JPH07237108A - Main roller connecting device - Google Patents

Abstract

(57) [Abstract] [Purpose] Prevents slippage between the groove of the main roller and the wire when cutting an object to maintain the processing accuracy of the product, and when winding a new wire, The wire can be easily wound around the groove. [Structure] In a wire saw, a motor is connected to the drive-side main roller shaft, an electromagnetic clutch and pulleys are attached to all the main roller shafts, and endless belts are wound around the pulleys or all main roller The pulley is attached to the shaft of, the endless belt is wound around the pulley in a loose state, and a clutch roller is provided on this belt so that it can be moved in the belt tension adjusting direction by the operating means. It is controlled by the controller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a wire saw,
The present invention relates to a device for connecting a driving motor and a main roller.

[0002]

2. Description of the Related Art In a wire saw, wires are wound in multiple grooves in a plurality of main rollers, and the wires run by the rotation of the main rollers to cut an object to be cut into thin plates. A driving motor is used to rotate the main roller, and the output shaft of the motor is connected to the shaft of the main roller.

For example, in Japanese Patent Laid-Open No. 61-182759, all the main rollers are rotationally driven by one driving motor and power transmission means, and the three main rollers are the same during the cutting operation. Synchronous rotation is performed at the rotation speed, that is, the rotation speed.

According to this technique, since the three main rollers rotate simultaneously, when winding a new wire, the new wire is wound once or twice with respect to the end of the main roller.
By wrapping it in a spiral shape about once, and making it spiral,
By rotating the main roller in the direction of advance of the spiral, new wire can be wound easily. Therefore, in terms of wrapping new wire, driving all the main rollers is beneficial.

[0005]

However, in the above apparatus, due to an error in manufacturing the main roller or a groove on the outer periphery of the main roller, uneven wear of the groove of the main roller during cutting, and the like,
The three main rollers no longer rotate synchronously, which results in
Slip occurs between the wire and the groove of the main roller,
Since the groove and the wire are partially abraded, the wire breakage and the thickness accuracy of the cut product, the smoothness of the cut surface, and the like are greatly adversely affected.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to prevent slippage between a groove of a main roller and a wire when cutting an object to be cut, maintain machining accuracy of a product, and wind a new wire. The purpose is to easily wind the wire around the groove of the main roller.

[0007]

In view of the above object, the present invention relates to a wire saw of this type, in which a driving motor is connected to the shaft of one drive-side main roller, and the shafts of all the main rollers are electromagnetically coupled. Attach a pulley connected to the shaft of each main roller via the clutch and this electromagnetic clutch, wrap an endless belt around these pulleys, or attach pulleys to the shafts of all the main rollers. An endless belt is loosely wrapped around the roller, and a clutch roller is provided on the belt in a movable state in the belt tension adjusting direction by an operating means.
The electromagnetic clutch or the roller for the clutch is controlled by a controller.

Then, when winding a new wire, all the main rollers are rotated by a driving motor so that the wires are spirally wound in the grooves of the plurality of main rollers, and at the time of cutting an object to be cut. Only one main roller is rotated by the drive motor, and the other main roller is driven by the wire wound around it to prevent slippage between the groove of the main roller and the wire. , Eliminates their local wear and tear and maintains wire breakage and processing accuracy.

[0009]

Embodiment 1 FIGS. 1 and 2 show an outline of a wire saw 1. In the wire saw 1, a plurality of, for example, three main rollers 2 are arranged in parallel with, for example, the vertex positions of an inverted triangle, and the wires 3 are provided inside the grooves 2a of the main rollers 2.
Is made into a spiral shape and is wound in multiple layers, and the upper side portion of the wire 3 parallel to the cutting position is made to correspond to the object to be cut 4. The grooves 2a of the main roller 2 are, for example, V-shaped and are formed at a pitch equal to the peripheral surface of the roller corresponding to the cutting thickness.

As shown in FIG. 3, the main roller coupling device 5 of the present invention has a motor shaft 7 and a shaft of the main roller 2 for transmitting the rotation of the driving motor 6 to the main roller 2. Installed in part 8. That is, the motor 6 is arranged on the same axis as the shaft 8 of the one main roller 2 on the driving side, and the motor shaft 7 is connected to the shaft 8 of the main roller 2 on the driving side by the shaft coupling 9. There is.
Each shaft 8 is rotatably supported by the frame 23.

