JPS5964228A - Wire electrode feeder for wire-cut electric discharge machine - Google Patents

Abstract

PURPOSE:To make a wire electrode feedable in an automated manner, by automatically cutting the wire electrode at a specified position, while removing the cutting remainder therefrom. CONSTITUTION:Having turned an arm 52 round by 180 deg. toward a wire electrode 38 by operating a driving motor 54 for a cutting mechanism 50, a solenoid 58 is set in motion and the wire electrode is cut left behind the specified length as long as from the lower end part of a pipe guide 36 with a cutter 66 attached to the tip of a rod 56. In a state that the wire electrode of the cutting remainder is left clamped intact by a clamp pin 68 on the tip of the rod 56, the driving motor 54 is operated and, after the arm 52 is brought back to its original position again, clampingness in the clamp pin 68 is released whereby the rest of the wire electrode 38 is removed. Next, operating a driving motor 20 on top of a guide 14, a pipe guide 36 installed tight in a slider 16 is made to piece through a cutting start hole 12a of a workpiece 10 and then lowered down to somewhere short of an electrode guide 72.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a wire electrode supply device for a wire-cut electrical discharge machining device, and in particular, a new automatic wire electrode supply device when the wire electrode of the wire-cut electrical discharge machining device is disconnected during cutting. In addition, if there are separate cutting parts on the same workpiece, the wire 'f4'rwL can be automatically cut once, and then the wire electrode can be automatically supplied to the next cutting part. The present invention relates to a mechanism for continuously feeding a wire electrode fed so as to penetrate a workpiece to a predetermined position in a wire electrode feeding device of a cut electric discharge machining apparatus.

Wire-cut electrical discharge machining involves placing a wire electrode facing the workpiece through a small gap, repeatedly generating pulsed electrical discharge between the workpiece and the wire electrode, and cutting the workpiece using the discharge energy. This device is well known and has the advantage of being able to easily perform complex cutting operations on hard metals and the like with high precision.

Therefore, when electrical discharge cutting is to be carried out on a wave-forced workpiece, it is necessary to feed the wire so as to penetrate the inside of the workpiece. The wire electrode is usually made of thin metal, and it is difficult to supply the nuclear force [1] by penetrating it through the workpiece, so it is emitted to +% by hand.
Wire cuts often break due to abnormal situations during turtle machining.

In the past, workers were forced to perform a difficult task of supplying wire electrodes each time. Furthermore, if there are multiple separate cutting sections in the same workpiece, such as when performing progressive cutting, conventionally, one cutting section is divided into cutting forces [1 section]. rear.

Once the wire electrode is cut and removed, the wire electrode must be manually re-supplied to the starting point of the next cutting process, which is difficult to do, making it impossible to fully automate the wire-cut EDM machine, and the machining efficiency is reduced. This was a factor that led to a significant decline in the amount of debt.

The present invention has been made in view of the above-mentioned conventional problems,
The purpose of this is to automatically cut the wire electrode at a predetermined position and remove the wire electrode that remains after cutting, which allows the wire-cut electrical discharge machining equipment to be fully automated. To provide a wire box pole supply device that can reliably supply five wire electrodes of a wire-cut electrical discharge machining device to a predetermined position, and can also reliably feed a wire electrode to a predetermined position. .

”-9 In order to achieve the above objects, the present invention provides the following features for the workpiece: 1-7. A wire cutter that uses wire electrodes to face each other with a small gap between them, generates a pulsed discharge between the workpiece and the wire electrode, and uses the discharge energy to cut the workpiece with a cutting force. .

A pipe guide equipped with a tooth bar guide at the same tip that supports the wire electrode in a slidable manner, and a pipe guide that supports the wire electrode in a slidable manner at a position facing the pipe kite with an extraction force member interposed therebetween. a moving mechanism that moves the pipe kite so as to pass through the workpiece, a clamp mechanism that fixes the pipe guide in a predetermined position, and a hike guide that moves in unison with the pipe kite. A pair of C) roller mechanisms equipped with a reversal prevention mechanism that can supply the wire electrode inside the pipe kite and prevent the wire electrode from coming out from inside the pipe kite when the wire electrode is disconnected; Cutting [2, Cutting HTr machine m that removes the cut residue of the wire electrode, and feeding out the wire electrode continuously from the tip part C as it is traced through the nuclear force II construction I:) -f- \' Electrode feeding mechanism,
It is characterized by a tension ridge structure that prevents the wire electrode from sagging and provides a predetermined tension necessary for processing.

