JPH11114725A - Work locking method of wire-cut electric discharge machine and jig used therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work locking method of a wire-cut electric discharge machine and a jig to be used therein, capable of holding a work, whose both sides are parallel plates, in a state that it is paralleled with a table surface and a backside of the work and the tip of a nozzle at the lower side becomes the same height position, and further, the lower nozzle or the like will not collide with the jig at all. SOLUTION: In a work locking method of this wire-cut electric discharge machine, each work locking jig 21 is attached to at least two spots on a table 1 in a state that the tip part rushes into a work machining area, and a horizontal mounting surface 27 being provided on each tip part backside of these respective jigs 21 in the upper part of a portion for thickness of the work W or a plate whose both sides are paralleled, and then each tip part of these jigs 21 and the work W are connected to each other via a clamp 7 to be set up in the upper part than the back of the work W, whereby a surface of this work W is stuck fast to the mounting surface 27 of the jig 21, and thus the work W is held up in a state that the back of the work W is paralleled with the table surface and it becomes the same height position as the tip end of the nozzle 3 at the lower side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire-cut electric discharge machine having a horizontal table surrounding a work processing area and having a pair of nozzles vertically opposed to a table surface. And a jig used for the method.

[0002]

2. Description of the Related Art A wire-cut electric discharge machine has a horizontal table, a pair of nozzles vertically opposed to a table surface, and a tip of a lower nozzle is provided at a height of the table surface. And a structure lowered by several mm from the height of the table surface. 2. Description of the Related Art Conventionally, when a work having a plate body whose front and rear surfaces are parallel to each other is fixed to a wire electric discharge machine of this type, a method of clamping a portion of the work that is not processed by a jig attached to a table has been used. In order to clamp workpieces of various thicknesses, the jig generally has a structure in which a screwing amount of a bolt screwed into the jig can be adjusted.

An example of a conventional fixing method will be described in detail with reference to FIG. 13. When a rectangular work 92 is fixed to an L-shaped table 91, the work is placed on one side of the table. One end is placed, a part of the placement part is clamped by the first jig 93 attached to the table, and the other end (corner in the drawing) of the work is attached to the other side of the table. There is a method of holding the work so that the tip of the lower nozzle is in contact with the back surface of the work. Also,
As shown in FIG. 14, this second jig had a structure in which a work was held between a bolt screwed into an upper jaw 95 and a lower jaw 96.

[0004]

However, the conventional method is not limited to the above-described example, and is a method of clamping a work by tightening a bolt. Therefore, there is a problem that the degree of horizontality of the work slightly changes depending on the degree of bolt tightening. Therefore, it has been difficult to hold the work parallel to the table surface using such a jig. For this reason, for example, even if you intend to machine a through hole perpendicular to the workpiece,
The through-hole may be slightly tilted, which is an obstacle to performing high-precision processing.

By the way, a wire cut electric discharge machine is shown in FIG.
As shown in FIG. 4, the tip of the lower nozzle 97 has the same structure as the height of the table surface or is slightly lowered (not shown), and the lower jaw of the second jig is connected to the table surface. In combination with the structure supporting the work from below, for example, when the table or the lower nozzle is moved, the lower nozzle or the nozzle holding member 98 and the like are attached to the lower jaw. In this case, it was necessary to stop the processing operation and re-attach the jig to another location.
In addition, the same problem occurs when processing a portion near the second jig.

Therefore, there is a method of using a third jig 99 fixed above the table surface to prevent the lower nozzle and the like from hitting the jig as shown in FIG.
In the case of this method, a considerable gap G is formed between the back surface of the work and the tip of the lower nozzle.
There is a disadvantage that the processing speed of the work and the success rate of the automatic connection of the wire are reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to move a work, which is a plate body whose front and back surfaces are parallel to each other, in parallel to a table surface and a lower surface of the work. By providing a workpiece fixing method of a wire cut electric discharge machine and a jig used for the same, the tip of the side nozzle can be held at the same height position, and the lower nozzle and the like do not hit the jig. is there.

