JP4464698B2 - Horizontal band saw machine - Google Patents

Description

  The present invention relates to a horizontal band saw. More specifically, the present invention relates to a horizontal band saw machine provided with a vibration suppressing member that can be pressed and contacted to the back of an annular band saw blade.

  In a horizontal band saw machine using a thin annular band saw blade as a cutting tool, the number of teeth of the band saw blade involved in cutting is small at the start of cutting, and the cutting groove is still formed stably. The band saw blade is vibrated due to the absence of the blade, that is, the saw blade does not bite the workpiece.

In order to suppress this vibration, a saw blade vibration-proof member that presses the back portion of the band saw blade toward the blade tip side is provided on the drive-side or driven-side saw blade guide member (for example, Patent Document 1).
Japanese Utility Model Publication No. 6-31917

  Since the above-mentioned saw blade vibration-proof member is provided on the drive-side or driven-side saw blade guide member at a position away from the cutting region, the vibration damping action continues even after the back of the band saw blade is immersed in the cutting material. Although there is a merit, there is a problem that the vibration damping effect is small because there is no saw blade vibration isolating member in the cutting region where the vibration amplitude is the largest.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a horizontal band saw capable of effectively suppressing the vibration of the band saw blade that occurs at the start of cutting in the cutting region. It is.

As a means for solving the above-mentioned problem, the horizontal band saw machine according to claim 1 is a horizontal type in which an annular band saw blade is wound around a drive wheel and a driven wheel rotatably supported by a vertically movable saw blade housing. In the band saw machine, a carriage bar extending horizontally in a direction parallel to the annular band saw blade is provided in a space above the cutting region of the annular band saw blade so as to be movable up and down, and is provided at a locking portion at one end of the carriage bar. A carriage bar holding portion that engages and holds the carriage bar is provided in the saw blade housing, and a contact plate that can contact an upper portion of the material to be cut for detecting the lowered position of the saw blade housing is provided on the carriage bar. together, which the subject matter to be against the abutment plate provided with a predetermined distance movable vibration suppression member vertically freely pressing contact with the saw blade back in the cutting region of the annular band saw blade A.

The horizontal band saw machine according to claim 2 is the horizontal band saw machine according to claim 1, further comprising a pressing urging means for urging the vibration suppressing member downward against the contact plate. It is what.

According to the present invention, a plate-like vibration suppression member that is movable by a predetermined distance in the vertical direction with respect to the contact plate that detects the lowered position of the saw blade housing is provided, and the weight of the vibration suppression member and vibration suppression are provided. The cutting start in which the cutting groove is not yet formed in the workpiece W by applying the pressing force of the pressing biasing means for pressing and biasing the member downward to the back of the band saw blade until a predetermined time after the cutting starts. The vibration of the band saw blade that sometimes occurs can be suppressed.

  This reduces noise during cutting and improves the life of the band saw blade.

  Embodiments of the present invention will be described below with reference to the drawings.

  Referring to FIG. 1, a horizontal band saw 1 according to an embodiment of the present invention includes a box-shaped base frame 3, and a material W to be cut from the back side of the paper surface is formed on the upper surface of the base frame 3. To be cut into the horizontal band saw machine 1 (not shown), and a product receiving base 29 (see FIG. 3) to support a product cut by the horizontal band saw machine 1 is provided.

  A vise device 5 provided with a fixed vise jaw 5F and a movable vise jaw 5M, which can clamp and fix the workpiece W, is provided on the workpiece carrying table (not shown). Since the configuration of the vice apparatus 5 is a general configuration and is known, a detailed description of the vise apparatus 5 is omitted.

A pair of left and right guide posts 7L and 7R are erected on the base frame 3. The upper ends of the guide posts 7L and 7R are connected to improve the strength and maintain the parallelism of the guide posts 7L and 7R. It is integrally connected through the member 9. Cylindrical slide sleeves 11L and 11R are fitted to the left and right guide posts 7L and 7R so as to be movable up and down, and left and right wheel brackets 13L are respectively provided on the left and right outer portions of the left and right slide sleeves 11L and 11R. , 13R are fixed integrally by welding or the like.

