US3063313A - Locator controlled crimping tool - Google Patents

Locator controlled crimping tool Download PDF

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Publication number
US3063313A
US3063313A US843253A US84325359A US3063313A US 3063313 A US3063313 A US 3063313A US 843253 A US843253 A US 843253A US 84325359 A US84325359 A US 84325359A US 3063313 A US3063313 A US 3063313A
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Prior art keywords
locator
crimping
workpiece
dieholder
bore
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Expired - Lifetime
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US843253A
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Ustin George
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Buchanan Electrical Products Corp
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Buchanan Electrical Products Corp
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Priority to US843253A priority Critical patent/US3063313A/en
Priority to GB32735/60A priority patent/GB947490A/en
Priority to FR839554A priority patent/FR1268289A/en
Priority to DEB59574A priority patent/DE1156463B/en
Application granted granted Critical
Publication of US3063313A publication Critical patent/US3063313A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • 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
    • H01R43/042—Hand tools for crimping
    • H01R43/0424—Hand tools for crimping with more than two radially actuated 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 tools and particularly to an improved constructon 'for crimping tools adapted for symmetrical controlled crimping of electrical contacts, terminals and similar electrical assemblies.
  • Crimping tools of the ygeneral type herein of concern which incorporate a bored dieholder rigidly -mounted in a carrier member, a plurality of radially disposed crimping dies reciprocably mounted therein and an associated operating member having a cammed die member actuating surface mounted for rotative displacement relative to the dieholder and carrier member are disclosed in my copending application Serial No. 772,878, namelyd November l0, 1958, now United States Patent No. 2,991,675.
  • crimping tools of the type herein of concern it is highly desirable to provide for accommodation and proper positioning of various sizes and types of Work pieces and ready adjustment of crimp depth within predetermined limits together with an associated full cycling mechanism to insure that, once a crimping operation has been initiated upon a work piece, a full operating cycle must be completed before initiation of a succeeding operation.
  • the crimping tool structures disclosed in the above identified application provide for the proper positioning of various sizes of work pieces by utilization of replaceable locator assemblies associated with the work piece receiving bore in the dieholder and provide for adjustment of crimp depth and concomitant control of the full cycling mechanism by means of a pawl and ratchet assembly triggered by an adjustable stud or set screw assembly mounted at the ends of the carrier and operating members disposed remote from the dieholder.
  • a pawl and ratchet assembly triggered by an adjustable stud or set screw assembly mounted at the ends of the carrier and operating members disposed remote from the dieholder.
  • This invention may be briefly described as an improved construction for crimping tools of the general type indicated above.
  • the invention includes provision of novel structure in which selective utilization of a locator member automatically insures, in addition to proper positioning of a work piece, control of crimp depth and concomitant control of the full cycling mechanism.
  • the invention also includes an improved construction for a locator member to permit control of the crimp depth and the full cycling mechanism thereby.
  • Still another advantage of the herein described invention is the provision of a control locator construction that may be simply and inexpensively designed and fabricated in accordance with the dictates of a particular workpiece upon which a particular crimping operation is desired to be effected.
  • the primary object of this invention is the provision of an improved construction for crimping tools.
  • Another object of this invention is the provision of an improved crimping tool in which selective utilization of a locator, in accordance with the dictates of a workpiece, automatically insures proper workpiece positioning, control of crimp depth and control of a full cycling mechanism to assure completion of any initiated operation be ⁇ fore initiation of a subsequent operation.
  • Another object of this inventon is the provision of an' improved crimping tool so constructed as to preclude undesired adjustment thereof by an operator or unauthorized personnel.
  • Still another object of this invention is the provision of an improved construction for crimping tools that may be readily adapted for varying types of crimping operations upon many varying types of workpieces through selective utilization -of a particular locator member which vmay be readily and inexpensively designed and fabricated in accordance with the dictates of a particular workpiece upon which a particular crimping operation is desired to be effected.
  • a further object of this invention is the provision of an improved construction for a locator member to permit control of the crimp ydepth and a full cycling mechanism thereby in ⁇ addition to properly positioning a workpiece for the desired crimping operations.
  • FIGURE l is a plan view of a presently preferred construction for a crimping tool incorporating the principles of this invention
  • FIGURE 2 is a plan view, partly in section, of the tool illustrated in FIGURE 1;
  • FIGURE 3 is a sectional View taken on the line 3-3 of FIGURE l; v
  • FIGURE 4 is a partial plan view, partly in section, to illustrate the positioning of certain of the elements of the illustrated tool, at the initiation of a crimping operation;
  • FIGURE 5 is a side elevation of a presently preferred construction of a locator member;
  • FIGURE 6 is a bottom view o-f the locator member illustrated in FIGURE 5;
  • FIGURE 7 is a sectional view taken on the line 7-7 ⁇ of FIGURE 6;
  • FIGURE 8 is a side elevational view of a presently preferred construction of a crimping die
  • FIGURE 9 is a plan view of the crimping die illustrated in FIGURE 8.
