TWI568557B - Wire saw and lead wire cutting method - Google Patents

Description

Wire saw and wire cutting method for workpiece

The present invention relates to a wire saw for cutting a workpiece by pressing a traveling lead, and a method of cutting the workpiece by the lead.

JP1999-291154A discloses a wire saw in which a fixed abrasive grain lead obtained by fixing abrasive grains such as diamond to a core wire by electroplating or resin is moved, and the lead wire is brought into contact with the workpiece to cut the workpiece. In the wire saw disclosed in JP 1999-291154 A, the lead wire fed from the lead supply portion is wound by the wire collecting portion, and the lead wire moved therebetween is brought into contact with the workpiece to cut the workpiece.

In such a wire saw, one lead wire that moves between the lead supply portion and the lead wire collecting portion is wound so as to be wound around a plurality of multi-groove rollers and arranged in a row and in the same direction. The workpiece can be simultaneously cut into a plurality of sheets by pressing the workpiece against a plurality of cut portions formed by the lead thus drawn.

In such a wire saw, in order to cut the workpiece efficiently, the tension of the lead wires constituting the cut portion must be maintained within an appropriate range. When the lead is too tight, the lead will break. Therefore, the wire saw disclosed in JP1999-291154A is further provided with a roller which is crimped to the supply side reel of the lead supply portion and the recovery side reel of the lead take-up portion. In the wire saw, two pressure rollers on the supply side and the winding (recycling) side are driven to indirectly drive the supply side reel and the recovery side reel. Therefore, in the wire saw disclosed in JP1999-291154A, the asynchronous land between the supply side reel and the recovery side reel is made. The tension of the raw material is changed by sliding on the pressure roller, thereby absorbing it, thereby stabilizing the tension of the wire.

However, when a plurality of multi-groove rolls are arranged in a side-by-side manner and pulled in the same direction to form a cut portion, and the workpiece is pressed against the lead of the cut portion, the lead wire is supplied. After the portion is fed out, the lead wire that contacts the workpiece changes its subsequent tension due to its resistance. Therefore, it is difficult to make all the tensions of the plurality of cut portions formed by pulling one lead in a side-by-side manner and simultaneously cutting the workpiece to be uniform.

SUMMARY OF THE INVENTION An object of the present invention is to provide a wire saw with a plurality of cut portions for cutting a workpiece formed by pulling one lead, and a method for cutting a workpiece by a lead.

According to one aspect of the present invention, a wire saw includes: a lead supply unit that feeds a lead; a lead collecting unit that collects the fed lead; and a plurality of cut portions that are supplied to the lead supply unit The lead wire is pulled between the lead wire collecting portion and the workpiece is cut, and the wrapper is rotated in a state in which the lead wire between the lead wire supplying portion and the lead wire collecting portion is wound around the lead wire. The lead wire is moved, and the feed-side winch is provided in the lead supply portion, and is rotated in a state in which the front lead wire on the lead supply portion side of the transfer winch is wound, thereby adjusting the tension of the front lead wire And a recovery side winch which is provided in the lead wire collecting portion and which is rotated in a state in which the rear lead wire on the lead wire collecting portion side of the transfer winch is wound, thereby adjusting the tension of the rear side lead; Further, the plurality of the cutting portions are the front side lead that moves between the delivery side winch and the transfer winch, and the transfer winch and the recovery Movement between the rear wire winch form.

According to another aspect of the present invention, there is provided a method of cutting a workpiece by a lead, which cuts a workpiece by a lead which is fed from a lead supply portion and is wound by a lead collecting portion; and the cutting method is as follows: The lead wire between the lead supply unit and the lead wire collecting portion is wound around a transfer winch to rotate the transfer winch, thereby moving the lead wire; and the feed side winch is used to supply the lead wire to the transfer winch Adjusting the tension of the front side lead on the side of the portion; adjusting the tension of the rear lead on the lead collecting portion side of the transfer winch by the recovery side winch; and using the winch on the delivery side in a state where the tension is adjusted The front lead wire that moves between the transfer winches and the rear side lead that moves between the transfer winch and the recovery side winch in a state where the tension is adjusted is cut off the workpiece.

