JP2016005852A - Vibration suppression device for band saw blade in band saw machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration suppression device for a band saw blade in a band saw machine capable of exhibiting enough a vibration suppression function without any trouble in maintenance.SOLUTION: The band saw machine includes: a pair of rollers 61a, 61a disposed freely rotatable along a running direction of a band saw blade 100 at a position sandwiching a trunk part 101 of the band saw from both sides at least one of an inlet side and an outlet side with respect to a work piece of the band saw blade 100 at an interval throughout which a cutting machining to the work piece is performed; springs 58 giving the pair of rollers 61a, 61a energizing force in the direction of sandwiching the trunk part of the band saw blade; and vibration controlling gels 57 arranged in series to the springs at positions receiving a reaction force of the springs applied when the trunk part of the band saw blade is sandwiched between the pair of rollers 61a, 61a.

Description

  The present invention relates to a vibration suppressing device that suppresses vibration in the thickness direction of a band saw blade in a band saw machine.

  The band saw machine cuts a workpiece by moving an endless band saw blade in a cutting direction (direction of cutting into the workpiece) while circulating and running in a predetermined direction. When cutting the workpiece with this band saw machine, if vibration occurs in the blade thickness direction on the band saw blade, it will not be possible to perform high-precision cutting, but it will also generate noise and vibration, deteriorating the working environment. Let

  Therefore, in the conventional band saw machine, as countermeasures, the band saw blade speed is variably controlled, band saw blades with sawtooths of unequal pitch are adopted, the band saw blade is changed depending on the work material, and other cutting The conditions have been changed.

  However, these methods often cause a decrease in productivity. As another method, a structure is known in which the band saw blade is sandwiched between vibration isolating rollers to which a biasing force is applied to prevent the band saw blade from vibrating in the blade thickness direction (see, for example, Patent Document 1). ).

Japanese Patent Laid-Open No. 11-104914

  By the way, for example, when an anti-vibration roller having an outer periphery made of rubber or the like is used, a portion of the band saw blade that comes into contact with the body portion is worn out, so that maintenance is required frequently. In addition, when left in a state where wear has progressed, there is also a problem that the vibration suppressing function for the band saw blade is impaired.

  In view of the above circumstances, an object of the present invention is to provide a vibration suppression device for a band saw blade in a band saw machine that can sufficiently exhibit a vibration suppression function without troublesome maintenance.

  In order to solve the above-mentioned problem, the invention of claim 1 is directed to a band saw blade in a band saw machine that performs a cutting process on a workpiece by moving an endless band saw blade in a cutting direction while circulating in a fixed direction. In the vibration suppressing device, in the traveling direction of the band saw blade, at a position sandwiching the body of the band saw blade from both sides on at least one of the entry side and the exit side of the band saw blade with respect to the workpiece in the section in which the workpiece is cut. A pair of rollers rotatably disposed along the belt, biasing means for applying a biasing force in a direction to sandwich the body of the band saw blade to at least one of the pair of rollers, and a body of the band saw blade The biasing means and a viscoelastic member arranged in a predetermined row are provided at a position where the reaction force of the biasing means acting when sandwiched between the pair of rollers is received.

  According to a second aspect of the present invention, there is provided the band saw blade vibration suppressing device in the band saw machine according to the first aspect, wherein the roller is constituted by an outer ring of a rolling bearing, and the outer periphery of the outer ring is directly connected to the body of the band saw blade. It contacts the surface of the part.

  A third aspect of the present invention is the band saw blade vibration suppressing device in the band saw machine according to the first or second aspect, wherein the band saw blade is positioned so that swing ends are located on both sides in the blade thickness direction of the band saw blade. A pair of oscillating arms are supported by two fulcrums arranged symmetrically with respect to an extension line in the blade width direction of the blade so that the pair of swing arms are respectively in the thickness direction of the band saw blade around the fulcrum The pair of oscillating arms is rotatably mounted along the traveling direction of the band saw blade at each oscillating end of the pair of oscillating arms via a support shaft. A housing having the two fulcrums is provided outside, and the pair of rollers are moved to the inside to move the pair of rollers to a position sandwiching the body portion of the band saw blade. On the other hand, swing the pair of swing arms outward. An opening / closing mechanism for moving the pair of rollers to a position away from a position sandwiching the body portion of the band saw blade is provided, and the pair of rollers is disposed at a position facing the outer surface of each swing arm of the housing. The urging means for applying an urging force in a direction of sandwiching the body portion of the band saw blade to the pair of rollers is disposed by pressing each of the swing arms toward the surface of the body portion of the band saw blade. The viscoelastic member is disposed behind each of the urging means while being held by the housing.