  • a manually operable crimping tool which includes a generally disc-shaped dieholder or plunger body rigidly secured, as by bolts 12 and nuts 14, to the generally circularly shaped side portions 16, 18 of a generally channel or U-shaped carrier member 20.
  • the dieholder 10 is provided with a conically shaped workpiece entry aperture 22 inwardly terminating in an axially disposed work piece receiving bore 26 as defined -by an inwardly directed annular shoulder 24.
  • an enlarged locator member receiving bore 28 Disposed coaxially with and adjacent to the workpiece receiving bore 26 in the dieholder 10 is an enlarged locator member receiving bore 28.
  • the abutting side portion 18 of the carrier member 20 is provided with an enlarged circular workpiece entry aperture 30 disposed in coaxial alignment with the workpiece receiving bore 26.
  • the other side portion 16 of the carrier member 20 is provided with an enlarged locator receiving and positioning aperture 32 disposed in coaxial alignment with the axis of the locator receiving and positioning bore 28 in the dieholder 18.
  • the locator receiving and positioning aperture 32 in the side portion 16 is provided with a chordal fiat portion 34 in order to automatically assure proper positioning of a complementally shaped locator member introduceable therein.
  • the dieholder 10 is also provided with a plurality (specifically four in the illustrated embodiment) of radially disposed die member receiving bores 36 each having a crimping die or plunger member, generally designated 38, reciprocably mounted therein.
  • each of said die members 38 includes an elongate cylindrically shaped body portion 40 sized to be reciprocably contained within said bores 36.
  • the body portion 48 is provided -with an enlarged head portion 42 at one end thereof which incorporates an exposed cam surface 44.
  • the dependent end of the body portion 40 of the die members 38 includes an inwardly directed pair of aligned shoulders 46 disposed perpendicular to the longitudinal axis of the body portion 40 and defining a straight sided and generally rectangular dependent tip portion 48 that terminates in a crimping tooth 50.
  • the shoulders 46 cooperate to limit and thereby control the amount of die member advance.
  • a die or plunger member 38 of the type described immediately above is mounted in each of the radially disposed die member receiving bores 36 and is biased radially outwardly by a suitable biasing spring 52 disposed within the enlarged peripheral recesses 54 in the dieholder body 1t) and surrounding the body portion 40 beneath the head portion 42 thereof.
  • a suitable biasing spring 52 disposed within the enlarged peripheral recesses 54 in the dieholder body 1t
  • the cam surface containing portion 56 of an operating member generally designated 58.
  • the cam surface containing portion 56 of the operating member 58 is provided with a plurality of cam surfaces 60 engaging the outwardly biased cam surfaced head portions 42 of the individual die members 38.
  • cam surfaces 60 of the operating member 58 and the cam surfaced head portions 42 of the die members 38 are so designed and arranged that rotative displacement of the operating member 58 relative to the carrier member 20 and dieholder 1t) rigidly mounted therein results, for one direction of rotation, in a simultaneous inward displacement of the individual die members 38, against the action of the individual biasing springs 52, and convergence of the dependent crimping teeth thereof toward the longitudinal axis of the bores 26 and 28 and, for the other direction of rotation, in a permitted outward displacement of the die members 38 by the biasing springs 52.
  • the dieholder or plunger body 10 is provided with an enlarged bore 28 sized to receive and contain a locator member generally designated 68 in FIGURE 3.
  • the structure of the locator member 68 is illustrated in more detail in FIGURES 5-7.
  • the preferred construction thereof includes an elongate cylindrically shaped body portion 70 having an axially disposed bore 72.
  • the body portion 70 terminates in an outwardly extending peripheral flange 74 preferably having a beveled edge.
  • the iiange 74 is of generally circular configuration sized to be contained Within the receiving aperture 32 in the side plate 16 and is provided with a complemental chordal positioning flat 76 disposed at a predetermined portion of the periphery thereof sized to abut the aforementioned chordal tiat 34 forming a portion of the entry aperture 32. Disposed immediately beneath the extending flange 74 is a control surface in the form of an undercut circular recess 78. The lower shoulder 80 of the recess 78 serves to define a lower body portion, generally designated 82 in FIGURE 7.
  • the lower body portion 82 is externally shaped to provide a series of particularly located arcuate surfaces 84 and plane stop surfaces 86, respectively (see FIGURE 6) and is internally shaped to provide an enlarged bore 88 disposed coaxially with the bore 72. '.As best shown in FIGURE 6, the lower body portion 82 is provided with a plurality of cutout generally rectangular portions or passages (four in the specifically illustrated embodiment) intersecting the plane stop surfaces 86 to provide four uniformly positioned and spaced dependent leg portions 92.
  • each of the passages 90 is sized and positioned to receive and pass the tooth 50 and adjacent tip portion 48 of a die member 38 and to limit the converging advance thereof when the shoulders 46 of said die member 38 engage the flattened plane stop surfaces 86 disposed on either side of and defining the entry portion of each of said apertures 90.
