JPH0427017B2 - - Google Patents

Info

Publication number
JPH0427017B2
JPH0427017B2 JP57199484A JP19948482A JPH0427017B2 JP H0427017 B2 JPH0427017 B2 JP H0427017B2 JP 57199484 A JP57199484 A JP 57199484A JP 19948482 A JP19948482 A JP 19948482A JP H0427017 B2 JPH0427017 B2 JP H0427017B2
Authority
JP
Japan
Prior art keywords
ultrasonic
frequency
signal
voltage
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.)
Expired - Lifetime
Application number
JP57199484A
Other languages
Japanese (ja)
Other versions
JPS5989117A (en
Inventor
Satoru Yoshimura
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.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
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 Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP57199484A priority Critical patent/JPS5989117A/en
Publication of JPS5989117A publication Critical patent/JPS5989117A/en
Publication of JPH0427017B2 publication Critical patent/JPH0427017B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/60—Riveting or staking
    • B29C65/606—Riveting or staking the rivets being integral with one of the parts to be joined, i.e. staking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/0207—Driving circuits
    • B06B1/0223—Driving circuits for generating signals continuous in time
    • B06B1/0238—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B29C65/7805—Positioning the parts to be joined, e.g. aligning, indexing or centring the parts to be joined comprising positioning features
    • B29C65/7814—Positioning the parts to be joined, e.g. aligning, indexing or centring the parts to be joined comprising positioning features in the form of inter-cooperating positioning features, e.g. tenons and mortises
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/847—Drilling standard machine type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9261—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools
    • B29C66/92651—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by using stops
    • B29C66/92653—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by using stops said stops being adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/951—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools
    • B29C66/9511—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools by measuring their vibration frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/951—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools
    • B29C66/9512—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools by controlling their vibration frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/472—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces

Description

【発明の詳細な説明】 技術分野 この発明は超音波エネルギーによつて被加工物
に加工を施す超音波加工機に関し、特にはその超
音波加工機に設けられた超音波振動子の発振周波
数が所望の周波数で発振されているか否かを検出
する振動周波数検出装置を備えた超音波加工機に
関する。[Detailed Description of the Invention] Technical Field The present invention relates to an ultrasonic processing machine that processes a workpiece using ultrasonic energy, and particularly relates to an ultrasonic processing machine that processes a workpiece using ultrasonic energy. The present invention relates to an ultrasonic processing machine equipped with a vibration frequency detection device that detects whether oscillation is being performed at a desired frequency.

従来技術 従来の超音波加工機においては、被加工物の形
状、材質等の異なる作業内容に応じて最適な加工
用ホーンに交換し得るように構成されており、そ
の加工用ホーンが交換された時、その加工用ホー
ンのスプリアス特性が基本周波数と接近した周波
数においてピーク値を有する場合には、超音波振
動素子が基本周波数以外の異なる周波数にて振動
されることがあり、所望の材料に最適な超音波加
工を施すことができなくなるという問題点があつ
た。Conventional technology Conventional ultrasonic machining machines are configured so that they can be replaced with the most suitable machining horn depending on the work content, such as the shape and material of the workpiece. If the spurious characteristics of the processing horn have a peak value at a frequency close to the fundamental frequency, the ultrasonic vibrating element may be vibrated at a different frequency than the fundamental frequency, which is optimal for the desired material. There was a problem that it became impossible to perform ultrasonic processing.

目 的 この発明の目的は、上記問題点を解決するため
に為されたもので、超音波振動素子の振動周波数
が予め定められた一定の基本周波数の範囲内の値
に収まらなくなつた時に警報信号を発生して作業
者に知らせ、被加工物に不良品が発生することが
ないようにした超音波加工機を提供することにあ
る。Purpose The purpose of this invention was to solve the above problems, and provides an alarm when the vibration frequency of the ultrasonic vibration element no longer falls within a predetermined constant fundamental frequency range. To provide an ultrasonic processing machine which generates a signal to notify a worker and prevents the production of defective workpieces.

実施例 以下この発明を具体化した一実施例を図面に従
つて説明する。Embodiment An embodiment embodying the present invention will be described below with reference to the drawings.

