JP5022967B2 - Cutting mechanism of wire saw machine - Google Patents

Description

  The present invention relates to a wire saw machine for cutting a hard material such as stone, ceramic, ingot or the like by contact running of a cutting wire (hereinafter referred to as “wire”), and in particular, a prismatic cut having four side surfaces as wire crossing surfaces. The present invention relates to a cutting mechanism of a wire saw machine that can cut out a large number of wires simultaneously.

  In order to cut a hard material (hereinafter, “object to be cut”) such as a stone material, a ceramic material, or an ingot, a wire saw machine that performs contact travel of a wire is generally used. The wire traveling in the cutting unit mechanism of this wire saw machine reciprocates a predetermined number of times for the purpose of use up to the limit of the cutting function. For this reason, it has been a general configuration for a wire saw machine that a temporary storage mechanism for a wire, called an accumulator, is arranged separately at the front stage and the rear stage of the cutting unit mechanism.

  In a wire saw machine, when cutting a plate with a desired thickness from a block-like high-hardness material, a cutting section that slices each piece while sequentially moving a stretched wire at one pitch corresponding to the desired thickness distance Some have a mechanism, or some have a cutting part mechanism that allows a wire row in which a number of wires are run in parallel and in parallel at an interval of 1 pitch to be moved up and down for the purpose of cutting a plurality of sheets simultaneously. Such a cutting unit mechanism has already been a common mechanism for wire machines.

  In addition, in the wire saw machine, when cutting out the rectangular prismatic body in addition to cutting out the plate, first cut along a certain direction (for example, the X direction) by the general mechanism, and then cut the plate. After setting the direction of the material or the traveling direction of the wire to the Y direction rotated by a predetermined angle along the horizontal plane (a predetermined angle rotation with the vertical direction as the axis), the wire row is lowered and cut in the same manner as described above. The construction method was adopted.

  However, in such a rectangular prismatic cutting method, the lowering movement of the cutting unit mechanism in which the wire row is stretched is required twice in the case of the X-direction cutting and the Y-direction cutting, Since it is necessary to set up to rotate any of the cutting unit mechanisms, the cutting work takes a long time and the variation in cutting dimensions increases.In other words, there are problems in work efficiency and work accuracy, resulting in an increase in work cost. I was invited.

Therefore, in order to solve this problem, the cutting unit mechanism in which the wire row is stretched is separately arranged in the crossing direction, and the crossed wire row is lowered simultaneously to rotate the object to be cut. A mechanism for simultaneously cutting a large number of rectangular prisms is disclosed as a prior art (see, for example, Patent Document 1).
JP-A-3-49863 (page 2-5, FIGS. 1 and 2)

However, the cutting device disclosed in Patent Document 1 (hereinafter referred to as “document disclosure device”) can simultaneously obtain a large number of rectangular prisms, but has the following problems in actual work. .
First, the cutting unit mechanism of this document disclosure device is configured by four grooved rollers arranged in parallel in the vertical and horizontal directions at a predetermined interval on one side (left and right direction in the drawing). One wire is spirally wound at a predetermined pitch so as to circulate to form a wire row, and wire rows having the same configuration are also arranged in the crossing direction.
In such a configuration, the wire is spirally wound between the four rollers facing up, down, left, and right, so that the rotation axis of each groove roller and the traveling direction of the wire are not perpendicular. That is, the groove of the groove roller is formed in a concave shape so as to draw a spiral with a predetermined pitch on the side surface of the roller, and the wire running while engaging with the groove of the groove roller is not necessarily perpendicular to the rotation axis. Therefore, a considerable load is applied to the groove roller in a direction slightly inclined from the axial direction of the wire wound around the groove roller, and these deteriorate the durability of the wire and the groove roller.

  In addition, the cutting unit mechanism of the document disclosure device has a specification configuration in which the wire row that is in direct contact with the object to be cut is orthogonal (crossed at a right angle), but the wire is spirally wound, so that the one-pitch deviation is generated. When the crossing angle is set to a right angle (90 degrees) accurately, the four rollers having the above-described configuration are stretched over the grooved rollers arranged opposite to each other. There was a trouble of appropriately correcting the direction of the groove roller shaft with respect to the workpiece. And since the size of the prismatic body to be cut out is determined by the width of this pitch, in order to correspond to the prismatic body of various sizes, it is necessary to set up each time, and it must be said that it is very complicated. It was.