  • the radial distance between the longitudinal axis of the bore 28 and the stop surfaces 86 will, for a given set of die members 38, control the amount of advance of the crimping teeth 50. It will also be apparent to those skilled in this art that the bores 88 and 72 may readily be sized and shaped to accommodate and properly position a workpiece of almost any configuration and that a particular locator member 68 may be fabricated to receive and properly position a given workpiece and to control, within extremely close tolerances, the depth of crimps made therein.
  • the lower body portion 82 of a control locator member 68 is adapted to be introduced into the locator receiving bore 28 of the dieholder 10.
  • Proper positioning of the locator member 68 and specifically the proper positioning of the passages 90 therein relative to the path of advance of the die members 38 is automatically attained by the disposition of the chordal positioning fiat 76 thereon in abutting relation with the complemental chordal fiat 34 ⁇ forming part of the locator entry aperture 32 in the side portion 16 of the carrier member Ztl.
  • the depth of locator insertion is controlled by disposition of the dependent ends of the locator leg portions 92 in abutting engagement with the inner surface of the shoulder 24 defining the terminus of the locator receiving bore 28.
  • auxiliary locator member retainer assembly mounted on the surface of the side portion 16 of the carrier member 20.
  • the auxiliary retainer assembly includes a forked manually displaceable slide member 96 disposed beneath a bridging retainer 98, The bridging retainer 98 is com veniently secured to the surface of the side portion 16 of the carrier member 20 by a pair of the nuts 12 and bolts 14 that are utilized to secure the dieholder ⁇ 10 thereto.
  • the displacement of forked slide 96 is guided and limited by means of a bolt 100 mounted thereon having its shaft disposed in a slot 102 in the bridging retainer 98.
  • the side portion 16 is apertured, as at 106, beneath the bolt 100 to ⁇ facilitate assembly.
  • the forked end 104 of .the slide 96 is shaped to engage and partially encircle the body portion 70 of the locator member 68 and to overlie the extending flange 74 thereof.
  • the retainer -assembly is preferably arranged so that the slide 96 may only be advanced when a locator member is properly positioned.
  • the slide 96 is manually advanced into overlying engagement with the fla-nge 74 and into partially encircling engagement with the body portion 78 of the inserted locator member 68.
  • the locator member 68 will be firmly fixed in proper position with the passages 90 therein properly disposed in the path of the radial advance of the crimping dies 38.
  • the operating member 58 is provided, as is conventional with manually operable crimping tools of this general type, with an extending handle portion 116- having an integral reinforcing rib l118 which merges with the cam surface containing portion 56 thereof.
  • the carrier member 20 is a-lso provided with an extending handle portion 120 of a generally U-shaped configuration having the side portions thereof joined by a ⁇ transverse web 122 (see FIGURE 2).
  • the handle portion-s 116 and 120 of the operating and carrier members may be provided with resilient hand grips 124, which may be made of insulating material.
  • the handle portion 1120 of the carrier member may be conveniently utilized to store a plurality of varying sizes of locator members, as indicated by the dotted lines 126.
  • the illustrated locator ⁇ structure also provides the necessary control of a yfull cycling mechanism to insure completion of the operations upon one workpiece before initiation of operations upon a subsequent workpiece.
  • the disclosed structure effects this desired result by insuring that once a crimping stroke is initiated, a full crimpingstroke, as determined by the engagement of the shoulders 46 of the crimping dies 38 with the stop surfaces 86 on the locator 68, must be performed.
  • a curved rack 130 pivotally mounted on the reinforcing rib 118 of the operating member 58 as by a rack pin 132.
  • the rack 130 is substantially U-shaped in cross-section, having a base 134 (see FIGURE 3) and a pair of upturned flanges 136 on ⁇ each side thereof.
  • the upper surfaces of the flanges 136 are suitably notched, as at 138, to provide a ratchet connection with an loverlying pawl 140 fonning a part of an associated pawl assembly.
  • the dependent ends of the flanges 136 are provided with upstanding tangs 142 to limit the separation of the handle members 116, l and also to reset the pawl 140 and associated pawl assembly, upon completion of a full cycle of operation as will be described in more detail hereinafter.
  • the illustrated pawl assembly includes the above mentioned pawl 149 mounted intermediate a pair of side plates 144.
  • the side plates 144 are pivotally mounted on a roller pin 146 which is terminally supported by the side portions of the U-shaped handle 120 of the carrier member 20.
  • the base 134 of the curved rack 1:36 rides on the roller pin 146 and is guided thereby during its hereinafter described movement.
  • the pawl assembly also includes an auxiliary tripping pin 148 also mounted intermediate the side plates 1414 beneath the rack 131i and which cooperates with the pawl 140 in maintaining the side plates 144 in uniform spaced relation externally adjacent the upstanding flanges 136 forming the rack 136.
  • the pawl assembly and pawl 141i/ are normally biased by a spring member 150 in a counter-clockwise direction (as viewed in FIGURES 2 and 4) to maintain the pawl 148 in contact with the notched flanges 136 to permit inward movement of the handles 116 and 128 and to prevent their outward movement.
  • the spring member 150 has one end connected to the tripping pin 148 of the side plates 144 and the other end thereof connected to the side wall 18 of the handle 120.
