JP2867105B2 - Wire 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 a wire electric discharge machine capable of performing electric discharge machining by moving a wire electrode and a workpiece relatively while moving the wire electrode in a lateral direction, and enabling automatic loading of the wire electrode.

[0002]

2. Description of the Related Art As a first prior art, Japanese Patent Publication No. 56-1013
There is a wire cutting device disclosed in Japanese Patent Application Publication No. 0-205. This is a receiving device that guides the wire electrode with high-pressure water ejected from a fluid jet nozzle, inserts the wire electrode into a processing start hole formed in a work, and captures the wire electrode in a subsequent stage when the wire electrode is automatically loaded. The present invention relates to a wire electric discharge machine provided with.

A second prior art is disclosed in Japanese Patent Publication No. 55-46807.
There is a wire cut electric discharge machine equipped with an automatic wire setting mechanism disclosed in Japanese Patent Application Laid-Open Publication No. HEI 9-303, 1988. This is because, when performing automatic loading of the wire electrode, a suction pipe is pierced from the lower part of the work into a processing start hole drilled in the work, and the wire electrode is inserted through the suction pipe while sucking and guiding the wire electrode. The present invention relates to a wire electric discharge machine in which a pipe is lowered to capture a wire electrode.

As a third prior art, Japanese Patent Publication No. 3-41288
There is a traveling wire EDM device disclosed in Japanese Patent Application Laid-Open Publication No. H11-163,873. this is,
When performing electric discharge machining while giving relative movement between a workpiece mounted by being immersed in a machining fluid in a machining tank and a wire electrode supported and traveled by a pair of upper and lower wire guides, the electric discharge machining penetrates the wall of the machining tank. The present invention relates to a wire electric discharge machine equipped with a sealing means so that a machining fluid does not leak from a penetrating portion even when a relative movement is made between an arm supporting a lower wire guide provided and a machining tank. is there.

[0005]

In a wire electric discharge machine in which a workpiece is immersed in a machining fluid and electric discharge machining is performed while the wire electrode travels in a lateral direction, when the wire electrode is automatically loaded, the first conventional technique is used. When the technology is applied, even if high-pressure water is jetted from the fluid jet nozzle in the working fluid, the pressure immediately drops, and the wire electrode cannot be guided. Even if the work fluid is once discharged and the peripheral part of the work is exposed to air, the wire electrode is inserted in the work start hole of the work in the horizontal direction. Unlike technology, the success rate of automatic loading of wire electrodes is reduced. In recent wire electric discharge machining, for example, the diameter is 0.
0.3 mm with a thin wire electrode of 1 mm or less drilled in the workpiece
There is a need to insert the hole into a fine processing start hole having the following inner diameter.

The second prior art has a structure in which a suction pipe has to penetrate a processing start hole of a work.
This cannot be applied to a wire electric discharge machine in which a wire electrode must be inserted into a fine machining start hole. The third
The prior art is a wire electric discharge machine in which a wire electrode travels in a vertical direction, and therefore, an arm supporting a lower wire guide has to penetrate a machining tank. The sealing means provided in this penetrating portion not only complicates the structure but also causes sliding resistance of the relative movement between the work and the wire electrode, and deteriorates the work accuracy of the work.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to solve the problems involved in the prior art described above. It is therefore an object of the present invention to provide a wire electric discharge machine capable of reliably and quickly performing automatic loading of a wire electrode. Another object is to provide a wire electric discharge machine having a structure in which a support arm of a wire guide does not penetrate a machining tank.

[0008]

According to the present invention, in order to achieve the above-mentioned object, the electric discharge machining portion is floated on the machining fluid level when the wire electrode is automatically loaded, and the electric discharge machining portion is immersed in the machining fluid at the time of machining. A reciprocating means is provided, and after the wire electrode is automatically loaded on the machining liquid surface, the workpiece and the wire electrode are immersed in the machining liquid to perform electric discharge machining. In addition, the wire electrode fed out toward the machining start hole of the work by the wire feeding means is pulled through the work start hole of the work by the wire suction means provided opposite to sandwich the work, and the wire electrode can be automatically loaded. It was made. More specifically, it has each configuration as described below.

