EP3552273A1 - Procédé de fabrication d'un contact femelle - Google Patents

Procédé de fabrication d'un contact femelle

Info

Publication number
EP3552273A1
EP3552273A1 EP17808946.2A EP17808946A EP3552273A1 EP 3552273 A1 EP3552273 A1 EP 3552273A1 EP 17808946 A EP17808946 A EP 17808946A EP 3552273 A1 EP3552273 A1 EP 3552273A1
Authority
EP
European Patent Office
Prior art keywords
contact
region
socket contact
contacting region
socket
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
EP17808946.2A
Other languages
German (de)
English (en)
Other versions
EP3552273B1 (fr
Inventor
Dennis FASSMANN
Maik DAHNKE
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.)
Phoenix Contact GmbH and Co KG
Original Assignee
Phoenix Contact GmbH and Co KG
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 Phoenix Contact GmbH and Co KG filed Critical Phoenix Contact GmbH and Co KG
Publication of EP3552273A1 publication Critical patent/EP3552273A1/fr
Application granted granted Critical
Publication of EP3552273B1 publication Critical patent/EP3552273B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/18—Making uncoated products by impact extrusion
    • B21C23/186—Making uncoated products by impact extrusion by backward extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K23/00—Making other articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/111—Resilient sockets co-operating with pins having a circular transverse section