  • the illustrated trigger assembly includes a trigger plate member 154 pivotally mounted on a pin 156 terminally supported by the side portions of the extending handle 128 of the carrier member 20.
  • the trigger plate member 154 is provided with an extension 158 sized to engage the tripping pin 148 of the heretofore described pawl assembly upon counter-clockwise rotative displacement of the trigger plate member 154 about the pin 156.
  • the trigger assembly is normally biased in a clockwise direction (as viewed in FIGURES 2 and 4) by the weight of the extension 158 and is provided with a stop lug 151 engageable with the cam containing surface portion 56 of the operating member 58 to prevent over-displacement thereof upon tool inversion.
  • FIGURE 4 generally illustrates the positioning of the above described elements prior to the initiation of a. crimping stroke.
  • actuating member or trigger that is selectively, automatically and properly positioned by the locator member 68 so as to effect the necessary counterclockwise actuation of the trigger assembly and consequent rack release only upon cessation of die member advance.
  • actuating member or trigger mounted on the handle 116 of the operating member 58.
  • the slide 170 is provided with a dependent skirt 172 suitably slotted as at 174 to permit displacement thereof longitudinally of the handle 116 relative to the pin 132.
  • an extending link 1'76 sized to' be disposed in abutting relation with the surface of the locator member 68 by disposition of the end thereof within the control recess 78.
  • the link member 176 is maintained in abutting relationship with the surface of the: locator 68 by a biasing spring 178 mounted beneath the slide 17).
  • the dependent edge portion of the skirt 172i is contoured as at 186 to provide an actuating cam surface engageable with the trigger pin 152 forming a part of the trigger assembly.
  • the effective radius of the path of travel of the cam surface 180 is controlled by the spacing of the end of the link member 176 from the axis of the bores 26 and 28 in the dieholder 10, with such spacing being in turn controlled by the effective diameter of the engaged portion of the locator member 68.
  • the slide 17@ and the cam surface 180 on the skirt portion 172 thereof will be fixedly positioned relative to the trigger pin 152.
  • the displacement of the handle 116 in the direction indicated by the arrow 116a also causes the cam surface 180 on the skirt 172 to be advanced, in a generally arcuate path, towards and into engagement with the trigger pin 152.
  • a slight further advance of the cam surface 180 displaces the trigger pin 152 and effects a counter-clockwise rotation of the trigger plate 154 about the pivot pin 156, engagement of the tripping pin 148 by the trigger plate extension 158, and rotative clockwise displacement of the pawl assembly and consequent disengagement of the pawl 140 from the notched rack 130.
  • the spring member 166 Upon pawl disengagement as described above, the spring member 166 throws the rack 130 backwardly along its previous path of advance with a consequent separation of the handles 116 and 120 thereby assisting the crimping die springs 52 in effecting such handle separation.
  • the tangs 142 engage the pawl 140 on the return movement, they displace the pawl assembly in a counter-clockwise direction about the pin 146 and thereby reset the pawl assembly for pawl engagement with the notched rack during the next cycle of operation.
  • the timing of the pawl release by the above described structure may be controlled by the spacing of the end of the link member 176 from the axis of the bore 28 and that in the specifically described embodiment such is effected by the location of the base 182 of the control recess 78 in the locator member (see FIGURES and 7) relative to the bore axis. It is thus apparent that a given locator member may also -be readily designed to control the full cycling mechanism as well as assure proper positioning and control of crimp depth for a given workpiece and the particular operation to be performed thereon.
  • Such a locator will have the bores 88 and 72 4thereof sized and contoured to accommodate and properly position the workpiece, the spacing intermediate the stop surfaces 36 and the longitudinal axis of the bores set in accordance with the desired depth of crimp to be effected and the spacing between the base i182 of the control recess 78 and the bores set to control the full cycling mechanism and effect the ⁇ disengagement of the pawl 146 from the notched rack ⁇ 138 when the necessary degree of handle displacement to effect the desired crimp depth is reached.
  • the slide member 96 is retracted to expose the locator receiving aperture 32 in the side portion 16 of the carrier member 26 and the slide 170 is displaced against the action of the biasing spring 178 to retract the end of the link member 176 from overlying relation with the bore 28.
  • the lower body portion 82 of the selected control locator 68 is inserted into the locator receiving bore 28 and properly positioned by disposition of the chordal fiat 76 in abutting relation with the chordal flat 34 and by disposition of the base of the leg portions 92 thereof in abutting relationship with the shoulder 24.
  • the locator retainer slide member 96 is then displaced so as to place the forked end 104 thereof in encircling engagement with the body portion 70 ⁇ of the control locator 68 and in overlying relation with the flange 74 thereof.
  • the workpiece is then introduced through the workpiece receiving bore 26 and properly positioned within the control locator bores 72 and 88.
  • Displacement of the handle 116 of the operating member 58 toward the handle I120 of the carrier member 20 results in rotative displacement of the cam surface containing portion 56 of the operating member 58 relative to the dieholder 1) and in concomitant simultaneous alvance of the die members 38 in converging relation toward the axis of the bores 26 and 28.