10‧‧‧ wire saw

11‧‧‧ lead

11a, 11b‧‧‧cutting department

11a‧‧‧ front lead

11b‧‧‧ rear lead

12‧‧‧Workpiece

20‧‧‧Lead Supply Department

21‧‧‧ board

21a‧‧‧Installation feet

22‧‧‧Reel

23‧‧‧Support table

24‧‧‧ cabinet

25‧‧‧ plumb board

26‧‧‧Location Detection Agency

26a, 26b‧‧‧ winding roller

26c‧‧‧ swinging board

27‧‧‧ Tension device

27a, 27b‧‧‧ guide roller

27c‧‧‧ elastic adjustment arm

28‧‧‧roll

29‧‧‧Send the load unit for the lead

31‧‧‧Send side winch

32, 33‧‧‧ winding roller

34‧‧‧ Front side rotary motor

40‧‧‧Processing machine body

41‧‧‧Shell

41a‧‧‧Installation feet

41b, 41c‧‧‧

41d‧‧‧ top board

42‧‧‧ Lifts

42a‧‧‧Loading table

42b‧‧‧ lift body

42c‧‧‧Hose

42d‧‧‧Support feet

43‧‧‧ pulley

44‧‧‧ brake

46‧‧‧Transfer winch

47, 48‧‧‧ winding rollers

49‧‧‧Drive motor

51, 52‧‧‧1st and 2nd load units

53, 54‧‧‧3rd and 4th load cells

56~59‧‧‧ poles

120‧‧‧Lead Recycling Department

121‧‧‧Lead recovery device

121a‧‧‧Installation feet

122‧‧‧Reel

123‧‧‧Support table

124‧‧‧ cabinet

125‧‧‧ plumb board

126‧‧‧Location Inspection Agency

126a, 126b‧‧‧ winding roller

126c‧‧‧ swinging board

127‧‧‧ Tension device

127a, 127b‧‧‧ guide rollers

127c‧‧‧ elastic adjustment arm

128‧‧‧ Roll

129‧‧‧Recovery load unit for lead

131‧‧‧Recovery side winch

132, 133‧‧‧ winding roller

134‧‧‧Rotary motor

Fig. 1 is a view showing the configuration of a wire saw according to an embodiment of the present invention and a method of cutting a workpiece by a lead.

Fig. 2 is a front elevational view of a wire saw according to an embodiment of the present invention.

Fig. 3 is a plan view of a wire saw according to an embodiment of the present invention.

Fig. 4 is a perspective view of a wire saw according to an embodiment of the present invention.

Figure 5 is a cross-sectional view taken along line A-A of Figure 2.

Fig. 6 is a perspective view showing a pulley and a brake inside the casing of the wire saw according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Fig. 1 shows the configuration of a wire saw 10 according to an embodiment of the present invention. The wire saw 10 has a lead supply portion that feeds the lead wires 11 , a lead wire collecting portion that collects the supplied lead wires 11 , and a cut portion that is formed between the lead wire supply portion and the lead wire collecting portion. The cutting portion is formed by the lead wire 11 in the middle of the movement between the lead supply portion and the lead wire collecting portion, and is configured to cut the workpiece 12.

The specific configuration of the wire saw 10 is shown in Figs. 2 to 4 . The wire saw 10 includes a lead wire feeding device 20 that constitutes a wire supply portion, a wire collecting device 120 that constitutes a wire collecting portion, and a processing machine body 40 that is transported from the wire feeding device 20 and then recovered by the wire collecting device 120. The lead 11 on the way is pulled to the inside. Hereinafter, in each of the drawings, three axes of X, Y, and Z orthogonal to each other are set, the X axis is extended in the horizontal horizontal direction, the Y axis is extended in the horizontal direction, and the Z axis is extended in the vertical direction. Thus, the configuration of the wire saw 10 will be described.

The lead wire feeding device 20, the processing machine main body 40, and the lead wire collecting device 120 are sequentially arranged in the Y-axis direction. The lead wire feeding device 20 and the lead wire collecting device 120 are formed in a symmetrical structure, and their respective configurations are the same. The lead wire feeding device 20 and the lead wire collecting device 120 are respectively moved in the normal rotation direction and the reverse rotation direction.

When the lead wire feeding device 20 feeds the lead wire and the lead wire collecting device 120 collects the lead wire as the forward rotation direction, the lead wire collecting device 120 functions as a feeding device (lead supply portion) when the wire is fed in the reverse direction, and the wire feeding device 20 It functions as a lead collection device (lead collection unit). At this time, only the lead wire 11 is sent out in the opposite direction to the recovery operation. Therefore, in the present embodiment, the lead wire feeding device 20 in the normal rotation direction will be mainly described. Further, since the reel 122 to the rotary motor 134 of the lead wire collecting device 120 are configured similarly to the reel 22 to the rotary motor 34 of the lead wire feeding device 20, detailed description thereof will be omitted. Moreover, in the positive turn In the above description, as described above, the delivery side winch 31 and the recovery side winch 131 are required to use the expressions such as "sending side" and "recovery side". Hereinafter, the direction of the arrow shown in FIG. 1 will be described as the forward direction. .

As shown in FIGS. 2 to 4, the lead wire feeding device 20 is provided with a platen 21 having a plurality of mounting legs 21a. The platen 21 is configured to be horizontally provided by a plurality of elongated mounting legs 21a. The platen 21 is provided with a reel 22 (see Fig. 2) in which the rotating shaft extends in the X-axis direction. The reel 22 winds the lead wire 11 around the winding body portion thereof to store the wire. The reel 22 is provided on the support table 23 so that its rotation axis is rotatable. The support base 23 is attached to the platen 21 so as to be movable in the axial direction (X-axis direction) of the reel 22 in a state where the reel 22 is rotatably supported.

Here, the lead 11 wound around the reel 22 is used as a cutting tooth of the jigsaw 10, and in the present embodiment, it is constituted by a so-called fixed abrasive grain lead. The fixed abrasive grain lead is obtained by fixing abrasive grains such as diamond to the periphery of the lead wire, such as a lead, by plating or resin. The lead 11 is not limited to the fixed abrasive grain lead, and other types of leads may be used as long as the workpiece 12 can be cut.

Although not shown, a feeding motor that rotates the reel 22 is provided on the support base 23. The delivery motor is a servo motor that can change the rotational speed of the reel 22 for lead supply. A control output line of a controller (not shown) is connected to the delivery motor. Further, the delivery motor rotates the reel 22 for supplying the lead at a predetermined speed based on an instruction from the controller, whereby the lead 11 can be fed from the reel 22.

A casing 24 is assembled on the upper surface of the platen 21 (see Fig. 3). On the front surface of the casing 24 above the reel 22, a vertical plate 25 orthogonal to the X-axis and parallel to the YZ plane is mounted. As shown in FIG. 2, a position detecting mechanism 26 is provided on the vertical plate 25, and the position detecting mechanism 26 performs the position of the lead wire 11 fed from the reel 22 from the X-axis direction (the axial direction of the reel 22). Detection.

