JPH03111127A - Automatic inserting/connecting method and device for wire electrode - Google Patents

Abstract

PURPOSE:To automatically insert and connect a wire electrode by connecting the end of a wire electrode to a dummy wire whose automatic insertion has been already completed, on the feeding side, and then after the traveling of the dummy wire has been stopped, by cutting off the dummy wire on the feeding side, and thereafter by discharging the dummy wire. CONSTITUTION:A dummy wire 1 whose automatic insertion can be easily done is drawn out from a dummy wire storing device 2, and is fred and insertedly passed up to a discharge device 26 to complete the automatic insertion and connection of the dummy wire 1, and then is temporarily stopped. Next, a wire electrode 27 is drawn out from a wire electrode storing device 29, and the end thereof is welded to the side of the dummy wire 1 on the feeding side by means of a welding device 8. Then, the dummy wire 1 is traveled, and therewith the wire electrode 27 is also traveled, and when it reaches the discharge device 26, once it is stopped, and the dummy wire 1 is cut off by a cutting device 6 on the feeding side, and further the wire electrode 27 is traveled and discharged together with the cut dummy wire 1 to complete the automatic insertion of the wire electrode 27.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for automatically inserting a wire electrode in a wire-cut electrical discharge machine, and more particularly to a method for automatically inserting a thin wire electrode and an apparatus used to carry out the method.

[Conventional technology]

A wire electrode cutting and connecting device is provided on one side of the upper or lower side of the workpiece, and a device for capturing a linear or rod-shaped guide and moving it in the axial direction is provided on the other side. A linear or rod-shaped guide is inserted into a through-hole formed at a required location (in order to prevent it from falling out, and inserted with both ends of the free end protruding from the workpiece, and the linear or rod-shaped guide is After connecting one end of the linear or rod-shaped guide and the tip of the wire electrode by the connecting device, the other end of the linear or rod-shaped guide is captured by the capturing and moving device and pulled out from the through hole, thereby connecting the wire. The one in which the electrode penetrates the workpiece was published in 1983.
It is presented in the publication No.-35,366. Furthermore, in Japanese Patent Application Laid-Open No. 63-260,723, a straight pilot member made of a rigid material that is easily inserted into a through hole of a workpiece is inserted, and the end of a wire electrode is butt welded to the end surface of the pilot member. 5- An automatic wire connection device has been proposed which allows a wire electrode to be easily passed through a workpiece by inserting a member into a through hole.

[Problem to be solved by the invention]

All of these conventional devices are presented with respect to the part that passes the wire electrode through the workpiece.

It is a transparent star in the part of the workpiece that is most difficult to pass through.
- A wire electrode that can be easily fed to the discharge device by passing the wire electrode through the hole (hole), for example, a wire electrode made of brass with a wire diameter of about 0.2 mm or more that is easy to handle. This conventional device uses very thin wires with a wire diameter of around 0.05 mm or less, or thin tungsten wires, molybdenum wires, iron wires coated with electrode materials such as brass (piano) wires, or even thin wires with high toughness and rigidity. Even if a wire electrode such as a brass wire is passed through the through hole of the workpiece by some method as described above, the wire electrode positioning guide in the nozzle, the power supply means, the guide roller part, and even the discharge device will be damaged. It has been difficult to automatically feed the wire electrodes through guide rollers, clamping guide belts, winding rollers, and other guiding tension parts of the wire electrodes.

- In this way, the present invention can be applied to wire electrodes such as very thin tungsten wires, thin tungsten wires, brass wires, wires coated with electrode materials such as brass wires, or brass wires. The purpose of IJ is to provide a method and device for automatically inserting and tying the F body (up to the 11th neck).

