge machining during setup, etc., the machining fluid O
L is stored in the processing liquid supply device 30. Workpiece 1
When the electric discharge machining is performed after the setup such as the attachment of 9 is completed, the machining tank 4 is raised and the machining liquid OL is filled in the machining tank 4.
At this time, the working liquid OL is sent from the working liquid supply device 30 by the transfer pump 13 and cooled by the temperature control device 14. The working fluid OL leaked from between the working tank 4 and the seal member 16 while the working fluid OL is being filled in the working fluid 4 is collected by the working fluid supply device 30 immediately below. At this time, the space between the bed 2 and the processing liquid supply device 30 is a space for containing the processing liquid OL, so that a large plane area is obtained by the gap between the two, and as a result, the size of the entire device is increased. It is possible to increase the volume of the working fluid OL accommodated therein. In addition,
In order to facilitate the cleaning of the inside of the machining fluid supply device 30, a bottom surface of the machining fluid supply device 30 is attached to the front side of the electric discharge machine body 1, that is, to the left side of the drawing, for example, and a releasable door is attached. By inclining the bottom surface such as lowering the left side and raising the right side, it becomes easy to clean the electric discharge dust and sludge in the machining liquid supply device 30. Further, the side plate and the bottom plate forming the four side surfaces of the working liquid supply device 30 can be formed into a panel, which is convenient for assembly, disassembly, and handling.

As described above, in the electric discharge machine according to the present embodiment, the electric discharge machine body 1 having a mechanical structure for performing electric discharge machining on the workpiece 19 and the electric discharge machine body 1 at the time of electric discharge machining are used for machining. The machining liquid 4 is stored in the machining tank 4 that stores the liquid OL and can be moved up and down, and the machining tank 4 of the electric discharge machine body 1.
And a machining fluid supply device 30 for storing the machining fluid OL discharged from the machining tank 4, and the electric discharge machine body 1 is installed inside the machining fluid supply device 30. Therefore, the bed 2 of the electric discharge machine main body 1 and the machining fluid supply device 3
Since the space between 0 and 0 is a storage space for the working fluid OL, a large plane area is obtained due to the gap between the two, and the storage volume for the working fluid OL can be increased without increasing the size of the entire apparatus. Further, even when the sealing property of the processing tank 4 cannot be sufficiently secured, the processing liquid OL can be stored in the processing liquid supply device 30 without leaking outside. Therefore, it is space-saving, its structure is simple, and its manufacturing cost is low.
The working fluid does not easily leak to the outside.

Embodiment 2. FIG. 2 is a configuration diagram including a partial cross section of an electric discharge machine according to a second embodiment of the present invention. In the drawings, the same reference numerals and symbols as those in the above-mentioned embodiment indicate the same or corresponding constituent parts as those of the above-mentioned embodiment.
Here, overlapping description will be omitted and only the differences will be described. In FIG. 2, the electric discharge machine body 1 is installed inside a machining liquid supply device 31 that stores and supplies the machining liquid OL. The inside of the structure of the bed 2 is hollow, and the inside of the structure of the bed 2 communicates with the outside by a side through hole 1a on the side surface and a bottom opening 1b on the bottom surface. In addition, the cavity inside the structure of the bed 2 is
The inclined surface 1c is formed so that discharge dust and sludge settled from the upper portion are hard to collect. The cavity inside the structure of the bed 2 communicates with the machining liquid supply device 31 by the side through hole 1a and by the bottom opening 1b. Thereby, the working fluid OL in the working fluid supply device 31 can enter the inside of the bed 2, and the volume inside the bed 2 can be used as the volume of the working fluid supply device 31. Therefore, in the present embodiment, since the electric discharge machine main body 1 is installed inside the machining liquid supply device 31 that stores and supplies the machining liquid OL, when the electric discharge machining is not performed during setup, etc. The liquid OL is stored in the working liquid supply device 31. When electric discharge machining is performed after the setup such as attachment of the workpiece 19 is completed, the machining tank 4 is raised.
The working fluid OL is filled therein. At this time, the machining liquid OL is sent from the machining liquid supply device 31 by the transport pump 13 and cooled by the temperature control device 14. The working fluid OL leaked from between the working tank 4 and the seal member 16 while the working fluid OL is being filled in the working fluid 4 is collected by the working fluid supply device 31 immediately below. At this time, the inside of the structure of the bed 2 is a cavity and a space for accommodating the machining liquid OL between the machining liquid supply device 31 and a large volume is obtained due to the gap between the two, and as a result, the size of the entire device is increased. The storage volume of the working liquid OL can be increased without increasing the height.