  Furthermore, when the crossing directions are handled by separate wire travels, a complicated mechanism that synchronizes in the crossing direction in consideration of the cutting depth is also required, and when this is done with a single wire connected in series Since the distance of the wire reciprocated by the cutting unit mechanism becomes long, many sensors and incidental facilities are required for the setting of synchronization of the moving speed and the setting of uniform tension. For this reason, the document disclosure apparatus is a complicated and low-reliability apparatus as a whole, and practically has low industrial applicability.

  Furthermore, since a wire array is formed by winding a wire around a number of grooves formed on the groove roller, if the groove formation accuracy (such as the pitch of the spiral groove) is not uniform, The contact state is not stable, for example, an unnecessary load due to slipping or shaking (chatter) in a specific groove is generated, and the tension of the wire row is varied. Since each of the groove rollers is a single cylindrical body, there is a disadvantage that correction for eliminating the load for each wire row cannot be performed. Combined with these, various problems such as damage to the bearings of the groove roller, deformation of the specific groove, destruction of the groove roller, reduction of cutting accuracy (dimensional displacement of the prismatic body cut out by pitch displacement), and wire breakage may occur. It was.

  In order to avoid such a problem, the literature disclosure apparatus has a complicated apparatus such as a microcomputer-controlled apparatus that constantly monitors and adjusts the rotational speed of the groove roller, the winding speed of the wire, the tension and the tension state of the wire. It was. This lowered the stability and durability of the device, while increasing the cost of the device.

  Accordingly, the present invention has been made to solve these problems by focusing on these problems, and is a rectangular prismatic body without being rotated to obtain the cutting position of the workpiece while having a simple configuration. It is intended to provide a wire saw machine cutting part mechanism capable of simultaneously cutting a large number of pieces in a single cutting step.

In order to solve the above problems, the cutting mechanism of the wire saw machine of the present invention is configured as follows.
That is, the cutting part mechanism (3) that cuts the workpiece (T) by the contact running of the stretched wire (W), and the cutting part mechanism (3) arranged at the front part and the rear part, respectively. An accumulator (6) for temporarily storing a wire (W) for reciprocating travel within the cutting unit mechanism, a wire supply unit (5) for supplying the wire (W) to one accumulator (6), and the other accumulator ( 6) The wire recovery section (7) for recovering the wire (W) from the above, and the above-mentioned cutting section mechanism (3) of the wire saw machine, respectively, in the orthogonal direction on the same plane at intervals across the object (T) Two pairs of rotating bodies (32) arranged opposite to each other and rotating the drive shaft, and a plurality of parallel rotating along the axial direction of the rotating body (32) with reciprocating between the rotating bodies facing each other and repeatedly stretching them. Arranged so that A series of wires (W), and a plurality of idler pulleys (35) arranged in a plurality of strips of the wires (W) and wound to return the wires (W) to the opposite side. , And is characterized by comprising.

  The cutting part mechanism (3), the accumulator (6), the wire supply part (5), and the wire recovery part (7) are reciprocatingly moved, or the wire (W) wound around them is connected in series. And is supplied from the wire supply unit (5) to the cutting unit mechanism (3) through the accumulator (6), and the cutting unit mechanism (3) forms a plurality of parallel strips by the rotating body (32) and the idler pulley (35). After being used for cutting, it travels again in the order in which it is recovered by the wire recovery part (7) via the accumulator (6).

  The wire (W) in the cutting unit mechanism (3) is arranged so that the rotating bodies (32) face each other in the orthogonal direction. ), And this wire row is located on the surface facing the workpiece (T) and forms a wire crossing surface 36 that reciprocates.

  In the cutting part mechanism (3), the wire (W) wound around one end of the rotating body (32) is connected to the end of the rotating body (32) orthogonal to the rotating body (32). It is characterized by having feeding means (35a) for feeding to By the arrangement of the feeding means (35a), the wire (W) smoothly travels between the end portions of the rotating body (32) arranged orthogonally.

