JP4331119B2 - Wire electrical discharge machine - Google Patents

Description

  The present invention includes, for example, an automatic wire feeding device that supplies a wire constituting a very fine wire electrode to a wire feeding system, and a workpiece is discharged with discharge energy generated by applying an interelectrode voltage between the wire electrode and the workpiece. The present invention relates to a wire electric discharge machine for electric discharge machining.

  Conventionally, as shown in FIG. 7 or 8, the immersion type wire electric discharge machine has a Y table 18 placed on a machine base 15, and an X table 19 placed on the Y table 18 in a machining tank. 3 is installed. In addition, the wire electric discharge machine feeds the wire electrode 1 from the source bobbin 46 wound up to the machining area of the workpiece 2 and discharges the workpiece 2 to the waste wire hopper (not shown). ). A machining liquid 8 is placed in the machining tank 3, and the wire electrode 1 supplied from the source bobbin 46 is supplied to the machining area of the workpiece 2 through the upper head 4 in order to discharge-process the workpiece 2 installed in the machining tank 3. The wire electrode 1 consumed by the electric discharge machining of the work 2 is taken up by the guide roller 7, the feed pipe 9 and the take-up roller 17 by the water flow ejected from the water flow nozzle 16 provided below the lower head 5. In the work feeding system from the lower head 5 of the wire electrode 1 to the winding roller 17, a water flow is used. The lower head 5 is disposed on the lower arm 6 provided on the machine base 15. The feed pipe 9 is disposed through the lower arm 6.

  Further, as shown in FIG. 7, a wire electric discharge machine is known in which a draining portion 29 is provided immediately before the winding roller 17 so that the winding roller 17 is not wetted with water. In such a wire electric discharge machine, a water ejection nozzle 16 is provided in the vicinity of the guide roller 7, and the water fed together with the wire electrode 1 in the feed pipe 9 by the water flow ejected from the water flow nozzle 16 is drained by the draining portion 29. Water is drained and drained through a drain 28 to a filtration device (not shown). In the wire electric discharge machine, the water flow from the water jet nozzle 16 enters the feed pipe 9 through the lower surface side in the tangential direction of the guide roller 7, and at that time, the water flow is accompanied by the wire electrode 1 in the feed pipe 9. Then, the water is drained through the drain 28 at the draining portion 29, the wire electrode 1 is fed into the winding roller 17, is clamped by the winding roller 17, and sent out, and a waste wire hopper (not shown). Discarded.

  Further, as shown in FIG. 7, the wire feeding device in the conventional submerged wire electric discharge machine uses a discharge energy generated by applying an inter-electrode voltage between a thin wire electrode 1 and a work 2 as shown in FIG. In order to perform electric discharge machining, the wire electrode 1 is passed through a start hole or a machining slit 39 formed in the workpiece 2. The lower arm 6 provided in the machine base 15 passes through the long hole 38 of the processing tank 3 containing the processing liquid 8 and supports the lower head 5 in the roller housing 37. The processing tank 3 is installed on the X table 19, and the workpiece 2 is fixed on the X table 19 in the processing tank 3 by a clamp or the like. The upper head 4 is attached to the machine base 15 so as to be movable up and down. The work 2 is disposed between the upper head 4 and the lower head 5. On the downstream side of the lower head 5, a guide roller 7 rotatably supported by a roller housing 37 and a feed pipe 9 penetrating through the lower arm 6 are provided. The wire electrode 1, which is a waste wire after the workpiece 2 is subjected to electric discharge machining, is drawn out by a take-up roller 17 through a guide roller 7 and a feed pipe 9, and is guided by a guide plate or the like by a wire hopper or the like adjacent to the machining tank 3. Discarded. In order to insert the wire electrode 1 into the inlet 36 of the feed pipe 9 located in the roller housing 37, a water flow nozzle 16 for injecting a water flow into the feed pipe 9 is provided. The take-up roller 17 is provided with a draining portion 29 on the downstream side of the feed pipe 9, provided in the vicinity of the outlet 35 of the feed pipe 9 located outside the machine base 15, and attached to a bracket or the like provided on the machine base 15. It is attached.