[0008]

According to the present invention, there is provided a method for fixing a work of a wire-cut electric discharge machine, which comprises a horizontal table surrounding a work processing area, and having a pair of nozzles vertically opposed to a table surface. In the electric discharge machine, work fixing jigs are attached to at least two places on the table with their tips protruding into the work processing area, and each jig is attached to the tip of the lower nozzle serving as a reference. A horizontal mounting surface provided on the back surface of the front part is provided above each of the thickness of the work whose front and back surfaces are parallel plate bodies, and the front end of each jig and the work are placed above the back surface of the work. The surface of the work is brought into close contact with the mounting surface of the jig, and the back surface of the work is placed parallel to the table surface and at the same height as the tip of the lower nozzle. Characterized that you have lifting. The connection with the stopper here includes a connection by an adhesive, a vacuum and a magnet, but a connection by a screw action is desirable.
For the connection by the screw action, there is a method in which a bolt hole provided in the work and a removal hole provided in the front end of the jig are aligned with each other, and a bolt serving as a stopper is tightened. Conversely, there is a method in which a hole provided in a work is aligned with a bolt hole provided in a tip portion of a jig, and a bolt serving as a stopper is tightened.
In addition, when the work is provided with a hole and the jig is provided with a hole at the tip, the stopper is composed of a support block with a bolt hole and a bolt, and the support block escapes above the work in the hole of the work. There is a method in which the bolts are tightened by fitting the holes of the jig and the bolt holes of the support block so that they cannot be fitted. When the work is provided with a hole and the jig is provided with a bolt hole at the tip, the stopper is made up of a support block with a hole and a bolt, and the support block escapes above the work in the hole of the work. There is a method in which the bolt is screwed in such a way that the bolt hole of the jig and the hole of the support block are aligned with each other.

The wire-cut electric discharge machine has a structure in which the tip of the lower nozzle and the table surface are provided at the same height, and a structure in which the tip of the lower nozzle is provided slightly lower than the table surface. Therefore, a work having a thickness corresponding to the distance between the mounting surface of the jig fixed to the table and the tip of the lower nozzle is used.

If a variety of jigs are prepared in advance and have different heights at which the joining surface to be placed on the table and the mounting surface are separated, the jig can be selected according to the thickness of the work. With this, the back side of the work fixed to the mounting surface of the jig is
It can be set to be in contact with the tip of the lower nozzle.

Further, the workpiece can be processed by one kind of jig regardless of the thickness of the work. In a case where the distance between the mounting surface of the jig directly fixed to the table and the tip of the lower nozzle is wider than the thickness of the work, at least two positions on the table as in the invention according to claim 2 The jig for fixing the work is mounted with the tip part protruding into the work processing area, and the horizontal mounting surface provided on the back of the front part of each jig with respect to the tip of the lower nozzle serving as a reference, The upper and lower surfaces are parallel plates, and are provided above the work by adding the thickness of the work and the thickness of the spacer.A spacer is interposed between the mounting surface of each jig and the surface of the work. The part, the spacer, and the work are connected via a stopper arranged above the back surface of the work, so that the work is brought into close contact with the mounting surface side of the jig via the spacer, and the back surface of the work is placed on the table surface. The tip of the nozzle parallel to and below It may be holding the workpiece in a state where the same height position.

Further, when the distance between the mounting surface of the jig directly fixed to the table and the tip of the lower nozzle is smaller than the thickness of the work, the table may be arranged on the table. At least two places, a work fixing jig is placed with an intermediary member interposed, and each jig is placed on a table,
Attach it with its tip protruding into the work area.
A horizontal mounting surface provided on the back surface of the front part of each jig is provided above the front end of each jig with respect to the tip of the lower nozzle, which is the reference, by the thickness of the work which is a plate body with both front and back surfaces parallel. And the work are connected via a stopper arranged above the back surface of the work so that the work surface is in close contact with the mounting surface of the jig. What is necessary is just to hold | maintain a workpiece | work in the state which is the same height position as the front-end | tip of the nozzle of this.

[0013] The work fixing jig of the present invention is provided at least at one end of a mounting portion having a joining surface to be mounted on a table.
A connecting portion for suspending and supporting the work is protrudingly provided, and a mounting surface in close contact with the surface of the work is formed on the back side of the connecting portion above the joining surface and parallel to the joining surface, and a table is provided on the mounting portion. An attachment hole for fixing the work with a tightening bolt and a hole for hanging and fixing the work with a stopper are provided in the connecting portion so as to penetrate in a vertical direction. Further, a bolt hole may be provided instead of the hole.