  According to a fourth aspect of the present invention, there is provided the band saw blade vibration suppressing device according to the third aspect of the present invention, wherein the housing is provided with a storage chamber for the viscoelastic member, and the storage chamber is provided at the back of the storage chamber. And a lid that receives the reaction force from the viscoelastic member in a closed state is detachably attached.

  A fifth aspect of the present invention is the band saw blade vibration suppressing device in the band saw machine according to the third or fourth aspect, wherein each of the pair of swing arms has a tip of one arm portion as the swing end. The other arm portion is an operation arm portion, and the intersection of the one arm portion and the other arm portion is configured as a bell crank-shaped arm rotatably supported by the fulcrum, The operation arm portions extend inward from the respective fulcrums and wrap around each other, and on the extension line in the blade width direction of the band saw blade, the wrapping portions of both operation arm portions are in the blade width direction of the band saw blade. The opening / closing mechanism is provided that displaces the pair of swinging arms to the open side by pushing and moving along, and displaces the pair of swinging arms to the closing side by releasing the push movement. It is characterized by

  The invention of claim 6 is the band saw blade vibration suppressing device in the band saw machine according to claim 5, wherein the opening and closing mechanism is slidably disposed along the blade width direction of the band saw blade in the housing, A cylinder formed in the housing, having a pressing rod that pushes and moves the lap portions of the operation arm portions at the tip along the blade width direction of the band saw blade, and a piston connected to the base end of the pressing rod The piston is slidably accommodated therein, and fluid pressure is introduced into the working chamber of the cylinder so that the pressure rod is pushed and moved through the piston. And a return spring that is urged in the direction opposite to the pushing movement direction.

  A seventh aspect of the present invention is the band saw blade vibration suppressing device in the band saw machine according to any one of the first to sixth aspects, wherein the vibration of several tens Hz to 500 Hz can be damped as the viscoelastic member. An anti-vibration gel is used.

  The invention according to claim 8 is the vibration suppressing device for the band saw blade in the band saw machine according to any one of claims 1 to 7, wherein the position of sandwiching the body portion of the band saw blade between the pair of rollers is It is characterized in that it is set between an intermediate position of the blade width dimension of the band saw blade and the galette bottom on the blade edge side.

  A ninth aspect of the present invention is the band saw blade vibration suppressing device in the band saw machine according to any one of the first to eighth aspects, wherein the band saw blade is provided on an inlet side and an outlet side of the band saw blade with respect to the workpiece. A saw blade guide is provided for supporting the band saw blade so that it can run while directing the direction of the blade tip to the workpiece, and is arranged on the saw blade guide.

  According to the first aspect of the present invention, the band saw blade is vibrated in the blade thickness direction by the urging means provided separately from the roller sandwiching the band saw blade, and the viscoelastic member arranged in a predetermined row with the urging means. Vibration) can be absorbed. Therefore, it is not necessary to give a vibration absorbing action to the roller itself. In other words, it is not necessary for the roller to be a vibration isolating roller whose outer periphery is made of rubber having a vibration absorbing function, and the outer periphery of the roller can be made of metal or a material having wear resistance equal to or higher than that of metal. Can prevent wear. In addition, vibration is not absorbed by rubber as in the case of the vibration isolating roller, but vibration is absorbed by the biasing means and the viscoelastic member, so that the vibration suppressing effect of the band saw blade can be enhanced. Further, since the biasing means and the viscoelastic member are not in direct contact with the band saw blade, there is almost no wear and there is almost no troublesome maintenance. Therefore, the chatter vibration of the band saw blade can be sufficiently suppressed while maintaining productivity without maintenance, and the quality of the cut surface of the product can be maintained, and vibration and noise can be prevented.

