JP5603683B2 - Method of cutting work by band saw machine and band saw machine - Google Patents

Description

  The present invention relates to a method for cutting a long workpiece by a band saw and a band saw used for the method, and more specifically, a cutting method for cutting a long workpiece at two locations simultaneously to divide the workpiece into three, and It relates to a band saw machine.

  Conventionally, when a long workpiece is cut by a horizontal band saw machine or a saddle type band saw machine having an endless band saw blade, it is common to cut one part of the workpiece. That is, when a cut piece having a desired dimension is cut from a long workpiece, the cut piece is cut and separated. Therefore, there has been a problem in improving efficiency. In a state where a plurality of workpieces are bundled, a plurality of workpieces are also cut at the same time. In this case, the workpiece to be cut has a relatively small diameter. Further, since a plurality of pieces are bundled and cut, there is a problem that when the cut pieces after cutting are conveyed, the plurality of pieces in a bundled state may be separated.

  By the way, as a prior example considered to be related to the present invention, there are Patent Documents 1 and 2, for example.

JP-A-57-12002 Japanese Patent Laid-Open No. 4-289019

  The patent document 1 describes a configuration in which when a workpiece is cut by running and rotating an endless band saw blade, the workpiece is cut by two places of an outward cutting portion and a backward cutting portion in the band saw blade. . However, in the configuration described in Patent Document 1, since the workpieces to be cut in the forward path cutting portion and the backward path cutting portion are separate workpieces, the cutting conditions may differ depending on the workpiece, and handling of the cut piece after cutting There is a problem such as having to be done separately.

  Patent Document 2 also describes a configuration in which the workpiece is cut simultaneously by the forward path cutting portion and the backward path cutting portion of the band saw blade. The workpieces to be cut at the forward path cutting portion and the backward path cutting portion are separate workpieces. Therefore, it has the same problem as that of Patent Document 1.

The present invention has been made in view of the conventional problems as described above, and is a band saw machine having an endless band saw blade wound around a drive wheel and a driven wheel that are rotatably provided separated from each other left and right or up and down. a is, above or the side of the support base for supporting the elongated workpiece, a mobile frame with movably direction toward and away from the workpiece, Ru comprises freely rotating the driving wheel and a driven wheel And first and second motors for individually driving and rotating the drive wheel and the driven wheel, and the tooth tips of the forward path cutting portion and the backward path cutting portion in the band saw blade wound around the drive wheel and the driven wheel are set in the workpiece direction. Yes towards, and the forward cutting portion and backward cutting unit is arranged in the same plane, which acts simultaneously on the same workpiece tare is, tip side of the tip end side to the sandwiching of the workpiece And chair apparatus, and the intermediate vise assembly to an intermediate portion sandwiched and fixed the said workpiece, and is characterized in that it comprises a material vise assembly for holding the material side of the workpiece.

  According to the present invention, the workpiece is divided into three parts by simultaneously cutting two different portions of the long workpiece by the forward cutting portion and the backward cutting portion in the endless band saw blade. It is possible to cut the cut pieces of the same length as the same dimension, or cut the lengths of the pieces in different lengths. Therefore, it is possible to efficiently cut and separate a plurality of pieces from the same workpiece.

  Moreover, the cutting conditions in the forward path cutting portion and the backward path cutting portion in the band saw blade are the same, and the workpiece can always be cut under appropriate cutting conditions. Therefore, the life of the band saw blade can be improved. The cut pieces after cutting are in a state of being aligned in a line in the longitudinal direction of the workpiece, and the cut pieces can be easily carried out.

It is front explanatory drawing which showed notionally and schematically the whole structure of the band saw machine which concerns on embodiment of this invention. It is plane explanatory drawing which showed notionally and schematically the structure of the main part of a band saw machine same as the above. It is operation | movement explanatory drawing of the structure which adjusts the space | interval dimension of the outward path | route cutting part and return path cutting part in a band saw blade.

  As shown conceptually and schematically with reference to FIG. 1, a band saw 1 according to an embodiment of the present invention includes a base frame (support base) 3, and on the support base (base frame) 3. Is provided with a vise device 5 that can hold and fix a long workpiece W. As shown in FIG. 2, the vise device 5 includes a tip vise device 5A for clamping and fixing the tip side of the workpiece W, an intermediate vise device 5B for clamping and fixing the intermediate portion, and a material side of the workpiece W. The material vice apparatus 5C for pinching and fixing is arranged in a line in the front-rear direction (Y-axis direction).