  Conventionally, a wire electric discharge machine is known in which a liquid is prevented from coming into contact with a capstan roller and a pinch roller, and a wire electrode is prevented from being entangled with these rollers. The wire electric discharge machine is configured to cause a liquid to flow between a wire electrode that generates an electric discharge between a workpiece and a facing portion where the first roller and the second roller that are fed while sandwiching the wire electrode are opposed to each other. A wire conveying means for inserting the wire electrode between the rollers, and a drive for moving the tip of the wire conveying means to the vicinity of the opposing portion and moving the tip of the wire conveying means a predetermined distance from the opposing portion after the wire electrode is completed between the rollers. Means. The wire conveying means includes a guide member and a nozzle member that slides on the guide member, and the nozzle member moves on the guide member between the position where the roller is opposed and the distance between the nozzle member and the opposite position. It slides and moves (for example, refer patent document 1).

  Also, a wire electric discharge machine is known that includes a wire electrode recovery mechanism in which a pair of winding rollers for winding a wire electrode is opened and closed. The wire electric discharge machining apparatus includes a guide pipe connected to a pipe block provided in the guide block and a pair of pinch rollers downstream of the guide pipe in order to collect the wire electrode. One pinch roller is pushed up by a lever, and before the wire recovery switch is turned on, one pinch roller pressed against the other pinch roller by the force of the spring separates from the other pinch roller, and then the motor The pump is activated by driving, and water is ejected from the guide pipe through the liquid introduction path provided in the guide block, and at the same time, the wire electrode is collected in the collection box (for example, see Patent Document 2).

  In addition, as the wire electrical discharge machine demanded high accuracy, the wire electrode became thinner, but the ultrafine wire has low springiness, so it can be operated by winding it around the feed roller when it gets wet. Some have been developed to prevent this phenomenon from occurring. The wire electric discharge machine randomly accommodates the wire electrode fed from the feeding roller in the box through the wire guiding device. The wire guide device is one in which water is injected from both sides from a pressure pump, and the wire electrode is discharged into the box together with water from a groove in the guide. Since the wire electrode is stably discharged without being wound around the feed roller and stored in the box, the movable time of the wire electric discharge machine can be lengthened (for example, see Patent Document 3).

  Conventionally, a wire electric discharge machine provided with an automatic wire feeding device is known. The automatic wire feeder is designed so that the wire can be smoothly fed through the lower head, the guide roller, and the wire guide pipe even if the wire electrode is composed of an extremely fine wire having a small wire diameter. The wire is sucked together with water and air by a suction device provided in the wake of the winding roller with the wire passage sealed, and the wire is smoothly fed into the winding roller and clamped, and the wire is supplied smoothly during processing. As described above, the suction device can be operated during processing to prevent adhesion to the wall surface or entanglement of the wire. In particular, the automatic wire feeding device is provided with a suction device on the wire feeding side of the winding roller to suck the wire fed from the winding roller (see, for example, Patent Document 4).

There is also known a liquid draining nozzle that removes liquid adhering to the surface of a linear member or rod-like member by gas injection. The liquid draining nozzle forms an annular gap between the outer wall and the inner wall, and is opened so that the gap follows a predetermined plane perpendicular to the central axis. The liquid draining nozzle has a gas outlet for ejecting gas from the opening, and an inner cavity formed so that a member to be drained can be passed inside the inner wall, and an outer peripheral surface end of the inner wall is It is comprised so that it may protrude in a gas ejection direction rather than the inner peripheral surface end of an outer side wall (for example, refer patent document 5).
WO99 / 32252 (refer to page 1, Fig. 1) Japanese Patent Laid-Open No. 64-20929 (see pages 1, 4 and 2) Japanese Utility Model Publication No.5-2830 JP 2004-17187 A Japanese Patent No. 3399903