(Means for solving the problem) In order to achieve the objective 1-1 mentioned above, thin piano wire coated with thin tungsten wire, brass, etc. with a wire diameter of about 0.05 mm or less, used for processing, is used. Yo na Wai~7
A wire electrode storage device for electrodes, and a wire electrode for machining with a larger wire diameter than this wire electrode. and a dummy wire that determines the properties etc., a storage device for this dummy isoiya, a feeding device, and if necessary (a tensioning device provided and a dummy wire supplied from the storage device of this dummy wire A)] - attached to the body. Wire electrode and dummy wire) 7 storage supply side - (
- A cutting device that can also be used as a cutting device for the wire electrode to be cut, a workpiece facing the wire electrode from a direction substantially perpendicular to the axial direction of the wire electrode, etc. A feeding device that feeds and inserts a dummy wire toward the cutting tip side into a start hole that may be located in a spatial position in the outer region of the T body, and a feeding device that feeds and inserts a dummy wire toward the cutting tip side, and a wire 7 electrode to the wire to the dummy iso wire to the wire 7 electrode and a dummy wire to the workpiece. Equipped with a bonding device for bonding on the storage and supply side of Noi 17, and a discharge device for discharging used dummy isoiya and wire electrodes,
When automatically inserting the wire electrode, the dummy wire cut by the cutting device in the previous T is pulled out from the storage device and sent out, automatically inserted into the through hole of the workpiece, and the discharge device stops the dummy wire that has reached it. Then, the tip of the wire electrode supplied from the wire electrode storage device 7j is joined to the side of the dummy wire V by a joining device, and then the dummy wire is attached.
7 is run, and as the wire runs, the wire electrode 7 is automatically inserted from the workpiece to the 4JI output device, and the run is stopped. Then, after cutting the dummy isoiya, the wire electrode is run. This is what I did.

〔stomach! [for 〕

Automatically pull out the dummy wire AI, which is easy to wire, from the dummy isoiya storage device, send it out, and insert it through the ejection device. After 1. -11 minutes of automatic insertion and connection of the dummy isoiya, stop the wire electrode and store the wire electrode. Pull out the device 1p + and weld the tip to the side of the dummy wire. Zoshi-
C. As the dummy iso-ear is run, the wire electrode also runs along with it, and when it reaches the discharge device, it stops and cuts the dummy iso-iya, and then runs the dummy iso-iya with one wire electrode cut off, and then outputs the wire electrode. , completes the automatic insertion of the wire electrode.After that, move the vertical positioning guide, insertion means, nozzle, etc.
The workpiece is machined by running only the wire electrode, and when the process is finished, the wire electrode is cut, and the whole body is moved and taken out.

〔Example〕

The present invention will be explained based on the drawings that illustrate the invention.

In Figure 1, the bobbin that stores the dummy wire 1 is
A dummy isoia storage device 2 and a guide [1 to 3, for pulling out the dummy isoia 1 from the gummy wire N7 storage device 3 or applying tension to the tummy wire 1 by 1 to 5] tension center that controls the tension. A dummy wire wire storage and supply device consisting of a dummy wire wire storage and supply device 4 is shown, and a dummy wire wire 1 pulled out from the device is shown through a guide roller 3. 4 is fed to the cutting device 6 and the aca guide section 7 by the feeding device 5.
The insertion device is composed of the -y force guide 7 and the feeding device 5, and the structure of the approbe force guide 7 is as follows.
For example, the insertion path 71 of the dummy isoiya 1 and the insertion path 72 of the wire electrode 27 have a confluence point 73 in front of the insertion path, and the insertion path 71, 72 of the wire electrode 27 has a shape and depth formed to facilitate insertion. As shown in FIG. 3, it is only necessary to use a base 28 made of transparent lamic or synthetic resin to determine the insertion position and guide the wire N7. The wire electrode 21 is made of, for example, a tungsten wire with a wire diameter of about 0.05 ml, or even thinner, and has high toughness and rigidity.
n) <, r b, [Neu A7 electrode storage device 2
The wire electrode storage and supply device is composed of the wire electrode 0 and the tension applying device 30, and a wire electrode feeding device 5A and a cutting device 31 are provided between the wire electrode feeding device 5A and the abroach force guide 7. A welding device 8 for welding the wire electrode 27 to the dummy wire 1 is provided on the exit side of the approach force guide 7, and this welds the wire electrode 27 and the dummy wire 1 in a sandwiched state as shown in FIG. 2, for example. The electrodes 9, 9 having V grooves are connected to insulated piston rods 11, 11 and pistons 12, 12.
The dummy wire is moved and crimped using a hydraulic device consisting of cylinders 13 and 13, and has already been automatically inserted by supplying welding current between the electrodes 9 and 9 through the lead wire 10, and whose tip has reached the wire receiving device 26. 1 is temporarily stopped, and the vicinity of the tip of the wire electrode 27 sent out is welded and fixed to the side thereof. At this time, although not shown, the electrode 9 may be vibrated by a high-frequency vibration device, and an adhesive may be used to bond the wire electrode 27 to the dummy wire 1. Alternatively, the dummy wire 1 may be coated with a type of adhesive such as a low melting point alloy such as solder, and the tip of the wire electrode 27 may be wrapped around the side surface of the dummy wire 1, and that portion may be heated. Adhesive solvent can be supplied to make the adhesive adhere, or alternatively, for example,
．． As described in Japanese Patent Application No. 806, the wire electrode 27 may be wrapped around the dummy wire 71 and further tied or otherwise fixed mechanically. Also, it is recommended to provide a die, cutter, or grinder to remove the edges of the bonded portion. The conventionally used guide roller 3, energizing piece 14, upper guide 16, cutting device 17, and upper nozzle 18
, the workpiece 19, the lower nozzle 21, the lower guide 22, the guide roller 3, the belt roller 24 constituting the take-up and discharge device, and the take-up belt 25 to take up and discharge to the wire receiving device 26.

