JP2004050796A - Ultrasonic engraving pen - Google Patents

Ultrasonic engraving pen Download PDF

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Publication number
JP2004050796A
JP2004050796A JP2002215284A JP2002215284A JP2004050796A JP 2004050796 A JP2004050796 A JP 2004050796A JP 2002215284 A JP2002215284 A JP 2002215284A JP 2002215284 A JP2002215284 A JP 2002215284A JP 2004050796 A JP2004050796 A JP 2004050796A
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JP
Japan
Prior art keywords
ultrasonic
engraving
pen
tip
vibration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002215284A
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Japanese (ja)
Inventor
Toshiyuki Sugawara
菅原 稔幸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokin Corp
Original Assignee
NEC Tokin Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Tokin Corp filed Critical NEC Tokin Corp
Priority to JP2002215284A priority Critical patent/JP2004050796A/en
Publication of JP2004050796A publication Critical patent/JP2004050796A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultrasonic engraving pen which dispenses with a great pressuring force in engraving, and hardly deteriorates the engraving performance even in a long-time use, regardless of the electric conductivity of an object to be engraved. <P>SOLUTION: This ultrasonic engraving pen, in which a piezoelectric vibration complex, which is composed of a single piezoelectric vibrator 104 or a combination of the vibrator 104 and a displacement enlarging cone 101, is driven almost at a resonance frequency, so that the engraving can be applied onto the surface of a hard object, is characterized in that the area of a vibrating tip part is set at 1 mm<SP>2</SP>or less, and the ultrasonic engraving pen is provided with a vibrating tip part where diamond powder is electrodeposited or a vibrating tip part where carbon steel is quenched. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、金属等の堅牢物表面に、文字やマーキングを形成する刻印ペンに関し、特に超音波振動を利用して刻印を施す超音波刻印ペンに関するものである。
【0002】
【従来の技術】
従来、この種の堅牢物表面に文字やマーキングを刻印する装置としては、モーターを高速回転させて回転軸に連結した先端回転部分で被刻印物表面を研削し刻印する電動モータペンや、高電圧の放電現象を利用し金属表面を溶融させ刻印する電気ペンなどが一般的である。
【0003】
これらの装置において、電動モータペンは短時間で深い刻印を行う為には先端部を被刻印物表面に強力に圧接する加圧力が必要である。また、電気ペンは、ペン先端部と被刻印物の距離の変化によって、放電が不安定になり、明瞭な刻印が得られないという問題点や被刻印物が金属の導電性物質に限定される。
【0004】
圧電振動子単体での超音波振動を利用した堅牢物表面への刻印については、振動先端部分の磨耗量が大きく、長時間、同一の刻印能力を保持することが困難である。
【0005】
また、圧電振動子の超音波振動を利用して刻印を行う場合、振動先端部の振動振幅は5ミクロンから25ミクロン程度必要である。圧電振動子単体で前記振動振幅量を得ることが困難である場合は、通常コーンと呼ばれる変位量拡大治具と圧電振動子を組み合わせた圧電振動複合体として、振動先端部の振動振幅を拡大する方法が用いられる。この際、前記コーンの材料としては、弾性係数の大きなステンレス、或いはチタン合金、鉄系の材料等が通常用いられている。
【0006】
しかしながら、前述のコーン用材料は、被刻印物の硬さより十分大きな硬さを有する材料でなければ、コーン自体の磨耗が大きくなり、長時間の使用に耐えられない。
【0007】
【発明が解決しようとする課題】