In order to facilitate the cleaning of the inside of the machining liquid supply device 31, a bottom surface inside the machining liquid supply device 31 is attached to the front side of the electric discharge machine main body 1, that is, the left side in the figure, and a releasable door is attached. By lowering the left side in the figure and raising the right side, it becomes easier to clean the discharge dust, sludge and the like in the machining fluid supply device 31. In addition, 4 on the side surface of the processing liquid supply device 31
The side plate and the bottom plate forming the surface can be formed into a panel to facilitate the handling such as assembly and disassembly. In particular,
In the present embodiment, the space between the bed 2 and the machining fluid supply device 31 is set up to the rear part of the electric discharge machine body 1, but in the case of implementing the present invention, the structure of the bed 2 is set. Since a large space is obtained by the internal cavity, it is possible to eliminate the space between the bed 2 at the rear part (right side in FIG. 2) of the electric discharge machine body 1 and the machining liquid supply device 31. Also,
In order to facilitate cleaning of the inside of the machining liquid supply device 31, for example, the machining liquid supply device 31 is inclined by inclining the bottom face so that the left side of the bottom face of the machining liquid supply device 31 is lower and the right side of the bottom face is higher. It becomes easy to clean the discharge dust and sludge inside. In addition, the side plate and the bottom plate forming the four side surfaces of the working liquid supply device 31 can be formed into a panel to facilitate the assembly, disassembly, and handling.

As described above, in the electric discharge machine of this embodiment, the electric discharge machine main body 1 having a mechanical structure for performing electric discharge machining on the workpiece 19 and the electric discharge machine body 1 at the time of electric discharge machining The machining liquid 4 is stored in the machining tank 4 that stores the liquid OL and can be moved up and down, and the machining tank 4 of the electric discharge machine body 1.
And a machining fluid supply device 31 that stores the machining fluid OL discharged from the machining tank 4, and the electric discharge machine body 1
Is installed inside the machining fluid supply device 31, and the machining fluid OL is also stored inside the structure of the bed 2 that constitutes the electric discharge machine main body 1. Therefore, the inside of the structure of the bed 2 serves as a storage space for the machining liquid OL, and the space between the bed 2 of the electric discharge machine main body 1 and the machining liquid supply device 31 serves as a storage space for the machining liquid OL. A large storage volume is obtained by the space, and the storage volume of the processing liquid OL can be increased without increasing the size of the entire apparatus.
Further, even when the sealing property of the processing tank 4 cannot be sufficiently secured, the processing liquid OL can be stored in the processing liquid supply device 31 without leaking outside. Therefore, the accommodation space for the working fluid OL can be effectively utilized inside the structure of the bed 2, the space is saved, the structure is simple, the manufacturing cost is low, and the working fluid is unlikely to leak to the outside.

Embodiment 3. FIG. 3 is a configuration diagram including a partial cross section of an electric discharge machine according to a third embodiment of the present invention. In the drawings, the same reference numerals and symbols as those in the above-mentioned embodiment indicate the same or corresponding constituent parts as those of the above-mentioned embodiment.
Here, overlapping description will be omitted and only the differences will be described. The bed 2 of the electric discharge machine main body 1 has a function of a machining liquid supply device that stores and supplies the machining liquid OL on the outer periphery thereof, and the bed 2 maintains the performance such as strength as its structure while maintaining the machining liquid. It is possible to store and supply OL. That is, the bed 2 is composed of a bed body portion 2A which is a bed of the electric discharge machine body 1 and a storage wall 33a which forms a machining liquid supply device 33 capable of storing and supplying the machining liquid OL on the outer periphery thereof. Are integrally cast-molded. The processing liquid supply device 33 determines the installation of the storage wall 33a so as to secure the storage volume of the processing liquid OL. Electric discharge machine body 1
The working fluid supply device 33 that stores and supplies the working fluid OL formed on the outer periphery of the bed body portion 2A of No. 2 has the bottom surface inclined so that the predetermined position is the lowermost position, and It is also possible to facilitate the cleaning of discharge dust and sludge. The level of the machine can be adjusted from the outside by providing the mounting position of the leveling bolt 11 on the outer peripheral portion of the bed 2.