  Each idler pulley (35) is characterized in that its rotation surface can be adjusted along the traveling direction of the wire (W). That is, each idler pulley (35) changes the direction while winding the wire (W) sent out from the rotating body (32), and sends the wire toward the specific idler pulley (35) arranged opposite to each other. It has an adjusting means for appropriately rotating or linearly moving with respect to the wire crossing surface (36) of the row. Such an adjusting means is disposed on a bracket (35c) that supports the idler pulley (35). A plurality of winding grooves (35b) may be formed in the idler pulley (35).

  The rotating body (32) is configured by arranging a large number of driving pulleys (32a) around which a wire (W) is wound in the axial direction at a predetermined interval, and is constituted by an object to be cut (T) and a rectangular prismatic body to be cut out. The intervals between the drive pulleys (32a) may be set to different intervals instead of equal intervals. A large number of winding grooves (32b) may be formed in the drive pulley (32a) in the same manner as the idler pulley (35).

  In the cutting part mechanism (3), the distance between the two pairs of rotating bodies (32) arranged to face each other in the orthogonal direction can be set to different lengths in the orthogonal direction.

  Further, the two pairs of rotating bodies (32) arranged to face each other in the orthogonal direction are characterized in that they are synchronously rotated by a rotational driving force that is synchronously divided from a single driving source (33). With this configuration, the traveling speed of the wire (W) wound around each rotating body (32) is constant, and the reciprocating traveling state is stabilized.

  Since the cutting part mechanism of the wire saw machine of the present invention is configured as described above, the wire reciprocating travel in the cutting part mechanism, the initial setting of cutting conditions such as tension and tension, adjustment during cutting work, etc. Can be individually dealt with in each idler pulley disposed corresponding to each rotating body and the driving pulley of each rotating body.

  Specifically, in the cutting unit mechanism, a wire crossing surface is formed from a plurality of parallel wire rows using a series of wires, and therefore, the wire crossing direction between two pairs of rotating bodies While the angle is set to be a right angle, the direction in which the wire between the idler pulleys is stretched is set to have a predetermined angle with respect to the direction in which the rotor is stretched. For this reason, for example, the cutting conditions change due to deformation of the winding groove of the rotating body or peeling of the cutting means coated on the wire during the cutting operation, causing problems such as slipping or vibration (chatter) in the wire at a specific site. However, it is possible to take measures to suppress the problem by changing the winding groove of the specific rotating body corresponding to this part, and particularly adjusting the rotating surface and the arrangement position of the specific idler pulley.

  By such individual adjustment, mechanical failure such as overall bearing breakage and wire breakage of the rotating body and idler pulley can be suppressed, and the control mechanism for monitoring and controlling the reciprocating speed and tension of the wire can be simplified. It becomes. This greatly contributes to the cost reduction of the cutting unit mechanism and, consequently, the cost reduction of the entire wire saw machine.

  In addition, the position of the specific rotating body and idler pulley can be adjusted, for example, when the material of the workpiece is changed and the cutting conditions need to be finely adjusted. Since it can respond without performing, it becomes possible to set a cutting condition quickly compared with the literature disclosure device, and the efficiency of so-called setup replacement work is greatly improved. In addition to this effect, it is possible to easily and appropriately change the cutting dimension at a specific part of the workpiece, so that rectangular prisms of different dimensions can be separated from one workpiece, and various types of production are possible. The effect of improving production efficiency from the standpoint is remarkable.

  Furthermore, when the distance between the rotating bodies is set to a different length in the orthogonal direction (XY direction), the span (stretching distance) differs between the X direction and the Y direction even if the tension on the wire is the same. For this reason, the amount of bending that occurs in the wire row in the X direction that occurs when it contacts the workpiece is different from the amount of bending that occurs in the wire row in the Y direction. This is because, until just before contacting the object to be cut, the orthogonal wire rows are in contact with each other on the same plane, but when the cutting is started, the amount of bending differs, so the crossed wires are in contact with each other. Is eliminated, and the corner of the rectangular prism is cut with a time difference. As a result, the corner portion having low rigidity is not subjected to the cutting load from two directions at the same time, so that breakage is avoided, and the finished dimensional accuracy as a rectangular prismatic body is improved.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a cutting unit mechanism of a wire saw machine (hereinafter referred to as “the present machine”) according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing the overall configuration of the machine, FIG. 2 is a schematic perspective view showing a wire stretched state in the machine, and FIG. 3 is a sectional view taken along line AA in FIG. 4 is a partially cutaway view of the cutting unit mechanism taken along line CC, as viewed in the direction of the arrow B in FIG. 3, FIG. 5 is a partial enlarged view of DD in FIG. 4, and FIG. FIG. 7 is an assembly perspective view of the rotating body of the cutting unit mechanism, FIG. 8 is an operation explanatory view of the cutting unit mechanism, and FIG. 9 is a partially cutaway view showing the accumulator of this machine. It is a perspective view. 4 and 5 are notched along the line CC, so that a part of the rotating body described later in the description of the cutting unit mechanism is exposed.

