JP3640730B2 - Band saw machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a band saw machine that performs a cutting process on a workpiece, and more particularly, to a brush that removes chips adhering to a cutting edge of a band saw blade.
[0002]
[Prior art]
Hereinafter, a conventional band saw will be briefly described.
[0003]
A work table for supporting a work is provided on the base, and a saw blade housing is provided on the base so as to be movable in the vertical direction approaching and moving away from the work table. A pair of saw blade wheels for rotating an endless band saw blade is rotatably provided on both the left and right sides of the saw blade housing, and a portion having a cutting action is provided between the pair of saw blade wheels in the saw blade housing. A pair of a fixed saw blade guide and a movable saw blade guide are provided to support the band saw blade so as to be movable in the traveling direction under the state that the blade tip is twisted so as to be oriented substantially perpendicular to the workpiece. Here, in order to adjust the length of the portion that performs the above cutting action in accordance with the cutting width of the workpiece, the movable saw blade guide is positioned in the left-right direction (longitudinal direction of the saw blade housing) that approaches and separates from the fixed saw blade guide. It is configured to be adjustable.
[0004]
In order to remove chips adhering to the blade edge of the band saw blade, a brush support member is provided in the saw blade housing so as to be movable in the front-rear direction approaching the band saw blade, and the brush can be rotated on the brush support member. It is provided. Here, the brush is configured to be able to come into contact with the edge of the portion located between the fixed saw blade guide and the appropriate saw blade wheel (saw blade wheel close to the fixed saw blade guide) in the band saw blade. In order to adjust the amount of overlap of the band saw blade with respect to the cutting edge of the band saw blade , in other words, to adjust the amount of biting of the band saw blade with respect to the brush , the saw blade housing has a rear brush that contacts the surface of the brush and approaches the band saw blade. A stopper member for restricting the position is fixedly provided.
[0005]
Accordingly, the movable saw blade guide is moved in the longitudinal direction of the saw blade housing to adjust the length of the portion that performs the cutting action in accordance with the cutting width of the workpiece. Next, the band saw blade is caused to travel by rotating the pair of saw blade wheels while rotating the brush. Then, by moving the saw blade housing in the downward direction approaching the work table, the work supported by the work table is cut. Here, the movement of the brush in the backward direction approaching the band saw blade is restricted by contact with the stopper member, and the brush is rotated under an appropriate overlap amount (band saw blade biting amount). It is possible to remove the chips adhering to the blade edge.
[0006]
[Problems to be solved by the invention]
By the way, the conventional band saw machine is provided with a fixed saw blade guide and a movable saw blade guide, and the brush is configured to be able to come into contact with the edge of the band saw blade located between the fixed saw blade guide and the appropriate saw blade wheel. the twist angle of the contact portion between the brush in the band saw blade (referred brush contact portion of the band saw blade) is unchanged. Therefore, by restricting the backward movement of the brush by the stopper member, the overlap amount of the brush (the amount of biting of the band saw blade) can be maintained at an appropriate overlap amount (the amount of biting of the band saw blade) .
[0007]
However, the brush is configured to be able to come into contact with the edge of the part located between the movable saw blade guide (one saw blade guide) in the band saw blade and the appropriate saw blade wheel (saw blade wheel adjacent to the movable saw blade guide). In a band saw machine that is configured to be able to move in the direction in which the band saw machine or any of the saw blade guides can move toward and away from the other saw blade guide, the twist angle of the brush contact portion of the band saw blade changes with the movement of the saw blade guide However, even if the backward movement of the brush is restricted by the stopper member, the overlap amount of the brush cannot be maintained at an appropriate overlap amount (the amount of biting of the band saw blade) . That is, when one of the saw blade guides moves away from the other saw blade guide, the twist angle of the brush contact portion of the band saw blade increases, and the amount of biting of the band saw blade (brush overlap amount) increases. Increase. Moreover, when one of the saw blade guides moves in a direction approaching the other saw blade guide, the twist angle of the brush contact portion of the band saw blade is reduced, and the amount of biting of the band saw blade (brush overlap amount) is reduced. decrease. Therefore, if the amount of overlap of the brush (the amount of biting of the band saw blade) is considerably smaller than the appropriate amount of overlap (the amount of biting of the band saw blade) , it is not possible to sufficiently remove the chips with the brush. If the amount of overlap of the brush (the amount of biting of the band saw blade) is much larger than the appropriate amount of overlap (the amount of biting of the band saw blade) , the wear of the brush is severe and uneconomical, and the blade edge of the band saw blade is damaged. There's a problem.
