JPH1177439A - Electric discharge machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce damage and to reduce the number of exchanging times by providing a feeder circuit constituted of a connection terminal made of a conductor provided with a connecting terminal, a conductor connecting the connecting terminal of the conductor to a work table, and a flexible flat cable connecting the connecting terminal to an electrode guide unit. SOLUTION: Wiring around a lower side electrode guide unit is inserted into a through hole provided on the center of the wall of a machining tank to be fitted. Both electrodes of a connecting terminal outside the maching tank of a connection terminal 101 are connected to the output terminal of an electric power source device. The electrodes of the connecting terminal inside the machining tank of the connection terminal 101 are connected to a work table loading a work through a connecting copper plate 107, and connected to a wire between electrodes 103 made of a flexible flat cable through a fixed plate 102 and a fixed plate 104 fitted to the lower side electrode guide unit 105. Hereby, injury of the wire between electrodes is reduced, and hence the number of exchanging times of the wire between electrodes can be reduced.

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, and more particularly to an electric discharge machine in which a power supply circuit for a pulse current for machining is improved.

[0002]

2. Description of the Related Art In a conventional electric discharge machine, wiring from an electric power supply device for electric discharge machining to an electrode in a machine body and a workpiece is provided, for example, with a connection terminal near an upper end edge of a side wall of a machining tank. From here, wires were routed to the inside, or cables were passed over the side walls and routed directly to the terminals inside. Alternatively, as disclosed in JP-A-5-044222, a system in which wiring is performed through the inside of the lower arm has been proposed.

Further, as a gap line main body in a conventional electric discharge machine, for example, as disclosed in Japanese Patent Application Laid-Open Nos. 61-219518 and 60-62415, coaxial (concentric). A cable or a cable composed of an aggregate thereof is used, and a self-inductance is reduced by allowing a bidirectional current to flow in parallel. Alternatively, as described in Japanese Patent Application Laid-Open No. 55-125938, a proposal has been made to use a wire rod up to a processing tank as a feeder wire. However, a single wire portion that cannot be wired with such a coaxial cable or feeder wire (a pair is not formed near a workpiece or an electrode guide unit).
Therefore, in order to reduce the inductance even in the single wire portion, the registered utility model No. 252 registered by the present applicant is used.
No. 1208 has also been proposed.

As a method of arranging a gap line in a machining tank in a conventional electric discharge machine, a method for arranging a gap between terminals while providing a certain margin so that an electrode and a workpiece can relatively move is provided. Means have been used to make the wire as short as possible and hang it naturally on the way, crawl on a table, or hang it in some way. In the present specification, the term "inter-electrode line" refers to each wiring for supplying a processing pulse current to an electrode and a workpiece in a processing machine main body, and an "output line" or " The “power supply line” refers to a wire connecting the discharge power supply device to a terminal of the processing machine body. In addition, the “electrode guide unit” refers to a unit attached to the tip of the upper and lower arms so that the wire electrode is stretched linearly at the processing position, and the structure is a wire electrode that guides the wire electrode. It comprises a guide, a power supply (power supply piece) for supplying a pulse current for processing to a traveling wire electrode, and a jet nozzle for jetting a processing liquid into a processing gap.

[0005]

Generally, in a place where the gap line is immersed in the working fluid, electrical corrosion (electrolysis) of the gap line is unavoidable, and the gap between the galvanized gap line is unavoidable. Replacement is required. In addition, replacement of the gap line is necessary not only in the case of such corrosion but also in the case of damage. That is, since the electrode and the workpiece are relatively moved, the wiring in the processing tank easily interferes with the processing head, the workpiece, and the workpiece mounting fixture, and it is necessary to replace a wire that is hooked and damaged by these. .
Even if the pole line is suspended or crawled, a freely movable part for relative movement is always necessary, and this part is easily caught by other parts and easily damaged. In particular, when a power supply line is wired from the upper part of the processing tank, the wiring is likely to hinder relative movement. In this way, it is necessary to replace the damaged or damaged electrode line, but at this time, if the power supply line extends directly over the side wall of the processing tank and is directly wired inside, the part that has been immersed in the processing liquid and Not only must the entire line be replaced. In addition, it is possible to reduce the length of the line by lifting or crawling the gap line in the processing tank, but when lifting it, a lifting device is required, and the processing tank is However, there are restrictions on loading and unloading of the workpiece. In addition, if the gap line is naturally hung down or crawls on a table, the possibility of interference with the workpiece or its mounting jig increases, and the interference causes the gap line to move. In addition to not only affecting the accuracy of the machine and the accuracy of the machining but also causing a failure of the device. Therefore, a sufficient interference check was required before starting operation.