  The left and right wheel brackets 13L and 13R are inclined so that the upper side is the rear side (the upper side is the back side in FIG. 1). The lower sides of the slide sleeves 11L and 11R and the lower sides of the left and right wheel brackets 13L and 13R are integrally connected to a beam member 14 that is long in the left-right direction. The beam member 14 and the left and right wheel brackets 13L and 13R constitute a saw blade housing that rotatably supports a drive wheel and a driven wheel, which will be described later, and are configured in a C-shape with an upper opening. The height dimension can be suppressed.

  As shown in FIG. 2, the wheel bracket 13R has a double structure including an upper bracket 13A and a lower bracket 13B, and a rotating shaft 15 supported at both ends by the upper and lower brackets 13A and 13B. A drive wheel 17 is rotatably supported between the upper and lower brackets 13A and 13B. The drive wheel 17 is rotationally driven by a motor (not shown) mounted on the wheel bracket 13R.

  A driven wheel 21 is rotatably supported on the left wheel bracket 13L via a rotating shaft 19, and an annular band saw blade 23 is wound around the driven wheel 21 and the drive wheel 17. Further, a tension applying means 25 for applying tension to the annular band saw blade 23 by moving the driven wheel 21 in a direction approaching and separating from the drive wheel 17 is mounted on the wheel bracket 13L.

  The tension applying means 25 applies tension to the band saw blade 23 by moving a support block (not shown) supporting the rotating shaft 19 in a direction approaching and separating from the drive wheel 17. Since this type of tension applying means 25 is well known, it will not be described in more detail.

  In order to move the saw blade housing up and down, for example, a vertical movement actuator 27 (see FIG. 2) such as a hydraulic cylinder is provided, and a piston rod 27P in the vertical movement actuator 27 is connected to a part of the base frame 3. The cylinder body is integrally connected to the slide sleeve 11R (details of the connection structure are not shown). The actuator that moves the saw blade housing up and down is not limited to a hydraulic cylinder, and a ball screw mechanism that is rotated by a motor may be employed.

  As shown in FIG. 2, the drive wheel 17 and the driven wheel 21 have a drive wheel 17 and an upper side of the driven wheel 21 behind the guide posts 7L and 7R when viewed from the lateral direction (in FIG. The drive wheel 17 and the driven wheel 21 are inclined forward and backward so that the lower side of the drive wheel 17 and the driven wheel 21 is located on the front side (left side in FIG. 2) of the guide posts 7L and 7R.

  In the side view, the intersection O between the axis S of the drive wheel 17 and the driven wheel 21 and the center line L in the width direction of the wheels 17 and 21 is the front-rear direction of the guide posts 7L and 7R in the side view. The position is substantially equal to the width or within the width.

  Accordingly, the linear upper traveling portion 23U of the annular band saw blade 23 wound around the drive wheel 17 and the driven wheel 21 is located on the rear side of the pair of guide posts 7L and 7R. The lower running portion 23L is located on the front side of the guide posts 7L and 7R. Then, in order to cut the workpiece W by the upper traveling portion 23U, there is a saw blade guide (not shown) for twisting so that the tooth tip of the saw tooth in the upper traveling portion 23U is directed in the vertical downward direction. The saw blade housing is provided. Further, the lower running portion 23L of the annular band saw blade 23 is positioned below the workpiece support surface of the vise device 5 even when the saw blade housing is raised to the highest level.

  Further, in order to bring the minute clearance between the guide posts 7L and 7R and the slide sleeves 11L and 11R in one direction, that is, on the upper side of the slide sleeves 11L and 11R, the guide posts 7L and 7R The clearance of the saw blade housing is such that the clearance on the rear side (right side in FIG. 2) and the clearance on the front side (left side in FIG. 2) of the guide posts 7L and 7R become zero on the lower side of the slide sleeves 11L and 11R. The center of gravity of the saw blade housing is provided on the front side (the inclined lower side).

  1 to 4, between the guide posts 7 </ b> L and 7 </ b> R in the horizontal band saw 1, a product support 29 (see FIG. 3) that supports the cut product extends to the back side of the paper surface. The left and right guide rails 33L, 33R fixed with bolts or the like on both side surfaces of the product receiving base 29 and the lower surface of the connecting member 9 are erected in parallel in the vertical direction.