(1) In a wire electric discharge machine which performs electric discharge machining by moving a wire electrode and a work relatively while moving the wire electrode in a lateral direction, a wire electrode provided at each of both sides of the work to run the wire electrode. Pinching possible,
A pair of wire guides for guiding, advancing and retreating means for floating the electric discharge machining part on the machining liquid surface during automatic loading of the wire electrode, and immersing the electric discharge machining part in the machining liquid during machining, and a machining start hole provided in the work Wire feeding means for feeding the wire electrode toward the workpiece, and wire pulling means for catching and pulling the wire electrode inserted through the processing start hole of the work, after automatically loading the wire electrode on the processing liquid surface A wire electric discharge machine wherein the work and the wire electrode are immersed in a machining fluid to perform electric discharge machining.

(2) The wire discharger according to the above (1), further comprising a wire suction means provided opposite to the wire feeding means so as to sandwich the work and drawing a wire electrode through a processing start hole of the work. Processing machine.

(3) In a wire electric discharge machine for performing electric discharge machining by relatively moving the wire electrode and the work while moving the wire electrode in the lateral direction, the wire electric discharge machine is provided on both sides of the work, and guide portions are provided. A pair of openable and closable wire guides for holding and guiding the wire electrode in a closed state so as to be able to travel and for releasing the wire electrode when the guide portion is in an open state, and a wire toward a machining start hole provided in the workpiece. Wire feeding means for feeding an electrode; wire suction means provided to face the wire feeding means so as to sandwich the work, and for drawing the wire electrode through a work start hole of the work when automatically loading the wire electrode; and processing of the work. Insert the start hole and pull in with the wire suction means
Wire electric discharge machine equipped with a wire traction means, the towing captures the wire electrode's.

(4) It is provided on both sides of the pair of wire guides, and retreats to the upper part during automatic loading of the wire electrode,
The wire electric discharge machine according to the above (3), further comprising a pair of guide rollers which descend to the wire guide position in synchronization with the work after completion of the automatic loading.

[0013]

When the wire electrode is automatically loaded, the work immersed in the working fluid is raised by using the advancing / retreating means to expose the working fluid to the surface of the working fluid, or the work is discharged to discharge the workpiece onto the working fluid surface. Exposure to Using a wire feeding means and a wire pulling means, a wire electrode is inserted into a processing start hole formed in the work, and after confirming that the wire can be pulled, the work is lowered using the advancing / retreating means and immersed in a processing liquid, or processed. The liquid is supplied to the processing tank, and the work is immersed in the processing liquid to perform wire electric discharge machining.

Since the wire electrode is automatically loaded by retracting the work into the air by the advancing / retreating means, the success rate of the automatic loading is high. After the automatic loading, the work is returned to a predetermined position in the working fluid and immediately subjected to electric discharge machining. Can start. By using the wire suction means, the success rate of automatic loading of the wire electrode can be further improved. Also, after the automatic loading of the wire electrode is completed, the pair of guide rollers is lowered to the wire guide position in synchronization with the work at the raised position,
The wire electrode can be guided and supported at a predetermined position without breaking.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The specific constitution of each member assembling the apparatus of the present invention may be appropriately adjusted within the technical level in the art at the time of filing the present application. In view of the fact that the design change described above can be made, the gist of the present invention should not be interpreted in a limited manner based only on the structure and shape of the present embodiment without special reasons.

FIG. 1 is an overall configuration diagram of an embodiment of a wire electric discharge machine according to the present invention, FIG. 2 is a wire feeding unit provided with a wire guide nozzle, FIG. 3 is a wire suction unit, and FIG. FIG. 5 is a conceptual perspective view of the wire guide.
FIG. 6 shows an automatic wire loading flow A, FIG. 7 shows an automatic wire loading flow B, and FIG. 8 shows an automatic wire loading flow C.

In FIG. 1, a represents a wire bobbin in order along a moving direction of a wire electrode (hereinafter referred to as a wire) 1;
b is a guide roller, c and d are a pair of wire feeding rollers, 3 is a motor with an encoder for driving the feeding roller d, and the motor is speed controlled by an angle sensor.
c is a pinch roller. Numeral f denotes a dancing roller pivotally supported at one end of the swing arm 5. An angle sensor 7 is attached to the e-axis at the other end of the arm, and the feed motor 3 is controlled according to the output. Reference numeral 9 denotes a tension adjusting weight slidable on the swing arm 5. The weight is moved along the arm to adjust the weight applied to the dancing roller f to adjust the tension of the wire 1.