[0014]

DETAILED DESCRIPTION OF THE INVENTION A wire-cut electric discharge machine used in the present invention has a substantially U-shaped horizontal table 1 and a work processing area 2 surrounded by the table 1 as shown in FIG.
And a pair of nozzles 3, 3 opposed in the vertical direction in the work processing area 2.

The table 1 has three pedestals 4 arranged in a U-shape. Then, all the pedestals 4 have their surfaces aligned horizontally and at the same height, and at the middle part in the width direction,
A large number of female screw holes 5 for attaching a work fixing jig are provided at regular intervals along the longitudinal direction, and the height of the table surface and the tip of the lower nozzle 3 are matched as shown in FIG. is there.

In the embodiment of the wire fixing method for a wire electric discharge machine according to the present invention, as shown in FIGS. 1 and 2, four fixing jigs 21 are mounted on a pedestal 4 opposed to the left and right sides. Are mounted so as to protrude into the work processing area 2, and the four corners of the surface of the work W, which is a plate body having the front and back surfaces formed in parallel on the front surface of the jig 21, are brought into close contact with each other.
The work W is connected to the work W via the stopper 7.
Is held parallel to the table surface and at the same height as the tip of the lower nozzle. The work W has its front and back surfaces formed in parallel by polishing or milling.

There are various types of methods for connecting the jig 21 and the work W via the stopper 7, and the structure of the stopper 7 differs depending on the structure of the connecting portion between the jig 21 and the work W. For example, as shown in FIG. 2, a bolt hole 6 is provided in a corner portion or an edge portion of the work W so as to penetrate the work W in a vertical direction. When provided, the work W and the jig 21 are connected by aligning the bolt holes 6 with the removal holes 26 and screwing the bolts B serving as the stoppers 7 from above. The head of the bolt B is housed in the hole 26 to prevent the upper nozzle 3 from hitting the jig 21, and the screw portion of the bolt B is housed in the bolt hole 6 to lower the nozzle. The nozzle 3 on the side can contact the entire back surface of the work W.

As shown in FIG. 6, there is also a method in which the bolt hole 6 and the hole 26 are aligned with each other, and the work W and the jig 21 are connected by the stopper 7 composed of the screw rod 71 and the nut 72. Note that a screwdriver 71 has a leading end formed with a slot for the driver.

Further, as shown in FIGS.
When the workpiece W is provided with the hole 8 penetrating in the vertical direction and the workpiece W is provided with the hole 8 penetrating in the vertical direction, the support block 9 is inserted into the hole 8 using the stopper 7 composed of the bolt B and the support block 9. The work W and the jig 21 are connected by screwing the bolts B so that the bolt holes 6 of the support block 9 and the holes 26 of the jig coincide with each other.

The support block 9 has a size and a shape that can fit in the hole 8 without looseness, and has a bolt B
Is provided in a state penetrating vertically. More specifically, when the hole 8 is a counterbore having a larger diameter at the lower portion as compared to the upper portion as shown in FIG. 3 or a through hole whose diameter is expanded downward as shown in FIG. It has a cylindrical fitting portion 31 that fits into the upper part of the hole 8, and a stopper portion 32 that is continuous below the fitting portion 31 and protrudes in a flange shape. When the hole 8 is a bolt hole having a larger diameter than the bolt B as shown in FIG. 5, the support block 9 is a screw having a size to be screwed into the bolt hole.

As shown in FIG. 7, a bolt hole 6 is provided at the front end of the jig 21. When the work W has a hole 26, for example, a counterbore whose lower part is larger than its upper part, the bolt hole 6 and the seat are formed. The jig 21 and the work W are connected by aligning the counterbore 26 and screwing the bolt B serving as the stopper 7 from below. In this case, it is important that the head of the bolt B fits into the counterbore 26. If the bolt hole 6 or the hole 8 is not formed in the work W in advance, it is necessary to form the bolt hole 6 or the hole 8 in a place where there is no problem in using the work W.

In the above-described method of fixing the work, the work W can be fixed only by tightening the bolt B constituting the stopper 7 until it cannot be screwed, so that the work of fixing the work W can be easily performed.