The position detecting mechanism 26 includes a pair of winding rollers 26a and 26b pivotally supported by the swinging plate 26c and wound around the lead wire 11 which is fed upward from the reel 22; and an angle detecting sensor (not shown) for The rotation angle of the oscillating plate 26c with respect to the reference position is detected.

The pair of winding rollers 26a and 26b are arranged side by side in the vertical direction at the other end in the Y-axis direction of the swinging plate 26c. The swinging plate 26c is pivotally parallel to the vertical plate 25. More specifically, the swinging plate 26c is in a state in which the pair of winding rollers 26a, 26b are positioned above the reel 22, with one end in the Y-axis direction centering on the rotation axis parallel to the vertical axis (Z-axis) The pivot plate is pivotally supported by the vertical plate 25.

The lead wires 11 that are directed upward from the reel 22 are wound in a pair of wrap rollers 26a and 26b in the shape of an S-shaped hook. Therefore, if the feeding position of the lead wire from the reel 22 is deviated in the X-axis direction, the swinging plate 26c swings. Thereby, when the angle sensor (not shown) detects the swing of the swinging plate 26c, the support table 23 of the support reel 22 is moved in the X-axis direction, and the lead wire 11 from the reel 22 is caused. The delivery position is always fixed.

The tension plate 25 is provided with a tensioning device 27 for imparting a constant tension to the lead wires 11 which are wound around the winding rollers 26a and 26b by one of the position detecting mechanisms 26. The tension device 27 is provided with a pair of guide rollers 27a and 27b which are wound in an S shape with leads 11 which have passed through a pair of winding rollers 26a and 26b, and a tension adjusting arm 27c which is pivotally supported at both ends with a pair of guide rollers 27a and 27b are pivotally supported by the vertical plate 25 so as to be rotatable about the center of the pair of guide rolls 27a and 27b; and a torque motor (not shown) which defines the elastic adjustment arm 27c. Torque rotation.

As the torque motor, a servo motor that generates a fixed torque by torque control can be used. Applying a biasing force in the rotational direction of the dancer arm 27c by the torque motor A predetermined tension is applied to the lead wires 11 which are wound around the guide rollers 27a and 27b provided at one of the both ends of the elastic adjusting arm 27c.

Here, the vertical plate 25 is provided with a roller 28 for feeding the lead wire 11 at a position where the load is not excessively applied to the winding roller 26a attached to the oscillating plate 26c. Further, the lead plate 25 is provided with a lead wire load unit 29 that winds the lead wires 11 between the position detecting mechanism 26 and the tension device 27 and detects the tension of the lead wires 11 therebetween.

Thereafter, the lead wires 11 wound around the pair of guide rollers 27a and 27b are transmitted through the delivery side winch 31 provided on the vertical plate 25.

The lead wire 11 is first wound around the recovery side winch 131 on the lead wire collecting device 120 which is disposed apart from the lead wire feeding device 20 in the Y-axis direction. Thereafter, the lead wire 11 passes through the tension device 127 of the lead collection device 120, the recovery lead load unit 129, and the position detecting mechanism 126, and then is wound around the reel side reel 122.

The processing machine main body 40 provided between the lead feeding device 20 and the lead collecting device 120 configured as described above is pulled into the inside by the lead wire 11 which is sent out from the lead feeding device 20 and recovered by the lead collecting device 120.

The processing machine main body 40 is provided with a casing 41 that houses the workpiece 12, which is a target object to be cut, which is cut by the moving lead wire 11 , inside. The casing 41 is a casing having a plurality of mounting legs 41a, and doors 41b and 41c for inserting and detaching the workpiece 12 are provided on the upper portion of the front surface.

As shown in FIG. 2, an elevator 42 that lifts and lowers the workpiece 12 on the upper side of the casing 41 is provided. The lifter 42 includes a mounting table 42a on which the workpiece 12 is actually mounted, a support leg 42d on the upper end of which the mounting table 42a is provided, and an elevator body 42b that lifts and lowers the support leg 42d together with the mounting table 42a. Support leg 42d between the mounting table 42a and the elevator body 42b It is surrounded by a bellows-like hose 42c. Thereby, the intrusion of the cutting oil dropped to the workpiece 12 at the time of cutting can be prevented.

Further, as will be described later, a plurality of pulleys 43 (FIG. 6) for pulling the lead wires 11 in the middle of the movement and a part or all of the plurality of pulleys 43 are provided inside the casing 41 and above the elevator 42. Brake 44 (Figure 6).

As shown in FIG. 1, the wire saw 10 is provided with a transfer winch 46 around which a lead wire 11 between a lead feeding device (lead supply portion) 20 and a lead collecting device (lead collecting portion) 120 is wound. The lead wire 11 is wound around the circumference of the transfer winch 46 in a range of 360° or less. The lead wire 11 can also be wound around the 360° or more and wound around the transfer winch 46. Further, a lead-side winch 31 is provided in the lead wire feeding device 20, and a recovery-side winch 131 is provided in the lead collecting device 120. The wire saw 10 is configured such that the front side lead 11a that moves between the feed side winch 31 and the transfer winch 46 and the rear side lead 11b that moves between the transfer winch 46 and the recovery side winch 131 cut the workpiece 12.