第１図に示すように、テーブル１上には支柱２
が立設され、その支柱２の上部には固定台３が固
定されている。その固定台３には流体圧シリンダ
４が固定され、その下方に延びるピストンロツド
５には可動枠体６が固定されており、その可動枠
体６には超音波振動素子７が保持されている。そ
の超音波振動素子７の下端には加工用ホーン８が
着脱可能に取り付けられ、その下端の加工面８ａ
は前記テーブル１と対向している。又、超音波振
動素子７を発振させる発振回路９が設けられてい
る。 As shown in Figure 1, there are two pillars on the table 1.
is erected, and a fixed base 3 is fixed to the upper part of the support column 2. A fluid pressure cylinder 4 is fixed to the fixed base 3, a movable frame 6 is fixed to a piston rod 5 extending below the fixed base 3, and an ultrasonic vibration element 7 is held in the movable frame 6. A machining horn 8 is removably attached to the lower end of the ultrasonic vibration element 7, and a machining surface 8a at the lower end
is opposite to the table 1. Further, an oscillation circuit 9 for causing the ultrasonic vibration element 7 to oscillate is provided.

そしてテーブル１上に型１０を載置し、その型
１０内にプラスチツクからなる２枚の被加工物１
１を重合して載置して、流体圧シリンダ４のピス
トンロツド５を下動させると、可動枠体６ととも
に加工用ホーン８が下動され、その加工面８ａが
被加工物１１の加工部１１ａを押圧する。その状
態で発振回路９により超音波振動素子７を振動さ
せ被加工物１１に加工面８ａから超音波振動を付
与すると両被加工物１１の加工部１１ａが溶着加
工される。加工終了後は流体圧シリンダ４により
加工用ホーン８が上動され、被加工物１１がテー
ブル１上から取り除かれる。 Then, a mold 10 is placed on the table 1, and two workpieces 1 made of plastic are placed inside the mold 10.
When the piston rod 5 of the fluid pressure cylinder 4 is moved down, the machining horn 8 is moved down together with the movable frame 6, and the machining surface 8a is aligned with the machining part 11a of the workpiece 11. Press. In this state, when the ultrasonic vibration element 7 is vibrated by the oscillation circuit 9 and ultrasonic vibration is applied to the workpiece 11 from the workpiece surface 8a, the workpieces 11a of both workpieces 11 are welded. After the machining is completed, the machining horn 8 is moved upward by the fluid pressure cylinder 4, and the workpiece 11 is removed from the table 1.

次にこの実施例の超音波加工機の電子回路を第
２図に従つて説明する。超音波振動素子７は給電
用端子７ａと検出用端子７ｂとを備えており、発
振回路９により発振される。その発振回路９につ
いて説明すると、検出用端子７ｂからは超音波振
動素子７の実際の振動周波数ｆの電気的な高周波
信号SG１が出力され、その高周波信号SG１は帰
還回路１２に入力される。その帰還回路１２は、
一端が超音波振動素子７の検出用端子７ｂに接続
され、他端が抵抗１３を介して接地されたコンデ
ンサ１４と、その抵抗１３と、その抵抗１３に一
次側端子が並列接続されたトランス１５とからな
り、トランス１５の二次側端子は帰還回路１２の
出力端子となつている。帰還回路１２の出力端子
から出力されるフイードバツク信号SG２は減衰
器１６に入力される。その減衰器１６は、３個の
抵抗Ｒ１，Ｒ２，Ｒ３を直列接続してなり、トラ
ンス１５の二次側端子に並列接続されている。抵
抗Ｒ２の両端にはアナログスイツチ１７が並列接
続され、抵抗Ｒ１とＲ２との接続点から減衰器１
６の出力信号SG３が出力される。その出力信号
SG３は可変増幅度増幅回路１８と電力増幅回路
１９とからなる電力供給回路２０に入力され、そ
の電力供給回路２０から高周波電力が超音波振動
素子７の給電用端子７ａに供給される。 Next, the electronic circuit of the ultrasonic processing machine of this embodiment will be explained with reference to FIG. The ultrasonic vibration element 7 includes a power supply terminal 7a and a detection terminal 7b, and is oscillated by an oscillation circuit 9. To explain the oscillation circuit 9, an electrical high-frequency signal SG1 having an actual vibration frequency f of the ultrasonic vibration element 7 is output from the detection terminal 7b, and the high-frequency signal SG1 is input to the feedback circuit 12. The feedback circuit 12 is
A capacitor 14 whose one end is connected to the detection terminal 7b of the ultrasonic vibration element 7 and whose other end is grounded via a resistor 13, the resistor 13, and a transformer 15 whose primary terminal is connected in parallel to the resistor 13. The secondary terminal of the transformer 15 serves as the output terminal of the feedback circuit 12. A feedback signal SG2 output from the output terminal of the feedback circuit 12 is input to an attenuator 16. The attenuator 16 is formed by connecting three resistors R1, R2, and R3 in series, and is connected in parallel to the secondary terminal of the transformer 15. An analog switch 17 is connected in parallel to both ends of the resistor R2, and an attenuator 1 is connected from the connection point of the resistors R1 and R2.
6 output signal SG3 is output. its output signal
The SG3 is input to a power supply circuit 20 consisting of a variable amplification amplifier circuit 18 and a power amplifier circuit 19, and high frequency power is supplied from the power supply circuit 20 to the power supply terminal 7a of the ultrasonic transducer element 7.

