WO2009157205A1 - ワイヤ放電加工装置の自動ワイヤ挿通装置 - Google Patents

ワイヤ放電加工装置の自動ワイヤ挿通装置 Download PDF

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Publication number
WO2009157205A1
WO2009157205A1 PCT/JP2009/002930 JP2009002930W WO2009157205A1 WO 2009157205 A1 WO2009157205 A1 WO 2009157205A1 JP 2009002930 W JP2009002930 W JP 2009002930W WO 2009157205 A1 WO2009157205 A1 WO 2009157205A1
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WIPO (PCT)
Prior art keywords
jet nozzle
nozzle
divided
jet
opening
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Application number
PCT/JP2009/002930
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English (en)
French (fr)
Japanese (ja)
Inventor
保坂昭夫
Original Assignee
株式会社ソディック
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Publication date
Application filed by 株式会社ソディック filed Critical 株式会社ソディック
Priority to CN2009801106301A priority Critical patent/CN101980815B/zh
Publication of WO2009157205A1 publication Critical patent/WO2009157205A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/02—Wire-cutting
    • B23H7/08—Wire electrodes
    • B23H7/10—Supporting, winding or electrical connection of wire-electrode
    • B23H7/102—Automatic wire threading

Definitions

  • the present invention relates to a wire electric discharge machining apparatus for machining a workpiece by generating an electric discharge in a machining gap formed between a wire electrode traveling between a pair of wire guides and the workpiece.
  • the present invention relates to an automatic wire insertion device of a wire electric discharge machining apparatus that automatically stretches a wire electrode between a pair of wire guides.
  • Wire electrical discharge machining equipment with a numerical control device is a device that automatically inserts wire electrodes into the upper wire guide, start hole, and lower wire guide in order and captures them by the take-up roller, so-called automatic wire insertion device (Automatic Wire Threader) It has.
  • the start hole is a hole of about 1 mm formed in the work prior to electric discharge machining.
  • the diameter of the wire electrode is 0.20 mm
  • the wire guide has an insertion hole of ⁇ 0.21 mm.
  • FIG. 7 shows a well-known high-precision wire guide called “round die”.
  • each wire guide is accommodated in a guide assembly.
  • Each guide assembly includes a jet nozzle that supplies a machining liquid toward the machining gap.
  • the jet nozzle typically has an opening of about ⁇ 6 mm.
  • the wire guide is inevitably located farther from the workpiece than the opening of the jet nozzle.
  • an automatic wire insertion device includes a jet nozzle that forms a machining liquid jet (hereinafter referred to as “jet”) coaxially in the wire electrode delivery direction.
  • the jet propels to the lower wire guide while restraining the wire electrode.
  • Patent Document 1 discloses an automatic wire insertion device in which a jet nozzle is provided in a guide assembly coaxially with a jet nozzle.
  • a jet nozzle typically has an opening of ⁇ 1.5 mm.
  • the opening of the jet nozzle is disposed immediately below the upper wire guide. Therefore, there is a considerable distance from the opening of the jet nozzle to the lower wire guide. For this reason, the force that the jet restrains the wire electrode and the propulsion force is reduced, and turbulent flow is likely to occur in the jet. As a result, the probability of the jet inserting the wire electrode through the hole of the lower wire guide is reduced.
  • Patent document 2 is disclosing the automatic wire insertion apparatus provided with the jet nozzle extended below from the upper wire guide.
  • the jet nozzle opening is located as close as possible to the jet nozzle opening. The distance from the jet nozzle to the start hole is short, and the success rate of automatic insertion is improved.
  • the extended jet nozzle greatly restricts the angle at which the wire electrode tilts between the upper and lower wire guides, that is, the taper angle.
  • Patent Documents 3 and 4 disclose an automatic wire insertion device including a jet nozzle that can move up and down.
  • the jet nozzle opening is lowered close to the jet nozzle opening to increase the success rate of wire insertion.
  • the opening of the jet nozzle is raised directly below the upper wire guide so that the jet nozzle does not greatly limit the taper angle.
  • the jet nozzle opening has a much smaller diameter than the jet nozzle, the jet nozzle still limits the taper angle.
  • Patent document 5 is disclosing the automatic wire insertion apparatus provided with the guide pipe which can move up and down along which a wire electrode passes.
  • the wire electrode is inserted into the guide pipe, and the wire electrode is guided to the lower wire guide by a jet supplied to the guide pipe.
  • a typical guide pipe has an outer diameter of 2 mm and an inner diameter of 1 mm.
  • Patent document 5 is disclosing the wire guide which can be divided
  • FIG. 8 shows a typical splittable wire guide called “split dies”. If the upper wire guide is a split die, the opening of the guide pipe can be positioned at the entrance of the start hole. As a result, the success rate of automatic wire insertion increases.
  • split dies are considered less durable and prone to wear. Further, the split die is considered to have a higher positioning error than the round die. In particular, split dies are considered to be inferior in accuracy in processing using wire electrodes inclined between upper and lower wire guides, so-called “taper processing”, compared to round dies.
  • Patent Documents 6, 7 and 8 disclose an automatic wire insertion device having a jet nozzle called a “sub nozzle”.
  • the sub-nozzle is attached to the jet nozzle only during the wire insertion process so as to close the opening of the jet nozzle. Since the sub-nozzle can be normally divided horizontally, the sub-nozzle can be removed from the jet nozzle after the wire electrode is stretched between the upper and lower wire guides.
