JP2016159413A - Ultrasonic cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic cutting device in which the thickness of a cutting blade can be reduced and stable vertical vibration resonance can be maintained.SOLUTION: A thin and band-like long cutting blade 13 is made to be a resonance body and ends on the excitation side and the opposite side in the whole length are made to be antinodes of vibration. The end on the excitation side of the cutting blade 13 is fixed to an excitation horn 15 and the end on the opposite side is fixed to a support horn 16. The support horn 16 is held on a bearing plate 4 fixed on a base 2. The excitation horn 15 is held on a bearing plate 3 moving via a linear guide rail 5 provided along the longitudinal direction of the cutting blade 13 on the base 2 and a linear guide block 6 sliding along the linear guide rail. Triangular cuts 17 are provided on the tip surfaces of the excitation horn 15 and the support horn 16. A pair of holding pieces 18, 19 sliding along the inclined surfaces of the cuts is arranged in the cuts 17. A gap between the pair of holding pieces 18, 19 is narrowed. The cutting blade 13 is held and fixed between the pair of holding pieces 18, 19.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ultrasonic cutting apparatus, and more particularly to an ultrasonic cutting apparatus that can be shaped into a predetermined shape but is suitable for use in cutting a member that is soft and deforms when a force is applied.

  Conventionally, a technique for cutting a member by applying ultrasonic vibration to a cutting blade is well known and can be shaped into a predetermined shape, but it is soft and deforms when force is applied, for example, extremely In order to cut clay-like things like ceramics before sintering, which is a mixture of fine particles and water, it is effective to use a thin cutting blade with a thin thickness and a strip shape. Various such devices have been devised in the prior art.

  By the way, the thinner the cutting blade used in such an apparatus, the more advantageous it is for cutting as long as it maintains stable longitudinal vibration resonance. However, conventional cutting blades generally have a considerable thickness, and most of them have a thickness of 1 mm or more. Therefore, deformation of the cutting surface of the workpiece is unavoidable, and thus cutting with a thinner cutting blade can be realized. It is requested.

  In addition, such a cutting apparatus is also required to be quick in replacing the cutting blade when the cutting blade is worn or broken.

  In order to maintain the longitudinal vibration resonance that is thinner and thinner than the conventional cutting blade as described above, the following two points are necessary. It is.

  First, the first point is how to apply vibration to the cutting blade. The cutting blade itself is a resonator, and the end of the entire length opposite to the excitation side is a belly or node. When the end is a belly, it is supported by a support horn, and when the end is a node, it is supported by a support block, and the cutting blade is stable. Appropriate tension is applied.

  Next, the second point is how to fix the end of the cutting blade to the excitation horn or the support horn.

  When the thickness of the cutting blade is thin and long, vibration modes other than the vibration mode necessary for cutting tend to occur. That is, the vibration mode necessary for cutting is longitudinal vibration, but other lateral vibrations and torsional vibrations are likely to occur. That is, if the thickness of the cutting blade is 1 mm or more, it has sufficient rigidity so that it will not bend, but if it is less than that, it will bend, and this will easily cause lateral vibration and torsional vibration. If lateral vibration or torsional vibration is generated, the cutting efficiency is lowered and the cutting blade may be broken.

  In order to prevent bending of the thin and long cutting blade or to stabilize the vibration mode to longitudinal vibration, the cutting blade itself is used as a resonator and the cutting blade in its entire length is provided on the excitation side. The end opposite to the side is either a vibration antinode or a node, and if the end is an antinode, it is a support horn, and if the end is a node, it is a support block. It is important to provide support and to apply appropriate tension to supplement the rigidity and to fix the end of the cutting blade to the vibration horn or support horn.

  Japanese Patent Application Laid-Open Publication No. 2004-151561 discloses a conventional apparatus that substantially satisfies the first point. However, the technique disclosed in Patent Document 1 has a problem in how to apply tension to the cutting blade and how to fix the end of the cutting blade to the vibration horn and the support horn, and the cutting blade is bent or twisted. This cannot be prevented and the vibration mode cannot be stabilized.

  The method of applying tension to the cutting blade in the apparatus shown in Patent Document 1 is as shown in FIG. 11, and a vibrating horn (not shown) that supports both ends of the cutting blade 100 and a support. A tension adjusting rod 102 having a male screw 102a carved at its tip protrudes from the surface of the horn 101 (only the supporting horn is shown) opposite to the cutting blade 100, and the tension adjusting rod 102 is supported by the support frame. The nuts 104 and 104 are screwed into the male screw 102a of the tension adjusting rod 102 in a state in which the hole 103a is slidably inserted into the hole 103a. Then, the tension of the cutting blade 100 is adjusted by shifting the nuts 104, 104 in the axial direction of the tension adjusting rod 102. In the figure, reference numeral 105 denotes a metal fitting for fixing the end portion of the cutting blade 100 to the support horn 101.