The electric discharge machine body 1 is installed inside a machining liquid supply device 30 for storing and supplying the machining liquid OL.
Around the bed 2 which is the basic structure, a deep substantially U-shaped fixing member 41 at the bottom when viewed from above the electric discharge machine main body 1 is attached in a sealed state with the bed 2, and further, a deep substantially U-shaped shape. As for the fixing member 41, a substantially U-shaped fixing member 41 having a shallow upper portion is attached to the bed 2 from the upper surface of the bed 2 to a part of the front surface of the column 5. Fixing member 41
The front surface on the bed 2 side and the both side surfaces on the bed 2 and column 5 side are smooth flat surfaces from the upper end to the lower end of the fixing member 41. In the machining tank 4 (see FIG. 5 for details), a shallow U-shaped fixing member 41 at the upper portion forms a back surface 41A and a bottom surface 41B, and the front surface and both side surfaces are the electric discharge machine body 1
A movable member 43 having a substantially U-shape when viewed from above is formed, and part of these fixed members 41 and the movable member 43 form the machining liquid OL.
The working fluid OL can be stored between the fixed member 41 and the movable member 43. In addition,
The structure of the processing tank 4 will be described in detail with reference to FIG.

In this type of embodiment, the bed body 2
Since the machining liquid supply device 33 is provided on the outer peripheral portion of A, maintenance such as removal of machining chips generated during machining is possible. Further, since the bed main body 2A and the machining liquid supply device 33 on the outer peripheral portion thereof are integrally formed by casting, the possibility of leakage of the machining liquid OL from the machining liquid supply device 33 is small. Further, in the present embodiment, the inside of the structure of the bed main body 2A is not used as a storage space for the working liquid OL, but when the present invention is implemented, the inside of the structure of the bed main body 2A stores the working liquid OL. It can also be a space. At this time, the inside of the structure of the bed 2 serves as a storage space for the machining liquid OL, and the bed 2 of the electric discharge machine main body 1 and the machining liquid supply device 33 serve as a storage space for the machining liquid OL. Gives a large storage volume,
It is possible to increase the storage volume of the working liquid OL without increasing the size of the entire apparatus.

As described above, in the electric discharge machine according to the present embodiment, the electric discharge machine body 1 having a mechanical structure for performing electric discharge machining on the workpiece 19 and the electric discharge machine body 1 at the time of electric discharge machining The machining liquid 4 is stored in the machining tank 4 that stores the liquid OL and can be moved up and down, and the machining tank 4 of the electric discharge machine body 1.
And a processing liquid supply device 33 for storing the processing liquid OL discharged from the processing tank 4 and storing the processing liquid OL.
3 is formed integrally with the structure of the bed 2 that constitutes the electric discharge machine main body 1 and on the outer periphery of the electric discharge machine main body 1. Therefore, the bed main body 2A of the electric discharge machine main body 1 and the storage wall 33a on the outer peripheral portion of the bed main body 2A.
Since the machining fluid supply device 33 formed between the and is the accommodation space for the machining fluid OL, a large accommodation volume is obtained by both accommodation spaces, and the machining fluid OL is accommodated without increasing the size of the entire apparatus. The volume can be increased. Further, even when the sealing property of the processing tank 4 cannot be sufficiently secured, the processing liquid OL can be stored in the processing liquid supply device 33 without leaking outside. Therefore, the bed main body 2 of the electric discharge machine main body 1
The machining liquid OL is formed by the machining liquid supply device 33 formed between A and the storage wall 33a of the outer peripheral portion of the bed main body 2A.
The storage space can be effectively used, the space is saved, the structure is simple, the manufacturing cost is low, and the working fluid is unlikely to leak to the outside.

Fourth Embodiment Figure 4 is a diagrammatic view including a partial section of the discharge machining apparatus according to a reference embodiment of the present invention, FIG 5 is a detailed view of the processing tank portion of the electric discharge machining apparatus according to a reference embodiment of the present invention. In the drawings, the same reference numerals and symbols as those in the above-mentioned embodiment indicate the same or corresponding components as those in the above-mentioned embodiment, and therefore, duplicate description will be omitted here, and only the differences will be described. To do. 4 and 5, the electric discharge machine main body 1 is installed inside a machining fluid supply device 30 that stores and supplies the machining fluid OL. Around the bed 2 which is the basic structure, a deep substantially U-shaped fixing member 41 at the bottom when viewed from above the electric discharge machine main body 1 is attached in a sealed state with the bed 2, and further, a deep substantially U-shaped shape. Fixing member 41
In the upper part of the front surface of the column 5 from the upper surface of the bed 2, a substantially U-shaped fixing member 41 having a shallow upper part is attached to the bed 2 in a sealed state. The front surface of the fixing member 41 on the bed 2 side and both side surfaces of the fixing member 41 on the bed 2 and column 5 side are
The flat surface is from the upper end to the lower end. Processing tank 4
Is a U-shaped fixing member 41 having a shallow upper surface and a rear surface 41.
A and a bottom surface 41B are formed, and a front surface and both side surfaces of the electric discharge machine main body 1 are formed into a substantially U-shaped movable member 43. A part of the fixed member 41 and the movable member 43 form the machining liquid OL. The fixing member 41 constitutes the entire volume to be accommodated.
The machining liquid OL can be stored between the movable member 43 and the movable member 43.