  In the upper space of the upper traveling portion of the annular band saw blade 23, a carriage bar 31 is provided in parallel with the upper traveling portion of the annular band saw blade 23 and extending in the horizontal direction. The left end of the carriage bar 31 is provided with a pair of guide rollers 35 and 37 that support a rotation shaft in the horizontal direction, and the left guide rollers 35 and 37 are capable of rotating the left guide rail 33L. It is provided so as to be sandwiched.

  The right guide rail 33R is integrally formed with a guide rail 39 having a second guide surface 39G orthogonal to the first guide surface 33G of the right guide rail 33R.

  At the right end of the carriage bar 31, two pairs of right guide rollers 35 and 37 spaced in the vertical direction for engaging and holding the right guide rail 33R and two pairs separated in the vertical direction for engaging and holding the guide rail 39 are provided. Guide rollers 41 and 43 are provided.

  The right end of the carriage bar 31 is provided with a locking portion 47 that engages with the upper surface of the carriage bar holding portion 45 provided on the upper side of the right slide sleeve 11R. A position adjusting screw means 49 for finely adjusting the position of the carriage bar 31 is provided on the upper surface of the carriage bar holding portion 45 (see FIG. 3).

  In the above configuration, when the saw blade housing moves up and down, the carriage bar 31 supported by the carriage bar holding portion 45 also moves up and down following the vertical movement of the saw blade housing.

  As shown in FIG. 4, a bracket 31B that protrudes horizontally from the carriage bar 31 to the rear side of the carriage bar 31 (upper side in FIG. 4) is integrally provided on the right side of the carriage bar 31 described above.

Referring to FIGS. 2 and 4 to 6, the bracket 31 </ b> B has a plate-like contact plate 53 for detecting the descending position of the saw blade housing and decelerating from the rapid descending speed to the cutting descending speed. It is fixed with a plurality of bolts 55.

As shown in FIGS. 3 and 4, the right end portion of the plate-like contact plate 53 described above is positioned substantially coincident with the fixed vise jaw 5F of the vise device 5, and the left end portion has the maximum width of the material to be cut. It is extended to almost the center position.

  In order to detect the lowered position of the saw blade housing, the slide sleeve 11R fixed integrally with the saw blade housing includes a proximity switch or a limit switch for detecting the dog 57 provided on the carriage bar 31. A sensor 59 is provided.

In the above structure, when the saw blade housing is lowered toward the workpiece W at a rapid descent, the dog 57 and the sensor 59 provided on the carriage bar 31 is also moved downward together with the saw blade housing, said plate-shaped contact plate 53 When the abutment comes into contact with the workpiece W, the lowering of the abutment plate 53 stops and only the saw blade housing further descends.

  At this time, at a position where the sensor 59 is lowered by 1 to 2 mm with respect to the dog 57, it is controlled by a control device (not shown) so as to reduce the descending speed of the saw blade housing from the rapid descending speed to the cutting descending speed. Is provided.

5, as is best shown in FIG. 6, the in position before the abutment plate 53 (in FIG. 6 left) and above the upper run of the annular band saw blade 23, the abutment plate A plate-like vibration suppressing member 61 that is movable in the vertical direction by a predetermined distance with respect to 53 is provided. A contact member 61T made of a highly wear-resistant material that slightly protrudes from the lower end is embedded in the lower end of the vibration suppressing member 61. It is desirable to use, for example, a cemented carbide as the material with high wear resistance.

  The plate-like vibration suppressing member 61 is provided with three guide slots 63 having the same length extending in the vertical direction for guiding the vibration suppressing member 61 in the vertical direction. Of these, the two long holes 63 are provided on the same center line extending in the vertical direction, and the remaining one long hole 63 is provided at a position spaced apart from the two long holes 63 in the horizontal direction.

On both surfaces of the three elongated holes 63, countersink holes 65 are provided as sliding surfaces for the washer 64 to be in sliding contact. A washer 64 is disposed on both surfaces of the three counterbore holes 65, a cylindrical spacer 67 is provided through the washer 64 and the elongated hole 63, and a bolt 69 through which the spacer 67 is inserted is connected to the contact plate 53 side. The vibration suppression member 61 is fastened and fixed so as to be movable in the vertical direction with respect to the contact plate 53 by tightening the washers 64 on both sides with a nut 73 via a disc spring 71. It is.

