JP2002239890A - Accumulator and wire saw machine provided therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the efficient use of a wire and produce a decrease in fault rate by using an accumulator to support the amount of loading in applying tension to a travel path for the wire. SOLUTION: This wire saw machine comprises the front and rear accumulators 3, 5 for the wire W arranged at the front and rear stages of a cutting portion 2 of the wire saw machine, the front and rear accumulator comprising fixed pulley groups 30, 50 rotatably mounted on fixed shafts 31, 51 and elevatable pulley groups 32, 52 rotatably mounted on elevatable shafts 34, 54 elevatably arranged in opposition to the fixed shafts. The wire is alternately wound on the fixed pulleys and the elevatable pulleys and the elevatable shafts are elevatably moved by the movement of the wire and the dead weights of the elevatable pulley groups. The fixed pulley groups and the elevatable pulley groups are formed to have diameters gradually smaller as tending to the ends for convenience in changing the individual pulleys.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to metal, stone, glass,
The present invention relates to an accumulator used for a wire saw machine that cuts a hard substance such as ceramics (hereinafter referred to as “stone material”) to an appropriate thickness with a reciprocating wire, and a wire saw machine including the same.

[0002]

2. Description of the Related Art Generally, when cutting hard material such as small blocks of stone, it can be cut with a rotary blade to which diamond or the like is attached. It was difficult. In addition, it is difficult to maintain accuracy with a rotary blade when slicing a thin plate from such a stone or the like, and work efficiency is poor when slicing a large number of pieces.

[0003] In response to such demands, a wire saw machine for cutting a file by reciprocating ("reciprocating") a filed wire has conventionally been used. Usually, the wire used as a cutting blade of these wire saw machines is used several times to reciprocate (usually 5 to 10 reciprocations) up to the point of consumption in order to be used effectively as long as it has a cutting function. This reciprocating movement is performed by arranging a mechanism called an accumulator, which temporarily stores the wire, before and after the cutting section where the wire moves, and performing retraction and extension from here.

[0004] As a conventional example of such a configuration, there is an accumulator disclosed in Japanese Patent Application Laid-Open No. Hei 2-30490, for example. This is a mechanism in which a wire is alternately hooked between a number of pulleys arranged vertically, and the interval between the pulleys is expanded and contracted by a crank mechanism, thereby pulling the wire and temporarily storing a predetermined length of the wire. .

[0005]

However, in such a wire saw machine, one of the problems is a broken wire. That is, since the wire saw machine cuts the wire by reciprocating the stone or the like as described above, for example, when the wire tries to return in the opposite direction at the cutting portion, the wire on the wire supply portion side from the cutting portion is There is a possibility that slack will occur due to low tension. In addition, the next time the wire travels in the opposite direction, it is applied as an instantaneous pulling force (impact force), so that a heavy load is imposed on the wire. Therefore, it is necessary to separately provide anchors on both sides of the cut portion for the purpose of always applying a constant force to the wire W to eliminate slack, and the configuration of the wire saw machine has been complicated.

[0006]

Accordingly, the present invention has been made in view of the above-mentioned problems, and an accumulator for temporarily storing a reciprocating traveling wire has a structure in which excessive tension is unlikely to occur and a simple structure. An accumulator used in a wire saw machine, which aims to prevent cutting accidents, enable efficient use of wires, reduce the number of parts, reduce the incidence of failures, and thereby reduce costs. The present invention provides a wire saw machine provided with:

[0007]

Means for Solving the Problems To solve the above problems, the present invention is configured as follows. That is,
According to claim 1, in the mechanism of the front and rear accumulators (3, 5) which are respectively disposed on the front side and the rear side of the cutting section (2) of the wire saw machine and temporarily store the repetitive use of the reciprocating wire. A stationary pulley group (30, 50) comprising a plurality of stationary pulleys in which the stage accumulators (3, 5) are rotatably mounted coaxially with the stationary shafts (31, 51), and the stationary shafts (31, 51). Elevating pulley groups (32, 52) composed of a plurality of elevating pulleys rotatably mounted on the same axis as the elevating shafts (34, 54) that are arranged so as to be able to elevate and lower. The stationary pulley and each lifting pulley are wound alternately, and the lifting shaft (3) is moved by the movement of the wire and the weight of the lifting pulley group (32, 52).
(4, 54) is an accumulator that moves up and down.

According to a second aspect of the present invention, in the configuration of the stationary pulley group (30, 50) and the elevating pulley group (32, 52) of the first aspect, a wire supply section (2) is provided from a cutting section (2) side via a wire. 1) or an accumulator configured to gradually reduce the diameter of each pulley group toward the wire winding section (4).

