WO1998024583A1 - Mecanisme d'entrainement par translation pour un coupe-fils - Google Patents

Mecanisme d'entrainement par translation pour un coupe-fils Download PDF

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Publication number
WO1998024583A1
WO1998024583A1 PCT/DE1997/002829 DE9702829W WO9824583A1 WO 1998024583 A1 WO1998024583 A1 WO 1998024583A1 DE 9702829 W DE9702829 W DE 9702829W WO 9824583 A1 WO9824583 A1 WO 9824583A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive
wire
translation drive
drive according
linear
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.)
Ceased
Application number
PCT/DE1997/002829
Other languages
German (de)
English (en)
Inventor
Hans Jürgen HESSE
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.)
Hesse and Knipps GmbH
Original Assignee
Hesse and Knipps GmbH
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 Hesse and Knipps GmbH filed Critical Hesse and Knipps GmbH
Priority to AU56502/98A priority Critical patent/AU5650298A/en
Publication of WO1998024583A1 publication Critical patent/WO1998024583A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
    • B23K20/023—Thermo-compression bonding
    • B23K20/025—Bonding tips therefor

Definitions

  • the invention relates to a translation drive for wire pliers for use in a wire bonder for mounting electronic components, in which the wire pliers are attached to a straight guide and can be moved in the longitudinal direction of the bonding wire used for bonding.
  • the wire bridge Before executing the first bond of a wire bridge, it is necessary to advance the bond wire under the working surface of the wedge, that is, to create a tail that allows the first bond to be carried out. After this first bond, the wire bridge becomes an arch second bond completed and after the execution of the second bond the bond wire torn in a defined manner.
  • the waist length itself depends on the geometric conditions of the wedge and the bond pads. If the waist length is too long, there is a risk of short circuits to neighboring bond pads. If the waist length is too short, an incorrect subsequent bond may have to be expected.
  • the length of the tear-off stroke after the second bond is not decisive for the bond itself, but is also decisive for the cycle time as a whole. In addition, the waist length and tear-off stroke are interdependent, so that a change in the waist length always entails a change in the tear-off stroke.
  • the wire tongs are driven with the aid of lifting magnets, which enable the wire tongs to be accelerated and moved quickly.
  • the path lengths of the different movements of the wire cutters can only be set here by the exact positioning of the stops. Since the change in waist length also requires a change in the tear-off stroke, a considerable amount of adjustment is required. This adjustment effort is exacerbated by the fact that after changing the settings, some bonds must always be carried out, which then have to be examined under the microscope to ensure that the desired effect has actually occurred.
  • the wire cutters on the bond head can be swiveled or in stored a linear guide.
  • Two solenoids arranged in parallel next to each other are usually used to drive the wire cutters, the armatures of which work together on a pivotably mounted intermediate lever.
  • This intermediate lever is coupled to the wire cutters via an output.
  • the intermediate lever is also connected to a tension spring so that it bears against the magnet armatures of the lifting magnets and can be pressed by the magnet armature of the lifting magnets against the spring force in the direction of the wire cutters.
  • the intermediate lever is pivotally mounted and that the lifting magnets arranged parallel next to one another act at different distances from the pivot point of the intermediate lever, there is the possibility of moving the intermediate lever into the respectively predetermined position by activating one of the lifting magnets.
  • the outer solenoid which is furthest away from the pivot point of the intermediate lever, a middle position can be reached and the maximum stroke can be carried out with the other solenoid.
  • JP 60-84829 A which mainly consists of a sliding table which can be moved longitudinally on a bonding arm and to which the wire cutters are attached.
  • the wire cutters are driven here with two lifting magnets against a spring force. Both solenoids perform different strokes, so that on the one hand the wire feed (generating the waist length) and on the other hand the wire break (return movement of the wire tong) can be realized.
  • the invention is therefore based on the object of providing a translation drive for a wire pliers for use in a wire bonder for mounting electronic components, in which the adjustment of the waist length and the tear-off stroke can be carried out at any time by the control software of the wire bonder.
  • the problem underlying the invention is achieved in a translation drive of the type mentioned above in that the drive and the positioning of the wire pliers from a zero position in both directions against a spring force with the aid of a linear drive connected to the program control of the wire bonder, which moves the moving elements of the Straight guidance couples together.