Preferred embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a preferred embodiment of the wire electrode supply device according to the present invention.

Reference numeral 01 denotes a workpiece, which is placed on an XY cross-stiffle (not shown) that is movable in a horizontal plane.

(12a) and (12b) are cutting process start holes drilled in advance on the surface of the workpiece o1. A kite 041 supports the wire electrode supply device, and is fixed to a shaft movable in two axial directions, that is, in the vertical force direction, of the main body (not shown) of the wire cut processing device.

f+61 &t- A slider forming part of the movement mechanism t171.

It is provided so that it can freely slide up and down along the guide I. The slider (16 is screwed into the drive screw (11), and the upper end of the drive screw 6s is the kite t11
Connected within the drive motor fixed to the top.

Slider by drive screw 01 and drive motor ■
(The IQ automatically slides along the guide 04. A roller mechanism is provided on the slider uυ.

The roller mechanism +221 consists of a pair of wire electrode feeding pulleys (24) and a clamp pulley (A), and the rotation axis of the wire feeding tool II-f24+ is connected to the slider (1
61 is also connected to a wire electrode feeding motor ■.

The wire electrode feeding pulley (24 is equipped with a reversal prevention mechanism. Furthermore, the clamp pulley ■ is attached to the bottle C'l
The link C+21 is rotatably supported at the tip of the link cl, which is rotatably fixed to the slider αm via Fl.
The rear end is connected to the slider via a coil spring C141, and the link G is connected by the elastic force of the coil spring C3O.
The clamp pulley (A) at the tip of the wire is always pressed against the periphery of the wire box rod feeding boob IJ-ff141. The equipment is a pipe guide into which the wire electrode (2) can be inserted and supported, and its upper end is connected to the slider +I [fl
is fixed to. An electrode guide (shown in FIG. 2) that slidably supports a wire electrode is fitted into the lower end of the pipe guide. At the lower end of the guide (14).

A clamp mechanism (43) is provided that can clean and support and fix the pipe guide (G) in a predetermined position.The clamp mechanism (43 is a clamp plate with a V structure cut out fixed at the bottom of the guide (141) (+4a) and the guide (141) fixedly attached to the solenoid (clamp plate (44
b), and when the solenoid (461) is activated, one clamp plate (+4b) is activated by an externally applied clamp plate (+4a).
), the clamp state is released, and the solenoid (461) and the clamp plate (
44b) Coil spring +4g+ held between
Due to the force of the bullet, one clamp plate /44b) approaches the other clamp plate (+4a) and maintains the clamped state. Open is a cutting mechanism that cuts the wire electrode at a predetermined position and eliminates the cut residue of the wire electrode, 621 is the arm of the main body, and arm C'i21 is the cutter of the kite f141.
1) The drive motor 64) is fixed to the 111 wall so that the drive motor 64) can be used for training in a horizontal plane.
is fixed to the rotating shaft. Is there an arm mark on 111 inside arm 6z? 1] A slidable rod is provided, and when the solenoid ff1ll is created by a link rotatably fixed via a solenoid cap and a pin bag, which are also fixed to the arm 62, the link ( The rod 62) moves toward the tip of the arm 6z. In addition, a coil spring fi41 is stretched between the rear end of the rod and the side wall surface of the arm 6η, and when the solenoid Ω is released, the rod (a) is moved against the arm 6 by the divine force of the coil spring f[i41. Slide back 1v. A cutting tool and clamp pin phase are fixed on the rod tip surface.
The rod 661 is moved to the tip of the arm 621, and the wire electrode inserted between the tip of the rod (56) and the inner wall of the arm is fixed with a clamp bottle 8) and cut with a knife. can. A coil spring σ1 is held between the lamp pin and the tip of the rod (IIn).