G and g 'are guide rollers, h and i, respectively.
Is a pair of wire feed rollers attached to the wire feeding unit 11, and a roller i is a one-way clutch (see FIG.
(Not shown) and is driven by a wire feed motor 13. h is a wire support and a feeder. Shiyu knit 11 decremental wire, wire feed roller h, i,
It mainly comprises a wire feed motor 13, a wire guide nozzle 15, and a cutter 17, and the detailed structure thereof will be described with reference to FIG.

Reference numeral 15 denotes a wire guide nozzle attached to the wire feeding unit 11, and the direction and the moving direction of the nozzle are linearly directed to the machining start hole of the work 19 through the shearing hole of the cutter 17. In the present embodiment, the work mounting portion is moved so that the machining start hole of the work is brought to a position directly opposite to the moving direction of the guide nozzle 15. The work mounting portion is relatively movable in the x-axis and y-axis directions of the device.

Reference numerals j and k ₁ denote guide rollers and wire pressing rollers, each of which is at a fixed position. Roller j is shown at a lower virtual line position in the figure, and roller k ₁ is shown at a virtual line immediately above. It is configured to be able to retreat to the upper position, respectively. Reference numeral 21 denotes a pair of wire guides, which are provided at right and left positions with the work 19 interposed therebetween and on a base having a processing tank 23. The machining bath 23 is filled with a machining fluid, and the electric discharge machining part can be immersed in the machining fluid. FIG. 4 also shows the detailed structure of the wire guide 21.
Will be described. k ₂ is a wire pressing roller shows a place located in position, the roller k ₂ is configured to be able to retreat to the upper position shown in phantom in FIG.

L and m are a pair of pulling rollers, and the rollers m
Is driven by a traction motor 25 with an encoder.
The traction roller m is provided so as to be displaceable together with the traction motor 25 at a position indicated by a virtual line on the lower side in the figure. Roller l is a pinch roller and is at a localized value. Therefore, the roller 1 functions as a pinch roller only when the traction roller m and the traction motor 25 are at the solid line position. Reference numeral 27 denotes a suction unit, and the center of the unit is on the same line as the wire guide nozzle 15. Machining start hole of the workpiece 19, only when automatic wire loading, is guided on the same line.

FIGS. 2A and 2B are detailed views of the wire feeding unit 11, wherein FIG. 2A is a side view, and FIG.
In the figure, reference numeral 15 denotes a wire guide nozzle which is formed of a cylindrical member and has an air blow cover 29 provided with a wire receiving hole at the bottom thereof, and the end of the wire 1 fed into the receiving hole by the wire feed rollers h and i is moved by an air flow. This is guided to the nozzle opening side. Therefore, even if the tip of the wire is slightly bent, it is accurately guided. The wire guide nozzle 15 is attached to the wire feeding unit mounting base via a slide bearing, and is provided so as to be able to reciprocate along the moving direction of the wire.

A wire guide nozzle moving (fluid pressure) cylinder 31 is provided on the mounting table, and its plunger is connected to the wire guide nozzle 15. By operating the cylinder, the nozzle 15 tip 33 passes through the shearing hole of the cutter 17. work
Move and reciprocate to the 19 (processing start hole) side. Reference numeral 17 denotes a shearing cutter having a pair of cutting blades. In a fixed position, the shearing holes of the cutter 17 are aligned by the action of a cylinder return spring 35, but the wire cutting cylinder 37 mounted between the pair of cutting blades is operated. Then, the cutting blade is moved and crossed, and the wire 1 passing through the shearing hole is cut. Of course, the wire guide nozzle 15 can pass through the shearing hole of the cutter 17 only when the shearing cutter is at a fixed position.

Reference numeral 39 denotes a wire collecting cylinder provided with a suction port opened between the cutter 17 and the work 19, thereby sucking and collecting the remaining portion of the wire 1 cut by the cutter.
FIG. 3 shows a detailed side cross section of the suction unit 27, which is composed of a cylindrical member 41 attached to the suction unit mounting base via a slide bearing. In the figure, reference numeral 43 denotes a nozzle with a pad formed of an elastic body. Is attached to one end of the cylindrical member 41, and when the end face contacts the side surface of the work 19 including the processing start hole, the space therebetween is sealed against the outside air. So that it can be inhaled.