  • the linear drive can be designed in the form of a moving coil drive with electronic position control.
  • a moving coil drive or electromagnetic drive allows relatively long travel ranges with a high actuating force.
  • the moving coil drive preferably consists of a yoke, between the legs of which a movable voce-coil actuator is arranged.
  • This voice coil actuator enables particularly precise positioning with sufficiently large actuation force, so that good acceleration values are achieved.
  • a linear stepping motor which is suitable for micropositioning and which permits particularly simple position control can be used as the linear drive. Additional devices for measuring the respective position of the wire cutters are not required in this case.
  • the straight guide is designed as a parallel guide, the use of a leaf spring parallel guide having the particular advantage that the zero position of the system is determined by the zero position of the leaf springs.
  • the leaf spring parallel guide preferably consists of a fixed base plate and a plate arranged parallel to this, which are connected to one another via leaf springs, the linear drive being arranged on the base plate and having its movable part coupled to the movable plate.
  • the leaf springs are advantageously detachable with the base plate 1 or the plate 2 connected so that in the event of damage, the same can be easily replaced.
  • the straight guide can also be designed as a ball-bearing linear guide.
  • a perspective view of a translation drive according to the invention with a voice coil drive can be seen from the associated drawing.
  • the translation drive consists of a rigid base plate 1 and a further rigid plate 2, which are connected to each other by means of two leaf springs 3, 4 in a parallelogram-like manner and displaceable relative to one another.
  • the connection of the leaf springs 3, 4 to the plates 1, 2 takes place by a positive and non-positive connection by means of a screw connection, by additional pressure plates 5, 6, 7, 8 with the ends of the leaf springs 3, 4 being interposed with the end faces the plates 1, 2 are screwed or riveted.
  • the unit consisting of the base plate 1, the plate 2 and the leaf springs 3, 4 or leaf spring-like elements in one piece, which can be done with known cutting or eroding processes.
  • the leaf spring-like elements which connect the base plate 1 and the plate 2 to one another can be designed to be relatively rigid.
  • the junction between the leaf spring-like elements and the base plate 1 or the plate 2 is then designed as a solid joint.
  • the base plate 1 is firmly connected to the bonding head, not shown, so that the plate 2 can be moved essentially parallel to it.
  • the particular advantage of this constructive solution can be seen in the fact that the movement of the plate 2 against the spring force of the leaf springs 3, 4 can take place without any friction.
  • a wire tongs 9 to be moved in the longitudinal direction of the bonding wire used for bonding are also attached to the plate 2.
  • the wire cutters 9 consist of two pliers jaws 10, 11 which are also movable relative to one another and which are connected to one another via a further leaf spring parallel guide consisting of the leaf springs 12, 13.
  • the carrier 14 of the fixed jaw 11 is here connected to the plate 2.
  • the drive for the pliers jaws 10, 11 is not described in more detail at this point, but can be carried out in a similar manner to that shown below with the aid of the translation drive for the wire pliers 9.
  • This drive 15 is designed as a linear drive, for example in the form of a moving coil drive and, in conjunction with a rapid position control and associated position determination, allows the wire pliers 9 to be precisely positioned and moved.
  • This linear drive consists of a yoke 16 which is fastened to the base plate 1 by means of a base plate 17 is and between the legs 18, 19 of the yoke 16 movable voice coil actuator 20, which operates on a driver 21 connected to the plate 2.
  • the voice coil actuator 20 and the driver 21 are firmly connected to one another in order to be able to carry out a controlled linear movement in both directions, starting from the mechanical zero position of the system.
  • the amount of movement and the end position can be with this arrangement easily through the position control and the program control of the bonder. This eliminates the need to arrange end stops, since the system allows precise and fast position control.
  • the linear stepper motor allows the wire tongs 9 to be positioned directly without a position determination and an associated position control being required for this.
  • the positioning of the wire cutters 9, i.e. the amount of the desired movement can be done here by specifying a number of pulses by the program control of the bonder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Bonding (AREA)