It gives the clamp bottle track an elastic force of n[. ff)
5 is the above-mentioned pipe guide C (
The electrode kite is installed in a position opposite to the electrode kite in 61, and the wire tip is slidably inserted into the electrode kite.
! J1. Support the example wire electrode in place. Below the electrode kite σ, the wire electrode supplied so as to penetrate the workpiece 01 is continuously fed out from the tip, and the remaining part of the broken wire electrode is also fed out to the workpiece ( 1 (wire electrode feeding mechanism ff4 for removing from inside I) is provided.The wire electrode feeding mechanism includes two sets of feeding rollers (76a).

(76b) and (79(1), (79θ)), and the two silk delivery rollers (76a), (76b) and (79d), (yqe) are arranged so that their peripheral edges are brought into pressure contact with each other. The roller diameters of (79a), (79b), and (79d,) are the same or almost the same, and the diameter of (79d,) is smaller than the diameter of (76b). For example, the rotating shaft of the feed roller (76b) is made to be large in diameter (even if the feed motor ff1ll is stopped, it can only rotate in the direction of the arrow) (for example, a one-way clutch). It is connected to the delivery motor via rollers (79a), (79b) and a bell (79C), and another delivery roller (79d) is connected to the delivery motor (79C) via rollers (79a), (79b) and a bell (79C), and another delivery roller (79d) is
A delivery roller (79e) is provided in pressure contact with (79(L)), and a guide pipe (760) and a guide pipe (79f) are connected to the delivery roller (79b) (79(L)).
) is provided. Also, the feed roller (79θ)
A voltage 6111 is applied between the wire electrode and the wire electrode on the pipe guide (a), and a signal is output from the detector when continuity is established. In addition, there is a wire electrode above the kite (141).
Tension mechanism (R11) that prevents sagging and always provides the predetermined tension required for processing to the 4-pole m1 wire.
is provided. The tension mechanism 030i rotates in the opposite direction to the direction in which the wire electrode (support) I is fed and the bobbin around which the wire electrode (support) I is wound.
It is set so that a torque of a degree that is not separated by 7 is generated, and the torque motor 1lt41 and the force 11 are set to the same specified σ.
(In order to apply force to the wire box bar eel, it is made up of a brake roller 1) combined with an electromagnetic brake mechanism and a rotation detection unit), and a torque motor F84 is used to constantly feed one row of wire electrodes to the bobbin IR1. Gives a certain repulsive force to the ocean? +1) Tension can be applied by running the wire electrode by the brake.

Figure 2 is an enlarged cross-sectional view of the case where the wire electrode is supplied by passing it through the 11 workpieces using the above-mentioned wire electrode supply device. will be added and the explanation will be omitted. (The helmet is a box rod guide fitted to the light end inside the pipe kite (A).

A die-shaped guide (9z (in the example, the guide had a diameter 5 to 10 μm larger than the wire electrode) made of diamond was fitted into the sintered metal body 1'1l (through the pipe guide). It is now a relic that was left behind.Also.

Similarly, the 1i pole tunnel guide located below the workpiece 00 is also made of diamond die-shaped guide ceramic (in the example, the wire 'i'
It has a structure in which 11 poles (the guide diameter is 5 to 10 Izm larger than ?8) are fixedly supported on the sintered metal plate.

With the above configuration, cutting 1 on the surface of workpiece 01
11 When attempting to automatically supply wire electrodes (support) to the cutting start holes ('1211) and (t2b), pull out the pipe kite OQ coaxially with one of the cutting start holes (12a), for example. Move the force 11 relative to the workpiece 01, activate the solenoid (phase) to open the clamp mechanism f43, release the pipe guide (2), and activate the drive motor (a) to move the slider 〇□□ □ Kite 114
1. After moving the pipe kite ■ upwards to the top of the kite 041, operate the roller mechanism 021 of the slider (161) and move the wire until the tip of the wire electrode extends an appropriate M from the bottom end of the vibe kite ■. Electrode c (8)
into the pipe guide I3e. At this time, the tension mechanism fl1 is set so that the tension is the minimum that corresponds to the supply force of the wire %jThG81 by the roller mechanism (2) and does not cause the wire electrode (goods) to separate from the roller mechanism (tension mechanism (2)).
01 torque motor (foundation), which controls the city magnetic press lnoke (foundation). Next, μti, l(h
After turning the motor 6 (1) and rotating the arm mark 180 degrees in the same direction as the wire electrode, operate the solenoid side and use the cutter mark on the tip of the rod 66 to move the wire electrode to the lower end of the pipe guide (A). Quantitative determination (in the example, 3 to 1
Cut the remaining length of the wire %-t+(9) with a clamp pin at the tip of the rod, operate the drive motor 6, and ladle. After returning the toe arm 1521 to the original position 1, the clamp pin 1 is released from the clamped state and the remaining part of the wire electrode 2 is removed.

