JP3967372B2 - How to cut a workpiece with a band saw - Google Patents

Description

  The present invention relates to a workpiece cutting method using a band saw machine having an endless band saw blade, and more particularly to a cutting method for cutting a workpiece by applying vibration in the cutting direction of the band saw blade with respect to the workpiece.

  The band saw machine includes a horizontal band saw machine and a saddle type band saw machine, and the band saw blade used in the band saw machine is configured in an endless manner by joining both ends of the band-like saw blade by welding. When cutting a workpiece using such an endless band saw blade, swing cutting has been developed in order to cut the workpiece with a reduced cutting length (see, for example, Patent Document 1).

  For example, in the case of a horizontal band saw, the rocking cutting is performed by cutting the workpiece by alternately inclining the band saw blade in a right-down state and a left-down state. That is, the workpiece is cut by tilting the band saw blade to the right or to the left by slowly and alternately tilting the saw blade housing with the band saw blade to the right or left. is there. A structure has been developed in which the band saw blade is inclined to the right or left by moving the guide roller provided in the band saw blade guide device for guiding the band saw blade in the cutting direction when performing the above-described swing cutting ( Patent Document 2).

Furthermore, when performing oscillating cutting as described above, a wave-shaped undulation is formed on the back of the band saw blade, and when the ridge portion of the undulation is positioned at one band saw blade guide device, the undulation valley portion is formed. As a configuration located in the other band saw blade guide device, a technique of swinging and cutting a workpiece by tilting the band saw blade downward or leftward has been developed (see Patent Document 3).
JP-A-56-107825 JP 2003-305613 A JP-A-9-300131

  By the way, the band saw blade is generally subjected to gear cutting using a milling cutter in a gear cutting machine most suitable for mass production. Therefore, the band width accuracy of the band saw blade (the degree of variation when the distance from the tip of the tooth tip formed by gear cutting to the back of the band saw blade is measured) is determined by the accuracy of the gear cutter and the milling cutter. Although it is determined by the accuracy and the like, even if the band width accuracy of the band saw blade obtained by this processing is good, there is a variation of 0.03 to 0.05 mm.

  One band saw blade is formed with several hundred or more tooth tips. Here, the amount of cutting per tooth of the band saw blade will be considered. The incision amount amm per tooth is defined as follows: the workpiece height in the incision direction is Hmm, the distance between the tooth tips of the band saw blade is Pmm, the rotation speed (saw speed) of the band saw blade is Vm / min, and the cutting time is tmin. It can be expressed by the following formula.

a = (H × P) / (1000 × V × t) mm
Next, in order to perform a specific calculation, a representative sample is extracted and calculated from a cutting condition table mounted on a blade (band saw blade) catalog of Amada Co., Ltd. 2000.

(1) S45C (JIS) φ100 The tooth pitch interval P of the band saw blade is 7.3 mm.

Band saw blade rotation speed V: 48-72 m / min
Cutting time t: 1.5 to 2.2 min
Under this condition, the minimum value of the cutting depth a per tooth is (100 × 7.3) / (1000 × 72 × 2.2) = 0.0046 mm
The maximum value is (100 x 7.3) / (1000 x 48 x 1.5) = 0.0101 mm
It becomes.

(2) SUS304 (JIS) φ500 The tooth gap interval P of the band saw blade is 19.5 mm.

Band saw blade rotation speed V: 17-26 m / min
Cutting time t: 90 to 168 min
The minimum value of the cutting depth a per tooth under this condition is (500 × 19.5) / (1000 × 26 × 168) = 0.0002 mm
The maximum value is (500 x 19.5) / (1000 x 17 x 90) = 0.0064 mm
It becomes.

  As understood from the above, generally, the average cutting amount per tooth of the band saw blade is 0.01 mm or less.

