DD154343A1 - PROCESS FOR LIMITING THE WELDING ENGINE TRANSMITTED TO THE WORKPIECE IN ULTRASOUND LUBRICANTS - Google Patents

PROCESS FOR LIMITING THE WELDING ENGINE TRANSMITTED TO THE WORKPIECE IN ULTRASOUND LUBRICANTS Download PDF

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Publication number
DD154343A1
DD154343A1 DD80226399A DD22639980A DD154343A1 DD 154343 A1 DD154343 A1 DD 154343A1 DD 80226399 A DD80226399 A DD 80226399A DD 22639980 A DD22639980 A DD 22639980A DD 154343 A1 DD154343 A1 DD 154343A1
Authority
DD
German Democratic Republic
Prior art keywords
energy
ultrasound
welding
limiting
workpiece
Prior art date
Application number
DD80226399A
Other languages
German (de)
Inventor
Wolfgang Klimes
Juergen Punzel
Original Assignee
Wolfgang Klimes
Juergen Punzel
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 Wolfgang Klimes, Juergen Punzel filed Critical Wolfgang Klimes
Priority to DD80226399A priority Critical patent/DD154343A1/en
Priority to DE19813138520 priority patent/DE3138520A1/en
Publication of DD154343A1 publication Critical patent/DD154343A1/en

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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
    • 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
    • B29C66/942—Measuring or controlling the joining process by measuring or controlling the time by measuring 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics

Abstract

Verfahren zur Begrenzung der auf das Werkstueck uebertragenen Schweissenergie beim Ultraschallplastfuegen mit dem Ziel, beim Fuegen von Plastformteilen nur ein definiertes Volumen in der Schweisszone aufzuschmelzen und anschliessend die weitere Energiezufuhr ueber das Schwingwerkzeug zu unterbrechen. Eine elektronische Schaltung bildet dazu eine der vom Ultraschallwandler abgegebenen mechanischen Energie proportionale Groesse. Uebersteigt diese einen Grenzwert,so wird die Energiezufuhr zum Wandler unterbrochen und der Schweissprozess beendet. Die elektrische Leerlaufleistung des Ultraschallwandlers wird bei der Bildung der energieproportionalen Groesse nicht erfasst.Method for limiting the welding energy transferred to the work piece in the case of ultrasonic plating with the aim of melting only a defined volume in the welding zone when joining plastic moldings and then interrupting the further supply of energy via the oscillating tool. An electronic circuit forms one of the mechanical energy emitted by the ultrasonic transducer proportional size. If this exceeds a limit value, the energy supply to the converter is interrupted and the welding process is terminated. The electric no-load power of the ultrasonic transducer is not detected in the formation of the energy proportional size.

Description

-vf--vf-

a) Titel de* Erfindunga) Title of the invention

Verfahren zur Begrenzung dei1 auf das Werkstück übertragenen Schweißenergie beim UltraschallplastfügenA method for limiting dei 1 to the workpiece transmitted ultrasonic welding energy during joining Plast

b) Anwendungsgebiet dor Erfindungb) Field of application of the invention

Geräte zum Fügen von Formteilen, bei denen die Fügeenergie mittels Ultraschall übertragen wird.Apparatus for joining molded parts, in which the joining energy is transmitted by means of ultrasound.

c) Charakteristik der bekannten technischen Lösungc) Characteristic of the known technical solution

Beim Fügen mit Ultraschall wird über ein Schwingwerkzeug (Sonotrode) die für den Fügeprozeß notwendige Energie auf das Werkstück übertragen. Die vom Fügeteil aufgenommeneWhen joining with ultrasound, the energy required for the joining process is transferred to the workpiece via a vibrating tool (sonotrode). The part taken by the joining part

Ultraschalleistung wird von den gerätetechnischen Parametern Andruckkraft, Schwingungsamplitude und Frequenz der Sonotrode bestimmt.Ultrasonic power is determined by the equipment parameters pressure force, oscillation amplitude and frequency of the sonotrode.