  In order to apply tension to such a cutting blade, the nuts 104 and 104 are loosened by vibration during operation in order to determine the positions of the nuts 104 and 104 in the axial direction before the apparatus is operated. Sometimes there is a problem of insufficient tension. Therefore, an appropriate tension cannot be applied stably. In this case, the cutting blade 100 is also bent or twisted.

  Further, the method of fixing the both ends of the cutting blade to the respective excitation horns and the support horn in the apparatus shown in Patent Document 1 is performed using the fixing metal fitting 105 as shown in FIG. The fixing metal 105 is inserted into a through-hole 106A in a bolt 106 projecting from the tip of the horn 101, and a chuck body 107 that sandwiches the cutting blade 100 is inserted into the tip of the taper. In addition, the slit rod 108 is formed in the taper hole 109A of the tightening nut 109 screwed to the bolt 106, and the slit nut 108 is shifted in the axial direction of the bolt 106. The slit ridge 108 is reduced by the tapered hole 109A of the tightening nut 109, and the cutting blade 100 is fixed. When the cutting blade 100 is removed for replacement or the like, the tightening nut 109 is turned in the opposite direction to shift the tapered hole 109A, thereby expanding the slit rod 108.

  However, such a fixing method has a problem in that the number of parts is large due to the large number of components, and as a result, vibrations other than the ultrasonic frequency are induced simultaneously with heat generated by friction during operation. This adversely affects the stability of the vibration mode of the cutting blade.

  That is, with such a fixing method, there is almost no problem when the amplitude is as small as about 10 μm. However, when the amplitude is larger than that, heat is generated due to friction between components, and ultrasonic waves are generated due to collision between components. Vibrations other than the frequency are induced, which adversely affects the stability of the vibration mode of the cutting blade.

  Moreover, as a method of fixing the cutting blade to the vibration horn, for example, there is also a method shown in Patent Document 2. FIG. 13 shows the method shown in Patent Document 2, in which the end of a cutting blade (not shown) is inserted into the cutting blade insertion groove 111 at the tip of the vibration horn 110, and the vibration horn 110 is inserted into the vibration horn 110. The cutting blade is fixed by a bolt 112 inserted from a direction orthogonal to the cutting blade insertion groove 111. In addition, a hole through which the bolt 112 is inserted is formed at the end of the cutting blade.

  However, in the case of such a fixing method, the axis of the bolt 112 in the fixed state is orthogonal to the vibration direction of the cutting blade. For this reason, the screw is easy to loosen. In this case, the cutting blade is not stable, and surface friction between the male screw of the bolt 112 and the female screw of the horn 110 due to ultrasonic vibration is not suppressed, and heat is generated. Note that it is desirable that the screw for the ultrasonic tool be parallel to the vibration direction, which is effective for preventing loosening of the male screw and the female screw and preventing heat generation due to surface friction between them.

  Patent Document 3 also shows how to fix the cutting blade to the vibration horn. The fixing method shown in Patent Document 3 is as shown in FIG. 14, and the vibration horn 113 is provided with a tapered inclined surface 114 which is deeper toward the center portion on the tip surface thereof, and the inclined A hole 116 in which an internal thread 115 along the axis of the excitation horn 113 is engraved from the surface 114 is provided, while the internal thread 115 of the excitation horn 113 is engraved separately from the excitation horn 113. The head 117a of the bolt 117 to be screwed into the hole 116 has a surface on the screwing side with the hole 116 in which the female screw 115 is engraved as a tapered inclined surface 118 equivalent to the inclined surface 114, and the head A cutting blade insertion groove 119 along the axis of the vibration horn 113 is provided on the end surface of the vibration horn 113a, and the bolt 117 is inserted into the female screw 1 of the vibration horn 113 with the cutting blade 120 inserted into the cutting blade insertion groove 119. 5, the cutting blade insertion groove 119 of the bolt 117 is narrowed by the cooperation of the inclined surface 114 of the excitation horn 113 and the inclined surface 118 of the bolt 117, and thus the bolt 117. The cutting blade 120 is held by the cutting blade insertion groove 119.

