JP2656719B2 - Device for preventing foreign matter from being caught in rollers in wire saws - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire saw,
More particularly, the present invention relates to a device for preventing foreign matter from being caught in a roller of a wire saw.

[0002]

2. Description of the Related Art Generally, a plurality of wires, which are unreeled from a unwinding reel and wound on a take-up reel, are arranged in parallel with a plurality of wire receiving grooves at a constant pitch in the middle thereof. A large number of wires are wound between rollers to form a wire row, and the workpiece is pressed against a wire row that reciprocates or linearly moves in one direction by rotating the roller forward or reverse or in one direction, in the presence of abrasive grains. Wire saws for cutting are known (for example, Japanese Patent Publication No. 57-469).
No. 89).

[0003]

However, when a workpiece is cut by a wire saw, a slurry containing abrasive grains is supplied to a cutting section of the workpiece, so that the abrasive grains mixed in the slurry are not supplied. When a piece of a workpiece or other foreign matter adheres to the wire and is carried, and enters into or is wound between the roller and the wire formed in the roller circumferential groove, the wire comes off the wire circumferential groove. This causes so-called wire jumping, increases the amount of displacement of the wire in the wire receiving groove in the axial direction of the roller, and causes a reduction in processing accuracy. In addition, if the pitch between the wire receiving grooves is reduced, the wire receiving groove will inevitably become shallower, which will make it easier for the wire to come off from the wire receiving groove, and will inevitably limit the cutting thickness of the workpiece. There is a problem such as being performed.

Accordingly, it is an object of the present invention to prevent a decrease in machining accuracy by preventing foreign matter from entering a wire receiving groove and a foreign matter from being caught between a roller and a wire, and to reduce a cutting thickness of a workpiece. It is an object of the present invention to provide an apparatus for preventing foreign matter from entering a roller in a wire saw capable of performing a cutting process with a small size.

[0005]

According to the present invention, there is provided an apparatus for preventing foreign matter from being caught in a roller of a wire saw according to the present invention, wherein one wire fed from a pay-out reel and taken up by a take-up reel is in the middle thereof. In this method, a large number of wire receiving grooves are wound around a plurality of parallel-arranged rollers having a constant pitch to form a wire row, and the linear drive is performed by rotating the rollers to form a wire row. In a wire saw that presses and cuts an object in the presence of abrasive grains, a partition plate whose edge is in sliding contact with a wire row located between a roller and a workpiece is provided. .

[0006]

[Function] Even if abrasive grains, workpiece fragments and other foreign matter adhering to the slurry adhere to the wire row, the foreign matter is scraped by the edge of the partition plate which slides on the wire row along with the linear movement of the wire row. The partition that is taken out and prevents foreign matter from entering the wire receiving groove and winding between the roller and the wire, preventing the wire from coming off and increasing the amount of displacement of the wire in the axial direction of the roller, and slidingly contacting the partition. Since the plate suppresses the swinging of the wire row in the roller axis direction, it is possible to make the wire receiving groove shallow, and as a result, it is possible to make the pitch interval between the wire receiving grooves small. ,
The cutting thickness of the workpiece can be reduced.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a wire saw of a wire saw according to an embodiment of the present invention;

FIG. 1 is a schematic view of an apparatus for preventing foreign matter from being caught in rollers in a wire saw according to this embodiment. In the figure, reference numeral 1 denotes a wire feeding reel, and 2 denotes a wire take-up reel. One wire S composed of a steel wire fed from the feeding reel 1 is wound around the processing unit roller 3 via a seesaw device (not shown) for absorbing the slack of the wire S, and the seesaw device is again turned on. The tape is taken up on the take-up reel 2 via the control unit.

The processing section roller 3 is, for example,
A rotatable roller 3 arranged in parallel at the vertex position of a triangle
1, 32, 33, each roller 31, 32,
Each of the rollers 33 has a number of wire receiving grooves 34 at a constant pitch interval.
3, the wire S is sequentially wound from one end of the wire receiving groove 34 to the other end of the wire receiving groove 34, and the interval between the windings of the wire S is uniform. As a result, a wire row SL is formed between the two rollers 32 and 33 at the horizontal position.