  According to the invention of claim 2, since the outer ring of the rolling bearing is directly used as the roller, the configuration can be simplified.

  According to the invention of claim 3, by operating the opening / closing mechanism to swing the pair of swing arms inward, the body portion of the band saw blade can be sandwiched by the pair of rollers. In this state, the urging force in the direction in which the band saw blade is sandwiched by the urging means acts on the pair of rollers, and viscoelastic members are arranged in a predetermined row behind each urging means. The vibration in the blade thickness direction of the blade can be absorbed. Further, when not required, the pair of rollers can be easily separated from the position sandwiching the body portion of the band saw blade by operating the opening / closing mechanism and swinging the pair of swing arms outward. At that time, the opening / closing mechanism only needs to provide a force for opening the pair of swing arms outward against the force of the biasing means.

  According to the invention of claim 4, the viscoelastic member can be easily exchanged by opening and closing the lid.

  According to the invention of claim 5, the pair of swing arms is configured as a bell crank-shaped arm, and the swing arms are displaced to the open side by pushing and moving the wrapping portions of both operation arm portions with the opening / closing mechanism. Thus, the pair of swing arms can be opened / closed while being synchronized by one opening / closing mechanism. Therefore, it is possible to contribute to simplification of the configuration.

  According to the invention of claim 6, by introducing the fluid pressure into the working chamber of the fluid pressure cylinder mechanism, it is possible to push and move the pressing rod through the piston, thereby opening the pair of swing arms to the open side. The pair of rollers can be moved away from the position sandwiching the body portion of the band saw blade. Further, by releasing the fluid pressure in the working chamber, the pushing movement force applied to the pushing rod can be removed, so that the swing arm is displaced inward by the urging force of the urging means, and the band saw is moved by the pair of rollers. The body part of the blade can be sandwiched, and in this state, the vibration of the band saw blade in the blade thickness direction can be absorbed by the action of the biasing means and the viscoelastic member. At that time, since the pressing rod and the piston are urged in the direction opposite to the pushing movement direction by the restoring force, the force of the urging means is transmitted to the roller without being affected by the weight of the pressing rod and the piston as much as possible. be able to.

  According to the seventh aspect of the present invention, since the vibration-proof gel having high vibration damping performance with respect to a specific frequency is used as the viscoelastic member, chatter vibration in the blade thickness direction of the band saw blade can be effectively suppressed.

  According to invention of Claim 8, the chatter vibration of a band saw blade can be suppressed effectively.

  According to the ninth aspect of the invention, since the vibration suppressing device is arranged in the saw blade guide, the configuration is simplified.

It is a perspective view of the band saw machine equipped with the vibration suppression device of the embodiment of the present invention. It is a block diagram of the vibration suppression apparatus of the embodiment of the present invention, and is a cross-sectional view showing a state in which a pair of rollers is separated from the body of the band saw blade. It is a block diagram of the vibration suppressing device of the embodiment of the present invention, and is a cross-sectional view showing a state in which the body portion of the band saw blade is sandwiched between a pair of rollers. It is a model figure of the vibration system of a band saw blade.

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

  FIG. 1 is a perspective view of a band saw machine equipped with the vibration suppressing device of the embodiment.

  The band saw machine 1 is a horizontal band saw machine that performs cutting on a workpiece (not shown) by moving the endless band saw blade 100 in the direction indicated by arrow B while circulating the endless band saw blade 100 in the direction indicated by arrow A. And a base 3 that supports the workpiece, a cutting head 10 that reciprocates up and down along a guide post 5 erected on the base 3, and a vise mechanism 30 that clamps the workpiece.

  The cutting head 10 is provided with a pair of saw blade wheels 11 and 12 for winding and supporting an endless band saw blade 100 so as to be spaced apart from each other in the horizontal direction. One saw blade wheel is rotationally driven by a drive mechanism (not shown), and the other saw blade wheel is driven to rotate. Further, in order to apply tension to the band saw blade 100, the distance between the pair of saw blade wheels 11 and 12 can be adjusted.