[0008]
[Means for Solving the Problems]
In order to solve the conventional problems as described above, in the present invention, a work table that supports a work is provided, and a saw blade housing that can move in a direction approaching and moving away from the work table is provided. A pair of saw blade wheels for rotating an endless band saw blade are rotatably provided, and the saw blade housing is twisted so that the cutting edge of the portion performing the cutting action is oriented substantially perpendicular to the workpiece. A pair of saw blade guides are provided to support the band saw blade movably in the traveling direction below, and at least one saw blade guide approaches and separates from the other saw blade guide in order to adjust the length of the cutting action portion. Configured to be position adjustable in the longitudinal direction of the saw blade housing,
A brush support member is provided in the saw blade housing so as to be movable toward and away from the band saw blade, and the brush support member has a portion of the band saw blade located between the one saw blade guide and the one saw blade wheel. rotatable a possible contact brushes the cutting edge, movably provided stopper path member for restricting the movement of direction of the brush approaching the band saw blade by contacting the surface of the brush to the saw blade housing in the vertical direction, A biasing member that biases the brush support member so that the surface of the brush and the stopper member are in contact with each other; and a fixing device that fixes the brush support member to the saw blade housing in an immovable manner. The stopper member is configured to be vertically adjustable with respect to the saw blade housing in correspondence with the longitudinal position of the one saw blade guide. To.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
Referring to FIG. 7, a band saw machine 1 according to an embodiment of the present invention is configured on the basis of a box-shaped base 3, and a work table 5 for supporting a work W is provided on the base 3. It is. The work table 5 includes a vise device 7 that presses and fixes the work W from the left-right direction (left-right direction in FIG. 7). Further, the base 3 is provided with a saw blade housing 11 having an endless band saw blade 9, and the saw blade housing 11 is moved up and down with respect to the work table 5 by the operation of the swing cylinder 13. It swings (an example of movement) in the vertical direction in FIG. A pair of saw blade wheels 15, 17 are rotatably provided on the left and right sides of the saw blade housing 11, and the pair of saw blade wheels 15, 17 are rotated by driving of a wheel drive motor (not shown). is there.
[0011]
Between the pair of saw blade wheels 15 and 17 in the saw blade housing 11, a pair of left and right saw blade guides 19 and 21 are provided, and the pair of saw blade guides 19 and 21 has a cutting edge at a portion that performs a cutting action. The band saw blade 9 is supported so as to be movable in the traveling direction under a state of being twisted so as to be oriented substantially perpendicular to the workpiece W. In order to adjust the length of the portion having the cutting action in accordance with the cutting width of the workpiece W, the pair of saw blade guides 19 and 21 are moved toward and away from each other in synchronization with the operation of a guide operating device (not shown). It moves in the (longitudinal direction of the saw blade housing 11). The saw blade guides 19 and 21 may be configured to move independently in the left-right direction by the operation of an independent guide operating device (not shown).
[0012]
1 to 4, in order to remove chips adhering to the cutting edge of the band saw blade 9, a brush 23 capable of contacting the cutting edge of the band saw blade 9 is provided at an appropriate position on the left side of the saw blade housing 11. A chip removing device 25 is provided. Hereinafter, the chip removing device 25 will be described in detail. In FIG. 2, the band saw blade 9 is omitted for convenience of explanation .
[0013]
The left part of the support frame part 27 which is a part of the saw blade housing 11 (the back part toward the paper surface in FIG. 1 and the left part in FIGS. 2 to 4) is positioned forward (left side in FIG. 2 and FIG. 3 is provided with a support arm 29 that protrudes in the front direction toward the plane of the drawing and downward in FIG. 4. This support arm 29 is connected to the upper end of a brush support member 31 having an inverted U-shaped cross section. is there. The brush support member 31 is configured to be swingable in the front-rear direction approaching and separating from the band saw blade 9, and is fixed to the support arm 29 and the saw blade housing 11 so as not to move by the operation of the fixing device 33. It is something that can be done.