Definitions

  • the invention relates to a method for producing a socket contact from a round rod.
  • the invention also relates to a socket contact produced by the method with a hollow cylindrical contact area for contacting a corresponding pin contact and a connection area for connecting an electrical conductor.
  • the preparation of the contact elements extensively used in practice is usually carried out by machining a round rod used as a starting material, wherein the contact blades of the socket contacts are made by removing the material webs between the individual contact blades by means of a disc milling cutter. Subsequently, the resulting contact blades of the socket contact are pressed slightly inwards to produce the required spring force.
  • This type of making a socket contact is very time consuming, so that the resulting reduced productivity of the manufacturing equipment leads to an increase in the cost of each socket contacts.
  • the socket contact is assembled from two components, namely a sleeve closed on one side and a resilient lamella basket, which is inserted into the sleeve and secured thereto.
  • the electrical and mechanical contacting of a corresponding pin contact takes place via the contact lamellae of the lamellar cage, which for this purpose has an inwardly bent contact area.
  • Such a socket contact is known from DE 10 2012 001 560 AI.
  • the lamellar basket which is partially arranged inside the sleeve, is bent over the front end of the sleeve onto the outside of the sleeve and fixed to an attachment point.
  • An adjustment of the spring force of the lamella basket can be done in the preparation of the socket contact on the choice of the distance of the attachment point from the front end of the sleeve. The farther the attachment point is from the front end, the lower the spring force of the lamella basket.
  • the lamella basket itself is made by punching out of a spring strip and then bending the contact blades.
  • the disadvantage here however, that through the use of two components, the production of the socket contact is complex and therefore expensive.
  • the socket contact is relatively bulky due to the combination of the two components, so that it is unsuitable for compact plug.
  • an electrical connection device which consists of three parts, namely a plurality of contact blades having resilient plug contact, a sleeve-shaped receptacle which can be connected to an electrical conductor by crimping, and a retaining sleeve, for locking the connection device in a corresponding mating connector.
  • the stamped out of a sheet and bent resilient plug contact is permanently connected via a rivet connection with the sleeve-shaped receptacle.
  • the fact that the plug contact, the receptacle and the retaining sleeve are made of different materials, these can each be optimally adapted to their respective purpose. However, this advantage is paid for by the increased complexity and the associated costs in the production of the contact element.
  • DE 10 2010 020 346 A discloses electrical contact elements in the form of pin and socket contacts, each having a crimp connection as a connection region for connecting an electrical conductor.
  • the connection area is shaped as a hollow cylinder which has a slot in the axial direction.
  • the contact area is formed by a hollow cylinder, in which wedge-shaped slots are introduced, so that individual spring arms are formed, which serve for contacting an inserted pin contact.
  • the present invention has for its object to provide a method for producing a socket contact from a round rod, by which the production time is reduced, so that the productivity can be increased in particular in the mechanical production of socket contacts.
  • a socket contact should be specified, which can be easily and thus also inexpensively manufactured.
  • the hollow-cylindrical contacting region having contact blades extending in the longitudinal direction of the contacting region, which are separated from one another in the circumferential direction of the hollow-cylindrical contacting region by recesses, the recesses being produced during extrusion.
  • the method according to the invention is initially distinguished by the fact that, instead of a cutting production, a forming production by means of extrusion is provided.
  • the individual contact blades are not produced by machining operations such as milling or sawing but by forming during extrusion.
  • machining operations such as milling or sawing
  • the socket contact in its microstructure can be better prepared for the future load case.
  • a more favorable fiber layer is produced in the socket contact than is the case in the case of machining of a hollow cylindrical contacting region.
  • the spring property of Maisianss Kunststoffes is improved.
  • compressive residual stresses are introduced into the material as a result of the pressing, as a result of which the spring action of the contact blades is further increased. is being improved.
  • internal compressive stresses in metals have a corrosion-inhibiting effect, which is also advantageous in the case of contact elements.
  • the production time for making a socket contact can be significantly reduced.
  • d. H The number of socket contacts made within a certain time can be increased many times compared to the production of socket contacts on a turning or milling machine. Due to the fact that the production method according to the invention is a non-cutting production method, the material utilization is considerably increased since the starting material is utilized up to 100%. In addition to the lower production time, the material utilization is thus significantly increased in the method according to the invention, so that the individual socket contacts can be manufactured at a lower cost.
  • the preparation of the hollow cylindrical contacting region is preferably carried out by means of forward extrusion or backward extrusion without prior heating of the round rod as the starting material.
  • the advantage of cold extrusion is the high dimensional accuracy and the high surface quality of the component produced in this way, so that reworking of the socket contacts produced according to the invention is generally unnecessary. After being ejected from the forming press, the socket contacts thus produced must at most be provided with a coating, but otherwise no longer be processed.
  • the round bar In the case of forward extrusion, the round bar is pressed with its first end into a die by means of back-applied stamping pressure.
  • the die which is fixed during the forming process, has the negative mold of the desired hollow-cylindrical contacting area, with the die and the material moving in the same direction of movement in the case of extrusion molding.
  • a die having the negative mold of the desired bonding area penetrates the round rod at the first end.
  • the material is displaced so that it flows in the cavities formed in the punch in the opposite direction to the direction of movement of the punch.
  • the material used for the round rod is preferably used in the method according to the invention is copper or a copper-based alloy, in particular forming brass, which unlike Zerhardsmessing contains no lead. Lead, while facilitating the cutting of the round bar, degrades the forming properties. In addition, the absence of lead improves the conductivity of the brass or brass alloy used.
  • brass with a zinc content of at most 36%, preferably less is suitable since then both the conductivity and the cold formability have good values.
  • the contact blades or a front portion of the contact blades are displaced by forming parallel to the central axis of the socket contact inwards.
  • the contact blades or their free ends are usually turned inwards, so that the contacting region has a tapered front portion.
  • This configuration of the contacting region leads to substantially point-shaped contact areas, whereby the maximum current carrying capacity is limited.
  • the contact lamellae or a front section of the contact lamellae are offset parallel to the inside, then linear contact areas arise between the contact lamellae of the socket contact and a corresponding pin contact inserted in the contact area, which leads to a higher current carrying capacity.
