JPS6029361Y2 - Combined structure of vibrating tool and vibrating horn - Google Patents

Description

【考案の詳細な説明】 本考案は超音波捩り振動切削用工具と振動ホーンとの結
合構造に関するものある。[Detailed Description of the Invention] The present invention relates to a coupling structure between an ultrasonic torsional vibration cutting tool and a vibration horn.

先づ捩り振動切削装置の概略を説明すると、第１図に示
すごとく振動子１１は振動ホーン１２に装着されており
カバー１０で保護されている。First, the outline of the torsional vibration cutting device will be explained. As shown in FIG. 1, a vibrator 11 is attached to a vibrating horn 12 and protected by a cover 10.

第１図下部に振巾曲線、応力曲線が画かれてあり、振動
ホーン１２の端面の振巾最大、応力最小の位置で振動工
具１３に結合されており共振系となっている。An amplitude curve and a stress curve are drawn in the lower part of FIG. 1, and the vibrating horn 12 is connected to the vibrating tool 13 at the position of the end face where the amplitude is maximum and the stress is minimum, forming a resonant system.

振動工具１３は振巾最小の点１３ｂ、１３Ｃにフランジ
を設は板１４を介して固定ネジ１６により工具ホルダー
１５に固定されている。The vibrating tool 13 has flanges at points 13b and 13C of minimum oscillating width, and is fixed to the tool holder 15 via a plate 14 with fixing screws 16.

振動工具１３の先端の振巾最大点１３ｄにチップ１８が
取けられ、被削材１７を切削する機構になっている。A tip 18 is installed at the maximum swing width point 13d at the tip of the vibrating tool 13, and is a mechanism for cutting the workpiece 17.

振動子１１は１／２ｔＬ長２０ＫＨｚの振動をするよう
に図には示していないが発振器により駆動されている。The vibrator 11 is driven by an oscillator (not shown in the figure) so as to vibrate with a length of 1/2tL and a frequency of 20 KHz.

振動ホーン１２は１１皺長で共振し且つ振巾を３〜５倍
に増巾する。The vibrating horn 12 resonates with an 11-fold length and increases the amplitude by 3 to 5 times.

振動工具１３は１波長で共振し先端１３ｄの外周部で両
振巾約３０μとなっている。The vibrating tool 13 resonates at one wavelength, and has a width of approximately 30 μ at the outer periphery of the tip 13d.

従来振巾ホーンと振動工具の結合部の機構として、第２
図に示すごとく振動工具１３′の結合部１３′ａにテー
パー軸部を設け、又ホーン１２′の端部１２′ａに前記
テーパー軸に適合したテーパー穴部を設けて此のテーパ
ーを密接させることにより振動の結合伝達を行わせてい
た。Conventionally, as a mechanism for connecting the vibrating width horn and the vibrating tool, the second
As shown in the figure, a tapered shaft portion is provided at the coupling portion 13'a of the vibrating tool 13', and a tapered hole portion that fits the tapered shaft is provided at the end portion 12'a of the horn 12' to bring this taper into close contact. This allows for coupled transmission of vibrations.

上記機構の場合の結合の方法としては図には示していな
いが２つ割り袋ナツト状の専用工具が必要であった。Although not shown in the drawings, the above-mentioned mechanism required a dedicated tool in the form of a nut.

即ち締付は時には袋ナツトの底をフランジ部１３’ｆの
図中左側に掛は袋ナツトのメネジを振動ホーン１３′の
外周のオネジに喰ませて引き込みテーパー結合させる、
又取外し時には同袋ナツトの底をフランジ１３′ｆの図
中右側に掛はネジを逆回転させることにより取外しを行
っていた。That is, when tightening, sometimes the bottom of the cap nut is hung on the left side of the flange portion 13'f in the figure, and the female thread of the cap nut is bitten into the male thread on the outer periphery of the vibrating horn 13', and the cap nut is pulled in and connected in a tapered manner.
In addition, when removing the nut, the bottom of the nut was hooked onto the right side of the flange 13'f in the figure, and the screw was rotated in the opposite direction.