  By the way, with respect to a recent wire electric discharge machine, in a machining field in which a workpiece is machined using a wire electrode, in particular, in a fine machining field, a wire electrode having a fine wire of φ0.1 or less, for example, φ0.07, φ0.05, φ0. Many use thin wire electrodes, such as 0.03 and φ0.02. However, when a thin wire is used as the wire electrode for machining the work, the fine wire is weak, that is, the spring force is weak, so the path of the thin wire is bent in the drain direction by the water flow at the draining part, or the wall surface of the feed pipe, etc. The wire cannot reach the take-up roller due to being attached to or entangled with the wire, the wire is wound around the peripheral surface of the take-up roller, or is attached to the wall surface of the wire hopper provided on the outlet side of the take-up roller. Alternatively, a phenomenon has occurred in which the wire cannot be collected smoothly by entering into the gap between the members. For this reason, with conventional wire electric discharge machines, there has been a state where wire electric discharge machining cannot be started or electric discharge machining cannot be continued due to troubles in feeding wire electrodes. In particular, if the wire diameter of the wire electrode becomes an ultrathin wire of 0.05 mm or less, the wire electrode cannot be caught by the take-up roller, and the wire electrode is allowed to flow along with water or on the inlet side of the take-up roller. The phenomenon of staying in the vicinity or entering the gap appeared, and the wire electrode was disconnected or the wire electrode could not be fed.

  In addition, in the case of a wire electric discharge machine, if the draining part provided in the feed pipe is eliminated in order to solve the above problems, the wire feed can be achieved almost reliably, but it adheres to the take-up roller when machining the workpiece. As a result, the wire electrode gets entangled with the take-up roller or nearby equipment, and the electric discharge machining cannot be stopped or the electric discharge machining cannot be continued due to the trouble of feeding the wire electrode.

  An object of the present invention is to solve the above-described problem. Even if a very thin wire electrode having a small wire diameter is used, the wire electrode consumed by the electric discharge machining is passed through the lower head, the guide roller, and the feed pipe. The wire electrode is sucked together with water and air by the ejector provided downstream of the winding roller, and the wire electrode is smoothly fed to the winding roller and securely clamped by the winding roller. An object of the present invention is to provide a wire electric discharge machine capable of smoothly supplying and collecting wire electrodes at the time of supply and processing and preventing the wire electrodes from adhering to the wall surface of the device and tangling the wire electrodes.

The present invention relates to an upper head that feeds a wire electrode into a processing region of a workpiece, a lower head that is disposed to face the upper head and that passes through the wire electrode after processing the workpiece, and that passes through the lower head A guide roller for guiding the wire electrode; a feed pipe for feeding the wire electrode guided by the guide roller; and a pair of winding rollers for pulling out and discarding the wire electrode sent from the feed pipe In wire electric discharge machine,
The feed pipe is composed of the guide fixing pipe having a connection to and draining portion to the roller and the extendable telescopic pipe connected to the fixed pipe,
The telescopic pipe is composed of a first pipe connected to the fixed pipe and a second pipe detachably fitted to the first pipe ,
The fixed pipe has an inlet end located close to the guide roller, and an outlet end provided with the draining portion, and the first pipe is movable between the inlet and the outlet of the draining portion. The second pipe is disposed so as to be movable between a position close to the winding roller and a position where the winding pipe is inserted between the separated states of the winding roller. It relates to a wire electric discharge machine.

  In the wire electric discharge machine, when the workpiece is machined or stopped, the inlet end of the first pipe moves to the outlet of the draining portion, and the outlet end of the second pipe approaches the winding roller. To move to the specified position.

  This wire electric discharge machine is provided with a water flow nozzle in the vicinity of the guide roller, and at the time of processing the workpiece, the water flow ejected from the water flow nozzle passes through the fixed pipe from the tangential direction of the lower surface of the guide roller. The wire electrode is guided from the guide roller to the fixed pipe, and the wire electrode passes from the fixed pipe through the telescopic pipe by the winding roller. Pulled out, communicated with an ejector provided downstream of the take-up roller, and discharged from the ejector.

  In this wire electric discharge machine, when supplying the wire electrode before processing the workpiece, the inlet end of the first pipe moves to the inlet of the draining portion, and the outlet end of the second pipe is The water flow ejected from the water flow nozzle passes through the feed pipe from the lower surface tangential direction of the guide roller, and is connected to an ejector provided downstream of the wind roller through the spaced state of the wind roller. And is ejected from the ejector provided downstream of the take-up roller, and the wire electrode is guided along the guide roller to be guided to the fixed pipe, and the wire electrode is guided from the fixed pipe to the fixed pipe. It is discharged from the ejector through the telescopic pipe.

