JP2014108467A - Single wire saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a single wire saw which has a simple overall structure and can be downsized without provision of a feed mechanism for performing feed movement of a work-piece relatively to a wire.SOLUTION: A single wire saw is equipped with a work-piece support base 11 for fixedly positioning a work-piece 12. On both sides with the work-piece support base 11 interposed therebetween, a pair of guide rollers 18, which define a travel path of a wire 16 for cutting the work-piece running between a pair of reels 15, are provided. The guide rollers 18 are disposed in correspondence with a cutting end position 122 of the work-piece 12 cut by the wire 16. Dancer devices 19 for maintaining a tensile force of the wire 16 at a predetermined value are respectively provided between both the reels 15 and both the guide rollers 18.

Description

  The present invention relates to a single wire saw in which a workpiece is cut by a single wire traveling in a tension state.

Conventionally, as this type of single wire saw, for example, configurations as disclosed in Patent Document 1 and Patent Document 2 have been proposed.
In these conventional configurations, while a single wire stretched between a pair of guide rollers is running, the workpiece is fed and moved in a direction intersecting the running direction of the wire with respect to the wire. As a result, the workpiece is cut.

JP 2004-188545 A JP 2011-240449 A

  However, in these conventional configurations, it is necessary to provide a feed mechanism including a drive motor, a ball screw, and the like for feeding and moving the work, so that the structure of the entire single wire saw is complicated and large.

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a single wire saw that does not require a feeding mechanism for feeding and moving a workpiece relative to a wire, and that the entire structure is simple and can be miniaturized.

  In order to achieve the above object, this single wire saw is provided with a workpiece supporting portion for fixing and arranging a workpiece, and a workpiece cutting wire disposed between both sides of the workpiece supporting portion and traveling between a pair of reels. A pair of guide rollers for defining a travel route, the guide rollers are arranged corresponding to the wire cutting end position with respect to the workpiece, and a wire tension is set between at least one of the reels and the guide roller. It is characterized by providing a dancer device for holding the value.

  Therefore, during the operation of the single wire saw, the work is fixedly disposed on the work support portion, and the wire is bent between the guide rollers toward the cutting start position of the work and extended along the cutting start position of the work. The In this state, while the tension of the wire is held at a predetermined value by the dancer device, the wire is run by the rotation of the reel, and the workpiece is cut. As the workpiece is cut by the wire, the wire travel path between the guide rollers gradually changes toward the workpiece cutting end position, and the wire travel path reaches the workpiece cutting end position. The cutting of is finished. Therefore, it is not necessary to feed and move the workpiece relative to the wire by a feed mechanism including a drive motor and a ball screw, and the structure of the entire single wire saw can be simplified and downsized.

  According to the single wire saw, there is no need to provide a feed mechanism for feeding and moving the workpiece relative to the wire, and the entire structure can be simplified and reduced in size.

Sectional drawing which shows the single wire saw of 1st Embodiment. The fragmentary sectional view in the 2-2 line of FIG. The fragmentary sectional view in the 3-3 line of FIG. The principal part sectional view showing the single wire saw of a 2nd embodiment.

(First embodiment)
Hereinafter, a first embodiment of a single wire saw will be described with reference to FIGS.
As shown in FIG.1 and FIG.3, in the single wire saw of this embodiment, the workpiece support base 11 as a workpiece | work support part is arrange | positioned in the fixed state. A square block-shaped work 12 made of a brittle material or the like is bonded and fixed to the lower surface of the work support 11 via an interposing member 13 made of a material such as glass, carbon, or synthetic resin. A dummy work 14 made of a material such as severable glass, carbon, or synthetic resin is bonded and fixed to the lower surface of the work 12. On the lower surface of the dummy workpiece 14, positioning grooves 141 having a substantially V-shaped cross section as a positioning portion for positioning a wire 16 to be described later at a cutting start position 121 of the workpiece 12 extend in the left and right sides of the workpiece support 11. Is formed. On both side ends of the inner bottom portion of the positioning groove 141, arcuate surfaces 142 for allowing the wire 16 to travel without excessive resistance are formed.

  As shown in FIG. 1, a pair of reels 15 are rotatably disposed on the left and right sides of the work support base 11. A wire 16 for cutting a workpiece is stretched between the reels 15. In this case, the reels 15 are arranged so that the rotation axis thereof is located in a plane parallel to the plane along the travel path of the wire 16. Each reel 15 is connected to a drive motor 17 for winding and rotating the wire 16. A traverse roller 151 for traversing the wire 16 in the direction of the rotation axis of the reel is movably disposed on the peripheral side portion of each reel 15 when the wire 16 is fed or wound around the reel 15.