[0006] JP-A-5-044222 discloses that
As described above, it is disclosed that wiring is performed through the inside of the lower arm. However, the structure is complicated, waterproof measures are required, and it is difficult to replace a line that has been eroded. FIG. 4 of the above-mentioned registered utility model No. 2521208 discloses a flat electric wire, but does not disclose any wiring routing.

The present invention has been made to solve these problems, and an object of the present invention is to provide an electric discharge machine capable of solving the following problems. (1) The distance between the poles should be small and the number of replacements can be reduced. (2) The minimum length is required even when exchanging the pole line, and the exchange work must be easy. (3) Easy loading and unloading of the workpiece into the processing tank,
In addition, the time and labor for checking interference between the gap line and the workpiece or its mounting jig can be reduced. (4) Self-inductance during transmission of machining pulse current should be small.

[0008]

An object of the present invention is to provide a connection terminal comprising a pair of conductors provided through a wall surface of a machining tank of an electric discharge machine and having connection terminals at both inner and outer ends of the tank. A conductor that electrically connects the connection terminal inside the tank of the conductor to the worktable and a connection terminal inside the tank of the other conductor are electrically connected to the electrode guide unit that is relatively movable with respect to the processing tank. This can be achieved by an electric discharge machine characterized by including a power supply circuit including a flexible flat cable.

The connection terminal may be provided so as to penetrate the side wall of the processing tank or may be provided so as to penetrate the bottom wall.

[0010] The configuration of the connection terminal itself is desirably such that a hollow columnar outer conductor and a columnar inner conductor are coaxially provided via an insulating member.

When the electric discharge machine is a wire-cut electric discharge machine, an electrode guide unit provided on a lower arm which is inserted into a machining tank so as to be able to advance and retreat and traverse is used as the movable electrode guide unit. In such a case, it is recommended that the flexible flat cable connecting the inner connection terminal of the connection terminal and the lower electrode guide unit be attached so that the width direction is vertical.

When the electric discharge machine is a wire cut electric discharge machine and the electrode guide unit provided on the upper arm is configured to move in a plurality of axial directions with respect to the machining tank, the upper electrode guide is provided. It is recommended that a flexible flat cable be used as a power supply circuit for the units, and that the cable be mounted so that the width direction crosses the moving units in each axial direction so that the width direction is substantially perpendicular to the moving direction of each moving unit. . That is, for example, the wire-cut electric discharge machine sequentially stacks moving units in the X, Y, U, and V-axis directions, and has a Z-axis moving unit at the tip thereof.
In the case of a wire-cut electric discharge machine in which an axial moving unit is provided with an upper electrode guide unit (hereinafter referred to as a "wire-cut electric discharge machine having a five-axis moving unit stacked structure"), a power supply circuit to the upper electrode guide unit. Is arranged in a vertical direction in the width direction of a gap line composed of a flexible flat cable, and is wired from the terminal block on the fixed side to the UV axis direction moving unit. It is recommended that the circuit be wired from the axial movement unit to the upper electrode guide unit. Further, the wire-cut electric discharge machine is a wire-cut electric discharge machine in which a Z-axis direction moving unit is provided at the tip of a moving unit in the U- and V-axis directions, and the Z-axis direction moving unit is provided with an upper electrode guide unit. In some cases, the power supply circuit to the upper electrode guide unit is configured such that a gap line made of a flexible flat cable is oriented in the vertical direction in the width direction and wired from the terminal block on the fixed side to the UV axis direction moving unit, Further, it is recommended that the circuit be horizontally connected to the UV axis direction moving unit and be connected to the upper electrode guide unit. Furthermore, the above wire cut electric discharge machine,
In the case of a wire-cut electric discharge machine in which a UV direction moving unit is provided on the Z axis direction moving unit and the UV direction moving unit is provided with an upper electrode guide unit, the power supply circuit to the upper electrode guide unit is flexible. The gap line composed of a flat cable is oriented in the horizontal direction in the width direction, and wired from the terminal block on the fixed side to the Z-axis direction moving unit,
Further, it is recommended that a circuit be provided in which the width direction is vertical and the Z-axis direction moving unit is connected to the upper electrode guide unit.

