US3098517A - Connector crimping die set - Google Patents

Connector crimping die set Download PDF

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Publication number
US3098517A
US3098517A US13778A US1377860A US3098517A US 3098517 A US3098517 A US 3098517A US 13778 A US13778 A US 13778A US 1377860 A US1377860 A US 1377860A US 3098517 A US3098517 A US 3098517A
Authority
US
United States
Prior art keywords
crimping
anvil
die
recess
terminal
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 - Lifetime
Application number
US13778A
Other languages
English (en)
Inventor
Dale R Zell
Jr John A Zimmerman
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.)
TE Connectivity Corp
Original Assignee
AMP Inc
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
Priority to NL120485D priority Critical patent/NL120485C/xx
Application filed by AMP Inc filed Critical AMP Inc
Priority to US13778A priority patent/US3098517A/en
Priority to GB7638/61A priority patent/GB907370A/en
Priority to DEA36870A priority patent/DE1128901B/de
Priority to BE600977A priority patent/BE600977A/fr
Priority to FR854863A priority patent/FR1283032A/fr
Priority to CH279861A priority patent/CH390344A/de
Application granted granted Critical
Publication of US3098517A publication Critical patent/US3098517A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01R4/10—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/20—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve
    • 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
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/058—Crimping mandrels
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube
    • Y10T29/49929—Joined to rod