  The wire electric discharge machine moves the inlet end portion of the first pipe to the outlet of the draining portion when the supply of the wire electrode is achieved while the wire electrode is discharged from the ejector, and the fixing The water flow that has passed through the pipe is discharged from the draining portion.

  In this wire electric discharge machine, the telescopic pipe is movably supported by a cylinder device, the cylinder device moves a first air drive device that moves the first pipe, and a second air drive device moves the second pipe. The first pipe and the second pipe move independently of each other.

  In this wire electric discharge machine, an ejector is provided downstream of the winding roller, and the ejector drains water and advances the wire electrode in the discharging direction at least when the wire electrode is supplied.

  Since this wire electric discharge machine is configured as described above, the wire electrode is smoothly inserted from the feed pipe into the take-up roller even if the wire electrode is a very thin wire having a small wire diameter. The wire electrode can be sucked together with water and air in the feed pipe by the ejector downstream, the wire electrode can be held between the take-up rollers, and the ejector can be moved during the processing of the workpiece by the wire electrode. Operates and reliably discharges the wire electrode together with the water into the wire hopper, and the wire electrode does not stick to or become entangled with various equipment walls and rollers, improving the automatic supply probability of the wire electrode. , Wire breakage due to tangling of wire electrode does not occur during processing. In addition, this wire electric discharge machine is always operated not only when the wire is supplied but also during the processing of the workpiece by the wire electrode by the ejector, and the wire electrode is smoothly discharged to the wire hopper. Even if the back guide roller or feed pipe breaks, the wire electrode can always be smoothly guided to the wire hopper.

  Embodiments of a wire electric discharge machine according to the present invention will be described below with reference to the drawings. This wire electric discharge machine has the same function as the conventional immersion type automatic wire feeder shown in FIG. 7 except for the configuration in the vicinity of the guide roller, feed pipe and take-up roller. Components having the same functions as those of the supply device will be described with the same reference numerals.

  As shown in FIG. 1, this wire electric discharge machine supplies a fine wire electrode 1 such as φ0.07, φ0.05, φ0.03, and φ0.02 to the machining area of the workpiece 2. In order to guide the wire electrode 1 which is provided on the lower arm 6 so as to face the lower side of the head 5 and the upper head 5 and is fed from the lower head 5 and the lower head 5 through which the wire electrode 1 after machining the workpiece 2 passes, A pair of guide rollers 7 provided below the lower head 5, a feed pipe 10 provided for feeding the wire electrode 1 from the guide roller 7, and a wire electrode 1 provided close to the outlet 31 of the feed pipe 10. And a suction device such as an ejector 21 provided downstream of the take-up roller 17. In this wire electric discharge machine, in particular, the feed pipe 10 is composed of a fixed pipe 11 connected to the guide roller 7 and provided with a draining portion 20 and an expandable / contractible pipe 12 connected to the fixed pipe 11. The pipe 12 is composed of a first pipe 13 connected to the fixed pipe 11 and a second pipe 14 fitted to the first pipe 13 so as to be detachable. The drainer 20 is provided with a drain 28 at the bottom and an air communication port 42 at the top.

  In this wire electric discharge machine, as shown in FIGS. 2 and 4, the telescopic pipe 12 is movably supported by a cylinder device 32, and the cylinder device 32 moves the first pipe 13. Drive device) and an air drive device 23 (second air drive device) for moving the second pipe 14, and the first pipe 13 and the second pipe 14 are driven to move independently of each other. The As shown in FIG. 4, the cylinder device 32 is positioned on the side of the fixed pipe 11 to support the first pipe 13 slidably and to support the first pipe 13 slidably. And a support block 52 positioned on the take-up roller 17 side for slidably supporting the second pipe 14. The support block 50 is formed with an air through hole 33 for the first pipe 13 and an air through hole 40 for the second pipe 14. The support block 51 is formed with an air through hole 34 for the first pipe 13, and the support block 52 is formed with an air through hole 41 for the second pipe 14. The cylinder device 32 has a first cylinder 53 fixed across the support block 50 and the support block 51, and a second cylinder 54 fixed across the support block 50 and the support block 52. is doing. In the cylinder device 32, a piston 48 fixed to the outer periphery of the first pipe 13 is slidably disposed in an annular space formed by the first pipe 13 and the first cylinder 53, and the second pipe 14. And a piston 49 fixed to the outer periphery of the second pipe 14 is slidably disposed in an annular space formed by the second cylinder 54.

