JPH11291154A - Wire driver in wire saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire driver which can prevent a wire from being cut due to excessive tension in a wire saw for cutting a work to be cut with a running wire. SOLUTION: A wire feed part 3 and a wire recovering part 4 in a wire saw are formed out of a driving roller 10 rotating at a fixed position, and a reel 11 capable of pressure contact with the rotating driving roller 10. The reel 11 is rotated at a frictional force generated when the reel 11 is brought into pressure contact with the rotating driving roller 10 to deliver and wind a wire B. If excessive tension is applied to the wire B, tension is relieved by the slipping motion of the reel 11, thereby preventing disconnection of the wire B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire driving apparatus for a wire saw for cutting a workpiece to be cut into a large number of thin pieces at the same time by using a running wire so as to prevent the occurrence of breakage of the wire running at a high speed. ,
More particularly, the present invention relates to a structure of a wire supply unit and a wire recovery unit that eliminates excessive tension of a wire at a part where the wire is fed and wound and prevents disconnection.

[0002]

2. Description of the Related Art As is conventionally known, a wire saw for simultaneously cutting a large number of thin pieces with a wire in which a workpiece to be cut is run at a high speed is fed out from a reel of a wire supply unit to collect a wire. In the middle of the movement of one wire wound on the reel of the section, a cutting section formed by arranging the wires in parallel so as to run in the same direction between a plurality of multi-groove rollers is provided, and the cutting section travels. By pressing a workpiece to be cut against a wire, a structure is formed in which multiple thin pieces are cut simultaneously.

[0003] In such a wire saw, in order to obtain efficient cutting, the tension of the wire must be maintained in an appropriate range until the unwound wire is wound up. Excessive tension can cause breaks.

The wire supply unit and the wire recovery unit in a conventional wire saw have a structure in which a reel for feeding or winding a wire is fixed to a rotating shaft, the rotating shaft is directly connected to a motor, and the motor directly rotates the reel. Had become.

[0005]

By the way, like the above-mentioned conventional wire supply unit and wire recovery unit,
In the structure in which the reel is directly rotated by the motor, the wire feeding speed of the wire feeding unit and the wire winding speed of the wire collecting unit must be precisely synchronized.However, this tuning operation is very difficult. Since the speed and the wire winding speed do not match, excessive tension is applied to the traveling wire, and therefore, there is a problem that the wire often breaks.

Therefore, an object of the present invention is to make the rotation of the reels of the wire supply unit and the wire recovery unit an indirect drive by friction, release the difference between the wire feeding speed and the winding speed by slipping, and cause the running wire to have an excessive speed. An object of the present invention is to provide a wire driving device in a wire saw that can reliably prevent occurrence of wire breakage without applying tension.

[0007]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a plurality of multi-grooves during the movement of a wire fed from a wire supply unit and wound up by a wire collection unit. In a wire saw provided with a cut portion formed by arranging wires in parallel so as to run in the same direction between rollers, each of the wire supply portion and the wire collection portion is a rotary drive drum, This arrangement employs a configuration in which a press-contactable approach and a reciprocal movement are freely arranged, and a reel is used to feed or wind the wire, and the rotation of the rotary drive drum is transmitted to the reel by a press-contact frictional force.

According to a second aspect of the present invention, in the first aspect of the invention, the outer peripheral surface of the rotary drive drum that is driven to rotate at a fixed position is formed of a friction-resistant member, and the reel is disposed at a position close to the rotary drive drum. A rotary drive that is rotatably pivotally attached to the tip of the swinging arm in a state parallel to the rotary drive drum, and presses and separates the reel against the rotary drive drum with the rotary shaft to which the swing arm is fixed. It adopts a configuration linked to the machine.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a wire saw, and FIG. 2 is a longitudinal side view. In FIG.
The vertical substrate 2 has a wire supply unit 3 and a wire recovery unit 4 at both lower positions, a cutting unit 5 at a substantially central position, and wires located at both sides of the cutting unit 5. The tension urging units 6 and 6 and the traverse mechanisms 7 and 7 and a group of guide rollers 8 are provided at an upper position, and an attachment unit 9 for the workpiece A to be cut is installed immediately below the cutting unit 5. .