The transfer winch 46 is rotated in a state in which the lead wires 11 in the middle of the movement between the lead wire feeding device 20 and the lead wire collecting device 120 are wound, whereby the lead wires 11 are moved. As shown in FIGS. 2 to 5, the transfer winch 46 is exposed to the outside of the casing 41 constituting the processing machine main body 40. Specifically, the transfer winch 46 is provided on the side wall of the casing 41 on the side of the lead collecting device 120.

A lead wire 11 is wound around the transfer winch 46. As shown in FIGS. 4 and 5, a pair of winding rollers 47, 48 for winding the lead wires 11 around the transport winch 46 are provided in the vicinity of the transport winch 46 on the side wall of the casing 41 on the side of the lead collecting means 120.

The transfer winch 46 is such that the lead 11 is always moved at a fixed speed. A drive motor 49 that rotates the transfer winch 46 is provided on the side wall of the casing 41 on the lead recovery device 120 side. The drive motor 49 is a servo motor that can change the rotational speed of the transfer winch 46. A control output line of a controller (not shown) is connected to the drive motor 49. The controller is controlled in such a manner that the transfer winch 46 is always rotated at a fixed speed by the drive motor 49, and the lead wires 11 wound around the transfer winch 46 are always moved at the same speed.

As shown in FIG. 1, the wire saw 10 includes first and second load units 51 and 52 for detecting the tension of the front lead 11a before and after the workpiece 12 is cut, and third and fourth load units 53, 54. This detects the tension of the rear side lead 11b before and after the workpiece 12 is cut.

As shown in FIG. 2, the first load unit 51 is provided on the side wall of the casing 41 on the side of the lead feeding device 20. As shown in FIGS. 4 and 5, the second to fourth load units 52 to 54 are provided on the side wall of the casing 41 on the side of the lead collection device 120.

Specifically, the first load unit 51 is provided on the side wall of the casing 41 so as to be wound around the lead wire 11 which is fed from the lead wire feeding device 20 and is drawn into the casing 41. Previous lead 11.

As shown in FIG. 5, the second load unit 52 is provided on the side wall of the casing 41 so as to be wound around the inside of the casing 41, and the lead 11 is pulled out from the inside of the casing 41 and directed toward the lead wire 11 of the transmission winch 46. The third load unit 53 is provided on the side wall of the casing 41 so as to be wound around the lead wire 11, and the lead wire 11 is again directed from the transport winch 46 toward the lead wire 11 inside the casing 41. The fourth load unit 54 is a side wall of the casing 41 so as to be wound around the lead wire 11 which is pulled out from the inside of the casing 41 and faces the lead wire 11 of the lead collecting device 120.

As shown in FIG. 2 to FIG. 4, the delivery side winch 31 provided on the vertical plate 25 of the lead wire feeding device 20 is connected to the lead wire 11 on the front side (the lead wire feeding device 20 side) of the transfer winch 46. State rotation, whereby the front between the delivery side winch 31 and the transfer winch 46 is adjusted A tension adjusting winch for tension of the side lead 11a. The lead wire 11 is wound around the circumference of the delivery side winch 31 in a range of 360° or less. The lead wire 11 can also be wound around the 360° or more and wound around the delivery side winch 31. In the vertical plate 25, a pair of winding rollers 32, 33 for winding the lead wires 11 around the delivery side winch 31 are provided in the vicinity of the delivery side winch 31.

A front side rotation motor 34 that rotates the delivery side winch 31 is provided in the vertical plate 25. The front side rotation motor 34 is a servo motor that can change the rotation speed of the delivery side winch 31. A control output line of a controller (not shown) is also connected to the front side rotation motor 34.

On the other hand, the recovery-side winch 131 provided on the vertical plate 125 of the lead collecting device 121 is rotated in a state in which the lead wires 11 on the rear side (the side of the lead collecting means 121) are wound around the transfer winch 46. Thereby, the tension adjusting winch for adjusting the tension of the rear side lead 11b between the winch 46 and the recovery side winch 131 is adjusted. The lead wire 11 is wound around the recovery side winch 131 in a range of 360° or less. The lead wire 11 can also be wound around the 360° or more and wound around the recovery side winch 131. In the vertical plate 125, a pair of winding rollers 132, 133 for winding the lead wires 11 around the recovery side winch 131 are provided in the vicinity of the recovery side winch 131.

A rear side rotation motor 134 that rotates the recovery side winch 131 is provided in the vertical plate 125.

The rear side rotation motor 134 is also a servo motor that can change the rotation speed of the recovery side winch 131. A control output line of a controller (not shown) is also connected to the rear side rotation motor 134.

As shown in FIG. 1, the first and second load cells 51 and 52 provided in the casing 41 (see FIG. 2) detect the tension of the front lead 11a before and after the workpiece 12 is cut. The third and fourth load cells 53 and 54 detect the tension of the rear lead 11b before and after the workpiece 12 is cut. The detection output lines of the first to fourth load units 51 to 54 are connected to a control not shown Device.

The controller controls the front side rotation motor 34 based on the detection outputs of the first and second load units 51 and 52 to control the rotation of the delivery side winch 31. Thereby, the controller adjusts the tension of the front side lead 11a that moves between the delivery side winch 31 and the transfer winch 46.

Further, the controller controls the rear side rotation motor 134 based on the detection outputs of the third and fourth load units 53, 54 to control the rotation of the recovery side winch 131. Thereby, the controller adjusts the tension of the rear side lead 11b that moves between the transfer winch 46 and the recovery side winch 131.

