JPS61226227A - Wire guide mechanism - Google Patents

Abstract

PURPOSE:To enable a wire to feed smoothly in such a condition that the wire is inclined at an arbitrary angle, by rotatably providing a guide member through which a wire pierces, and by providing a guide pulley to this guide member. CONSTITUTION:A guide member 3 having guide holes is rotatably coupled to one end part of an arm 1 through the intermediary of a stepping motor 5 which rotates the guide member 3 in the direction of the arrow 4. A guide pulley 8 journalled to the front end which is curved in the right angle direction is provided onto a support shaft 7 which is planted perpendicularly to one principle surface 6 of the guide member 3. Since the feed direction 16 of a wire W is substantially the same direction as that of the guide holes 2, 2, the wire W is smoothly guided along the feed direction 16 by the guide pulleys 8, 8 without interfering with the guide members 3, 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a wire guide mechanism in a wire discharge machine.

[Technical background of the invention and its problems]

In the conventional wire discharge machine, as shown in Fig. 6, the upper guide (C) and lower guide (D) that guide the wire (A) in the direction of the arrow (B) are tapered (not shown). The device positions the wire (A) so that it is inclined at a predetermined angle θ, as shown by the imaginary line. Such an inclination of the wire (A) is necessary, for example, when creating a draft angle on gold.

However, conventionally, when the inclination angle θ is set to 30 degrees or more, the wire (A) is attached to the opening edge of the guide hole (E).
) is pressed too hard, causing the wire (A) to break or become severely abraded. Therefore, there is a problem in that the taper angle cannot be increased.

[Purpose of the invention]

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a wire guide mechanism that can tilt a wire in a range from the vertical direction to the horizontal direction.

[Summary of the invention]

A guide body with a guide hole through which the wire is inserted is rotatably attached to a rod-shaped arm, and a guide pulley is attached to this guide body to smoothly guide and feed the wire along the guide hole. Melt.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

Figures 1 and 2 show the wire guide mechanism (G
) is shown. This wire guide mechanism (G) includes a rod-shaped arm (1) having a rectangular cross section, and a guide body (3) having a guide hole (2) rotatably connected to one end of the arm (1). , a stepping motor (5) that is installed inside the connecting portion of the arm (1) and the guide body (3) and rotates the guide body (3) by a predetermined amount in the direction of the arrow (4), and one of the guide bodies (3). A support shaft (7) vertically erected on the main surface (6) of the support shaft (7), a guide pulley (8) pivotally supported at the end bent at right angles to the support shaft (7), and a guide The arm (1
) is supported by a support mechanism (not shown) that drives this arm +1) in three dimensions. On the other hand, the guide body (3) has a die part α made of diamond or diamond which forms a guide hole (2) whose axial direction is perpendicular to the main surface (6), and this die part (9). It consists of a holding main body (Ll). The main surface (6) and the axis of rotation of the guide body (3) are parallel to each other.

Then, the hollow part of the liquid supply pipe (9) communicates with the C1 guide hole (2), so that machining liquid can be introduced into the guide hole (2). Further, the support shaft (7) has its axis (7a
) is the axis of rotation, and the main body α is rotatable in the direction of arrow (i3).
It is planted in 1. Further, a guide groove U3 having an inverted trapezoidal cross section is carved on the outer peripheral surface of the guide pulley (8), so that the guide pulley (8) rotates around an axis I parallel to the main surface (6). The guide pulley (8) is set so that the wire (W) inserted through the guide hole (2) slides in contact with the guide groove and is fed. Further, the stepping motor (5) is connected to the NC (Nam) of the wire cut electric discharge machine.
It is caused to rotate by a predetermined amount by a control signal from the control device.

Therefore, the wire guide machine 5 (G), CG) with the above configuration
As shown in FIG. 3, the pair of principal surfaces (6) and (6) are arranged vertically symmetrically so that their back surfaces face each other. Then, insert the wire (W) into the guide holes (2) and (2).
) is passed through and then stretched. However, in order to set the angle of inclination with respect to the vertical line (V) at the processing site of the C1 wire < W) to θ, first, the arms (1) and (1) are positioned based on a control signal from the NC device.