The configuration, operation and effect of the present invention having the above-described features will be described more specifically. In the present invention, in particular, in the wiring around the lower arm, the wiring from outside to inside the processing tank is relayed by the connection terminal. This is particularly effective in the case where the stand of the work stand of the wire cut electric discharge machine and the side wall of the machining tank have an integral structure in which they are not mutually displaced. Also,
In the present invention, a flat cable is used as a gap line main body for wiring to the electrode guide unit in the processing tank, and the form of routing the gap line in the processing tank is also improved.

That is, for the wiring of the power supply line for supplying the processing pulse current from the outside to the inside of the processing tank, a connection terminal penetrating the side wall or the bottom wall of the processing tank is provided. This connection terminal has terminal blocks at both ends so that external wiring (output line) can be connected to its outer terminal and internal wiring (inter-electrode line) can be connected to its inner terminal. Two conductors are coaxially arranged. To reduce the inductance. Thereby, the rising waveform of the processing pulse current does not collapse, and a reduction in processing performance can be prevented. As a countermeasure against electrolytic corrosion and damage of the gap line, only the short gap line inside the processing tank needs to be replaced. It is desirable that the connection terminal be detachable and replaceable in case the terminal inside the connection terminal is eroded.

Next, in the present invention, by using a flat cable as shown in FIG. 6, for example, as a gap line main body, it is possible to prevent the inductance from increasing even if the gap line is slightly longer, and to make the rising of the pulse longer. Do not blunt. An example of the specification of such a flat cable is shown below. Conductor (core wire) ──AWG28 (about 0.4 mmφ) × 50 cores × 2 sheets Pitch between wires 枚 1.27 mm Insulation こ れ PTFE This is the registered utility model 2521 as described later.
It is an electric wire which satisfies the requirements as an electric wire for an electric discharge machine according to No. 208. By using such a flat cable as the interpole wire main body, it is possible to reduce the inductance and the impedance of the high-frequency current due to the increase in the surface area of the conductor, and the processing speed becomes equal at the actual machine level.

According to the present invention, the arrangement of the gap line in the processing tank is such that the flat flat cable hardly bends in the width direction.
This is performed using the fact that it is easily bent in a direction (longitudinal direction) perpendicular to the width. That is, when the inside connection terminal of the connection terminal and the electrode guide unit provided on the lower arm are connected by the flexible flat cable in the processing tank of the wire cut electric discharge machine, the width direction of the flat cable is changed. Attach it vertically. Further, in the wire electric discharge machine, since the upper electrode guide unit moves in a three-dimensional direction with respect to the column or the machining tank,
A portion for slackening the flat cable in the horizontal direction and a portion for slackening in the vertical direction are provided so that the movement in the horizontal direction and the movement in the vertical direction are shared. As a result, even if the electric wire is not lifted, it does not drop unnecessarily and does not protrude to an arbitrary place.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing one embodiment of a wire-cut electric discharge machine having a 5-axis moving unit stacking structure according to the present invention, and FIG. 2 is a lower electrode guide unit of the wire-cut electric discharge machine shown in FIG. FIG. 3 is a perspective view showing a wiring state of the surrounding gap line, FIG. 3 is a perspective view showing a wiring state of the gap line around the upper electrode guide unit of the wire-cut electric discharge machine shown in FIG. 1, and FIG. FIG. 5 is a perspective view showing one embodiment of a wire-cut electric discharge machine according to the present invention in which a Z-axis direction moving unit is mounted at the tip of a U- and V-axis direction moving unit for cutting, and FIG. FIG. 6 is a perspective view showing one embodiment of a wire-cut electric discharge machine according to the present invention having a U- and V-axis moving unit for taper cutting at a tip, and FIG. 6 is a flexible flat preferably used in the present invention. One of the cables Is a perspective view showing a.