Next, operate the drive mode p-(2Ill) on the upper part of the guide (141) to lower the slide' 1161 along the guide (141K), and move the pipe kite am fixed to the slider (161) to cut the workpiece (1). Starting hole (12a,)
is passed through the page and lowered to the front of the box rod kite ff3 below the workpiece o1. The state after performing the above operations is shown in Figure 2. After achieving this state, immediately operate the roller mechanism on the slider (16) and the wire electrode feeding mechanism, control the tension of the tension mechanism □ again, and feed the wire electrode bullet into the vibe guide C]61. 9
The tip of the wire electrode mark is passed through the % pole guide @ and 62, and the tip of the wire electrode mark is sandwiched between the feed rollers (76a) and (76b) of the wire electrode feed mechanism a4 and fed out 9.
Next, it is guided by a guide (760) and a guide pipe (79f) and discharged to the outside by the next rollers (79d) and (79e). At this time, the feed roller (76a), (7
61)) and (79d), (79e) are made of the same diameter or 1"!, FJ, so bending and distortion of the wire box rod can be corrected. For this reason, the guide (7
6C) and the guide pipe (76f), a thin wire electrode @ (usually φ0.15 mm to φ0.25 mm) is sent out without clogging. Also, the feed roller (76
The diameter of (79d) is larger than that of (76b).
).

It is continuously fed out between the guide pipes (79f) without slack. Furthermore, the wire electrode...) is connected to the feed roller (79
e) When Ig arrives, it is known by the signal from the detector O4 that the wire is completely placed between the wire electrodes or in the number of wire threads,
The operation of the roller mechanism Q7I is stopped, and the first winding mechanism a4 is also stopped, and the drive motor 0 (lI) is operated to align the slider 0 mark along the guide (14).

Pull out the pipe guide (G) from the workpiece OI. After that, return the solenoid (46) and guide the lower end of the pipe kite marked 04) Lower clamp mechanism +4
2 and secure it to the kite (14). In this way, the wire electrode (
It is possible to automatically supply nuclear power by penetrating it through the 11 nuclear power plants.

Next, a case will be explained in which the wire electrode is automatically supplied again when an abnormal situation occurs during electrical discharge cutting and the wire electrode is disconnected. If the wire between the electrodes breaks at the processing section, the roller mechanism c! on the sliter (16) will break! 21 is equipped with a reversal prevention mechanism, and when the movement of the guide (141 upper tension @ structure wire eriphuan) stops moving, a signal is output from the rotation detection part 1) to determine an abnormal situation, and the tension mechanism In order to reduce the tension by a predetermined value or to change it to a predetermined value, the wire is not pulled out of the middle of the pipe, and the state of clamping is maintained by the roller mechanism 02). In this state, open the clamp mechanism +ur at the lower end of the kite (141) to open the pipe kite (to), and rotate the drive motor 1211 to move the pipe guide (1) to the guide 04.
) When it rises to the top, the electromagnetic brake (c) of the tension mechanism bends, the torque motor, )X 3141 (
1) Collect the wire electrode cans into the bobbin ~ by controlling each current so that the wire electrodes do not separate from the tension mechanism shaft. Further, the remaining part of the broken wire electrode (goods) is rolled up and removed from the workpiece Ql by operating the wire electrode delivery mechanism σ4). Next, the pipe kite part is moved relative to the extraction force 11 workpiece so that it is coaxial with the cutting start hole (12a,) of the workpiece, and thereafter the above-mentioned cutting start hole (12a) is moved. The wire electrode supply device is operated according to the method of supplying the wire electrode G81 in step 12a) to automatically supply the wire electrode G81 so as to pass through the workpiece 01'I. Thereafter, the wire electrode (G) is moved to the wave force f1 workpiece Ql without discharging according to the cutting process until the wire electrode (G) is broken. Started cutting process. In addition, the above-mentioned relative movement of the wire electrode can with respect to the workpiece 01 is caused by the CN installed in the wire cut discharge force 11 machine.
It is preferable to attach the food automatically using a cage □ (not shown).