上述の如く、振動工具は一端に設けられた切刃を鋭利に
研磨したり又は使用中での破損時に再研磨するために度
々振動ホーンを振動工具より着脱する事が必要である。As mentioned above, it is necessary to frequently attach and detach the vibrating horn from the vibrating tool in order to sharpen the cutting edge provided at one end of the vibrating tool or to re-sharpen the cutting edge if it breaks during use.

従来の機構の欠点は上記のように複雑な締付け、取外し
操作が必要なこと、複雑な形状の２つ割裂ナット工具を
必要としたこと以外にテーパー結合であるためにテーパ
一部は軸穴共に精度を必要とし加工コストが高価である
こと、又テーパ一部は強力に圧入されるためにテーパー
軸穴部共に損傷が著しいことがあり数回の着脱により特
に高価な振動ホーンの穴が開き使用不能になり非常に不
経済であった。The disadvantages of the conventional mechanism are that, as mentioned above, complicated tightening and removal operations are required, and a complex-shaped bifurcated nut tool is required. Precision is required and machining costs are high, and the taper part is forcefully press-fitted, which can cause significant damage to both the taper shaft hole and the use of an especially expensive vibrating horn that opens up after being attached and detached several times. It became impossible and extremely uneconomical.

尚損傷の著しい原因の１つとして次の理由がある。One of the major causes of damage is as follows.

第１図の振動系の振巾曲線、応力曲線に示す如く振動工
具１３の結合点１３ａは振巾最大、応力最小の点でこの
部分で結合すれば振動エネルギーは充分に伝達出来るし
、又応力が少ないので結合当り面は損傷が少なくなるも
のである。As shown in the amplitude curve and stress curve of the vibration system in Figure 1, the connection point 13a of the vibrating tool 13 is the point where the amplitude is maximum and the stress is minimum, and if the connection is made at this point, the vibration energy can be sufficiently transmitted, and the stress Since there is less damage to the bonding surface, there is less damage.

しかし第２図の従来のテーパー結合方式では当り面が軸
方向に分布しているため応力の多い部分の当り面となり
損傷の原因となっている。However, in the conventional taper coupling method shown in FIG. 2, the abutment surfaces are distributed in the axial direction, so the abutment surfaces are located at areas with high stress, causing damage.

本考案はこれらの欠点を排除し製造コストの安価で耐久
性のある結合構造、即ち振動工具を提供するものである
。The present invention eliminates these drawbacks and provides a durable coupling structure, ie, a vibrating tool, that is inexpensive to manufacture.

本考案の要旨とするところは結合構造として第３図に示
すごとく一端に切刃部１８“を有する振動工具１３″に
捩り振動軸線に対し垂直な面を形成した結合端部１３″
ａにオネジ部１３″ｅを設け、又振動ホーン１２″の結
合端部１２″ａは前記垂直な面を形成した結合端部１３
″ａに密接結合が可能な如く設けられたメネジ１２“ｅ
によってネジ結合され振動伝達を行わしめる構造である
。The gist of the present invention is that, as shown in FIG. 3, the connecting structure includes a vibrating tool 13'' having a cutting edge 18'' at one end, and a connecting end 13'' forming a surface perpendicular to the torsional vibration axis.
A is provided with a male screw portion 13''e, and the connecting end 12''a of the vibration horn 12'' is connected to the connecting end 13 forming the vertical surface.
Female thread 12"e provided to enable close connection to "a"
This structure is screwed together to transmit vibration.

本考案の機構を第１図の振巾曲線、応力曲線で考えると
、振巾最大応力最小点１３ａで平面形状に当り面をとっ
ているため振動エネルギーの伝達は最も効率良く且つ当
り面の損傷はほとんど生じない。Considering the mechanism of the present invention in terms of the amplitude curve and stress curve shown in Figure 1, since the vibration energy is transmitted most efficiently and there is no damage to the contact surface since the amplitude maximum stress minimum point 13a has a contact surface with the planar shape. rarely occurs.

又結合力としてはオネジ、メネジのネジ結合であるため
に非常に強力であり、又平面当りのため圧接力による変
形は全く生じない。Furthermore, the bonding force is very strong because it is a screw connection with male and female screws, and since it is in contact with a flat surface, no deformation occurs due to pressure contact force.