  The machine 1 mainly cuts a rectangular prism from a workpiece T (hereinafter referred to as “workpiece”) by causing a wire W having a surface coated with cutting means made of abrasive grains or a hard material to contact and run. A cutting section mechanism 3 (to cut out or separate), an accumulator 6 that temporarily stores a wire W that is disposed in the front and rear stages of the cutting section mechanism 3 to reciprocate in the cutting section mechanism; A wire supply unit 5 for supplying a new wire W to the accumulator 6 in a part, a wire recovery unit 7 for recovering a used wire W to be discarded from the accumulator 6 in a rear stage, and a structure for supporting these And a basic frame 2.

  The wire W used in the machine 1 is one connected in a series. As shown in FIG. 2, the wire W supplied from the supply bobbin 51 of the wire supply unit 5 passes through the supply motor 52. The accumulator 6, the cutting unit mechanism 3, and the accumulator 6 are connected again in series so as to follow the path of recovery to the recovery bobbin 71 via the recovery motor 72. In particular, in the cutting unit mechanism 3, the wire W forms a plurality of parallel wire rows having a predetermined interval, and a wire intersection surface 36 is formed in which the wire rows are orthogonal to each other on a plane facing the workpiece T. . Moreover, in the cutting | disconnection part mechanism 3, it is the arrangement | positioning by which a short side wire row | line is wound outside so that the long side wire row | line may be covered.

  First, the basic frame 2 is a structural member having rigidity capable of supporting the components of the machine 1 and constructing the whole. In the construction example of the machine 1, a rectangular frame is formed with a square pipe on the upper surface of three rectangular plate-like base plates 21, and four rectangular pipes that are erected and open on one side on the long side are arranged on the upper frame. A support plate 22 is disposed on the upper end surface of each of the projecting square pipes. A rectangular plate-like upper board 23 is installed so as to close the lower frame surface, and a work table 24 is disposed on the upper board 23. The work table 24 is configured to move up and down by the actuators 24a that are arranged at four positions while holding the work T fixedly. The work T of the machine 1 is two rectangular pillars arranged in parallel in the longitudinal direction of the foundation frame 2, and is carried in and out from the opening side of the foundation frame 2 by a conveying means such as a forklift.

  Next, the cutting unit mechanism 3 that is the main focus of the present invention will be described. The cutting unit mechanism 3 is disposed on the upper side of the basic frame 2 via a support plate 22. The cutting unit mechanism 3 includes a rectangular frame 31 having a size that surrounds the periphery of the two workpieces T, and two pairs of rotating bodies 32 that are arranged to face the lower surface side of the opposite frame sides of the frame 31. .., And a plurality of idler pulleys 35, 35,... Arranged on the upper surface side of the opposite frame side of the frame 31.

  The frame 31 has a rectangular pipe combined in a rectangular shape so as to have an opening 31a having a size surrounding the work in a top view, and an upper plate 31b having an opening portion of approximately the same size as the opening 31a on the upper and lower surfaces and a lower portion The plate 31c is fixed.

  The rotating bodies 32 are arranged in a suspended manner in pairs so as to surround the opening 31a of the frame 31 on a lower plate 31c fixed to the lower surface side of the opposite frame side of the frame 31. The rotator 32 is formed by connecting and integrating a plurality of drive pulleys 32a each having a winding groove 32b around which the wire W is wound, coaxially in the frame side direction and with a predetermined interval (span). The plurality of drive pulleys 32a are integrated. It is the structure which rotates automatically. In the cutting unit mechanism 3 of the machine 1, as a result of setting the drive pulleys at equal intervals, the vertical and horizontal dimension ratios of the cut dimensions of the workpiece T are the same. However, depending on each rotating body 32, the drive pulley 32 a It is also possible to change the cutting dimension ratio of the workpiece T by changing the interval.