  Each of the vice devices 5A, 5B, and 5C includes a fixed vise jaw 7A fixed on the base frame 3, and a movable vise jaw 7B that is movable in a direction approaching and moving away from the fixed vise jaw 7A. Further, each of the vice devices 5A, 5B, 5C includes a reciprocating actuator 9 such as a hydraulic cylinder for reciprocating the movable vise jaw 7B. In addition, since the structure of the vice apparatus 5 is well-known, the detailed description about the structure of the vice apparatus 5 is abbreviate | omitted. Further, since the material feeding device that feeds the workpiece W in the longitudinal direction (front-rear direction) may have a well-known configuration in, for example, a horizontal band saw machine, the configuration and operation of the material feeding device are detailed. The detailed explanation is omitted.

  Left and right side frames 11L and 11R are erected on both sides in the left and right direction (X-axis direction) of the base frame 3, and the upper portions of the side frames 11L and 11R are integrally connected by an upper frame 13. .

  Further, guide members 15 in the vertical direction are provided inside the side frames 11L and 11R, respectively. A movable frame 19 can be moved up and down via the slider 17 on the guide members 15, that is, the workpiece W can be moved to the workpiece W. On the other hand, it is guided and supported so as to be movable in the direction of approaching and separating. A reciprocating device 21 such as a hydraulic cylinder is provided in the upper frame 13 in order to reciprocate the moving frame 19 in a direction approaching and moving away from the workpiece W (vertical direction in the present embodiment). It has been.

  Therefore, by operating the reciprocating device 21, the moving frame 19 is moved up and down, that is, reciprocated in a direction approaching and separating from the workpiece W.

  On the lower surface of the moving frame 19, that is, on one side of the side surface in the workpiece W direction, a drive wheel 25 that is rotated by the first motor 23A is provided so as to be horizontally rotatable. On the other side of the lower surface of the moving frame 19, a left and right guide portion 27 is provided, and a slider 29 is guided and supported by the guide portion 27 so as to be movable in a direction approaching and moving away from the drive wheel 25. ing. The slider 29 is rotatably provided with a driven wheel 31 that is rotated by a second motor 23B attached to the slider 29. The second motor 23B can be omitted.

  The drive wheel 25 and the driven wheel 31 are wound with an endless band saw blade 33 with a tooth tip directed in the workpiece W direction without being twisted (twisted). In order to apply tension to the band saw blade 33, a fluid pressure cylinder 37 as an example of tension applying means is attached to the bracket 35 fixed to the moving frame 19. A piston rod 37 </ b> R that is reciprocally movable is connected to the slider 29. Therefore, by operating the fluid pressure cylinder 37, the slider 29 and the driven wheel 31 are moved toward and away from the drive wheel 25, and are wound around the drive wheel 25 and the driven wheel 31. Thus, tension can be applied to the band saw blade 33.

  As already understood, when the first and second motors 23 </ b> A and 23 </ b> B are synchronously rotated to cause the drive wheel 25 and the driven wheel 31 to rotate synchronously, the band saw blade 33 that is wound around the drive wheel 25 and the driven wheel 31. Is rotated horizontally (running turning).

  Therefore, in FIG. 2, the band saw blade 33 is provided with an outward cutting portion 33A that travels horizontally in the right direction and a backward cutting portion 33B that travels horizontally in the left direction, spaced apart in the front-rear direction. Therefore, if the moving frame 19 is lowered while the band saw blade 33 is kept running and rotated, the workpiece W that is long in the front-rear direction is positioned at a different position of the workpiece W by the forward path cutting portion 33A and the backward path cutting portion 33B in the band saw blade 33. Are to be cut at the same time.

  That is, the band saw blade 33 is wound around the drive wheel 25 and the driven wheel 31 without being twisted, and the forward path cutting portion 33A and the backward path cutting portion 33B are the same so as to act simultaneously on the same workpiece. It is arranged in a plane.

  The forward path cutting part 33A is for cutting the workpiece W between the tip vice apparatus 5A and the intermediate vice apparatus 5B, and the return path cutting part 33B is the intermediate vise apparatus 5B and the material vice apparatus 5C. The workpiece W is cut in the meantime. Therefore, as described above, when the workpiece W is simultaneously cut by the forward path cutting portion 33A and the backward path cutting portion 33B of the band saw blade 33, the workpiece W is sandwiched and fixed by the tip vise device 5A; and It is divided into three at the same time, an intermediate part sandwiched and fixed by the intermediate vice apparatus 5B and a material sandwiched and fixed by the material vice apparatus 5C.

  At this time, two equal-sized cut pieces can be obtained simultaneously from the same workpiece W by setting the length of the tip portion and the length of the intermediate portion equal. Further, when the length of the tip portion is different from the length of the intermediate portion, cut pieces having different lengths can be obtained at the same time. Therefore, the cutting efficiency can be improved as compared with the case where cutting pieces are cut and separated from each workpiece W.