When one lead 11 is moved at a fixed speed by the transfer winch 46, and the workpiece 12 is cut by the lead 11 before and after the transfer winch 46, the resistance generated when the cutting of the front side lead 11a of the workpiece 12 is first cut is applied. The rear side lead 11b of the workpiece 12 is then cut. Therefore, the tension between the front side lead 11a and the rear side lead 11b which are subjected to the cutting process differs.

On the other hand, in the present embodiment, the rotation of the feed-side winch 31 is controlled to adjust the tension of the front lead 11a, and the rotation of the recovery-side winch 131 is controlled to adjust the tension of the rear lead 11b. Therefore, the tension of the front side lead 11a and the rear side lead 11b can be adjusted separately. Thereby, the tension between the front side lead 11a and the rear side lead 11b of the workpiece 12 can be made uniform at the same time, and the workpiece 12 can be more stably cut.

The first and second load cells 51 and 52 detect the tension of the front lead 11a before and after the workpiece 12 is cut, and the third and fourth load units 53 and 54 are the tension of the rear lead 11b before and after the workpiece 12 is cut. Test. Therefore, the front lead wire 11a and the rear side lead wire 11b are the same as the values of the first and third load cells 51 and 53 are equal, and the values of the second and fourth load cells 52 and 54 are also equal. The tension is adjusted to make it more uniform Cutting process. Here, since the moving speed of the lead wire 11 is fixed by the transfer winch 46, the moving speed of the lead wire 11 does not change with the tension adjustment.

When the lead wire 11 is moved by the rotation of the transfer winch 46, the lead wire 11 is fed out from the reel 22 of the lead wire feeding device 20 by the rotation of the feed side winch 31. When the amount of the reel 22 fed from the delivery side increases with respect to the amount of movement of the lead 11, the total length of the lead 11 wound around the pair of guide rolls 27a and 27b of the tension device 27 increases. Therefore, the dancer arm 27c is rotated in the left direction indicated by the solid arrow in FIG.

On the other hand, when the amount of the lead wire 11 fed from the take-up side of the reel 22 is reduced, the total length of the lead wire 11 wound around the pair of guide rolls 27a and 27b is reduced. Therefore, the dancer arm 27c is rotated in the right direction indicated by the dotted arrow in FIG.

The rotation of the dancer arm 27c from the neutral position can be detected by an encoder (not shown). The controller controls a motor (not shown) that rotates the reel 22 on the delivery side based on the detection output of the encoder, and changes the rotation speed of the adjustment reel 22 to adjust the delivery amount of the lead 11 to the transfer winch 46. The amount of movement is the same. Thereby, the elastic adjustment arm 27c is maintained at the neutral position.

In the lead collection device 120, the lead wire 11 is recovered by rotating the recovery-side winch 131, and is wound around the reel 122 on the recovery side. When the amount of recovery of the reel 122 on the recovery side is reduced, the total length of the lead 11 wound around the pair of guide rolls 127a and 127b of the tension device 127 is increased. Therefore, the dancer arm 127c is rotated in the right direction indicated by the solid arrow in FIG.

On the other hand, when the amount of recovery of the reel 122 on the recovery side is increased, the total length of the lead 11 wound around the pair of guide rolls 127a and 127b is also reduced. Therefore, the dancer arm 127c is rotated in the left direction indicated by the dotted arrow in FIG.

The rotation of the dancer arm 127c from the neutral position can be detected by an encoder (not shown). The controller controls the motor that rotates the reel 122 on the recovery side based on the detection output of the encoder, and changes the rotation speed of the reel 122 on the recovery side to adjust the amount of recovery of the lead 11 to the transfer winch 46. The resulting amount of movement of the lead wires 11 is the same. Thereby, the dancer arm 127c is maintained at the neutral position.

In the processing machine body 40 that pulls the lead 11 between the lead feeding device 20 and the lead collecting device 120, the moving speed of the lead 11 pulled into the inside of the casing 41 is always fixed by the rotation of the conveying winch 46. Further, inside the casing 41, the front side lead 11a and the rear side lead 11b are wound by a plurality of pulleys 43. In Fig. 6, a pulley 43 and a brake 44 for moving all or part of the pulley 43 are shown. Specifically, a top plate 41d (see FIG. 2) is provided above the workpiece 12 inside the casing 41, and a stopper 44 is provided on the top plate 41d.

Fig. 6 shows a case where the front lead 11a is pulled to the near side of the doors 41b and 41c (see Fig. 2) in the X-axis direction, and the rear lead 11b is pulled to the inside. Four struts 56 to 59 are provided inside the casing 41, and the pulleys 43 for pulling the lead wires 11 are vertically supported by the four struts 56 to 59. Specifically, on the side of the doors 41b and 41c in the X-axis direction, the first and second stays 56 and 57 which are arranged side by side in the Y-axis direction are provided with two struts. The pulley 43 pivotally supported by the first and second stays 56 and 57 pulls the front lead 11a.

On the side away from the doors 41b and 41c, two struts of the third and fourth stays 58 and 59 which are arranged side by side in the Y-axis direction are provided. The pulley 43 pivotally supported by the third and fourth stays 58, 59 pulls the rear lead 11b.

The brake 44 is configured to movably form a plurality of pulleys 43 through the four struts of the first, second, third, and fourth struts 56, 57, 58, and 59. The first pole 56 is not available It is movably fixed to the top plate 41d.