[0010] Of the processing section rollers 3, for example, the roller 31
Is rotated forward and reverse by the motor 4 to cause the wire row SL to reciprocate linearly. The workpiece w is pressed against the wire row SL thus reciprocated by a predetermined force, and the processing portion contains abrasive grains. Cutting is performed in the presence of abrasive grains while supplying slurry.

[0011] Between the roller 32 and the workpiece w and the workpiece w
Between the roller 33 and the rollers 33, there are provided partition plates 5, 6 in which one ends 5a, 6a abut on the wire row SL, respectively.
Therefore, the abrasive grains, fragments of the workpiece w, and other foreign matter attached to the wire row SL are slidably contacted with the wire row SL with the reciprocating linear motion of the wire row SL.
Are scraped off by the lower edges 5a, 6a of the roller 32,
33 into the wire receiving groove 34 and the roller 32;
33 is prevented.

Next, the mounting structure of these partition plates 5 and 6 is shown in FIG.
This will be specifically described with reference to FIG.

FIG. 2 is an explanatory view of a main part corresponding to a cross section taken along the line AA in FIG. 1. FIG. 3 is a cross-sectional view taken along the line BB in FIG. Is
It is a rear plate that rotatably supports the rollers 31, 32, 33 of the processing unit roller 3, and the rollers 31, 32,
The spindle 33 is fitted with a spindle shaft 8 that is rotatably provided upright from the rear plate 7 as shown in FIG. 3, and is fastened with a bolt (not shown) or the like.

On the other hand, a front plate 9 is provided facing the rear plate 7 with the rollers 31, 32, 33 interposed therebetween, and the rear plate 7 and the front plate 9 are formed into a pair of substantially L-shapes extending therebetween. Formed ribs 10,
11 which are connected to each other by a bolt 11
Partition plates 5 and 6 are attached to bolts 15 and 3, and lower ends 5a and 6a of the partition plates 5 and 6 are connected to a wire row SL.
Is in contact with

Since the ribs 10 and 11 and the partition plates 5 and 6 have symmetrical shapes, only the partition plate 6 will be described. However, the partition plate 6 is a rectangle elongated in the width direction of the wire row SL. In the vicinity of the lower edge 6a and the upper edge 6b, a pair of elongated holes 6c extending in the vertical direction are formed.
Is screwed into a screw hole 13a formed in the bracket 13 so as to be adjustable up and down.

In order to cut the workpiece w with the wire saw configured as described above, the roller 31 of the processing portion roller 3 is formed between the roller 32 and the roller 33 by rotating the roller 31 forward and reverse by the motor 4. Wire line SL
To reciprocate linearly, press the workpiece w from below with a predetermined force, and cut the workpiece w in the presence of the abrasive grains while supplying a slurry containing the abrasive grains to the processing portion.

The wire row SL being cut is pushed up by a workpiece w 'which moves relatively upward, for example, as shown by a dashed line SL' in FIG. 2, and the lower end edges 5a and 6a of the partition plates 5 and 6 are pushed up. The roller 32 is stretched between the rollers 32 and 33 in a state of being pressed and curved so as to protrude upward and reciprocates.

Accordingly, the abrasive grains, fragments of the workpiece w, and other foreign matters adhered to the wire row SL are scraped off by the lower edges 5a and 6a of the partition plates 5 and 6, and the rollers 32 and 33 are removed.
Into the wire receiving groove 34 and the rollers 32, 33
Is prevented from being caught between the wire S and the wire S, so that the wire S comes off from the wire receiving groove 34, that is, so-called wire jumping, and stable cutting of the workpiece by the wire saw can be secured.

Further, when the lower end edges 5a, 6a of the partition plates 5, 6 are pressed against the wire row SL during the cutting process, the axial center of the rollers 32, 33 of the wire row SL even when an external force acts on the wire row SL. The swing in the direction is suppressed, and even if the wire receiving groove 34 is formed shallowly, the wire receiving groove 34 does not come off from the wire receiving groove 34. As a result, the pitch interval between the wire receiving grooves 34 is reduced, so that the wire row SL Can be set small, and the cut thickness of the workpiece w can be reduced.