Definitions

  • This invention relates to crimping devices for electrical terminals and connectors.
  • One known form of crimping die set for electrical connectors comprises a first crimping die having a recess therein with convergent surfaces and a second crimping die or anvil movable relatively into the recess. Upon movement of the anvil into the crimping die, the terminal is compressed and crimped onto a wire positioned in the terminal.
  • the crimps formed by this type of die set are classified as confined crimps for the reason that the connector ferrule is intended to be completely circumferentially confined during at least the final stages of crimping.
  • the flow stress of the metal of the connector i.e. the stress required to cause plastic deformation
  • the metal of the connector tends to be extraded in those areas where it is not confined against extrusion.
  • the metal of the ferrule may, and frequently does, fiow axially so that the ferrule is lengthened as well as intended and/ or flattened by the crimping operation. This axial flow is an expected phenomenon and is not necessarily regarded as being harmful.
  • the metal of the ferrule may also flow through this gap to produce extruded flanges on the ferrule after crimping. It should also be mentioned that with some connector ferrules having relatively thin walls, the ferrule wall may be sheared by the lateral edges of the anvil before it is completely confined within the recess by the crimping anvil.
  • the crimping die and anvil are made to very precise dimensional tolerances and the connector ferrule is also carefully matched dimensionally to the particular die set being used for crimping to avoid extrusion.
  • the dies and the ferrule are formed in a manner such that the flow stress (or shear stress) of the metal of the ferrule is not imposed upon the ferrule until it has been completely ciroumferentially confined by closure of the gap between the crimping dies so that no undesirable radial extrusion or shearing can take place.
  • the anvil is medially slotted so that its upper portions are divided into two separate fingers.
  • these fingers are so formed that they diverge and are slightly flexible towards each other and towards the medial plane of the slot.
  • the lateral edges of these fingers come into contact with the opposed convergent surfaces of the recess in the die and are cammed and flexed towards each other whereby they are maintained in close engagement with the surfaces of the crimping die.
  • the crimping anvil is so dimensioned relative to the width of the recess in the die that the edges of the fingers come into contact with the sides of the recess before substantial crimping of the terminal begins so that during most of the crimping operation, the fingers are resiliently pressed against the opposed surfaces of the die recess.
  • FIGURE 1 is a frontal view of a die set in accordance with a preferred embodiment of the invention.
  • FIGURES 2 and 3 are views showing the crimping operation with the embodiment of FIGURE 1;
  • FIGURES 4, 5 and 6 are views similar to FIGURES l, 2 and 3 but showing an alternative embodiment
  • FIGURE 7 is a frontal view of a conventional prior art type of die set intended to perform the same type of crimping operation as the embodiments of FIGURES 1 and 4;
  • FIGURE 8 is a view showing the dies of FIGURE 7 in the closed condition at the end of a crimping operation
  • FIGURE 9 is a sectional view of a crimped connection formed in accordance with the prior art teachings and by a die set of the type shown in FIGURES 7 and 8 and illustrating the extrusion effects sometimes obtained;
  • FIGURE 10 is a view of a crimped connection showing the shearing effect which is sometimes obtained with prior art die sets.
  • FIGURES 7-10 wherein the reference numeral 2 denotes a crimping die having a recess with convergent surfaces 6 which curve towards each other and merge with each other as shown at 8.
  • the anvil block 20' has a crimping anvil 22 extending therefrom which provides an arcuate upper surface 24 adapted to receive the ferrule 10 of an electrical connector into which a conductor 12 has been inserted.
  • the anvil 22 should be of a width such that extrusion of the metal of the ferrule 10 into the gap between the lateral edges 26 of the anvil and the surfaces 6 of the recess cannot take place.
  • FIGURE 8 illustrates a condition which also arises with dies of the type shown in FIGURES 7 and 8 Where a gap is left between the edges of the anvil and the opposed surfaces of the crimping die.
  • Crimped connections as shown in FIGURE 10 are sometimes obtained if the ferrule has a relatively thin wall rather than a comparatively thick wall and the ferrule is sheared at 27 by the lateral edges of the anvil during the initial stages of crimping.
  • the results shown in FIGURES 9 and 10 are undesirable for a number of reasons. For example, in both instances an undesirable and useless projection on the ferrule is produced which may interfere with the usage of the crimped connection in some environments where space limitations are of importance such as where the connector is of the pin and socket type and is adapted to be used in a dielectric connector block having a plurality of relatively closely spaced openings for the connectors. Furthermore, the conditions shown in FIGURES 9 and 10 result in a weakening of the connector ferrule.
  • FIGURE 1 shows one embodiment of the instant invention in which the condition shown in FIGURES 9 and 10 are avoided.
  • the upper crimping die 2 is formed as is the die 2 of FIGURE 7.
  • the lower die block 4 has an anvil 13 extending therefrom which is medially slotted as shown at 14 to form a pair of fingers 15 which in this embodiment diverge slightly from each other and from the center line of the die set.
  • the anvil projection 13 may be initially formed (e.g. by milling, investment casting or any other suitable method) with divergent sidewalls 17 so that after the slot 14 is cut the fingers will diverge from each other.
  • the anvil projection 13 may have straight sidewalls as formed and, after the slot 14 has been cut, the two fingers 15 may be permanently deformed by being spread apart.
  • the upper surfaces 16 of the fingers are of arcuate form and provide edges 18 extending along the sides of the die at the tops of the sidewalls.
  • the width of the upper portion of the anvil projection 13 (the distance between the edges 18 of the fingers) should be such that when the anvil is moved relatively into the recess of the crimping die, these edges will come into contact with the convergent surfaces 6 prior to the imposition of any substantial compressive force on the ferrule 10 of the termihad.