[0014]
That is, a hinge pin 35 is fixed to the support arm 29, and the right side portion 31a of the brush support member 31 is rotatably supported by the hinge pin 35. A cylinder block 37 is fixed between the support arm 29 and the left side 31b of the brush support member 31, and a piston 39 is provided in the cylinder block 37 so as to be movable in the left-right direction. The piston 39 is provided with a piston rod 39R coaxial with the hinge pin 35, and a pressing member 41 capable of pressing the left side 31b of the brush support member 31 from the left is provided at the tip of the piston rod 39R. . Therefore, by moving the piston 39 to the left and releasing the pressing state by the pressing member 41, the brush support member 31 can swing back and forth around the hinge pin 35. The brush support member 31 can be fixed to the support arm 29 and the saw blade housing 11 such that the brush support member 31 cannot swing by being moved rightward and pressing the right side portion 31b of the brush support member 31 from the right direction by the pressing member 41. .
[0015]
The brush 23 is rotatably provided at the lower end portion of the brush support member 31, and a brush rotation motor 45 is provided at an appropriate position of the brush support member 31 for rotating the brush 23. A rotary motor 45 is interlocked and connected to the rotating shaft of the brush 23 via a gear mechanism 47.
[0016]
Overlap amount of the brush 23 with respect to the cutting edge of the band saw blade 9, in other words, to adjust the bite amount of the band saw blade 9 with respect to the brush 23, at a position close to the left side of the saw blade wheel 15 in the support frame portion 27, the brush A stopper member 49 is provided for restricting the swinging of the brush 23 in the backward direction approaching the band saw blade 9 by contacting the surface of the belt 23. In addition, the amount of the band saw blade 9 biting into the brush 23 indicated by the solid line in FIG. 1 is the amount of overlap of the brush 23 with respect to the cutting edge of the band saw blade 9 (the amount of biting of the band saw blade 9). A spring 51 is provided between the brush support member 31 and the support frame portion 27 so that the brush support member 31 can be urged rearward so that the surface of the brush 23 and the stopper member 49 come into contact with each other.
[0017]
The stopper member 49 is configured to be swingable in the vertical direction in conjunction with the movement of the saw blade guide 19 in the left-right direction by the operation of the interlock mechanism 53. Here, the interlocking mechanism 53 includes a slide plate 55, a connecting link 57, an eccentric shaft 61 provided with an eccentric portion 59, sprockets 63 and 65, a chain 67, and a connecting bracket 69. .
[0018]
That is, a slide plate 55 is provided on the support frame portion 27 of the saw blade housing 11 so as to be movable in the vertical direction via the guide member 56. The slide plate 55 has a lower end portion of a connecting link 57 extending in the vertical direction. Is pivotally connected. As shown in FIG. 5, a rear end portion of an eccentric shaft 61 having an eccentric portion 59 eccentric in the vertical direction is rotatably supported above the slide plate 55 in the support frame portion 27 . Is pivotally connected to the eccentric portion 59 (see FIG. 5). A sprocket 63 is integrally provided at the front end portion of the eccentric shaft 61, and a sprocket 65 is rotatably provided on the right side of the sprocket 63 in the support frame portion 27. A chain 67 is wound around the sprockets 63 and 65, and a part of the chain 67 and a part of the saw blade guide 19 are connected by a connecting bracket 69.
[0019]
The support frame portion 27 is provided with a U-shaped support bracket 71, and a rotation shaft 73 is rotatably provided on the support bracket 71. The stopper member 49 is integrally connected to the left end portion of the rotating shaft 73, and the base portion of the lever 75 is integrally provided at the right end portion of the rotating shaft 73. In order to rotate the rotating shaft 73, the slide plate 55 is provided with a fluid pressure cylinder 79 including a piston rod 77 that can move in the vertical direction. It is pivotally connected by turning holes and pins.
[0020]
Therefore, after the piston 39 is moved leftward to release the pressing state by the pressing member 41, the sprockets 63 and 65 are rotated via the chain 67 by the horizontal movement of the saw blade guide 19, whereby the eccentric shaft 61 is rotated integrally with the sprocket 63, and the connecting link 67, the slide plate 55, and the fluid pressure cylinder 77 are moved in the vertical direction by the eccentric action of the eccentric portion 59 of the eccentric shaft 61 . Accordingly, the stopper member 49 can be rocked integrally with the lever 75 via the rotary shaft 73 in the vertical direction in conjunction with the rocking of the saw blade guide 19 in the left-right direction . Also, swing by the stopper member 49 swings in the vertical direction, the brush 23 is to being in contact with the stopper member 49 by the biasing force of the spring 51, before and after approaching away the band saw blade 9 about the human Njipin 35 direction At the same time, the brush support member 31 also swings in the front-rear direction integrally with the brush 23 around the hinge pin 35 .