  However, as described above, even if the band width accuracy of the band saw blade is good, there is a variation of 0.03 to 0.05 mm. In other words, the cutting amount per tooth is smaller than 1/3 of the band width accuracy, and when cutting is performed in such a state, only a tooth having a relatively wide band is cut in the band width variation. There is a problem that all teeth do not work.

  Further, it can be easily estimated that there are teeth that move without rubbing the cutting surface while merely rubbing the cutting surface. Presumably, these rubbing teeth generate unpleasant noise and generate extra heat.

  The present invention has been made in view of the above-described problems, and is a method for cutting a work by a band saw machine, in which a band saw that guides a tooth tip in an endless band saw blade provided in the band saw machine in the work direction. When the blade guide device is provided with vibration applying means, and the vibration applying means applies vibration in the cutting direction of the band saw blade to the workpiece to cut the workpiece, the amplitude of vibration in the cutting direction of the band saw blade is 0. It is about 03 to 0.5 mm, and the frequency of the vibration is several Hz to several hundred Hz.

  Further, a work cutting method using a band saw machine, comprising: a vibration applying means provided in a band saw blade guide device for guiding a tooth tip in an endless band saw blade provided in the band saw machine in a work direction; and the vibration applying means. When the workpiece is cut by applying vibration in the cutting direction of the band saw blade to the workpiece by the above, each vibration applying means provided in the pair of band saw blade guide devices for guiding the band saw blade is synchronized or in an unsynchronized state. A vibration in the cutting direction is applied to the band saw blade, the amplitude of the vibration in the cutting direction of the band saw blade is about 0.03 to 0.5 mm, and the frequency of the vibration is several Hz to several hundred Hz. It is what.

  According to the present invention, since the band saw blade is subjected to vibration in the cutting direction of the band saw blade with respect to the workpiece to cut the workpiece, all the teeth corresponding to the workpiece in the band saw blade are cut into the workpiece, Efficient cutting can be performed.

  The configuration of the band saw machine is well known, but in order to facilitate understanding, the configuration of a horizontal band saw machine as an example of the band saw machine will be schematically described.

  Referring to FIG. 1, the band saw machine 1 includes a base frame 3, and the base frame 3 includes a vise device 5 that can fix a workpiece W to be cut. Further, the base frame 3 is provided with a saw blade frame 9 provided with an endless band saw blade 7 so as to be movable toward and away from the workpiece W. The saw blade frame 9 An appropriate cutting operation actuator 11 such as a hydraulic cylinder or the like is provided. The saw blade housing 9 has guide arms 13A and 15A provided with band saw blade guide devices 13 and 15 for guiding the tooth tips of the band saw blade 7 in the direction of the workpiece W at the tip (lower end). Is provided. As is well known, the guide arms 13A and 15A are supported by a guide beam 14 provided in the saw blade housing 9, and one guide arm 13A is fixed to the guide beam 14. is there. The other guide arm 15A is provided so that its position can be adjusted in a direction approaching and separating from the guide arm 13A corresponding to the size of the workpiece W. In addition, since the structure of this kind of band saw machine is known, the more detailed description about the structure of a band saw machine is abbreviate | omitted.

  In the band saw machine 1 having the above-described configuration, when the band saw blade 7 is separated from the workpiece W by the operation of the actuator 11, the band saw blade 7 is driven to travel, and the saw blade housing 9 is moved by the operation of the actuator 11. By moving the band saw blade 7 in the cutting direction with respect to the workpiece W, the workpiece W is cut by the band saw blade 7.

  As described above, when the band saw blade 7 is driven to travel and the band saw blade 7 is moved relative to the workpiece W in the cutting direction to cut the workpiece W, the band saw blade 7 is connected to the band saw blade guide device 13, 15 is guided and supported on both sides of the workpiece W. Accordingly, the band saw blade 7 is elastically deformed and slightly curved between the band saw blade guide devices 13 and 15 due to the reaction force of the cutting resistance of the workpiece W. If there is a slight difference in height between the saw blades in the band saw blade 7 due to a manufacturing error or the like, there may be saw blades that do not contribute to the cutting of the workpiece W.