  • the fingers 15 are cammed relatively towards each other to permit the die parts to move together.
  • FIGURE 4 shows an alternative embodiment of the invention in which corresponding parts with reference to the embodiment of FIGURE 1 are identified by similar reference numerals but differentiated by prime marks.
  • the anvil projection 13" has straight and panailel, rather than divergent sidewalls so that when the ferrule is compressed between the surfaces 16 of the fin gers and the portion 8 of the recess, the transmitted compressive forces urge the two fingers apart and against the sidewalls 6 of the crimping die.
  • the anvil 13" of the embodiment of FIGURE 4 would ordinarily be movable almost to the end of the recess in the crimping die '2. but that the fingers are spread by the terminal. This spreading of the fingers is a result of the fact that the forces transmitted through the ferrule are transmitted normally with respect to the surfaces 16' of the anvil.
  • the wire 12 is shown as having an insulating sheath 1-1 thereover while in the embodiment of FIGURES 4-6 the wire is shown as being uninsul ated.
  • Both embodirments can be used with either insulated or uninsulated wires and the showing of the drawing is not intended as being limiting of the invention.
  • Bot-h embodiments of the invention rely upon the principle of deforming the crimping anvil to bring the sides or edges thereof into engagement with the opposed surfaces of the crimping die thereby to confine the terminal during the crimping operation. It has been found in practice that in the case of die sets adapted to crimp relatively small terminals, the fingers of the anvil can be formed with sufii'cient resilience and flexibility to permit the movement as shown in FIGURES l6 of the drawing. It is feasible, where the die set is intended for larger size terminals, to form two parallel slats to form three fingers, the center finger being immobile during crimping While the outer fingers would deflect to adapt the anvil to the die as with the disclosed embodiments.
  • anvil in two separate parts normally spring biased apart but movable relatively towards each other as in FIGURE 1 or normally biased towards each other by a separate spring but movable apart when an axial load is imposed as in FIGURE 4.
  • a principal advantage of the invention is that anvils and crimping dies can be manufactured, panticularly in relatively small sizes, without the necessity of rigidly adhering to extremely precise, or close, dimensional tolerances and/or imposing equally precise tolerances on the terminals crirnped by the tool.
  • the manufacturing tolerances can be relaxed substantially and the advantages of complete peripheral confinement of the terminal will still be obtained.
  • a crimping die set for crimping electrical terminals onto the ends of wires comprising, a crimping die and a crimping anvil, said die having a recess with opposed convergent surfaces for reception of an uncrimped terminal, the depth of said recess being substantially greater than the diameter :of the uncrimped terminal, said anvil being adapted to enter said die recess to crimp said terminal by a confined crimp, said anvil having a relatively deep slot extending thereacross parallel to the axis thereof, said slot dividing said ranvil into two fingers, said fingers being movable by flexure with respect to each other and into engagement with said convergent surfaces during crimping whereby said terminal is substantially completely circumferentially confined against radial extrusion.
  • a crimping die set for crimping electrical connectors onto the ends of wires with a confined crimp comprising, a crimping die having a recess therein with opposed convergent surfaces, the depth of said recess being substantially greater than the diameter of the uncrimped terminal, a crimping anvil mounted for movement into said recess, said anvil being fiormed of a pair of divergent fingers, said fingers having side edges engageable with said convergent surfaces of said recess upon movement of said anvil into said recess whereby said fingers are cammed towards each other and are maintained against said convergent surfaces, and said terminal is substantially completely circumferentially confined against radial extrusion during crimping.
  • Means for crimping electrical connectors onto the ends of wires by a confined crimp comprising, a crimping die and a crimping anvil, said crimping die having a recess with convergent surfaces, the depth of said recess being substantially greater than the diameter of the uncrimped terminal, said anvil being relatively movable into said recess to compress and crimp a terminal, a relatively deep slot in said anvil extending axially thereacross, said slot dividing said anvil into two sections which are re siliently movable by flexure relatively towards and away from each other, the normal distance between the extreme lateral edges of said two sections being greater than the distance between said convergent surfaces at the location in said recess where a terminal is initially compressed between said crimping die and said anvil whereby, upon movement of said anvil into said recess, said lateral edges engage said surfaces concomitantly with initial compression of said terminal, and during further movement of said anvil, said sections are
  • a crimping die set for crimping electrical connectors onto the ends of wires with a confined crimp comprising, a crimping die having a recess therein with opposed convergent surfaces, the depth of said recess being substantially greater than the diameter 10f the uncrimped terminal, a crimping anvil mounted for movement into said recess, said anvil being formed of a pair of fingers movable by flexure away from each other upon application of forces against their terminal engaging surfaces, the normal distance between the extreme lateral edges of said fingers being less than the distance between said convergent surfaces at the location in said recess where a terminal is initially compressed in a crimping operation between said crimping die and said anvil whereby, upon movement of said anvil into said recess, said fingers are spread apart by forces transmitted through the terminal being cn'mped at the outset of crimping thereby to form with said convergent surfaces a substantially complete circumferential enclosure for said terminal whereby radial ex