更に加工コストについては通常のタップ加工、ダイス加
工の精度で充分であるためにコストは安価である。Furthermore, the processing cost is low because the precision of normal tap processing and die processing is sufficient.

又、前記テーパー結合方式で必要であった２つ割裂ナツ
ト状の複雑な専用工具は不必要で第３図１３″ｆに示す
２面巾加工を軸部に行ない通常のスパナで締付けが可能
であり締付、取外し操作上も容易である。In addition, the complicated dedicated tool in the form of a bifurcated nut, which was required in the taper connection method, is not required, and the width across flats process shown in Fig. 3, 13''f can be performed on the shaft part, and tightening can be done with a normal spanner. It is also easy to tighten and remove.

以上の事は、思想上では従来のテーパ一方式では振動伝
達の当り面と圧着力を保持する作用とが共に同一のテー
パー面に行わせているものに対して、本考案のネジ結合
方式は振動伝達の当り面である平面と圧着力を保持させ
るネジ部とを別に設けて作用を分離したことにより上記
の効果が生じたものである。The above points are based on the idea that in the conventional taper one-way type, both the contact surface for vibration transmission and the action for holding the pressure force are performed on the same tapered surface, whereas the screw connection method of the present invention The above effect is achieved by separately providing a flat surface that is a contact surface for vibration transmission and a threaded portion that maintains a pressing force to separate their functions.

又、振動工具１３″にメネジを設け、オネジ１３″ｅに
相当する長いオネジを前記振動工具１３″のメネジ及び
振動ホーン１２“のメネジ１２“ｅの両方にネジ結合し
螺着する構造にしても同様の効果が得られる。Further, the vibrating tool 13'' is provided with a female screw, and a long male screw corresponding to the male screw 13''e is screwed to both the female screw of the vibrating tool 13'' and the female screw 12''e of the vibrating horn 12''. A similar effect can be obtained.

尚第３図１３ａ部のフランジはこの場合振動伝達当り面
の面積を調整する機能を持ち必要に応じて広くも狭くも
容易に調整加工が可能である。In this case, the flange shown in FIG. 3, 13a has a function of adjusting the area of the vibration transmission contact surface, and can be easily adjusted to be wider or narrower as required.

【図面の簡単な説明】[Brief explanation of drawings]

第１図ａは捩り振動切削装置の全体図、第１図すは振動
状態を説明するための振巾曲線及び応力曲線図、第２図
は従来のテーパー結合工具及び振動ホーンの先端部を示
す拡大図、第３図は本考案のネジ結合加工具及び振動ホ
ーンの先端部を示す拡大図である。 １３・・・・・・振動工具、１３“ｅ・・・・・・オネ
ジ部、１２・・・・・・振動ホーン。Figure 1a is an overall view of the torsional vibration cutting device, Figure 1 is an amplitude curve and stress curve diagram for explaining the vibration state, and Figure 2 is a diagram showing the tip of a conventional taper-coupled tool and vibrating horn. An enlarged view, FIG. 3 is an enlarged view showing the tip of the threaded joint processing tool and vibration horn of the present invention. 13... Vibration tool, 13"e... Male screw part, 12... Vibration horn.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 発振器、振動子、振動ホーン、および一端に切刃部を有
し他端に振動伝達結合部を形威した振動工具より構成さ
れ、前記発振器からの信号により捩り振動切削を行なう
振動切削装置において、前記振動工具と振動ホーンとの
結合端を振巾最大位置に設定し、前記振動ホーンは前記
振動工具の捩り振動軸線に対し垂直な接合面を形威し、
且つネジ締結により着脱可能としたことを特徴とする振
動切削工具と振動ホーンの結合構造。A vibration cutting device comprising an oscillator, a vibrator, a vibration horn, and a vibration tool having a cutting edge at one end and a vibration transmission coupling portion at the other end, and performing torsional vibration cutting by a signal from the oscillator, a connecting end of the vibrating tool and the vibrating horn is set at a maximum amplitude position, and the vibrating horn forms a joint surface perpendicular to the torsional vibration axis of the vibrating tool;
A combination structure of a vibrating cutting tool and a vibrating horn, characterized in that it can be attached and detached by screw fastening.