Reference numeral 45 denotes a buffer spring, which is provided between the suction unit mounting base and the cylindrical member 41, and has an effect of generating an appropriate contact pressure of the nozzle 43 with the work 19.
A suction pipe 47 is connected to the other end of the cylindrical member 41, and exhausts the air sucked from the opening of the nozzle 43 through the cylindrical member 41 through the suction pipe 47. 49 is a cylindrical member
41 is a contact sensing rod disposed at the middle position of the longitudinal axis of 41, and 51 is the rod
When the wire 1 passes between the rod 49 and the sensor 51, it is detected that the tip of the wire has moved to the suction unit 27 side through the machining start hole of the workpiece 19 when the wire 1 passes between the rod 49 and the sensor 51. Then, the suction unit 27 holding the wire 1 is moved backward at the same speed as the wire transfer speed.

FIG. 4 is a schematic perspective view of the right wire guide 21, in which 1 is a wire, for example, having a diameter of 0.03 mm, 53
Is a guide arm pivotally supported. A wire press guide 55 and a power supply 57 are attached to one end of the guide arm, and the guide arm 53 is rotated in a direction to separate the press guide 55 and the power supply 57 from the wire 1. A guide open piston 59 is provided. Reference numeral 61 denotes a V-grooved guide provided so as to face the wire pressing guide 55 with the wire 1 interposed therebetween. A V-groove for guiding the wire 1 is provided on the upper surface.

A guide closing spring 63 is attached to the other end of the guide arm 53.
By the urging of 3, the wire 1 is sandwiched between the wire pressing guide 55 and the V-groove of the V-grooved guide 61 to guide the wire. Exciting the guide open piston 59 causes the guide arm 53 to move the guide close spring 63.
Of the wire holding guide 55 and V
Open between the grooved guide 61 and wire 1
It can be released from de 21. The power supply 57 supplies or collects electric power to or from the wire 1. The left wire guide 21 has the same configuration that is symmetrical. In this manner, the pair of wire guides 21 are disposed on the left and right sides of the work 19, respectively, and pinch and guide the wire 1.

FIGS. 5 to 8 show the automatic wire loading flow of the present embodiment. After the machining of the workpiece is completed, the machining power is turned off, the wire feed is stopped, and the machining fluid flushing is turned off.
Then, it shows a process at the time of instructing automatic wire loading at the next processing position. This will be described below with reference to FIGS. 1, 2 and 4.

In the flow shown in FIG. 5, the process for automatically loading the wire at the next processing position is as follows. First, the feed motor 3 is turned on to swing the swing arm 5 to the lower position (step S ₁ ). The cutting cylinder 37 of the wire feeding unit 11 shown in FIG.
Cutting the wire 1 (step S _2). Traction motor 25
ON, and to discharge the one of the wire 1 cut while measuring the wire length at the motor encoder (Step S _3). The workpiece 19 is moved to the next processing position by moving in the x-axis and y-axis directions (step S ₄ ), and the stage of the instruction for automatic wire connection is made (step S ₅ ). At this point, the work 19 is floating from the working liquid level 24.

In the left and right wire guides 21 and 21,
The guide open piston 59 is operated to swing the guide arm 53 against the bias of the spring 63 to open the wire pressing guide 55 (step S ₆ ).
With releasing, (step _S 7 _a) traction rollers m below the position shown in FIG. _1, k 1, a _{k 2} rollers at the upper position (Step _S 7 b) the j rollers the lower position (step S
_{7 c),} it is moved respectively, causing the wire loading position to leave a wire guide or press with rollers.

[0031] To ON suction of the suction unit 27 in FIG. 3 (step S ₈ a) On the other hand, were to ON air blow Figure 2 shows the wire guide nozzle 15 (Step S ₈ b) Later, the right bound of the suction unit (step S ₉ a), while in synchronization with the wire feeding unit 11 is unwinding Okugyo the wire 1, go left cutter unit 11 (step S ₉ b) and a wire guide nozzle 15 to the left to go (step S ₉ c), nozzle 15
Lightly contact the tip 33 of the work 19 with the work 19.

In FIG. 1, the wire feed motor 13 is turned on, the feed motor 3 is turned on by a signal from the e-axis angle sensor 7 which swings, and the wire feed length is measured by an encoder provided with the motor. while, while being guided by the air passing the wire 1 to the machining start hole of the workpiece 19 (step S _10).

FIG. 6 shows a flow following the step A in the flow of FIG. 5. In FIG. 6, the suction unit 27 is moved 5 mm to the left (step S ₁₁ ), and the tip of the suction unit is moved to the work 19.
Slightly with increasing amount of suction air away from the suction wire length in the suction unit 27 measured by the encoder of the delivery motor 3 attached, the wire feed motor 13 is OFF, the stop wire feed (step S _12).