この発振回路９は、電圧増幅率をＡ・０、電圧帰
還率をβ・とすればＡ・０・β・＝１なる条件を満足す
るとき発振する。 This oscillation circuit 9 oscillates when the condition A.0.β.=1 is satisfied, where the voltage amplification factor is A.0 and the voltage feedback factor is β.

超音波振動素子７の検出用端子７ｂからの高周
波信号SG１は検波整流回路２１へ入力され、そ
の検波整流回路２１は高周波信号SG１の電圧値
に比例する直流電圧VDを可変直流電源２２に付
与する。その可変直流電源２２には電源電圧VC
が付与されており、直流電圧VDにより制御され
る出力電圧VOを可変増幅度増幅回路１８に付与
する。その出力電圧VOは、直流電圧VDが高く
なるほど低い値となり、直流電圧VDが低下する
ほど高くなる。前記可変増幅度増幅回路１８の増
幅率はその出力電圧VOに比例する。従つて、超
音波振動素子７の振動周波数ｆが低下すると高周
波信号SG１の電圧値が低くなり、直流電圧VDが
低下し出力電圧VOが高くなる。これにより可変
増幅度増幅回路１８の増幅率が高くなり、超音波
振動素子７の給電用端子７ａには大きな高周波電
力が供給される。従つて超音波振動素子７は結果
的に一定の振動数にて振動することになり、高周
波信号SG１の電圧値も一定となる。又、反対に
超音波振動素子７の振動周波数ｆが高くなつた時
も、同様に制御されて結果的に超音波振動素子７
は一定の振動周波数ｆにて振動され、高周波信号
SG１の電圧も一定となる。 The high frequency signal SG1 from the detection terminal 7b of the ultrasonic vibration element 7 is input to the detection rectifier circuit 21, and the detection rectifier circuit 21 applies a DC voltage VD proportional to the voltage value of the high frequency signal SG1 to the variable DC power supply 22. . The variable DC power supply 22 has a power supply voltage VC.
is applied, and an output voltage VO controlled by the DC voltage VD is applied to the variable amplification amplifier circuit 18. The output voltage VO becomes lower as the DC voltage VD increases, and becomes higher as the DC voltage VD decreases. The amplification factor of the variable amplification amplifier circuit 18 is proportional to its output voltage VO. Therefore, when the vibration frequency f of the ultrasonic vibration element 7 decreases, the voltage value of the high frequency signal SG1 decreases, the DC voltage VD decreases, and the output voltage VO increases. As a result, the amplification factor of the variable amplification amplification circuit 18 is increased, and large high-frequency power is supplied to the power feeding terminal 7a of the ultrasonic vibration element 7. Therefore, the ultrasonic vibration element 7 vibrates at a constant frequency, and the voltage value of the high frequency signal SG1 also becomes constant. Conversely, when the vibration frequency f of the ultrasonic vibrating element 7 becomes high, the same control is performed and as a result, the ultrasonic vibrating element 7
is vibrated at a constant vibration frequency f, and a high-frequency signal
The voltage of SG1 also becomes constant.