[0021]
Then, by moving the piston 39 to the right and pressing the right side portion 31b of the brush support member 31 from the right direction by the pressing member 41, the brush support member 31 cannot be swung to the support arm 29 and the saw blade housing 11. Fix it. Accordingly, the stopper member 49 can be adjusted in the vertical direction (oscillation position adjustment) with respect to the saw blade housing 25 in accordance with the position of the saw blade guide 19 in the left-right direction. The overlap amount of the brush 23 (the amount of biting of the band saw blade 9) can be adjusted .
[0022]
After the stopper member 49 is vertically adjusted with respect to the saw blade housing 25, the stopper member 49 is swung upward integrally with the lever 75 via the rotary shaft 73 by the operation of the fluid pressure cylinder 79. As a result, the contact between the stopper member 49 and the brush 23 is released .
[0023]
Further, although the stopper mechanism 49 is configured to swing up and down in conjunction with the movement of the saw blade guide 19 in the left-right direction by the operation of the interlocking mechanism 53, it may be configured as follows.
[0024]
That is, referring to FIG. 6, the position of the saw blade guide 19 in the left-right direction (longitudinal direction of the saw blade housing 11) is detected by the guide position detector 81, and the stopper member corresponding to the detected value is detected by the control device 83. The servo motor 85 that swings 49 in the vertical direction is controlled. The horizontal position of the saw blade guide 19 corresponds to the twist angle of the contact portion of the band saw blade 9 with the brush 23 (referred to as the brush contact portion of the band saw blade 9). As a result, the twist angle of the brush contact portion of the band saw blade 9 is detected. Here, as the guide position detector 81, a potentiometer shown in Japanese Utility Model Laid-Open No. 61-159124 or a proximity switch arranged at an appropriate interval in the longitudinal direction in the saw blade housing 11 is used. A member 87 is interlocked and a nut member 89 screwed to the screw member 87 is connected to the stopper member 49 via the rotary shaft 91 and the lever 93. The rotating shaft 91 and the lever 93 have substantially the same configuration as the rotating shaft 73 and the lever 77 in the interlocking mechanism 53.
[0025]
The operation of the embodiment of the present invention will be described.
[0026]
The pair of saw blade guides 19 and 21 are moved in the left and right direction (longitudinal direction of the saw blade housing 11) to approach and separate by the operation of the guide actuating device, and the cutting action on the band saw blade 9 corresponding to the cutting width of the workpiece W is performed. Adjust the length of the playing part. Here, when the left-side saw blade guide 19 moves in the longitudinal direction, the twist angle of the portion of the band saw blade 9 that contacts the brush 23 changes.
[0027]
Further, the interlock mechanism 53 operates to move the stopper member 49 in the vertical direction in conjunction with the movement of the left saw blade guide 19 in the longitudinal direction, and the brush support member 31 is swung to the support arm 29 by the fixing device 33. Fix impossible. Therefore, even if the twist angle of the brush contact portion of the band saw blade 9 changes, the overlap amount of the brush 23 with respect to the cutting edge of the band saw blade 9 (the amount of biting of the band saw blade 9) is determined by the twist angle of the brush contact portion of the band saw blade 9 . Adjustment can be made so that an appropriate overlap amount corresponding to the change (the amount of biting of the band saw blade 9) is obtained. Here, when using the guide position detector 81, the control device 83, the servo motor 85, etc. as shown in FIG. By detecting the position of the guide 19 in the longitudinal direction and controlling the servo motor 85 in response to the detected value by the control device 83, in other words, according to the change in the twist angle of the brush contact portion of the band saw blade 9. Then, the stopper member 49 is swung in the vertical direction to adjust the overlap amount of the brush 23 with respect to the cutting edge of the band saw blade 9 (the amount of biting of the band saw blade 9) .
[0028]
Then, the operation of the fluid pressure cylinder 79 causes the stopper member 49 to swing upward, thereby releasing the contact between the stopper member 49 and the brush 23. In the case where the stopper member 49 is swung in the vertical direction by driving the servo motor 85 as shown in FIG. 6, the stopper member 49 is swung in the upward direction by driving the servo motor 85. Then , the contact between the stopper member 49 and the brush 23 is released.