An electromagnetic clutch 10 and a pulley 14 connected to the shaft 8 via the electromagnetic clutch 10 are attached to the shafts 8 of all the main rollers 2. That is, one clutch plate 11 of the electromagnetic clutch 10 is integrally displaceable with the pulley 14 in the direction of the main axis with respect to the shaft 8, and the other clutch plate 12 is fixed to the shaft 8 of the electromagnetic coil 13. It is attached so as to attract the clutch plate 11 by excitation and rotate integrally with the pulley 14.

The electromagnetic coil 13 of the electromagnetic clutch 10 is connected to the controller 15, and connects or disconnects the pulley 14 with the shaft 8 depending on the operating state. The electromagnetic coil 13 is attached to the frame 23 to prevent rotation. A belt 16 such as an endless timing belt is wound around these three pulleys 14 with a tension capable of transmitting a rotational force.

When the new wires 3 are wound around the three main rollers 2, the controller 15 is operated to operate the electromagnetic clutch 1.
With the exciting coil 13 of 0 in the excited state, the clutch plate 11
And the clutch plate 12 are in a connected state. Then, the new wire 3 is wound around the grooves 2a at the ends of the three main rollers 2 several times, and one end on the winding start side is fixed to the adjacent wire 3 using the connecting tool 17, and is wound in a spiral shape as a whole.

In this state, when the motor 6 is rotated in the winding direction of the wire 3, the rotation of the motor shaft 7 rotates the main roller 2 on the drive side via the shaft coupling 9 and the shaft 8 and also connects the drive side main roller 2 and the main roller 2. The rotation in the same direction is transmitted to the other main rollers 2 via the electromagnetic clutch 10 in the state.
As a result, the wire 3 wound in a spiral shape has the same effect as a spiral, that is, a screw, and the groove 2a at one end of the main roller 2
To the groove 2a on the other end side in a spiral manner. In this way, the new wire 3 is helically wound around the groove 2a of the main roller 2 in multiple layers. The wires 3 at the cutting position face the object 4 to be cut in a parallel state at a pitch corresponding to the thickness of the object 4 to be cut.

During the cutting operation of the object 4 to be cut, the object 4 to be cut is
Faces the wire 3 at the cutting position by a holder or the like (not shown). When setting the disengagement operation, the controller 15 deenergizes the electromagnetic clutch 10 to separate the two main rollers 2 on the driven side from the shaft 8 on the driving side, that is, the shaft 8 connected to the motor shaft 7. When the motor 6 rotates in this state, the motor shaft 7 is connected to the drive side shaft 8 via the shaft coupling 9.
To rotate only the drive side main roller 2. At this time, the other two driven main rollers 2 are
The wire 3 wound around the drive-side main roller 2 receives a rotational force and rotates to impart a traveling motion for cutting to the wire 3.

In this state, as shown in FIG. 1, the object 4 to be cut is pressed against the running wire 3 and the slurry 18 for cutting is supplied thereto, so that the object 4 to be cut has a predetermined size. It is cut into a thin plate in thickness. In this cutting process,
Since only one main roller 2 is on the drive side and the other two upper main rollers 2 receive the rotational force from the wire 3 and rotate following them, the number of rotations (rotation speed) between these main rollers 2 is increased. 2) hardly appears, and the slip between the groove 2a of the main roller 2 and the wire 3 is reduced. Therefore, the partial wear of the groove 2a and the wear of the wire 3 are suppressed to a low level, so that the processing accuracy at the time of cutting is improved.

[0017]

Second Embodiment In this embodiment, as shown in FIG. 4, all the shafts 8 of the main roller 2 are used without using the electromagnetic clutch 10.
A pulley 14 such as a V-pulley is fixed on the pulley 14, an endless V-belt belt 16 is loosely wound around the pulley 14, and the clutch roller 19 can be displaced with respect to the belt 16 in the tension adjusting direction. This is an example in which the cylinder 20 and the lever 24 as means are provided so as to be displaceable. The cylinder 20 is controlled by a controller 22 that controls the solenoid valve 21.

