JP6144083B2 - Ultrasonic machining tools - Google Patents

Description

  The present invention relates to an ultrasonic processing tool for processing a workpiece by ultrasonic vibration using an ultrasonic processing apparatus.

  Conventionally, an ultrasonic processing tool (for example, a cutter blade) connected to the vibration generating unit is vibrated ultrasonically by vibrating the vibration generating unit, and the workpiece is processed by applying the ultrasonic vibrating tool to the work. A sonic processing apparatus is used (see, for example, Patent Document 1). FIG. 7 is a perspective view showing a main part of a tool mounting portion 300 and a cutter blade (ultrasonic processing tool) 330 at the tip of this type of ultrasonic processing apparatus. As shown in the figure, a tool clamping slit 301 is provided on the front end surface of the tool mounting portion 300, which is notched in a slit shape in the vertical direction. Then, the cutter blade 330 is attached to the tool attachment portion 300 by inserting the base portion of the cutter blade 330 into the slit 301 and inserting a bolt (not shown) into the hole 303 provided on the side surface of the tool attachment portion 300. After passing through a concave bolt insertion portion 331 provided on the base side, the tip is screwed into a screw hole provided on the opposite surface of the slit 301 and tightened.

JP 2000-326291 A

  By the way, when the workpiece to be cut by the ultrasonic processing apparatus is a hard workpiece, a hard cemented carbide is used as the cutter blade. On the other hand, a light and rigid titanium alloy with little loss with respect to ultrasonic waves is used as the tool mounting portion for holding the cutter blade. However, since neither the titanium alloy nor the cemented carbide has good thermal conductivity, there is a problem that heat is easily trapped in the clamping portion of the cutter blade by the tool mounting portion, resulting in a high temperature. For this reason, for example, when a hard work such as carbon fiber is cut with this cutter blade, the cutter blade or the like is easily damaged by the high heat and force applied to the clamping portion. For this reason, for example, when a carbon fiber workpiece or the like is continuously processed by the cutter blade, there is a risk that the titanium tool mounting portion may crack or the cutter blade may be broken.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an ultrasonic machining tool capable of suppressing heat generation in a clamping portion by a tool mounting portion of an ultrasonic machining apparatus with a simple configuration. .

The invention described in the claims 1, an ultrasonic machining tool is clamped in the tool clamping slit formed in the tool mounting portion of the ultrasonic machining device that generates ultrasonic vibrations, before Symbol ultrasonic machining A heat dissipation metal layer is formed across the surface sandwiched in the tool clamping slit of the tool and the surface projecting outside from the surface sandwiched in the tool clamping slit of the ultrasonic processing tool The heat dissipating metal layer is a metal having a material having a higher thermal conductivity and a lower melting point than that of the metal constituting the ultrasonic processing tool, and the heat dissipating metal layer further dissipates the tool. It is characterized in that it is made of a metal which is not melted by frictional heat when the ultrasonic machining tool is sandwiched in the slit and is vibrated ultrasonically .
Thereby, the heat generated at the portion where the ultrasonic processing tool is sandwiched in the tool clamping slit can be efficiently radiated to the outside by the heat radiating metal layer, and the temperature rise of the clamping portion can be suppressed. As a result, it is possible to prevent cracks from occurring in the tool mounting portion or cracks in the ultrasonic processing tool itself.
In particular, since a part of the metal layer for heat dissipation is exposed to the outside (usually in the air), heat can be efficiently released by the exposed surface, thereby more effectively suppressing heat generation at the sandwiched portion. Can do. Thereby, even if it is a metal layer for heat dissipation with a low melting | fusing point, the said clamping part can be cooled effectively, without fuse | melting.
Conventionally, interposing a metal layer by plating or the like between a hard ultrasonic processing tool that vibrates ultrasonically and a hard tool mounting part has not been considered from the idea that this metal layer may melt. It was. The inventor of the present application has arrived at the present invention by paying attention to the fact that the cooling effect is superior due to better heat conduction even when the temperature of the melting point of the metal layer for heat dissipation is low.
The ultrasonic machining tool is not limited to the cutter blade, and may be other various tools (for example, a diamond file) as long as it is an ultrasonic machining tool for ultrasonically machining a workpiece.