On the other hand, the second stay 57 is movably configured by the brake 44 in both the Y-axis direction and the Z-axis direction. The front lead 11a of the workpiece 12 is wound around the pulley 43 pivotally supported by the first and second stays 56, 57, and the Y-axis direction between the first and second stays 56, 57 can be changed. The total length is changed by the distance. Further, the front lead wire 11a that cuts the workpiece 12 is configured to be inclined in the horizontal direction by raising and lowering the second stay 57 in the Z-axis direction.

The brake 44 is configured to movably move the third stay 58 in the X-axis direction. The fourth stay 59 is movably configured in any of the three axial directions.

Therefore, by winding the pulleys 43 pivotally supported by the third and fourth stays 58, 59 and cutting the rear lead 11b of the workpiece 12, the Y between the third and fourth stays 58 and 59 can be changed. The total length is changed by the distance in the axial direction. Further, the rear side lead 11b that cuts the workpiece 12 can be inclined in the horizontal direction by raising and lowering any of the third and fourth stays 58 and 59 in the Z-axis direction.

When the third and fourth stays 58 and 59 are moved in the X-axis direction to change the distance in the X-axis direction between the first and second stays 56 and 57, the front lead 11a and the rear lead 11b can be changed. the distance.

Next, a method of cutting the workpiece by the lead wire of the present embodiment will be described.

In the method of cutting the workpiece by the lead wire of the present embodiment, as shown in FIG. 1, the lead wire 11 which is fed by the lead wire feeding device 20 as the wire supply portion and wound by the wire collecting device 120 as the lead wire collecting portion is taken up. a method of cutting the workpiece 12; in the cutting method, the lead 11 between the lead feeding device 20 and the lead collecting device 120 is wound around the conveying winch 46 In the state in which the transfer winch 46 is rotated, the lead wire 11 is moved, and the tension of the front lead wire 11a on the front side (the lead wire feeding device 20 side) of the transfer winch 46 is adjusted by the feed side winch 31. The recovery side winch 131 adjusts the tension of the rear side lead 11b on the rear side (the lead recovery device 120 side) of the transfer winch 46, and is used between the delivery side winch 31 and the transfer winch 46 in a state where the tension is adjusted. The moving front side lead 11a and the rear side lead 11b which is moved between the transfer winch 46 and the recovery side winch 131 in a state where the tension is adjusted are cut off the workpiece 12.

When the wire saw 10 shown in FIG. 2 to FIG. 4 is used, first, the doors 41b and 41c provided on the front surface of the casing 41 are opened, and the workpiece 12, which is the object to be cut, is mounted on the mounting table 42a of the elevator 42 (Fig. 2). Further, the lead wire 11 fed from the lead wire feeding device 20 is pulled to the inside of the casing 41 and wound around the conveying winch 46.

Thereafter, the lead wire 11 pulled out to the outside of the casing 41 is recovered by the wire collecting device 120. At this time, since the transfer winch 46 is exposed to the outside of the casing 41, it is relatively easy to perform the work of pulling the lead wire 11 and the like, and the maintenance inspection in the middle of the cutting work is easy.

Further, as shown in FIG. 6, a plurality of pulleys 43 provided inside the casing 41 and pulling the lead wires 11 are moved by the brakes 44, and the front side lead wires 11a and the rear side lead wires 11b which actually cut the workpiece 12 are adjusted to the required state. Length or position.

As shown in Fig. 2, in this state, the transfer winch 46 is rotated at a fixed speed, and the lead wires 11 wound thereon are always moved at the same speed. Thereby, the delivery side winch 31 provided in the lead wire feeding device 20 also rotates, and the lead wires 11 are sequentially fed out from the reel 22 of the lead wire feeding device 20. On the other hand, in the lead recovery device 120, the recovery side winch 131 is rotated, and the lead is turned The reel 11 is wound around the recovery side to be recovered.

When the transport winch 46 is rotated, the front lead 11a and the rear lead 11b pulled into the inside of the casing 41 are respectively moved in the longitudinal direction. Therefore, in this state, the lift 42 raises the workpiece 12 together with the mounting base 42a. Further, the workpiece 12 is brought into contact with both the front lead 11a and the rear lead 11b which are moved in the longitudinal direction. Thereafter, the workpiece 12 is also cut by the lead wires 11 by the workpiece 12.

When the workpiece 12 is cut, the tension of the front side lead 11a of the workpiece 12 is adjusted by the delivery side winch 31, and the tension of the rear side lead 11b of the workpiece 12 is cut together with the front side lead 11a by the recovery side winch 131. Adjustment.

The front side lead 11a that moves between the delivery side winch 31 and the transfer winch 46 in a state where the tension is adjusted, and the rear side lead 11b that moves between the transfer winch 46 and the recovery side winch 131 in a state where the tension is adjusted , the workpiece 12 is cut.

Here, the front lead 11a and the rear lead 11b which actually cut the workpiece 12 are constituted by one lead 11. Therefore, the resistance generated when the cutting process of the front side lead 11a of the workpiece 12 is first cut is applied to the rear side lead 11b of the workpiece 12, and the tension of the front side lead 11a and the rear side lead 11b which are cut. There are differences.

On the other hand, in the method of cutting the workpiece by the lead wire according to the present embodiment, the rotation of the feed-side winch 31 is controlled based on the rotation of the transfer winch 46, and the tension of the front lead 11a before the transfer winch 46 is performed. Adjustment. Moreover, the rotation of the recovery side winch 131 is controlled, and the tension of the rear side lead 11b located after the transfer winch 46 is adjusted. Thereby, the tension of the front side lead 11a and the rear side lead 11b can be adjusted separately, and the tension of the front side lead 11a and the rear side lead 11b which cut the workpiece 12 simultaneously can be made uniform. Therefore, the workpiece can be more stably 12 for cutting.

