EP0499100A2 - Procédé pour la fabrication des résistances confectionnées - Google Patents

Procédé pour la fabrication des résistances confectionnées Download PDF

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Publication number
EP0499100A2
EP0499100A2 EP92101601A EP92101601A EP0499100A2 EP 0499100 A2 EP0499100 A2 EP 0499100A2 EP 92101601 A EP92101601 A EP 92101601A EP 92101601 A EP92101601 A EP 92101601A EP 0499100 A2 EP0499100 A2 EP 0499100A2
Authority
EP
European Patent Office
Prior art keywords
ptc element
support
ptc
connecting wires
cover
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.)
Granted
Application number
EP92101601A
Other languages
German (de)
English (en)
Other versions
EP0499100A3 (en
EP0499100B1 (fr
Inventor
Peter Hofsäss
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.)
ERBENGEMEINSCHAFT PETER HOFSAESS: HOFSAESS, U. HOF
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP95105563A priority Critical patent/EP0677855B1/fr
Publication of EP0499100A2 publication Critical patent/EP0499100A2/fr
Publication of EP0499100A3 publication Critical patent/EP0499100A3/de
Application granted granted Critical
Publication of EP0499100B1 publication Critical patent/EP0499100B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/28—Apparatus or processes specially adapted for manufacturing resistors adapted for applying terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors
    • H01C1/1406—Terminals or electrodes formed on resistive elements having positive temperature coefficient
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49085—Thermally variable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49101—Applying terminal