  • Japanese Patent No. 3406647 Japanese Unexamined Patent Publication No. Sho 63-318219 Japanese Patent Publication No. 5-53567 Japanese Patent Publication No. 6-39013 Japanese Patent Publication No. 7-29246 Japanese Patent Publication No. 5-21693 Japanese Patent Laid-Open No. 2-100824 JP-A-4-269121
  • the “sub nozzle” type automatic wire insertion device requires a jet nozzle attaching / detaching device for automatically attaching / detaching the jet nozzle to / from the jet nozzle at the time of wire insertion.
  • the jet nozzle attaching / detaching device the divided nozzles must be accurately combined and firmly and liquid-tightly connected to the jet nozzle. Further, since high-pressure water is supplied to the small-diameter jet nozzle via the jet nozzle, the load applied to the joint portion between the jet nozzle and the jet nozzle is large.
  • the main object of the present invention is to provide an automatic wire insertion device capable of automatically and reliably mounting a jet nozzle to a jet nozzle with a relatively simple configuration and operation.
  • the jet nozzle (20) composed of the first and second divided nozzles (91, 92) is mounted on the jet nozzle so as to close the opening of the jet nozzle (46).
  • the present invention relates to an automatic wire insertion device (1) of a wire electric discharge machining apparatus in which a wire electrode is guided.
  • the automatic wire insertion device (1) includes a first finger (61) that supports the first divided nozzle (91), a second finger (62) that supports the second divided nozzle (92), The first and second fingers (61, 62) are opened and closed to combine or divide the first and second divided nozzles (91, 92), and at the same time, the jet nozzle (20) and the jet nozzle (46) are combined or And a switchgear (70) to be separated.
  • the annular groove (25) is formed on one of the inner peripheral surface (24) of the jet nozzle and the outer peripheral surface (44) of the jet nozzle, and is fitted into the annular groove (25).
  • An annular protrusion (48) is formed on the other of the inner peripheral surface (24) of the jet nozzle and the outer peripheral surface (44) of the jet nozzle.
  • the first divided nozzle (91) has a first divided surface (23U, 23B)
  • the second divided nozzle (92) has a second divided surface (23U, 23B)
  • a valley A groove (27) is formed on the first dividing surface, and a chevron (26) that fits into the valley groove is formed on the second dividing surface.
  • the automatic wire insertion device further includes a moving device that swings the jet nozzle between the back of the automatic wire insertion device and directly below the opening of the jet nozzle.
  • the jet nozzle Since the jet nozzle is mounted on the lower side of the jet nozzle, a downward force is applied to the jet nozzle in the direction in which the jet nozzle is detached from the jet nozzle due to the internal pressure of the high-pressure water.
  • high-pressure water is supplied from a jet nozzle having a large inner diameter to a jet nozzle having a small inner diameter, the high-pressure water introduced into the jet nozzle is radially expanded in the radial direction of the jet nozzle from the inside. Load.
  • the annular protrusion is fitted into the annular groove in the radial direction of the jet nozzle, so that the annular groove is pressed downward against the fitting protrusion by the pressure of high-pressure water and is brought into close contact.
  • the jet nozzle is fixed to the jet nozzle, the jet nozzle is hardly separated from the jet nozzle, and high-pressure water does not leak out.
  • the joint part of the jet nozzle and the jet nozzle can be composed only of the annular protrusion and the annular groove, the structure of the joint part is simple and durable, the jet nozzle and the jet nozzle are not likely to break, and safe Improves. Further, since the joint portion is sealed with the pressure of high-pressure water, a component such as a seal member is not necessarily required, and the production cost of the jet nozzle is reduced. And since there are few component parts which are easy to deteriorate over time with a comparatively simple structure, the durability and liquid-tightness of the connection part are not immediately lost, and safety is improved.
  • the automatic wire insertion device of the present invention has a configuration in which the gap between the annular protrusion and the annular groove is tightly sealed by the pressure of high-pressure water, play can be provided between the annular protrusion and the annular groove. Even if there is a misalignment between each divided nozzle of the jet nozzle and the jet nozzle, the possibility that the jet nozzle cannot be coupled to the jet nozzle is small. Therefore, the jet nozzle and the jet nozzle do not require higher precision than necessary.
  • each divided nozzle can be coupled to the jet nozzle from the direction orthogonal to the divided surface.
  • the nozzles can be combined with the jet nozzle simultaneously with the combination of the divided nozzles.
  • the method of coupling by fitting can make the configuration of the automatic wire insertion device and the control device easier than the method of coupling by engagement, screwing, and fixing member, and the manufacturing cost is reduced.
  • the operation of attaching / detaching the jet nozzle is relatively simple and the number of processes is reduced, the attachment / detachment time of the jet nozzle is shortened, and an excessive time is not required for automatic wire insertion.
  • the split nozzles are combined by fitting the chevron projections and the valley grooves in a direction perpendicular to the radial direction of the jet nozzle, the internal pressure of the high-pressure water is applied radially in the radial direction of the jet nozzle.
  • the chevron is pressed against the trough in the radial direction, and the gap between the chevron and the trough is closed. Therefore, leakage of high-pressure water from between the divided nozzles is reliably prevented with a simple configuration.
  • the automatic wire insertion device of the present invention since the operation of connecting the jet nozzle and the jet nozzle is simple, it is possible to greatly shorten the time for attaching and detaching the jet nozzle. In addition, since there is play between the annular protrusion and the annular groove, the coupling between the jet nozzle and the jet nozzle is not failed, and the workability is improved. Further, since the coupling portion is composed only of the annular protrusion and the annular groove, the structure is simple and durable, and there is no risk of damage to the component parts. As a result, the working efficiency and safety are improved.
  • the automatic wire insertion device of the present invention it is possible to provide play between the annular protrusion and the annular groove, and the production of the jet nozzle is not particularly difficult.