First, an embodiment in which the present invention is applied to a wire-cut electric discharge machine having a five-axis moving unit stacking structure shown in FIG. 1 will be described. In FIG. 1, 11 is a bed,
12 is an X-axis moving unit, 13 is a Y-axis moving unit, 14 is a U-axis moving unit, 15 is a V-axis moving unit, 16 is a Z-axis moving unit, 17 is an upper arm, and 18 is a work stand. It is a processing tank that also served.
Further, 100 is a work table, 101 is a connection terminal, 102 is a gap fixing plate, 103 is a gap line by a flexible flat cable, 104 is a gap fixing plate, 105 is a lower electrode guide unit, and 106 is a lower electrode guide unit. Lower arm, 107
Is a transition copper plate, 110 is a terminal block, 111 is a transition copper plate, 11
Reference numerals 2-1 to 112-2 and 112-3 denote inter-electrode lines formed by a flexible flat cable; 115, a fixing plate; and 116, an upper electrode guide unit.

The lower electrode guide unit 105 includes a lower arm 106 attached to the Y-axis direction moving unit 13.
Since the X-axis direction moving unit 12 and the Y-axis direction moving unit 13 are driven, they are moved in the XY axis direction in the processing tank 18. The upper electrode guide unit 116 is attached to the distal end of the upper arm 17 via the U-axis direction movement unit 14, the V-axis direction movement unit 15, and the Z-axis direction movement unit 16 in addition to the X and Y-axis movements. XYUVZ
It moves in five axis directions. Here, the U axis is in the same direction as the X axis, and the V axis is in the same direction as the Y axis. The UV (XY) axis coordinates of the upper electrode guide unit 116 are displaced from the XY axis coordinates of the lower electrode guide unit 105. Thereby, the taper cut can be performed by making the wire electrode oblique.

In the present invention, the electric wire for supplying the pulse current for processing is an output line (feed line) outside the processing tank.
As for (2), a conventional electric wire, preferably a coaxial cable is used, but a flexible flat cable is used as a line between the movable parts in the processing tank. An example of such a flexible flat cable is shown in FIG.
The flexible flat cable 500 is composed of a plurality of core wires 501 and 501 aligned in parallel with each other, and a covering insulator 502 made of a resin such as PTFE that couples them in a state where they are insulated from each other. It has characteristics that it is easy to bend in the direction and hard to bend in the width direction.

The flexible flat cable desirably has the characteristics of the electric wire for electric discharge machine described in the registered utility model No. 2521208. That is, when the diameter of the core wire 501 is D and the interval (pitch) between the adjacent core wires is L, it is desirable that the configuration is such that L> D × 1.5. In particular, in the wiring routing of the present invention, the distance between the poles may be longer than before, and therefore, it is necessary to use a wire having as small an inductance as possible. In particular, since the wiring to the upper electrode guide unit is longer than before, it is effective to use a flat cable having the above configuration. From this point of view, in the flat cable having the above specification, since the core wire diameter D is 0.4 mm and the line pitch is 1.27 mm, the distance L between core lines is (1.27−
0.4) = 0.87> 0.4 × 1.5, and the above L> D × 1.5
It satisfies the requirements of

Next, the wiring of the above-mentioned gap line in the processing tank will be described. First, the wiring around the lower electrode guide unit will be described with reference to FIGS. 1 and 2. The connection terminal 101 is inserted and attached to a through hole provided in the center of the front wall surface of the processing tank (fixed side) 118. .
The connection terminal 101 preferably has two electric conductors coaxially arranged in a columnar or cylindrical shape. In the illustrated embodiment, a hollow columnar outer conductor 101a and a columnar inner conductor 101b are coaxially provided via an insulating member 101c. The opposite pulse flows 2
This is because the inductance of the two conductors can be reduced when the insulation distance is minimized. Sealing to the through hole in the wall of the processing tank only requires sealing with an O-ring, and the structure is simple. In this embodiment, the through-hole for mounting the connection terminal 101 is provided at the center of the front surface of the processing tank 118. However, the arrangement relationship between the power supply device and the machine and the structure of the processing tank, for example, the structure in which the processing tank moves up and down, the processing tank In consideration of the structure in which the side wall of the machine opens and closes in the front and left and right directions of the machine, it is desirable that the through hole be provided in a portion where the processing tank as close to the power supply as possible does not move. By providing the wiring at the bottom or the like, the sagging state of the wiring in the processing tank can be reduced.