The jig 21 has a joining surface to be placed on a table,
The method of using a workpiece whose distance to the front surface of the back surface matches the thickness of the work W is used as means for holding the back surface of the work W fixed to the jig 21 parallel to the table surface and at the same height position. Is desirable. Further, when using the jig 21 having the above-mentioned wide gap with respect to the thickness of the work W, a plate-shaped member is provided between the tip of the jig 21 fixed to the table 1 and the work W as shown in FIG. Jig 2
There is a method of compensating for the insufficient thickness of the work W by aligning the through hole 26 of the first, the through hole 42 of the spacer 41 and the bolt hole 6 of the work W and connecting them with the stopper 7. further,
In the case of using the jig 21 having the above-described small gap with respect to the thickness of the work W, a plate-shaped intermediate member 43 is interposed between the intermediate portion of the jig 21 and the table 1 as shown in FIG. And
The mounting hole 25 of the jig 21, the through hole 44 of the intermediary member 43, and the female screw hole 5 of the table 1 are aligned and connected by the tightening bolt 11, so that the jig 21 is positioned higher by the thickness of the intermediary member 43. There is a method of fixing the work W to compensate for the excess thickness of the work W.

As shown in FIGS. 1 and 10, a first embodiment of a work fixing jig 21 according to the present invention comprises a work 22 provided at both ends of a mounting portion 22 fixed on a table 1 with tightening bolts 11. The connecting portion 23 for suspending and supporting W is stepped upward and protrudes in the longitudinal extension direction of the mounting portion 22. The fastening bolt 11 can be formed of a screw rod and a nut, similarly to the stopper 7 shown in FIG.

The mounting portion 22 has a prismatic shape, the lower surface of which is a horizontal joint surface 24 for mounting on a table surface, and the fixing position of the fastening bolt 11 can be adjusted along the longitudinal direction of the intermediate portion in the width direction. The mounting hole 25 is provided so as to penetrate from the upper surface to the lower surface. Further, the position where the connecting portion 23 protrudes into the processing area 2 can be adjusted by adjusting the fixing position of the fastening bolt 11. In addition, the mounting part 22 is shown in FIG.
As shown in FIG.
Is screwed into the female screw hole 5 of the table 1 to fix the mounting portion 22 with the head 13 of the tightening bolt 11. It is.

As shown in FIG. 10, the connecting portion 23 is provided with a hole 26 for a bolt B constituting the stopper 7 so as to penetrate from the upper surface to the lower surface. The mounting surface 27 is formed in parallel with the bonding surface 24 and above the bonding surface 24. Also, the height of the mounting surface 27 is different between the right connecting portion 23 and the left connecting portion 23 in the drawing, and the workpieces W having different thicknesses are provided.
Are connected. The hole 26 is a counterbore that is large enough to fit the head of the bolt B constituting the stopper 7 without play.

Further, as shown in FIG. 7, the second embodiment of the work fixing jig 21 of the present invention is characterized in that bolt holes 6 are provided instead of the holes 26 of the first embodiment.

The work fixing jig 21 of the above embodiment is
When the tip of the lower nozzle 3 is used in a wire-cut electric discharge machine having a structure having the same height as the table surface, it is formed between the joining surface 24 of the mounting portion 22 and the mounting surface 27 of the connecting portion 23. If a work W having the same thickness as the height of the work is used, an ideal processing form in which the tip of the lower nozzle 3 contacts the back surface of the work. When used in a wire-cut electric discharge machine having a structure in which the tip of the lower nozzle 3 is slightly lower than the table surface, a work piece having the same thickness as the height formed between the joint surface 24 and the mounting surface 27 is used. If W is used, a gap is formed between the tip of the lower nozzle 3 and the tip of the lower nozzle 3 on the back surface of the workpiece, but the workpiece having the same thickness as the height formed between the tip of the lower nozzle 3 and the mounting surface 27 is formed. If W is used, an ideal processing form is obtained.

The method for fixing the work of the wire electric discharge machine according to the present invention and the jig used for the same are not limited to the above embodiment. For example, the work fixing jig 21 may have a structure having the connecting portion 23 only at one end of the mounting portion 22. Further, the mounting hole 25 formed in the mounting portion 22 is not limited to an elongated hole provided along the longitudinal direction, and may be a round hole. The hole 26 formed in the connecting portion 23 is not limited to the round hole shape, but may be a long hole shape. In the case of the long hole shape, a connection portion with the work W can be adjusted. The work fixing method is not limited to the U-shaped table, a table in which a plurality of pedestals are arranged facing each other, a table in which an L-shape is arranged,
Alternatively, it can also be used for a structure having a horizontal frame-shaped table. Further, the number of the jigs 21 for fixing the work W is not limited to four. For example, a thin and small work W can be stably fixed with the two jigs 21.
Other works W can be stably fixed if there are at least three works W.