  • the notched rack 130 is advanced in a direction indicated by the arrow 130:1 in FIGURE 4 relative to the pawl member 140 and the actuating cam surface 180 on the skirt 172 approaches the trigger pin 152 in generally arcuate path.
  • the heretofore described full cycling mechanism will prevent return displacement of the handles 116 and 120, by the engagement of the notched rack 130 by the pawl 140, prior to the completion of a full crimping stroke.
  • the relative displacement of the handle member 116 relative to the handle member will continue until the shoulders 46 on the die members 38 engage the plane stop surfaces 86 on the locator member 68 to halt the advance thereof.
  • the end of the notched rack will have deformed the spring 160 ⁇ and the cam surface 180 on the skirt 172 of the trigger slide 170 will have rotatively displaced the trigger plate 154 about the pin 156 a sufficient distance to result in tripping displacement of the pawl assembly and concomitant disengagement of ythe pawl from the notched rack 130.
  • the spring 160 Upon pawl disengagement, the spring 160 throws the rack back along its path 3f travel, assisting in the separation of the handles llo and l2@ and resetting the pawl assembly when said han- :lles approach their separated position.
  • the above described handle separation results in reverse rotation of the cam surface containing portion ofthe operation member 58 relative to the dieholder 10 and a permitted return of the crimping dies 33, by the biasing springs 52, to their retracted position which return ofthe crimping dies also assists in effecting handle separation. Removal of the workpiece completes the operational cycle.
  • the above described structure provides a novel self-contained crimping tool in which selective utilization of one of a series of control locator members, in accordance with the dictates of a particular workpiece, automatically insures -proper workpiece positioning as well as proper crimp depth and necessary automatic control of a full cycling mechanism to assure the completion of operations upon one workpiece before the initiation of operations upon another and, additionally, provides a tool that may be adapted to varied types of crimping operations upon varying types of workpieces, requiring only the selective utilization of a control locator which may be readily designed and fabricated in accordance with the dictates of a particular workpiece upon which a particular crimping operation is desired to be effected.
  • a tool for crimping a workpiece a dieholder having an axially disposed bore, a carrier member secured to said dieholder, a plurality of crimping dies mounted in said dieholder and displaceable radially of the axis of said bore, a shoulder on each of said dies disposed substantially perpendicular to the direction of displacement thereof and spaced a predetermined distance lfrom the workpiece engaging ends thereof, an operating member rotatably displaceable in one direction relative to said dieholder and carrier member for advancing said crimping dies toward said bore, a control locator selectable in accordance with the dictates of a workpiece insertable into said bore and shaped to properly position such workpiece relative to the converging path of advance of said crimping dies, said control locator including stop surfaces spaced a predetermined distance from the axis of said bore to engage the shoulders on said dies and limit the converging advance thereof and concomitant rotative displacement of said operating member to limit the depth of
  • a dieholder having an axially disposed bore, a carrier member secured to said dieholder, a plurality of crimping dies mounted in said dieholder and displaceable radially of the axis of said bore, an operating member rotatably displaceable in one direction relative to said dieholder and carrier member for advancing said crimping dies toward said bore, a control locator selectable in accordance with the dictates of a workpiece insertable into said bore for positioning such workpiece relative to the converging path of advance of said crimping dies, said control locator including means for limiting the converging advance of said crimping dies and concomitant rotative displacement of said operating member relative to said dieholder and carrier member to limit the depth of crimp introduceable into such workpiece, a notched rack mounted on said operating member and displaceable in conjunction therewith, a pawl assembly mounted onsaid carrier member normally biased into engagement with said notched rack to preclude return
  • a tool for crimping a workpiece a dieholder having an axially disposed bore, a carrier member secured to said dieholder, a plurality of crimping dies mounted in said dieholder and displaceable radially of the axis of said bore, an operating member rotatably displaceable in one direction relative to said dieholder and carrier member for advancing said crimping dies toward said bore, a control locator selectable in accordance with the dictates of a workpiece insertable into said bore for positioning such workpiece relative to the converging path of advance of said crimping dies, said control locator including means for limiting the converging advance of said crimping dies and the concomitant rotative displacement of said operating member relative to said dieholder and carrier member to limit the depth of crimp introduceable into such workpiece, a notched rack mounted on said operating member advanceable in a predetermined path in response to rotative displacement of said operating member in said one direction, a pawl assembly pivotally
  • a dieholder hav- ,ing an axially disposed control locator receiving bore, a
  • control locator means selectable in accordance with the dictates of a workpiece insertable in said bore for positioning such workpiece relative to the converging path of advance of said crimping dies, said control locator means including a control surface spaced a predetermined distance from the axis of said bore in accordance with said dictates of the workpiece, means for precluding return displacement o-f said crimping dies subsequent to limitation of converging advance thereof, and trigger means mounted on said operating member and set by said control-surfaec for deactivating said return displacement precluding means in accordance with the spacing of said control surface from the axis of said bore.