  In the cutting head 10, a saw blade guide mechanism 20 is disposed between the pair of saw blade wheels 11 and 12. The saw blade guide mechanism 20 is configured so that the cutting edge 102 of the section (the lower part that moves linearly in the horizontal direction) that performs the cutting action of the band saw blade 100 is oriented substantially perpendicularly to the workpiece (to be directed vertically downward). ) A mechanism that supports the band saw blade 100 so that it can circulate in a twisted state, and includes a beam member 21 extending in the horizontal direction and a pair of saw blade guides 22 and 23 suspended from the beam member 21. One of the pair of saw blade guides 22 and 23 is fixed as a reference side, and the other saw blade guide 23 is movably provided on the beam member 21. Saw blade inserts 26 and 25 are provided at the lower ends of the saw blade guides 22 and 23 to guide the band saw blade 100 so that it can travel.

  In the above configuration, the band saw blade 100 is rotated by the rotation of the saw blade wheels 11 and 12, and the cutting head 10 is moved in the cutting direction to move the cutting head 10 in the cutting direction. The workpiece supported on the base 3 can be cut.

  Next, the vibration suppressing device will be described with reference to FIGS.

  As shown in FIG. 1, the vibration suppressing device 50 in the band saw machine 1 is configured such that the band saw blade 100 enters the workpiece with respect to the workpiece (upstream side of the workpiece in the traveling direction A of the band saw blade 100) and the outlet side (travel direction of the band saw blade 100). A side of the saw blade inserts 26, 25 (included in the saw blade guides 22, 23) facing the workpiece side of the saw blade inserts 26, 25 (downstream of the workpiece in A) is provided. In this case, the vibration suppression device 50 is arranged on both the entry side and the exit side of the band saw blade 100 with respect to the workpiece. However, the vibration suppression device 50 may be arranged only on either the entry side or the exit side.

  As shown in FIGS. 2 and 3, the vibration suppression device 50 has, as a basic element, a position in which the body 101 of the band saw blade 100 with the cutting edge 102 facing downward is sandwiched from both sides, in the traveling direction of the band saw blade 100. A pair of rollers 61 a, 61 a that are rotatably disposed along the spring, a spring 58 that applies a biasing force in the direction in which the body 101 of the band saw blade 100 is sandwiched between the pair of rollers 61 a, 61 a (in the direction of arrow E 1), and a band saw An antivibration gel 57 as a viscoelastic member arranged in series with the spring 58 at a position where the reaction force of the spring 58 acting when the body portion 101 of the blade 100 is sandwiched between the pair of rollers 61a and 61a. Have.

  In this case, the roller 61 a is constituted by the outer ring 61 a of the rolling bearing 61, and the outer periphery of the outer ring 61 a is in direct contact with the surface of the body 101 of the band saw blade 100. The antivibration gel 57 used as a viscoelastic member has a characteristic capable of attenuating vibrations of several tens to 500 Hz.

  Further, the position where the pair of rollers 61a and 61a sandwich the body portion 101 of the band saw blade 100 is from the middle position of the band width of the band saw blade 100 (the vertical dimension in FIGS. 2 and 3) to the galette bottom on the blade edge side. Between any position.

  The vibration suppressing device 50 includes an opening / closing mechanism 70 that opens and closes the swing arm 54 in addition to the housing 51 and the pair of swing arms 54 and 54 that support the roller 61a, the spring 58, and the vibration isolating gel 57. Yes. Details will be described below.

  The pair of swing arms 54, 54 are principally incorporated in a hollow portion 52 inside the housing 51, and the housing 51 has a pair of leg portions 55, located outside the pair of swing arms 54, 54. 55. The housing 51 is provided with two fulcrum pins 53 that are positioned above the band saw blade 100 and symmetrical with respect to the extension line L in the blade width direction of the band saw blade 100.