According to a third aspect of the present invention, a multi-groove pulley (22) for driving and rotating the wire and a wire extending between the multi-groove pulley (22) travel reciprocally to cut an object. An accumulator (3, 5) of the mechanism according to claim 1 or 2, wherein the accumulator is arranged on the front side and the rear side of the cutting section (2), respectively, and temporarily stores the repetitive use of the reciprocating wire. A wire supply unit (1) for intermittently supplying a new wire to the pre-stage accumulator (3); a wire winding unit (4) for intermittently winding a waste wire from the post-stage accumulator (5); And a lifting / lowering table that is disposed below (2) and moves the object up and down toward the cutting section (2).

[0010]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration perspective view of the wire saw machine of the present embodiment, and FIG. 2 is an explanatory view of a main part of the wire saw machine of the present embodiment. In this wire saw machine, a pre-stage accumulator 3 is provided between a wire supply unit 1 for supplying a new wire W and a cutting unit 2 for cutting a stone or the like S. The pre-stage accumulator 3 includes a stationary pulley group 30, a slide rail 33, and an elevating pulley group 32.

The stationary pulley group 30 comprises coaxial three kinds of stationary pulleys 30a, 30b, 30 each independently rotating coaxially with the stationary shaft 31 and gradually increasing in diameter toward the shaft support side.
c and is held by a stationary shaft 31. The slide rails 33 are fixed pulley groups 3 with the long direction being the vertical direction.
0, and the slide piece 33a is engaged. An elevating shaft 34 described later is provided on the slide piece 33a.

The lifting / lowering pulley group 32 includes four types of coaxial shafts which independently rotate on the same axis as a lifting / lowering shaft 34 which is disposed so as to be capable of ascending / descending facing the stationary shaft 31 and gradually increase in diameter toward the shaft support side. Diameter elevating pulleys 32a, 32b, 32c, 32
d, and is held by the elevating shaft 34 of the slide piece 33a. A guide pulley 6 is provided between the pre-stage accumulator 3 and the wire supply unit 1 and between the cutting unit 2 and the wire. The wire supply unit 1 includes a supply bobbin 10 on which a new wire W is wound by a predetermined amount, and a drive motor M2 for intermittently rotating the supply bobbin.

[0013] Also, between the wire winding section 4 for winding the wire W to be discarded and the cutting section 2, the rear accumulator arranged symmetrically with respect to the cutting section 2 has the same configuration as the former accumulator 3. 5 are provided. The latter-stage accumulator 5 includes a stationary pulley group 50, a slide rail 53, and a lifting pulley group 52.

The group of stationary pulleys 50 comprises three types of stationary pulleys 50a, 50b, 50, which rotate independently on the same axis as the stationary shaft 51 and gradually increase in diameter toward the shaft support side.
and is held by a stationary shaft 51. The slide rail 53 is provided with the stationary pulley group 5 with the long direction being the vertical direction.
0, and the slide piece 53a is engaged. An elevating shaft 54 described later is provided on the slide piece 53a.

The lifting pulley group 52 includes four types of coaxial shafts which independently rotate on the same axis as a lifting shaft 54 which is disposed so as to be capable of ascending and descending opposing to the stationary shaft 51 and whose diameter gradually increases toward the shaft support side. Diameter elevating pulleys 52a, 52b, 52c, 52
d, and is held by the elevating shaft 54 of the slide piece 53a. In addition, the latter-stage accumulator 5 and the cutting unit 2
, And also between the wire winding unit 4 and the guide pulley 6. Further, the wire winding section 4 includes a winding bobbin 40 for appropriately winding the wire W for disposal,
This is constituted by a drive motor M3 for intermittent rotation. The lifting pulley groups 32 and 52 have a predetermined own weight in order to absorb the slack of the wire W and apply tension to the wire W.
The weight is about g.

A driving motor M1 as a driving means for reciprocatingly moving the wire W in the cutting section 2 (this is referred to as "reciprocating traveling") is configured so that forward and reverse rotations can be appropriately performed. are doing. And this output shaft 24
Is connected to the rotary drive pulley 20, and the timing belt 2
1, the rotating shafts 23a of three multi-groove pulleys 22a, 22b, 22c arranged in parallel at the corners of the regular triangular prism,
The rotational driving force is transmitted to 23b and 23c.

A groove is formed on the side peripheral surface of the multi-groove pulley 22 one round at a predetermined interval, and the wire W is wound at a predetermined interval by engaging with this groove. The number of windings and the winding interval of the wire W in the multi-groove pulley 22 are appropriately set depending on the thickness and the number of the stones S or the like having a desired specification. In addition,
The configuration itself of the cutting section 2 is the same as that of a conventionally known wire saw machine, and thus detailed description thereof will be omitted.

