GB1496137A - Welding plastics workpieces - Google Patents

Welding plastics workpieces

Info

Publication number
GB1496137A
GB1496137A GB2872974A GB2872974A GB1496137A GB 1496137 A GB1496137 A GB 1496137A GB 2872974 A GB2872974 A GB 2872974A GB 2872974 A GB2872974 A GB 2872974A GB 1496137 A GB1496137 A GB 1496137A
Authority
GB
United Kingdom
Prior art keywords
transducer
voltage
workpieces
terminals
working face
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
Application number
GB2872974A
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.)
Kerry Ultrasonics Ltd
Original Assignee
Kerry Ultrasonics 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 Kerry Ultrasonics Ltd filed Critical Kerry Ultrasonics Ltd
Priority to GB2872974A priority Critical patent/GB1496137A/en
Publication of GB1496137A publication Critical patent/GB1496137A/en
Expired 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
    • B29C65/02—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
    • 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
    • B06B1/0246—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal
    • B06B1/0261—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal taken from a transducer or electrode connected to the driving transducer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic 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
    • B29C66/90—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
    • B29C66/9515—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 amplitude
    • 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
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/50—Application to a particular transducer type
    • B06B2201/55—Piezoelectric transducer
    • 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
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/70—Specific application
    • B06B2201/72—Welding, joining, soldering
    • 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
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • 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
    • B29C66/959—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables
    • B29C66/9592—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables in explicit relation to another variable, e.g. X-Y diagrams

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

1496137 Seaming non-metallic sheet material KERRY ULTRASONICS Ltd 25 June 1975 [28 June 1974] 28729/74 Heading B5K In a method of welding plastics workpieces together by the application of ultrasonic vibrational energy by an ultrasonic transducer having a working face 21 which engages one of the workpieces, the amplitude of vibration of the working face 21 is monitored by detector means 22 providing an output signal proportional to this amplitude, the output signal is compared with an experimentally determined reference signal and the application of ultrasonic energy to the workpieces is interrupted when the difference between the output signal and the reference signal attains a pre-selected datum value. As shown in Fig. 1, the ultrasonic transducer comprises a pair of piezoelectric elements 10, 12 sandwiched between metallic bodies 14, 16 and having an operating alternating voltage applied thereto at terminals 13. A tapered horn 18 is secured to the body 16 and has a working face 21. The detector means 22 comprises a strain-sensitive pick-up, e.g. a secondary piezoelectric transducer, cemented to the horn 18 near the point of maximum stress. The output voltage V 1 generated by the transducer 22 when the apparatus is in use is available at terminals 19. A voltage comparator, Fig. 2 (not shown), compares the voltage V 1 with a preset reference voltage V 0 and the output (V 0 -V 1 ) is used to switch a transistor in the circuit of a relay having a pair of contacts connected between the terminals 13 and the power supply therefor. When (V 0 -V 1 ) becomes positive the transistor is rendered non-conducting so as to cause normally open contacts of the relay to open to cut off the power supply to the transducer. A time delay circuit prevents the relay dropping out inadvertently as a result of spurious brief signals. In modifications (not shown), the detector means 22 comprises an accelerometer or a displacement monitor or the ultrasonic transducer itself is included in a motional circuit attached to its terminals and capable of providing an output signal proportional to the transducer motion. The transducer is driven under either constant-current or constant-voltage conditions. It is necessary to calibrate the apparatus to establish the value of the reference signal applicable to any particular welding operation. Preferably, the apparatus is arranged so that power is not supplied to the ultrasonic transducer until the working face 21 is in pressure engagement with the workpieces.
GB2872974A 1975-06-25 1975-06-25 Welding plastics workpieces Expired GB1496137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2872974A GB1496137A (en) 1975-06-25 1975-06-25 Welding plastics workpieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2872974A GB1496137A (en) 1975-06-25 1975-06-25 Welding plastics workpieces

Publications (1)

Publication Number Publication Date
GB1496137A true GB1496137A (en) 1977-12-30

Family

ID=10280169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2872974A Expired GB1496137A (en) 1975-06-25 1975-06-25 Welding plastics workpieces

Country Status (1)

Country Link
GB (1) GB1496137A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2427652A1 (en) * 1978-05-29 1979-12-28 Siemens Ag Control circuit for ultrasonic welding equipment - emits warning signal if amplitude of vibration exceeds preset threshold values
US4341574A (en) * 1980-08-25 1982-07-27 Texas Instruments Incorporated Ultrasonic bond energy monitor
EP0176136A1 (en) * 1984-09-14 1986-04-02 N.V. Verenigde Instrumentenfabrieken ENRAF-NONIUS Apparatus for treating a patient with ultrasound waves and treatment head for such apparatus
EP0190601A1 (en) * 1985-02-04 1986-08-13 Siemens Aktiengesellschaft Safety device for a shock wave discharge tube
WO2005116593A1 (en) * 2004-05-28 2005-12-08 Schunk Ultraschalltechnik Gmbh Method for measuring and/or regulating the oscillation amplitude of an ultrasonic transmitter, and an ultrasonic welding device
EP3438658B1 (en) * 2014-10-07 2021-12-08 Constellium Issoire Measuring equipment for ultrasonic control of a liquid metal

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2427652A1 (en) * 1978-05-29 1979-12-28 Siemens Ag Control circuit for ultrasonic welding equipment - emits warning signal if amplitude of vibration exceeds preset threshold values
US4341574A (en) * 1980-08-25 1982-07-27 Texas Instruments Incorporated Ultrasonic bond energy monitor
EP0176136A1 (en) * 1984-09-14 1986-04-02 N.V. Verenigde Instrumentenfabrieken ENRAF-NONIUS Apparatus for treating a patient with ultrasound waves and treatment head for such apparatus
EP0190601A1 (en) * 1985-02-04 1986-08-13 Siemens Aktiengesellschaft Safety device for a shock wave discharge tube
US4834074A (en) * 1985-02-04 1989-05-30 Siemens Aktiengesellschaft Safety system for a shock wave generator
WO2005116593A1 (en) * 2004-05-28 2005-12-08 Schunk Ultraschalltechnik Gmbh Method for measuring and/or regulating the oscillation amplitude of an ultrasonic transmitter, and an ultrasonic welding device
US7647828B2 (en) 2004-05-28 2010-01-19 Schunk Ultraschalltechnik Gmbh Method for measuring and/or regulating the oscillation amplitude of an ultrasonic transmitter, and an ultrasonic welding device
EP3438658B1 (en) * 2014-10-07 2021-12-08 Constellium Issoire Measuring equipment for ultrasonic control of a liquid metal

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920625