The wire B fed from the wire supply unit 3 passes through the traverse mechanism 7, the guide roller 8, and the wire tension urging unit 6 to the cutting unit 5, where it is cut.
Is passed through the wire tension urging unit 6 and the traverse mechanism 7 and wound up by the wire collecting unit 4.

The wire supply unit 3 and the wire recovery unit 4
Have the same structure, and the operation of feeding and winding the wire is only reverse. Therefore, the structure of the wire supply unit 3 will be described, and the description of the wire collection unit 4 will be omitted by attaching the same reference numerals to the same parts.

As shown in FIGS. 1 to 3, the wire supply unit 3 includes a driving drum 10 which rotates at a fixed position, and a wire feeding unit which can press and contact with the drum 10 and which can freely move toward and away from the drum. The drive drum 10 has a horizontal shaft 1 fixed to the vertical substrate 2 so as to protrude toward the front surface, which is the left side of FIG.
2 is rotatably supported via a bearing 13, and the outer peripheral surface of the drive drum 10 is formed of a friction-resistant member 14 such as silicon rubber.

The internal gear 1 is provided on the inner peripheral surface of the drive drum 10.
5, a gear 18 meshing with the internal gear 15 is fixed to the tip of a shaft 17 supported through a bearing 16 so as to penetrate the vertical substrate 2 back and forth, and a bracket 19 provided on the rear surface side of the vertical substrate 2 The servo motor 20 is fixed to the
0 and the shaft 17 are connected via a coupling 21, and the drive drum 10 is rotated by the activation of the servomotor 20. The drive drum 10 may be driven by directly connecting the servomotor 20 to the shaft 17.

A rotary shaft 22 that horizontally penetrates the vertical substrate 2 is attached to a side position of the drive drum 10 by a bearing 23, and a pair of arms 24 is provided at a portion of the rotary shaft 22 protruding from the front side of the vertical substrate 2. , 24, and this arm 2
The reel 11 is supported so that it can be freely attached and detached and rotated between the ends of the reels 4 and 24, and the rear end of the rotating shaft 22 and a hydraulic rotary cylinder 25 installed on the base plate 1 are connected via a coupling 26, Rotating shaft 22 by starting rotating cylinder 25
With the rotation of, the arms 24 swing, and the reel 11 approaches or separates from the drive drum 10.

A pin 2 is attached to one end of each of the arms 24, 24.
7 is rotatably supported, and a movable holder 28 is provided at the other end.
The movable holder 28 is provided with an operating rod 30, and the movable holder 28 is provided with a pin 29.
9 urges the elasticity of movement to the forward position, and both pins 27 and 29
To support the reel 11 so as to rotate.

As shown in FIG. 3, the reel 11 is supported in parallel with the drive drum 10,
When the wire B is moved closer to the drive drum 10 side at 5, the wire B wound around the outer circumference presses only the drive drum 10 against the peripheral surface, and the rotation of the drive drum 10 is transmitted to the wire B by frictional force. The wire B will be paid out.

The hydraulic rotary cylinder 25 presses the wire B of the reel 11 against the drive drum 10 at a predetermined pressure, and maintains the above-mentioned press-contact state by following a change in diameter due to the feeding of the wire B. Reel 11
At the time of attachment / detachment, as shown by the one-dot chain line in FIG.

As shown in FIG. 2, the traverse mechanisms 7, 7 include an advancing / retreating shaft 32 penetrating the vertical substrate 2 so as to be movable in the axial direction, and a ball screw shaft 33 located on the rear surface side of the vertical substrate 2. Are arranged in parallel with the vertical board 2 and supported by the bracket 34, and a traverse roller 35 is rotatably attached to the tip of the advance / retreat shaft 32, and a nut member 36 screwed to the ball screw shaft 33 is connected to the advance / retreat shaft 32. At the same time, the rear end of the ball screw shaft 33 is coupled to a servo motor 37 fixed to the bracket 34 via a coupling 38, and the rotation of the motor 37 causes the traverse roller 35 to reciprocate by a stroke corresponding to the width of the reel 11. It has become.