  However, with such a fixing method, the gripping force of the cutting blade 120 due to the clamping of the cutting blade insertion groove 119 of the bolt 117 is weak, and the cutting blade 120 may be displaced or dropped during operation. That is, when the cutting blade 120 is fixed by screwing the bolt 117, contact between the cutting blade insertion groove 119 and the cutting edge (open end) portion of the facing wall starts to contact the cutting blade 120. Therefore, the cutting blade 120 is in contact with a point or a line instead of a surface. For this reason, the gripping force is weak and the above-mentioned problem occurs. As a result, if the cutting blade is a thin strip-like long cutting blade, the tension becomes insufficient, and the cutting blade is bent or twisted.

  In addition, in such a fixing method, the cutting blade 120 is gripped by screwing the bolt 117, so there is a problem in the reproducibility of the position of the cutting blade 120 in the circumferential direction of the horn 113. That is, every time the cutting blade 120 is replaced, the position of the cutting blade 120 in the rotational direction is shifted with respect to the horn 113, and the position of the horn or the object to be cut must be reset again.

JP-A-8-118287 JP 2008-154785 A JP 2010-591 A

  The present invention has been made in view of the above points. In the method of applying vibration to the cutting blade, the cutting blade itself is a resonator, and the cutting blade is opposite to the excitation side in its entire length. The end of the side is either a vibration belly or a node, and if the end is a belly, it is supported by a support horn, and if the end is a node, it is supported by a support block In addition, the cutting blade can be applied with a stable and appropriate tension, and the cutting blade is bent during operation in the manner of fixing the end of the cutting blade to the vibration horn or the support horn. It can be firmly fixed so as not to cause twisting, so that the thickness of the cutting blade can be made thinner than before and stable longitudinal vibration resonance can be maintained. Ultrasonic cutting It is intended to provide a device.

  Thus, the gist of the present invention is that a support plate is provided on the base, and one of the two support plates is fixed to the base and the other support is supported. The plate is movable on a linear guide rail provided along the length of the cutting blade described later on the base and a linear guide block that slides along the linear guide rail. A tension adjusting plate is disposed on the opposite side of the moving-side support plate from the fixed-side support plate via a linear guide block that slides along the linear guard rail. It can be moved by a feed screw mechanism comprising a ball screw provided on a table and a nut member to which the ball screw provided on the tension adjusting plate is screwed. A tension coil spring is interposed between the adjusting plate, the resonator is thin and long in the shape of a strip, and is supported by a vibration horn having one end thereof connected to a converter, The cutting blade is made such that the end on the opposite side to the excitation side is either a vibration antinode or a node in the entire length, and the end opposite to the excitation side of the cutting blade is When it becomes a belly, it is supported by a support horn, while when it becomes a node, it is supported by a support block of a predetermined mass, and the excitation horn is attached to one of the support plates in the opposite position. And holding a support horn or a support block for supporting the end of the cutting blade opposite to the excitation side on the other support plate, and the end of the cutting blade opposite to the excitation side is In the case of stomach, the vibration horn and the support horn A triangle that is deepest at the center of the excitation horn or the support horn at the tip of each excitation horn or when the end opposite to the excitation side of the cutting blade is a node on each tip. Provided with an incision having a shape, and provided with an inclined surface having the same angle as each of the inclined surfaces on each of the flat inclined surfaces of the triangular incision, and being slidable along the inclined surfaces. A pair of sandwiching pieces whose opposing walls are flat surfaces parallel to the axis of the excitation horn or the support horn, along the axial direction of the excitation horn or the support horn drilled in the center thereof, and the triangular notch A head with a hexagonal hole screwed in parallel to the axis of the excitation horn or the support horn on each inclined surface of the triangular horn of the excitation horn or the support horn inserted through a long screw insertion hole in the shallow depth direction of the inclined surface And hold the screw The opposing gap is narrowed by screwing and pressing each of the pair of holding pieces against the inclined surface of the triangular notch with its head, thereby holding the end of the cutting blade between the pair of holding pieces. The ultrasonic cutting apparatus is characterized by being fixed.

  In the above configuration, a booster may be interposed between the vibration horn and the converter.

  The present invention is configured as described above, and in the manner of applying vibration to the cutting blade, the cutting blade itself is a resonator, and the end of the cutting blade opposite to the excitation side vibrates in the entire length. If the end is a belly, it is supported by a support horn, and if the end is a node, it is supported by a support block and further cut. In addition to making it possible to stably apply an appropriate tension to the blade, there is no bending or twisting of the cutting blade during operation in the manner of fixing the end of the cutting blade to the vibration horn or support horn. Thus, it can be fixed firmly. Therefore, the thickness of the cutting blade can be further reduced as compared with the conventional one, and the stable longitudinal vibration resonance can be maintained, so that the cutting efficiency can be further improved.