Next, a method of supplying wire electrode cans when the same workpiece 0 (IK) has a plurality of separate cutting locations will be described.

After cutting one cutting point on the separated workpiece 7J11 0I, stop the feeding motor cm of the wire electrode feeding mechanism ff41, which was rotating during cutting force 11, and stop the movement of the wire electrode (support). stop. Next, operate the solenoid 1461 of the clamp machine Dt1421 to release the clamp state [7, Guide the pipe kite 0 mark (14
1 Operate the dewormer 11 motor (company) on the top of the guide (
141 Climb to the top. After that, rotate the 6 arms between the cutting machine grooves to the wire electrode direction, and Sol/Noid 0121! Make lij + wire electrode Ω with knife 1
Along with cutting.

The winding motor (to) is rotated and the cut remaining portion of the wire electrode (9) is removed from the workpiece 01 by the winding mechanism aa. (7) Connect the cutting mechanism to the wire electrode (38) again.
Rotate the workpiece (9F) back to the original position (7, rotate the workpiece (1CI) so that the next cutting start hole (+2b) and the pipe guide (IIP) are on the same axis. l
[Move I.

The wire electrode supply device is operated according to the method for supplying the wire electrode can into the cutting process start hole (+2a) described above, and the wire electrode is automatically supplied by passing the wire electrode through the workpiece (10), and the discharge is performed. [Cutting force] Make sure to perform one cut continuously.

As shown on JM 2 Wire cut discharge power according to the present invention 11
Engineering equipment f-! The wire supply device inserts the wire into the die-shaped electrode kite, guides the wire 111 pole securely, and discharges it out of the wire-cut electric discharge machine system. An abnormal situation occurs when the wire electrode is disconnected.

Automatically removes the wire electrode disconnection residue from the workpiece 17,
It is now possible to automatically supply wire poles by penetrating the workpiece. Also.

Cyclo-nuclear force 11 Ill shearing force of several collars separated in the workpiece [1
When there is a cutting part, the cutting force 1 on one cutting side Qi
After completing 1st work, wire electric 1. After the pole is automatically cut once and removed from the workpiece, the next cutting force is set to 1 machining start lock r9r.
The wire electrode can be resupplied automatically, allowing the cutting process to continue without manual intervention. As a result, if the wire electrode supply device is automatically controlled using the ON OjlilJ control device of wire cut electrical discharge machining equipment, it becomes possible to fully automate and unattend the wire cut electrical discharge machining equipment, significantly increasing the labor efficiency. It is possible to raise it to Further, the wire electrode feeding mechanism of the present invention is a conventional wire cutting mechanism without a wire electrode feeding device.
) It goes without saying that it is extremely effective when attached to Jn machine tools.

[Brief explanation of drawings]