  • a dieholder having an axially disposed control locator receiving bore, a plurality of crimping dies mounted in said dieholder and displaceable radially of the axis of said bore, an operating member for advancing said dies toward said bore axis, control locator means insertable in said bore for positioning a workpiece relative to the converging path of advance of said crimping dies, means for precluding return displacement of said crimping dies subsequent to initiation of converging advance thereof, and trigger means mounted on said operating member and controlled by said control locator means for deactivating said return displacement precluding means to permit return displacement of said crimping dies after a predetermined advance thereof.
  • a dieholder having an axially disposed bore, a carrier member secured to said dieholder, a plurality of crimping dies mounted in said dieholder and displaceable radially of the axis of said bore, an operating member rotatably displaceable in one direction relative to said dieholder and carrier member for advancing said crimping dies toward said bore, a control locator selectable in accordance with the dictates of a workpiece insel-table into said bore for positioning such workpiece relative to the converging path of advance of said crimping dies, said control locator including means for limiting the converging advance of said crimping dies and the concomitant rotative displacement of said operating member relative to said dieholder and carrier member to limit the depth of crimp introduceable into such workpiece, and said locator including a control surface spaced a predetermined distance from the axis of said bore in accordance with said dictates of the workpiece, means for precluding
  • abutment means movably mounted on said dieholder means and connected to said dies for controlling the movement of said dies
  • control locator a removable control locator and means removably securing said locator to said tool in predetermined relation to said dieholder means, said control locator having (a) means sized for receiving and positioning a workpiece therein in coaxial alignment with the axis of said bore and in the path of movement of said dies, and
  • die means mounted on said dieholder for closing and opening movements toward and from the axis of said aperture
  • control means operatively interconnected to said operating means for a pre-setting movement relative thereto and for actuation thereby for rendering said return displacement precluding means ineffective to prevent opening of said die means
  • control locator detachably secured to said carrier member and having (a) means for receiving and positioning a workpiece in said opening in coaxial alignment with the axis of said opening and in the path of said die means, and (b) a control surface spaced a predetermined distance from the axis of said opening and being engaged by and pre-setting said control means relative to said operating means in a position to render said return displacement precluding means ineffective when said die means has been moved by said operating means to a crimping depth predetermined by the spacing of said control surface from said axis.
  • die means mounted on said dieholder for advancement and retraction toward and from the axis of said opening
  • control locator detachably secured to the carrier member and having (a) a body portion sized to receive and position a workpiece in said opening in coaxial alignment with the axis of said opening,
  • stop means operatively connected to said die ⁇ means for movement therewith into engagement with said abutment surface of the control locator for terminating the advancing movement of said die means when said die means has been advanced to a crimping depth predetermined by the spacing of said abutment surface from said axis, and
  • control means pre-set by said control surface for rendering ineffective the means for precluding retraction of said die means when said die means has been advanced to said predetermined crimping depth.
  • control locator and means detachably securing said locator to said tool in predetermined relation to said dieholder, said control locator having (a) means for receiving and positioning a workpiece therein in coaxial alignment with the axis of said bore,

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  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Description

NOV. 13, 1962 G. U5T|N LOCATOR CONTROLLED CRIMPING TOOL 2 Sheets-Sheet 1 Filed Sept. 29, 1959 INVENTOR.
GEO/265 UST/Al ATTORNEY Nov. 13, 1962 G. UsTlN LOCATOR coNTRoLLED CRIMPING Tool.
Filed Sept. 29, 1959 United States Patent O "ice LOCATOR CONTRGLLED CRIMPING TOUL George Ustin, Verona, NJ., assignor to Buchanan Electrical Products Corporation, Hillside, NJ., a corporation of New Jersey Filed Sept. 29, 1959, Ser. No. 843,253 Claims. (Cl. 81-15) This invention relates to crimping tools and particularly to an improved constructon 'for crimping tools adapted for symmetrical controlled crimping of electrical contacts, terminals and similar electrical assemblies.
Crimping tools of the ygeneral type herein of concern which incorporate a bored dieholder rigidly -mounted in a carrier member, a plurality of radially disposed crimping dies reciprocably mounted therein and an associated operating member having a cammed die member actuating surface mounted for rotative displacement relative to the dieholder and carrier member are disclosed in my copending application Serial No. 772,878, iiled November l0, 1958, now United States Patent No. 2,991,675.
In crimping tools of the type herein of concern it is highly desirable to provide for accommodation and proper positioning of various sizes and types of Work pieces and ready adjustment of crimp depth within predetermined limits together with an associated full cycling mechanism to insure that, once a crimping operation has been initiated upon a work piece, a full operating cycle must be completed before initiation of a succeeding operation. The crimping tool structures disclosed in the above identified application provide for the proper positioning of various sizes of work pieces by utilization of replaceable locator assemblies associated with the work piece receiving bore in the dieholder and provide for adjustment of crimp depth and concomitant control of the full cycling mechanism by means of a pawl and ratchet assembly triggered by an adjustable stud or set screw assembly mounted at the ends of the carrier and operating members disposed remote from the dieholder. Although the structure taught and disclosed in the above mentioned copending application represents substantial improvements over the art, it is not such as to completely preclude an individual operator or unauthorized personnel from tampering therewith, albeit with some difficulty, as by deterimental or deleterious adjustment of the stud or set screw assembly controlling the crimp depth through control of the full cycling mechanism.