  Therefore, in the present embodiment, the band saw blade guide devices 13 and 15 are provided with vibration applying means, and the vibration applying means applies vibration in the cutting direction to the work W to the band saw blade 7. More specifically, the band saw blade guide devices 13 and 15 hold the body portion of the band saw blade 7 from both sides and abut the back portion of the band saw blade 7 in the same manner as the conventional general band saw blade guide device. The band saw blade 7 guides the tooth tip in the direction of the workpiece W, and the band saw blade guide devices 13 and 15 include a motor and the like as shown conceptually and schematically in FIG. Rotating bodies 19A and 19B that are rotated (rotated) by rotating actuators 17A and 17B are provided.

  The rotating bodies 19A and 19B rotate in contact with the back portion of the band saw blade 7, and include concave portions (portions having a small radius from the rotation center) 21A and 21B and convex portions (portions having a large radius from the rotation center). ) 23A and 23B are formed in a non-circular shape with substantially equal pitches.

  Therefore, as shown in FIG. 2 (A), the recesses 21A and 21B in the rotary bodies 19A and 19B are in a state of facing the back portion of the band saw blade 7, and the band saw blade 7 travels (moves) horizontally, for example, in this state. When the workpiece W is being cut, the rotating actuators 17A and 17B are rotated synchronously so that the convex portions 23A and 23B of the rotating bodies 19A and 19B face the back portion of the band saw blade 7. The band saw blade 7 is pressed in the cutting direction of the band saw blade 7 by the convex portions 23A and 23B of the rotating bodies 19A and 19B. Therefore, the band saw blade 7 positively cuts the workpiece W (see FIG. 2B).

  Then, when the convex portions 23A, 23B of the rotating bodies 19A, 19B are both in contact with the back portion of the band saw blade 7, the band saw blade 7 again moves horizontally (see FIG. 3 (A)). When the rotating bodies 19A and 19B are further rotated so that the concave portions 21A and 21B of the rotating bodies 19A and 19B again face the back of the band saw blade 7, the pressing of the band saw blade 7 is temporarily released. Thus, the band saw blade 7 moves so as to be slightly separated from the workpiece W (see FIG. 3B).

  That is, when the rotary bodies 19A and 19B are rotated in synchronization, the concave portions 21A and 21B and the convex portions 23A and 23B of the rotary bodies 19A and 19B are alternately opposed to and contacted with the back portion of the band saw blade 7. 7 vibrates in the cutting direction with respect to the workpiece W. Therefore, when the saw blade frame 9 moves relatively in the cutting direction with respect to the workpiece W and performs the cutting action by the band saw blade 7, the band saw blade 7 vibrates in the cutting direction, whereby the band saw with respect to the workpiece W is obtained. The cutting operation of the blade 7 is performed shockingly, and the abrupt slight movement of the band saw blade 7 away from the workpiece W is repeated.

  Therefore, when the band saw blade 7 is pressed and moved in the workpiece W direction by the rotating bodies 19A and 19B, all the saw teeth 7T facing the workpiece W are cut into the workpiece W, and the cutting with respect to the workpiece W is effectively performed. As a result, an efficient cutting process can be performed. Further, when the band saw blade 7 slightly moves away from the workpiece W, it acts to peel off the cut chips from the workpiece W, thereby reducing the cutting resistance. Therefore, it is easy to suppress the heat generation by cutting resistance while cutting the chips short and improving the dischargeability of the chips. Therefore, the life of the band saw blade 7 can be improved.

  In the above description, the case where the concave portions 21A and 21B or the convex portions 23A and 23B of the rotating bodies 19A and 19B are simultaneously pressed against the back portion of the band saw blade 7 has been described. However, it is also possible to adopt a configuration in which the concave portion of one rotary body and the convex portion of the other rotary body of the rotary bodies 19A and 19B are simultaneously opposed to the back portion of the band saw blade 7. That is, it is possible to rotate the left and right rotators 19A and 19B with different phases, and to rotate the left and right rotators 19A and 19B with different rotational speeds. Even in this case, the band saw blade 7 can be vibrated in the cutting direction, and the effects as described above can be obtained.