FIG. 1 is a perspective explanatory view showing a preferred embodiment of the wire electrode supply device according to the present invention, and FIG.
FIG. 3 is a partially enlarged sectional view of the pole supply device. In each figure, the same symbols are used for parts (tetL,, al is the wave power 11 structure, C'lR1 is the wire electrode, pole, σ2 and vessel are the electrode guides. (g) is the pipe guide, f+7 is the movement mechanism, (4z is the clamp mechanism, 01 is the reverse prevention mechanism, or roller mechanism, @ is the cutting + 4) mechanism, the nail is the winding mechanism, and 01 is the tension mechanism. Agent Nobuo Hadano - Procedural amendment ( (Voluntary) Mr. Commissioner of the Japan Patent Office 1, Indication of matter r'1. Patent application 1982-171482
No. 2, name of the invention: wire cut radiation f4i, wire electrode supply device 1q for processing equipment. 3. To the representative of the person making the amendment, Katayuni Kata 1. Agent 5. Subject of the amendment (1) Scope of claims in the specification (2) Detailed description of the invention in the M document 6. Amendment Contents (1) The scope of claims in the specification is revised in a separate document. (2) In the specification, on page 2, line 5, the phrase ``electrode, feeding mechanism,'' is corrected to read ``electrode feeding mechanism.'' (3) In the same book, page 11, line 18 K “(90)
Correct ``kej'' to ``(95)ha''. (4) In the same book, on page 11, line 20, "Dice-shaped guide (92) J" is corrected to "Dice-shaped guide (94) J." (5) In the same book, on page 12, line 2, “Sintered metal body (94
) J is corrected to [Sintered metal body (97) J. (6) In the same book, Volume 2, page 14, lines 5 and 6, replace "Electrode guide (92) J" with "Electrode guide (95) J.
I am corrected. 7. List of attached documents (11) One or more documents stating the amended scope of claims A wire electrode is placed opposite the workpiece with a small gap between the workpiece and the wire electrode, and a pulse is applied between the workpiece and the wire electrode. In a wire-cut electric discharge machining device that generates an electric discharge and cuts a workpiece using electric discharge energy, the pipe guide includes a die-shaped electrode guide inside the tip to slidably support a wire electrode; A die-shaped electrode guide that slidably supports a wire electrode at a position facing the pipe guide with a workpiece interposed therebetween; and 1. Movement to move the pipe guide so as to penetrate through the workpiece. The mechanism and the pipe guide are fixed in a predetermined position, and the lamp mechanism and the pipe guide move together as one, supplying the wire electrode into the pipe guide, and removing the wire electrode from the pipe guide when the wire electrode is disconnected. a pair of roller mechanisms that can prevent the wire from being cut, a cutting mechanism that cuts the wire electrode at a predetermined position and eliminates the cut residue of the wire N and pole, and a wire that is fed so as to pass through the workpiece. A wire-cut electrical discharge machining device consisting of a wire electrode feeding mechanism that continuously feeds the electrode from the tip, and a tension mechanism that prevents the wire electrode from sagging and always applies a predetermined tension necessary for machining. In the wire electrode supply device, the wire electrode feeding mechanism has the same or
1. A wire electrode supply device for a wire-cut electrical discharge machining device, characterized in that it comprises two rollers having the same diameter and pressed together. -18(

Claims (1)

[Claims] A wire-cut electric discharge machining device that places a wire electrode facing nine workpieces with a small gap between them, generates a pulsed electrical discharge between the workpiece and the wire electrode, and cuts the workpiece using discharge energy. In this process, a pipe guide is equipped with a die-shaped electrode guide that supports the wire electrode slidably inside the tip thereof, and the wire electrode is slid in a position facing the pipe guide with the workpiece interposed therebetween. A die-shaped electrode kite that supports the pipe guide in a movable manner, a moving mechanism that traps and moves the pipe guide so as to pass through the workpiece, and a clamp mechanism and pipe guide that fix the pipe guide in a predetermined position are integrated. A pair of roller mechanisms are used to move the wire electrode into the pipe guide and to prevent the wire electrode from coming out from inside the pipe guide when the wire electrode is disconnected. A cutting mechanism that removes the cut residue of the wire electrode, a wire electrode that continuously feeds out the supplied wire electrode from the tip so as to penetrate the workpiece (7), a feeding mechanism that eliminates the slack of the wire electrode In the wire electrode feeding device of a wire cut electrical discharge machining machine, which is composed of a tension mechanism that prevents shifting and always maintains a predetermined tension required for machining pressure, the wire electrode feeding mechanism has the same length or I!lt. Pressure-welded with a diameter'#,
A wire electrode supply device for a wire cut electric discharge power e-work device, characterized in that it is provided with two (σ) rollers.