しかしながら、超音波振動素子７の実際の振動
周波数ｆは基本周波数ｆ０以外の周波数を含む。
この基本周波数ｆ０以外の周波数としては、高調
波、発振回路９の浮遊容量等に起因する寄生振動
によるもの等が存在するが、超音波振動素子７の
周波数に対するいわゆるスプリアス特性が基本周
波数ｆ０に接近した周波数でピーク値を有する
と、超音波振動素子７の実際の振動周波数ｆは基
本周波数ｆ０から外れてしまうこととなる。この
ような状態となると、前述したような検波整流回
路２１、可変直流電源２２、可変増幅度増幅回路
１８によつては、もはや超音波振動素子７の振動
周波数ｆを一定に保つことができなくなつてしま
う。 However, the actual vibration frequency f of the ultrasonic vibration element 7 includes frequencies other than the fundamental frequency f0.
Frequencies other than the fundamental frequency f0 include harmonics, parasitic vibrations caused by stray capacitance of the oscillation circuit 9, etc., but so-called spurious characteristics with respect to the frequency of the ultrasonic transducer element 7 approach the fundamental frequency f0. If the peak value is at this frequency, the actual vibration frequency f of the ultrasonic vibration element 7 will deviate from the fundamental frequency f0. In such a state, the detection rectifier circuit 21, the variable DC power supply 22, and the variable amplification amplifier circuit 18 described above are no longer able to maintain the vibration frequency f of the ultrasonic transducer 7 constant. I get used to it.

そこでこの発明においては発振回路９に以下に
述べるような回路構成を設けている。帰還回路１
２の抵抗１３とコンデンサ１４との接続点からは
超音波振動素子７の振動周波数ｆの電気信号が出
力されている。その振動周波数ｆは周波数−電圧
変換器からなる周波数検出装置２３に入力され、
その周波数検出装置２３は振動周波数ｆに比例す
る直流電圧Vfを判別手段２４に付与する。その
判別手段２４は、超音波振動素子７の基本周波数
ｆ０より僅かに高い周波数ｆ０＋△ｆに比例する
直流電圧VHと、基本周波数ｆ０より僅かに低い
周波数ｆ０−△ｆに比例する直流電圧VLとを出
力する基準電圧発生器２５と、直流電圧Vfと直
流電圧VHとが２個の入力端子にそれぞれ入力さ
れる比較器２６と、直流電圧Vfと直流電圧VLと
が２個の入力端子にそれぞれ入力される比較器２
７と、両比較器２６，２７の出力端子が２個の入
力端子にそれぞれ接続されたOR回路２８とから
なる。比較器２６は直流電圧Vfが直流電圧VHよ
り高くなつた時、すなわち超音波振動素子７の振
動周波数ｆが基本周波数ｆ０より△ｆだけ高くな
つた時、論理１の出力信号を出力し、比較器２７
は直流電圧Vfが直流電圧VLより低くなつた時、
すなわち超音波振動素子７の振動周波数ｆが基本
周波数ｆ０より△ｆだけ低くなつた時、論理１の
出力信号を出力するようになつており、OR回路
２８は、両比較器２６，２７の出力のいずれか一
方又は両方が論理１となつた時、論理１の判別信
号SG４を出力する。その判別信号SG４は、スイ
ツチ２９を介して、警報表示手段３０又はアナロ
グスイツチ駆動回路３１に入力される。その警報
表示手段３０は、警報信号を発生する発光ダイオ
ード、スピーカー等の警報素子３２と、その警報
素子３２を駆動する警報表示素子駆動回路３３と
からなる。超音波振動素子７の実際の周波数ｆが
ｆ０±△ｆの範囲内の値に収まつていない場合に
は、判別手段２４から論理１の判別信号SG４が
警報表示素子駆動回路３３に付与されて、警報素
子３２から光、音等の警報信号が発生される。 Therefore, in the present invention, the oscillation circuit 9 is provided with a circuit configuration as described below. Feedback circuit 1
An electric signal having a vibration frequency f of the ultrasonic vibration element 7 is output from the connection point between the resistor 13 and the capacitor 14 in FIG. The vibration frequency f is input to a frequency detection device 23 consisting of a frequency-voltage converter,
The frequency detection device 23 applies a DC voltage Vf proportional to the vibration frequency f to the discrimination means 24. The determining means 24 uses a DC voltage VH proportional to a frequency f0+Δf slightly higher than the fundamental frequency f0 of the ultrasonic vibration element 7, and a DC voltage VL proportional to a frequency f0−Δf slightly lower than the fundamental frequency f0 . a reference voltage generator 25 that outputs a voltage of Comparator 2 input to each terminal
7, and an OR circuit 28 in which the output terminals of both comparators 26 and 27 are connected to two input terminals, respectively. The comparator 26 outputs a logic 1 output signal when the DC voltage Vf becomes higher than the DC voltage VH , that is, when the vibration frequency f of the ultrasonic vibration element 7 becomes higher than the fundamental frequency f0 by Δf, Comparator 27
is when the DC voltage Vf becomes lower than the DC voltage VL ,
In other words, when the vibration frequency f of the ultrasonic vibration element 7 becomes lower than the fundamental frequency f0 by Δf, an output signal of logic 1 is output, and the OR circuit 28 outputs a logic 1 output signal. When one or both of them becomes logic 1, a logic 1 discrimination signal SG4 is output. The discrimination signal SG4 is inputted to the alarm display means 30 or the analog switch drive circuit 31 via the switch 29. The alarm display means 30 includes an alarm element 32 such as a light emitting diode or a speaker that generates an alarm signal, and an alarm display element drive circuit 33 that drives the alarm element 32. If the actual frequency f of the ultrasonic vibration element 7 is not within the range of f0±△f, a discrimination signal SG4 of logic 1 is applied from the discrimination means 24 to the alarm display element drive circuit 33. , an alarm signal such as light or sound is generated from the alarm element 32.