  By the way, it is desirable that the amplitude of the vibration in the cutting direction of the band saw blade 7 with respect to the workpiece W is about 0.03 to 0.05 mm in consideration of the band width accuracy due to the manufacturing error of the band saw blade 7. That is, when cutting the workpiece W by the band saw blade 7, the band saw blade 7 is vibrated in the cutting direction so that the saw blade 7T is effectively cut in the band saw blade 7 with respect to the workpiece W, but the cutting amount is too large. In some cases, the load on the saw blade 7T is increased, and in some cases, a tooth missing is generated. Therefore, in order for almost all of the saw blades 7T to contribute to the cutting of the workpiece W, it is desirable to vibrate with an amplitude that can absorb an error in bandwidth accuracy.

  The frequency of the vibration in the cutting direction to be applied to the band saw blade 7 is preferably several Hz to several hundred Hz depending on the traveling speed of the band saw blade 7. That is, as the frequency is increased, the number of repetitions of the cutting of each saw tooth 7T with respect to the work W is increased, and the cutting length of the work W per tooth in the band saw blade 7 is shortened. Therefore, although the generated chips are shortened and the discharge property is improved, the number of repetitions in which a large load due to impact cutting and cutting resistance of the saw tooth 7T with respect to the workpiece W is increased. Therefore, considering the life reduction due to the repeated load acting on each saw tooth 7T in the band saw blade 7, the frequency is preferably in the range of several Hz to several hundred Hz. In addition, in the configuration in which the band saw blade 7 brazes the cemented carbide tip or the like to the tooth tip, it becomes a mode of facilitating the falling of the cemented carbide tip due to the impact load acting, so it is desirable to increase the frequency. It is not a thing.

  When there is a relationship between the traveling speed of the band saw blade 7 and the frequency in the cutting direction, as shown in FIGS. 2 (A), 2 (B) and 3 (A), (B), the band saw blade 7 Each time the saw blade 7T moves by about one pitch of the saw blade 7T provided for the cutting, the cutting by the vibration of the band saw blade 7 with respect to the workpiece W is repeated, and the length of the chip is substantially equal to the pitch of the saw blade 7T. Become length. That is, it becomes extremely short compared with the length of the chips at the time of general cutting or vibration cutting without applying vibration in the cutting direction of the band saw blade 7 to the workpiece W. Therefore, the chip discharging property is improved.

  Further, since the sawtooth 7T is cut into the workpiece W by applying vibration in the cutting direction of the band saw blade 7, each of the workpieces W with respect to the workpiece W is shown in FIGS. 2 (B) and 3 (A). Even in the case of a workpiece in which the bite of the saw-tooth 7T is improved and work hardening is likely to occur, the lower side of the work hardening layer is cut, and cutting can be easily performed.

  By the way, as a configuration for applying vibration in the cutting direction to the band saw blade 7, as shown in FIG. 4 (A), the shapes of the rotating bodies 19A and 19B may be formed in a polygonal shape, or FIG. 4 (B). , (C), the rotating bodies 19A and 19B can be appropriately formed eccentric cams or eccentric rollers. That is, when the rotating bodies 19A and 19B rotated by the actuator are made into a non-circular shape, various shapes can be employed. Further, the shapes of the pair of rotating bodies 19A and 19B may be different from each other.

  Further, as shown in FIG. 5, the swing saw 27 provided in the band saw blade guide devices 13 and 15 so as to be swingable about the pivot 25 is brought into contact with the back portion of the band saw blade 7 to restrict the back side movement. It is also possible to provide a configuration in which a backup roller 29 is rotatably provided and a non-circular rotating body 19 is brought into contact with the backup roller 29 to rotate. According to this configuration, vibration in the cutting direction can be applied to the band saw blade 7 indirectly via the backup roller 29 by rotating the rotating body 19 by the actuator 17.