  In this wire electric discharge machine, since the air driving devices 22 and 23 are configured as described above, the air driving device 22 blows compressed air through the air through hole 33 for the first pipe 13 to draw the piston 48. 5, the inlet end 30 of the first pipe 13 moves to the inlet 26 of the draining portion 20, and compressed air is blown through the air passage hole 34 for the first pipe 13 to piston 48. Is moved to the right side of FIG. 6, the first pipe 13 is driven so that the inlet end 30 thereof moves to the outlet 27 of the draining portion 20. Further, when the air driving device 23 blows compressed air through the air passage hole 41 for the second pipe 14 and moves the piston 49 to the left side of FIG. 4, the outlet end 31 of the second pipe 14 is wound up. If the piston 17 is moved to the right side of the figure by blowing compressed air through the air passage hole 40 for the second pipe 14 and moving to the upstream side of the roller 17, the outlet end 31 of the second pipe 14 is It is driven to move to a state in which it is inserted between the open winding rollers 17 in the spaced state and connected to the ejector 21. The ejector 21 enables the wire electrode 1 to be held, that is, smoothly feeds, removes water adhering to devices such as the winding roller 17, and the wire electrode 1 adheres to a wet device. Can be prevented.

  In this wire electric discharge machine, the fixed pipe 11 has an inlet end 24 positioned close to the guide roller 7, and a drainer 20 is provided at the outlet end 25. The first pipe 13 is disposed so as to be movable between the inlet 26 and the outlet 27 of the draining portion 20, and the second pipe 14 is located near the winding roller 17 and the winding roller 17. It arrange | positions so that a movement between the positions which penetrated between the separation states is possible. The pair of winding rollers 17 is, for example, a mechanism similar to the conventional one, that is, one winding, in order to bring the second pipe 14 into the separated state or the adjacent state sandwiching the wire electrode 1. The roller 17 can be achieved by using a link mechanism or a lever mechanism. This wire electric discharge machine is provided with a water flow nozzle 16 in the vicinity of the guide roller 7. In this wire electric discharge machine, an ejector 21 is provided downstream of the winding roller 17, and the ejector 21 drains water and advances the wire electrode 1 in the discharging direction at least when the wire is supplied before processing the workpiece 2. Let As shown in FIG. 3, the ejector 21 is attached to the machine base 15 by a nozzle holder 45, and a nozzle guide 44 having an air supply port 47 is attached to the nozzle holder 45. A suction nozzle 43 is set in the nozzle guide 44. The compressed air blown from the air supply port 47 is guided between the nozzle guide 44 and the suction nozzle 43 and is ejected rearward along the inner wall surface of the suction nozzle 43. At this time, the second pipe of the expansion pipe 12 is used. The wire electrode 1 guided and fed by 14 is sucked and discharged.

  When the workpiece 2 is machined or stopped, the wire electric discharge machine moves the inlet end 30 of the first pipe 13 to the outlet 27 of the draining portion 20 as shown in FIG. The outlet end 31 is driven so as to move to a position close to the winding roller 17. At the time of processing the workpiece 2, the water flow ejected from the water flow nozzle 16 is discharged from the draining portion 20 through the fixed pipe 11 from the tangential direction of the lower surface of the guide roller 7, and the wire electrode 1 is caused to travel along with the guide roller 7. The wire electrode 1 is fed from the fixed pipe 11 through the telescopic pipe 12 to the take-up roller 17 and pulled out by the take-up roller 17 and provided in the downstream of the take-up roller 17. 21 is discharged from the ejector 21 to the outside such as a waste wire hopper.

  In the wire electric discharge machine, when the wire electrode 1 is supplied before the workpiece is processed, the inlet end 30 of the first pipe 13 moves to the inlet 26 of the drainer 20 as shown in FIG. The 14 outlet end portions 31 are connected so as to pass through the spaced state of the pair of winding rollers 17 and communicate with an ejector 21 provided downstream of the winding rollers 17.