In addition, when a booster is interposed between the excitation horn and the converter, if the amplitude of the excitation horn alone is insufficient, the amplitude can be amplified to compensate for this, Cutting efficiency is further improved.

It is a perspective view of the ultrasonic cutting device concerning a 1st embodiment of the present invention. It is the same front view. It is the same top view. It is explanatory drawing of the fixing method of the cutting blade to the same excitation horn and a support horn, and is the perspective view of the part of the excitation horn and cutting blade which abbreviate | omitted and showed the cutting blade partially. It is a partial expanded sectional view of the state before clamping of the cutting blade by the same pair of clamping pieces. FIG. 6 is a cross-sectional view taken along line AA in FIG. 5. It is the elements on larger scale of the state which clamped the cutting blade by the same pair of clamping pieces. It is a partial expanded sectional view of the state which clamped the cutting blade by the same pair of clamping pieces. It is a front view of the ultrasonic cutting device concerning a 2nd embodiment of the present invention. It is a perspective view of the ultrasonic cutting device concerning a 3rd embodiment of the present invention. It is explanatory drawing of the method of applying tension to the cutting blade in the ultrasonic cutting apparatus shown in Patent Document 1. It is explanatory drawing of the method of fixing to the horn of the cutting blade in the ultrasonic cutting device shown by patent document 1. FIG. It is explanatory drawing of the method of fixing to the horn of the cutting blade in the ultrasonic cutting device shown by patent document 2. FIG. It is explanatory drawing of the method of fixing to the horn of the cutting blade in the ultrasonic cutting device shown by patent document 3. FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

First, a first embodiment of the present invention will be described.
In the figure, reference numeral 1 denotes an ultrasonic cutting device.

In addition, the ultrasonic cutting apparatus 1 has support plates 3 and 4 opposed to each other on a rectangular base 2, and one of the two support plates 3 and 4 is attached to the base 2. While being fixed, the other support plate 3 includes a linear guide rail 5 provided on the base 2 along the length direction of the cutting blade described later, and a linear guide block 6 that slides along the linear guide rail 5. And a linear guide block 7 that slides along the linear guard rail 5 on the opposite side of the moving side support plate 3 to the fixed side support plate 4 of the linear guide rail 5. The tension adjusting plate 8 is disposed through the ball screw 9 provided on the base 2 and the nut member 10 into which the ball screw 9 provided on the tension adjusting plate 8 is screwed. Feed screw mechanism 1 consisting of And a tension coil spring 12 is interposed between the support plate 3 on the moving side and the tension adjusting plate 8, and the resonator is thin and has a long strip shape, and one end thereof. The cutting blade 13 that is supported by a vibration horn 15 connected to the converter 14 and is used as a vibration side by this is so that the end opposite to the vibration side in the entire length becomes the antinode of vibration. At the same time, the end of the cutting blade 13 opposite to the excitation side is supported by a support horn 16, and the excitation horn 15 is held on one support plate 3 in the opposite support plates 3, 4. At the same time, the support horn 16 is held on the other support plate 4, and the triangular ridges deepest at the center of the excitation horn 15 or the support horn 16 are provided on the front end surfaces of the excitation horn 15 and the support horn 16. shape An incision 17 is provided, and each of the flat inclined surfaces 17A and 17B of the triangular notch 17 is provided with inclined surfaces 18A and 19A having the same angle as the inclined surfaces 17A and 17B, respectively. A pair of sandwiching pieces 18 and 19 whose both opposing walls 18B and 19B are flat surfaces parallel to the axis of the excitation horn 15 or the support horn 16 are provided at the center of these. The excitation horn 15 inserted through the screw insertion holes 20 and 21 that are long along the axial direction of the drilled excitation horn 15 or support horn 16 and in the shallow depth direction of the inclined surfaces 17A and 17B of the triangular notch 17. Alternatively, the screws 22 of the heads 22A, 23A with hexagonal holes screwed in parallel to the axis of the excitation horn 15 or the support horn 16 on the inclined surfaces 17A, 17B of the triangular notch 17 of the support horn 16, 23, the screws 22 and 23 are screwed, and the heads 22A and 23A are used to press the pair of holding pieces 18 and 19 against the inclined surfaces 17A and 17B of the triangular notch 17, respectively. The end of the cutting blade 13 is sandwiched and fixed between the pair of sandwiching pieces 18 and 19. In the other figures, 9A is a rotation handle of the ball screw 9, and 9B is a rotation stopper.