  As shown in FIGS. 1 and 2, a pair of guide rollers 18 for defining a traveling path of the wire 16 traveling between the reels 15 is rotatably disposed at both side positions sandwiching the workpiece support base 11. ing. Both guide rollers 18 are disposed corresponding to the cutting end position 122 of the workpiece 12 by the wire 16. In this embodiment, the cutting start position 121 of the work 12 is at the position of the dummy work 14 on the lower side of the work 12, and the cutting end position 122 of the work 12 is at the position of the interposition member 13 on the upper side of the work 12. Is provided.

  As shown in FIG. 1, a dancer device 19 is disposed between the reels 15 and the guide rollers 18 to keep the tension of the wires 16 at a predetermined value. The dancer device 19 includes a dancer arm 20 that is rotatably arranged around a horizontal axis, a dancer roller 21 that is rotatably supported at the tip of the dancer arm 20, and a control motor 22 that controls the dancer arm 20 to rotate. It is comprised by. Then, in a state where the wire 16 is hooked on the dancer roller 21 between the reel 15 and the guide roller 18, the dancer arm 20 is rotationally controlled by the control motor 22, and the tension of the wire 16 between the both guide rollers 18 is controlled. Is held at a predetermined value.

  As shown in FIGS. 1 to 3, a pair of guide members 23 for guiding the wire 16 to the cutting position are disposed between the guide rollers 18 and the work support 11. The guide member 23 is constituted by a pair of guide plates 231 that extend in parallel in the vertical direction to the cutting start end of the workpiece at an interval. As shown in FIG. 2, the outer edge of each guide plate 231 is formed to bend in directions away from each other. Supply as a machining liquid supply unit for supplying the machining liquid 25 such as coolant to the wire 16 passing between the two guide plates 231 of the guide member 23 at a position corresponding to the outer upper portion of each guide member 23. A nozzle 24 is disposed.

Next, the operation of the single wire saw configured as described above will be described.
During the operation of the single wire saw, the workpiece 12 is bonded and fixed to the lower surface of the workpiece support 11 via the interposed member 13. In this case, a dummy workpiece 14 having a positioning groove 141 is bonded and fixed to the lower surface of the workpiece 12 in advance. When the work 12 is fixed, the wire 16 that is stretched between the guide rollers 18 between the reels 15 is bent to the lower side of the work 12 as shown by a solid line in FIG. Is extended along the positioning groove 141. As a result, the wire 16 between the guide rollers 18 is positioned at the cutting start position 121 of the workpiece 12.

  In this state, while the tension of the wire 16 is maintained at a predetermined value by the dancer device 19, the wire 16 is run by the rotation of the reel 15, and the workpiece 12 is cut. During the cutting of the workpiece 12, as shown by the chain line in FIG. 1, the traveling path of the wire 16 between the guide rollers 18 gradually moves toward the cutting end position 122 side of the workpiece 12 as the workpiece 12 is cut. Be changed. Further, the movement position of the wire 16 relative to the reel 15 and the winding position of the wire 16 are changed by the movement of the traverse roller 151 in both reels 15.

  In this case, a change in tension occurs in the wire 16 between the two guide rollers 18 with a change in the travel route of the wire 16 and a change in the feeding position and winding position of the wire 16. 18 is absorbed by a dancer device 19 provided on both sides of 18. 1, when the travel path of the wire 16 reaches the cutting end position 122 of the work 12 and the wire 16 is extended in a single line between the guide rollers 18, the work 12 by the wire 16 is shown. The cutting of is finished.

Therefore, according to this embodiment, the following effects can be obtained.
(1) In this single wire saw, a work support base 11 is provided as a work support part for fixing and arranging the work 12. A pair of guide rollers 18 are provided on both sides of the workpiece support 11 to define the traveling path of the workpiece cutting wire 16 traveling between the pair of reels 15. The guide roller 18 is arranged corresponding to the cutting end position 122 of the workpiece 12 by the wire 16. Between both reels 15 and both guide rollers 18, there is provided a dancer device 19 for holding the tension of the wire 16 at a predetermined value.

  For this reason, when the single wire saw is operated, the workpiece 12 is fixedly disposed on the workpiece support 11 and the wire 16 is bent between the guide rollers 18 toward the cutting start position 121 of the workpiece 12 so that the workpiece 12 It extends along the cutting start position 121. In this state, while the tension of the wire 16 is maintained at a predetermined value by the dancer device 19, the wire 16 is run by the rotation of the reel 15, and the workpiece 12 is cut. As the workpiece 12 is cut by the wire 16, the traveling path of the wire 16 between the guide rollers 18 gradually changes toward the cutting end position 122 of the workpiece 12, and the traveling path of the wire 16 cuts the workpiece 12. When the end position 122 is reached, the cutting of the workpiece 12 is completed. Therefore, it is not necessary to feed and move the workpiece 12 relative to the wire 16 by a feed mechanism including a drive motor and a ball screw, and the structure of the entire single wire saw can be simplified and downsized.