Both poles of the connection terminal outside the processing tank of the connection terminal 101 are respectively connected to output terminals of a power supply device not shown in the figure. On the other hand, one pole of the connection terminal in the processing tank of the connection terminal 101 (the end of the external conductor 101a in the processing tank) is connected to a work table 100 on which a work is placed.
(Fixed side), connected by a crossover copper plate 107, and the other pole (the end of the inner conductor 101b in the processing tank) is lowered by a gap line 103 made of a flexible flat cable via the fixed plate 102. It is connected to the fixed plate 104 (moving side) attached to the side electrode guide unit 105. The fixed plate 104 and the current-carrying piece in the lower electrode guide unit 105 (to supply power by contacting the wire electrode) are electrically connected in the guide unit. Thus, a pulse current for electric discharge machining is supplied between the work and the wire electrode, and electric discharge machining is performed. The rotation stopping protrusion 102 a provided on the fixing plate 102 is connected to the inner conductor 101 of the connection terminal 101.
When the fixing plate 102 is screwed to the end in the processing tank b, the fixing plate 102 is rotated with respect to the connection terminal to prevent the flat cable 103 from tilting in the vertical direction. A notch is formed on the outer periphery of the end of the inner conductor 101b in the processing tank, and the fixing plate 102 is screwed so that the notch comes into contact with the upper surface of the rotation stopping protrusion 102a. The rotation of the fixing plate 102 can be prevented.

During processing, the lower electrode guide unit 105 moves in the XY plane, so that the gap line 103 formed of a flexible flat cable is arranged so that its flat width direction is parallel to the vertical direction. And bend in the XY plane along the longitudinal direction. The length of the inter-electrode line is set to such an extent that the lower electrode guide unit 105 can be slightly bent when the lower electrode guide unit 105 is maximally separated from the fixing plate 102. The flexible flat cable in the wiring around the upper electrode guide unit, which will be described later, is also appropriately bent similarly. In this way, the vertical sag is reduced, and the movement in the XY plane is made smooth, so that the slack is not allowed at an arbitrary position. The cover 107 attached to the lower arm 106 is for preventing the flexible flat cable 103 from protruding deeper than the cover 107.

Next, the wiring around the upper electrode guide unit will be described with reference to FIG. Terminal block 11
0 (fixed side) is provided at the center of the side wall forming the back surface of the processing tank. Power is supplied to the terminals of the two poles of the terminal block 110, one of the poles is connected to the work table 100 (fixed side) on which the work is placed by a copper plate 111, and the other pole is a flexible flat cable 112. Is connected to the fixed plate 116a attached to the upper electrode guide unit 116 (moving side). The fixed plate 116a and the conductive pieces provided in the upper electrode guide unit 116 are electrically connected inside the upper electrode guide unit, and between the workpiece and the wire electrode as in the case of the lower electrode guide unit. Is supplied with a processing pulse current.

As shown in detail in FIG. 3, the flexible flat cable 112 laid between the terminal block 110 and the upper electrode guide unit 116 has an upward portion 112-1 → a left and right portion 112-. Each time the direction is changed by 90 degrees from the 2 → vertical portion 112-3, it is folded along a line that forms 45 degrees with respect to the center line. Since it is important that the portion of the left-right direction portion 112-2 be as lightweight and flexible as possible, it is desirable to use two flexible flat cables in an overlapping manner. That is, the upward portion 1
At the portion 12-1, the two flat cables are lifted straight up, and once fixed by the fixing bracket 114 above the side wall on the back of the processing tank. At this position, one is to the left and the other is
The part of the sheet that has turned to the right is the left-right part 11
2-2. The left-right portion 112-2 makes a U-turn from both sides, and is gathered and fixed from the left and right to a fixed plate 115 (moving side) attached near the lower end of the V-axis direction moving unit 15. Here I can change the direction in the vertical direction 2
The vertical portion 112-3 is overlapped, and the tip is finally fixed to the fixing bracket 116a (moving side) of the upper electrode guide unit 116.

The upper electrode guide unit 116 moves in the XY-axis direction and the Z-axis direction with respect to the fixed side.
The left-right portion 112-2 of the flexible flat cable 112 is arranged so that its flat width direction is parallel to the vertical direction so as to allow movement in the axial direction. Are appropriately bent in a horizontal plane. For movement in the Z-axis direction, the vertical portion 112-
In 3, the flat width direction is arranged so as to be parallel to the horizontal direction, and bending is appropriately provided in the Z-axis direction.

