EP0018800B1 - Herstellung konischer Körper und auf diese Weise hergestellte elektrische Steckverbindungshülsen - Google Patents

Herstellung konischer Körper und auf diese Weise hergestellte elektrische Steckverbindungshülsen Download PDF

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Publication number
EP0018800B1
EP0018800B1 EP80301365A EP80301365A EP0018800B1 EP 0018800 B1 EP0018800 B1 EP 0018800B1 EP 80301365 A EP80301365 A EP 80301365A EP 80301365 A EP80301365 A EP 80301365A EP 0018800 B1 EP0018800 B1 EP 0018800B1
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EP
European Patent Office
Prior art keywords
blank
web
area
extent
varies
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
EP80301365A
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English (en)
French (fr)
Other versions
EP0018800A1 (de
Inventor
Benjamin Airey
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.)
Balfour Beatty PLC
FCI USA LLC
Original Assignee
BICC PLC
Burndy Corp
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 BICC PLC, Burndy Corp filed Critical BICC PLC
Priority to AT80301365T priority Critical patent/ATE1482T1/de
Publication of EP0018800A1 publication Critical patent/EP0018800A1/de
Application granted granted Critical
Publication of EP0018800B1 publication Critical patent/EP0018800B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
    • H01R4/5083—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using a wedge

Definitions

  • This invention relates to the manufacture of tapered bodies of ductile material comprising two parts each cf uniform cross-section extending along opposite sides of and united by at least one web that is wider at one of its ends than the other.
  • An important application of the invention is in making receptacles for electric tapping connectors in which the parts of uniform cross-section are channels facing inwardly to receive separate electric conductors that are secured and electrically connected by a wedge driven between them.
  • Such bodies can be made by casting, but for many purposes the mechanical properties of metal (or other ductile material) that has been worked are much superior to cast material. Machining would be prohibitively expensive, and the current technique of bending an initially flat blank to form the parts of uniform cross-section restricts the cross-sectional shapes it is practicable to use (and is applicable only to shapes with a single web).
  • the tapered hollow body can also be a forging, as in US-A-2641 810.
  • a blank comprising two parts of uniform cross-section extending along opposite sides of and united by at least one web of uniform width is first extruded; and then the web or each of the webs is formed between press tools acting on it to an extent that varies and/or over an area that tapers along the length of the blank so as to increase its width to an extent that varies along the length of the blank.
  • the web of the extruded blank is planar and in this case the press tools will reduce its thickness to an extent that varies and/or over an area that tapers along the length of the blank.
  • the extruded blank were formed with a curved web. It would be possible, as an alternative (or a supplement) to reducing its thickness, for the press tools to reduce the curvature of the web to an extent that varies and/or over an area that tapers along the length of the blank; and it will be understood that when the area tapers the curvature can be completely removed over that area.
  • a plurality of blanks may be extruded in a continuous length and subsequently sheared or sawn from one another.
  • the area of reduced thickness or reduced curvature (or each of the areas if there is more than one) is defined by a raised area on one of the press tools (or corresponding raised areas on both of them), which will ordinarily be approximately triangular with its base at the wider end of the finished body.