  Furthermore, as shown in FIG. 6A, it is possible to provide a structure in which one end side of the swing rod 27 is provided long and a rotating body 19 that is rotated by an actuator is provided on the swing rod 27. In this case, instead of the backup roller 29, as shown in FIG. 6B, the backup chip 31 may be configured to include a swinging rod 27.

  Further, as shown in FIG. 7A, it is also possible to have a configuration in which a backup roller 29 is provided on one end side of the swing rod 27 and a rotating body 19 rotated by an actuator is provided on the other end side. Further, as shown in FIG. 7 (B), it is possible to employ a configuration in which a rotating body 19 is provided on both ends of the swing rod 27. In this case, as shown in FIG. 7C, the diameters of both rotating bodies 19 can be different. Furthermore, as shown in FIG. 7D, it is also possible to have a configuration in which a belt 33 having protrusions on the outer peripheral surface at appropriate intervals is wound around the backup roller 29.

  That is, various configurations can be adopted as a configuration for applying vibration in the cutting direction to the band saw blade 7 by the rotating body rotated by the actuator.

  As a configuration for applying the vibration in the cutting direction to the band saw blade 7, a configuration as shown in FIG. That is, in the band saw blade guide device, a flange portion 35F that abuts and supports the back portion of the band saw blade 7 is provided on one of a pair of guide rollers 35A and 35B that hold and guide the band saw blade 7 from both sides. It is set as the structure which provided the protrusion part 35P in the part which contact | abuts and supports the back part of the band saw blade 7 at an appropriate space | interval. According to this configuration, every time the back portion of the band saw blade 7 is supported by the projecting portion 35P, the band saw blade 7 is pressed downward, and the band saw blade 7 can be given vibration in the cutting direction. .

  Further, as a configuration for applying vibration in the cutting direction to the band saw blade 7, as shown in FIG. 9, an actuator 37 such as a solenoid or a mini cylinder is appropriately provided in the band saw blade guide devices 13 and 15. It is also possible to have a configuration in which the back portion of the band saw blade 7 is directly or indirectly struck by the operating rod 39 provided to the actuator 37 so as to be able to reciprocate or by the striker 41 provided at the tip of the operating rod 39. Is possible.

  According to the above configuration, the operating period of the actuator 37 can be arbitrarily changed, and the output of the band saw blade 7 with respect to the work can be controlled by controlling the output. Furthermore, by controlling the stroke amount of the operating rod 39, the amplitude of the vibration in the cutting direction applied to the band saw blade 7 can also be controlled. Therefore, according to the above configuration, the frequency and amplitude of the band saw blade 7 in the cutting direction and the cutting force (excitation force) of the saw blade on the workpiece are controlled in accordance with the material, shape, dimensions, etc. of the workpiece to be cut. Is possible.

  As understood from the above description, in the present embodiment, in short, in the band saw blade guide devices 13 and 15 that hold and guide the band saw blade 7 so that the tooth tip of the band saw blade 7 is directed in the work direction, Alternatively, a vibration applying means is provided in the vicinity of the band saw blade guide devices 13 and 15, and the vibration applying means applies vibration in the cutting direction of the band saw blade to the work W to the band saw blade 7 to cut the work W. Therefore, even if there is a slight difference in the height of the saw blades 7T in the band saw blade 7, all the saw teeth 7T in the band saw blade 7 contribute to the cutting of the workpiece W and perform efficient cutting. Can do.

  Furthermore, as described above, by oscillating the band saw blade 7 in the cutting direction, the cutting performance of the saw blade for the workpiece is improved, so that even in the case of a workpiece that tends to cause work hardening, it can be cut well. The length of the chips generated when the workpiece is cut can be shortened, and the dischargeability of the chips can be improved.