Next, the operation of this embodiment will be described.
In the present embodiment, the cutting blade 13 itself resonates and vibrates greatly due to the ultrasonic vibration applied from the vibration horn 15 as described above, and the vibration antinode on the side opposite to the vibration side of the cutting blade 13 Since this end is also supported by the same support horn 16 as that on the excitation side, the vibration of the cutting blade 13 is not attenuated. Therefore, the cutting blade 13 vibrates with a size sufficient for cutting, and the state of the vibrating portion and the non-vibrating portion is stably maintained, so that the cutting efficiency is improved. Further, one support plate 3 holding the vibration horn 15 on one side moves in the length direction of the cutting blade 13 along the linear guide rail 5, and these are adjusted by the movement of the tension adjusting plate 8 by the feed screw mechanism 11. Since the tension of the cutting blade 13 is appropriately adjusted by adjusting the tension of the coil spring 12 interposed between the tension adjusting plate 8 and one of the support plates 3, a sufficient tension is applied to the cutting blade 13. It is possible to prevent the occurrence of bending or twisting during vibration. Therefore, only the longitudinal vibration necessary for cutting can be generated in the cutting blade 13, and in combination with the above action, the cutting blade 13 can be kept thinner and stable in longitudinal vibration resonance. Is. The tension of the cutting blade 13 is preferably 100N to 1000N, and the cutting blade 13 is configured such that the end of the entire length of the cutting blade 13 on the opposite side to the vibration side becomes a vibration antinode. What is necessary is just to obtain | require the 1/2 wavelength resonance length of the blade by an ultrasonic vibration frequency, and to determine with the integer multiple. For example, when the cutting blade is made of a steel material having an ultrasonic vibration frequency of 20 KHz, the longitudinal vibration 1/2 wavelength resonance length is about 130 mm, which may be an integral multiple of 260 mm and 390 mm.

Further, the method of fixing the both ends of the cutting blade 13 to the vibration horn 15 and the support horn 16 is also as described above, and triangular cuts are formed on the respective front end surfaces of the vibration horn 15 and the support horn 16. 17 and a pair of clamping pieces 18 and 19 that are moved in the contact and separation direction by screwing screws 22 and 23 on the inclined surfaces 17A and 17B of the notch 17, so that the number of components is reduced. In addition, since the screws 22 and 23 are along the axial direction of the vibration horn 15 and the support horn 16, loosening due to vibration of the cutting blade 13 is difficult to occur, and therefore heat is generated due to friction between parts as in the conventional fixing means. Does not occur and does not induce vibrations other than the ultrasonic frequency. In addition, when the pair of clamping pieces 18 and 19 clamps and fixes the cutting blade 13, the opposing walls 18 B and 19 B of the pair of clamping pieces 18 and 19 are parallel to the cutting blade 13 as shown in FIGS. 7 and 8. Since they are in contact with each other, the entire surface comes into contact with the surface, and the gripping force is much increased as compared with the conventional fixing means. Therefore, the gripping of the cutting blade 13 is not loosened by vibration during operation, and the bending and twisting of the cutting blade 13 can be reliably prevented. Further, since the flat opposing walls 18B and 19B of the pair of holding pieces 18 and 19 are always at a constant angle with respect to the circumferential direction of the vibration horn 15 and the support horn 16, the cutting blade 13 is renewed. Even after replacement, it can be set in the same direction as before. Further, when the cutting blade 13 is replaced, a simple operation of simply screwing the screws 22 and 23 is sufficient, so that the replacement work can be performed quickly and efficiently.

  Next, a second embodiment of the present invention shown in FIG. 9 will be described.

  The difference between the present embodiment and the first embodiment is that a booster 24 is interposed between the vibration horn 15 and the converter 14 in the present embodiment.

  By configuring the present embodiment as described above, when the amplitude of the horn alone is insufficient, it is possible to amplify the amplitude and make up for it, and the cutting efficiency is further improved. In addition, since the other structure and effect | action are the same as that of the said 1st Embodiment, the same code | symbol is attached | subjected to the same member and detailed description is abbreviate | omitted.

Next, a third embodiment of the present invention shown in FIG. 10 will be described.