[0030]

According to the method for fixing a work of a wire cut electric discharge machine according to the present invention, a jig for fixing a work is selected according to the thickness of a work which is a plate body whose front and back surfaces are parallel, and at least two jigs are set on a table. The jig is fixed with its tip protruding into the work processing area, and the jig tip and the work are connected via a stopper, so that the horizontal mounting surface provided on the back of the jig tip The surface of the work is brought into close contact with the surface of the work, and the back surface of the work can be stably held parallel to the table surface and at the same height position as the tip of the lower nozzle. By holding the back surface of the work parallel to the table surface, the setting of the perpendicularity of the wire to the work becomes accurate, and as a result, high-precision processing can be performed. In addition, by holding the back surface of the work at the same height position as the tip of the lower nozzle, an ideal state where the lower nozzle is in contact with the back surface of the work is obtained. In addition, the success rate of automatic wire connection is improved. Furthermore, in this work fixing method, the work is held so as to be hung by a jig via a stopper, and since the stopper is arranged above the back of the work, nothing protrudes from the back of the work. As a result, there is no danger that the lower nozzle or the like will hit the jig, so that the processing operation can be performed continuously.

According to a second aspect of the present invention, when the distance between the mounting surface of the jig directly fixed to the table and the tip of the lower nozzle is wider than the thickness of the work, a lower space is provided between the mounting surface and the work. By interposing a spacer having a thickness such that the back surface of the work is in contact with the tip of the nozzle on the side, the same effect as the above-described invention can be obtained.

According to a third aspect of the present invention, when the distance between the mounting surface of the jig directly fixed to the table and the tip of the lower nozzle is smaller than the thickness of the work, the lower part between the table and the jig is provided. By interposing an intermediate member having a thickness such that the back surface of the work is in contact with the tip of the nozzle on the side, the same effect as the above-described invention can be obtained.

According to the work fixing jig of the fourth aspect, since the mounting portion having the joining surface to be mounted on the table is provided with the mounting hole, it can be fixed to the table with the tightening bolt. At least one end is provided with a connecting portion for suspending and supporting the work, and the connecting portion is provided with a hole, so that the hole and the bolt hole or hole provided in the work are matched, and the connecting portion and the work are stopped. By connecting via, the surface of the work can be brought into close contact with the mounting surface provided on the back surface side of the connecting portion, and the mounting surface of the connecting portion is located above the joining surface of the mounting portion and parallel to the joining surface. Parallel to the table surface by selecting a jig that matches the height between the tip of the lower nozzle and the mounting surface and the thickness of the work. Of the lower nozzle The workpiece can be held in flush with the edge.

According to a fifth aspect of the present invention, the jig for fixing a work is such that the bolt hole of the connecting portion is aligned with a hole or a hole provided in the work, and the connecting portion is connected to the work via a stopper. The same effect as that of the work fixing jig of claim 4 can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an embodiment of a work fixing method for a wire cut electric discharge machine according to the present invention.

FIG. 2 is a longitudinal sectional view of an essential part showing an example of connecting a work fixing jig and a work via a stopper.

FIG. 3 is a longitudinal sectional view of a main part showing another example of connecting a work fixing jig and a work via a stopper.

FIG. 4 is a longitudinal sectional view of a main part showing another example of connecting a work fixing jig and a work via a stopper.

FIG. 5 is a vertical sectional view of a main part showing another example of connecting a work fixing jig and a work via a stopper.

FIG. 6 is a longitudinal sectional view of a main part showing another example of connecting a work fixing jig and a work via a stopper.

FIG. 7 is a vertical sectional view of a main part showing another example of connecting a work fixing jig and a work via a stopper.

FIG. 8 is a perspective view of a main part of a wire cut electric discharge machine used in the present invention.

FIG. 9 is a schematic diagram illustrating a height relationship between a nozzle and a table.

10A and 10B are plan views showing an embodiment of a work fixing jig according to the present invention, and FIG. 10B is a cross-sectional view taken along line XX of FIG. 10A. is there.

FIG. 11 is a vertical sectional view of a main part showing a work fixing method in which a thickness adjusting spacer is interposed between the work fixing jig and the work.

