JPH052830U - Wire guide device for wire cut electric discharge machine - Google Patents

Abstract

(57) [Summary] [Purpose] With the increase in precision of wire electric discharge machines, wire electrodes have become smaller in diameter, and ultrafine wires with a diameter of 50 microns have come to be used. The extra-fine wire has a small spring property, and when it gets wet with water, it may wind around the feeding roller and become inoperable. In order to solve this, it aims at obtaining a wire guide device. [Structure] Wire electrode 1 sent from feeding roller B
Was configured to be randomly stored in the box through the wire guide device. In the wire guide device, water was press-fitted from both sides by a pressure pump, and the wire electrode was discharged into the box together with water from the groove in the guide. [Effect] Since the wire electrode is stably discharged without being wound around the feeding roller and is housed in the box, the operation time of the wire electric discharge machine is extended.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wire guide device which prevents a wire from being wound around a feeding roller when an ultrafine wire is used as a wire electrode.

[0002]

[Prior Art]

 FIG. 3 is a schematic view showing the configuration of a conventional wire cut electric discharge machine, and FIG. 4 is an enlarged sectional view showing a main part of the wire cut electric discharge machine shown in FIG. In the figure, reference numeral 1 denotes a wire electrode 3 fed from a supply bobbin 2, which is directly connected to an electromagnetic brake 3a, and which applies a predetermined tension to the wire electrode 1, and 4a, 4b and 4c respectively change the traveling direction of the wire electrode 1. It is an idler.

Reference numeral 5 is an upper guide, and lower guide 6 is arranged inside each of a nozzle 7 that ejects an upper processing liquid and a nozzle 8 that ejects a lower processing liquid. Reference numeral 9 is a working fluid supply pump for supplying the working fluid to the nozzles 7 and 8. The wire electrode 1 is supported by an upper guide 5 and a lower guide 6, and is made to face the work piece 12 in a predetermined direction. Reference numeral 11 is a pulse power source for generating an electric discharge between the wire electrode 1 and the workpiece 12, and 13a and 13b are feed rollers for the wire electrode 1 which sandwich the wire electrode 1 from both sides and wind it at a predetermined speed. Is. Reference numeral 14 is a device for feeding the wire electrode 1 by water pressure or air.

Next, the operation of the conventional wire cut electric discharge machine as described above will be described. First, a pulse voltage is applied from the pulse power source 11 between the wire electrode 1 and the workpiece 12 while jetting the machining liquid 10 coaxially with the wire electrode 1 from the nozzles 7 and 8. In the minute gap where the wire electrode 1 and the work piece 12 face each other, electric discharge is repeated using the working liquid 10 as a medium, and the work piece 12 is melted and scattered by the thermal energy at the time of electric discharge. The machining powder (not shown) is discharged out of the machining groove along with the flow of the machining liquid 10. Further, the relative movement between the wire electrode 1 and the work piece 12 for continuously performing the discharge by keeping the minute gap between the wire electrode 1 and the work piece 12 constant at all times is not shown in the figure. It is usually performed by a method of numerically controlling the Y table. In this way, by repeatedly performing electric discharge and controlling the XY table, it is possible to continuously form the processing grooves and process the workpiece into an arbitrary shape.

The machining is continuously carried out, and the wire electrode 1 which has completed the machining process is pulled out by the feeding rollers 13a and 13b through the wire feeding device 14 shown in FIG. 4 and randomly housed in the box 16. To be done.

[0006]

[Problems to be solved by the device]

 When the wire electrode 1 is thick (usually Φ0.3 mm) in the feeding rollers 13a and 13b as described above, it can be arbitrarily placed in the box 16 without being wound around the feeding roller, but in the case of an ultrafine wire (eg Φ50 μm). (Below) The tension of the wire electrode 1 was weak, and the viscosity of the water discharged from the wire feeding device adhered to the feeding roller 13a and wound up as it was.

The present invention has been made to solve the above problems, and a wire-cut electric discharge machine capable of preventing a wire electrode from being wound around a feeding roller and stably storing the wire electrode in a box. The purpose is to obtain a wire guide device.