The band saw blade 9 is caused to travel by the rotation of the pair of saw blade wheels 15 and 17 while the brush 23 is rotated by driving the brush rotation motor 45. Then, the saw blade housing 11 is moved downward toward the work table 5 by the operation of the swing cylinder 13, thereby cutting the work W supported and fixed to the work table 5. Here, since the brush 23 is rotated under an appropriate overlap amount corresponding to the twist angle of the brush contact portion of the band saw blade 9 (the amount of biting of the band saw blade 9) , it adheres to the cutting edge of the band saw blade 9 Chips can be removed sufficiently. Further, since the contact between the stopper member 49 and the brush 23 is released, even when the brush 23 is rotated, no friction is generated between the stopper member 49 and the brush 23.
[0029]
As described above, according to the embodiment of the present invention, even if the twist angle of the brush contact portion of the band saw blade 9 changes due to the movement of the left saw blade guide 19 in the left-right direction (longitudinal direction of the saw blade housing 11). The brush 23 can be rotated under an appropriate overlap amount (amount of biting of the band saw blade 9) corresponding to a change in the twist angle of the brush contact portion of the band saw blade 9 . Therefore, the chips adhering to the cutting edge of the band saw blade 9 can be sufficiently removed, and the wear of the brush 23 and the damage to the cutting edge of the band saw blade 9 can be suppressed.
[0030]
Furthermore, since friction does not occur between the brush 23 and the stopper member 49 when the brush 23 is rotated, it is possible to further suppress the wear of the brush 23 from being increased, and when the brush 23 is rotated. The generated load can be reduced.
[0031]
【The invention's effect】
According to the invention of any one of claims 1 to 3 , even if the twist angle of the brush contact portion of the band saw blade changes due to the movement of one of the saw blade guides, the brush contact of the band saw blade The brush can be rotated under an appropriate overlap amount (band saw blade biting amount) corresponding to the change in the twist angle of the portion . Therefore, the chips adhering to the cutting edge of the band saw blade can be sufficiently removed, and the wear of the brush can be increased and damage to the cutting edge of the band saw blade can be suppressed.
[Brief description of the drawings]
FIG. 1 is a view taken along line II in FIG.
FIG. 2 is a front view of the chip removing device.
3 is a view taken along line III-III in FIG.
4 is a view taken along line IV-IV in FIG.
FIG. 5 is a view taken along the line VV in FIG. 3;
FIG. 6 is a schematic diagram showing another embodiment.
FIG. 7 is a front view of a band saw machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Band saw machine 9 Band saw blade 11 Saw blade housing 19, 21 Saw blade guide 23 Brush 25 Chip removal apparatus 27 Support frame 31 Brush support member 49 Stopper member 53 Interlocking mechanism

Claims (3)

A work table that supports the work is provided, a saw blade housing that can move toward and away from the work table is provided, and a pair of saw blade wheels that rotate an endless band saw blade are rotatably provided on the saw blade housing. Also, a pair of saw blade guides that support the band saw blade so as to be movable in the traveling direction in a state where the saw blade housing is twisted so that the cutting edge of the portion that performs the cutting action is oriented substantially perpendicular to the workpiece. In order to adjust the length of the cutting action portion, at least one of the saw blade guides can be adjusted in the longitudinal direction of the saw blade housing approaching and separating from the other saw blade guide,
A brush support member is provided in the saw blade housing so as to be movable toward and away from the band saw blade, and the brush support member has a portion of the band saw blade located between the one saw blade guide and the one saw blade wheel. A brush that can contact the blade tip is rotatably provided, and a stopper member that restricts the movement of the brush in a direction approaching the band saw blade by contacting the surface of the brush on the saw blade housing is provided to be movable in the vertical direction, An urging member for urging the brush support member so that the surface of the brush and the stopper member are in contact with each other; and a fixing device for immobilizing the brush support member with respect to the saw blade housing. The member is configured to be vertically adjustable with respect to the saw blade housing in correspondence with the longitudinal position of the one saw blade guide. Band saw that. The band saw machine according to claim 1, further comprising an interlocking mechanism that moves the stopper member in the vertical direction in conjunction with the longitudinal movement of the one saw blade guide. A detection value detected by the guide detector, provided with a guide position detector for detecting the longitudinal position of the one saw blade guide, and provided with a stopper operating device for moving the stopper member in the vertical direction on the brush. The band saw machine according to claim 1, further comprising a control device for controlling the stopper actuating device in response to the above.

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