又、スイツチ２９がアナログスイツチ駆動回路
３１側へ倒されている時には、判別手段２４から
論理１の判別信号SG４が出力されるとアナログ
スイツチ駆動回路３１が作動し、そのアナログス
イツチ駆動回路３１は前記減衰器１６のアナログ
スイツチ１７をオンさせる。減衰器１６の減衰率
は、アナログスイツチ１７がオフされているとき
にはR1／（R1＋R2＋R3）であるが、アナログ
スイツチ１７がオンされた時にはR1／（R1＋
R3）となる。従つて、アナログスイツチ１７が
オンされた時のほうが減衰器１６の減衰率は大き
くなり、発振回路９の全体の電圧利得は低下す
る。それにより超音波振動素子７は、例え基本周
波数ｆ０に接近した周波数でスプリアス特性のピ
ーク値を有する場合でも通常そのピーク値は基本
周波数ｆ０のピーク値よりも低いため、基本周波
数ｆ０以外の周波数では発振し難くなり、基本周
波数ｆ０で発振するようになる。すると、周波数
検出装置２３から出力される直流電圧Vfは、基
準電圧発生器２５から出力される直流電圧VL〜
VHの値の範囲内に収まり、判別手段２４からは
論理０の信号が出力される。従つてアナログスイ
ツチ駆動回路３１は作動せず、アナログスイツチ
１７がオフされる。すると、発振回路９の全体の
電圧利得は元の値に戻つて、そのまま基本周波数
ｆ０にて超音波振動素子７が振動されることとな
る。 Further, when the switch 29 is turned to the analog switch drive circuit 31 side, when the discrimination signal SG4 of logic 1 is output from the discrimination means 24, the analog switch drive circuit 31 is activated, and the analog switch drive circuit 31 operates as described above. Turn on the analog switch 17 of the attenuator 16. The attenuation rate of the attenuator 16 is R1/(R1+R2+R3) when the analog switch 17 is off, but R1/(R1+R3) when the analog switch 17 is on.
R3). Therefore, when the analog switch 17 is turned on, the attenuation factor of the attenuator 16 becomes larger, and the overall voltage gain of the oscillation circuit 9 decreases. As a result, even if the ultrasonic transducer element 7 has a peak value of spurious characteristics at a frequency close to the fundamental frequency f0, the peak value is usually lower than the peak value of the fundamental frequency f0. It becomes difficult to oscillate and oscillates at the fundamental frequency f0. Then, the DC voltage Vf output from the frequency detection device 23 becomes the DC voltage V L ~ output from the reference voltage generator 25.
The value falls within the range of the value of VH , and the determining means 24 outputs a logic 0 signal. Therefore, the analog switch drive circuit 31 does not operate, and the analog switch 17 is turned off. Then, the overall voltage gain of the oscillation circuit 9 returns to its original value, and the ultrasonic transducer element 7 continues to vibrate at the fundamental frequency f0.