The difference between the present embodiment and the first and second embodiments is that, in the first and second embodiments, the cutting blade has an overall length opposite to the excitation side. In contrast to the fact that the part becomes an antinode of vibration, in this embodiment, it becomes a node of vibration. In this embodiment, the end of the cutting blade is supported by the support block 25 having a predetermined mass.

  The support block 25 is installed at the upper end of the support plate 4, and includes a horizontal support plate 26 and a pair of cutting blade support blocks 27 and 28 that are superposed and fixed to the upper portion of the support plate 26. Thus, the end portion serving as the node of the cutting blade 13 is supported by being sandwiched between the notches 29 and 30 formed on the opposing surfaces of the pair of cutting blade support blocks 27 and 28. Further, a concave portion 31 and a convex portion 32 that fit together are formed in the central portion of the opposing surfaces of the pair of cutting blade support blocks 27 and 28, and the notches 29 and 30 are formed in the concave portion 31 and the convex portion 32. Forming.

  Further, in the case of such an embodiment, the cutting blade 13 is formed such that the end on the opposite side to the excitation side becomes a node of vibration in the entire length, and is basically cut by a 1/4 wavelength (20 KHz steel material). When the blade is manufactured, it is possible to add a longitudinal wavelength of 1/4 wavelength and a resonance length of about 65 mm, and a half wavelength. Specifically, they are 65 mm, 65 mm + 130 mm, 65 mm + 130 mm + 130 mm, and the like. In addition, since the other structure and effect | action are the same as that of the said 1st Embodiment and 2nd Embodiment, the same code | symbol is attached | subjected to the same member and detailed description is abbreviate | omitted.

DESCRIPTION OF SYMBOLS 1 Ultrasonic cutting device 2 Base 3, 4 Support plate 5 Linear guide rail 6, 7 Linear guide block 8 Tension adjustment plate 9 Ball screw 10 Nut member 11 Feed screw mechanism 12 Coil spring 13 Cutting blade 14 Converter 15 Excitation horn 16 Support horn
17 Triangular notches 18, 19 A pair of clamping pieces 22, 23 Screws 24 Booster 25 Support block

Claims (2)

  A support plate is provided opposite to the base, and one of the two support plates is fixed to the base, and the other support plate has a length of a cutting blade described later on the base. A linear guide rail provided along the linear guide block and a linear guide block that slides along the linear guide rail, and the fixed-side support plate of the moving-side support plate in the linear guide rail; A tension adjusting plate is disposed on the opposite side of the linear guide block that slides along the linear guard rail, and the tension adjusting plate is attached to the ball screw provided on the base and the tension adjusting plate. It is possible to move by a feed screw mechanism comprising a nut member into which the ball screw is provided, and a tension coil between the support plate on the moving side and the tension adjusting plate A cutting blade that is thin and has a long and thin band shape, and is supported by a vibration horn connected to the converter at one end of the resonator, thereby forming a vibration side on the entire length. In this case, the end on the opposite side to the excitation side is either a vibration antinode or a node, and if the end opposite to the excitation side of the cutting blade is an antinode, a support horn is used. On the other hand, when it becomes a node, it is supported by a support block having a predetermined mass, and the vibration horn is held on one support plate of the opposing support plate and the other support plate And holding a support horn or a support block that supports an end of the cutting blade opposite to the excitation side, and when the end of the cutting blade opposite to the excitation side becomes an antinode, the excitation The cutting blade is added to the front end of each of the horn and the supporting horn. When the end opposite to the side is a node, a triangular notch that is deepest in the center of the excitation horn or support horn is provided on the tip surface of the excitation horn. Each flat inclined surface is provided with an inclined surface having the same angle as each of the inclined surfaces so that it can slide along the inclined surface, and both opposing walls are parallel to the axis of the excitation horn or the support horn. A pair of sandwiching pieces formed as flat surfaces are formed into screw insertion holes that are long along the axial direction of the excitation horn or support horn drilled in the center of the holding pieces and in the shallow depth direction of the inclined surface of the triangular cut. Hold the screwed horn or support horn with a hexagon socket head screw threaded parallel to the axis of the oscillating horn or support horn on each inclined surface of the triangular notch of the inserted horn or support horn, and screw the screw The pair of clamping pieces at the head Are pressed against the inclined surface of the triangular incision to narrow the opposing gap, and the end of the cutting blade is sandwiched and fixed between the pair of sandwiching pieces. Sonic cutting device. The ultrasonic cutting device according to claim 1, wherein a booster is interposed between the vibration horn and the converter.

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