  • the configuration and operation for coupling the jet nozzle and the jet nozzle are simple, the configurations of the automatic wire insertion device and the control device can be simplified.
  • a high-quality optical component and a moving device that can perform high-precision positioning are unnecessary. As a result, no excessive cost is required for manufacturing the automatic wire insertion device.
  • the automatic wire insertion device has a moving device that swings the jet nozzle between the back of the automatic wire insertion device and directly below the opening of the jet nozzle, the jet nozzle is moved from the retracted position to the mounting position in one stroke. Therefore, the operation when attaching / detaching the jet nozzle is simpler and the number of processes is reduced, the attachment / detachment time of the jet nozzle is shortened, and the time required for automatic wire insertion can be further shortened. Therefore, there is an effect that the working efficiency is further improved.
  • each divided nozzle of the jet nozzle can be simultaneously moved in opposite directions by one operation.
  • the division nozzles can be smoothly combined in a short time with a relatively simple configuration. Further, the positional deviation between the divided nozzles and between each divided nozzle and the jet nozzle is reduced. Therefore, there is an effect that the working efficiency is further improved.
  • a semi-circular cutout is formed at the rear end of each finger, and the arm opens and closes when the cylindrical member rotates to contact the edge of the cutout and rotate the finger.
  • the fingers can be simultaneously swung in opposite directions by the linear reciprocating motion of the driving device of the apparatus so as to be opened and closed, and the united jet nozzle can be held. Therefore, even if the driving force of the opening / closing device driving device that holds the divided nozzles against each other is small, separation of each divided nozzle can be prevented, and the driving device of the opening / closing device is downsized to make the jet nozzle attaching / detaching device compact. In addition, the manufacturing cost is further reduced and the safety is improved.
  • FIG. 2 is a left side sectional view showing a jet nozzle and a jet nozzle in FIG. 1. It is a left view which shows the jet nozzle attachment / detachment apparatus of the automatic wire insertion apparatus of this invention. It is the perspective view seen from the back side of the main body which shows the jet nozzle attachment / detachment apparatus in FIG. It is a perspective view which shows the jet nozzle attachment / detachment apparatus with which the division
  • the automatic wire insertion device of the present invention will be described with reference to FIGS.
  • the jet nozzle attaching / detaching device is omitted from the automatic wire inserting device in FIG.
  • the main body 10 of the automatic wire insertion device 1 is provided on a machining head that moves up and down.
  • a jet nozzle attaching / detaching device 90 for attaching / detaching the jet nozzle 20 to / from the jet nozzle 46 is provided in the main body 10.
  • An upper guide assembly 30 is fixed to the lower end of the main body 10. The height of the upper guide assembly 30 can be adjusted by moving the processing head up and down and moving the main body 10 up and down.
  • the upper guide assembly 30 is provided with a jet nozzle 46 at its lower end that forms a water column coaxially with the feeding direction of the wire electrode 2.
  • the machining gap formed between the wire electrode 2 and the workpiece 3 is surrounded by this water column during machining.
  • the opening of the jet nozzle 46 is directed to the workpiece 3.
  • the wire electrode 2 is fed out from the wire bobbin 44 by the tension roller 42.
  • the tension roller 42 feeds the wire electrode 2 while applying a required tension to the wire electrode 2 in cooperation with the winding roller 56 during processing.
  • the wire electrode 2 is inserted into the upper wire guide and the start hole provided in the upper guide assembly 30 by the automatic wire insertion device 1.
  • the wire electrode 2 inserted into the start hole is guided to a pipe jet type conveying device 54 by a direction changing pulley 52 through a lower wire guide (not shown) provided in the lower guide assembly 50.
  • the conveyance device 54 conveys the wire electrode 2 to the take-up roller 56 by the water flow in the pipe.
  • the winding roller 56 includes a driving roller and a capstan.
  • a cutting roller having a rotating cutting blade is provided downstream of the winding roller 56.
  • the used wire electrode 2 is shredded into small pieces by a cutting roller and discharged to the bucket 58.
  • the automatic wire insertion device 1 includes a guide pipe 12, a jet supply unit 14 that supplies a jet to the guide pipe 12, a delivery roller 16, a cutter 18, and a jet nozzle 20. Further, the automatic wire insertion device 1 includes an elevating device that moves the guide pipe 12 up and down in the direction in which the wire electrode 2 is sent out.
  • the cutter 18 can be replaced with an energizing / cutting device that locally supplies a large current to the wire electrode 2 and cuts it.
  • the automatic wire insertion device 1 can be provided with an annealing device (not shown) for annealing the wire electrode 2.
  • the annealed wire electrode 2 is imparted with straightness and becomes difficult to buckle.
  • the opening of the guide pipe 12 can be lowered to the position just above the upper wire guide by the lifting device.
  • the guide pipe 12 guides the wire electrode 2 to the upper wire guide so that the wire electrode 2 is not buckled by the jet supplied from the jet supply unit 14, and the wire electrode 2 is inserted into the upper wire guide.
  • the opening of the guide pipe 12 is positioned higher than the cutter 18.
  • the automatic wire insertion device 1 of the present invention includes a jet nozzle 20 attached to the jet nozzle 46 so as to close the opening of the jet nozzle 46.
  • the wire electrode 2 is guided to the lower wire guide by the jet supplied from the jet nozzle 20.
  • the guide assembly 30 is fixed to the upper arm 6 provided on the lower end side of the main body 10 of the automatic wire insertion device 1.
  • the upper guide assembly 30 includes a flat plate-shaped upper contact 32, an upper wire guide 31, a jet nozzle 46, and a housing 33.
  • the contact 32 is made of cemented carbide (tungsten carbide) and supplies power to the wire electrode 2.