  The pair of oscillating arms 54 and 54 are arranged so that each oscillating end 54b is located on both sides of the band saw blade 100 in the blade thickness direction (left and right direction in FIGS. 2 and 3), and the two fulcrum pins By being supported by the respective pins 53 so as to be rotatable, they can be swung as indicated by arrows E in the thickness direction of the band saw blade 100 around the fulcrum pins 53 respectively.

  Here, the swing arm 54 is said to be open when swinging outward (in the direction of arrow E2 in FIG. 2), and the swing arm 54 is closed when swinging inward (in the direction of arrow E1 in FIG. 2). Say.

  Each of the pair of swing arms 54 and 54 is configured as a bell crank-shaped arm. That is, the tip of one arm part constituting the bell crank is the swing end 54b, and the other arm part is the operation arm part 54a, and the part where one arm part and the other arm part intersect is the part. The fulcrum pin 53 is rotatably supported. Further, the operation arm portions 54a of both swing arms 54 extend inward from the fulcrum pins 53 and wrap around each other.

  A support shaft 60 projects from the tip of each swing end 54 b of the pair of swing arms 54, 54 exposed from the lower end of the housing 51, and an inner ring 61 b of the rolling bearing 61 is formed on the outer periphery of the support shaft 60. The outer ring 61 a of the rolling bearing 61 that is fitted and fixed and is rotatable along the traveling direction of the band saw blade 100 is directly used as a roller 61 a that contacts the body portion 101 of the band saw blade 100. A collar 62 for positioning the rolling bearing 61 is mounted on the outer periphery of the support shaft 60.

  Further, by pressing the pair of swing arms 54 and 54 against the side surface of the body 101 of the band saw blade 100 against the leg portion 55 facing the outer surface of each swing arm 54 of the housing 51, a pair of swing arms 54, 54 is pressed. A spring (biasing means) 58 that applies a biasing force in a direction to sandwich the body 101 of the band saw blade 100 is disposed on the rollers 61a and 61a. The spring 58 is a compression coil spring.

  The antivibration gel 57 is disposed behind each spring 58 and is housed and held in a housing chamber 56 formed in the housing 51. A lid 59 is attached to the back surface of the storage chamber 56 for storing the antivibration gel 57 so that the back surface of the storage chamber 56 is opened and closed and the reaction force from the antivibration gel 57 is closed.

  The opening / closing mechanism 70 positions the pair of rollers 61a and 61a so as to sandwich the body portion 101 of the band saw blade 100 by swinging the pair of swing arms 54 and 54 inwardly (in the direction of arrow E1 in FIG. 2). On the other hand, by swinging the pair of swinging arms 54, 54 outward (in the direction of arrow E2 in FIG. 2) together, the pair of rollers 61a, 61a is moved to the body 101 of the band saw blade 100. It is moved to a position away from the sandwiching position.

  The opening / closing mechanism 70 of the present embodiment is disposed on the upper side of the swing arm 54 on the extension line L in the blade width direction of the band saw blade 100, and the portion where both the operation arm portions 54 a overlap is the blade width of the band saw blade 100. By moving downward along the direction, the pair of swinging arms 54, 54 are displaced to the open side as shown in FIG. 2, while by releasing the pushing movement, the pair of swinging arms 54, 54 are disengaged. As shown in FIG. 3, 54 is configured to be displaced to the closed side.

  Specifically, the opening / closing mechanism 70 has a pressing rod 71 that causes the lower end 78 to abut on the wrapping portion of both operation arm portions 54a and pushes and moves the wrapping portion of both operation arm portions 54a downward, and the pressing rod 71. The fluid pressure cylinder mechanism 70A that pushes and moves, and the return spring 73 that biases the pressing rod 71 in the direction to release the pushing movement.

  The pressing rod 71 is slidably inserted into a slide hole 72 formed in the housing 51 so as to be positioned on an extension line L of the band saw blade 100 in the blade width direction, and a lower end 78 is a cavity of the housing 51. It protrudes into the portion 53 and abuts on the upper surface of each operation arm portion 54 a of the pair of swing arms 54, 54. A cylinder (cylinder bore) 76 is connected to the upper side of the slide hole 72 via a spring accommodation hole 72a that accommodates a return spring 73, and a piston 74 is slidable in the vertical direction inside the cylinder 76. Contained.