  When the supply of the wire electrode 1 is achieved in a state where the wire electrode 1 is discharged from the ejector 21, the wire electric discharge machine moves the inlet end 30 of the first pipe 13 to the draining portion 20 as shown in FIG. It moves to the exit 27, and the water flow which passed through the fixed pipe 11 is discharged from the draining part 20. Next, as shown in FIG. 1, the second pipe 14 is moved to the first pipe 13 side, the outlet end portion 31 of the second pipe 14 is positioned on the upstream side of the winding roller 17, and then the winding roller 17 Are placed close to each other and the wire electrode 1 is sandwiched and set in a processable state.

  In this wire electric discharge machine, when the wire electrode 1 is supplied before the workpiece 2 is machined, the water flow ejected from the water flow nozzle 16 passes through the feed pipe 10 from the tangential direction of the lower surface of the guide roller 7 to the winding roller 17. It is discharged from the ejector 21 provided in the downstream, and the wire electrode 1 is moved along with the guide roller 7 to be guided to the fixed pipe 11, and the wire electrode 1 passes from the fixed pipe 11 through the telescopic pipe 12 to the ejector 21. Discharged from.

  This wire electric discharge machine is configured as described above, and one of the first pipes 13 of the telescopic pipe 12 extends to the end face of the inlet 26 of the draining portion 20 by driving of the air driving device 22 at the time of wire supply. Is connected to the outlet end 25 of the fixed pipe 11, and the other second pipe 14 extends between the winding roller 17 opened by the drive of the air driving device 23 and immediately before the ejector 21 of the suction device. By the feed pipe 10 comprising the fixed pipe 11, the first pipe 13 and the second pipe 14 connected to the guide roller 7 installed below the lower head 5, the entire space between the lower surface of the guide roller 7 and the ejector 21 is obtained. Are connected by a single pipe. Therefore, even if the wire electrode 1 of the ultrafine wire is used in this wire electric discharge machine, the wire electrode 1 fed out from the lower head 5 is guided by the guide roller 7 by the water flow from the water flow nozzle 16 and is elongated by one. The ejector 21 is surely and smoothly fed through the feed pipe 10. After the wire electrode 1 that has been fed reaches the ejector 21, the feeding of the water flow from the water flow nozzle 16 is stopped, the ejector 21 is operated, and a thrust for holding the wire electrode 1 is applied to the ejector 21. Thereafter, the air driving device 22 is driven to cause the first pipe 13 to contract and move toward the outlet 27 side of the draining portion 20, and the water adhering from the draining portion 20 to the ejector 21 is utilized by the thrust of the ejector 21. The wire electrode 1 is removed while being held. Next, the air driving device 23 is driven to cause the second pipe 14 to contract and move to the front of the take-up roller 17, whereupon the take-up roller 17 is closed from the opened state to the pinched state of the wire electrode 1, and the take-up roller 17 Then, the winding of the wire electrode 1 is confirmed, and then the operation of the ejector 21 is stopped, or the operation of the ejector 21 is continued, and the wire electrode 1 is fed and the electric discharge machining of the wire electrode 1 to the workpiece 2 is started. When the workpiece 2 is processed by the wire electrode 1, the water flowing from the water nozzle 16 of the lower head 5 to the fixed pipe 11 is collected by the drainer 20 and collected by the filtration device or the like through the drain 28. In this state, the feed pipe Since the water is already removed from the telescopic pipe 12 in FIG. 10, the wire electrode 1 is prevented from adhering to or entangled with the take-up roller 17 and the equipment in the vicinity thereof, and the electric discharge machining for the workpiece 2 proceeds smoothly. Will do.

  The wire electric discharge machine according to the present invention is generated by, for example, immersing a workpiece in a machining fluid supplied to a machining tank or injecting a machining fluid onto the workpiece and applying an interelectrode voltage between the wire electrode and the workpiece. It is preferable for use in a wire electric discharge machine that processes a workpiece with electric discharge energy.