A substantially U-shaped movable member 4 constituting the processing tank 4.
3, a seal member 42 made of an elastic material that prevents leakage of the working fluid OL between itself and the fixing member 41.
Is provided in a U shape when viewed from above and in an L shape when viewed from the side. By this seal member 42, the substantially U-shaped movable member 43 and the fixed member 41 are brought into close contact with each other, and the sealing property of the processing tank 4 is maintained. Therefore, even when the processing tank 4 moves up and down, that is, even when the substantially U-shaped movable member 43 moves up and down, the seal member 42 is always in contact with the surface of the fixed member 41 to maintain the sealing property. The processing liquid OL in the processing tank 4 can be stored regardless of the position of the tank 4. Also,
Since the electric discharge machine body 1 is installed inside the machining fluid supply device 30, the machining fluid can be reliably collected. Particularly, in the present reference embodiment, the seal member 42 is continuously provided inside the substantially U-shaped movable member 43 serving as the processing tank 4 in a U-shape when viewed from above and in an L-shape when viewed from a side surface.
Since the entire sealing property is obtained and the sealing member 42 itself has no discontinuity, good sealing property is obtained. Further, the seal member 42 serves as the processing tank 4, and a substantially U-shaped movable member 43.
When is moved down, the three upper surfaces of the bed 2 are released, and the work piece 19 can be easily set up and removed from the table surface plate 3. Therefore, the electric discharge machine body 1
Is installed inside the machining fluid supply device 30, the machining fluid can be reliably collected, the space is saved, the structure is simple, the manufacturing cost is low, and the machining fluid OL is external. Hard to leak to.

[0029] Thus, in the electric discharge machining apparatus of the present reference embodiment, the processing at the time of electric discharge machining and electric discharge machine main body 1 having a mechanical structure for performing electric discharge machining on the workpiece 19, the electric discharge machine main body 1 having The machining liquid 4 is stored in the machining tank 4 that stores the liquid OL and can be moved up and down, and the machining tank 4 of the electric discharge machine body 1.
And a machining liquid supply device 30 that stores the machining liquid OL discharged from the machining tank 4, and the vertically movable machining tank 4 covers the bed 2 and the column 5 in a substantially U-shape when viewed from above. At the same time, a stepped portion for arranging the table surface plate 3 on the upper surface of the bed 2, that is, a bottom surface 41B is formed, and the fixing member 41 having three flat surfaces that cover the substantially U-shape and the bed 2 in the substantially U-shape. A substantially U-shaped movable member 43 that slides by overlapping the three surfaces that cover and the two surfaces that cover the column 5 in a substantially U shape, and a seal member 42 that is interposed between the fixed member 41 and the movable member 43. It is a thing. Therefore, inside the substantially U-shaped movable member 43 forming the processing tank 4, the seal member 42 made of an elastic material for preventing the leakage of the processing liquid OL between the stationary member 41 and the fixed member 41 has a substantially U-shaped shape. Since the movable member 43 and the fixed member 41 are in close contact with each other and the sealing property of the processing tank 4 is maintained, even if the processing tank 4, that is, the substantially U-shaped movable member 43 moves up and down, the sealing member 42 is always kept. Since the surface of the fixing member 41 is contacted and the sealing property is maintained, the processing liquid OL in the processing tank 4 can be stored regardless of the position of the processing tank 4.
In particular, in the present embodiment, the seal member 42 is a U-shaped movable member 43 serving as the processing tank 4, and has a U-shape when viewed from above and an L-shape when viewed from the side. Four
2 is provided, the overall sealing property is obtained, and since there is no discontinuity point in the sealing member 42 itself, good sealing property is obtained. Further, when the substantially U-shaped movable member 43 in which the sealing member 42 serves as the processing tank 4 descends, the three upper surfaces of the bed 2 are released, and the work piece 19 is attached to or removed from the table surface plate 3. It is easy to set up etc.