  The piston 74 is connected to a proximal end (upper end in FIG. 2) of the pressing rod 71 that protrudes toward the cylinder 76, and the working chamber 75 of the cylinder 76 is disposed above the piston 74. The return spring 73 pushes the piston 74 and the pressing rod 71 and urges the piston 74 and the pressing rod 71 upward, which is the direction opposite to the moving direction.

  A fluid pressure cylinder mechanism 70A is configured by the cylinder 76, the piston 74, and the working chamber 75. By introducing fluid pressure (mainly hydraulic pressure, but also pneumatic pressure) into the working chamber 75 through the introduction pipe 80, The piston 74 is moved downward (in the direction of the arrow HB) against the urging force of the return spring 73, thereby depressing the operation arm portion 54 a of the swing arm 54 with the lower end 78 of the pressing rod 71, thereby As shown in FIG. 2, the pair of rollers 61 a and 61 a can be moved to a position away from a position sandwiching the body 101 of the band saw blade 100. Further, by releasing the fluid pressure in the working chamber 75, the piston 74 is moved upward (in the direction of the arrow HA) by the urging force of the return spring 73.

  Next, the operation of the vibration suppressing device 50 will be described.

  By introducing fluid pressure into the working chamber 75 of the fluid pressure cylinder mechanism 70A (opening / closing mechanism 70), the piston 74 can be pushed down, and as shown in FIG. The operation arm portions 54a of 54 and 54 are pushed down, the pair of swing arms 54 and 54 are displaced to the open side, and the pair of rollers 61a and 61a are separated from the positions sandwiching the body portion 101 of the band saw blade 100. Can do.

  Further, by releasing the fluid pressure in the working chamber 75, the downward pushing force applied to the pushing rod 71 can be removed, so that as shown in FIG. The body portion 101 of the band saw blade 100 can be sandwiched between the pair of rollers 61a and 61a. Therefore, in this state, the vibration of the band saw blade 100 in the blade thickness direction can be absorbed by the action of the spring 58 and the vibration isolating gel 57.

  At this time, since the pressing rod 71 and the piston 74 are urged in the direction opposite to the pushing movement direction by the force of the return spring 73, the spring 58 is not affected as much as possible by the weight of the pressing rod 71 and the piston 74. Can be transmitted to the roller 61a.

  In this way, the band saw blade 100 is vibrated in the blade thickness direction by the spring 58 provided separately from the roller 61a sandwiching the band saw blade 100 and the vibration-proof gel 57 which is a viscoelastic member arranged in series with the spring 58 ( Since chatter vibrations can be absorbed, it is not necessary to impart vibration absorbing action to the roller itself. In other words, it is not necessary for the roller 61a to be a vibration-proof roller whose outer periphery is made of rubber having a vibration absorbing action, and the outer periphery of the roller 61a can be made of metal or a material having wear resistance equal to or higher than that of metal. The wear of the roller 61a can be prevented.

  In addition, since the vibration is absorbed by the spring 58 and the vibration-isolating gel 57 that is a viscoelastic member, the vibration is not absorbed by rubber like the vibration-proof roller, so that the vibration suppressing effect of the band saw blade 100 can be enhanced.

  Further, since the spring 58 and the vibration isolating gel 57 are not in direct contact with the band saw blade 100, there is almost no wear and there is almost no troublesome maintenance. Therefore, chatter vibration of the band saw blade 100 can be sufficiently suppressed while maintaining productivity while being maintenance-free, and maintenance of product cut surface quality and prevention of vibration and noise can be achieved.

  Moreover, in this embodiment, since the outer ring | wheel 61a of the rolling bearing 61 is directly used as the roller 61a, a structure can be simplified.

  In addition, since the position where the body 101 of the band saw blade 100 is sandwiched by the roller 61a is set to a position between the intermediate position in the blade width direction of the band saw blade 100 and the bottom of the galette, chatter vibration of the band saw blade 100 is effectively suppressed. can do.