Further, according to the present invention, in addition to the above features, the ultrasonic processing tool is a cutter blade, and the metal layer for heat dissipation is both surfaces of a root side portion of the cutter blade, and the cutter blade is a slit for tool clamping. It is preferable to form from the surface on the base side sandwiched inside to the surface projecting a predetermined dimension from the tip end of the tool clamping slit .

Further, according to the present invention, in addition to the above features, the material for the ultrasonic processing tool is a cemented carbide, the material for the tool mounting portion is a titanium alloy, and the material for the metal layer for heat dissipation is copper. Is preferred. In addition to copper, there are gold, silver, aluminum, nickel, and the like as metals having better thermal conductivity than cemented carbide, and these metals may be used instead of copper. The heat dissipation metal layer may be formed by laminating a plurality of types of metals.

  According to the present invention, with a simple configuration, it is possible to suppress the temperature rise of the sandwiched portion of the ultrasonic machining tool by the tool mounting portion to a low level. As a result, it is possible to effectively prevent cracks from occurring in the tool mounting portion or cracks in the ultrasonic machining tool itself.

It is a side view of the ultrasonic processing apparatus 1 which attached the tool 10 for ultrasonic processing. 2 is an enlarged perspective view of a main part of a tip side portion of the ultrasonic processing apparatus 1. FIG. 2 is an enlarged exploded perspective view of a main part of a tip side portion of the ultrasonic processing apparatus 1. FIG. The state of temperature rise in the vicinity of the cutter blade over time for both the ultrasonic processing apparatus 1 equipped with the cutter blade 10 provided with the heat dissipation plating 15 and the ultrasonic processing apparatus 1 equipped with the conventional cutter blade. It is a figure which shows the measured measurement result. It is a figure which shows the measurement result which measured the state of the temperature rise of the cutter blade vicinity part by the thermography at the time of carrying out idle driving | running | working of the ultrasonic processing apparatus 1 which mounted | wore with the cutter blade 10 which gave the metal plating 15 for heat dissipation. It is a figure which shows the measurement result which measured the state of the temperature rise of the cutter blade vicinity part by thermography at the time of carrying out idle operation of the ultrasonic processing apparatus 1 with which the conventional cutter blade was mounted | worn. It is a principal part perspective view which shows the conventional tool attachment part 300 and the cutter blade 330. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view of an ultrasonic processing apparatus 1 to which an ultrasonic processing tool (hereinafter referred to as “cutter blade”) 10 according to an embodiment of the present invention is attached, and FIG. 2 is a front end side portion of the ultrasonic processing apparatus 1. FIG. 3 is an enlarged perspective view of the main part of the front end side portion of the ultrasonic processing apparatus 1. As shown in these drawings, the ultrasonic processing apparatus 1 includes a substantially cylindrical case 50 that houses a vibration generating unit (not shown) therein, a horn unit 40 that projects outward from one end of the case 50, and a horn unit 40. And a cutter blade 10 attached to the tip of a tool attachment portion 41 provided at the tip of the blade.

  Inside the case 50 is housed a vibration generating unit constituted by a piezoelectric element layer (not shown). One end of the vibration generating unit is connected to the horn unit 40, and the horn unit 40 protrudes from one side surface of the case 50 to the outside. The horn part 40 is made of a titanium alloy. Titanium alloy is a metal that is light, rigid, stretchable, and has little loss against ultrasonic vibration.

  A tool clamping slit 43 is provided on the tip surface of the tool mounting portion 41 in a slit shape in the vertical direction. In the vicinity of the distal end side of the outer peripheral surface of the tool mounting portion 41, a bolt insertion hole 45 penetrating the tool mounting portion 41 is provided perpendicularly to the surface of the slit 43. The inlet portion of the hole 45 on the side where the bolt 30 is inserted is a conical (mortar-shaped) concave portion 47. A female screw for screwing a male screw of the bolt 30 described below is provided on the inner peripheral surface of the hole 45 on the opposite side across the slit 43.

  The cutter blade 10 has a substantially isosceles triangular flat plate shape, and the isosceles portion is a blade 11. A bolt insertion part 13 made of a circular hole is provided at the center of the base side portion of the cutter blade 10. The cutter blade 10 has a thickness that allows the cutter blade 10 to be inserted almost exactly into the slit 43. The cutter blade 10 is made of cemented carbide. A cemented carbide is a sintered body, is hard and has high wear resistance, and is a material suitable for use in a cutting tool or the like. Note that the bolt insertion portion 13 may be formed of a concave portion like the bolt insertion portion 331 shown in FIG. 7 instead of the hole.