前述した検波整流回路２１、可変直流電源２２
等からなる回路は、超音波振動素子７の基本周波
数ｆ０の値が何らかの原因によりずれた場合にそ
の基本周波数ｆ０の値を一定に保つための回路で
ある。これに対して周波数検出装置２３、判別手
段２４、警報表示手段３０、アナログスイツチ駆
動回路３１、アナログスイツチ１７、減衰器１６
等により構成される回路は、超音波振動素子７が
基本周波数ｆ０以外の高調波成分等による周波数
によつて発振されるのを防止する回路でありその
目的が異なる。 The aforementioned detection rectifier circuit 21 and variable DC power supply 22
The circuit consisting of the above is a circuit for keeping the value of the fundamental frequency f0 constant when the value of the fundamental frequency f0 of the ultrasonic transducer element 7 deviates for some reason. On the other hand, the frequency detection device 23, the discrimination means 24, the alarm display means 30, the analog switch drive circuit 31, the analog switch 17, the attenuator 16
The circuit constituted by the above circuits is a circuit that prevents the ultrasonic transducer element 7 from being oscillated by frequencies caused by harmonic components other than the fundamental frequency f0, and its purpose is different.

なお、周波数検出装置２３としては、振動周波
数ｆの高周波信号SG１をその周波数ｆのパルス
信号に変換するシユミツト回路で構成し、その周
波数ｆもしくは周期を直接計測することにより判
別信号SG４を出力するように判別手段２４を構
成してもよい。 The frequency detection device 23 is constructed of a Schmitt circuit that converts a high frequency signal SG1 having a vibration frequency f into a pulse signal having a frequency f, and outputs a discrimination signal SG4 by directly measuring the frequency f or period. The determining means 24 may be configured as follows.

効 果 以上詳述したようにこの発明は、超音波振動素
子７の実際の振動周波数ｆに比例する電気的信号
Vfを検出する振動周波数検出装置２３と、その
振動周波数検出装置２３によつて検出された電気
的信号Vfが予め定められた範囲内の値VL〜VHに
収まるか否かを判別する判別手段２４とその判別
手段２４の判別結果が前記予め定められた範囲内
の値VL〜VHに収まらない時にその判別結果に応
答して警報信号を発生する警報表示手段３０とを
設けたことにより、加工用ホーン８の交換時にお
いて基本周波数ｆ０以外の周波数にて加工用ホー
ン８が振動された場合、警報信号を発生して故障
を知らせるため、作業者はその警報信号により作
業停止することができ、被加工物の加工不良等の
発生を防止することができる。Effects As detailed above, the present invention provides an electric signal proportional to the actual vibration frequency f of the ultrasonic vibration element 7.
A vibration frequency detection device 23 that detects Vf, and a determination that determines whether the electrical signal Vf detected by the vibration frequency detection device 23 falls within a predetermined range of values V L to V H. A means 24 and an alarm display means 30 for generating an alarm signal in response to the discrimination result when the discrimination result of the discrimination means 24 does not fall within the predetermined range of values V L to V H are provided. Therefore, if the machining horn 8 is vibrated at a frequency other than the fundamental frequency f0 when replacing the machining horn 8, an alarm signal will be generated to notify the operator of a malfunction, and the operator will be required to stop work due to the alarm signal. This makes it possible to prevent the occurrence of processing defects on the workpiece.

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

図面はこの発明を具体化した一実施例を示し、
第１図は側面図、第２図は回路図である。 超音波振動素子……７、加工用ホーン……８、
加工面……８ａ、発振回路……９、被加工物……
１１、帰還回路……１２、減衰器……１６、アナ
ログスイツチ……１７、電力供給回路……２０、
周波数検出装置……２３、判別手段……２４、警
報表示手段……３０、アナログスイツチ駆動回路
……３１、振動周波数……ｆ、基本周波数……ｆ
０、直流電圧……Vf、直流電圧……VH、直流電
圧……VL、判別信号……SG４。 The drawings show an embodiment embodying the invention,
FIG. 1 is a side view, and FIG. 2 is a circuit diagram. Ultrasonic vibration element...7, Processing horn...8,
Machining surface...8a, Oscillation circuit...9, Workpiece...
11, Feedback circuit...12, Attenuator...16, Analog switch...17, Power supply circuit...20,
Frequency detection device...23, Discrimination means...24, Alarm display means...30, Analog switch drive circuit...31, Vibration frequency...f, Fundamental frequency...f
0, DC voltage...Vf, DC voltage... VH , DC voltage... VL , discrimination signal...SG4.