Für eine optimale Qualität des Fügeprozesses in einer Serienfertigung, insbesondere beim Schweißen von Plastformteilen, ist es notwendig, ein definiertes Volumen des Formteiles (Schweißfeder, Energierichtungsgeber) aufzuschmelzen und anschließend die weitere Energiezufuhr über das Schwingwerkzeug zu unterbrechen· Kann diese Forderung nicht er füllt werden, so erreicht die Verbindung nicht die geforderte Festigkeit, oder überschüssig aufgeschmolzenes Plastmaterial tritt aus der Verbindungszone aus und führt zu fehlerhaften Formteilen.For optimum quality of the joining process in a series production, in particular when welding plastic moldings, it is necessary to melt a defined volume of the molded part (welding spring, energy directors) and then to interrupt the further supply of energy via the vibrating tool. If this requirement can not be met, Thus, the compound does not reach the required strength, or excess molten plastic material exits the connection zone and leads to defective moldings.

Moderne Ultraschallfügeanlagen sind daher mit einer Pro grammsteuerung ausgerüstet, mit der die Einwirkungszeit des Ultraschalls auf das Werkstück über eine einstellbare Schweißzeit begrenzt werden kann.Modern Ultraschallfügeanlagen are therefore equipped with a program control program, with which the exposure time of the ultrasound can be limited to the workpiece over an adjustable welding time.

Diese Programmsteuerung mit vorgegebener Schweißzeit sichert nur dann für ^eden Arbeitstakt die gleiche Füge energie, wenn sowohl die leistungsbestimmenden Parameter der Anlage (Andruckkraft, Schwingungsamplitude und Fre quenz der Sonotrode), als auch die elastischen Eigenschaften des Fügeteiles bei jedem Takt in gleicher Weise von der Zeit abhängen.This program control with predefined welding time ensures the same joining energy for every working cycle only if both the performance-determining parameters of the system (pressure force, oscillation amplitude and frequency of the sonotrode) and the elastic properties of the joining part at each cycle are the same Depend on time.

Schwankungen der angeführten Geräteparameter und Toleranzen der Fügeteile bewirken daher unterschiedliche Füge energien pro Schweißtakt und damit Abweichungen vom optimalen Wert«Fluctuations in the specified device parameters and tolerances of the parts thus cause different joining energies per welding cycle and thus deviations from the optimum value. «

d) Ziel der Erfindungd) Object of the invention

Ziel der Erfindung ist ein Verfahren zur Taktsteuerung einer Ultraschallfügeanlage, bei dem die Schv/eißzeit ν a r i a b e 1 als Funktion der in das Fügeteil eingekoppelten Energie bestimmt wird,The aim of the invention is a method for controlling the timing of an ultrasound assembly, in which the swarf time ν a r i a b e 1 is determined as a function of the energy coupled into the adherend,

e) Darlegung des Wesens der Erfindunge) Presentation of the essence of the invention

Ultraschallfügeanlagen sind mit elektromechanischen Wandlern ausgerüstet, die von einem elektrischen Generator gespeist werden. Die in das Fügeteil eingekoppelte mechanische Leistung ist näherungsweise linear abhängig von der elektrischen Leistungsaufnahme des Wandlers. Diese elek trische Leistung kann aus dem Verlauf von Strom und Spannung am Wandler leicht ermittelt werden.Ultrasonic lapping systems are equipped with electromechanical transducers powered by an electric generator. The coupled into the joining part mechanical power is approximately linearly dependent on the electrical power consumption of the converter. This elec trical power can be easily determined from the course of current and voltage at the converter.

^5 Eine spezielle elektronische Schaltung bildet aus diesen elektrischen Parametern eine der vom Wandler abgegebenen mechanischen Energie proportionale Größe.A special electronic circuit forms from these electrical parameters a quantity of mechanical energy delivered by the transducer.

Erreicht diese Größe einen vorgegebenen Grenzwert, so wird die Energiezufuhr zum Wandler unterbrochen.If this quantity reaches a predetermined limit value, the energy supply to the converter is interrupted.