Next, the embodiment of FIG. 4 will be described. In this embodiment, a Z-axis direction moving unit 320 is provided at the tip of U- and V-axis direction moving units 318 and 319 mounted on a column 317.
20 is a wire-cut electric discharge machine provided with an upper electrode guide unit 316. The movement in the XY axis direction may be performed by moving the column 317 or the processing tank 18. In this case, the power supply circuit around the upper electrode guide unit pulls up the flexible flat cable from the fixed terminal block 310 to the fixing bracket 314 as an upward portion 312-1 and then orients the width direction of the cable in the vertical direction as indicated by 312-2. Then, wiring is performed from the fixing bracket 314 to the fixing plate 315 of the UV axis direction moving unit, and further, the width direction is horizontally set as indicated by 312-3, and the upper electrode guide unit is fixed from the fixing plate 315 of the UV axis direction moving unit. Wired to plate 316a.

Next, the embodiment of FIG. 5 will be described. In this embodiment, a Z-axis moving unit 418 that moves in the Z-axis direction with respect to the column 417 is provided, and UV-direction moving units 419 and 420 are suspended from the unit. Guide unit 416
This is a wire-cut electric discharge machine provided with. The movement in the XY axis direction may be performed by moving the column 417 or the processing tank. In this case, the power supply circuit around the upper electrode guide unit is configured such that the gap line made of a flexible flat cable is oriented in the horizontal direction in the width direction as indicated by 412-1 from the fixed-side terminal block 410 in the Z-axis direction. The wiring is fixed to the fixed plate 415 of the moving unit, and then the fixed plate 4 of the moving unit in the Z-axis direction is moved to the vertical direction as indicated by 412-2.
15 is wired to the fixing plate 416a of the upper electrode guide unit.

Although a wire-cut electric discharge machine has been described as an example, the present invention can be similarly applied to an electric discharge machine which performs engraving using a full-form electrode. Further, in the embodiment of the present invention, a configuration in which a flexible flat cable is used as a line between the upper electrode guide unit and the lower electrode guide unit has been described as an example. A configuration in which a flexible flat cable is used only for the interline may be used.

[0031]

The present invention is configured as described above,
The following operational effects can be obtained. (1) As a gap line, wiring is performed using a flat flexible flat cable that is difficult to bend in the width direction and easy to bend in the longitudinal direction, so the wires may unnecessarily hang down without lifting the gap line. Since it does not protrude into a selfish place and does not interfere with a workpiece or its mounting tool, the gap between the poles is less likely to be damaged, and the number of times of replacement of the gap between wires can be reduced. (2) Even when the gap line is replaced due to electrolytic corrosion or damage, only the gap line in the processing tank needs to be replaced, and it is not necessary to replace even the output line. The replacement work is also easy. Further, even when the inner terminal of the connection terminal is electrolytically eroded, the connection terminal can be removed, so that the replacement operation is easy. (3) The connection terminal is provided by penetrating the processing tank without mounting the connection terminal near the upper end of the side wall of the processing tank, so that the processing tank can be opened and does not hinder the loading and unloading of workpieces. In addition, since the gap line does not interfere with the workpiece and its mounting jig, the time and labor for interference check can be reduced. (4) A flat cable is used as the inter-electrode line, and a connection terminal is composed of two conductors arranged coaxially. Therefore, the self-inductance at the time of transmitting the processing pulse current is small. The rising waveform of the current is not disturbed, and a reduction in processing performance can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a wire-cut electric discharge machine having a 5-axis moving unit stacking structure according to the present invention.

FIG. 2 is a perspective view showing a wiring state of a gap line around a lower electrode guide unit of the wire electric discharge machine shown in FIG.

FIG. 3 is a perspective view showing a wiring state of a gap line around an upper electrode guide unit of the wire electric discharge machine shown in FIG. 1;

FIG. 4 is a perspective view showing one embodiment of a wire-cut electric discharge machine according to the present invention in which a Z-axis direction moving unit is mounted at the tip of a U- and V-axis direction moving unit for taper cutting.

FIG. 5 is a perspective view showing one embodiment of a wire-cut electric discharge machine according to the present invention in which U and V-axis direction moving units are mounted at the tip of the Z-axis direction moving unit for taper cutting.