  The cutting length on the tip side is set by adjusting the position of a stopper (not shown) for contacting and positioning the tip (front end) of the workpiece W in the front-rear direction. In addition, since the structure which adjusts the position of the said stopper and a stopper to the front-back direction is already known well, detailed description about a stopper etc. is abbreviate | omitted.

  The setting of the cutting length on the intermediate side is performed by adjusting the distance between the forward cutting portion 33A and the backward cutting portion 33B in the band saw blade 33 in the front-rear direction. Accordingly, the moving frame 19 is provided with a cutting interval adjusting means 39 whose position can be adjusted in a direction in which the return path cutting portion 33B approaches and separates from the outward path cutting portion 33A.

  More specifically, the moving frame 19 is provided with a guide portion 41 (see FIG. 1) in the front-rear direction, that is, in the interval direction between the forward path cutting portion 33A and the backward path cutting portion 33B. An adjustment slider 45 is rotatably supported and supported by the idler wheel 43R on the drive wheel 25 side and the idler wheel 43L on the driven wheel 31 side so as to be spaced apart from each other in the left-right direction. The left and right idler wheels 43L and 43R are in contact with the portion of the return path cutting portion 33B inside or outside the endless band saw blade 33.

  Accordingly, by adjusting the movement of the adjustment slider 45 in the front-rear direction, the distance between the forward cutting portion 33A and the backward cutting portion 33B in the band saw blade 33 can be adjusted. That is, as shown in FIG. 2, when the idler wheels 43L and 43R are in contact with the outside of the return path cutting portion 33B, the adjustment slider 45 is moved and adjusted forward (downward in FIG. 2). Thus, the interval dimension between the forward path cutting portion 33A and the backward path cutting portion 33B can be adjusted in the direction of decreasing. On the other hand, when the idler wheels 43L and 43R are in contact with the inside of the return path cutting portion 33B, the forward path cutting portion is adjusted by moving the adjustment slider 45 in the backward direction (upward in FIG. 2). The distance between 33A and the return path cutting portion 33B can be adjusted in the direction of increasing.

  In addition, it is good also as a structure which pinches | interposes and guides the return path cutting part 33B in the band saw blade 33 by an inner side and an outer side idler wheel (roller). As already understood, by adjusting the movement of the adjusting slider 45 along the guide member 41, the distance between the forward cutting portion 33A and the backward cutting portion 33B in the band saw blade 33 can be adjusted to a desired size. It can be done.

  By the way, when the fluid pressure cylinder 37 as the tension applying means is operated and the driven wheel 31 is moved in the direction approaching the driving wheel 25, the band saw blade 33 is loosened, and conversely, the driven wheel 31 is moved from the driving wheel 25. When moving in the direction of separating, tension is applied to the band saw blade 33. Therefore, the band saw blade 33 is always applied with an appropriate tension even when it is loosened by moving the adjustment slider 45 back and forth by operating in relation to the movement adjustment of the driven wheel 31. The wheel 25 and the driven wheel 31 are held without being detached.

  More specifically, the cutting interval adjusting means 39 is provided with a biasing means 47 (see FIG. 3) for always pressing and biasing the idler wheels 43L and 43R to the return cutting part 33B of the band saw 33. . The urging means 47 is composed of an elastic member such as a spring or a fluid pressure cylinder connected to an accumulator.

  Therefore, when the solenoid valve SV shown in FIG. 3 is switched and the high-pressure working fluid from the pressure source P is supplied to the rod-side pressure chamber 37R of the fluid pressure cylinder 37, the driven wheel 31 is moved away from the drive wheel 25. The Therefore, the return path cutting portion 33B of the band saw blade 33 is gradually moved in a direction away from the outward path cutting portion 33A against the urging force of the urging means 47, and the forward path cutting portion 33A and the return path cutting portion 33B are separated from each other. The distance dimension is adjusted to be large.

  Then, by switching the solenoid valve SV to the state shown in FIG. 3 and maintaining the pressure in the rod side pressure chamber 37R at the pressure adjusted by the pressure reducing valve (balancing valve) RV with a relief function, the forward path cutting portion The distance between 33A and the return path cutting portion 33B can be maintained at an adjusted distance.

  When the pressure in the rod side pressure chamber 37R is adjusted to a lower pressure by adjusting the pressure reducing valve RV with the relief function, the action of the biasing means 47 causes the return path cutting portion 33B to approach the outward path cutting portion 33A. Will be moved. At this time, the working fluid is sucked from the tank T into the piston-side pressure chamber 37 </ b> P of the fluid pressure cylinder 37. And after adjusting the space | interval of the said return cutting part 33B and the outward cutting part 33A to a desired space | interval dimension, adjusting the pressure reducing valve RV with a relief function, and adjusting the pressure in the said rod side pressure chamber 37R. Thus, the distance between the forward path cutting part 33A and the backward path cutting part 33B can be maintained at a desired distance dimension.