  • the parallel displacement of the contact blades can be generated directly during the Umformeischen production of Kunststofftechniks Kunststoffes by extrusion, so that additional manufacturing steps, especially those requiring a change of the tool or a re-clamping of the workpiece can be waived.
  • the parallel offset of the front sections of the contact lamellae or of the contact lamellae can also be effected overall by compression molding of the sections or the contact lamellae after the actual production of the contact lamellae. Again, a re-clamping of the workpiece, ie the socket contact, not required, so that the additional time required is low.
  • connection region which is located at the second end of the socket contact, ie at the end facing away from the contacting region.
  • a connection region is preferably produced in a first method step by means of extrusion.
  • the connection region is preferably formed as a hollow cylinder, wherein the connection region is then a crimp connection.
  • connection area in the first method step, d. H.
  • connection area can then be used in the production of hollow cylindrical contacting area for receiving a punch or counter bearing in the forward extrusion or reverse extrusion.
  • a funnel-shaped collar is preferably formed at the outer end of the connection region by widening in a further method step.
  • the formation of a funnel-shaped collar facilitates the insertion of a conductor into the connection area.
  • the formation of an enlarged, funnel-shaped collar also makes it possible that with an insulated conductor, the end of the conductor insulation protrudes into the collar, while the stripped conductor or the stripped strands are inserted in the hollow cylindrical connection region. As a result, damage to the conductor or strands at the outer end of the connection area can be prevented.
  • the forming process is used to change the strength of the material of the round rod so that the strength in the contact area is higher than in the connection area when manufactured female contact.
  • the solidification of the material during cold extrusion is thus used to achieve different strengths adapted to the respective task in the different areas of the socket contact. If the socket contact in the connection If the strength is lower, this leads to an increase in the residual deformability in this region, which proves to be advantageous, in particular in the case of a connection region designed as a crimp connection.
  • An increased strength in the contacting area leads to an improved contact force of the contact blades.
  • a socket contact having a hollow-cylindrical contacting region and a connecting region described in the introduction, in that the hollow-cylindrical contacting region has contact lamellae extending in the longitudinal direction of the contacting region, said contact lamella being in the circumferential direction of the contacting region which have been produced in the forming process are separated from each other.
  • Such a socket contact can be produced particularly easily with the method according to the invention.
  • the contact blades or a front portion of the contact blades are offset inwardly parallel to the central axis of the socket contact.
  • An inwardly offset front portion of the contact blades then represents the region of the contact blades, with which they contact a plugged into the contact area of the socket contact pin contact. Due to the parallel offset, a line-shaped contact region is realized, so that the contacting region has a higher current-carrying capacity in comparison to contact blades with a point-shaped contacting region.
  • a solid central region is formed between the hollow-cylindrical contacting region and the hollow-cylindrical connecting region.
  • This massive central region preferably extends over at least 25% of the total length of the finished female contact.
  • the extent of the central region is preferably approximately the same size as the extension of the connection region, while the contacting region preferably has a slightly greater extent than the central region or the connection region.
  • Fig. 1 is a perspective view of an inventive
  • Fig. 3 shows a longitudinal section through a socket contact of FIG. 2, with marked fiber layer
  • Fig. 4 shows schematically several intermediate steps in the manufacture of a socket contact according to the invention.
  • FIG. 1 shows a perspective view of a socket contact 1 according to the invention.
  • a hollow-cylindrical contacting region 2 has been produced at a first end 3 of the socket contact 1 by means of extrusion.
  • the hollow-cylindrical contacting region 2 has contact lamellae 4 which extend in the longitudinal direction L and which are separated from one another in the circumferential direction of the hollow-cylindrical contacting region 2 by recesses 5.
  • the front portion 6 of the contact blades 4 is offset inwardly parallel to the central axis A of the socket contact 1, so that a pin contact inserted into the contacting region 2 of the socket contact 1 is contacted by these front portions 6.
  • connection region 8 is formed as a hollow-cylindrical crimp connection at the second end 7 of the socket contact 1, wherein the connection region 8 has also been produced by extrusion.
  • the connection region 8 has at its outer end a funnel-shaped collar 9 which has been produced by widening the connection region 8.
  • the socket contact 1 additionally also has a solid center region 10, which is formed between the hollow-cylindrical contacting region 2 and the hollow-cylindrical connection region 8.
  • a stop 11 is formed, which can serve as a stop for fastening the socket contact 1 in a housing wall or a support plate.
  • Fig. 3 shows a longitudinal section through the socket contact 1, similar to Fig. 2, in which case additionally the resulting by the forming production of the socket contact 1, changed fiber layer is indicated by corresponding lines 12.
  • the changed by the forming process fiber layer has a positive effect on the spring property of the contact blades 4, which leads to an increased contact force, with a introduced into the contacting 2 pin contact is contacted.
  • FIG. 4 shows various steps in the production of the socket contact 1 from a solid rod 13 as the starting workpiece.
  • a first punch 14 is pressed on the second end 7 in the round rod 13, whereby the material of the round rod 13 is displaced so that it flows opposite to the direction of movement of the punch 14.
  • the hollow cylindrical connection region 8 is produced.
  • the outer end of the hollow cylindrical connection portion 8 is widened, whereby the funnel-shaped collar 9 is formed.
  • a second punch 15 is inserted at the first end 3 in FIG the round rod 2 is pressed.
  • the second punch 15 has the negative form of the desired contacting region 2, for which purpose corresponding webs 16 and recesses 17 formed between the webs 16 are provided on the punch 15.
  • the recesses 5 are generated in the contact michs Scheme 2, while the thereby displaced material of the round rod 13 opposite to the direction of movement of the punch 15 flows into the recesses 17, whereby the contact blades 4 of the socket contact 1 are produced.
  • the front portions 6 of the contact blades 4 are displaced or pressed inward by compression molding parallel to the central axis of the socket contact 1.
  • the socket contact 1 is finished and can be provided with a coating if required.
  • the front sections 6 of the contact lamellae 4 can also be displaced inward during the extrusion of the contacting region 2 parallel to the central axis of the socket contact 1. This is possible, for example, in that the contacting region 2 is produced by forward extrusion and in the process the die into which the round rod 13 is pressed has, on its output side, an opening with a correspondingly smaller diameter. When the front portions 6 are pressed into this area of the opening in the die, the desired parallel offset of the front portions 6 of the contact blades 4 occurs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Abstract