そこで、本発明は、前述の問題点を解決するためになされたもので、刻印時、大きな加圧力を必要とせず、被刻印物の電気伝導性に関係無く、長時間の使用に際しても刻印性能の劣化の少ない超音波刻印ペンを提供することを目的とする。
【0008】
【課題を解決するための手段】
本発明によれば、圧電振動子単体或いは圧電振動子と変位量拡大コーンを組み合わせた圧電振動複合体を共振周波数近傍で駆動し堅牢物表面に刻印する超音波刻印ペンにおいて、振動先端部の面積が1mm以下であることを特徴とする超音波刻印ペンが得られる。
【0009】
また、本発明によれば、炭素鋼に焼き入れを行った振動先端部や、ダイヤモンド粉末の電着を施した振動先端部を有する超音波刻印ペンが得られる。
【0010】
振動先端部の面積が1mmより大きくなると、刻印やマーキングの線の太さが1.2mmより太くなり、精細な文字やマーキングを表示できなくなるので、振動先端部の面積は1mm以下の必要がある。
【0011】
【発明の実施の形態】
以下、本発明の実施の形態を、図面をもとに説明する。
【0012】
図1は、本発明の一実施の形態の超音波刻印ペンの側面図を示す。図1中、各部位は次のように構成してある。101は振動振幅拡大用のコーン部である。103は振動部で、2個の圧電振動子104を金属ブロック106と107で締結したボルト締めランジュバン型振動子を用いている。102は圧電振動子104に電気入力を与える電気端子である。105はフランジ状突起で、本発明の超音波刻印ペンの長さ振動の節の部分に当たり超音波刻印ペンを固定する役割を有する。
【0013】
本実施の形態では、前記振動部103はボルト締めランジュバン型振動子を用いたが、フェライト系振動子及び圧電素子単体等で振動部を構成することも可能である。また、前記ボルト締めランジュバン型振動子の金属ブロック106と107は機械的品質係数が高く、発熱が少なく、振動振幅を容易に取り出すが可能であるジュラルミン材を使用した。
【0014】
前述の本実施の形態における振動部は、直径が15mm、長さが38mmで共振周波数は63kHzである。同様にコーン部は振幅を拡大させる為、断面がステップ形状で、大断面部直径は15mmで小断面直径は6mmの形状寸法で、約6倍の振動振幅拡大機能を有している。このコーンの材質としては、ニッケルクロム系鋼材のSNC材を使用した。
【0015】
図2は、図1のコーン先端部の拡大図を示す。この先端部には、ダイヤモンド粉末を電着し、ダイヤモンド粉末層の厚みは、およそ100ミクロンである。また、振動先端部の直径dは0.30mmである。被刻印物が酸化アルミニウム板やステンレス板の場合、ダイヤモンド粉末との硬度差からコーン先端部は磨耗しにくい構造となる。
【0016】
図3は、本実施の形態における超音波刻印ペンを駆動する回路ブロック図である。本回路では、負荷による振動系の共振周波数の変化及びインピーダンスの変化を電流計測ブロックで計測し、発振回路の周波数並びにアンプゲインにフィードバックし、負荷変動に対して、一定の電流が供給されるようにしている。これにより、振動先端部に負荷となる被刻印物が接触した際、振幅を一定に保つことで振動先端に駆動力が発生し、この駆動力により被刻印物の表面を研削加工することが可能で、回転モータのような特別に強力な加圧力は必要無い。
【0017】
図4には、本発明の超音波刻印ペンの駆動状態のモデル図を示した。本発明の超音波刻印ペンでは、回転モータのような特別に強力な加圧力は必要無いが、被刻印物の表面を研削加工できることは、反作用として、超音波刻印ペンの振動先端部も僅かずつ研磨され、負荷をかけている時間とともに、振動先端部の面の直径が少しずつ変化する。
【0018】
図5には、図4の状態で被刻印物として酸化アルミニウム板を使用し、振動先端部の振動振幅を13ミクロンとした場合で、負荷をかけている時間と振動先端面の直径dの大きさの変化の測定結果を示した。実線Aが本実施の形態を示す。比較例として、コーン材質にステンレスを使用した超音波刻印ペンの測定結果も実線Bとして同時に示した。
【0019】
図5によれば、振動先端部をダイヤモンド粉末電着品とした場合、従来のステンレスと比較すると、連続100時間後の振動部先端の直径が本実施の形態では0.315mm、比較例が0.385mmで、振動先端部の直径dの変化が五分の一以上小さく、磨耗が軽減されている事が分かる。
【0020】
以上、本発明の一実施の形態としてダイヤモンド粉末を電着した振動先端部を有する超音波刻印ペンについて説明したが、コーン材質に炭素鋼の焼き入れ品を用いた場合についても、振動先端部の硬度を大きくすることが可能であり、ダイヤモンド粉末の電着品と同様の効化が得られることは明らかである。
【0021】
【発明の効果】
以上説明したように、本発明によれば、被刻印物の電気伝導性に関係無く、特別の加圧力も必要無く、振動先端部の寸法を長時間一定に保つことが可能となり、高寿命の超音波刻印ペンが提供できる。
【図面の簡単な説明】
【図1】本発明の一実施の形態の超音波刻印ペンの側面図。
【図2】図1のコーン先端部の拡大図。
【図3】超音波刻印ペンを駆動する回路ブロック図。
【図4】本発明の超音波刻印ペンの駆動状態のモデル図。
【図5】振動先端面の直径dの大きさの変化の測定結果示す図。
【符号の説明】
101  コーン部
102  電気端子
103  振動部
104  圧電振動子
105  フランジ状突起
106,107  金属ブロック
201  ダイヤモンド粉末電着層
202  コーン部
203  振動先端部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a marking pen for forming characters and markings on the surface of a rigid object such as a metal, and more particularly to an ultrasonic marking pen for performing marking using ultrasonic vibration.
[0002]
[Prior art]