Definitions

  • the invention relates to a method for producing assembled self-stabilizing resistors, in particular for use on coil windings, such as for electric motors, two opposite side faces of a PTC element being electrically connected to connecting wires, and to a assembled self-stabilizing resistor, in particular for use on coil windings, such as for electric motors. with a flat PTC element and with this electrically connected connecting wires.
  • Self-stabilizing resistors which have PTC elements, are used to monitor electrotechnical devices, in particular to monitor coil windings, such as those of electric motors or the like. with which electrical connection wires are connected.
  • the resistors are partially wrapped in close thermal contact with the electrical device, such as the coil, for example by the coil winding wire.
  • the connecting wires are soldered directly to the PTC elements, which are provided with a solderable metallic contact surface, such as a vapor-deposited silver coating.
  • the connecting wires are usually soldered by hand.
  • the invention is therefore based on the object of providing a method of the type mentioned at the outset which enables economical and inexpensive production of such assembled self-stabilizing resistors.
  • the stated object is achieved by a method of the type mentioned at the outset, which is characterized in that support and cover surfaces for the PTC elements are punched out on a metallic carrier tape, that a PTC element is placed and fastened on each support surface in such a way that the cover surface is bent over the PTC element, the support and cover surfaces are provided with connecting wires, and the cover and support surfaces are separated from the rest of the carrier tape.
  • a New assembled self-stabilizing resistor differs from the known resistors in that on opposite end faces of the PTC element sheet metal plates (support and cover surfaces) are soldered, which have superior approaches to the PTC element, to which the connecting wires are attached.
  • the method according to the invention provides that the PTC elements, which form individual parts that are difficult to process by hand, are held and conveyed by a quasi-endless carrier tape during the assembly process - at least until the PTC elements are connected to connecting wires, which then can in turn be strapped in a manner known per se, whereupon the further automatic conveying can take place in a defined form and with a defined relative distance of the PTC elements through the straps engaging on the connecting wires.
  • the PTC elements are kept defined and all machining and processing operations can be carried out fully automatically in the stations of a processing device.
  • the PTC elements can be fed to the endless carrier belt from a vibrating pot either via a slide with a locking slide.
  • the slide ends directly in front of the support surface for a PTC element on the carrier tape. If such a support surface was conveyed in front of the slide, the locking slide can release a PTC element so that it can slide onto the support surface. The others are then held back by the slide or corresponding slide.
  • Positioning pins can be provided which center the PTC element on the contact surface.
  • grippers can be provided which grip the PTC elements and place them on the support surface.
  • a cover surface is brought over it, so that the PTC element is sandwiched between the support surface and the cover surface. If solder was previously applied to the support and cover surface, the PTC elements can now be soldered to the support and cover surface.
  • PTC elements are also used here, which are provided with a metallic contact. The soldering can be done by high frequency. The PTC elements are then firmly connected to the carrier tape and are therefore conveyed through this to the further processing and processing stations.
  • protruding approaches for fixing the connecting wires are punched out from the support and cover surface. This facilitates the attachment, preferably welding, of the connecting wires to the support and cover surface for producing electrical connection contacts to the PTC element.
  • edges of the approaches are bent perpendicular to them.
  • the cover surface comes to lie flat on the PTC element can be provided in advance that the top surface is first bent before it is bent over the PTC element from the plane of the carrier tape while maintaining its parallel extension to this.
  • the offset of the top surface to the level of the carrier tape essentially corresponds to the thickness of the PTC element.
  • the approaches to which the connecting wires are later attached show their usefulness, in particular if they are aligned parallel to one another, but are arranged offset from one another in plan view.
  • contact pins can be pressed against the lugs in parallel from top to bottom. This makes it possible to guide the carrier tape through the temperature bath in a horizontal orientation. It is not necessary for a contact pin to pass through the bottom of the temperature bath tub from below is performed, which would require difficult sealing. Furthermore, it is also not necessary to connect the carrier tape in any way in order to bring it in a vertical direction, so that contact pins could run in a horizontal direction from both sides against the support and cover surface. Connecting the carrier tape or conveying it vertically, at least over partial areas, would also cause problems, among other things due to the inherent rigidity of the carrier tape.
  • PTC elements identified as defective in the above checking step can then be removed from the carrier tape and thus eliminated by providing a punching device at an appropriate clock step distance from the testing device and the corresponding number of conveying cycles later the corresponding PTC element by punching the connecting tab from the carrier tape is eliminated.
  • a single connecting wire can be attached to each of the approaches on the support and top surface.
  • two or more PTC elements can also be connected in series.
  • one end of a piece of wire is connected to the top surface of the first PTC element and the other end of the piece of wire is connected to the contact surface of the immediately following PTC element and that the contact surface of the first PTC element and the top surface of the second PTC element are each provided with individual wires or that for the series connection of three PTC elements in each case the first end of a connecting wire with the top surface of a preceding PTC element and the second end of the connecting wire in each case with the immediately following PTC element. element are connected and that the contact surface of the first PTC element and the top surface of the third PTC element are provided with individual connecting wires.