  In the configuration as described above, the cutting end is adjusted by bringing the tip of the workpiece W into contact with the stopper, and the workpiece W is clamped and fixed by the vice devices 5A, 5B, and 5C. And after adjusting the space | interval dimension of the forward path cutting part 33A and the return path cutting part 33B in the band saw blade 33, and setting the cutting dimension of an intermediate part, it drives by rotating synchronously the 1st, 2nd motor 23A, 23B. The wheel 25 and the driven wheel 31 are rotated, and the band saw blade 33 is rotated. Thereafter, when the reciprocating device 21 is operated to move the moving frame 19 in the direction approaching the workpiece W, the workpiece W is simultaneously cut by the forward cutting portion 33A and the backward cutting portion 33B of the band saw blade 33. Become.

  At this time, since the drive wheel 25 and the driven wheel 31 are driven and rotated by the first and second motors 23A and 23B, respectively, the load due to the cutting resistance in the forward path cutting part 33A and the backward path cutting part 33B is the first and first motors. The two motors 23A and 23B are respectively divided. Therefore, the first and second motors 23A and 23B can be reduced in size.

  As can be understood from the above description, the two workpieces W can be cut simultaneously from the long workpiece W by the forward cutting portion 33A and the backward cutting portion 33B of the endless band saw blade 33. Since two pieces (products) are obtained simultaneously, the cutting efficiency can be improved. Since the cut pieces that have been cut and separated are arranged in a line in the longitudinal direction of the workpiece W, when the workpiece W is fed, the cut pieces can be fed forward, and the cut pieces can be easily carried out. To get. Further, since the band saw blade 33 cuts the workpiece without being twisted, the life of the band saw blade 33 can be improved.

  The present invention is not limited to the above-described embodiments, and can be implemented with other configurations by making appropriate changes. That is, in the above description, the case of a horizontal band saw machine that cuts the workpiece W from above to below has been described. However, the band saw machine includes a vertical band saw machine that cuts the workpiece W in the horizontal direction, and can be easily implemented in a vertical band saw machine.

  Further, the idler wheel can be configured by arranging a plurality of small-diameter rollers in an arc shape. Further, the configuration in which the adjustment slider 45 is moved to adjust the distance between the forward cutting portion 33A and the backward cutting portion 33B in the band saw blade 33 is not limited to the biasing means 47 described above, and is rotated by, for example, a motor. It is also possible to reciprocate the adjustment slider 45 using a screw mechanism.

  Furthermore, the driving wheel 25 and the driven wheel 31 are provided with a plurality of front and rear wheels that can be adjusted in the front-rear direction, that is, the driving wheel 25 and the driven wheel 31 are each constituted by a pair of front and rear wheels, It is also possible to adjust the distance between the forward path cutting portion 33A and the backward path cutting portion 33B. Even in this case, the operation of adjusting the tension of the band saw blade by adjusting the distance between the left and right drive wheels and the driven wheel and the operation of adjusting the distance between the forward path cutting part 33A and the backward path cutting part 33B are related to each other. Is desirable.

1 Band saw 3 Base frame (support frame)
5 Vise Device 5A Tip Vise Device 5B Intermediate Vice Device 5C Material Vice Device 11L, 11R Side Frame 13 Upper Frame 19 Moving Frame 21 Reciprocating Device (Hydraulic Cylinder)
25 driving wheel 31 driven wheel 33 band saw blade 33A forward cutting part 33B backward cutting part 37 fluid pressure cylinder (tension applying means)
39 Cutting section interval adjusting means 43L, 43R idler wheel 45 adjusting slider 47 biasing means

Claims (1)

A band saw machine having an endless band saw blade wound around a drive wheel and a driven wheel that are separated from each other in the left and right or up and down directions, and above or on the side of a support base that supports a long workpiece. to, to the mobile frame with movably direction toward and away from the workpiece, Rutotomoni comprises freely rotating the driving wheel and the driven wheel, first for individually rotated the drive wheel and a driven wheel, the 2, the forward cutting portion and the backward cutting portion of the band saw blade wound around the drive wheel and the driven wheel are directed toward the workpiece direction, and the forward cutting portion and the backward cutting portion are the same workpiece. intermediate vice Thea disposed in the same plane is, and the distal end side vice apparatus the distal end side to the sandwiching of the workpiece, the intermediate portion of the workpiece clamping fixing which act simultaneously on Band saw, characterized in that it comprises a location and a material vise assembly for holding the material side of the workpiece.

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