  • the contact 32 is slidable horizontally so that the guide pipe 12 can be lowered to just above the upper wire guide 31.
  • the upper wire guide 31 is a partially round diamond die and positions the wire electrode 2. Round dies have relatively high positioning accuracy, and are particularly excellent in taper machining.
  • the upper and lower wire guides are provided as close as possible to the workpiece 3 in order to improve positioning accuracy and secure a larger taper angle.
  • the opening of the jet nozzle 46 is downward.
  • the jet nozzle 46 is fixed to the lower end of the housing 33 by screwing.
  • a chamber 47 is formed by the jet nozzle 46 and the housing 33.
  • the jet nozzle 20 includes a small-diameter jet nozzle body 21 and a large-diameter outer frame 23.
  • a chamber 22 is formed by the jet nozzle 20 and the jet nozzle 46.
  • the jet direction 1A is coaxial with the delivery direction of the wire electrode 2 and is generally downward.
  • annular protrusion 48 is formed over the vertical outer peripheral surface 44 of the jet nozzle 46.
  • An annular groove 25 complementary to the annular protrusion 48 in the shape is formed in the vertical inner peripheral surface 24 of the outer frame 23.
  • the jet nozzle 20 is coupled to the jet nozzle 46 by fitting the annular protrusion 48 into the annular groove 25.
  • the vertical inner peripheral surface 24 of the outer frame 23 and the vertical outer peripheral surface 44 of the jet nozzle 46 are in close contact with each other.
  • An annular protrusion may be formed on the vertical inner peripheral surface 24 of the outer frame 23, and an annular groove may be formed on the vertical outer peripheral surface 44 of the jet nozzle 46.
  • a play (clearance) is provided between the annular protrusion 48 and the annular groove 25.
  • the annular protrusion 48 is triangular or trapezoidal in cross section, and has an inclined surface, and the cross section in which the annular groove 25 is fitted to the annular protrusion 48 is triangular or trapezoidal.
  • the shape has an inclined surface. For this reason, the annular groove 25 is guided and fitted to the inclined surface of the annular protrusion 48, so that even if there is no clearance between the annular protrusion 48 and the annular groove 25, the positional deviation between the jet nozzle 20 and the jet nozzle 46 is shifted. Absorbed.
  • the high-pressure water is supplied to the chamber 22 along the direction 1B in the chamber 47 and further supplied to the jet nozzle body 21.
  • the direction 1B in which the high-pressure water is supplied is the same downward direction as the jet direction 1A.
  • the annular groove 25 is pressed downward against the annular protrusion 28 by the downward force of the high pressure water. In this way, the jet nozzle 20 is reliably coupled to the jet nozzle 46 by the high-pressure water, and the opening of the jet nozzle 46 is reliably sealed.
  • the jet nozzle 20 is equally divided into right and left as viewed from the front along the jet direction 1A.
  • the right half when viewed from the front of the jet nozzle 20 is the first divided nozzle 91, and the left half is the second divided nozzle 92.
  • the first divided nozzle 91 includes a radial direction 1C of the jet nozzle 20 on an upper divided surface 23U on the upper side of the outer frame corresponding to a portion forming the chamber 22 of the jet nozzle 20 of the outer frame 23 constituting the housing of the jet nozzle 20.
  • the projections 26 or the trough grooves 27 are provided without interruption in parallel to the direction 1A, in other words, along the jet direction 1A.
  • the second divided nozzle includes an angle projection 26 or a valley groove so as to face the angle projection 26 or the valley groove 27 provided on the first division nozzle 91 on the upper division surface 23U on the upper side of the outer frame.
  • a trough-shaped groove 27 or a mountain-shaped protrusion 28 having a shape to be fitted to the groove 27 is provided without interruption.
  • each of the divided nozzles 91 and 92 has two divided surfaces formed on each outer frame 23, and one of the divided nozzles 91 and 92 has an outer surface centered on an axis coaxial with the jet direction 1A.
  • a chevron 26 is formed in the clockwise direction along the frame 23, and a trough groove 27 is formed in the counterclockwise direction along the outer frame 23 on the other split surface.
  • the internal pressure of the high-pressure water is radially applied to the radial direction 1 ⁇ / b> C of the jet nozzle 20, so that the chevron protrusions 26 are pressed against the trough grooves 27 in the radial direction. 26 and the trough groove 27 are engaged with each other, and a slight gap between the chevron 26 and the trough groove 27 is closed.
  • the positions of the divided nozzle 91 and the divided nozzle 92 do not shift, so that separation is difficult, and the liquid can be sealed between the divided surfaces with the internal pressure of the high-pressure water for more reliable sealing.
  • the chevron 26 has a triangular or trapezoidal cross section and an inclined surface.
  • the trough groove 27 has a shape that fits into the chevron 26.
  • the chevron 26 and the trough groove 27 are in a positional relationship that faces each other so that the divided nozzles 91 and 92 are fitted to each other on the divided surfaces. Since the valley groove 27 is guided and fitted to the inclined surface of the chevron 26, when the divided nozzles 91 and 92 and the jet nozzle 46 are combined, the first divided nozzle 91 and the second divided nozzle 92 Misalignment is absorbed. Therefore, the uniting of the divided nozzles 91 and 92 and the coupling of the divided nozzles 91 and 92 and the jet nozzle 46 are performed smoothly at the same time, so that the jet nozzle 20 can be completely attached to the jet nozzle 46.
  • the jet nozzle 20 uses the pressure of high-pressure water acting in a direction to separate the first divided nozzle 91, the second divided nozzle 92, and the jet nozzle 46 of the jet nozzle 20 from each other. 20 and the jet nozzle 46, and the joint portion is sealed. For this reason, the jet nozzle 20 has both high connectivity, liquid tightness, and ease of coupling with a relatively simple configuration.