It is explanatory drawing which shows the Example of the wire electric discharge machine by this invention, and shows the state of the expansion-contraction pipe at the time of a process or a stop. It is a front view explaining the relationship between the expansion-contraction pipe and the winding roller in the wire electric discharge machine of FIG. It is explanatory drawing which shows the relationship between the expansion-contraction pipe of FIG. 2, and a winding roller. It is sectional drawing which shows the air drive device of the expansion-contraction pipe in the wire electric discharge machine of a figure. It is explanatory drawing which shows the Example of the wire electric discharge machine by this invention, and shows the state of the expansion-contraction pipe at the time of wire supply. It is explanatory drawing which shows the Example of the wire electric discharge machine by this invention, and shows the state of the expansion-contraction pipe at the time of draining in a draining part. It is the schematic which shows an example of the wire electric discharge machine provided with the conventional draining part. It is the schematic which shows an example of the conventional wire electric discharge machine.

DESCRIPTION OF SYMBOLS 1 Wire electrode 2 Work 4 Upper head 5 Lower head 7 Guide roller 10 Feed pipe 11 Fixed pipe 12 Telescopic pipe 13 1st pipe 14 2nd pipe 16 Water flow nozzle 17 Winding roller 20 Draining part 21 Ejector 22 Air drive device (1st Air drive device)
23 Air Drive Device (Second Air Drive Device)
24, 30 Inlet end 25, 31 Outlet end 26 Inlet 27 Outlet 32 Cylinder device

Claims (7)

An upper head that feeds the wire electrode to the processing area of the workpiece, a lower head that is disposed to face the upper head and passes the wire electrode after processing the workpiece, and guides the wire electrode that has passed through the lower head Wire discharge machine having a guide roller for carrying out, a feed pipe for feeding out the wire electrode guided by the guide roller, and a pair of winding rollers for drawing out and discarding the wire electrode fed out from the feed pipe In
The feed pipe is composed of a fixed pipe connected to the guide roller and provided with a draining portion and an extendable / contractible pipe connected to the fixed pipe,
The telescopic pipe is composed of a first pipe connected to the fixed pipe and a second pipe detachably fitted to the first pipe ,
The fixed pipe has an inlet end located close to the guide roller, and an outlet end provided with the draining portion, and the first pipe is movable between the inlet and the outlet of the draining portion. The second pipe is disposed so as to be movable between a position close to the winding roller and a position where the winding pipe is inserted between the separated states of the winding roller. Wire electric discharge machine. When the workpiece is processed or stopped, the inlet end of the first pipe moves to the outlet of the draining portion, and the outlet end of the second pipe moves to a position close to the winding roller. The wire electric discharge machine according to claim 1 , wherein A water flow nozzle is provided in the vicinity of the guide roller, and when the workpiece is processed, the water flow ejected from the water flow nozzle is discharged from the draining portion through the fixed pipe from the tangential direction of the lower surface of the guide roller. The wire electrode is guided from the guide roller to the fixed pipe and guided to the fixed pipe, and the wire electrode is drawn from the fixed pipe through the telescopic pipe by the winding roller. The wire electric discharge machine according to claim 2 , wherein the wire electric discharge machine is connected to an ejector provided downstream and discharged from the ejector. At the time of supplying the wire electrode before processing the workpiece, the inlet end of the first pipe moves to the inlet of the draining portion, and the outlet end of the second pipe is spaced from the take-up roller. The water flow ejected from the water flow nozzle is passed through the feed pipe from the lower surface tangent direction of the guide roller, and is connected to an ejector provided downstream of the wind roller. The wire electrode is discharged from the ejector provided in the wake and is guided along the guide roller to guide to the fixed pipe. The wire electrode passes from the fixed pipe through the telescopic pipe to the ejector. The wire electric discharge machine according to claim 1 , wherein the wire electric discharge machine is discharged from the machine. When the supply of the wire electrode is achieved in a state where the wire electrode is discharged from the ejector, the inlet end of the first pipe is moved to the outlet of the draining portion, and the water flow through the fixed pipe is moved. The wire electric discharge machine according to claim 4 , wherein the wire electric discharge machine is discharged from the draining portion. The telescopic pipe is movably supported by a cylinder device, and the cylinder device includes a first air driving device for moving the first pipe and a second air driving device for moving the second pipe, The wire electric discharge machine according to any one of claims 1 to 5 , wherein the first pipe and the second pipe move independently from each other. Ejector is provided on the downstream of the take-up roller, said ejector, when the supply of at least the wire electrode, any of claim 1 to 6, characterized in that to proceed the wire electrode to the discharge direction performs draining The wire electric discharge machine of Claim 1.

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