Abstract

L'invention concerne un mécanisme d'entraînement par translation pour un coupe-fils utile dans une microsoudeuse de fils de connexion de composants électroniques. Le coupe-fils est assujetti dans un guide rectiligne et peut se déplacer dans le sens de la longueur du fil de connexion utilisé. L'objet de l'invention est de créer un mécanisme d'entraînement par translation pour un coupe-fils utile dans une microsoudeuse de fils de connexion de composants électroniques qui permette d'ajuster sans problèmes à tout moment la longueur du bout et la course de déchirure au moyen du logiciel de commande de la microsoudeuse de fils. L'invention se caractérise en ce que le coupe-fils (9) est entraîné et positionné dans les deux directions depuis une position zéro, contre la force de ressorts à lames (3, 4), au moyen d'un mécanisme d'entraînement sous forme d'un mécanisme d'entraînement à bobine mobile, d'un moteur linéaire ou d'un mécanisme piézo-électrique d'entraînement connecté à la commande du programme de la microsoudeuse de fils et qui couple les éléments mobiles du guide rectiligne les uns aux autres.
PCT/DE1997/002829 1996-12-04 1997-12-03 Mecanisme d'entrainement par translation pour un coupe-fils Ceased WO1998024583A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU56502/98A AU5650298A (en) 1996-12-04 1997-12-03 Translation drive for cutting pliers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19650311A DE19650311A1 (de) 1996-12-04 1996-12-04 Translationsantrieb für eine Drehzange
DE19650311.6 1996-12-04

Publications (1)

Publication Number Publication Date
WO1998024583A1 true WO1998024583A1 (fr) 1998-06-11

Family

ID=7813636

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/002829 Ceased WO1998024583A1 (fr) 1996-12-04 1997-12-03 Mecanisme d'entrainement par translation pour un coupe-fils

Country Status (3)

Country Link
AU (1) AU5650298A (fr)
DE (1) DE19650311A1 (fr)
WO (1) WO1998024583A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6427897B2 (en) 1998-06-09 2002-08-06 Hess & Knipps Gmbh Feed unit for moving parts
DE102018202868A1 (de) * 2018-02-26 2019-08-29 Krones Ag Verfahren und Vorrichtung zur Justage eines Transportfahrzeugs für eine Behälterbehandlungsanlage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610387A (en) * 1983-12-19 1986-09-09 Robotica S.R.L. Device for bonding wire leads in electronic components
US4653681A (en) * 1985-05-16 1987-03-31 Kulicke And Soffa Industries, Inc. Voice coil actuated fine wire clamp
EP0340506A1 (fr) * 1988-05-05 1989-11-08 Esec Sa Dispositif de connexion par fils de contact par ultrasons à des composants électroniques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610387A (en) * 1983-12-19 1986-09-09 Robotica S.R.L. Device for bonding wire leads in electronic components
US4653681A (en) * 1985-05-16 1987-03-31 Kulicke And Soffa Industries, Inc. Voice coil actuated fine wire clamp
EP0340506A1 (fr) * 1988-05-05 1989-11-08 Esec Sa Dispositif de connexion par fils de contact par ultrasons à des composants électroniques

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6427897B2 (en) 1998-06-09 2002-08-06 Hess & Knipps Gmbh Feed unit for moving parts
DE19981030B4 (de) * 1998-06-09 2015-04-02 Hesse Gmbh Vorschubeinheit zum Bewegen von Bauteilen
DE102018202868A1 (de) * 2018-02-26 2019-08-29 Krones Ag Verfahren und Vorrichtung zur Justage eines Transportfahrzeugs für eine Behälterbehandlungsanlage

Also Published As

Publication number Publication date
DE19650311A1 (de) 1998-06-10
AU5650298A (en) 1998-06-29

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