[0018]

Next, the operation of the wire saw machine configured as described above will be described. This wire saw machine cuts a stone S or the like by placing a stone S or the like as an object to be cut on a work table T and moving it up and down in the same manner as in the related art so that the S or the like is pressed against a reciprocating wire W. It is. Here, the traveling direction of the wire W from the wire supply unit 1 side to the wire winding unit 4 side is X direction, and the traveling direction of the wire W from the wire winding unit 4 side to the wire supply unit 1 side is Y direction.
The direction is used in the following description.

The driving torque generated by the forward / reverse switching of the driving motor M1 passes through the output shaft 24, the rotating driving pulley 20, the timing belt 21, the rotating shafts 23a, 23b and 23c, and the multi-groove pulleys 22a and 22b of the cutting section 2. , 22c, and the wire W reciprocates. In the present embodiment, the wire W having a length of 10 m
It is set to reciprocate, and in the process, one for each reciprocation
The setting is such that a new wire W is replaced by m each time.

The winding of the wire W in the pre-stage accumulator 3 is sequentially performed clockwise via the guide pulley 6 on the side of the wire supply unit 1 from the lifting pulley 32a on the tip side of the lifting pulley group 32 to the stationary pulley group 30. Is wound around the stationary pulley 30a on the distal end side, and then wound in order of the lifting pulley 32b, the stationary pulley 30b, the lifting pulley 32c, and the stationary pulley 30c. To the guide pulley 6 on the cutting section 2 side.

The winding of the wire W in the post-stage accumulator 5 is sequentially performed clockwise through the guide pulley 6 on the cutting section 2 side from the lifting pulley 52d on the lifting pulley group 52 side to the shaft supporting side of the stationary pulley group 50. , And then wound in the order of the lifting pulley 52c, the stationary pulley 50b, the lifting pulley 52b, and the stationary pulley 50a, and finally winding the wire from the lifting pulley 52a on the distal end side of the lifting pulley group 52. It is wound around the guide pulley 6 on the part 4 side.

The procedure for feeding out the wire W in such a setting is as follows.
Wire W is wound. In this state, when the wire W is driven in the X direction by the rotational drive of the multi-groove pulley 22 of the cutting unit 2, the wire W is pulled in accordance with the movement, and the lifting pulley group 32 engaged with the slide rail 33 rises (arrow). a) Further, in addition to this, the drive motor M2 is activated to supply a new wire W by 1 m from the supply bobbin 10, and the wire W of 10 m moves in the X direction.

The traveling in the X direction causes the lifting / lowering pulley group 52 engaged with the slide rail 53 of the subsequent accumulator 5 to descend by its own weight and wind the wire W (arrow b). 10 m of the wire W that has contributed to the cutting operation of the stone S or the like will be wound. Here, since the winding length of the rear-stage accumulator 5 is 9 m, the remaining 1 m is wound on the winding bobbin 40 by the start of the drive motor M3 that starts intermittently. become.

Next, when the multi-groove pulley 22 is rotated in the reverse direction by switching the drive motor M1, the wire W travels in the Y direction, and is pulled by this to move up and down the pulley engaged with the slide rail 53 of the post-stage accumulator 5. The group 52 rises (arrow c), and the wire W for 9 m moves in the Y direction. By traveling in the Y direction, the lifting pulley group 32 engaged with the slide rail 33 of the pre-stage accumulator 3
Is lowered by its own weight to wind up the wire W (arrow d), so that the wire W travels the cutting section 2 again and winds 9 m of the wire W that has contributed to the cutting operation of the stone S or the like. Here, since the winding length of the pre-stage accumulator 3 is 9 m, the wire W is again fed in the X direction again by the start of the drive motor M1 which is started intermittently as described above. New wires W are added.

By repeating such an operation, the pre-stage accumulator 3 adds 1 m of the new wire W from the wire supply unit 1 in the forward path (movement in the X direction), and
m is supplied to the cutting section 2 and, on the return path (movement in the Y direction), 1 m is left in the subsequent accumulator 5 and 9 m is wound.

On the other hand, the post-stage accumulator 5 winds 10 m in the forward path, unwinds 9 m except for 1 m in the return path, and supplies it to the cutting unit 2. The remaining 1 m in the next forward movement is wound by wire. It is designed to be wound around the take-up part 4.

The winding and unwinding by the former accumulator 3 and the latter accumulator 5 are performed by the respective lifting pulley groups 32 and 52, and the driving motor M2 of the wire supply unit 1 and the wire winding unit 4 The drive motor M3 is set to start intermittently.