Conventionally, as a device for imprinting characters or markings on the surface of this kind of solid object, an electric motor pen that grinds and engraves the surface of the object to be engraved at the tip rotating part connected to the rotating shaft by rotating the motor at high speed, or a high voltage An electric pen or the like that uses a discharge phenomenon to melt and imprint a metal surface is generally used.
[0003]
In these devices, the electric motor pen requires a pressing force for strongly pressing its tip against the surface of the object to be engraved in order to perform deep engraving in a short time. Also, the electric pen has a problem that the discharge becomes unstable due to a change in the distance between the pen tip and the object to be engraved, and a clear engraving cannot be obtained, and the object to be engraved is limited to a metal conductive material. .
[0004]
With respect to marking on the surface of a rigid object using ultrasonic vibration of the piezoelectric vibrator alone, the amount of wear at the tip of the vibration is large, and it is difficult to maintain the same marking ability for a long time.
[0005]
In the case where the engraving is performed using the ultrasonic vibration of the piezoelectric vibrator, the vibration amplitude at the tip of the vibration needs to be about 5 to 25 microns. If it is difficult to obtain the vibration amplitude with a piezoelectric vibrator alone, the vibration amplitude at the tip of the vibration is enlarged as a piezoelectric vibration composite that combines a piezoelectric vibrator with a displacement expansion jig usually called a cone. A method is used. At this time, as the material of the cone, stainless steel having a large elastic coefficient, a titanium alloy, an iron-based material, or the like is generally used.
[0006]
However, if the cone material described above is not a material having a hardness sufficiently larger than the hardness of the object to be stamped, the cone itself will be greatly worn and cannot be used for a long time.
[0007]
[Problems to be solved by the invention]
Therefore, the present invention has been made to solve the above-described problems, and does not require a large pressing force at the time of engraving, and has a high stamping performance even when used for a long time regardless of the electric conductivity of the object to be engraved. It is an object of the present invention to provide an ultrasonic engraving pen with less deterioration of the pen.
[0008]
[Means for Solving the Problems]
According to the present invention, in an ultrasonic engraving pen for energizing a piezoelectric vibrator alone or a piezoelectric vibrating composite combining a piezoelectric vibrator and a displacement enlarging cone near a resonance frequency and engraving the surface of a rigid object, Is 1 mm 2 or less.