The wire tension urging portions 6, 6 fix two guide shafts 39, 39 parallel to the front surface of the vertical substrate 2 in a vertical arrangement, and can move up and down along both guide shafts 39, 39. A tension roller 41 is attached to the upper end of the elevating body 40 mounted so as to be vertically movable within the range of the elongated hole 42, and the tension roller 41 is always lowered to the lowering position by a spring 43. A tension is applied to the wire B wound in a folded shape by the weight of the lifting / lowering body 40 so that the sudden tension of the wire B is absorbed in two stages by the extension of the spring 43 and the upward movement of the lifting / lowering body 40. Has become.

The cutting portion 5 is provided with a rotating body 45 at a portion of a circular window hole 44 provided substantially at the center of the vertical substrate 2.
6 so as to be rotatable, and the rotating body 45 and the vertical substrate 2
The pulley 47 provided at the lower part of the rear surface
And the pulley 47 and the servomotor 49 are connected by a coupling 50.

Three multi-groove rollers 51, 52, 53 are rotatably mounted on the front surface of the rotating body 45 in a state of being parallel to each other, and a wire B is wound around the outer circumference of each of the multi-groove rollers 51, 52, 53. By turning, the wire B travels in the same direction in parallel between the multi-groove rollers 52 and 53, and the workpiece A to be cut is simultaneously cut into a plurality of thin pieces at the traveling portion.

The mounting portion 9 for the workpiece A to be cut is formed by erecting an elevating mechanism 54 such as a hydraulic cylinder on the base plate 1 immediately below the cutting portion 5 and providing a work mounting table 55 at the upper end thereof. By raising the workpiece A fixed on the upper part of the mounting table 55, the multi-groove roller 5
The cutting is performed by the wire B between 2 and 53.

The upper portions of the cutting section 5 and the mounting section 9 are covered with a case 56 provided on the front surface of the vertical substrate 2 so as to prevent scattering of cutting powder and the like. A wind roller 57 having a structure similar to that of the traverse mechanism 7 is disposed, and when the wire B is wound around the multi-groove rollers 51, 52, and 53 by rotation of the rotating body 45, the wind roller 57 is moved in the axial direction, The wire B can be automatically passed over each groove.

FIG. 4 shows the arrangement of the guide roller 8 provided between the cutting portion 5 and the wire tension urging portions 6, 6 located on both sides thereof. Side, and the other end is pulled out.

The wire saw having the above-described configuration is a wire saw drawn from the reel 11 of the wire supply unit 3.
Is wound many times in parallel with the multi-groove rollers 51, 52, 53 of the cutting unit 5 after passing through the traverse roller 35 and the wire tension urging unit 6, and then passes through the wire tension urging unit 6 and the traverse roller 35. , Reel 11 of wire collection unit 4
In this state, the wire B is caused to travel, the workpiece A fixed to the mounting table 55 of the mounting portion 9 is raised, and cutting is performed with the traveling wire B.

As shown by the solid line in FIG. 1, the driving of the driving drums 10 and 10 of the wire supply unit 3 and the wire recovery unit 4 is started by the servo motor 20 to rotate in the direction of the arrow in FIG. , Hydraulic rotary cylinder 25
The reels 11 and 11 are pressed against the drive drums 10 and 10 by the operation described above, and the wire supply unit 3 rotates the reel 11 in the wire feeding direction, and the wire collection unit 4 rotates the reel 11 in the wire winding direction.