[0034] In referring to FIG. 3, to advance the contact sensing rod 49 (ADV) (step S _13), the contact sensing step by contact sensing rod 49, Kanchiko 51 in the suction unit (step S ₁₄₎
In determining the presence or absence of the wire 1 in the suction unit 27, if yes, the wire feed motor 13 is ON, the process proceeds to the wire Okugyo step (step S _15). If no, once retract the contact sensing rod 49 (RET) (step S _17), step S
_Retry from ₁₃ . After repeating this three times (step S ₁₆ ), the process proceeds to step C described below. Returning to FIG. 1, subsequent to the wire Okugyo step (step S _15), the suction unit 27 to go left wire feed speed and the speed (step S ₁₈ a) and the wire guide nozzle 15 right goes (step S ₁₈ b) ,
Move the wire feeding unit 11 to the right (step S
₁₈ c), separate them from the work 19.

Next, the rollers k ₁ and k ₂ are at the middle position (step S ₁₉ a), and the pulling rollers m are at the middle position (step S ₁₉ b).
And j roller moves to the upper position (the step S ₁₉ c),
Each of the rollers occupies a position in contact with the wire 1. At this stage, the work 19 and the rollers k ₁ and k ₂ are synchronously moved to the processing position (step S ₂₀ ), and the contact sensing rod 49 is retracted (RET) (step S ₂₁ ) to suck the wire 1. Release from unit 27. At this point, the work is immersed in the working fluid. Traction roller m to move to the upper position (step S ₂₂₎ in contact with the pinch roller l, sandwiching the wire 1 between the pulling roller m and the pinch roller l.

[0036] The wire holding guide 55 closed by disabling the guide opening piston 59 of the left and right guide 21 and 21 (step _{S 23),} sandwiching the wire between them. Here, while the OFF suction of the suction unit 27 (step _{S 24} a), the wire guide nozzle 15
The air blowing and OFF (step _S 24 b), and ON the traction motor 25, driving the wire (step S
₂₅ ) and discard in a wire box (not shown) .

[0037] Figure 7 shows the B-stage and subsequent flow of FIG. 6, with reference to FIG. 1, [at e shaft angle sensor neutral position OK] loading possibility determination (step S _26), if yes , OFF the traction motor 25, and traction stop wire (step S _27), the END. In addition, dormant if no (step S _28), warning display (step S _29), the END.

FIG. 8 shows an automatic loading failure retry flow, and shows a flow after step C in FIG. In the figure, to remove the automatic loading failure wires to ON suction wire collecting tube 39 adjacent to the wire feeding unit 11 (step S ₃₀ a), the air blow of the wire guide nozzle 15 and OFF (step S ₃₀ b ), for wire cutting preparation, right go wire guide nozzle 15 (step S _31). Meanwhile wire was cut by actuating the wire cutter 17 (step S _32), also a contact sensing rod retracts (RET) (step S _33), the suction unit 27 to 5mm right goes (step S ₃₄ a), the wire guide nozzle 15 to the left to go (step S ₃₄ b), contacting the nozzle tip 33 to the workpiece 19.

[0039] Therefore, the wire collecting tube 39 and OFF (step S ₃₅ a), the air blow of the wire guide nozzle 15 and ON (step S ₃₅ b), D stage of FIG. 5, i.e., step S ₁₀ phase of Return to the previous position. If the retry of the automatic loading has failed twice (step _S36 ), the operation is paused (step _S37 ), a warning is displayed (step _S38 ), and EN is set.
D. The flow of one embodiment of the automatic wire loading in the apparatus of the present invention is as described above.

Further, the wire feeding unit of the present embodiment
In the configuration of FIG. 11, the wire 1 is sent out while being guided by the air flow. However, the wire 1 may be sent out while being guided by the liquid flow. Further, in this embodiment, the workpiece is x
Although the lifting and lowering is performed by the moving means of the axis and the y-axis, the processing liquid may be discharged and supplied from the processing tank, and the workpiece may be moved up and down by moving the processing tank up and down.

[0041]

As described in detail above, the present invention relates to a wire electric discharge machine for performing electric discharge machining by relatively moving a wire and a work while moving the wire in a lateral direction, and providing an advancing / retreating means for machining the work with a machining fluid. Floating above the surface, the wire is automatically loaded, and after the automatic loading is completed, the workpiece is immersed in the machining fluid to perform electrical discharge machining, so the wire travels in the horizontal direction
Wai Ya automatic loading yet in the form of a wire electric discharge machine that can be performed reliably. Further, by providing the wire suction means, the success rate of the automatic wire loading can be improved.