[0009]
Further, according to the present invention, an ultrasonic marking pen having a vibrating tip portion quenched in carbon steel or a vibrating tip portion electrodeposited with diamond powder can be obtained.
[0010]
If the area of the vibrating tip is larger than 1 mm 2 , the thickness of the engraving or marking line becomes thicker than 1.2 mm, and fine characters and markings cannot be displayed. Therefore, the area of the vibrating tip must be 1 mm 2 or less. There is.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 shows a side view of an ultrasonic marking pen according to an embodiment of the present invention. In FIG. 1, each part is configured as follows. Reference numeral 101 denotes a cone for expanding the vibration amplitude. A vibration unit 103 uses a bolted Langevin type vibrator in which two piezoelectric vibrators 104 are fastened by metal blocks 106 and 107. Reference numeral 102 denotes an electric terminal that supplies an electric input to the piezoelectric vibrator 104. Numeral 105 denotes a flange-like projection which has a role of fixing the ultrasonic imprinting pen at the node of the length vibration of the ultrasonic imprinting pen of the present invention.
[0013]
In this embodiment, the vibrating part 103 uses a bolted Langevin type vibrator, but the vibrating part may be composed of a ferrite vibrator, a single piezoelectric element, or the like. The metal blocks 106 and 107 of the bolted Langevin type vibrator are made of a duralumin material which has a high mechanical quality factor, generates little heat, and can easily take out the vibration amplitude.
[0014]
The vibrating section in the above-described embodiment has a diameter of 15 mm, a length of 38 mm, and a resonance frequency of 63 kHz. Similarly, in order to increase the amplitude of the cone portion, the cross section has a step shape, the large cross section has a diameter of 15 mm and the small cross section has a diameter of 6 mm, and has a function of increasing the vibration amplitude about six times. As the material of the cone, a nickel-chromium-based steel SNC material was used.
[0015]
FIG. 2 shows an enlarged view of the cone tip of FIG. The tip is electrodeposited with diamond powder, and the thickness of the diamond powder layer is about 100 microns. The diameter d of the tip of the vibration is 0.30 mm. When the object to be engraved is an aluminum oxide plate or a stainless steel plate, the tip of the cone has a structure that is hardly worn due to a difference in hardness from diamond powder.
[0016]
FIG. 3 is a circuit block diagram for driving the ultrasonic marking pen according to the present embodiment. In this circuit, the change of the resonance frequency and the change of the impedance of the vibration system due to the load are measured by the current measurement block, and the change is fed back to the frequency of the oscillation circuit and the amplifier gain so that a constant current is supplied with respect to the load fluctuation. I have to. With this, when the object to be engraved, which is a load, comes into contact with the tip of the vibration, a driving force is generated at the end of the vibration by keeping the amplitude constant, and the surface of the object to be engraved can be ground by this driving force. Therefore, there is no need for a specially strong pressing force as in a rotary motor.
[0017]
FIG. 4 shows a model diagram of a driving state of the ultrasonic engraving pen of the present invention. Although the ultrasonic engraving pen of the present invention does not require a specially strong pressing force as in a rotary motor, the ability to grind the surface of the object to be engraved is a counteract, and the vibrating tip of the ultrasonic engraving pen is also slightly small. The diameter of the surface of the vibrating tip gradually changes over time as it is polished and loaded.
[0018]
FIG. 5 shows the case where an aluminum oxide plate is used as the object to be engraved in the state of FIG. 4 and the vibration amplitude of the vibration tip is 13 μm. The measurement results of the change in height are shown. A solid line A indicates the present embodiment. As a comparative example, the measurement result of an ultrasonic engraving pen using stainless steel as the cone material is also shown as a solid line B at the same time.