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
US13778A 1960-03-09 1960-03-09 Connector crimping die set Expired - Lifetime US3098517A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL120485D NL120485C (en)) 1960-03-09
US13778A US3098517A (en) 1960-03-09 1960-03-09 Connector crimping die set
GB7638/61A GB907370A (en) 1960-03-09 1961-03-02 Improvements in or relating to die sets for crimping electrical connector ferrules onto electrical conductors
DEA36870A DE1128901B (de) 1960-03-09 1961-03-02 Gesenk zum Andruecken von Verbindungsklemmen
BE600977A BE600977A (fr) 1960-03-09 1961-03-06 Outils sertisseurs
FR854863A FR1283032A (fr) 1960-03-09 1961-03-07 Outils sertisseurs
CH279861A CH390344A (de) 1960-03-09 1961-03-08 Gesenk zum Andrücken einer elektrischen Verbindungsklemme an einen elektrischen Leiter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13778A US3098517A (en) 1960-03-09 1960-03-09 Connector crimping die set

Publications (1)

Publication Number Publication Date
US3098517A true US3098517A (en) 1963-07-23

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Application Number Title Priority Date Filing Date
US13778A Expired - Lifetime US3098517A (en) 1960-03-09 1960-03-09 Connector crimping die set

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US (1) US3098517A (en))
BE (1) BE600977A (en))
CH (1) CH390344A (en))
DE (1) DE1128901B (en))
GB (1) GB907370A (en))
NL (1) NL120485C (en))

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4828516A (en) * 1983-12-30 1989-05-09 Amp Incorporated Crimped electrical connection and crimping dies therefore
US4890384A (en) * 1988-08-25 1990-01-02 Amp Incorporated Method of crimping an electrical connection
US4976132A (en) * 1983-12-30 1990-12-11 Amp Incorporated Dies for crimping an electrical connection
US4991289A (en) * 1989-06-23 1991-02-12 Amp Incorporated Crimping die and crimped electrical connection therefrom
EP1267457A3 (en) * 2001-06-13 2003-05-07 Yazaki Corporation Terminal crimping dies
US7409847B2 (en) 2006-12-14 2008-08-12 Intelligent Design Group, Inc. Method and apparatus for securing connecting ferrules
US20110302763A1 (en) * 2009-03-16 2011-12-15 Klaus Kaufmann Device for attaching a line to a connecting element
US20160111842A1 (en) * 2011-07-26 2016-04-21 Sumitomo Wiring Systems, Ltd. Crimping die and method for manufacturing terminal-fitted wire
US9543727B2 (en) 2014-08-29 2017-01-10 Hubbell Incorporated Nest dies, indent crimp die sets, and crimp tools having such die sets
WO2018172452A1 (en) * 2017-03-22 2018-09-27 Te Connectivity Germany Gmbh A crimping tool, a method for establishing an insulation crimp and a crimping machine
US20180318897A1 (en) * 2015-11-12 2018-11-08 Sumitomo Wiring Systems, Ltd. Method of manufacturing band-shaped metal wire member including bonded portion, method of manufacturing terminal-equipped band-shaped metal wire member, die, and band-shaped metal wire member including bonded portion
US10181691B2 (en) * 2015-10-21 2019-01-15 Autonetworks Technologies, Ltd. Production method for terminal-equipped electrical wire, crimp tool, and terminal-equipped electrical wire
US10411429B2 (en) * 2015-11-12 2019-09-10 Sumitomo Wiring Systems, Ltd. Production method for conductive member, conductive member, and mold
US10431950B2 (en) 2014-02-18 2019-10-01 Hubbell Incorporated Smart conductor/connector selecting die
US11394165B2 (en) 2017-06-29 2022-07-19 Hubbell Incorporated Repositionable tool die
USD985029S1 (en) * 2019-06-27 2023-05-02 Barsplice Products, Inc. Cold-swaging die set with tubular splice sleeve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US365251A (en) * 1887-06-21 Signoes
US2438023A (en) * 1943-09-15 1948-03-16 Western Electric Co Apparatus for cutting wires and forming and attaching a sleeve thereto
US2592276A (en) * 1945-01-11 1952-04-08 Western Electric Co Article assembling apparatus
US2837135A (en) * 1953-11-03 1958-06-03 Amp Inc Rotary turret head for crimping tools