In the wire saw 10 of the present embodiment shown in FIGS. 2 to 5, the lead wires 11 are pulled by a plurality of pulleys 43 inside the casing 41. Thus, the wire saw 10 is different from the conventional wire saw in that a wire saw 11 is pulled in such a manner that one lead 11 travels in the same direction side by side between a plurality of multi-groove rolls.

Further, the wire saw 10 of the present embodiment further includes the brake 44 that moves a part or all of the plurality of pulleys 43, so that the length or position of the front lead 11a and the rear lead 11b and the angle thereof can be freely adjusted. Therefore, even when the size of the workpiece 12, which is the object to be cut, is different, the workpiece 12 having a different size or shape can be cut in accordance with the desired position or shape.

In the present embodiment, the operation in the forward rotation direction of the lead wire 11 sent from the lead feeding device 20 through the transfer winch 46 and recovered by the lead collecting device 120 has been described.

In this case, after the lead wires 11 sent from the lead wire feeding device 20 are all collected by the wire collecting device 120, the wire collecting device 20 is set as the "feeding side", and the wire feeding device 20 is set as the "recycling side". The action in the reverse direction can be. By performing the operation as described above, the operations in the forward rotation direction and the reverse rotation direction can be repeated. Thereby, it is possible to use the wear lead 11 and to perform the cutting process stably in a state where the tension is uniform. Further, workability and productivity of the cutting process can be improved.

According to the above embodiment, the following effects can be exhibited.

The wire saw 10 of the present embodiment includes a lead wire feeding device 20 that feeds the lead wires 11 , a lead wire collecting device 120 that collects the supplied lead wires 11 , and a plurality of cutting portions that pass the lead wire feeding device 20 and the wire lead collecting device The lead 11 between 120 is formed by pulling, and The workpiece 12 is cut; the winch 46 is rotated, and the lead 11 is wound around the lead 11 between the lead feeding device 20 and the lead collecting device 120, thereby moving the lead 11; the sending side winch 31 is set to be fed out. In the apparatus 20, the front side lead 11a on the side of the lead feeding device 20 is rotated in comparison with the transfer winch 46, thereby adjusting the tension of the front side lead 11a; and the recovery side winch 131 is provided on the lead The recovery device 120 rotates in a state in which the rear lead 11b on the side of the lead collection device 120 is wound with respect to the transfer winch 46, thereby adjusting the tension of the rear lead 11b; and a plurality of cut portions It is formed by a front side lead 11a that moves between the delivery side winch 31 and the transfer winch 46, and a rear side lead 11b that moves between the transfer winch 46 and the recovery side winch 131.

Further, in the method of cutting the workpiece 12 by the lead 11 of the present embodiment, the lead wire 11 between the lead feeding device 20 and the lead collecting device 120 is wound around the transfer winch 46 to rotate the transfer winch 46, thereby The lead 11 is moved, and the tension of the front side lead 11a on the side of the lead feeding device 20 is adjusted by the delivery side winch 31. The recovery side winch 131 is further connected to the lead recovery device 120 side than the transfer winch 46. The tension of the rear side lead 11b is adjusted, and the front side lead 11a that moves between the delivery side winch 31 and the transfer winch 46 in a state where the tension is adjusted is used, and the transfer winch 46 and the recovery are performed in a state where the tension is adjusted. The rear side lead 11b, which is moved between the side winches 131, cuts the workpiece 12.

When one lead is folded back to form two leads, and the workpiece is cut by the two leads, the resistance generated during the cutting process of the front lead of the workpiece is first applied to the rear lead after the workpiece is cut. Therefore, the tension between the front lead and the rear lead which are subjected to the cutting process is different. In the wire saw and the method of cutting the workpiece by the lead wire of the present embodiment, the one lead wire 11 is also moved by the transfer winch 46.

In the present embodiment, the rotation of the feed side winch 31 is controlled to adjust the tension of the front lead 11a, and the rotation of the recovery side winch 131 is controlled to adjust the tension of the rear lead 11b. Therefore, the tension of the front side lead 11a and the rear side lead 11b can be adjusted separately. Thereby, the tension of the front side lead 11a and the rear side lead 11b which cut the workpiece 12 at the same time can be made uniform, and the workpiece 12 can be cut more stably.

Further, the wire saw 10 further includes first and second load units 51 and 52 for detecting the tension of the front lead 11a before and after the workpiece 12 is cut, and third and fourth load units 53 and 54 for cutting off The tension of the rear side lead 11b before and after the workpiece 12 is detected; and the controller controls the rotation of the delivery side winch 31 based on the detection outputs of the first and second load units 51 and 52, and according to the third and fourth load units The detection output of 53, 54 controls the rotation of the recovery side winch 131.

The first and second load cells 51 and 52 detect the tension of the front lead 11a before and after the workpiece 12 is cut, and the third and fourth load units 53 and 54 are the tension of the rear lead 11b before and after the workpiece 12 is cut. Test. Therefore, the front lead 11a and the rear lead are made such that the values of the first and third load units 51 and 53 are equal and the values of the second and fourth load units 52 and 54 are also the same. The tension of 11b is adjusted, and a more uniform and uniform cutting process can be performed.