  Note that the present invention is not limited to the above-described embodiment, and can be implemented in other modes by making appropriate modifications. That is, in the above description, it has been described that the rotating bodies 19A and 19B are rotationally driven by the rotation actuators 17A and 17B such as motors, but the rotation actuator is omitted and the rotation of the band saw blade 7 is followed. It is also possible to have a configuration that rotates.

  FIG. 10 shows still another embodiment. In this embodiment, a rotating shaft 55 is rotatably supported by a gear box 53 attached to the upper portion of one guide arm 13A via a bracket 51. The rotating shaft 55 is rotated by a motor 57 attached to the gear box 53. The transmission of rotation from the motor 57 to the rotating shaft 55 is performed via a bevel gear mechanism, a worm gear mechanism, or the like provided in the gear box 53.

  A cam 59 having an appropriate shape such as a polygonal shape is integrally attached to one end side of the rotation shaft 55, and the other guide arm 15 </ b> A parallel to the guide beam 14 is attached to the other end side of the rotation shaft 55. A spline shaft 55S extending horizontally to the side is provided. The spline shaft 55S is spline-fitted so as to be slidable in the axial direction relative to a spline sleep 63 supported only rotatably on a bearing 61 provided on the upper portion of the guide arm 15A. A cam 65 similar to the cam 59 is attached to the end side of the spline sleep 63.

  A bracket 67 (see FIG. 11) is provided above the guide arms 13A and 15A corresponding to the cams 59 and 65, and a swing arm 71 is connected to the bracket 67 via a pivot 69. Each is supported so as to be swingable in the vertical direction. Each swing arm 71 is rotatably provided with a cam follower 73 that is pressed downward by the arms 59 and 65. Further, an upper end portion of a pressing rod 75 supported by the guide arms 13A and 15A so as to move up and down is in contact with the lower surface on the front end side of each swing arm 71.

  The lower end portion of each pressing rod 75 is in contact with a backup holding member 77 provided in the band saw blade guide devices 13 and 15. That is, the band saw blade guide devices 13 and 15 are provided with a sandwich guide member 79 for sandwiching and guiding the band saw blade 7 from both sides, as in a general band saw blade guide device. Then, the base end side of the backup holding member 77 provided with a back pressing member 81 such as a backup or backup roller capable of pressing the back portion of the band saw blade 7 is pivotally pivoted up and down via a pivot 83. In addition, the front end portion (lower end portion) of the pressing rod 75 is in contact with the front end portion side of the backup holding member 77 so as to press the back pressing member 81 toward the band saw blade 7 side.

  With the above configuration, when the motor 57 is rotationally driven, the cams 59 and 65 on the side of the guide arms 13A and 15A are simultaneously rotated by the rotating shaft 55 as an example of power transmission means. Therefore, when the swing arms 71 are swung downward via the cam followers 73 by the rotation of the cams 59 and 65, the backup holding member 77 is moved in the direction of the band saw blade 7 by the tip of each pressing rod 75. Press. Therefore, the band saw blade 7 is pressed in the direction of cutting into the workpiece via the back pressing member 81. When the pressing by the cams 59 and 65 is released (when the concave portions of the cams 59 and 65 correspond to the cam follower 73), the band saw blade 7 and the pressing rod 75 are moved by the cutting resistance in the main component (back component) direction. It will be a mode to be returned.

  That is, also in the above configuration, the workpiece can be cut by applying vibration in the cutting direction to the band saw blade 7.

  Further, as shown in FIG. 12, a cylindrical cam and a surface cam rotated by a motor M mounted on a guide arm 13A (15A) as a configuration for imparting to the band saw blade 7 vibration in the cutting direction of the band saw blade 7 with respect to the workpiece. For example, the cam follower CF provided in the backup holding member 77 can be moved up and down by an appropriate cam C. Furthermore, the support block 85 provided with the backup roller 29 and the like can be configured to move up and down by an actuator AC such as a fluid cylinder or a solenoid.