The workpiece 19 is attached to a processing table 20 fixed to a table (not shown), and the upper guide 16 and lower guide 22 are opened by an opening/closing device using a hydraulic device or the like when the dummy isoir 1 and the like pass through. There is.

The present invention uses a dummy wire 1 that is easy to wire through automatic operation and control, and automatically pulls it out from the dummy wire storage and supply device, feeds it out, and inserts it to a discharge device, automatically connects the dummy wire, and then stops the wire. The electrode 27 is pulled out from the wire electrode storage and supply device, and its tip is adhered to the side or the periphery of the dummy wire 1 by welding or the like. When the dummy wire 1 is run again, the wire electrode 27 also runs accordingly, and when the bonded end of the wire electrode 21 reaches the ejection wire receiver 26, or a detection signal from the detector 33 causes the dummy wire 1 to run. is stopped, the wire 1 is cut by the cutting device 6, and the drive of the pulling devices 24 and 25 is resumed, and the dummy wire 1 and the wire electrode 27 are pulled, and the cut rear end of the dummy wire 1 reaches the wire device 26. When it is detected by the detector 33, automatic insertion of the wire electrode 27 is completed. After that, the feeding device 5A is released and the tension applying device 3 is released.
0, closes the upper and lower guides 16.22 to position and guide the wire electrode 27 in a predetermined manner, and brings the energizing piece 14 into contact with the upper and lower nozzles 18.
The machining liquid is spouted from 21, and the workpiece is machined by running only the wire electrode 27 (13=) by the take-up device 24, 25, and when the machining is finished, the wire electrode 27 is cut by the cutting device 31, and after being discharged. , move and position the workpiece 19 to the next processing position, insert and connect the aforementioned dummy wire 171, bond and insert the wire electrode 27, cut and remove the wire 1,
Then, the process of wire-cut electrical discharge machining is repeated, and the workpiece 19 is not taken out after completion.

〔Effect of the invention〕

According to the present invention, after automatically threading and connecting a dummy wire that is easy to wire from the storage/supply device to the discharge device, the tip of the wire electrode is joined to the side of the dummy wire, and the dummy wire runs along with the dummy wire. Automatic insertion of thin wire electrodes in general, which was difficult to do automatically in the past, by making the insertion and connection possible
Wire-cut electrical discharge machining using thin wires has become possible, as it has high toughness and rigidity, and can also automatically thread and connect wire electrodes such as extremely thin tungsten wires. It has also become possible to automate the machine.