Further, the lower end edges 5a and 6a are worn by sliding contact of the row of wires SL with the lower end edges 5a and 6a of the partition plates 5 and 6 accompanying the cutting process, and a groove (not shown) is formed. Functions as a guide groove for the wire S to further suppress the swinging of the rollers 32 and 33 of the wire S in the axial direction, and secure more stable cutting and cutting accuracy. In addition, the removal of the foreign matter adhering to the wire row SL is further ensured.

If the partition plates 5 and 6 are worn by the sliding contact of the wire row SL by a predetermined amount or more due to the cutting work of the workpiece over a long period of time, the screws 15 are loosened and the upper edges of the partition plates 5 and 6 are removed. The lower edge is turned upside down and attached to the brackets 10 and 11 with the screws 15 as described above, or replaced with a new partition plate.

In the above description, the case where the groove functioning as the guide groove of the wire S is formed on the lower end edges 5a and 6a of the partition plates 5 and 6 by abrasion due to the sliding contact of the wire row SL has been described. It is also possible to form guide grooves in the lower edges 5a and 6a of the plates 5,6.

Also, the description has been given of the embodiment of the wire saw in which the wire train reciprocates linearly by the forward and reverse rotation drive of the roller. However, the wire saw which linearly moves the wire train in one direction by rotating the roller in one direction. It is also possible to apply, in which case it is also possible to arrange a partition plate only between the workpiece and the rollers arranged downstream of the workpiece.

[0024]

According to the apparatus for preventing foreign matter from being caught in a roller in a wire saw according to the present invention described above, a partition plate whose edge is in sliding contact with a row of wires located between the roller and the workpiece is provided. As a result, foreign matter adhering to the wire row is scraped off by the partition plate, foreign matter intrusion into the wire receiving groove and winding between the roller and the wire are avoided, and the wire comes off from the wire receiving groove and the roller shaft. Since the increase in the displacement amount in the center direction is prevented, stable cutting accuracy and cutting processing can be secured, and the swinging of the wire row in the roller axis direction of the wire row is suppressed by the partitioning plate that slides, the wire receiving groove is formed. It is possible to make the depth shallower, and as a result, it is possible to reduce the pitch interval between the wire receiving grooves, thereby enabling the cutting work to reduce the cutting thickness of the workpiece, and the like. And it has a.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an embodiment of a device for preventing foreign matter from being caught in a roller in a wire saw according to the present invention.

FIG. 2 is an explanatory view of a main part corresponding to a cross section taken along line AA in FIG. 1;

FIG. 3 is a sectional view taken along line BB in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Feeding reel 2 Take-up reel 5 Partition plate 5a Edge 6 Partition plate 6a Edge 7 Rear plate 9 Front plate 10 Rib 11 Rib 31 Roller 32 Roller 33 Roller 34 Wire receiving groove S Wire SL Wire row w Workpiece

Claims (3)

(57) [Claims] 1. A plurality of parallel-arranged rollers in which one wire fed from a pay-out reel and wound on a take-up reel has a large number of wire receiving grooves at a constant pitch in the middle thereof. A wire saw is wound around a large number of wires to form a row of wires, and the workpiece is pressed against a row of wires moving linearly by the rotation of the rollers to cut the workpiece in the presence of abrasive grains. A device for preventing foreign matter from being caught in a roller of a wire saw, comprising a partition plate having an edge slidably in contact with a wire row located at a position other than the above. 2. A partition plate is mounted on ribs extending between a front plate and a rear plate, which are disposed at both ends in the axial direction of the roller, via a plurality of rollers arranged in parallel. A device for preventing foreign matter from being caught in a roller of the wire saw. 3. The apparatus according to claim 1, wherein the partition plate has a guide groove for suppressing swinging of the wire in the axial direction of the roller.