Further, the pre-stage accumulator 3 of this embodiment,
The post-stage accumulator 5 does not have its own rotary drive source itself, and suspends and holds the lifting pulley groups 32 and 52 on one side by the running force of the wire W due to the rotation of the rotary drive pulley 20 of the cutting unit 2. Things. In other words, the tension of the wire W that contributes to the cutting of the stone S or the like in the cutting section 2 is appropriately set according to the balance of the own weights of the lifting pulley groups 32 and 52 of the accumulators 3 and 5 in the front and rear stages. .

[0029]

[Possibility of Another Embodiment] In the wire saw machine of the above embodiment shown in FIG.
m, but it is not restricted to this.
The length of reciprocating travel and the length of return can be appropriately set depending on differences in the hardness of the stone S or the like to be cut, the properties of the wire W, and the like. In this embodiment, the timing belt is used to transmit the rotational force from the drive motor M1 to the cutting unit 2, but a chain or a gear may be used instead.

The pre-stage accumulator 3 and the post-stage accumulator 5 are a plurality of stages of fixed pulley groups 3 of different diameters as shown.
The pulleys are constituted by 0, 50 and lifting / lowering pulley groups 32, 52. This is for removing the outer peripheral side of each pulley independently, and each pulley may have the same diameter. Further, in view of the object of the present invention, any configuration may be appropriately changed as long as the wire W having a predetermined length can be wound.

[0031]

According to the present invention having the above construction, there is no need to provide a separate load for applying tension to the traveling path of the wire W, and this can be shared by the accumulator. A simple configuration can be achieved. As a result, there is an effect that the occurrence rate of failures is reduced, maintenance is facilitated, and the occurrence of wire breakage accidents is significantly reduced, and the industrial effect is great.

[Brief description of the drawings]

FIG. 1 is a schematic configuration perspective view of a wire saw machine of the present embodiment.

FIG. 2 is an explanatory view of a main part of the wire saw machine of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wire supply part 10 Supply bobbin 2 Cutting part 20 Rotary drive pulley 21 Timing belt 22 Multi-groove pulley 23 Rotary shaft (of multi-groove pulley) 24 Output shaft (of motor M1) 3 Pre-stage accumulator 30 Stationary pulley group 30a Fixed pulley 30b stationary pulley 30c stationary pulley 31 stationary shaft 32 elevating pulley group 32a elevating pulley 32b elevating pulley 32c elevating pulley 32d elevating pulley 33 slide rail 33a slide piece 34 elevating shaft 4 wire winding unit 40 winding bobbin 5 rear accumulator 50 stationary pulley group 50a stationary pulley 50b stationary pulley 50c stationary pulley 51 stationary shaft 52 elevating pulley group 52a elevating pulley 52b elevating pulley 52c elevating pulley 52d elevating pulley 53 slide rail 53a slide piece 54 elevating shaft 6 Idopuri W wire S stone like T worktable M1, M2, M3 ·· drive motor

Claims (3)

[Claims] 1. A front and rear accumulator (3, 5) mechanism which is respectively disposed on a front side and a rear side of a cutting section (2) of a wire saw machine and temporarily stores a repetitively used amount of a reciprocating wire. The stage accumulators (3, 5) are
1, 51) A stationary pulley group (30, 50) composed of a plurality of stationary pulleys rotatably mounted coaxially with each other, and an elevating shaft arranged to be movable up and down opposite to the stationary shafts (31, 51). A lifting pulley group (32, 52) composed of a plurality of lifting pulleys rotatably mounted coaxially on (34, 54), and winding a wire alternately between each stationary pulley and each lifting pulley. An accumulator characterized in that the lifting shafts (34, 54) move up and down by the movement of the wire and the weight of the lifting pulley group (32, 52). 2. In a configuration of a stationary pulley group (30, 50) and a lifting pulley group (32, 52), a wire supply section (1) or a wire winding section from a cutting section (2) side via a wire. 2. The accumulator mechanism according to claim 1, wherein each pulley group has a gradually decreasing diameter toward (4). 3. A multi-groove pulley (22) for driving and rotating a wire to travel, and a cutting portion (2) for cutting a target object by a wire stretched between the multi-groove pulleys (22) traveling reciprocally. ,
The accumulator (3, 5) of the mechanism according to claim 1 or 2, wherein the accumulator (3, 5) is disposed on the front side and the rear side of the cutting section (2), respectively, and temporarily stores a repetitive use of the reciprocating wire.
A wire supply unit (1) for intermittently supplying a new wire to the pre-stage accumulator (3), a wire winding unit (4) for intermittently winding a waste wire from the post-stage accumulator (5), A wire-saw machine, comprising: a lifting table arranged below the cutting section (2) to move an object up and down toward the cutting section (2).