14

[Brief explanation of drawings]

Fig. 1 is a conceptual diagram of the present invention, Fig. 2 is a partial view in the direction of arrow A in Fig. 1, Fig. 3 is a view in the direction of arrow B in Fig. 1, and Fig. 4 is a diagram explaining the order of action. . 1・・・・・・・・・・・・・・・Gummy, Yummy 1゛12・・・・・・・・・・・・Gummy 1 no ear storage device 3...・・・・・・・・・・・・・・・Guide roller 4.30・・・・・・・・・・Z3 device with tension; 1,5△・・・・・・・・・・・・...Feeding device 6
．． 47.31... Cutting device 7...
・・・・・・・・・・・・Azo [1-Buka sword id 8
・・・・・・・・・・・・・・・Joining device 26...
・・・・・・・・・・・・Wire Uke 27・・・・・・
......Wire electrode 29...
・・・・・・・・・・・・A) Electrode storage ia neck attachment special
Forgive me! 'J one 2n

Claims (3)

[Claims] (1) In a method for automatically inserting and setting a wire electrode in wire-cut electrical discharge machining, a wire electrode for processing has a wire diameter and properties that allow automatic insertion and setting to be performed relatively easily in a wire-cut electrical discharge machine. A dummy wire that may be a dummy wire and an automatic insertion setting means for the dummy wire are provided, and when automatically inserting and setting a wire electrode having a diameter smaller than the dummy wire used for processing, the dummy wire is first automatically inserted and set, and the automatic insertion setting is completed. The tip of the wire electrode having the wire diameter is joined to the dummy wire on the feeding side, and then the dummy wire is run to set the dummy wire and the wire electrode in a set running state, and then the running is stopped, and the dummy wire is A method for automatically inserting and connecting a wire electrode, characterized in that the dummy wire and the wire electrode are made to run after being cut on the feeding side before the joining point, and the dummy wire is discharged from the running part. (2) A wire electrode of a predetermined wire diameter to be used for processing, a storage device, a tension applying device, and a feeding device for this wire electrode, and a dummy wire that may be a wire electrode for processing that has a larger wire diameter than this wire electrode. and a dummy wire storage device, a feeding device, a tension applying device provided as necessary, and the wire for cutting the dummy wire supplied from the dummy wire storage device to the workpiece using the wire electrode and the dummy wire storage and supply side. A cutting device that can also be used as an electrode cutting device, a feeding device that feeds the dummy wire to the cutting tip side and inserts it into a through hole (start hole) of the workpiece, and a wire electrode that connects the dummy wire to the workpiece. It is equipped with a joining device that joins wire electrodes and dummy wires on the storage and supply side, and a discharge device that discharges the dummy wires and wire electrodes after use. The dummy wire is drawn out from the storage device and sent out and automatically inserted into the through hole of the workpiece, the dummy wire that has reached the discharge device stops traveling, and the tip of the wire electrode supplied from the wire electrode storage device is attached to the wire by the bonding device. The dummy wire is joined, a dummy wire is run, and as the wire runs, a wire electrode is automatically inserted from the workpiece to the discharge device, the running is stopped, and then the dummy wire is cut, and then the wire electrode is run. A method for automatically inserting wire electrodes. (3) A workpiece that is made to face each other from a direction substantially perpendicular to the axial direction of the wire electrode while the wire electrode is updated and moved in the axial direction between a pair of upper and lower positioning guides arranged at intervals in the substantially vertical direction. Machining is performed by electrical discharge by applying a voltage pulse under the presence of machining fluid sprayed from a nozzle.A wire electrode of a predetermined wire diameter to be used for machining,
A storage device, a tensioning device, and a feeding device for this wire electrode, a dummy wire that may be a wire electrode for processing with a wire diameter larger than that of this wire electrode, a storage device, a feeding device, and a feeding device for this dummy wire, and as necessary. a tensioning device provided at the dummy wire storage device, a cutting device capable of serving as a wire electrode cutting device that cuts the dummy wire supplied from the dummy wire storage device to the workpiece on the wire electrode and dummy wire storage and supply side, and the dummy wire. the feeding device that feeds the wire to the cutting tip side and inserts it into the through hole (start hole) of the workpiece; and the joining device that joins the wire electrode to the dummy wire on the storage and supply side of the wire electrode and dummy wire to the workpiece. , a discharge device for discharging the dummy wire and wire electrode after use, and further controlling the respective operations of the tension applying device, the feeding device, the cutting device, the joining device, the discharge device, and the opening/closing means of the upper and lower guides. A wire-cut electrical discharge machining device that is equipped with a control device and automatically inserts a wire electrode.