  Since each rotating body 32 is arranged so as to surround the rectangular opening 31a of the frame 31 as described above, the rotating bodies 32 are orthogonal to each other on the same plane, and the intervals are different in different facing directions. More specifically, the rotating body 32 arranged on the long side connects 10 driving pulleys 32a, and the rotating body 32 arranged on the short side connects 5 driving pulleys 32a, each having a plurality of brackets 32c. Are fixed to the lower plate 31c.

  In addition, one set of the long-side rotating body 32 and the short-side rotating body 32 is configured to rotate synchronously by connecting one end portion side to the gear box 32e. A timing pulley 32d having the same configuration is fixed to each of the combined short-side rotating bodies 32, 32 by extending one end side. A timing belt 34 driven by a drive motor 33 is engaged with each timing pulley 32d. With this configuration, the rotational driving force of the driving motor 33 is transmitted to the rotating body 32 via the timing belt 34, and all the driving pulleys 32a are rotated in a predetermined direction in conjunction with each other. In addition, the gear of the gear box 32e is set so that the shaft rotation direction of the drive pulley 32a is the same in the rotating body 32 arranged to be opposed.

  The idler pulley 35 is arranged in an upright manner on the upper plate 31 b fixed to the frame body 31. The idler pulley 35 has the same number as the drive pulley 32a of the rotating body 32 and has a winding groove 35b around which the wire W is wound. The axis that forms the rotation surface of the idler pulley 35 is the axis of the drive pulley 32a. It is rotated at predetermined angles θ1 and θ2 with respect to the wire crossing surface 36. Specifically, between the idler pulleys arranged to face each other, the feeding direction of the wire W received from the drive pulley 32a is rotated so as to shift to the idler pulleys 35 adjacent to each other. In other words, the traveling directions of the wires W are orthogonal to each other at the lower wire intersection surface 36 with respect to the frame 31, but the traveling directions of the wires W between the upper idler pulleys 35 are perpendicular to each other by a predetermined angle θ 1, θ 2. I'm trying to cross it with a gap.

  About a part of idler pulley 35, the axial center direction is rotated exceeding said (theta) 1 and (theta) 2, and is arrange | positioned. This idler pulley is a feeding idler pulley 35a, which is a total of three, one at the corner of the frame 31 near the accumulator 6 on the wire supply side and two at the corner on the diagonal of this corner. Is arranged. These idler pulleys 35a for feeding smoothly feed the wire W from the accumulator 6 on the wire supply unit side to the cutting unit mechanism 3, and the length of the wire W wound around the end portion of the rotating body 32 on the short side. Smooth delivery to the end of the rotating body 32 on the side functions as a feeding means.

  The idler pulley 35 is supported by a bracket 35c as a single unit or at least two as a set independently of each other. That is, each idler pulley 35 can set the rotation surface and adjust the position on the frame side for each bracket. For this reason, it becomes possible to adjust the tension and the feeding direction of the wire W fed upward from the drive pulley 32a of the rotating body 32 that rotates integrally with each bracket unit that supports the idler pulley 35, so that the wire during cutting can be adjusted. Even when a problem such as vibration (chatter) of W occurs, it is possible to individually adjust the idler pulley 35 at the corresponding portion to cope with it. This individual adjustment can also be applied to changing cutting conditions by changing the workpiece material.

  Further, for example, as shown in FIG. 8, when there are a plurality of winding grooves 32b of the drive pulley 32a, the idler pulley 35 changes the workpiece cutting dimension to extend the life of the winding groove 32b (from x1 to x2). When the groove position for winding is changed, the frame side direction position (arrow d) and the rotation position (arrow r) of the bracket 35c of the idler pulley 35 corresponding to the drive pulley 32a are adjusted, and the wire Fine adjustment of W tension and feed direction is possible. Alternatively, a plurality of winding grooves 35b may be formed in advance in the idler pulley 35 as one of countermeasures.