Embodiment 5. Figure 6 is a diagrammatic view including a partial section of the discharge machining apparatus according to a reference embodiment of the present invention, FIG. 7 is a detailed view of the processing tank portion of the electric discharge machining apparatus according to a reference embodiment of the present invention. In the drawings, the reference form and the same reference numerals and symbols the ginseng
Since it shows the same or corresponding components as the components of the mode of consideration, redundant description will be omitted here and only the differences will be described. 6 and 7, the electric discharge machine body 1 is installed inside the machining fluid supply device 30. The processing tank 4 is composed of a movable frame formed of a substantially rectangular frame body, and more specifically, a square frame 4 forming a side frame body.
B and a bottom portion 4A disposed on the bottom surface thereof. Bed 2
On the table surface 3 side, the bottom portion 50A of the fixed member 50 having a bottomed cylindrical shape covers the end portion of the bed 2 on the upper end of the bed 2, and the two are integrated in that state. At this time, the bed 2 side on which the bottom portion 50A of the bottomed cylindrical fixing member 50 is covered preferably has the shape of the bed 2 having substantially the same diameter so that the space between the bottom portion 50A of the fixing member 50 and the tubular portion 50B becomes narrow. . That is, since it is desirable that rattling or deformation between the two is difficult, the plate thickness of the fixing member 50 is increased, or the fixing is restricted so as not to be deformed by the bed 2. Bottom 50A of fixing member 50
A table surface plate 3 is provided on the table. Around the fixing member 50, a rectangular box-shaped processing tank 4 having a circular opening formed in a substantially central portion of the bottom portion 4A as shown in FIG. 7 is arranged. In the circular opening of the bottom portion 4A of the processing tank 4, the processing liquid OL
A ring-shaped sealing member 51 made of an elastic material is joined to prevent leakage of the sealing member 51, and the sealing member 51 is fixed to the fixing member 5.
It is elastically contacted around the cylindrical portion 50B of 0 to secure the sealing property between them. Even when the processing tank 4 moves up and down, the sealing member 51 is always elastically contacted around the cylindrical portion 50B of the fixed member 50 to maintain the sealing property between the two, so that the processing tank 4 is not affected by the position of the processing tank 4. The working liquid OL can be stored therein.
Further, since the electric discharge machine body 1 is installed inside the machining fluid supply device 30, the machining fluid OL can be reliably collected. In the reference embodiment, the processing tank 4 including the rectangular frame 4B and the bottom portion 4A has a circular opening formed in the bottom portion 4A. However, when the present invention is carried out,
The processing tank 4 can also be formed in a cylindrical shape. In this case, since the two are opposed to each other on the surface, the seal member 51 may be arranged around the cylindrical portion 50B of the fixed member 50,
It may be arranged on the cylindrical inner surface of the processing tank 4.

[0031] Thus, in the electric discharge machining apparatus of the present reference embodiment, the processing at the time of electric discharge machining and electric discharge machine main body 1 having a mechanical structure for performing electric discharge machining on the workpiece 19, the electric discharge machine main body 1 having The machining liquid 4 is stored in the machining tank 4 that stores the liquid OL and can be moved up and down, and the machining tank 4 of the electric discharge machine body 1.
And a processing liquid supply device 33 that stores the processing liquid OL discharged from the processing tank 4 and is movable up and down.
Around the table surface plate 3 of the electric discharge machine body 1,
That is, the bottomed cylindrical fixing member 60 disposed in the lower portion, the cylindrical peripheral surface of the fixing member 50, that is, the opening of the bottom portion 4A that constitutes the movable frame that slides on the tubular portion 50B, and the fixing member 60. The seal member 51 is provided between the cylindrical portion 50B and the opening of the bottom portion 4A that constitutes the movable frame. Therefore, a ring-shaped seal member 51 made of an elastic material for preventing the leakage of the machining liquid OL is joined to the circular opening of the bottom portion 4A of the machining tank 4 to secure the sealing property between the two. Even if the tank 4 moves up and down, the seal member 51 is always fixed to the fixing member 5.
Since it is elastically contacted around the cylindrical portion 50B of 0 and maintains the sealing property between them, the machining liquid OL can be stored in the machining tank 4 regardless of the position of the machining tank 4, and the electric discharge machine body 1 Is installed inside the machining fluid supply device 30, it is possible to reliably collect the machining fluid OL. In addition, one annular seal member 51 is provided in the circular opening of the bottom portion 4A of the processing tank 4 to obtain the overall sealability, and the seal member 42 itself has no discontinuity, which is good. A good sealing property can be obtained. Further, since the square frame 4B of the movable frame of the processing tank 4 can have any shape, the shape of the workpiece 19 is not specified.

