JP2008142798A - Tool for shutting off ultrasonic vibration - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly transmit energy of ultrasonic vibration to a component to be shut off from the ultrasonic vibration. <P>SOLUTION: This tool 1 for shutting off ultrasonic vibration is provided with a resonator 2, a vibration conversion part 3, an annular projection 4, a blade 5, a tool fitting part 6, and a screw hole 7. The blade 5 is fixed to either of axial side faces 4a of the annular projection 4 and is formed into a shape having larger diameter than that of the annular projection 4. An axial side face 5a of the blade 5 protrudes onto an outer side in the radial direction from an outer peripheral face of the annular projection 4 or an outer peripheral face of the vibration conversion part 3 at a right angle. An outer peripheral face 5b of the blade 5 crosses the axial side face 5a orthogonally and has a circular shape positioned in the direction for transmitting vibration of the resonator 2 on one circumference, using the center L extended in the direction for transmitting vibration of the resonator 2 as its center. When shutting off the component to be shut off from ultrasonic vibration from the vibration by the tool 1 for shutting off ultrasonic vibration, the outer peripheral face 5b of the blade 5 comes into contact with the whole component to transmit energy of ultrasonic vibration to the component properly. If a chamfered part 5d is formed in a peripheral fringe part of the blade 5, the peripheral fringe part is prevented from being damaged. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an ultrasonic vibration cutting tool in which energy of ultrasonic vibration is appropriately transmitted to a part to be cut.

Among ultrasonic vibration cutting tools, as disclosed in Patent Document 1, a blade formed on a resonator by an electrolytic plating method is known. However, as shown in FIG. 2, the outer peripheral surface 5c of the blade 5 may have an arcuate shape located on a number of circumferences centered on the center extending in the vibration transmission direction of the ultrasonic vibration cutting tool. If the outer peripheral surface 5c of the No. 5 is arcuate, there is a drawback that the energy of ultrasonic vibration is not properly transmitted to the part to be cut.
Japanese Patent No. 3469516

  The problem to be solved by the invention is that the energy of ultrasonic vibration is not properly transmitted to the part to be cut.

  In the ultrasonic vibration cutting tool according to the present invention, an annular protrusion that protrudes radially outward from the outer peripheral surface of the vibration converting portion is provided on the outer peripheral surface of the vibration converting portion provided in the resonator. One circle centered on the center of which the outer peripheral surface of the blade extends in the direction of vibration transmission of the resonator is provided with a blade having a diameter larger than the diameter of the annular protrusion as a main component and diamond grown using the annular protrusion as a seed. The main feature is that it is formed in a circular shape on the circumference over the direction of vibration transmission of the resonator. A chamfered portion may be formed over the entire circumferential direction of the peripheral portion at the peripheral portion where the outer peripheral surface and the axial side surface of the blade intersect.

  The ultrasonic vibration cutting tool according to the present invention is formed in a circular shape that extends over the transmission direction of the resonator vibration on one circumference centered on the center where the outer peripheral surface of the blade extends in the vibration transmission direction of the resonator. Therefore, when cutting a part to be cut with an ultrasonic vibration cutting tool, the outer peripheral surface of the blade comes into contact with the part to be cut and the ultrasonic vibration energy is appropriately transmitted to the part to be cut. There is an advantage that the part to be cut can be appropriately cut. If the chamfered part is formed over the entire circumferential direction of the peripheral part at the peripheral part where the outer peripheral surface and the shaft side surface of the blade intersect, the cutting part is cut with an ultrasonic vibration cutting tool. In this case, there is an advantage that the peripheral edge of the blade can be prevented from being lost.

  FIG. 1a shows an ultrasonic vibration cutting tool 1 according to the best mode for carrying out the invention. In FIG. 1a, the ultrasonic vibration cutting tool 1 includes a resonator 2, a vibration converting portion 3, an annular protrusion 4, a blade 5, a tool fitting portion 6, a screw hole 7, and the like.

  The resonator 2 is made of aluminum which is one of materials having good acoustic characteristics, and has a length of ½ wavelength that resonates with ultrasonic vibration input from one end. At both ends of the resonator 2, there is a maximum vibration amplitude point f1; f3 of the vibration waveform W1 indicating an instantaneous displacement (vibration amplitude) that vibrates in the axial direction indicated by the arrow X, and the vibration waveform is at the center of the resonator 2. There is a minimum vibration amplitude point f2 of W1.

  The vibration conversion unit 3 is made of the same material as that of the resonator 2 and has an annular shape that protrudes coaxially with the resonator 2 outside the outer peripheral surface of the resonator 2 at the position of the minimum vibration amplitude point f2 of the vibration waveform W1. The vibration converter 3 has a diameter larger than that of the resonator 2 and a width equally distributed on both sides in the axial direction around the minimum vibration amplitude point f2, and a diameter indicated by an arrow Y from the axial direction of the vibration transmission direction. Convert to direction. The instantaneous displacement (vibration amplitude) of the ultrasonic vibration in which the vibration transmission direction is converted into the radial direction is a vibration waveform W2. The maximum vibration amplitude point f4; f5 in the vibration waveform W2 exists on the outer peripheral side of the vibration converting unit 3.