This invention may be briefly described as an improved construction for crimping tools of the general type indicated above. In general, the invention includes provision of novel structure in which selective utilization of a locator member automatically insures, in addition to proper positioning of a work piece, control of crimp depth and concomitant control of the full cycling mechanism. The invention also includes an improved construction for a locator member to permit control of the crimp depth and the full cycling mechanism thereby.
Among the advantages attendant the hereinafter described invention is the provision of an entirely self-contained crimping tool unit in which selective utilization of 011e of a series of locator members, in accordance with the dictates of a particular work piece, automatically insures proper work piece positioning as well as proper crimp depth and necessary control of the full cycling mechanism to insure the completion of operations upon one work piece before the initiation of operations upon a subsequent workpiece. Another advantage attendant the instant construction is the complete removal of the possibility of undesired and/or detrimental tool adjustment by the operator thereof or by unauthorized personnel. Further advantages of the herein described invention include the 3,663,313 Patented Nov. 13., 1962 provision of extremely uniform crimping operations upon each workpiece and consequent uniformity of finished product as well as the ready adaptation of the basic tool to varied types of crimping operations upon many varying types of Iwork pieces, the latter only requiring the selective utilization of a particular locator member which may be readily designed and fabricated in accordance with the dictates of the particular workpiece upon which a particular crimping operation is desired to be effected.
Still another advantage of the herein described invention is the provision of a control locator construction that may be simply and inexpensively designed and fabricated in accordance with the dictates of a particular workpiece upon which a particular crimping operation is desired to be effected.
The primary object of this invention is the provision of an improved construction for crimping tools.
Another object of this invention is the provision of an improved crimping tool in which selective utilization of a locator, in accordance with the dictates of a workpiece, automatically insures proper workpiece positioning, control of crimp depth and control of a full cycling mechanism to assure completion of any initiated operation be` fore initiation of a subsequent operation.
Another object of this inventon is the provision of an' improved crimping tool so constructed as to preclude undesired adjustment thereof by an operator or unauthorized personnel.
Still another object of this invention is the provision of an improved construction for crimping tools that may be readily adapted for varying types of crimping operations upon many varying types of workpieces through selective utilization -of a particular locator member which vmay be readily and inexpensively designed and fabricated in accordance with the dictates of a particular workpiece upon which a particular crimping operation is desired to be effected.
A further object of this invention is the provision of an improved construction for a locator member to permit control of the crimp ydepth and a full cycling mechanism thereby in `addition to properly positioning a workpiece for the desired crimping operations.
rI'he above and objects and advantages of the invention will appear from the following specification and claims and from the appended drawings which illustrateV the principles of the invention and a presently preferred em-I bodiment of a crimping tool construction incorporating those principles.
Referring to the drawings:
FIGURE l is a plan view of a presently preferred construction for a crimping tool incorporating the principles of this invention;
FIGURE 2 is a plan view, partly in section, of the tool illustrated in FIGURE 1;
FIGURE 3 is a sectional View taken on the line 3-3 of FIGURE l; v
FIGURE 4 is a partial plan view, partly in section, to illustrate the positioning of certain of the elements of the illustrated tool, at the initiation of a crimping operation; FIGURE 5 is a side elevation of a presently preferred construction of a locator member;
FIGURE 6 is a bottom view o-f the locator member illustrated in FIGURE 5;
FIGURE 7 is a sectional view taken on the line 7-7` of FIGURE 6;
FIGURE 8 is a side elevational view of a presently preferred construction of a crimping die;
FIGURE 9 is a plan view of the crimping die illustrated in FIGURE 8.
Referring to the drawings, and particularly to FTIG- UR-ES l through 4, there is shown, by way of illustrative example, a manually operable crimping tool which includes a generally disc-shaped dieholder or plunger body rigidly secured, as by bolts 12 and nuts 14, to the generally circularly shaped side portions 16, 18 of a generally channel or U-shaped carrier member 20. As best shown in FIGURE 3, the dieholder 10 is provided with a conically shaped workpiece entry aperture 22 inwardly terminating in an axially disposed work piece receiving bore 26 as defined -by an inwardly directed annular shoulder 24. Disposed coaxially with and adjacent to the workpiece receiving bore 26 in the dieholder 10 is an enlarged locator member receiving bore 28. The abutting side portion 18 of the carrier member 20 is provided with an enlarged circular workpiece entry aperture 30 disposed in coaxial alignment with the workpiece receiving bore 26. The other side portion 16 of the carrier member 20 is provided with an enlarged locator receiving and positioning aperture 32 disposed in coaxial alignment with the axis of the locator receiving and positioning bore 28 in the dieholder 18. As will be explained later in more detail, the locator receiving and positioning aperture 32 in the side portion 16 is provided with a chordal fiat portion 34 in order to automatically assure proper positioning of a complementally shaped locator member introduceable therein. The dieholder 10 is also provided with a plurality (specifically four in the illustrated embodiment) of radially disposed die member receiving bores 36 each having a crimping die or plunger member, generally designated 38, reciprocably mounted therein.