Sixth Embodiment FIG. 8 is a cross-sectional view of essential parts of a seal portion of an electric discharge machine according to a reference embodiment of the present invention. In the drawings, the same reference numerals and symbols as those of the reference mode indicate the same or corresponding components as those of the above-described embodiment, and therefore, redundant description will be omitted here. Only the differences will be described. In FIG. 8, the processing tank 4 is composed of a movable frame 64 having only a cylindrical frame body. On the table surface plate 3 side of the bed 2, the flange portion 60a, which is located at the upper end of the substantially cylindrical fixing member 60, is positioned at the upper end of the bed 2, and is fixed to the lower surface of the table surface plate 3 in that state. Flange portion 6 of member 60
0a is attached integrally. The plate thickness of the fixing member 60 is such that it is not easily deformed. An annular seal member stopper 60b is arranged below the flange portion 60a located at the upper end of the fixing member 60 at a predetermined interval.
The flange portion 60a of the fixing member 60 and the sealing member stopper 60
Between b, a sealing member 61 made of an annular resin such as Teflon or nylon having a low sliding resistance is mounted in order to prevent the leakage of the working fluid OL. The outer periphery of the seal member 61 is in contact with the inner surface of the cylindrical processing tank 4. Therefore, the seal member 61 that prevents the leakage of the machining liquid OL by contact with the inner surface of the processing tank 4 (64) is sandwiched between the outer peripheral surface of the fixed member 60 and the inner surface of the processing tank 4 to ensure the sealing property between the two. Secure. Even if the processing tank 4 moves up and down, the sealing member 61 is always positioned around the fixed member 60 and maintains the sealing property between the two, so that the processing liquid is stored in the processing tank 4 regardless of the position of the processing tank 4. OL can be stored. Further, as in the reference mode of FIG. 5, since the electric discharge machine body 1 is installed inside the machining fluid supply device 30, the machining fluid OL can be reliably collected. In particular, in the present embodiment, the seal member 61 is arranged around the fixed member 60, but when the present invention is carried out, it may be arranged on the inner surface of the processing tank 4 (64). As described above, the sealing member 61 made of resin such as Teflon or nylon having a low sliding resistance is slid on the inner surface of the processing tank 4 in order to prevent the leakage of the processing liquid OL. It is attached in the form of, and compared with the elastic synthetic rubber material that is usually used,
Since the sliding resistance is low, the working tank 4 can be smoothly moved up and down. Since the elasticity is weak, the ability to follow the state of the inner surface of the processing tank 4 is inferior, but it can be sufficiently compensated by the ability to collect the processing liquid OL.

[0033] Thus, in the electric discharge machining apparatus of the present reference embodiment, the processing at the time of electric discharge machining and electric discharge machine main body 1 having a mechanical structure for performing electric discharge machining on the workpiece 19, the electric discharge machine main body 1 having The machining liquid 4 is stored in the machining tank 4 that stores the liquid OL and can be moved up and down, and the machining tank 4 of the electric discharge machine body 1.
And a processing liquid supply device 33 that stores the processing liquid OL discharged from the processing tank 4 and is movable up and down.
Is a cylindrical fixed member 60 disposed around the table surface plate 3 of the electric discharge machine body 1, a movable frame 64 that slides on the cylindrical peripheral surface of the fixed member 60, and the movable member 60 and the movable member 64. A seal member 61 is provided between the frame 64 and the frame 64. Therefore, the sealing member 61 for preventing the leakage of the processing liquid OL is joined between the fixed member 60 and the processing tank 4 (movable frame 64) to ensure the sealing property between the two, so that the processing tank 4 is secured. Even if the ascends and descends, the sealing member 51 is always attached to the fixing member 6
Since it is in contact with the periphery of 0 and maintains the sealing property between the two, the machining liquid OL can be stored in the machining tank 4 regardless of the position of the machining tank 4, and like the other embodiments. Since the electric discharge machine body 1 is installed inside the machining fluid supply devices 30, 31, 33, the machining fluid OL can be reliably collected. Further, one annular seal member 61 is arranged between the fixed member 60 and the processing tank 4 (movable frame 64), thereby obtaining the overall sealability, and the seal member 61 itself has a discontinuity point. Because there is no, there is little secular change,
Good sealability can be obtained. The good sealability of the present embodiment does not mean that the machining fluid OL does not leak at all, and even if the machining fluid OL leaks, it does not hinder the electric discharge machining. It means that it is negligible if a supply means is provided. Since the upper portion of the processing tank 4 (movable frame 64) can have any shape, the shape of the workpiece 19 is not specified. The present in the reference embodiment, lower sealing member 61 is sliding resistance Teflon, is made of synthetic resin such as nylon, moreover, because they are arranged in succession in the seal portion, facilitates the lifting of the machining tank 4 In addition, good sealability can be obtained with little change over time.