  • the raised area is preferably flat or inclined, and preferably the edges of the raised area are oblique.
  • the product is an electric connector receptacle into which a co-operating weuge will enter to secure conductors
  • it is preferably also formed in the pressing operation with ribs or other formations for engaging a projection on the wedge to increase resistance of slackening of the wedge.
  • the invention is especially applicable to articles of heat-treatable aluminium alloys. which are extruded in nominally half-hard condition, cooled slowly (e.g. in still air) to avoid age-hardening, and heat-treated to the TF condition after forming. It can however oe used effectively with other ductile materials. such as for example copper, aluminium bronze and other copper alloys; in some cases the blank could incorporate more than one material.
  • standard heat-treatment aluminium alloy HE30 is first extruded to the cross-section shown in figure 1 and comprising two channel portions 1, 2 of any desired cross-section and a planar connecting web 3.
  • the channel portions can usefully be formed with splines 4 or grooves and this is advantageous for some electrical connector receptacies.
  • the extrudate is cooled in still air and then cut into individual blanks.
  • Each blank is then positioned In turn. open side down, on a tool of the form shown in figure 2, with the web 3 on top of the tool the flanges 5,5 loosely received in channels 6 6 :n the tool, and an end of the blank against a stop surface 7 on the tool.
  • the blank is now pressed onto the tool using a flat co-operating tool ⁇ not shown in the drawings) to reduce its thickness over the area 8 (figures 5-7). Both the width of the reduced area and the extent of reduction increase steadily from the line 9 to the line 10.
  • the effect of the deformation is to introduce a taper of about eight degrees between the two channels.
  • the tool is formed with grooves 11, as shown in figure 2, to form ribs 12 of sawtooth or other suitable profile extending transversely across the area 8 for reasons explained below.
  • the now-tapered receptacle After forming the now-tapered receptacle is put through the standard heat-treatment to convert it to the TF condition, namely solution treating at 520-530°C followed by quenching in cold water and precipitation heat-treatment at 180°C for 5-6 hours.
  • exposed sharp edges and especially the edges 13 that will engage the conductors in use are desirably chamfered.
  • the co-operating wedge shown in figures 8-12, is die-cast and has concave wedge faces 14 comprising a main section 15 (figure 10) with a taper angle substantially the same as the taper angle of the receptacle merging into a lead-in section 16 with a slightly larger taper angle. All corners 17 adjoining the wedge faces are generously radiussed.
  • the side faces 18 of the wedge are slightly convex and each bears at the wider end a ribbed projection 19, so that whichever way up the wedge is inserted in the receptacle, the ribs 12 will be engaged by one of the projections 19.
  • the ribs of projection 19 correspond in spacing and broadly in shape to the recesses between the ribs 12, but the ribs of 19 are of uniform height. When the wedge is driven home, the ribs interlock to increase resistance to slackening of the wedge.
  • the modified receptacles shown in figure 13 differs in the shape of the area 8; other, similar, variations may be made.
  • Figures 14 and 15 illustrate the use of an extruded blank with a curved web; the blanks are of the shape shown in dotted lines and are the same in both cases.
  • the press tools act on the triangular area 20 and reduce it to a planar (but oblique) shape, while the areas 21 remain curved substantially as extruded.
  • two triangular areas 22 are flattened until they are each coplanar with the contiguous side of the channels 1, 2 respectively and a central triangular area 23 remains curved (though displaced from its original position, except at the extremity of its wide end).