  Further, as a configuration for imparting vibration in the cutting direction of the band saw blade 7 to the workpiece to the band saw blade 7, the guide beam 14 supporting the guide arms 13A and 15A is moved in the vertical direction (cutting direction of the band saw blade 7) by an appropriate actuator. It is also possible to adopt a configuration that vibrates or a configuration in which the cutting blade actuator 9 is vibrated by oscillatingly driving the cutting operation actuator 11 to impart vibration in the cutting direction to the band saw blade 7. Further, a motor having an eccentric weight is attached to the saw blade housing 9, and the saw blade housing 9 is vibrated by rotating the motor, and the vibration in the cutting direction of the band saw blade 7 with respect to the workpiece is caused by this vibration. It is also possible to adopt a configuration that is given to

  That is, as a configuration for applying vibration in the cutting direction of the band saw blade 7 to the workpiece to the band saw blade 7, a configuration for directly applying vibration to the band saw blade 7 or a configuration for supporting the band saw blade 7 is applied. Various configurations such as a configuration in which vibration is indirectly applied to the band saw blade 7 can be employed.

It is front explanatory drawing which shows the whole structure of the horizontal type | mold band saw machine as an example of a band saw machine. It is explanatory drawing which shows description of the structure which provides the vibration of a cutting direction to the band saw blade with which the band saw was equipped, and operation | movement of a saw blade. It is explanatory drawing which shows description of the structure which provides the vibration of a cutting direction to the band saw blade with which the band saw was equipped, and operation | movement of a saw blade. It is explanatory drawing which shows the various structure for providing the vibration of a cutting direction to a band saw blade. It is explanatory drawing which shows the structure for providing the vibration of a cutting direction to a band saw blade. It is explanatory drawing which shows the structure for providing the vibration of a cutting direction to a band saw blade. It is explanatory drawing which shows the structure for providing the vibration of a cutting direction to a band saw blade. It is explanatory drawing which shows the structure for providing the vibration of a cutting direction to a band saw blade. It is explanatory drawing which shows the structure for providing the vibration of a cutting direction to a band saw blade. It is explanatory drawing which shows the structure of another form for providing the vibration of a cutting direction to a band saw blade. It is side surface explanatory drawing of the principal part for providing the vibration of a cutting direction to a band saw blade. It is explanatory drawing which shows the structure of another form for providing the vibration of a cutting direction to a band saw blade.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Band saw machine 7 Band saw blade 13, 15 Band saw blade guide apparatus 17A, 17B Rotating actuator 19A, 19B Rotating body 21A, 21B Recessed part 23A, 23B Convex part 27 Oscillating rod 29 Backup roller 37 Actuator 39 Actuating rod 41 Batter

Claims (2)

  A method of cutting a work by a band saw machine, comprising: a vibration applying means in a band saw blade guide device for guiding a tooth tip of an endless band saw blade provided in the band saw machine in a work direction, and the vibration applying means When the workpiece is cut by applying vibration in the cutting direction of the band saw blade to the band, the amplitude of vibration in the cutting direction of the band saw blade is about 0.03 to 0.5 mm, and the frequency of the vibration is several Hz. A cutting method for a workpiece characterized by being several hundred Hz.   A method of cutting a work by a band saw machine, comprising: a vibration applying means in a band saw blade guide device for guiding a tooth tip of an endless band saw blade provided in the band saw machine in a work direction, and the vibration applying means When the workpiece is cut by applying vibration in the cutting direction of the band saw blade to the band saw, the vibration applying means provided in the pair of band saw blade guide devices for guiding the band saw blade is synchronized or in an unsynchronized state. The blade is given vibration in the cutting direction, the amplitude of the vibration in the cutting direction of the band saw blade is about 0.03 to 0.5 mm, and the frequency of the vibration is several Hz to several hundred Hz. How to cut the workpiece.