By the way, in the above-mentioned reference embodiment, the die-sinking electric discharge machine was described as an example, but the present invention can be applied to other types of electric discharge machine such as a wire-cut electric discharge machine. it can. Further, in the above-described reference embodiment, the description has been made on the assumption that the bottom surface of the machining fluid supply device is a flat surface. However, when the present invention is implemented, the bottom surface of the machining fluid supply device is inclined. Then, the processing waste and sludge can be collected at the lowermost portion. Then, the flat surface of the bottom surface of the working fluid supply device in the above embodiment is provided with a shielding plate formed at a height of about 10 to 30 cm from the bottom surface that stops the flow within a predetermined range, so that the flow of the working fluid OL flows there. Is reduced, and processing debris and sludge can be collected within the range. In particular, when the shielding plate that stops the flow within this predetermined range is provided in the lower region of the processing tank 4, the sedimentation speed can be increased and the processing waste and sludge can be collected efficiently. Further, it is possible to arrange a collection box in the lower region of the processing tank 4 to reduce the flow of the processing liquid OL and collect the processing waste and sludge within the range.

[0035]

As described above, the electric discharge machining apparatus according to the first aspect of the invention has an electric discharge machine main body having a mechanical structure for performing electric discharge machining on a workpiece, and machining during the electric discharge machining included in the electric discharge machine main body. The electric discharge machining comprises: a machining tank for storing a liquid, which can be moved up and down, and a machining liquid supply device for supplying the machining liquid to the machining tank of the electric discharge machine body and storing the machining liquid discharged from the machining tank. The machine body is installed inside the machining fluid supply device. Therefore, a space between the bed of the electric discharge machine main body and the machining liquid supply device serves as a space for containing the machining liquid, so that a large plane area can be obtained due to the gap between the two, and an area can be secured around the main body of the electric discharge machine. The working fluid can be accommodated in a large volume without increasing the size of the entire apparatus. In addition, even if the sealing property of the processing tank cannot be sufficiently secured, the processing liquid does not leak to the outside,
It can be accommodated in the working fluid supply device. Since the main body of the electric discharge machine is installed inside the machining fluid supply device, leakage of machining fluid from the machining tank can be reliably collected, and pipes, collection boxes, etc. are not required and the structure is simplified. Further, the installation location of the processing liquid supply device is unnecessary, and the structure is simplified by eliminating the pipe, the recovery box and the like. Furthermore, since the machining fluid is not stored in the entire bed, maintenance of the machining fluid such as cleaning of machining dust and sludge is easy. Therefore, the space is saved, the structure is simple, the manufacturing cost is low, and the working fluid does not easily leak to the outside.

According to a second aspect of the present invention, there is provided an electric discharge machine main body having a mechanical structure for performing electric discharge machining on a workpiece, and an electric discharge machine main body vertically moving up and down for storing a machining liquid during the electric discharge machining. A free-flowing machining tank and a machining fluid supply device for supplying the machining fluid to the machining vessel of the electric discharge machine main body and storing the machining fluid discharged from the machining tank. The machining liquid is installed inside the supply device and also stores the machining liquid inside the structure of the bed that constitutes the main body of the electric discharge machine. Therefore, the inside of the structure of the bed serves as a storage space for the working liquid, and the space between the bed and the working liquid supply device serves as a storage space for the working liquid, so that a large storage volume can be obtained by both storage spaces.
The working fluid can be accommodated in a large volume without increasing the size of the entire apparatus. Also, since the electric discharge machine body is installed inside the machining fluid supply device, even if the sealing ability of the machining tank cannot be ensured and the leakage of machining fluid from the machining tank cannot be eliminated, external machining is performed. The liquid can be surely collected in the machining liquid supply device without leaking, and the structure is simplified by eliminating the need for pipes, collection boxes and the like. Also,
The installation location of the processing liquid supply device is unnecessary, and the structure is simplified by eliminating the pipes and collection box. Therefore, the space is saved, the structure is simple, the manufacturing cost is low, and the working fluid does not easily leak to the outside.

