JPH07178660A - Wire guide device - Google Patents

Abstract

PURPOSE:To facilitate continuous follow-up control of a traverser table and to simplify a constitution so as to reduce a number of expendable part items. CONSTITUTION:In a wire guide device 1, it comprises a rotary shaft 7 swivelable in the axial direction of a reel 4, swing roller 8 rotatably provided in this rotary shaft 7 to wind around a wire 2 separated from the reel 4 and an angle detector 9 for detecting a swivel angle theta of this swing roller 8. The device is provided with a traverser table 5 capable of following up to moving a position coming into contact with and separating from the wire 2 by mounting these angle detector 9, rotary shaft 7 and the swing roller 8, drive means 6 for driving this traverser table 5 and a control part 10 for controlling this drive means 6 based on a detection signal from the angle detector 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a wire saw,
Wire guide device for feeding or winding wire in a direction perpendicular to the axial direction of the reel

[0002]

2. Description of the Related Art In a conventional wire guide device, when a wire is unwound from an aligned winding reel, passes between a pair of touch rollers, and is fed to a groove roller side via a guide roller,
The structure is such that the contact of the wire with the touch roller is electrically detected, the motor is controlled based on this detection signal, and the traverser table follows the movement of the contact / separation position of the wire.

[0003]

However, in the wire guide device, since the touch roller has an indispensable structure, there is a problem that the structure is complicated and the number of consumable parts increases. Further, the contact detection by the touch roller is discontinuous, and moreover, the touch roller rotates even when it is out of contact due to inertia, so that there is a control drawback that continuous follow-up control of the traverser table is difficult.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to facilitate continuous follow-up control of a traverser table in a wire guide device for a wire saw of this type, simplify the structure, and reduce the number of consumable parts.

[0005]

According to the present invention, there is provided a rotating shaft which intersects the axial direction of a reel at a right angle, a swing roller which is rotatably provided on the rotating shaft, and which winds a wire apart from the reel, and a swing roller. An angle detector that detects a swing angle of a roller, a traverser table that is equipped with the rotating shaft, a swing roller, and an angle detector and that can follow movement of a wire contacting / separating position, and driving means that drives the traverser table. And a control unit that controls the drive means based on a detection signal from the angle detector.

When the contact / separation position of the wire moves on the reel side during swinging / winding of the wire and the swing roller swings, the angle detector detects the swing angle of the swing roller and outputs the signal to the controller. Send to. The control unit controls the driving unit so that the deviation between the swing angle from the angle detector and the reference swing angle becomes zero. As a result, the traverser table moves in the axial direction of the reel, following the change in the contact / separation position of the wire. Therefore, the wire is fed or wound in the direction perpendicular to the axial direction of the reel. in this way,
Since the swing angle of the swing roller can be constantly detected by the angle detector, continuous follow-up control of the traverser table can be facilitated. Moreover, since the conventional touch roller can be eliminated, the structure can be simplified and the number of consumable parts can be reduced.

[0007]

[Embodiment 1] As shown in FIG. 1, a wire guide device 1 according to the present embodiment 1 is incorporated in a wire saw and a wire 2
Wire from reel 4 (send out) or wire 2
It is used for winding up the reel 4 on the reel 4, and includes a rotating shaft 7, a swing roller 8, an angle detector 9, a traverser table 5, a driving unit 6, and a control unit 10.

The rotary shaft 7 intersects the axial direction of the reel 4 at a right angle and extends in the vertical direction. A swing roller 8 with a groove is rotatably provided on the upper end of the rotary shaft 7 via a roller shaft 16. The swing roller 8 winds the wire 2 separated from the reel 4. An angle detector 9 is directly connected to the lower end of the rotary shaft 7 to detect the swing angle θ of the swing roller 8. The traverser table 5 is provided on a guide frame (not shown) so as to be movable in the axial direction of the reel 4. The traverser table 5 has an angle detector 9, a rotary shaft 7 and a swing roller 8 mounted thereon, and a contacting wire 2 attached thereto. It is possible to follow the movement of the separated position.