  • the first divided nozzle 91 has a radial direction of the jet nozzle 20 on a lower divided surface 23 ⁇ / b> B on the lower side of the outer frame corresponding to a portion where the jet nozzle body 21 of the outer frame 23 is formed.
  • a chevron 26 or a trough 27 is provided without interruption in a direction perpendicular to 1C.
  • the second divided nozzle 92 has a valley-shaped groove 27 or a groove shaped to fit with a mountain-shaped projection 26 or a valley-shaped groove 27 provided on the first divided nozzle 91 on the lower divided surface 23B on the lower side of the outer frame.
  • the chevron 28 is provided without interruption.
  • the chevron 26 and the trough groove 27 are fitted to each other on the upper divided surface 23U on the upper side of the outer frame, so that high connectivity and coupling can be achieved.
  • the jet nozzle 20 shown in FIG. 2 is configured so that the chevron 26 and the trough groove 27 are fitted to each other on the lower divided surface 23B on the lower side of the outer frame.
  • the attachment / detachment device 7 includes a first finger 61, a second finger 62, an opening / closing device 70, and a moving device 80.
  • the first finger 61 supports the first divided nozzle 91
  • the second finger 62 supports the second divided nozzle 92.
  • the opening / closing device 70 opens and closes the fingers 61 and 62.
  • the fingers 61 and 62 and the opening / closing device 70 are provided integrally, and constitute a main unit 90 including the jet nozzle 20.
  • the constituent members of the opening / closing device 70 are visible.
  • a cover that covers the constituent members of the opening / closing device 70 is provided, and the constituent members are fixed to the cover. It is made not to fall off.
  • the moving device 80 swings the jet nozzle 20 together with the opening / closing device 70 in the rotational direction 1D between the retracted position 10A and the mounting position 10B.
  • the retreat position 10A is the back of the main body 10 of the automatic wire insertion device 1 as shown in FIG.
  • the mounting position 10B is directly under the opening of the jet nozzle 46, as shown in FIG. Since the jet nozzle 20 is moved from the retracted position 10A to the mounting position 10B in one stroke, the time required for the wire insertion process is shortened.
  • the moving device 80 includes a swing bracket 81, a driving device 82, and a link mechanism 83.
  • the swing bracket 81 is attached to the main body 10.
  • the driving device 82 swings and reciprocates in the rotational direction 1D by swinging the main body unit 90 like a pendulum around the horizontal X axis with the mounting position 80X of the swing blanket 81 as a fulcrum.
  • the link mechanism 83 converts the linear reciprocating motion of the driving device 82 into the rotational reciprocating motion of the main unit 90 and transmits it.
  • the drive device 82 is a cylinder device such as an air cylinder or a hydraulic cylinder that operates with compressed air supplied from an air source such as a compressor (not shown) or pressurized oil supplied from an oil tank.
  • the drive device 82 is accommodated so that the cylinder cylinder is vertically arranged in a recessed groove portion 10C provided on the back of the main body 10 of the automatic wire insertion device 1 shown in FIG.
  • the retracting position 10A of the main body unit 90 is provided at the back of the main body 10 of the automatic wire insertion device 1, in the movement method using a combination of linear movements, a plurality of strokes are performed to move the jet nozzle from the retracting position 10A to the mounting position 10B. It is necessary to move via. Since the moving device 80 shown in FIG. 4 is configured to be able to swing the jet nozzle 20, the jet nozzle 20 can be positioned from the retracted position 10 ⁇ / b> A to the mounting position 10 ⁇ / b> B in one stroke by following the trajectory of the turning movement. it can. Therefore, the main body unit 90 can be accommodated in a position where it does not become an obstacle to work or processing without giving a significant loss to the time required for automatic wire insertion.
  • the position where the jet nozzle 20 is attached is the front side (front part) of the main body unit 90 and is the tip portion of the pair of fingers 61 and 62. And let the direction of a front-end
  • the direction perpendicular to the central axis 90C along the jet direction 1A is defined as the vertical direction
  • the direction perpendicular to the central axis 90C and perpendicular to the vertical axis is defined as the horizontal direction
  • the direction 1E to leave is the outside.
  • a plane parallel to the central axis 90C and perpendicular to the longitudinal axis is defined as a mounting plane
  • a plane parallel to the mounting plane and positioned in the jet direction 1A is a lower surface (back surface), and is opposite to the jet direction 1A.
  • the located surface is called the upper surface (surface).
  • the moving device 80 swings the main body unit 90 and arranges the jet nozzle 20 at the attachment position 10A in one stroke.
  • the jet nozzle 20 is mounted with an inclination with respect to the mounting plane of the main unit 90, as shown in FIG. Therefore, although the longitudinal axis of the main unit 90 is not exactly parallel to the jet direction 1A, the longitudinal axis and the jet direction 1A are considered to be parallel.
  • the first finger 61 and the second finger 62 are opened and closed by a so-called double-open double-close method in which the first finger 61 and the second finger 62 move in directions opposite to each other in a direction orthogonal to the divided surfaces of the divided nozzles 91 and 92 of the jet nozzle 20. Specifically, the first finger 61 and the second finger 62 reciprocate around the same fulcrum 65 in a direction opposite to each other around one longitudinal axis parallel to the jet direction 1A.
  • the rear end portions of the first finger 61 and the second finger 62 are perpendicular to the central axis 90C passing through the rear end portion from the front end portion of the main body unit 90 including the opening / closing device 70 and perpendicular to the longitudinal axis.