Further, since the wire guide is made openable and closable so that the work is raised and lowered, the wire feeding means, the work start hole of the work and the wire suction means can be arranged in a straight line on the working liquid level, so that it is more reliable and quick. Automatic wire loading can be performed. After automatic loading of the wire, the workpiece is lowered to a predetermined position in synchronization with the pair of guide rollers, and the wire guide is closed so that electric discharge machining can be performed. the required Nari rather name provided, structure is simplified, can the relative movement between the workpiece and the wire without sliding resistance of the seal means, it is possible to also improve the machining accuracy.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an embodiment of a wire electric discharge machine according to the present invention.

FIG. 2 shows a wire feeding unit provided with a wire guide nozzle.

FIG. 3 is a sectional view of a wire suction unit.

FIG. 4 is a conceptual perspective view of a right wire guide.

FIG. 5 shows a wire automatic loading flow.

FIG. 6 is an automatic wire loading flow A.

FIG. 7 is an automatic wire loading flow B.

FIG. 8 shows a wire automatic loading connection wiring flow C;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wire 3 Feeding motor 5 Swing arm 7 Angle sensor 9 Weight for variable tension 11 Wire feeding unit 13 Wire feed motor 15 Wire guide nozzle 17 Cutter 19 Work 21 Wire guide 23 Work tank 24 Working liquid level 25 Traction motor 27 Suction unit 29 Air blow Cover 31 Cylinder for moving the wire guide nozzle 33 Nozzle opening 35 Cylinder return spring 37 Wire cutting cylinder 39 Wire collection cylinder 41 Tubular member 43 Nozzle 45 Buffer spring 47 Suction pipe 49 Contact sensing rod 51 Contact sensing element 53 Swing arm 55 Wire Presser guide 57 Electric supply 59 Guide open piston 61 Guide with V groove 63 Guide close spring

Claims (6)

(57) [Claims] 1. A wire electric discharge machine for performing electric discharge machining by relatively moving a wire electrode and a work while moving the wire electrode in a lateral direction, wherein the wire electrode is provided at both sides of the work so that the wire electrode can run. A pair of wire guides for pinching and guiding the electric discharge machining part on the machining fluid level during automatic loading of the wire electrode, and advancing / retreating means for immersing the electric discharge machining part in the machining fluid during machining, and provided on the workpiece. A wire feeding means for feeding a wire electrode toward a processing start hole; and a wire pulling means for capturing and pulling a wire electrode inserted through the processing start hole of the work, and automatically operating the wire electrode on a processing liquid level. After loading
A wire electric discharge machine wherein the work and the wire electrode are immersed in a machining fluid to perform electric discharge machining. 2. The wire electric discharge machine according to claim 1, further comprising a wire suction means provided so as to face the wire feeding means and sandwich the work, and to draw in a wire electrode through a work start hole of the work. 3. The wire electric discharge machine according to claim 1, wherein the advance / retreat means is a work elevating means for elevating the work. 4. The reciprocating means is a machining fluid supply / discharge means for removing a machining fluid, floating an electric discharge machining part on a machining fluid level, supplying a machining fluid, and immersing the electric discharge machining part in the machining fluid. The wire electric discharge machine according to claim 1. 5. A wire electric discharge machine for performing electric discharge machining by relatively moving a wire electrode and a work while running the wire electrode in a lateral direction, wherein the electric discharge machine is provided on both sides of the work, and a guide portion is closed. A pair of openable and closable wire guides for holding and guiding the wire electrode movably in the state, and releasing the wire electrode when the guide portion is open, and a wire electrode toward a processing start hole provided in the workpiece. A wire feeding means for feeding the wire, a wire suction means provided to face the wire feeding means and sandwiching the work, and pulling the wire electrode through a work start hole of the work at the time of automatic loading of the wire electrode; Through the hole , said wire suction means
A wire electric discharge machine, comprising: wire pulling means for capturing and pulling the wire electrode drawn in in (1) . 6. A pair of guide rollers provided on both sides of said pair of wire guides, retracted upward during automatic loading of wire electrodes, and lowered to said wire guide position in synchronization with said work after completion of automatic loading. The wire electric discharge machine according to claim 3 or 5, further provided.