  • the connecting wires are strapped after fastening.
  • the ready-made resistors are conveyed for further processing, which may consist in that the PTC elements connected to the support and cover surface and provided with connecting wires are provided with an insulation layer, in particular in that the PTC elements connected to the support and cover surface Elements can be provided with a powder coating. Furthermore, a shrink sleeve can be pushed on and shrunk on.
  • the method according to the invention for producing self-stabilizing resistors for use on coil windings, such as for electric motors, is based on an endless carrier tape 1 made of thin sheet metal. Support surfaces 2 and cover surfaces 3 for PTC elements 4 are punched out of the carrier tape and are further held on a narrow holding strip 6 via connecting sections 7, 8 extending therefrom (method step A). On the cover and support surface 2, 3 extend essentially tangential lugs 9, 11 for later receiving and fixing connecting wires.
  • Openings 12 are also punched out of the holding strip 6, by means of which, during further processing, an exact positioning of the holding strip 6 and thus also the cover and support surfaces 2, 3 can be effected.
  • edges 13 (FIGS. 2a, b) of the projections 9, 11 are bent upwards in the plan view of FIG. 1.
  • the top surface 3 is offset approximately as far from the plane of the carrier tape 6, but still lying parallel to it, as corresponds to the thickness of the PTC element 4.
  • Cover and support surface 2, 3 can also be plate-shaped or bowl-shaped, as can be seen in FIG. 2b, so that edges 14 are formed which can encompass and center the PTC element 4 around its circumference.
  • solder 16 is applied to the support and cover surface 2, 3.
  • a PTC element in the form of a PTC pill is placed on the soldered support surface.
  • the PTC elements can be conveyed on a vibrating pot 17 and either taken over by a gripper and placed on the support surface 2 or conveyed to the support surfaces 2 by means of a slide and an exposed stop.
  • positioning pins 18 can be provided in addition to the contact surface 2, which, when a new contact surface 2 comes into their area, are moved upwards and hold the PTC element 4 between them.
  • step E the tab 7 carrying the top surface 3 is bent in such a way that the top surface 3 is brought exactly over the PTC element 4. The result of this step is shown on the one hand in FIGS.
  • the PTC element 4 and the support and cover surface 2, 3 are soldered to the previously applied solder 16.
  • the soldering is preferably carried out at high frequency, that is to say by means of a high-frequency generator.
  • the PTC element 4 has been fastened in this way to the support surface 2 and thus also the cover surface 3 has been fixed via the PTC element 4
  • its carrier tab 7 can be separated from the carrier tape 6, for example at the point indicated by 19 (FIG. 2b). This takes place in method step G.
  • the support surface 2 with the carrier tape 6 and the cover surface 3 are electrically separated from one another, so they no longer form a short-circuit connection.
  • step J a cutting of defective PTC elements takes place, the faultiness being determined in the above-mentioned test process.
  • the lugs 9, 11 are then provided with corresponding connecting wires 23, 24 (FIG. 3).
  • a plurality of PTC elements 4 are to be interconnected in series, for example two PTC elements in a twin circuit or three PTC elements in a triplet circuit, as shown in FIG. 3, the connection ends 26, 27 of a U -shaped wire 23 connected on the one hand to the shoulder 11 of the cover part 3 of a PTC element (end 27) and on the other hand (end 26) to the shoulder 9 of the support part 2.
  • the wire ends 26, 27 are preferably welded to the lugs 9, 11 (step K1). In step K1 'it can be seen how three successive PTC elements are connected in series with one another by two U-shaped connecting wires.
  • step K2 the individual connecting strands 24 are attached to the free lugs 9 and 11, respectively.
  • the connecting wires 23 are prepared in such a way that they are pulled off a wire roll, first of all at a front end in a stripping block 28 there is sufficient stripping of the front wire end, and then the wire is conveyed along two aligned grippers 29 that are pivotable relative to one another. After the required wire length has been reached, the piece of wire 23 is separated from the remaining wire and stripping is also carried out at the rear end (26).
  • the grippers 29 pivot against one another and thereby bend the piece of wire 23 into the U-shape shown at the beginning of FIG. 3, in which the start (27) and end 26 of the wire reach the parallel orientation shown.
  • connection wires 23, 24 After the connection wires 23, 24 have been attached, they are preferably taped, for example sandwiched between two adhesive tapes, which can be done in a conventional manner (step L). After the connecting wires 23, 24 and then the PTC elements are held by the belts 31, the PTC elements can be completely separated from the carrier tape 6 by a complete separation at 32 (FIG. 2b) (step M).
  • the self-stabilizing resistors produced in this way can now be fed to further processing steps.
  • Coating can be carried out, for example casting or powder coating.
  • step N the initially horizontally conveyed resistors 33 are pivoted through 90 °, so that the connecting wires point upwards. This is done by passing the belt 31 between rollers 34, 36, which are provided in pairs and are perpendicular to one another.
  • the resistors 33 are passed through a powder bath.
  • the adhesion of the powders is then melted by heat that can be generated by a radiator 37, cools down again and forms a tight coating (step O).
  • step O a shrink cap 3 can be pushed over the resistors 33.
  • step P an endless hose 39
  • step Q possibly closed in its free end and provided with a label
  • It can be supported on a circular conveyor 39.
  • step R the self-stabilizing Resistors 33 pushed on (step R), whereupon a shrinking process can finally follow in step S, so that the shrink cap 38 tightly envelops the resistor 33.
  • step S the connecting wires 23, 24 can be shortened.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Thermistors And Varistors (AREA)
  • Details Of Resistors (AREA)
  • Non-Adjustable Resistors (AREA)
  • Non-Insulated Conductors (AREA)
  • Electronic Switches (AREA)
EP92101601A 1991-02-15 1992-01-31 Procédé pour la fabrication des résistances confectionnées Expired - Lifetime EP0499100B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95105563A EP0677855B1 (fr) 1991-02-15 1992-01-31 Résistance