  In addition, by selecting the disc spring 71 having an appropriate strength, the sliding resistance can be set appropriately, and the moving distance in the vertical direction is restricted to an appropriate distance by the length of the long hole 63. Can do.

  The vibration suppression member 61 is provided with a bracket 75 that is integrally fixed to the vibration suppression member 61. The vibration suppression member 61 is pressed and urged downward from the carriage bar 31 to the bracket 75. A gas spring 77 acting as follows is attached.

  The upper end 77U of the gas spring 77 is fixed to the bracket 75 in a state in which the upper end 77U is always in contact with the carriage bar 31, and the vibration suppressing member 61 is constantly pressed and urged downward with respect to the carriage bar 31. is there. An ordinary spring can be used in place of the gas spring 77 for the above-mentioned vibration-proof damper.

In the above configuration, after the saw blade housing descends toward the workpiece W at a rapid speed and the contact plate 53 abuts on the workpiece W, the descending speed is reduced from the rapid descending speed to the cutting descending speed. Further, the saw blade housing is further lowered, and the band saw blade 23 comes into contact with the workpiece W to start cutting. At this time, the vibration suppressing member 61 is moved to the predetermined distance from which the vibration suppressing member 61 can move. Only during the period, the weight of the vibration suppressing member 61 and the pressing force of the vibration damping damper are applied to the back of the band saw blade, so that the band saw generated immediately after the start of the cutting where the cutting groove is not formed in the workpiece W. The vibration of the blade can be suppressed.

  Note that the vibration suppression effect is effective even with the weight of the vibration suppression member 61 alone. Further, the stroke amount of the gas spring 77 as the above-mentioned vibration damping damper is set to be longer than the stroke amount of the vibration suppressing member 61.

It is a conceptual and schematic front explanatory drawing of the horizontal type band saw machine concerning an embodiment of the invention. It is a conceptual and schematic front explanatory drawing of the right view of FIG. FIG. 2 is an enlarged explanatory view of a main part of the present invention in FIG. 1. FIG. 4 is an enlarged explanatory view of a main part of the present invention when FIG. Expansive explanatory drawing of the PP cross section in FIG. Expansion explanatory drawing of the TT cross section in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Horizontal type band saw machine 3 Base frame 5F Fixed vise jaw 5M Movable vice jaw 7L, 7R Guide post 9 Connecting member 11L, 11R Slide sleeve 13L, 13R Wheel bracket 13A Upper bracket 13B Lower bracket 14 Beam member 15 Rotating shaft 17 Drive wheel 19 Rotating shaft 19 21 Follower Wheel 23 Ring Band Saw Blade 23U Upper Traveling Section 23L Lower Traveling Section 25 Tension Applying Means 27 Vertical Moving Actuator 27P Piston Rod 29 Product Base 31 Carriage Bar 33L, 33R Guide Rail 35, 37 Guide Roller 39 Guide Rail 41, 43 Guide rollers 45 a carriage bar holding portion 47 engaging portion 49 position adjusting screw means 53 contact plate 55 bolt 57 dog 59 sensor 61 vibration suppressing member 63 elongated guide 64 washer 65 spot facing hole 67 spacer 69 bolt 71 disc spring 73 nut 75 bracket 77 gas spring L centerline O intersection S axis W workpiece

Claims (2)

In a horizontal band saw machine having a structure in which an annular band saw blade is wound around a drive wheel and a driven wheel that are rotatably supported by a vertically movable saw blade housing, the annular band saw blade is disposed above a cutting region of the annular band saw blade. A carriage bar extending horizontally in a direction parallel to the carriage bar is provided so as to be movable up and down, and the carriage bar holding part for holding the carriage bar by engaging with a locking part at one side end of the carriage bar is provided in the saw blade housing. A contact plate that can contact the upper part of the material to be cut for detecting the lowered position of the saw blade housing on the carriage bar, and vibration suppression that can move a certain distance in the vertical direction with respect to the contact plate A horizontal band saw machine characterized in that a member is provided so as to be press-contactable to a back part of a band saw blade in a cutting region of the annular band saw blade . 2. The horizontal band saw according to claim 1, further comprising pressing urging means for urging the vibration suppressing member downward with respect to the contact plate .

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