JPS61164727A - Fine wire supporting bearing - Google Patents

Abstract

PURPOSE:To make available a smooth and stable fine wire bearing guide by guiding a fine wire as magnetically adsorbed on a concave guide surface in the supporting bearing of a travelling fine wire such as a wire electrode for a wire cut electric discharge machine. CONSTITUTION:A wire electrode 1 is supplied from a reel not shown herein, and travels in an arrow mark direction through a roller guide 2 and upper and lower guides 3 and 4. The wire 1 between the guides 2 and 3 moves in a state of straight line as tensioned to a predetermined level and a workpiece is processed as opposed thereto. It is necessary, therefore, for the wire electrode 1 to travel smoothly in good contact with the guides 3 and 4. Thus, the guides 3 and 4 have a separated center portion, and separated portions 31 and 32 are magnetized to N and S poles by an exciting coil or a permanent magnet. The, the wire 1 as magnetic is adsorbed into the V-grooves of the guides 3 and 4 for its proper guide.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is directed to a wire electrode for wire-cut electric discharge machining, a thin wire electrode for small-hole electric discharge machining, a contact needle for measurement, and other moving fine wires in a movable state without any play. Concerning support bearings that provide stable guidance.

[Prior art and problems]

Conventionally, in order to support a wire electrode in a wire-cut electric discharge machining in a movable state, it is known to support the wire electrode by applying fluid pressure or suction pressure to the groove guide. However, the diameter of the wire used is as small as about 0.05 to 0.3 vnφ, so even if suction pressure of air or the like is applied to it, stable pressure cannot always be applied, resulting in photographing. Further, when the wire electrode is replaced with a wire electrode having a different wire diameter, the position of the wire within the groove of the guide changes, making it impossible to apply a predetermined suction pressure.

[Means for solving problems]

The present invention has been made in order to improve such drawbacks, and is composed of a guide having a recess that movably guides the thin wire in the axial direction, and a magnet that magnetically attracts the thin wire to the guide surface of the recessed portion of the guide. It is characterized by what it did.

The invention will be explained below by way of a illustrative example in the drawings.

Fig. 1 shows an example of a wire-cut electric discharge machining device, in which 7 electrodes 1 are supplied from a reel (not shown), and roller guides 2
It passes between the upper and lower guides 3 and 4, and travels in the direction of the arrow. The wire 1 between the guides 2 and 3 moves in a straight line with a predetermined tension, and the workpiece is machined facing it, so it firmly contacts the guide 3.4 and guides it smoothly without play. It is necessary to do so. Also, Fig. 2 shows an application of the measuring instrument, in which the tip of the measuring needle 5 is brought into contact with the surface of the object to be measured, and the position and distance are determined by measuring the amount of movement of the stylus 5 while detecting the contact using energization detection, etc. The stylus 5 moves in the direction of the arrow to perform measurements, but the guide 6 guides it to avoid wobbling.

Fig. 3 is a top view of the guides 3, 4.6, and shows that the groove guide 3 is separated at the center, and the 1-separated portion 31.32 is magnetized to N-3 poles by an excitation coil or permanent magnet (not shown). The strength of the magnetic field attracts the wire 1, which is a magnetic material, to the groove and guides it. If the wire 1 is not a magnetic material, a magnetic piece 7 that presses the wire 1 is provided as shown in FIG. 4, and by magnetically attracting it, the wire 1 is
! All you have to do is contact it. Of course, the magnetic piece 7 may be a magnet,
A magnet of different polarity or a magnetic material of different polarity may be provided on the guide 3 side to attract the guide 3 .

Note that the guide groove is not limited to a V-shape, but can also be formed into a U-shape, trapezoid, or any other shape of recess, and can be integrated into the parts 31 and 32 without having to be separated into parts 31 and 32 as shown in FIGS. 3 and 4. It can also be formed into

(Effects of the Invention) As described above, the present invention guides wire cut wire electrodes, pipe electrodes for small hole electrical discharge machining, measuring probes, and other thin wires by magnetically attracting them to the guide surface of the recess. Because it is stably attracted and held on the guide surface, stable bearing support without play is possible, and because the adsorption magnetic force can be easily adjusted and controlled, smooth bearing guidance is always possible without impairing the axial movement of the thin wire. be. In addition, since magnetic attraction is used, stable attraction and stable support can be achieved even if the wire diameters of the thin wires are different. According to the invention, therefore:
Smooth guide support is possible without rattling, so in wire cutting, it is possible to machine a product with a uniform depth and width at high speed with stable electrical discharge, and in small hole electrical discharge machining, it is possible to machine a product with a high degree of roundness and depth. Holes can be machined, the diameter of the holes can be selected arbitrarily, and the accuracy of measurement of positions, distances, etc. can be improved.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of a part thereof. 1...Wire electrode 3.4. ......Guide 5...Stylus patent applicant Inoue Japax Research Institute Representative Inoue Kiyosetsu Stomach Procedural Amendment (Oshiki)) Showa 60 years 5. A 6 Day 2, Name of the invention Thin line support bearing 3, Person making the amendment 4, Date of amendment order April 30, 1985 5, Increased loss of the invention due to the amendment "0" 6 Subject of the amendment Drawings of the specification Simple explanation of Kusunoki 7, contents of correction
As shown in the attached sheet, (1) A brief explanation of the drawings on page 4, lines 19-20 of the specification:
The figure is a perspective view of the structure of a different embodiment, and FIGS. 3 and 4 are front views of different structures of the guide portion of FIGS. 1 and 2. Correct it with J.

Claims (1)

[Claims] A thin wire support bearing comprising a guide having a recess for movably guiding the thin wire in the axial direction, and a magnet for magnetically attracting the thin wire to the recessed guide surface of the guide.