FIG. 6 is a perspective view showing an example of a flexible flat cable that can be suitably used in the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 work table 101 connection terminal 101a outer conductor 101b inner conductor 102 fixing plate 103 interelectrode line (flexible flat cable) 104 fixing plate 105 lower electrode guide unit 106 lower arm 107 transition copper plate 110 terminal block 111 transition copper plate 112 pole Interline (flexible flat cable) 116 Upper electrode guide unit

Claims (10)

[Claims] 1. A connection terminal (101) comprising a pair of conductors provided through a wall surface of a machining tank (18) of an electric discharge machine and having connection terminals provided at both inner and outer ends of the tank. A conductor (107) for electrically connecting the connection terminal inside the tank to the work table (100), and an electrode guide unit (105) for moving the connection terminal inside the tank of the other conductor relatively to the processing tank. And a flexible flat cable (103) electrically connected to the electric discharge machine. 2. The electric discharge machine according to claim 1, wherein the connection terminal is provided through a side wall of the machining tank. 3. The electric discharge machine according to claim 1, wherein the connection terminal is provided through the bottom wall of the machining tank. 4. The connection terminal according to claim 1, wherein the connection terminal is a component formed by coaxially providing a hollow columnar outer conductor (101a) and a columnar inner conductor (101b) via an insulating member (101c). The electric discharge machine according to any one of the above. 5. An electro-discharge machine according to claim 1, wherein said electro-discharge machine is a wire-cut electro-discharge machine, and said movable electrode guide unit is provided on a lower arm (106) which is inserted into a machining tank so as to advance and retreat and move laterally. The method according to any one of claims 1 to 4, wherein
The electric discharge machine according to any one of the above. 6. A flexible flat cable (103) for connecting an inner connection terminal of a connection terminal and an electrode guide unit provided on a lower arm in a processing tank so that a width direction thereof is vertical. The electric discharge machine according to claim 5. 7. An electric discharge machine is a wire cut electric discharge machine, and a power supply circuit for supplying electric power to an electrode guide unit provided on an upper arm configured to move in a plurality of axial directions with respect to a machining tank is provided. Consisting of a flexible flat cable,
The electric discharge machine according to claim 5, wherein the electric discharge machine is attached so that the width direction is substantially orthogonal to the moving direction of each moving unit, and is sequentially bridged between moving units in each axial direction. 8. Moving units (12, 13, 14, 15) in the X, Y, U, and V-axis directions are sequentially stacked, and a Z-axis moving unit (16) is provided at the tip thereof to move in the Z-axis direction. A power supply circuit to the upper electrode guide unit of the wire-cut electric discharge machine in which the upper electrode guide unit (116) is provided in the unit, fixes the gap line made of a flexible flat cable with its width direction oriented in the vertical direction. (112-2) from the terminal block on the side to the UV-axis direction moving unit, and further, to make the width direction horizontal, and from the UV-axis direction moving unit to the upper electrode guide unit (112-2).
8. The electric discharge machine according to claim 7, wherein the electric discharge machine is a circuit that performs 3). 9. A moving unit (318, 318) for moving in the U and V axis directions.
319) is provided with a Z-axis direction moving unit (320) at the tip thereof, and the Z-axis direction moving unit is provided with an upper electrode guide unit (316). A pole line composed of a flexible flat cable is oriented in the vertical direction in the width direction, and wired from the terminal block on the fixed side to the UV axis direction moving unit (3).
The electric discharge machine according to claim 7, wherein the electric discharge machine is a circuit in which the width direction is horizontally set and wiring is performed from the UV axis direction moving unit to the upper electrode guide unit (312-3) (12-2). 10. A U-shaped unit is mounted on a Z-axis direction moving unit (418).
A V-direction moving unit (419, 420);
The upper electrode guide unit (41
The power supply circuit to the upper electrode guide unit of the wire-cut electric discharge machine provided with 6) is arranged such that the gap line composed of a flexible flat cable is oriented in the horizontal direction in the width direction and the Z-axis from the fixed terminal block. Wiring to direction moving unit (412-1)
Then, the width direction is made vertical and the wiring (41) is connected from the Z-axis direction moving unit to the upper electrode guide unit.
The electric discharge machine according to claim 7, wherein the electric discharge machine is a circuit formed by 2-2).