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US365251A (en) * 1887-06-21 Signoes
US2438023A (en) * 1943-09-15 1948-03-16 Western Electric Co Apparatus for cutting wires and forming and attaching a sleeve thereto
US2592276A (en) * 1945-01-11 1952-04-08 Western Electric Co Article assembling apparatus
US2837135A (en) * 1953-11-03 1958-06-03 Amp Inc Rotary turret head for crimping tools

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4976132A (en) * 1983-12-30 1990-12-11 Amp Incorporated Dies for crimping an electrical connection
US4828516A (en) * 1983-12-30 1989-05-09 Amp Incorporated Crimped electrical connection and crimping dies therefore
US4890384A (en) * 1988-08-25 1990-01-02 Amp Incorporated Method of crimping an electrical connection
US4991289A (en) * 1989-06-23 1991-02-12 Amp Incorporated Crimping die and crimped electrical connection therefrom
EP1267457A3 (en) * 2001-06-13 2003-05-07 Yazaki Corporation Terminal crimping dies
US6813826B2 (en) 2001-06-13 2004-11-09 Yazaki Corporation Terminal crimping dies
US7409847B2 (en) 2006-12-14 2008-08-12 Intelligent Design Group, Inc. Method and apparatus for securing connecting ferrules
US20110302763A1 (en) * 2009-03-16 2011-12-15 Klaus Kaufmann Device for attaching a line to a connecting element
US8813341B2 (en) * 2009-03-16 2014-08-26 Delphi Technologies, Inc. Device for attaching a line to a connecting element
US20160111842A1 (en) * 2011-07-26 2016-04-21 Sumitomo Wiring Systems, Ltd. Crimping die and method for manufacturing terminal-fitted wire
US9698553B2 (en) * 2011-07-26 2017-07-04 Sumitomo Wiring Systems, Ltd. Method for manufacturing terminal-fitted wire
US10431950B2 (en) 2014-02-18 2019-10-01 Hubbell Incorporated Smart conductor/connector selecting die
US9543727B2 (en) 2014-08-29 2017-01-10 Hubbell Incorporated Nest dies, indent crimp die sets, and crimp tools having such die sets
US10181691B2 (en) * 2015-10-21 2019-01-15 Autonetworks Technologies, Ltd. Production method for terminal-equipped electrical wire, crimp tool, and terminal-equipped electrical wire
US20180318897A1 (en) * 2015-11-12 2018-11-08 Sumitomo Wiring Systems, Ltd. Method of manufacturing band-shaped metal wire member including bonded portion, method of manufacturing terminal-equipped band-shaped metal wire member, die, and band-shaped metal wire member including bonded portion
US10411429B2 (en) * 2015-11-12 2019-09-10 Sumitomo Wiring Systems, Ltd. Production method for conductive member, conductive member, and mold
US10919079B2 (en) * 2015-11-12 2021-02-16 Sumitomo Wiring Systems, Ltd. Method of manufacturing band-shaped metal wire member including bonded portion
WO2018172452A1 (en) * 2017-03-22 2018-09-27 Te Connectivity Germany Gmbh A crimping tool, a method for establishing an insulation crimp and a crimping machine
US11394165B2 (en) 2017-06-29 2022-07-19 Hubbell Incorporated Repositionable tool die
USD985029S1 (en) * 2019-06-27 2023-05-02 Barsplice Products, Inc. Cold-swaging die set with tubular splice sleeve

Also Published As

Publication number Publication date
CH390344A (de) 1965-04-15
BE600977A (fr) 1961-09-06
DE1128901B (de) 1962-05-03
GB907370A (en) 1962-10-03
NL120485C (en))

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