When the new wire 3 is wound around the main roller 2, the controller 22 operates the cylinder 20 to
The clutch roller 19 is pressed against the belt 16 so that the belt 1
Put 6 in tension. As a result, the rotation of the motor shaft 7 can be transmitted to all the main rollers 2 via the three pulleys 14 and the belt 16. Therefore, as in the first embodiment, by winding the new wire 3 around the three main rollers 2 and fixing the winding-side end portion with the connecting tool 17, the motor 6 is rotated in the winding direction. The new wire 3 is wound around the three main rollers 2.

On the other hand, when the object to be cut 4 is cut, the controller 22 operates the cylinder 20, the clutch roller 19 is retracted, and the tension of the belt 16 is released to rotate the pulley 14 on the driving side to another value. It is not transmitted to the two pulleys 14. In this state, the motor 6
Is rotated, the main roller 2 on the drive side is rotated, and the wire 3 wound around this is run in the cutting direction. As a result, the cut object 4 is cut in the same manner as in the first embodiment. At this time, the two main rollers 2 near the cutting position are driven by the drive-side main roller 2 via the wire 3. Also in this embodiment, the same effect as that of the above embodiment can be obtained.

[0020]

According to the present invention, when winding a new wire,
Since all the main rollers are driven by the motor and rotate at the same number of rotations (rotation speed) in synchronization, the wires are sequentially wound in the winding direction even when the winding amount is small at the initial stage of winding the wire. Therefore, the winding work can be performed easily, and during the cutting operation, the rotation of the drive-side main roller and the other main roller is separated by the electromagnetic clutch or the mechanical clutch between the belt and the clutch roller. Since the other main roller is driven by the wire in response to the rotation of the main roller on the side, the slip between the main roller and the wire is suppressed to a low level, and the local portion of the groove portion of the main roller is suppressed. Wear and partial wear of the wire are reduced, the cut thickness of the cut object can be maintained uniform for a long time,
Therefore, the processing accuracy at the time of cutting is improved.

[Brief description of drawings]

FIG. 1 is a schematic front view of a wire saw.

FIG. 2 is an enlarged cross-sectional view of a wire wound around a groove of a main roller.

FIG. 3 is a side view of the main roller connecting device according to the first embodiment.

FIG. 4 is a front view of a main roller connecting device according to a second embodiment.

[Explanation of symbols]

 1 Wire Saw 2 Main Roller 3 Wire 4 Object to be Cut 5 Main Roller Coupling Device 6 Motor 7 Motor Shaft 8 Shaft 10 Electromagnetic Clutch 14 Pulley 15 Controller 16 Belt 19 Clutch Roller 20 Cylinder 22 Controller

Claims (2)

[Claims] 1. A wire is wound in a plurality of grooves in a plurality of main rollers, and the wire is caused to travel by the rotation of one drive-side main roller, and the running wire is pressed against an object to be cut. In a wire saw that cuts cut objects into thin plates, a drive motor is connected to the shaft of one main roller on the drive side, and the shafts of all the main rollers are electromagnetic clutches and each main roller via this electromagnetic clutch. Attach pulleys that are connected to the shaft of, and wrap an endless belt around these pulleys, and connect the electromagnetic clutch by exciting when winding a new wire and disconnecting by disconnecting while the work is being cut. A main roller connecting device characterized by being controlled by a controller. 2. A wire is wound in a groove of a plurality of main rollers in a multiple manner, and the wire is run by the rotation of one main roller on the driving side, and the running wire is pressed against an object to be cut, In a wire saw that cuts cut objects into thin plates, pulleys are attached to the shafts of all the main rollers, endless belts are wound around these pulleys in a loose state, and clutch rollers are applied to these belts by means of belt tension. A controller that is provided so as to be movable in the adjustment direction of the above, and that displaces the clutch roller in the direction of high tension when winding a new wire and also in the direction of loosening the belt tension during cutting of the workpiece. A main roller connecting device characterized by being controlled by.