FIG. 12 is a vertical sectional view of a main part showing a work fixing method in which a work fixing jig is fixed with a thickness adjusting intermediary member placed on a table.

FIG. 13 is a perspective view of a main part showing a method for fixing a work of a conventional wire cut electric discharge machine.

FIG. 14 is a vertical sectional view of a main part showing an example of a conventional work fixing method.

FIG. 15 is a vertical sectional view showing a main part of another example of a conventional work fixing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Table 2 Work area 3 Nozzle 6 Bolt hole 7 Stopper 11 Tightening bolt 21 Work fixing jig (jig) 22 Placing part 23 Connecting part 24 Joining surface 25 Mounting hole 26 Extraction hole 27 Mounting surface 41 Spacer 42 Intermediate Material W Work

Claims (5)

[Claims] 1. A wire cut electric discharge machine comprising a horizontal table (1) surrounding a workpiece machining area (2) and having a pair of nozzles (3, 3) vertically opposed to a table surface. 1) A work fixing jig (21) is attached to at least two places on the upper side with its tip protruding into the work processing area (2), and is attached to the tip of a lower nozzle (3) serving as a reference. On the other hand, a horizontal mounting surface (27) provided on the back surface of the front end of each jig (21) is provided above the work (W), which is a plate body whose front and back surfaces are parallel to each other. The work (W) is connected to the mounting surface (27) of the jig (21) by connecting the tip and the work (W) via a stopper (7) arranged above the back surface of the work (W). The work (W) flat against the table surface. And the work fixing method of the wire-cut electric discharge machine, characterized in that are holding the workpiece (W) in a state where the same height position as the front end of the lower nozzle (3). 2. A wire-cut electric discharge machine comprising a horizontal table (1) surrounding a workpiece machining area (2) and having a pair of nozzles (3, 3) vertically opposed to a table surface. 1) A work fixing jig (21) is attached to at least two places on the upper side with its tip protruding into the work processing area (2), and is attached to the tip of a lower nozzle (3) serving as a reference. On the other hand, the horizontal mounting surface (27) provided on the back surface of the front part of each jig (21) is equivalent to the thickness of the work (W), which is a plate body having both front and back surfaces parallel, and the thickness of the spacer (41). A mounting surface (27) for each jig (21) provided above each
A spacer (41) is interposed between the jig (21), the spacer (41) and the work (W) above the back surface of the work (W). The work (W) is brought into close contact with the mounting surface (27) side of the jig (21) via a spacer (41) by being connected via the arranged stopper (7), and the back surface of the work (W) is connected. The workpiece (W) is held in a state where the workpiece (W) is held parallel to the table surface and at the same height position as the tip of the lower nozzle (3). . 3. A wire-cut electric discharge machine comprising a horizontal table (1) surrounding a workpiece machining area (2) and having a pair of nozzles (3, 3) vertically opposed to the table surface. 1) A work fixing jig (21) is placed in at least two places above with an intermediary member (43) interposed, and each jig (21) is placed on the table (1), and its tip is Each jig (21) is attached in a state of protruding into the work processing area (2) and is attached to the tip of the lower nozzle (3) serving as a reference.
A horizontal mounting surface (27) provided on the back surface of the front end is provided above the work (W), which is a plate body whose front and back surfaces are parallel to each other, so that the front end of each jig (21) and the work (W) are attached. And the jig (21) are connected to each other via a stopper (7) disposed above the back surface of the work (W).
7) The surface of the work (W) is brought into close contact with the work (W), and the back surface of the work (W) is parallel to the table surface and at the same height position as the tip of the lower nozzle (3).
A method for fixing a workpiece of a wire-cut electric discharge machine, characterized by holding a workpiece. 4. A joining surface (2) to be placed on a table (1).
A connecting portion (23) for suspending and supporting the work (W) protrudes from at least one end of the mounting portion (22) provided with 4), and a work (W) is provided on the back side of the connecting portion (23). ) Is formed above the joining surface (24) and parallel to the joining surface (24), and the mounting portion (22) is provided with a tightening bolt (11) on the table (1). ), And a through hole (26) for fixing the work (W) by hanging it with the stopper (7) in the connecting portion (23) in the vertical direction. A jig for fixing a workpiece, wherein the jig is provided on a workpiece. 5. A jig for fixing a work according to claim 4, wherein a bolt hole (6) is provided instead of the hole (26).