Landscapes

  • Manufacturing Of Electrical Connectors (AREA)
  • Extrusion Of Metal (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Claims (6)

1. Verfahren zum Herstellen eines konischen Körpers aus duktilem Metall, der zwei Teile mit jeweils konstantem Querschnitt (1,2) aufweist, die sich an gegenüberliegenden Seiten mindestens eines Steges (3) erstrecken und durch diesen miteinander verbunden sind, wobei der Steg am einen Ende breiter als am anderen Ende ist, gekennzeichnet durch folgende Verfahrensschritte:
(i) Stangpressen eines Rohlings, der zwei Teile mit konstantem Querschnitt aufweist, die sich an gegenüberliegenden Seiten mindestens eines gleichmäßig breiten Steges erstrecken und durch diesen miteinander verbunden sind, und anschließend
(ii) Ausbilden des Steges bzw. jedes Steges zwischen Preßwerkzeugen, die darauf in unterschiedlichem Maße und/oder über eine in Längsrichtung des Rohlings sich verjüngende Fläche einwirken, so daß die Breite des Rohlings über seine Längsrichtung in unterschiedlichem Maße vergrößert wird.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Preßwerkzeuge die Dicke des Steges in unterschiedlichem Maße und/oder über eine in Längsrichtung des Rohlings sich verjüngende Fläche verringern.
3. Verfahren nach Anspruch 1, bei dem der stranggepreßte Rohling einen gekrümmten Steg aufweist, dadurch gekennzeichnet, daß die Preßwerkzeuge die Krümmung des Steges (mit oder ohne Verringerung dessen Dicke) in unterschiedlichem Maße und/oder über eine in Längsrichtung des Rohlings sich verjüngende Fläche verringern.
4. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Fläche verringerter Dicke oder verringerter Krümmung durch eine erhabene Fläche an einem der Preßwerkzeuge oder durch korrespondierende erhabene Fläche an beiden Preßwerkzeugen ausgebildet wird.
5. Verfahren nach einem der vorstehender, Ansprüche, bei dem das duktile Metall eine wärmebehandelbare Aluminiumlegierung ist, dadurch gekennzeichnet, daß die Legierung in zunächst halbfestem Zustand stranggepreßt, zur Vermeidung von Aushärtung vor dem Verformungsschritt langsam abgekühlt und nach der Verformung zum Überführen in den TF-Zustand wärmebehandelt wird.
6. Elektrische Steckverbindungshülse, hergestellt mit dem Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Steckverbindungshülse im Preßvorgang mit Rippen oder anderen Ausbildungen versehen wird, die mit einem Vorsprung an einem mit ihr zusammenwirkenden Keil in Eingriff kommen, um ein Lockern des Keiles zu erschweren.
EP80301365A 1979-04-26 1980-04-25 Herstellung konischer Körper und auf diese Weise hergestellte elektrische Steckverbindungshülsen Expired EP0018800B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80301365T ATE1482T1 (de) 1979-04-26 1980-04-25 Herstellung konischer koerper und auf diese weise hergestellte elektrische steckverbindungshuelsen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB7914543 1979-04-26
GB7914543 1979-04-26
GB7919682 1979-06-06
GB7919682 1979-06-06

Publications (2)

Publication Number Publication Date
EP0018800A1 EP0018800A1 (de) 1980-11-12
EP0018800B1 true EP0018800B1 (de) 1982-08-25

Family

ID=26271334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80301365A Expired EP0018800B1 (de) 1979-04-26 1980-04-25 Herstellung konischer Körper und auf diese Weise hergestellte elektrische Steckverbindungshülsen

Country Status (4)

Country Link
EP (1) EP0018800B1 (de)
DE (1) DE3060774D1 (de)
FI (1) FI84792C (de)
IE (1) IE49589B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109514206A (zh) * 2018-12-27 2019-03-26 永固集团股份有限公司 楔型线夹壳体的制造方法及用于制造楔型线夹壳体的型材

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5679031A (en) * 1995-08-23 1997-10-21 Framatome Connectors Usa Inc. Electrical wedge connector with retention barbs
US5674097A (en) * 1995-09-15 1997-10-07 The Whitaker Corporation Electrical connector with wedge
CN112332117B (zh) * 2020-09-25 2022-05-17 国网浙江慈溪市供电有限公司 一种楔形线夹

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641810A (en) * 1949-03-14 1953-06-16 American Hoist & Derrick Co Plural cable clamp
GB944544A (en) * 1962-06-05 1963-12-18 Amp Inc Electrical terminal connector
US3627942A (en) * 1964-04-09 1971-12-14 Amp Inc Terminal block having an opening therein with normally engaged contacts in alignment with the opening and a plug for engagement with the contacts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109514206A (zh) * 2018-12-27 2019-03-26 永固集团股份有限公司 楔型线夹壳体的制造方法及用于制造楔型线夹壳体的型材

Also Published As

Publication number Publication date
FI84792B (fi) 1991-10-15
DE3060774D1 (en) 1982-10-21
IE49589B1 (en) 1985-10-30
FI801347A7 (fi) 1980-10-27
IE800854L (en) 1980-10-26
FI84792C (fi) 1992-01-27
EP0018800A1 (de) 1980-11-12

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