[0019]
According to FIG. 5, when the tip of the vibrating part is a diamond powder electrodeposited product, the diameter of the tip of the vibrating part after continuous 100 hours is 0.315 mm in the present embodiment and 0 in the comparative example, compared to the conventional stainless steel. At .385 mm, the change in the diameter d of the vibrating tip was smaller than one-fifth or more, indicating that wear was reduced.
[0020]
As described above, as one embodiment of the present invention, the ultrasonic engraving pen having the vibrating tip portion electrodeposited with the diamond powder has been described, but also in the case where a hardened product of carbon steel is used for the cone material, It is apparent that the hardness can be increased, and the same effect as that of the electrodeposited diamond powder can be obtained.
[0021]
【The invention's effect】
As described above, according to the present invention, it is possible to keep the size of the vibration tip portion constant for a long time regardless of the electrical conductivity of the object to be engraved, without the need for a special pressing force, and to achieve a long life. Ultrasonic engraving pens can be provided.
[Brief description of the drawings]
FIG. 1 is a side view of an ultrasonic marking pen according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a cone tip of FIG.
FIG. 3 is a circuit block diagram for driving an ultrasonic marking pen.
FIG. 4 is a model diagram of a driving state of the ultrasonic engraving pen of the present invention.
FIG. 5 is a diagram showing a measurement result of a change in a size of a diameter d of a vibration tip surface.
[Explanation of symbols]
101 Cone section 102 Electric terminal 103 Vibration section 104 Piezoelectric vibrator 105 Flange-like projection 106, 107 Metal block 201 Diamond powder electrodeposited layer 202 Cone section 203 Vibration tip

Claims (3)

圧電振動子単体或いは圧電振動子と変位量拡大コーンを組み合わせた圧電振動複合体を共振周波数近傍で駆動し堅牢物表面に刻印する超音波刻印ペンにおいて、振動先端部の面積が1mm以下であることを特徴とする超音波刻印ペン。An ultrasonic engraving pen for energizing a piezoelectric vibrator alone or a piezoelectric vibrating composite combining a piezoelectric vibrator and a displacement-enlarging cone near a resonance frequency and engraving the surface of a rigid object has an area of a vibration tip portion of 1 mm 2 or less. An ultrasonic engraving pen characterized in that: 請求項1記載の超音波刻印ペンにおいて、炭素鋼に焼き入れを行った振動先端部を有することを特徴とする超音波刻印ペン。2. The ultrasonic engraving pen according to claim 1, further comprising a vibrating tip hardened in carbon steel. 請求項1または2記載の超音波刻印ペンにおいて、ダイヤモンド粉末の電着を施した振動先端部を有することを特徴とする超音波刻印ペン。3. The ultrasonic engraving pen according to claim 1, further comprising a vibrating tip portion on which diamond powder is electrodeposited.
JP2002215284A 2002-07-24 2002-07-24 Ultrasonic engraving pen Pending JP2004050796A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7439654B2 (en) 2004-02-24 2008-10-21 Air Products And Chemicals, Inc. Transmission of ultrasonic energy into pressurized fluids
CN105897038A (en) * 2016-06-06 2016-08-24 哈尔滨工业大学 Ultrasonic wiredrawing vibrator capable of implementing orthogonal composite vibration by single driver
CN114312114A (en) * 2021-12-31 2022-04-12 辽宁科技大学 Jade carving integral type electronic engraving device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7439654B2 (en) 2004-02-24 2008-10-21 Air Products And Chemicals, Inc. Transmission of ultrasonic energy into pressurized fluids
CN105897038A (en) * 2016-06-06 2016-08-24 哈尔滨工业大学 Ultrasonic wiredrawing vibrator capable of implementing orthogonal composite vibration by single driver
CN114312114A (en) * 2021-12-31 2022-04-12 辽宁科技大学 Jade carving integral type electronic engraving device
CN114312114B (en) * 2021-12-31 2023-12-01 辽宁科技大学 Jade carving integral type electron engraving device

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