  Moreover, since the anti-vibration gel 57 having high vibration damping performance with respect to a specific frequency is used as the viscoelastic member, chatter vibration in the blade thickness direction of the band saw blade 100 can be effectively suppressed. Further, the vibration-proof gel 57 can be easily replaced by opening and closing the lid 59.

  Moreover, in this embodiment, since the vibration suppression apparatus 50 is arrange | positioned at the saw blade inserts 26 and 25, unlike the case where it provides independently, a support becomes stable and a structure becomes simple.

  In the present embodiment, the pair of swing arms 54 and 54 are configured as bell crank-shaped arms, and the swing arm 54 is moved by pushing and moving the wrapping portions of both operation arm portions 54a with the opening / closing mechanism 70. Since it is displaced to the open side, the pair of swinging arms 54 and 54 can be opened and closed while being synchronized by the single opening and closing mechanism 70, which can contribute to the simplification of the configuration.

  Furthermore, the vibration suppression model of the band saw blade 100 of the embodiment is shown in FIG.

  In this model, the vibration energy of the band saw blade 100 is absorbed by the spring element k (spring 58) and the damping element C (vibration isolation gel 57) while pressing both sides of the body of the band saw blade 100 of mass m with the force of F. Model.

  In the above embodiment, the case where both the pair of rollers 61a and 61a are supported by the spring 58 and the vibration isolating gel 57 is shown. However, only one of the rollers 61a is supported by the spring 58 or the vibration isolating gel 57. Even so, a certain degree of vibration absorption effect can be expected.

  In the above-described embodiment, the spring as the biasing means and the vibration-proof gel as the viscoelastic member are arranged in series to attenuate the vibration that cannot be suppressed by the roller attenuator with the vibration-proof gel (low-frequency vibration). Is pressed to some extent with a spring and high frequency components are pressed with a highly responsive vibration-proof gel. However, the spring and the vibration-proof gel are arranged in parallel (for example, in the case of FIG. A gel 57 may be disposed). In the case of this parallel arrangement, independent damping effects on the roller and the spring can be obtained as in the case of the series arrangement. Furthermore, the biasing means is not limited to the spring, and the viscoelastic member is not limited to the vibration-proof gel.

1 Band saw machine 25, 26 Saw blade insert (saw blade guide)
DESCRIPTION OF SYMBOLS 50 Vibration suppression apparatus 51 Housing 53 Supporting pin 54 Oscillating arm 54a Operation arm part 54b Oscillating end 56 Storage chamber 57 Anti-vibration gel (viscoelastic member)
58 Spring (biasing means)
59 Lid 60 Support shaft 61 Rolling bearing 61a Roller (outer ring)
70 Opening / Closing Mechanism 70A Fluid Pressure Cylinder Mechanism 71 Press Rod 73 Return Spring 74 Piston 75 Working Chamber 76 Cylinder 100 Band Saw Blade 101 Body 102 Cutting Edge L Extension Line in Band Width of Band Saw Blade

Claims (9)