Next, start the stepping motor (5) and move the main surface (6
).

The guide bodies (3) and (3) are rotated to a position where (6) is almost orthogonal to the feeding direction tta of the wire (W). The hidden C1 wire (W) follows this feeding direction tLl19
is tilted by the angle θ.
).

At this time, the feeding direction aO of the wire (W) and the guide hole (2
).

(2) and are in almost the same direction, the wire (W) does not interfere with the guide body +3) and (3), and the wire (W) is smoothly moved along the feeding direction μe by the guide pulleys 18) and (8). will be guided to. Therefore, the wire (W) is in the guide hole (2).

(2) The wire (W) runs smoothly along the wire (W), and the wire (W) does not break or wear excessively. Moreover, even when the inclination angle θ of the wire (W) is 90 degrees (horizontal direction), it is possible to run the wire (W) smoothly without interfering with t- and the guide bodies (3) and +3). can.

(While energizing the C1 wire (W) and workpiece (M), feed the C1 machining liquid through the guide hole (2) through the liquid supply pipe +9) and +91.

(2), and further, the workpiece CM) is
By feeding with a Y table, a tapered surface with an arbitrary taper angle can be formed. At this time, the guide body (
By changing the inclination angles of 3) and +3) within the range of 0 degrees to 90 degrees, not only taper machining but also complete three-dimensional wire electrical discharge machining becomes possible.

In this way, the wire guide mechanism (G) of this embodiment can incline the wire (W) at an arbitrary angle without causing interference between the wire (W) and the guide body (2), and can smoothly feed the wire (W). can be guided to. As a result, the flexibility of wire-cut electrical discharge machining increases, making it possible to machine shapes that were previously impossible.

In addition, in the above-mentioned Example 2, the support shaft (7) is indicated by the arrow 11.
It is rotatable in the direction of rotation, but may be fixed.

Furthermore, as shown in Figures 4 and 5, there is a guide!
j<8) Alternatively, guide pulleys (8') having the same structure may be arranged opposite to the guide pulley (8) and staggered to guide the wire (W) so as to sandwich it therebetween. In this case, the guiding effect of the wire (W) will be even better.

〔Effect of the invention〕

The wire guide mechanism of the present invention can smoothly feed the wire in a state where the wire is inclined at an arbitrary angle. As a result, there is no restriction on the inclination angle of the wire, and the flexibility of wire-cut electrical discharge machining is increased. Therefore, it becomes possible to perform complete three-dimensional processing, which was previously impossible, and to process objects into more complex shapes.

[Brief explanation of the drawing]

FIG. 1 is a front view of a wire guide mechanism according to an embodiment of the present invention;
FIG. 2 is a side view, FIG. 3 is a diagram showing how to use a wire guide mechanism according to an embodiment of the present invention, and FIGS. 4 and 5 are front views of the wire guide mechanism according to an embodiment of the present invention. and a side view. FIG. 6 is an explanatory diagram of the drawbacks of the prior art. (1): Arm, (2) Ni guide hole, (3) Ni guide body. (5) Varnish chipping motor (rotary drive body). (8) Two-guide pulley, (W): Wire. Agent Patent Attorney Noriyuki Chika (and 1 other person) Figure 1 15 Figure 2 Figure 3 Figure 6 Figure 4 Figure 5

Claims (1)

[Claims] a rod-shaped arm; a guide body connected to one end of the arm so as to be rotatable around an axis substantially perpendicular to the longitudinal direction of the arm and having a guide hole through which a wire is inserted;
A rotary drive body attached to the arm rotates the guide body and holds it in a predetermined position, and a rotary drive body is rotatably attached to the guide body and controls the feeding of the wire inserted into the guide hole along the axis of the guide hole. A wire guide mechanism characterized by comprising a guide pulley that guides the wire along a direction.