According to a third aspect of the present invention, there is provided an electric discharge machine, which has an electric discharge machine main body having a mechanical structure for performing electric discharge machining on a workpiece, and which moves up and down to store a machining liquid in the electric discharge machine body during the electric discharge machining. In a discharge machining apparatus comprising a free machining tank and a machining fluid supply device for supplying the machining fluid to the machining vessel of the electric discharge machine main body and storing the machining fluid discharged from the machining tank, the machining fluid supply device is provided. It is formed integrally with the structure of the bed constituting the main body of the electric discharge machine and further on the outer periphery of the main body of the electric discharge machine. Therefore, the machining liquid supply device formed between the bed main body of the electric discharge machine main body and the storage wall of the outer peripheral portion of the bed main body serves as a storage space for the machining liquid. As a result, the storage volume of the working fluid can be increased without increasing the size of the entire apparatus. Further, even when the sealing property of the processing tank cannot be sufficiently secured, the processing liquid can be stored in the processing liquid supply device without leaking to the outside.
Therefore, by giving the machining liquid storage / supply function to the outer periphery of the head structure, the leakage of the machining liquid from the machining tank can be reliably recovered, and the structure is simplified by eliminating the pipes and recovery boxes. . Further, the installation location of the processing liquid supply device is not necessary, the space of the entire device can be saved, and the device can be transported at once, so that the installation work can be simplified. Furthermore, since the machining fluid is not stored in the entire bed, maintenance of the machining fluid such as cleaning of machining dust and sludge is easy. Therefore, by the machining liquid supply device formed between the bed main body of the electric discharge machine main body and the storage wall of the outer peripheral portion of the bed main body, the storage space of the machining liquid can be effectively used, and it is space-saving, and The structure is simple, the manufacturing cost is low, and the working fluid does not easily leak to the outside.

[Brief description of drawings]

FIG. 1 is a configuration diagram including a partial cross section of an electric discharge machine according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram including a partial cross section of an electric discharge machine according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram including a partial cross section of an electric discharge machine according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram including a partial cross section of an electric discharge machine according to a reference embodiment of the present invention.

FIG. 5 is a detailed view of a machining tank portion of an electric discharge machine according to a reference embodiment of the present invention.

FIG. 6 is a configuration diagram including a partial cross section of an electric discharge machine according to a reference embodiment of the present invention.

FIG. 7 is a detailed view of a machining tank portion of an electric discharge machine according to a reference embodiment of the present invention.

FIG. 8 is a cross-sectional view of a main part of a seal portion of an electric discharge machine according to a reference embodiment of the present invention.

FIG. 9 is a side view including a partial cross section of a conventional ram type electric discharge machining apparatus capable of vertically moving a machining tank.

FIG. 10 is a cross-sectional view of essential parts showing a state when the seal portion of the machining tank of the conventional electric discharge machine shown in FIG. 9 is moved up and down.

11 is a cross-sectional view of essential parts showing a state at the time of electric discharge machining in a sealing portion of a machining tank of the conventional electric discharge machine shown in FIG. 9.

FIG. 12 is a top view of a sealing portion of a machining tank of the conventional electric discharge machine shown in FIG.

FIG. 13 is a side view including a partial cross section of an electric discharge machine having a function of storing a machining liquid in a bed and a column in another conventional example.

[Explanation of symbols]

1 EDM main body, 2 beds, 3 table surface plate,
4 processing tanks, 5 columns, 6 saddles, 30, 31 processing liquid supply device, 15 recovery boxes, 16, 42, 51, 61
Seal member, 41 fixed member, 43 movable member, 50
Fixing member, 4A bottom part, 4B square frame, 60 fixing member, OL working fluid

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B23H 7/00 B23H 7/36

Claims (3)

(57) [Claims] 1. An electric discharge machine main body having a mechanical structure for performing electric discharge machining on a workpiece, a machining tank which is provided in the main body of the electric discharge machine, and which stores a machining liquid during the electric discharge machining, and which can be moved up and down. In an electric discharge machine comprising a machining liquid supply device for supplying a machining liquid to a machining tank of an electric discharge machine main body and storing the machining liquid discharged from the machining tank, the electric discharge machine main body is the machining liquid supply device An electric discharge machine characterized by being installed inside. 2. The electric discharge machine body is installed inside the machining fluid supply device, and the machining fluid is also stored inside a structure of a bed that constitutes the electric discharge machine body. The electric discharge machine according to claim 1. 3. An electric discharge machine main body having a mechanical structure for performing electric discharge machining on a workpiece, a machining tank which is provided in the main body of the electric discharge machine and which stores a machining liquid during the electric discharge machining and which can be moved up and down. In an electric discharge machine comprising a machining liquid supply device for supplying a machining liquid to a machining tank of an electric discharge machine main body and storing the machining liquid discharged from the machining tank, the machining liquid supply device comprises: An electric discharge machine, characterized in that it is formed integrally with the structural body of the bed to be formed and on the outer periphery of the main body of the electric discharge machine.