In the band saw blade vibration suppression device in the band saw machine that performs cutting processing on the workpiece by moving the endless band saw blade in the cutting direction while circulating in a fixed direction,
In a section where cutting work is performed on the workpiece, at least one of the band saw blade on the entry side and the exit side with respect to the workpiece is sandwiched from both sides so as to be rotatable along the traveling direction of the band saw blade. A pair of rollers arranged,
An urging means for applying an urging force in a direction of sandwiching the body portion of the band saw blade to at least one of the pair of rollers;
A viscoelastic member arranged in a predetermined row with the biasing means at a position to receive a reaction force of the biasing means acting when the body portion of the band saw blade is sandwiched between the pair of rollers;
A device for suppressing vibration of a band saw blade in a band saw machine. A device for suppressing vibration of a band saw blade in the band saw machine according to claim 1,
The apparatus for suppressing vibration of a band saw blade in a band saw machine, wherein the roller is constituted by an outer ring of a rolling bearing, and an outer periphery of the outer ring is in direct contact with a surface of a body portion of the band saw blade. A device for suppressing vibration of a band saw blade in the band saw machine according to claim 1 or 2,
By being rotatably supported by two fulcrums arranged symmetrically with respect to the extension line in the blade width direction of the band saw blade so that the swing ends are located on both sides in the blade thickness direction of the band saw blade. A pair of swing arms are arranged so as to be swingable in the thickness direction of the band saw blade around the fulcrum, respectively.
The rollers are mounted on the swinging ends of the pair of swinging arms via a support shaft so as to be rotatable along the traveling direction of the band saw blade,
A housing having the two fulcrums is provided outside the pair of swing arms,
By moving the pair of swing arms together in the housing together, the pair of rollers is moved to a position sandwiching the body portion of the band saw blade, while the pair of swing arms are moved together. An opening / closing mechanism for moving the pair of rollers to a position away from a position sandwiching the body portion of the band saw blade by swinging outward is provided,
By pressing the pair of swing arms toward the surface of the body portion of the band saw blade at a position facing the outer surface of each swing arm of the housing, the band saw blade is pressed against the pair of rollers. The urging means for applying an urging force in a direction sandwiching the trunk portion is disposed,
A band saw blade vibration suppressing device in a band saw machine, wherein the viscoelastic member is disposed behind the biasing means while being held by the housing. A vibration suppressing device for a band saw blade in the band saw machine according to claim 3,
A housing chamber for the viscoelastic member is provided in the housing, and a lid body that opens and closes the back surface of the housing chamber and receives a reaction force from the viscoelastic member in a closed state is detachably attached to the back surface of the housing chamber A device for suppressing vibration of a band saw blade in a band saw machine. A band saw blade vibration suppressing device in the band saw machine according to claim 3 or 4,
In each of the pair of swing arms, the tip of one arm portion is the swing end and the other arm portion is an operation arm portion, and the portion where the one arm portion and the other arm portion intersect is the fulcrum. It is configured as a bell crank-shaped arm that is rotatably supported by the control arm, and the operation arm portions of the two swing arms extend inward from the fulcrums and wrap around each other.
The pair of oscillating arms are displaced to the open side by pushing and moving the wrapping portions of the operating arm portions along the blade width direction of the band saw blade on the extension line in the blade width direction of the band saw blade. An apparatus for suppressing vibration of a band saw blade in a band saw machine, wherein the opening / closing mechanism that displaces the pair of swinging arms toward the closed side by releasing the pushing movement is provided. A band saw blade vibration suppressing device for a band saw machine according to claim 5,
The opening / closing mechanism is
A pressure rod that is slidably disposed along the blade width direction of the band saw blade in the housing, and pushes and moves the lap portions of the two operation arm portions at the tip along the blade width direction of the band saw blade;
A piston connected to a proximal end of the pressing rod; the piston is slidably received in a cylinder formed in the housing; and fluid pressure is introduced into a working chamber of the cylinder, whereby the piston A fluid pressure cylinder mechanism that pushes and moves the pressing rod via
A return spring that urges the piston and the pressing rod in a direction opposite to the pushing movement direction;
A band saw blade vibration suppressing device in a band saw machine, characterized by comprising: It is a vibration suppression device of the band saw blade in the band saw machine according to any one of claims 1 to 6,
A vibration suppression device for a band saw blade in a band saw machine, wherein an anti-vibration gel capable of attenuating vibrations of several tens Hz to 500 Hz is used as the viscoelastic member. It is a vibration suppression device of the band saw blade in the band saw machine according to any one of claims 1 to 7,
The band saw blade vibration in the band saw machine is characterized in that the position of sandwiching the body portion of the band saw blade between the pair of rollers is set between the middle position of the blade width of the band saw blade and the galette bottom on the blade tip side. Suppression device. A vibration suppression device for a band saw blade in the band saw machine according to any one of claims 1 to 8,
A saw blade guide that supports the band saw blade so that the band saw blade can run while the direction of the edge of the band saw blade is directed toward the workpiece is provided on the entry side and the exit side of the band saw blade with respect to the workpiece, and is disposed on the saw blade guide. A device for suppressing vibration of a band saw blade in a band saw machine.

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