  The cutting part mechanism 3 having the above-described configuration is provided with a substantially H-shaped guide frame 4 so as to straddle the longitudinal side of the upper part of the frame. The guide frame body 4 includes one place for guiding from the accumulator 6 on the wire supply section side to the cutting section mechanism 3 and three sections for guiding the wire W fed from the cutting section mechanism 3 to the accumulator 6 on the wire recovery section side. A total of four guide pulleys 41 are provided.

  Next, the wire supply part 5, the wire collection | recovery part 7, and the accumulator 6 are demonstrated. First, the wire supply unit 5 includes a supply bobbin 51 around which a new wire W is wound by a predetermined amount, and a supply motor 52 that winds the wire W from the supply bobbin 51 in an approximately eight-letter shape and rotates it intermittently. And consists of.

  On the other hand, the wire recovery unit 7 receives the waste wire W sent from the accumulator 6 in a substantially eight-letter shape and intermittently rotationally drives the waste motor W and the waste wire W sent from the recovery motor 72. The recovery bobbin 71 is wound in a fixed volume.

  In the wire supply unit 5 and the wire recovery unit 7 described above, the arrangement of each component is reversed with respect to the viewpoint of the wire W delivery direction. In other words, each element is disposed in a so-called mirror relationship in which each element faces the central cross section of the machine 1.

  The accumulator 6 is disposed at two locations, the front stage and the rear stage, of the cutting unit mechanism 3 so as to be interposed between the wire supply unit 5 and the wire recovery unit 7 and the cutting unit mechanism 3. .

  The accumulator 6 has the same configuration in both the front stage and the rear stage, and a stationary pulley group 62 that winds the wire W from the supply motor 52 or the cutting unit mechanism 3 approximately half a circle is arranged on the upper side of the vertically installed lifting frame 61. Below the group 62, an elevating pulley group 63 for winding the wire W fed from the stationary pulley group 62 is disposed. The elevating frame 61 is formed with a guide groove 61a having a C-shaped cross section in the longitudinal direction of the vertical center, and a stationary pulley group 62 is fixed in the guide groove, and an elevating carriage 63a holding the elevating pulley group 63 below the fixed pulley group 62. Are arranged to be movable up and down. The stationary pulley group 62 and the elevating pulley group 63 are configured by overlapping a plurality of pulleys having winding grooves having the same diameter and the same thickness so as to rotate independently on the same axis. The stationary pulley group 62 of the machine 1 has a six-tiered configuration, and the lifting pulley group 63 has a five-tiered configuration.

  In the stationary pulley group 62 and the lifting pulley group 63 configured as described above, the wire W fed from the supply motor 52 or the cutting mechanism 3 is first wound around the stationary pulley group 62 and then alternately half a turn around the lifting pulley group 63. Winding, that is, winding to draw a spiral in accordance with the number of pulley stages overlapped with both ends as ends, the terminal ends are sent to the cutting unit mechanism 3 or the recovery motor 72 as a stationary pulley group 62.

With this configuration, the accumulator 6 on the wire supply unit side temporarily stores a new wire W having a predetermined length obtained from the wire supply unit 5 and supplies it to the cutting unit mechanism 3 as appropriate. On the other hand, the accumulator 6 on the wire recovery unit side temporarily stores a predetermined length of the wire W sent from the cutting unit mechanism 3 and sends it to the wire recovery unit 7 as appropriate. Due to the winding relationship of the wire W, the accumulator 6 moves up and down the pulley group 63 when the stored amount of the wire W is small (arrow a), and moves down when the stored amount is large. (Arrow b) functions to absorb the slackness of the wire W and to obtain a predetermined tension by this lifting action.
[Action]

  Next, the operation of the machine 1 and the cutting unit mechanism 3 configured as described above will be described. In the following description, the longitudinal direction of the rectangular cutting unit mechanism 3 is used as the X direction, and the short direction is used as the Y direction.