The driving means 6 is a traverser table 5
In order to drive the motor, a motor 11 with a speed reducer and a feed screw unit 12 that converts the rotation of the motor 11 into a linear motion are provided. The control unit 10 controls the rotation amount of the motor 11 so that the swing angle θ from the angle detector 9 becomes zero, and also controls the rotation direction of the motor 11. A grooved guide roller 13 is provided on the traverser table 5. The guide roller 13 directs the direction of the wire 2 from the swing roller 8 to the cutting action position onto the rotary shaft 7, and the tension of the wire 2 causes the rotary shaft to rotate. This is required so as not to generate rocking torque at 7.

Next, the operation of the first embodiment will be described. When the contacting / separating position of the wire 2 with respect to the reel 4 moves in the direction of arrow A in FIG. 1 while the wire 2 is being fed, and becomes faster than the movement of the swing roller 8 on the traverser table 5 running at the basic speed, the swing roller 8 Oscillates in the direction of arrow A by the oscillating torque generated in the groove by the caster principle. The swing angle + θ at this time is calculated by the angle detector 9
And is sent to the control unit 10. Control unit 10
Causes the traverser table 5 to accelerate by increasing the number of rotations (speed) of the motor 11 so that the swing angle + θ becomes zero.

When the swing roller 8 has a direction opposite to the direction of arrow A, that is, a swing angle of -.theta., The rotation speed (speed) of the motor 11 goes through the same operation as in the case of swing in the direction of arrow A.
Is lowered, and the traverser table 5 is decelerated. Due to such acceleration and deceleration, the traverser table 5 follows the movement of the contact / separation position of the wire 2, the swing roller 8 is held in a state perpendicular to the axial direction of the reel 4, and the wire 2 is aligned with the axis of the reel 4. On the other hand, the line is broken while keeping a right angle. In the case of winding the wire 2, the wire 2 is wound in the direction perpendicular to the axial direction of the reel 4 through the same operation as in the case of the feeding.

As described above, since the swing angle θ of the swing roller 8 can always be detected by the angle detector 9, continuous follow-up control of the traverser table 5 can be facilitated.
Further, since the conventional touch roller can be eliminated, the structure can be simplified and the number of consumable parts can be reduced.

[0013]

[Embodiment 2] As shown in FIG.
A roller shaft 16 is provided on the upper end of the rotary shaft 7 via an arm 3, and a swing roller 8 is rotatably attached to the roller shaft 16 to increase the swing torque according to the caster principle by the distance L between the roller shaft 16 and the rotary shaft 7. The swing roller 8 is structured to swing reliably.

[0014]

Other Embodiments In the above embodiment, the rotation of the motor 11 can be converted into the linear movement of the traverser table 5 by the engagement of the rack and the pinion. Further, the traverser table 5 can be locked to the timing belt wound between the driving pulley and the driven pulley to convert the rotation of the motor 11 into the linear movement of the traverser table 5. Further, a piston cylinder or a linear motor can be provided as the driving means 6.

[0015]

As is apparent from the above description, according to the present invention, the following effects can be obtained. That is, since the angle detector can always detect the swing angle of the swing roller, the continuous follow-up control of the traverser table can be facilitated. Moreover, since the conventional touch roller can be eliminated, the structure can be simplified and the number of consumable parts can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a wire guide device according to a first embodiment.

FIG. 2 is a perspective view showing a swing roller mounting structure according to a second embodiment.

[Explanation of symbols]

 1 wire guide device (Example 1) 2 wire 3 arm 4 reel 5 traverser table 6 driving means 7 rotating shaft 8 swing roller 9 angle detector 10 control unit 11 motor 12 feed screw unit 13 guide roller 16 roller shaft A arrow L roller Distance between shaft and rotation axis θ Swing angle

Claims (1)

[Claims] 1. A rotating shaft (7) intersecting the axial direction of the reel (4) at a right angle, and a wire (2) rotatably provided on the rotating shaft (7) and separated from the reel (4). The swing roller (8) to be applied, the angle detector (9) for detecting the swing angle (θ) of the swing roller (8), the rotary shaft (7), the swing roller (8) and the angle detector (9). ) Is mounted on the traverser table (5) capable of following the movement of the contact / separation position of the wire (2), a driving means (6) for driving the traverser table (5), and an angle of the driving means (6). A wire guide device (1) comprising: a control unit (10) for controlling based on a detection signal from a detector (9).