As a result, the wire B travels from the wire supply unit 3 toward the wire collection unit 4, and the wire supply unit 3 reduces the winding diameter of the wire B on the reel 11, and conversely, the wire collection unit 4 In this case, since the winding diameter of the wire B on the reel 11 increases, the drive rollers 10 and 1
The wire B is driven at a constant speed by electrically controlling the servo motors 20 for driving the wire B and adjusting the feeding speed and the winding speed of the wire B.

The feeding and winding of the wire B are performed by pressing the wire B of the reel 11 against the driving drum 10 rotated at a fixed position, thereby transmitting the rotation to the reel 11 by frictional force. , Wire B
When an excessive tension is applied, the reel 11 slips with respect to the drive drum 10 to absorb the tension, thereby preventing the wire B from breaking.

After the cutting of the workpiece A, the driving drums 10 and 10 are rotated in the opposite direction to the above, and the wire B travels from the wire collecting section 4 to the wire supply section 3. Set the amount of unwinding length to be slightly shorter than the unwinding length when using cutting, so that the wire B is used repeatedly while the new wire portion of the wire is sequentially unwound by an appropriate length during the next cutting process. Has become.

[0031]

As described above, according to the present invention, the wire supply section and the wire recovery section in the wire saw are formed so that the reel is pressed against the rotary drive drum and the reel is rotated by frictional force. In unwinding and winding, if excessive tension is applied to the wire, the reel slips with respect to the drive roller, and the slip can release the tension, thereby reliably preventing the wire from being cut due to excessive tension. Therefore, tuning of the wire supply unit and the wire collection unit can be simplified with accuracy.

Further, by forming the outer peripheral surface of the drive roller with a friction-resistant member, not only the rotation can be reliably transmitted by friction, but also the durability of the drive roller can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a wire saw using a wire driving device of the present invention.

FIG. 2 is a vertical sectional side view of the same.

FIG. 3 is a sectional view taken along arrows III-III in FIG. 1;

FIG. 4 is a plan view showing the arrangement of guide rollers.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base plate 2 Vertical board 3 Wire supply part 4 Wire recovery part 5 Cutting part 6 Wire tension urging part 7 Traverse mechanism 8 Guide roller 9 Mounting part 10 Drum 11 Reel 12 Horizontal shaft 13 Bearing 14 Friction resistant member 15 Internal gear 16 Bearing 17 Shaft 18 Gear 19 Bracket 20 Servomotor 21 Coupling 22 Rotating shaft 23 Bearing 24 Arm 25 Hydraulic rotating cylinder 26 Coupling 27 Pin 28 Movable holder 29 Pin 30 Operating rod 31 Spring 32 Reciprocating shaft 33 Ball screw shaft 34 Bracket 35 Traverse roller 36 Nut member 37 Servo motor 38 Coupling 39 Guide shaft 40 Elevating body 41 Tension roller 42 Long hole 43 Spring 44 Circular window hole 45 Rotating body 46 Bearing 47 Pulley 48 Timing belt 49 Servo motor Heater 50 Coupling 51, 52, 53 Multi-groove roller 54 Elevating mechanism 55 Work mount 56 Case 57 Wind roller B Wire

Claims (2)

[Claims] 1. A cutting unit formed by arranging wires between a plurality of multi-groove rollers so as to run in parallel in the same direction during the movement of a wire fed from a wire supply unit and taken up by a wire collection unit. In the wire saw provided with, each of the wire supply unit and the wire recovery unit,
A rotary drive drum and a reel capable of approaching and separating from the drum that can be pressed against the drum are formed freely, and are formed of a reel that feeds or winds a wire, and transmits the rotation of the rotary drive drum to the reel by pressing frictional force. A wire driving device for a wire saw, comprising: 2. An outer peripheral surface of a rotary drive drum that is rotationally driven at a fixed position is formed of a friction-resistant member. 2. A rotating shaft, which is rotatably pivoted in a parallel state and in which said swing arm is fixed, is linked with a rotating drive device which presses and separates a reel from and against a rotating drive drum. A wire driving device in the wire saw according to 1.