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4104709A DE4104709A1 (de) 1991-02-15 1991-02-15 Verfahren zum herstellen konfektionierter selbststabilisierender widerstaende und derartige widerstaende
DE4104709 1991-02-15

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP95105563.1 Division-Into 1992-01-31
EP95105563A Division EP0677855B1 (fr) 1991-02-15 1992-01-31 Résistance

Publications (3)

Publication Number Publication Date
EP0499100A2 true EP0499100A2 (fr) 1992-08-19
EP0499100A3 EP0499100A3 (en) 1993-04-21
EP0499100B1 EP0499100B1 (fr) 1996-05-08

Family

ID=6425140

Family Applications (2)

Application Number Title Priority Date Filing Date
EP92101601A Expired - Lifetime EP0499100B1 (fr) 1991-02-15 1992-01-31 Procédé pour la fabrication des résistances confectionnées
EP95105563A Expired - Lifetime EP0677855B1 (fr) 1991-02-15 1992-01-31 Résistance

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP95105563A Expired - Lifetime EP0677855B1 (fr) 1991-02-15 1992-01-31 Résistance

Country Status (5)

Country Link
US (1) US5239745A (fr)
EP (2) EP0499100B1 (fr)
JP (1) JP3270097B2 (fr)
AT (2) ATE162332T1 (fr)
DE (3) DE4104709A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998044516A1 (fr) * 1997-03-27 1998-10-08 Littelfuse, Inc. Dispositif de protection de circuit automobile rearmable

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0831606A (ja) * 1994-07-19 1996-02-02 Murata Mfg Co Ltd 電子部品
DE29521353U1 (de) * 1994-12-21 1997-02-06 Renk Ag, 86159 Augsburg Gleitlager
US5835004A (en) * 1995-04-21 1998-11-10 Raychem Corporation Electrical devices and assemblies
GB9613216D0 (en) * 1996-06-25 1996-08-28 Bowthorpe Components Ltd Thermistor device
US6058004A (en) * 1997-09-08 2000-05-02 Delaware Capital Formation, Inc. Unitized discrete electronic component arrays
US6091317A (en) * 1998-07-06 2000-07-18 Ford Motor Company Temperature sensor assembly
TW463184B (en) * 1999-04-09 2001-11-11 Murata Manufacturing Co Temperature sensor, method of producing same and method of mounting same to a circuit board
US9587848B2 (en) 2013-12-11 2017-03-07 Honeywell International Inc. Building automation controller with rear projecting light
US10488062B2 (en) 2016-07-22 2019-11-26 Ademco Inc. Geofence plus schedule for a building controller
US10895883B2 (en) 2016-08-26 2021-01-19 Ademco Inc. HVAC controller with a temperature sensor mounted on a flex circuit
CN119446694B (zh) * 2024-12-10 2025-06-10 业展电子(惠州市)有限公司 合金电阻冲压装置、电阻生产工艺及合金电阻

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Publication number Priority date Publication date Assignee Title
US3117297A (en) * 1964-01-07 figure
GB411512A (en) * 1932-12-06 1934-06-06 Pye Radio Ltd Improvements in and relating to electric resistances
US2659871A (en) * 1949-10-03 1953-11-17 Aircraft Marine Prod Inc Electrical connector strip having laterally displaced strip feeding edges
US3322655A (en) * 1963-08-12 1967-05-30 United Aircraft Corp Method of making terminated microwafers
DE1490246B2 (de) * 1964-06-23 1974-07-04 Resista Fabrik Elektrischer Widerstaende Gmbh, 8300 Landshut Verfahren zum Anbringen von Kontaktierangsteilen an elektrischen Bauelementen
DE2623606A1 (de) * 1976-05-26 1977-12-08 Draloric Electronic Verfahren zur herstellung eines elektrischen schichtwiderstandes
JPH0690964B2 (ja) * 1986-03-31 1994-11-14 日本メクトロン株式会社 Ｐｔｃ素子の製造法
DE3703465C2 (de) * 1987-02-05 1998-02-19 Behr Thomson Dehnstoffregler Verfahren zum Herstellen eines elektrischen Schaltgerätes und elektrisches Schaltgerät
US4926542A (en) * 1988-08-26 1990-05-22 Dale Electronic, Inc. Method of making a surface mount wirewound resistor
JPH0311701A (ja) * 1989-06-09 1991-01-21 Murata Mfg Co Ltd 正特性サーミスタ装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998044516A1 (fr) * 1997-03-27 1998-10-08 Littelfuse, Inc. Dispositif de protection de circuit automobile rearmable

Also Published As

Publication number Publication date
EP0499100A3 (en) 1993-04-21
DE59209141D1 (de) 1998-02-19
ATE137883T1 (de) 1996-05-15
DE59206205D1 (de) 1996-06-13
JP3270097B2 (ja) 2002-04-02
US5239745A (en) 1993-08-31
ATE162332T1 (de) 1998-01-15
EP0677855A1 (fr) 1995-10-18
JPH05226121A (ja) 1993-09-03
DE4104709A1 (de) 1992-08-20
EP0499100B1 (fr) 1996-05-08
EP0677855B1 (fr) 1998-01-14

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