Further, it is preferable that the wire saw 10 further includes a casing 41 that houses the workpiece 12 therein and the transmission winch 46 is exposed to the outside of the casing 41. Further, it is more preferable that the inside of the casing 41 of the jigsaw 10 is provided with an elevator 42 that carries the workpiece 12 to be raised and lowered, and a plurality of pulleys 43 that are disposed above the elevator 42 and that pull the lead wires 11; 44, which moves a part or all of the plurality of pulleys 43.

By providing the transfer winch 46 to the outside of the casing 41, the wiring work of the lead wire 11 or its maintenance inspection is facilitated. Further, by providing the brakes 44 that move the plurality of pulleys 43 that pull the lead wires 11, the workpieces 12 having different sizes or shapes can be cut at a desired position or shape.

The embodiment of the present invention has been described above, but the above embodiment is only a part of the application example of the present invention, and does not mean that the technical scope of the present invention is limited to the specific configuration of the above embodiment.

In the above embodiment, the rotation speeds of the adjustment reels 22 and 122 are changed by the rotation of the elastic adjustment arms 27c and 127c in the tension devices 27 and 127, so that the amount of the lead wires 11 or the amount of recovery is transferred to the transfer winch 46. The case where the amount of movement is adjusted in the same manner will be described.

Alternatively, the controller may detect the output of the lead-out load unit 29 and the recovery lead load unit 129 based on the tension between the lead wires 11 wound between the position detecting mechanisms 26 and 126 and the tension devices 27 and 127. Further, a motor (not shown) that rotates the reels 22 and 122 on the delivery side or the recovery side is controlled. The rotation speed of the reels 22 and 122 can be changed to adjust the amount of the lead 11 to be sent or the amount of recovery of the lead wire 46 to be the same as the amount of movement of the transfer winch 46.

10‧‧‧ wire saw

11‧‧‧ lead

11a‧‧‧ front lead

11b‧‧‧ rear lead

12‧‧‧Workpiece

22‧‧‧Reel

27‧‧‧ Tension device

29‧‧‧Send the load unit for the lead

31‧‧‧Send side winch

32, 33‧‧‧ winding roller

43‧‧‧ pulley

46‧‧‧Transfer winch

47, 48‧‧‧ winding rollers

51, 52‧‧‧1st and 2nd load units

53, 54‧‧‧3rd and 4th load cells

122‧‧‧Reel

127‧‧‧ Tension device

129‧‧‧Recovery load unit for lead

131‧‧‧Recovery side winch

132, 133‧‧‧ winding roller

Claims (5)

A wire saw comprising: a lead supply unit (20) for feeding a lead (11); a lead collecting unit (120) for recovering the fed lead (11); and a plurality of cut portions (11a, 11b), It is formed by pulling the lead wire (11) between the lead supply unit (20) and the lead wire collecting portion (120), and cuts the workpiece (12); and transmits the winch (46), which is wound around The lead wire (11) between the lead supply unit (20) and the lead wire collecting unit (120) is rotated, whereby the lead wire is moved at a fixed speed (11), and the side winch (31) is sent out. The lead supply unit (20) is rotated in a state in which the front lead (11a) on the side of the lead supply unit (20) is wound around the transfer winch (46), thereby adjusting the front side. a tension of the lead wire (11a); and a recovery side winch (131) provided in the lead wire collecting portion (120) and having a rear side lead wire on the lead wire collecting portion side of the transfer winch (46) Rotating in the state of (11b), thereby adjusting the tension of the rear side lead (11b); and the plurality of the cutting portions are provided by the feeding side winch (3) 1) The front side lead (11a) moving between the transfer winch (46) and the rear side lead (11b) moving between the transfer winch (46) and the recovery side winch (131). The wire saw according to claim 1, further comprising: first and second load units (51, 52) for detecting a tension of the front lead (11a) before and after cutting the workpiece (12); Third and fourth load units (53, 54) for cutting the front and rear of the workpiece (12) The tension of the rear lead (11b) is detected; and the controller controls the rotation of the delivery side winch (31) based on the detection outputs of the first and second load units (51, 52), and according to the above 3. The detection output of the fourth load unit (53, 54) controls the rotation of the recovery side winch (131). A wire saw according to claim 1 or 2, further comprising a casing (41) for accommodating the workpiece (12) therein, wherein the transfer winch (46) is exposed outside the casing (41) And set. The wire saw according to claim 3, wherein the inside of the casing (41) is provided with: an elevator (42) that is mounted on the workpiece (12) to be raised and lowered; and a plurality of pulleys (43) provided in the above A lift (42) is pulled over the lead (11); and a brake (44) moves a part or all of the plurality of pulleys (43). A method for cutting a workpiece by a lead, which is obtained by cutting a lead (11) which is fed from a lead supply unit (20) and wound by a lead collecting unit (120); and the cutting method is As described below, the lead wire (11) between the lead supply unit (20) and the lead wire collecting portion (120) is wound around the transfer winch (46) to rotate the transfer winch (46), thereby making the transfer winch (46) The lead wire is moved at a fixed speed (11), and the tension of the front lead wire (11a) on the lead supply portion (20) side of the transfer winch (46) is adjusted by the delivery side winch (31), and the recovery side is used. The winch (131) adjusts the tension of the rear lead (11b) on the lead collecting portion (120) side of the transfer winch (46), and is used in the feed side winch in a state where the tension is adjusted. ) with the above transfer winch (46) a front side lead (11a) that moves between and a rear side lead (11b) that moves between the transfer winch (46) and the recovery side winch (131) in a state where the tension is adjusted, and cuts the above Workpiece (12).