  • notches 63 and 64 having a semicircular head shape opening in the direction 1E away from the central axis 90C are formed. Therefore, the notch 63 provided in the first finger 61 and the notch 64 provided in the second finger 62 open in opposite directions.
  • the rear ends of the fingers 61 and 62 are formed in a bowl shape by the notches 63 and 64.
  • the opening / closing device 70 opens and closes by moving the first finger 61 and the second finger 62 in directions opposite to each other in a direction orthogonal to the divided surfaces of the divided nozzles 91 and 92 of the jet nozzle 20.
  • the opening / closing device 70 opens and closes the pair of fingers 61, 62 at the mounting position 10B to merge or divide the first divided nozzle 91 and the second divided nozzle 92, and at the same time, the first divided nozzle 91 and the second divided nozzle 91
  • the divided nozzle 92 and the jet nozzle 46 are combined or separated.
  • the opening / closing device 70 is a direction perpendicular to the divided surfaces of the divided nozzles 91 and 92 around one axis in the vertical direction around the same fulcrum 65 for the first finger 61 and the second finger 62. Are opened and closed by reciprocating in the opposite directions in the turning direction 1F on the mounting plane.
  • the double-open and double-closed configuration in which the pair of fingers 61 and 62 in the attachment / detachment device 7 swings and reciprocates in opposite directions around the same fulcrum 65 opens and closes at the mounting position 10B. It is possible to combine or separate the first divided nozzle 91, the second divided nozzle 92, and the jet nozzle 46 while combining or dividing the divided nozzle 92.
  • the automatic wire insertion device 1 shown in the figure can attach and detach the jet nozzle 20 and the jet nozzle 46 in one operation, reducing the number of steps in the attachment and detachment of the jet nozzle 20 and reducing the time required for automatic wire insertion. It is effective in that it can be shortened. Further, the configuration of the main unit 90 shown in FIGS. 5 and 6 is important in that the jet nozzle 20 can be swung between the retracted position 10A and the mounting position 10B as a result.
  • the opening / closing device 70 includes a driving device 78 that is a cylinder device that linearly reciprocates in a single longitudinal direction 90Y parallel to the central axis 90C of the main unit 90, and a longitudinal one so as to open and close the pair of fingers 61 and 62.
  • a pair of arms 71 and 72 that simultaneously rotate in opposite directions in the turning direction 1G on the mounting plane around the axial direction, and a linear reciprocating motion in the one-axis direction 90Y of the drive device 78 rotate the arms 771 and 72.
  • a conversion joint 73 that converts the rotational reciprocating motion in the direction 1G.
  • the driving device 78 is an air air cylinder that operates with compressed air supplied from an air source (not shown).
  • the air cylinder is advantageous in that it can provide a necessary and sufficient force in the direction in which the divided nozzles 91 and 92 of the jet nozzle 20 are combined against the pressure of the high-pressure water compared to the size.
  • the arms 71 and 72 are reciprocally moved around one axis in the vertical direction in the turning direction 1G opposite to the turning direction 1F on the same mounting plane as the turning direction 1F of the first finger 61.
  • the first arm 61 on the right side from the front for turning the first finger 61 in the turning direction 1F and the same mounting plane as the turning direction 1F of the second finger 62 are opposite to the turning direction 1F.
  • Each of the arms 71 and 72 has a roller-like cylindrical member 74 that holds the united jet nozzle 20.
  • the cylindrical member 74 is formed along the edges of the semicircular cutouts 63 and 64 formed in the rear end portions of the pair of fingers 61 and 62, respectively. Move while rotating around the central axis of the cylinder.
  • the diameter of the cylindrical member 74 is smaller than the diameter of the semicircular arc portions of the notches 63 and 64.
  • the cylinder internal pressure of the cylinder device of the drive device 78 is changed so that the conversion joint 73 is in a position in front of the main body unit 90. Therefore, the coupling of the jet nozzle 20 is held by the force of compressed air against the force of high-pressure water that attempts to separate the jet nozzle 20.
  • the cylindrical member 74 attached to the distal ends of the arms 71 and 72 is in a substantially locked state against the force in the direction in which the fingers open when the jet nozzle 20 is united, and the cylinder device is compressed air. It has the effect
  • the cylindrical member 74 When the jet nozzle 20 is united, the cylindrical member 74 is stopped so as to push forward at the edges of the straight portions of the notches 63 and 64, and is locked in the direction in which the pair of fingers 61 and 62 are about to open. However, since the cylindrical member 74 is configured to rotate around the central axis of the cylinder, the conversion joint 73 linearly moves rearward and pulls the arms 71 and 72 so as to turn in a direction approaching the central axis 90C. When the cylinder member 74 is used, the cylindrical member 74 rotates and easily moves out of the straight portions of the notches 63 and 64. Therefore, the cylinder device can easily retract the piston, and the jet nozzle 20 can be divided.
  • the stopping position of the cylindrical member 74 when the jet nozzle 20 is united greatly exceeds the position perpendicular to the edges of the straight portions of the notches 63 and 64 so that the arms 71 and 72 are separated from the central axis 90C. If it extends too far in the separating direction 1E, when the conversion joint 73 moves rearward, the arms 71, 72 do not pivot in a direction approaching the central axis 90C in an attempt to pivot in a direction separating in the direction 1E away from the central axis 90C. Therefore, as shown in FIGS. 5 and 6, the stop position of the cylindrical member 74 when the jet nozzle 20 is combined is configured so that the arms 71 and 72 always return in the direction approaching the central axis 90 ⁇ / b> C. However, it is not difficult to design.
  • the jet nozzle 20 is located at the retracted position 10A as shown in FIG.