Claims (1)

【特許請求の範囲】 １ 加工用ホーン８に超音波振動を付与するため
にその加工用ホーン８に連結された超音波振動素
子７と、 その超音波振動素子７を発振させる発振回路９
と、 を備え、前記加工用ホーン８に超音波振動を付与
することによつて被加工物１１を加工する超音波
加工機において、 前記超音波振動素子７の実際の振動周波数ｆに
比例する電気的信号Vfを検出する振動周波数検
出装置２３と、 その振動周波数検出装置２３によつて検出され
た電気的信号Vfが予め定められた範囲内の値VL
〜VHに収まるか否かを判別する判別手段２４と、 その判別手段２４の判別結果が前記予め定めら
れた範囲内の値VL〜VHに収まらない時にその判
別結果に応答して警報信号を発生する警報表示手
段３０と を設けたことを特徴とする超音波加工機。 ２ 前記超音波振動素子７は往復動可能な可動枠
体６に保持されており、前記加工用ホーン８はそ
の超音波振動素子７に着脱可能に取り付けられて
いることを特徴とする特許請求の範囲第１項に記
載の超音波加工機。 ３ 前記超音波振動素子７は給電用端子７ａと検
出用端子７ｂとを備えており、前記振動周波数検
出装置２３はその検出用端子７ｂから出力された
周波数信号ｆを電圧信号Vfに変換する周波数−
電圧変換器を含むことを特徴とする特許請求の範
囲第１項または第２項に記載の超音波加工機。[Claims] 1. An ultrasonic vibrating element 7 connected to the machining horn 8 in order to apply ultrasonic vibration to the machining horn 8, and an oscillation circuit 9 that oscillates the ultrasonic vibrating element 7.
In an ultrasonic processing machine that processes a workpiece 11 by applying ultrasonic vibration to the processing horn 8, an electric current proportional to the actual vibration frequency f of the ultrasonic vibration element 7 is provided. a vibration frequency detection device 23 that detects an electric signal Vf, and an electric signal Vf detected by the vibration frequency detection device 23, which has a value V L within a predetermined range.
A determining means 24 for determining whether or not the value falls within the range V L to V H ; and an alarm in response to the determination result when the determination result of the determining means 24 does not fall within the value V L to V H within the predetermined range. An ultrasonic processing machine characterized by being provided with an alarm display means 30 for generating a signal. 2. The ultrasonic vibration element 7 is held by a movable frame body 6 that can reciprocate, and the processing horn 8 is detachably attached to the ultrasonic vibration element 7. The ultrasonic processing machine according to scope 1. 3 The ultrasonic vibration element 7 includes a power supply terminal 7a and a detection terminal 7b, and the vibration frequency detection device 23 converts the frequency signal f output from the detection terminal 7b into a voltage signal Vf. −
The ultrasonic processing machine according to claim 1 or 2, characterized in that it includes a voltage converter.
JP57199484A 1982-11-13 1982-11-13 Ultrasonic machining machine with oscillation frequency detector Granted JPS5989117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57199484A JPS5989117A (en) 1982-11-13 1982-11-13 Ultrasonic machining machine with oscillation frequency detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57199484A JPS5989117A (en) 1982-11-13 1982-11-13 Ultrasonic machining machine with oscillation frequency detector

Publications (2)

Publication Number Publication Date
JPS5989117A JPS5989117A (en) 1984-05-23
JPH0427017B2 true JPH0427017B2 (en) 1992-05-08

Family

ID=16408568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57199484A Granted JPS5989117A (en) 1982-11-13 1982-11-13 Ultrasonic machining machine with oscillation frequency detector

Country Status (1)

Country Link
JP (1) JPS5989117A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001367A1 (en) * 1990-01-18 1991-09-19 Branson Ultraschall DEVICE FOR SETTING A MACHINE PARAMETER IN FRICTION WELDING
WO2006074116A1 (en) * 2005-01-03 2006-07-13 3M Innovative Properties Company An elastic laminate material, and method of making
CN102431167A (en) * 2011-11-30 2012-05-02 芜湖杰诺瑞汽车电器系统有限公司 Clamping tool for fan welding
CN113295418B (en) * 2021-05-25 2022-03-22 株洲科盟车辆配件有限责任公司 Intelligent vibration monitoring system for railway wagon bearing

Also Published As

Publication number Publication date
JPS5989117A (en) 1984-05-23

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