  First, the work T is placed and fixed on a work table 24 disposed below the cutting unit mechanism 3. And the drive motor 33 is rotationally driven, the rotational driving force is transmitted to the rotary body 32 of the cutting | disconnection part mechanism 3 via the timing belt 34, and the wire W wound around this is run. At this time, the traveling direction of each wire row of the cutting unit mechanism 3 is the same in both the X direction and the Y direction. The drive motor 33 is driven to rotate in the reverse direction after a predetermined amount of rotation or after a predetermined time of rotation, thereby causing the wire W to run backward. By forward / reverse switching of the drive motor 33, a predetermined amount of wire W reciprocates in the wire row, and this wire row forms a wire crossing surface 36 perpendicular to the X direction and the Y direction. Then, the workpiece T is pressed against the wire intersection surface 36 by raising the workpiece table 24, and is collectively cut into a plurality of rectangular prisms according to the number of wires. At the time of contact cutting between the wire W and the workpiece T, a polishing liquid in which an abrasive and water are mixed is sprayed on the contact portion by the arranged nozzle (not shown). Further, around the work T, a cover for preventing and collecting the polishing liquid is disposed (not shown).

  At the time of the above cutting, the distance between the two pairs of rotating bodies 32 arranged opposite to the frame body 31 is set to different lengths in the X direction and the Y direction, so the tension on the wire W in each direction is the same. Even so, the amount of bending in the X direction and the amount of bending in the Y direction that occur when contacting the workpiece T will be different. Therefore, until just before contacting the workpiece T, the orthogonal wire rows are on the substantially same plane and are in contact with each other, but when the cutting is started, the amount of bending differs, so that the intersecting wires W are separated from each other. More specifically, the X-direction wire row with a large amount of bending is separated from the Y-direction wire row, and the contact state is eliminated. That is, the cutting of the workpiece T in the X direction and the Y direction has a time difference. In particular, the cutting action in two directions does not act on the corner of the rectangular prism body at the same time. Is avoided, and the finished dimensional accuracy is improved.

In such a cutting process, the accumulator 6 disposed before and after the cutting unit mechanism 3 operates as follows.
First, the winding state of the wire W of the accumulator 6 on the wire supply unit side will be described. After the wire W sent out from the supply bobbin 51 of the wire supply unit 5 is wound approximately half a circumference on the upper side of the distal end side pulley farthest from the lifting frame 61 of the stationary pulley group 62 via the pulley of the supply motor 52. The elevating pulley group 63 is wound around the lower half of the pulley on the tip end side, and further spirally wound in order toward the stationary pulley group 62 and the elevating pulley group 63 and the elevating frame side, and finally the elevating frame 61 Is sent from the pulley of the stationary pulley group 62 closest to the guide pulley 41 on the cutting unit mechanism side.

  Next, the winding state of the wire W of the accumulator 6 on the wire collection side will be described. The wire W fed from the guide pulley 41 on the cutting unit mechanism side is wound approximately half a circumference around the upper part of the pulley closest to the lifting frame 61 of the stationary pulley group 62 and then closest to the lifting frame 61 of the lifting pulley group 63. The pulley is wound substantially semi-circularly on the lower side of the pulley, further spirally wound in order toward the distal end side with the stationary pulley group 62 and the lifting pulley group 63, and finally the distal end side of the stationary pulley group 62 farthest from the lifting frame 61 The pulley is wound around a recovery bobbin 71 via a recovery motor 72.

  With this winding state, a predetermined amount (predetermined length) of the wire W is stored in the accumulator 6. For this reason, as the drive motor 33 is driven to rotate and the wire W of the cutting unit mechanism 3 travels in one direction, the wire W of one accumulator 6 is sent out (or wound up) to the cutting unit mechanism 3. Since the turn amount decreases, the lift pulley group 63 held by the lift carriage 63a is raised (arrow a), and the lift pulley group 63 of the other accumulator 6 is fed by the wire W from the cutting mechanism 3 and is wound. Falls to increase (arrow b). When the drive motor 33 is driven to rotate in the reverse direction to run the wire W in the reverse direction, the one raising / lowering pulley group 63 descends (arrow b) and the other descending raising / lowering pulley group 63 rises. (Arrow a). That is, in conjunction with the reciprocating travel of the wire W of the cutting unit mechanism 3, the lifting pulley group 63 of each accumulator 6 alternately repeats the lifting action.

  The supply motor 52 and the recovery motor 72 rotate in conjunction with the drive motor 33 during a cutting operation in which the wire W is in a reciprocating traveling state, and supply a predetermined amount of the new wire W and recover the waste wire W. That is, if the amount of movement of the wire W in the forward path is set to be larger than the amount of movement in the return path, a predetermined amount of the new wire W is always supplied to the cutting unit mechanism 3. The supply amount of the new wire W is set in consideration of the material, size, thickness and the like of the workpiece T. In addition, the amount of movement of the wire W in the forward path is set to the same amount as the amount of movement in the return path, and after the cutting operation by the cutting unit mechanism 3 is completed, all the wires W used for the cutting operation are collected, and then the new wire W May be supplied.