  (2) In this single wire saw, the rotation axes of the reels 15 are arranged in a plane parallel to the plane along the travel path of the wires 16. For this reason, both reels 15 can be arranged without projecting greatly from the surface along the travel path of the wire 16, the number of guide rollers can be reduced, and the overall configuration can be further reduced in size. When both reels 15 are arranged in this way, when the wire 16 is fed or wound while being traversed in the direction of the rotation axis of the reel 15, a large fluctuation in tension occurs with respect to the wire 16. The tension variation of 16 can be absorbed by the dancer device 19.

  (3) In this single wire saw, a guide member 23 for guiding the wire 16 to the cutting position is provided between the guide roller 18 and the work support base 11. For this reason, even if the traveling route of the wire 16 between the guide rollers 18 changes as the work 12 is cut by the wire 16, the guide member 23 can always guide the wire 16 to the cutting position. High-precision cutting can be performed.

  (4) In this single wire saw, the guide member 23 is provided with a supply nozzle 24 as a processing liquid supply unit for supplying the processing liquid 25 to the wire 16. For this reason, even when the traveling path of the wire 16 between the guide rollers 18 is arranged on the lower side of the workpiece 12, the machining liquid 25 can be easily supplied onto the wire 16 via the guide member 23.

  (5) In this single wire saw, a positioning groove 141 as a positioning portion for positioning the wire 16 at the cutting start position 121 of the workpiece 12 is provided on the workpiece 12. For this reason, by arranging the wire 16 along the positioning groove 141 at the start of the cutting of the workpiece 12, it can be easily and accurately positioned at the cutting start position 121 of the workpiece 12.

  (6) In this single wire saw, the positioning groove 141 is formed on the dummy workpiece 14 fixed to the outer surface of the workpiece 12. Therefore, the positioning groove 141 can be easily provided at the cutting start position 121 of the workpiece 12 by fixing the dummy workpiece 14 in which the positioning groove 141 has been formed in advance to the outer surface of the workpiece 12.

(Second Embodiment)
Next, a second embodiment of the single wire saw will be described with a focus on differences from the first embodiment.

  In this 2nd Embodiment, as shown in FIG. 4, the workpiece | work 12 is formed in a column shape, and it adheres and fixes to the lower surface of the workpiece | work support stand 11 via the interposed member 13 in the upper outer periphery. . A dummy workpiece 14 is bonded and fixed to the lower outer periphery of the workpiece 12, and a positioning groove 141 as a positioning portion is formed on the lower surface of the dummy workpiece 14 so as to extend in an arc shape.

Therefore, also in the second embodiment, it is possible to obtain substantially the same effects as the effects described in (1) to (6) in the first embodiment.
(Example of change)
In addition, this embodiment can also be changed and embodied as follows.

  In the embodiment, the cutting start position 121 of the workpiece 12 by the wire 16 is provided on the upper side of the workpiece 12, and the cutting end position 122 of the workpiece 12 is provided on the lower side of the workpiece 12.

  In the embodiment, the positioning groove 141 as a positioning portion for positioning the wire 16 at the cutting start position 121 of the workpiece 12 is directly formed on the outer peripheral surface of the workpiece 12.

  A dancer device 19 is provided only between one reel 15 and the guide roller 18.

  DESCRIPTION OF SYMBOLS 11 ... Work support stand as a work support part, 12 ... Work, 121 ... Cutting start position, 122 ... Cutting end position, 14 ... Dummy work, 141 ... Positioning groove as positioning part, 15 ... Reel, 16 ... Wire, 17 DESCRIPTION OF SYMBOLS ... Driving motor, 18 ... Guide roller, 19 ... Dancer device, 20 ... Dancer arm, 21 ... Dancer roller, 22 ... Control motor, 23 ... Guide member, 24 ... Supply nozzle as machining fluid supply unit, 25 ... Working fluid.

Claims (4)

A workpiece support for fixedly arranging the workpiece;
A pair of guide rollers that are disposed on both sides of the workpiece support portion and define a traveling path of a wire for cutting a workpiece that travels between the pair of reels;
The guide roller is arranged corresponding to the cutting end position of the workpiece by the wire,
A single wire saw provided with a dancer device for maintaining the tension of the wire at a predetermined value between at least one of the reels and the guide roller. The single wire saw according to claim 1, wherein the rotation axes of the reels are arranged in a plane parallel to a plane along the travel path of the wire. The single wire saw according to claim 1 or 2, wherein a guide member for guiding the wire to a cutting position is provided between the guide roller and the work support portion. The single wire saw according to claim 3, wherein the guide member is provided with a machining liquid supply unit for supplying a machining liquid to the wire.