  A heat radiating metal layer (hereinafter referred to as “heat radiating plating” in this embodiment) 15 is applied to both surfaces of the base side portion of the cutter blade 10. In this example, the heat dissipation plating 15 is copper plating. The heat radiating plate 15 is formed from the surface on the base side where the cutter blade 10 is clamped in the tool clamping slit 43 to the surface protruding from the tip of the tool clamping slit 43 to the outside by a predetermined dimension. .

  The cutter blade 10 is attached to the tool attachment portion 41 by inserting the base portion of the cutter blade 10 into the slit 43, inserting the bolt 30 into the hole 45 of the tool attachment portion 41, and using the bolt insertion portion 13 of the cutter blade 10. It is carried out by screwing and tightening into a female screw in a hole 45 provided on the opposite surface in the slit 43. At this time, as shown in FIG. 2, a part of the heat radiating plating 15 of the cutter blade 10 is exposed to the outside (in the air) from the tip portion of the slit 43.

  In the ultrasonic machining apparatus 1 configured as described above, if the vibration generating unit in the case 50 is driven to generate ultrasonic vibration, the ultrasonic vibration is transmitted to the horn unit 40 and the ultrasonic wave is generated. The entire processing apparatus 1 is ultrasonically vibrated in the direction of the central axis L, and the workpiece can be processed by the cutter blade 10. Note that the portion of the cutter blade 10 where the heat dissipation plating 15 is exposed is near the base of the cutter blade 10, so that it does not touch the workpiece and does not peel off when the workpiece is processed.

  And when the ultrasonic processing apparatus 1 whole ultrasonically vibrates, the heat | fever by friction generate | occur | produces in the part which the tool attachment part 41 has clamped the cutter blade 10. FIG. This frictional heat increases when the cutter blade 10 is applied to a hard work and becomes higher temperature. When the cutter blade 10 reaches a high temperature, the cemented carbide alloy constituting the cutter blade 10 and the titanium alloy constituting the tool attachment portion 41 are deteriorated by heat, and the cutter blade 10 may be cracked or cracked in the tool attachment portion 41 in some cases. May occur.

  On the other hand, in this ultrasonic processing apparatus 1, since the heat dissipation plating 15 is provided on the cutter blade 10, the frictional heat generated in the portion where the tool mounting portion 41 sandwiches the cutter blade 10 is applied to the heat dissipation plating. 15 and is further radiated efficiently into the air on the exposed surface of the heat radiating plating 15 exposed to the air. For this reason, the frictional heat does not reach the clamping portion, and the temperature rise can be minimized. This can effectively prevent the cemented carbide constituting the cutter blade 10 and the titanium alloy constituting the tool mounting portion 41 from being deteriorated by heat, and prevent the cutter blade 10 from cracking and the tool mounting portion 41 from cracking. it can.

  In addition, since the said heat dissipation plating 15 is soft copper, rather than directly joining a hard cemented carbide alloy and a hard titanium alloy, it has the effect that a soft metal interposes between them and can reduce friction itself and suppress frictional heat. .

  On the other hand, copper and other metals having good thermal conductivity are generally lower in melting point than the material of the cutter blade 10 and the material of the tool mounting portion 41, and may be melted by the frictional heat. In the field of 1, such a metal layer having a low melting point has not been interposed between the cutter blade 10 and the tool mounting portion 41. On the other hand, in the present invention, as described above, a part of the heat dissipating plating 15 is exposed to the air at the base side portion of the cutter blade 10 so that the heat dissipation can be improved. Even if a metal having a low thickness is interposed, it is not melted by frictional heat, and the problem of melting is solved.

  FIG. 4 shows both the ultrasonic processing apparatus 1 equipped with the cutter blade 10 according to the present embodiment to which the heat dissipation plating 15 is applied and the ultrasonic processing apparatus 1 equipped with a conventional cutter blade not applied with the heat dissipation plating 15. FIG. 5 is a diagram showing measurement results obtained by measuring a temperature rise state in the vicinity of the cutter blade over time when the idling operation is performed without cooling with air. FIG. 5 is a graph showing the temperature rise in the vicinity of the cutter blade immediately after the ultrasonic processing apparatus 1 equipped with the cutter blade 10 to which the heat dissipation plating 15 is applied is mounted for 85 seconds. FIG. 6 is a graph showing the temperature rise in the vicinity of the cutter blade immediately after the ultrasonic processing apparatus 1 equipped with the conventional cutter blade without the heat dissipation plating 15 is idled for 30 seconds. It is a figure which shows the measured measurement result.