L'invention concerne un contact femelle (1) ainsi qu'un procédé de fabrication d'un contact femelle (1) à partir d'une barre ronde (13), ledit procédé présentant l'étape suivante : • fabrication d'une zone de mise en contact cylindrique creuse (2) à une première extrémité (3) de la barre ronde (13) par extrusion, la zone de mise en contact cylindrique creuse (2) présentant des lamelles de contact (4) s'étendant dans la direction longitudinale (L) de la zone de mise en contact (2) et séparées les unes des autres par des évidements (5) dans la direction circonférentielle de la zone de mise en contact cylindrique creuse (2), les évidements (5) étant produits lors de l'extrusion.
EP17808946.2A 2016-12-09 2017-12-06 Procédé de fabrication d'un contact femelle Active EP3552273B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016123936.4A DE102016123936B4 (de) 2016-12-09 2016-12-09 Verfahren zur Herstellung eines Buchsenkontaktes
PCT/EP2017/081672 WO2018104381A1 (fr) 2016-12-09 2017-12-06 Procédé de fabrication d'un contact femelle

Publications (2)

Publication Number Publication Date
EP3552273A1 true EP3552273A1 (fr) 2019-10-16
EP3552273B1 EP3552273B1 (fr) 2024-03-06

Family

ID=60574623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17808946.2A Active EP3552273B1 (fr) 2016-12-09 2017-12-06 Procédé de fabrication d'un contact femelle

Country Status (5)

Country Link
EP (1) EP3552273B1 (fr)
CN (1) CN110050390B (fr)
DE (1) DE102016123936B4 (fr)
PL (1) PL3552273T3 (fr)
WO (1) WO2018104381A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202018104958U1 (de) * 2018-08-30 2018-09-12 Harting Electric Gmbh & Co. Kg Steckverbinder mit Komponenten aus verbessertem Material
CN119867441B (zh) * 2024-12-27 2025-11-18 苏州海明包装科技有限公司 一种收缩式刷杆卡点自动成型装置

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Also Published As

Publication number Publication date
PL3552273T3 (pl) 2024-06-24
DE102016123936A1 (de) 2018-06-14
CN110050390B (zh) 2021-07-06
EP3552273B1 (fr) 2024-03-06
CN110050390A (zh) 2019-07-23
WO2018104381A1 (fr) 2018-06-14
DE102016123936B4 (de) 2020-04-16

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