  • the pair of fingers 61 and 62 are closed to prevent the jet nozzle 20 from being damaged.
  • the pair of fingers 61 and 62 may be opened in advance.
  • a control device (not shown) is started based on an input from a button or switch on the control panel in the numerical control device or a touch sensor on the screen of the liquid crystal display or a command signal according to the decoded NC program.
  • the control device is a sequencer that operates the automatic wire insertion device in a prescribed order.
  • the cutter 18 is actuated to cut the wire electrode 2 so that the tips of the wire electrode 2 are aligned.
  • the winding electrode of the discharge device 56 is driven to discharge the remaining wire electrode 2 to the bucket 58.
  • the cut piece is discharged out of the apparatus by a tip processing device (not shown).
  • the drive unit 82 of the moving device 80 of the attachment / detachment device 7 is actuated by a signal from the control device to push down the main body unit 90 forward.
  • the drive device 78 of the opening / closing device 70 is operated while the main body unit 90 is oscillating.
  • the fingers 61 and 62 are opened to divide the jet nozzle 20.
  • the body unit 90 of the detachable device 7 that has been pushed down is supported by a swing blanket 81 that rotates in the rotational direction 1D in a pendulum manner around the X-axis direction around the fulcrum 81X. Then, it swings in one stroke from the retracted position 10A to the mounting position 10B just below the opening of the jet nozzle 46 in the rotational direction 1D.
  • the drive device 78 of the opening / closing device 70 in the main unit 90 is operated to advance the conversion joint 73.
  • the conversion joint 73 moves to the front of the main unit 90, the arms 71 and 72 turn in the opposite directions in the turning direction 1G toward the outside around the vertical axis.
  • a part of the side surface of the cylindrical member 74 moves in contact with the edges of the notches 63 and 64 formed at the rear end portions of the fingers 61 and 62 while rotating to move the fingers 61 and 62 forward of the main body unit 90. Extrude into. Since the fingers 61 and 62 pushed out forward are supported by the fulcrum 65, the turning direction 1F opposite to the turning direction 1G on the same mounting plane as the turning direction 1G of the arms 71 and 72 around the fulcrum 65 is provided. And the split nozzles 91 and 92 attached so as to face the tip portion are combined, and at the same time, the split nozzles 91 and 92 and the jet nozzle 46 are combined.
  • annular protrusion 48 having an inclined surface is provided on the jet nozzle 46, and a shape corresponding to the annular protrusion 48 is formed on the upper inner peripheral surface 24 of the outer frame 23 of each divided nozzle 91, 92 constituting the housing of the jet nozzle 20.
  • the annular groove 25 is formed at a position facing the annular protrusion 48. Therefore, when the jet nozzle 20 is united at the mounting position 10A, the annular groove 25 fits along the inclined surface of the annular projection 48, and the misalignment between the divided nozzles 91 and 92 and the jet nozzle 46 is absorbed, which is a failure.
  • the divided nozzles 91 and 92 are surely combined with each other, and at the same time, the divided nozzles 91 and 92 are coupled to the jet nozzle 46.
  • the jet nozzle 20 is orthogonal to the radial direction 1C of the jet nozzle 20 at least on the upper divided surface 23U on the upper side of the outer frame corresponding to the portion forming the chamber 22 of the outer frame 23 of each divided nozzle 91, 92.
  • a trough-shaped protrusion 26 and a trough-shaped groove 27 having a shape that fits the chevron 26 are opposed to each other so as to be fitted to each other. Therefore, when the jet nozzle 20 is united at the mounting position 10A, the valley-shaped groove 27 is guided and fitted to the inclined surface of the chevron projection 26 so that the divided surfaces of the first divided nozzle 91 and the second divided nozzle 92 are aligned. It is precisely aligned and the dividing surface is sealed.
  • the jet nozzle 20 is swung in one stroke from the retracted position 10A to the mounting position 10B and the first divided nozzle 91 and the second divided nozzle at the mounting position 10B. And the jet nozzle 20 is attached to the jet nozzle 46 in only two steps, including the step of attaching the jet nozzle 20 to the jet nozzle 46.
  • the jet nozzle 20 is attached to the jet nozzle 46 by simply opening and closing the pair of fingers 61 and 62. Therefore, the automatic wire insertion device of the embodiment has a relatively simple operation and a small number of processes.
  • high-pressure water is supplied to the jet nozzle 20 along the direction 1B in which high-pressure water is supplied from the jet nozzle 46, as shown in FIG.
  • the high-pressure water supplied to the chamber 22 is jetted coaxially with the direction in which the wire electrode 2 is sent out from the jet nozzle body 21 in the jet direction 1A.
  • a jet is supplied to the guide pipe 12 from the jet supply unit 14 shown in FIG. Further, the upper energization body 32 shown in FIG. 2 is retracted to a position where it does not get in the way so as to be separated from the delivery path of the wire electrode 2.
  • the guide pipe 12 is lowered until the tip of the guide pipe 12 passes over the upper electric conductor 32 and reaches a height position just above the upper wire guide 31, and the tension roller 42, which also serves as a feed roller, and the wire electrode 2 feed out.
  • the wire electrode 2 in the guide pipe 12 is sent out in cooperation with the sending roller 16 that sends it out without departing from the path.
  • the tip of the wire electrode 2 guided by the guide pipe 12 and passed through the upper wire guide 31 is surrounded by the high-pressure water supplied along the direction 1B in which the high-pressure water is supplied. While being guided, the wire electrode is fed into the jet nozzle body 21 while maintaining the feeding path. Then, it is propelled while being restrained by the jet and led to the entrance of the start hole.