  The accumulator 6 during the cutting operation is lifted and lowered while the lifting pulley group 63 is suspended and held by the travel of the wire W by the drive motor 33 of the cutting unit mechanism 3. In other words, the tension of the wire W that contributes to the cutting of the workpiece T in the cutting unit mechanism 3 is appropriately set according to the balance of the weight of the lifting pulley group 63 of the accumulator 6.

It is a perspective view which shows the whole structure of this machine. It is a schematic structure perspective view which shows the stretched state of the wire in this machine. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. FIG. 4 is a view taken in the direction of the arrow B in FIG. FIG. 5 is a DD enlarged view of FIG. 4. It is an assembly perspective view of a cutting part mechanism. It is an assembly perspective view of the rotary body of a cutting part mechanism. It is operation | movement explanatory drawing of a cutting part mechanism. It is a partially cutaway perspective view showing an accumulator of the machine.

Explanation of symbols

1 Machine 2 Base frame 21 Base plate 22 Support plate 23 Upper plate 24 Work table 24a Actuator 3 Cutting mechanism 31 Frame body 31a Opening 31b Upper plate 31c Lower plate 32 Rotating body 32a Drive pulley 32b Winding groove 32c Bracket 32d Timing pulley 32e Gear box 33 Drive motor 34 Timing belt 35 Idler pulley 35a Feed idler pulley 35b Winding groove 35c Bracket 36 Wire crossing surface 4 Guide frame body 41 Guide pulley 5 Wire supply part 51 Supply bobbin 52 Supply motor 6 Accumulator 61 Elevating frame 61a Guide Groove 62 Stationary pulley group 63 Lifting pulley group 63a Lifting carriage 7 Wire recovery part 71 Recovery bobbin 72 Recovery motor W Wire T Workpiece

Claims (4)

A cutting unit mechanism (3) that cuts the workpiece (T) by contact running of the stretched wire (W);
An accumulator (6) for temporarily storing a wire (W) for reciprocating travel in the cutting portion mechanism by being arranged at the front stage portion and the rear stage portion of the cutting portion mechanism (3);
A wire supply unit (5) for supplying a wire (W) to one accumulator (6);
A wire recovery part (7) for recovering the wire (W) from the other accumulator (6);
In the cutting part mechanism (3) of the wire saw machine comprising:
Two pairs of rotating bodies (32) that are arranged to face each other in the orthogonal direction on the same plane at intervals across the workpiece (T) and rotate axially with a driving force;
A series of wires (W) arranged so as to be a plurality of parallel strips along the axial direction of the rotator (32) at predetermined intervals, reciprocating between the opposing rotators and repeatedly stretching;
A plurality of idler pulleys (35) wound around each of the plurality of strips of the wire (W) and arranged with independent rotating shafts,
The idler pulley (35) is installed so as to be inclined along the traveling direction of the wire (W) to the opposite side to which the rotating surface is linked , and the orientation of the rotating surface of each idler pulley (35) is adjusted. It is possible to individually adjust the mounting position of the rotating shaft and adjust the winding position of the wire in the rotating shaft direction.
In addition, a large number of drive pulleys (32a) for winding the wire (W) are arranged in the axial direction at predetermined intervals in the rotating body (32), and each drive pulley (32a) is provided with a plurality of winding grooves (32b). 35b), a wire saw machine cutting section mechanism. The idler pulley (35)
The cutting mechanism of the wire saw machine according to claim 1, comprising a plurality of winding grooves (35 b) . Two pairs of rotating bodies (32) arranged to face each other in the orthogonal direction,
The wire saw machine cutting part mechanism according to claim 1 or 2, wherein the cutting parts are arranged at different distances . Two pairs of rotating bodies (32) arranged to face each other in the orthogonal direction,
4. The wire saw machine cutting part mechanism according to claim 1, wherein the mechanism is rotated synchronously by a rotational driving force synchronously divided from a single drive source .

Images