  The annular protrusion 4 is made of the same material as that of the resonator 2 and has an annular shape that protrudes coaxially with the resonator 2 outside the outer peripheral surface of the vibration converting portion 3. The outer diameter of the annular protrusion 4 is smaller than the outer diameter of the blade 5. The axial side surface 4 a of the annular protrusion 4 protrudes from the outer peripheral surface of the annular protrusion 4 at a right angle outward in the radial direction.

  The blade 5 is fixed to one of the axial side surfaces 4 a of the annular protrusion 4 and formed into a shape having a larger diameter than the annular protrusion 4 by electrolytic plating. The shaft side surface 5 a of the blade 5 protrudes perpendicularly outward in the radial direction from the outer peripheral surface of the annular protrusion 4 or the outer peripheral surface of the vibration converting portion 3. The outer peripheral surface 5b of the blade 5 is a circular shape that is positioned over one circumference centered on a center L that is orthogonal to the shaft side surface 5a and that extends in the vibration transmission direction of the resonator 2 over the vibration transmission direction of the resonator 2. is there. That is, when the ultrasonic vibration cutting tool 1 is viewed from the front as shown in FIG. 1, the outer peripheral surface 5 b of the blade 5 shows a flat straight line parallel to the center L of the resonator 2. When 1 is viewed from the side indicated by the arrow A shown in FIG. 1, a circular shape is located over the circumference of the center L extending in the vibration transmission direction of the resonator 2 over the vibration transmission direction of the resonator 2. Indicates.

  The outer peripheral surface 5b of the blade 5 vibrates in the radial direction indicated by the arrow Y with the vibration transmitted from the vibration converting portion 3 via the annular protrusion 4. The vibration of the outer peripheral surface 5 b of the blade 5 in the radial direction indicated by the arrow Y is determined by the amount of protrusion from the vibration converting portion 3. If the diameter of the blade 5 is too larger than the diameter of the vibration converting portion 3, the outer peripheral surface 5 b of the blade 5 will also vibrate in the direction of arrow X, so the diameter of the blade 5 is based on the diameter of the vibration converting portion 3. Is determined within a range that vibrates only in the arrow Y direction. The tool fitting portion 6 is provided on the outer peripheral surface of the resonator 2 at a position where it does not interfere with the vibration converting portion 3. The screw hole 7 is formed inside the center of both end faces of the resonator 2.

  According to the ultrasonic vibration cutting tool 1 of the best mode, the outer peripheral surface 5b of the blade 5 has the vibration of the resonator 2 on one circumference centered on the center L extending in the vibration transmission direction of the resonator 2. Since the part to be cut is cut with the ultrasonic vibration cutting tool 1, the outer peripheral surface 5 b of the blade 5 comes into contact with the part to be cut as a whole and the ultrasonic vibration is generated. Energy is appropriately transmitted to the part to be cut, and there is an advantage that the part to be cut can be cut appropriately.

  As shown in FIG. 1b, a chamfered portion 5d is formed by an arc surface or an inclined surface over the entire circumferential direction of the peripheral portion at the peripheral portion where the outer peripheral surface 5b and the shaft side surface 5a of the blade 5 intersect. If formed, it is possible to prevent the peripheral portion of the blade 5 from being damaged during the process of cutting the part to be cut with the ultrasonic vibration cutting tool 1 and to cut the part to be cut more appropriately.

a figure is a front view (best form) which fractured | ruptured a part of ultrasonic vibration cutting tool, and b figure is sectional drawing (different form) of the peripheral part of a braid | blade. Sectional drawing of the shape of the outer peripheral surface of a braid | blade (conventional).

Explanation of symbols

  1 is an ultrasonic vibration cutting tool, 2 is a resonator, 3 is a vibration converting unit, 4 is an annular protrusion, 4a is an axial side surface of the annular protrusion 4, 5 is a blade, 5a is an axial side surface of the blade 5, 5b; The outer peripheral surface 5d of the blade 5 is a chamfered portion of the blade 5.

Claims (2)

  The outer peripheral surface of the vibration converting portion provided in the resonator is provided with an annular protrusion protruding outward from the outer peripheral surface in the radial direction of the vibration converting portion, and the annular protrusion is mainly composed of diamond grown using the annular protrusion as a seed. In addition, a blade having a diameter larger than the diameter of the annular protrusion is provided, and the outer peripheral surface of the blade is formed in a circular shape located on one circumference centered on the center extending in the vibration transmission direction of the resonator. Features ultrasonic vibration cutting tool.   The ultrasonic vibration cutting tool according to claim 1, wherein a chamfered portion is formed over the entire circumferential direction of the peripheral portion at a peripheral portion where the outer peripheral surface and the axial side surface of the blade intersect.

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