ЗО f) AusführungsbeispielЗО f) embodiment

Bei einem piezoelektrischen Ultraschallwandler, der mittels AFC in Reihenresonanz gehalten wird, kann die energiepropor-In a piezoelectric ultrasonic transducer, which is held in series resonance by means of AFC, the energy-proportional

tionale Größe allein aus dem Spannungsverlauf während des Schweißtaktes gewonnen werden, wenn de* Strom durch den Wandler durch, eine spezielle Schaltungstechnik des Generators zwecks Amplitudenkonstanz der mechanischen Schwingung unabhängig von der Belastung bleibt. Die Leerlauf leistung des Wandlers wird durch eine Kompensationsschaltung Ъеі der Bildung der energieproportionalen Größe nicht err faßt. Überschreitet diese energieproportionale Größe ei nen für das vorgegebene Fügeteil optimalen 7/ert, so wird die Energiezufuhr zum Wandler unterbrochen.tionale size can be obtained solely from the voltage curve during the welding cycle, when the current passing through the converter, a special circuitry of the generator for the purpose of amplitude constancy of the mechanical vibration remains independent of the load. The idle power of the converter is a compensation circuit Ъеі the formation of energy-proportional size does not he sums r. If this energy-proportional quantity exceeds an optimum value for the given adherend, the energy supply to the converter is interrupted.

Bei der Ermittlung der energieproportionalen Größe wird der Spannungsverlauf am Wandler während der Einschv/ingphase der AFC-Schaltung nicht berücksichtigt.When determining the size proportional to energy, the voltage profile at the converter is not taken into account during the insertion phase of the AFC circuit.

Claims (3)

Erfindungsanspruchinvention claim 1· Verfahren zur Begrenzung der auf das Werkstück übertragenen Schweißenergie beim Ultraschallplastfügen gekennzeichnet dadurch, daß die Einwirkungszeit des Ultraschalls auf das Fügeteil in Abhängigkeit von der dem elektromechanischen Y/andler zugeführten Energie bestimmt wird·Method for limiting the welding energy transmitted to the workpiece during ultrasound lap welding, characterized in that the time of action of the ultrasound on the adherend is determined as a function of the energy supplied to the electromechanical transducer. 2. Verfahren nach Punkt 1 gekennzeichnet dadurch, daß bei der Signalgewinnung zur Begrenzung der Einwirkungszeit des Ultraschalls die elektrische Leerlaufleistung des Wand lers kompensiert wird.2. The method according to item 1, characterized in that the electrical idling power of the transducer is compensated for in the signal extraction to limit the exposure time of the ultrasound. 3. Verfahren nach Punkt 1 gekennzeichnet dadurch, daß bei der Signalgewinnung zur Begrenzung der Einwirkungszeit des Ultraschalls die Einschwingphase einer AFC-Schaltung unberücksichtigt bleibt.3. The method according to item 1, characterized in that the transient phase of an AFC circuit is disregarded in the signal acquisition to limit the exposure time of the ultrasound.
DD80226399A 1980-12-22 1980-12-22 PROCESS FOR LIMITING THE WELDING ENGINE TRANSMITTED TO THE WORKPIECE IN ULTRASOUND LUBRICANTS DD154343A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DD80226399A DD154343A1 (en) 1980-12-22 1980-12-22 PROCESS FOR LIMITING THE WELDING ENGINE TRANSMITTED TO THE WORKPIECE IN ULTRASOUND LUBRICANTS
DE19813138520 DE3138520A1 (en) 1980-12-22 1981-09-28 Method of limiting the welding energy transmitted to the workpiece in ultrasonic plastic welding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD80226399A DD154343A1 (en) 1980-12-22 1980-12-22 PROCESS FOR LIMITING THE WELDING ENGINE TRANSMITTED TO THE WORKPIECE IN ULTRASOUND LUBRICANTS

Publications (1)

Publication Number Publication Date
DD154343A1 true DD154343A1 (en) 1982-03-17

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DD (1) DD154343A1 (en)
DE (1) DE3138520A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9242439B2 (en) 2011-11-25 2016-01-26 Ms Spaichingen Gmbh Apparatus and method for welding

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE451972B (en) * 1985-06-28 1987-11-09 Tetra Pak Ab SET AND DEVICE FOR REGULATING ENERGY SUPPLY TO AN ULTRA SOUND SEAL
DE10046451A1 (en) 2000-09-18 2002-03-28 Spaichingen Gmbh Maschf Method and device for ultrasonic welding of workpieces
DE10324094B3 (en) * 2003-04-30 2004-09-09 Schunk Ultraschalltechnik Gmbh Ultrasonic welding system for joining electrical conductors together has converter and sonotrode and has control circuit comparing actual curve of pressure plotted against time with ideal curve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9242439B2 (en) 2011-11-25 2016-01-26 Ms Spaichingen Gmbh Apparatus and method for welding

Also Published As

Publication number Publication date
DE3138520A1 (en) 1983-01-05

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