  As shown in FIG. 4, when the cutter blade 10 with the heat dissipation plating 15 is used, the gradient of temperature rise is gentle over time as compared with the case of using the cutter blade without the heat dissipation plating 15. It was confirmed that the temperature was clearly lowered.

  Further, comparing FIG. 5 with FIG. 6, in the case of the cutter blade 10 to which the heat dissipation plating 15 is applied, there is no portion exceeding 100 ° C. in the cutter blade 10 (about 50 ° C. as a whole), whereas the heat dissipation plating. In the case of the conventional cutter blade which does not give 15, although it is a short time, the part exceeding 100 degreeC has arisen in the cutter blade. From these facts, it was confirmed that the temperature rise of the cutter blade 10 provided with the heat dissipation plating 15 can be effectively suppressed.

  The measurement result is a measurement result when cooling with air is not performed. If cooling with air is performed, the effect of the heat dissipation plating 15 is further amplified.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. Note that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, in the above example, a titanium alloy is used as the material of the tool mounting portion 41, but another material such as aluminum may be used instead. Further, the material of the cutter blade 10 is not limited to the cemented carbide, and other various hard materials may be used.

  Further, the material of the heat dissipation plating 15 is not limited to copper, and gold, silver, aluminum, nickel, or the like may be used, for example. In short, any heat dissipating plating made of a metal having better thermal conductivity than the metal constituting the cutter blade 10 may be used. A plurality of types of metals may be stacked.

  In the above example, plating is used as a method of forming the heat dissipation metal layer. However, the present invention is not limited to plating, and the heat dissipation metal layer may be formed by various other methods such as vapor deposition and electron beam irradiation. .

  In the above example, the cutter blade 10 is used as an ultrasonic processing tool. However, other various ultrasonic processing tools such as a diamond file may be used. In short, any ultrasonic processing tool may be used as long as it is clamped by a tool clamping slit formed in the tool mounting portion.

  If there is another means for releasing heat from the heat radiating metal layer, the heat radiating metal layer may not necessarily be formed on the surface protruding from the tip of the tool clamping slit of the ultrasonic machining tool. For example, a structure in which air is blown onto the heat radiating metal layer in the tool mounting portion, or a structure in which the base portion side of the ultrasonic processing tool is exposed to the outside and heat is radiated in this portion, is used.

1 Ultrasonic processing device 10 Cutter blade (Tool for ultrasonic processing)
11 Blade 13 Bolt insertion part 15 Heat dissipating plating (heat dissipating metal layer)
30 bolt 40 horn part 41 tool attachment part 43 slit (slit for tool clamping)
45 holes (Bolt insertion holes)
50 cases

Claims (3)

An ultrasonic processing tool that is sandwiched in a tool clamping slit formed in a tool mounting portion of an ultrasonic processing device that generates ultrasonic vibrations ,
Said surface to be clamped in the tool clamping the slit before Symbol ultrasonic machining tool, said over from the surface to be clamped in the tool clamping the slit of the ultrasonic machining tool and the surface that protrudes to the outside Forming a metal layer for heat dissipation,
The heat dissipating metal layer is a metal having a material having better thermal conductivity and a lower melting point than the metal constituting the ultrasonic processing tool, and further, the heat dissipating from the heat dissipating metal layer forms the tool clamping slit. An ultrasonic processing tool comprising a metal made of a material that is not melted by frictional heat when the ultrasonic processing tool is sandwiched and ultrasonically vibrated . The ultrasonic processing tool according to claim 1,
The ultrasonic processing tool is a cutter blade,
The heat dissipating metal layer protrudes from the tip side of the tool clamping slit to the outside by a predetermined dimension from both sides of the base side portion of the cutter blade and from the base side surface where the cutter blade is clamped in the tool clamping slit. A tool for ultrasonic machining, characterized by being formed over a surface . The ultrasonic processing tool according to claim 1 or 2 ,
A material for the ultrasonic processing tool is a cemented carbide, a material for the tool mounting portion is a titanium alloy, and a material for the metal layer for heat dissipation is copper.

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