[0008]

[Means for Solving the Problems]

 A wire guide device of a wire cut electric discharge machine according to the present invention is provided with a mechanism in which a wire electrode is drawn into a guide after being pulled by a feed roller and is fed by water pressure entering from an elbow. ..

[0009]

[Action]

 The wire guide device of the wire cut electric discharge machine according to the present invention allows the wire electrode to be drawn into the guide after being pulled out by the feeding roller and to be expelled to the outside by the water pressure in the guide. It was done.

[0010]

【Example】

 Example 1. 1 and 2 are sectional views showing, in an enlarged manner, essential parts of a wire designing device of a wire-cut electric discharge machine according to an embodiment of the present invention. The same or corresponding parts to those in FIG. Is displayed

The configuration of an embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 is a wire electrode, 13a and 13b are feeding rollers, 14 is a wire feeding device, 17 is a guide, and 18a and 18b are elbows provided on both sides of the guide 17 for supplying water, and a pressurizing pump (not shown). No.) and a tube (not shown). Numerals 19a and 19b are sideways, and water 20 supplied from the elbows 18a and 18b is a groove, and the water 21 and the wire electrode 1 press-fitted from the sideways 19a and 19b are discharged through the groove 20 to the outside. A cover 15 is provided to prevent the water 21 discharged from the groove 20 from splashing to the outside. A box 16 is a receiving box for temporarily storing the water 21 discharged from the groove 20 and the wire electrode 1.

FIG. 1 is a side view of the wire guide device, and FIG. 2 is a cross-sectional view seen from the upper side. Next, the operation will be described. First, the delivery device 14 is a device that delivers the wire electrode 1 to the feed rollers 13a and 13b by air or water pressure. The wire electrode 1 reaching the feeding roller is sandwiched by the feeding rollers 13a and 13b, further pulled out by the rotation of the rollers, and guided into the guide 17. A groove 20 through which the water 21 and the wire electrode 1 pass is formed in the guide 17, and the water guided from the elbows 18a and 18b on both sides is jetted into the groove 20 vigorously through the side roads 19a and 19b. Due to the water pressure, the wire electrode 1 naturally falls in the box 16 together with the water 21 and is housed in the box.

The water in the box is introduced into another water tank (not shown), and then, via a pressure pump (not shown), tubes (not shown) are attached to the pressure pump and the elbows 18a and 18b on both sides. ) And is circulated.

Example 2. In the present embodiment, the water 21 is sent from the elbows 18a, 18b through the sideways 19a, 19b to the groove 20 in the guide 17 by the pressure pump, but air may be passed through, and the wire electrode 1 may be sent together with the air by the pressure of the air. It may be discharged, and the same effect as that of the above-mentioned embodiment is obtained.

[0015]

[Effect of the device]

 As described above, this invention is a wire guide device for a wire-cut electric discharge machine. Since the wire feeding roller is provided, it is possible to prevent the wire electrode from being wound around the feeding roller.

[Brief description of drawings]

FIG. 1 is an enlarged sectional side view of a main part of a wire guide device of a wire cut electric discharge machine according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG. 1 seen from above according to an embodiment of the present invention.

FIG. 3 is a schematic diagram showing a configuration of a conventional wire cut electric discharge machine.

FIG. 4 is an enlarged sectional side view of a main part of the conventional wire cut electric discharge machine shown in FIG.

[Explanation of symbols]

 1 Wire Electrode 2 Supply Bobbin 3 Brake 4 Idler 5 Upper Guide 6 Lower Guide 7 Nozzle 8 Nozzle 9 Machining Fluid Supply Pump 10 Machining Fluid 11 Pulse Power Supply 12 Workpiece 13 Feeding Roller 14 Wire Feeding Device 15 Cover 16 Box 17 Guide 18 Elbow 19 Side road 20 Groove 21 Water

Claims (1)

[Claims for utility model registration] [Claim 1] In a wire-cut electric discharge machine, an ultrafine wire used as a wire electrode passes through a guide after passing a feeding roller, and is also exposed to the outside by water pressure entering from an elbow. A wire guide device for a wire cut electric discharge machine, which is characterized by being guided.