  • the tip of the wire electrode 2 that has been inserted into the start hole and passed through the lower wire guide is captured and connected to the winding roller of the discharge device 56 shown in FIG.
  • the control device stops feeding the wire electrode 2. Further, the control device stops the supply of the jet from the jet supply unit 14 shown in FIG. 1, raises the guide pipe 12 to the initial position where the tip of the guide pipe 12 is located above the cutter 18, and the jet nozzle 46. Stop the supply of high-pressure water from
  • the drive device 78 of the opening / closing device 70 in the main unit 90 is operated to retract the conversion joint 73 to the initial position.
  • the arms 71 and 72 turn in opposite directions in the turning direction 1G toward the inside approaching the central axis 90C.
  • a part of the side surface of the cylindrical member 74 moves while rotating in contact with the edges of the notches 63 and 64 formed at the rear end portions of the fingers 61 and 62, respectively.
  • the fingers 61 and 62 are pulled down to the rear of the main unit 90.
  • each of the divided nozzles 91 and 92 of the jet nozzle 20 mounted so as to be pivoted in the opposite directions around the vertical axis and released to be opposed to the tip portion is divided.
  • the cylinder device of the driving device 82 of the moving device 80 is operated to pull up the main unit 90 backward.
  • the main body unit 90 pulled up rearward is supported by a swing blanket 81 that rotates in a rotational direction 1D in a pendulum-like manner around the X axis direction around a fulcrum 81X.
  • the rocking is performed in one stroke.
  • the wire electrode 2 is already connected between the upper and lower wire guides since the wire electrode 2 is already connected when the jet nozzle 20 is separated from the jet nozzle 46, removed and swung to be accommodated in the initial retracted position 10A. It is in a state of being stretched around. At this time, since the jet nozzle 20 is vertically divided from the center to the left and right, and the pair of fingers 61 and 62 move in opposite directions to open and close, each split nozzle 91 and 92 It can come out without being caught by the stretched wire electrode 2 and can be detached from the mounting position 10B.
  • the automatic wire insertion device of the present invention is not limited to the configuration of the automatic wire insertion device specifically illustrated and described, but deviates from the technical idea of the present invention as some examples have already been given. Modifications can be made without departing from the scope.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Nonwoven Fabrics (AREA)
PCT/JP2009/002930 2008-06-25 2009-06-25 ワイヤ放電加工装置の自動ワイヤ挿通装置 WO2009157205A1 (ja)

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Cited By (4)

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EP2564967A1 (en) * 2010-04-27 2013-03-06 Sodick Co., Ltd. Automatic wire threader for wire electric discharge machining apparatus
CN107020425A (zh) * 2016-02-02 2017-08-08 阿杰·查米莱斯股份有限公司 用于电火花丝腐蚀机的电极丝穿丝的装置
CN113996876A (zh) * 2021-11-29 2022-02-01 王晓忠 线切割机床自动穿丝装置及自动穿丝、自动收丝方法
WO2022118045A1 (en) * 2020-12-04 2022-06-09 Texture Jet Limited A nozzle

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JP5232310B1 (ja) * 2012-01-17 2013-07-10 ファナック株式会社 ワイヤ放電加工機のワイヤガイドの固定機構
CN103949737A (zh) * 2014-05-13 2014-07-30 东莞华中科技大学制造工程研究院 一种线切割自动穿丝机构
CN104339051A (zh) * 2014-10-28 2015-02-11 苏州市宝玛数控设备有限公司 一种多点接触式电极丝限位器
CN106077855B (zh) * 2016-07-11 2017-12-29 上海交通大学 定向内冲液式高速电弧放电加工的旋转电极
CN110899879B (zh) 2019-10-30 2021-01-01 沙迪克(厦门)有限公司 放电加工装置的下侧引导单元

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JP4269121B2 (ja) * 2000-02-15 2009-05-27 ソニー株式会社 撮像記録装置および撮像記録再生装置
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JPS56146629A (en) * 1980-04-15 1981-11-14 Mitsubishi Electric Corp Working liquid sprayer of wire-cut discharge processing device
JPH02100827A (ja) * 1988-10-08 1990-04-12 Fanuc Ltd 細穴に対する自動ワイヤ結線方法とその装置
JPH04269121A (ja) * 1991-02-25 1992-09-25 Fanuc Ltd 精密ワイヤ放電加工装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2564967A1 (en) * 2010-04-27 2013-03-06 Sodick Co., Ltd. Automatic wire threader for wire electric discharge machining apparatus
EP2564967A4 (en) * 2010-04-27 2014-01-15 Sodick Co Ltd AUTOMATIC WIRE IMPORTER FOR A WIRE MACHINING MACHINE WITH ELECTRICAL DISCHARGE
CN107020425A (zh) * 2016-02-02 2017-08-08 阿杰·查米莱斯股份有限公司 用于电火花丝腐蚀机的电极丝穿丝的装置
EP3202518A1 (de) 2016-02-02 2017-08-09 Agie Charmilles SA Vorrichtung für das einfädeln der drahtelektrode einer drahterodiermaschine
US10421140B2 (en) 2016-02-02 2019-09-24 Agie Charmilles Sa Device for threading the wire electrode of a wire electrical discharge erosion machine
WO2022118045A1 (en) * 2020-12-04 2022-06-09 Texture Jet Limited A nozzle
CN113996876A (zh) * 2021-11-29 2022-02-01 王晓忠 线切割机床自动穿丝装置及自动穿丝、自动收丝方法
CN113996876B (zh) * 2021-11-29 2024-06-07 王晓忠 线切割机床自动穿丝装置及自动穿丝、自动收丝方法

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CN101980815A (zh) 2011-02-23
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JP2010005719A (ja) 2010-01-14

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