The detailed construction of one of the die members 38 is illustrated in FIGURES 8 and 9 and, as there shown, each of said die members 38 includes an elongate cylindrically shaped body portion 40 sized to be reciprocably contained within said bores 36. The body portion 48 is provided -with an enlarged head portion 42 at one end thereof which incorporates an exposed cam surface 44. The dependent end of the body portion 40 of the die members 38 includes an inwardly directed pair of aligned shoulders 46 disposed perpendicular to the longitudinal axis of the body portion 40 and defining a straight sided and generally rectangular dependent tip portion 48 that terminates in a crimping tooth 50. As will be explained in more detail later, the shoulders 46 cooperate to limit and thereby control the amount of die member advance.
As illustrated, a die or plunger member 38 of the type described immediately above is mounted in each of the radially disposed die member receiving bores 36 and is biased radially outwardly by a suitable biasing spring 52 disposed within the enlarged peripheral recesses 54 in the dieholder body 1t) and surrounding the body portion 40 beneath the head portion 42 thereof. Surrounding the dieholder 10 and die members 38 mounted therein, and rotatably displaceable relative thereto, is the generally annularly shaped cam surface containing portion 56 of an operating member, generally designated 58. As illustrated, the cam surface containing portion 56 of the operating member 58 is provided with a plurality of cam surfaces 60 engaging the outwardly biased cam surfaced head portions 42 of the individual die members 38. The cam surfaces 60 of the operating member 58 and the cam surfaced head portions 42 of the die members 38 are so designed and arranged that rotative displacement of the operating member 58 relative to the carrier member 20 and dieholder 1t) rigidly mounted therein results, for one direction of rotation, in a simultaneous inward displacement of the individual die members 38, against the action of the individual biasing springs 52, and convergence of the dependent crimping teeth thereof toward the longitudinal axis of the bores 26 and 28 and, for the other direction of rotation, in a permitted outward displacement of the die members 38 by the biasing springs 52.
As mentioned above, the dieholder or plunger body 10 is provided with an enlarged bore 28 sized to receive and contain a locator member generally designated 68 in FIGURE 3. The structure of the locator member 68 is illustrated in more detail in FIGURES 5-7. As there shown, the preferred construction thereof includes an elongate cylindrically shaped body portion 70 having an axially disposed bore 72. The body portion 70 terminates in an outwardly extending peripheral flange 74 preferably having a beveled edge. The iiange 74 is of generally circular configuration sized to be contained Within the receiving aperture 32 in the side plate 16 and is provided with a complemental chordal positioning flat 76 disposed at a predetermined portion of the periphery thereof sized to abut the aforementioned chordal tiat 34 forming a portion of the entry aperture 32. Disposed immediately beneath the extending flange 74 is a control surface in the form of an undercut circular recess 78. The lower shoulder 80 of the recess 78 serves to define a lower body portion, generally designated 82 in FIGURE 7. The lower body portion 82 is externally shaped to provide a series of particularly located arcuate surfaces 84 and plane stop surfaces 86, respectively (see FIGURE 6) and is internally shaped to provide an enlarged bore 88 disposed coaxially with the bore 72. '.As best shown in FIGURE 6, the lower body portion 82 is provided with a plurality of cutout generally rectangular portions or passages (four in the specifically illustrated embodiment) intersecting the plane stop surfaces 86 to provide four uniformly positioned and spaced dependent leg portions 92. vEach of the passages 90 is sized and positioned to receive and pass the tooth 50 and adjacent tip portion 48 of a die member 38 and to limit the converging advance thereof when the shoulders 46 of said die member 38 engage the flattened plane stop surfaces 86 disposed on either side of and defining the entry portion of each of said apertures 90.
As will be apparent to those skilled in this art, the radial distance between the longitudinal axis of the bore 28 and the stop surfaces 86 will, for a given set of die members 38, control the amount of advance of the crimping teeth 50. It will also be apparent to those skilled in this art that the bores 88 and 72 may readily be sized and shaped to accommodate and properly position a workpiece of almost any configuration and that a particular locator member 68 may be fabricated to receive and properly position a given workpiece and to control, within extremely close tolerances, the depth of crimps made therein.
As best shown in FIGURE 3, the lower body portion 82 of a control locator member 68 is adapted to be introduced into the locator receiving bore 28 of the dieholder 10. Proper positioning of the locator member 68 and specifically the proper positioning of the passages 90 therein relative to the path of advance of the die members 38 is automatically attained by the disposition of the chordal positioning fiat 76 thereon in abutting relation with the complemental chordal fiat 34 `forming part of the locator entry aperture 32 in the side portion 16 of the carrier member Ztl. The depth of locator insertion is controlled by disposition of the dependent ends of the locator leg portions 92 in abutting engagement with the inner surface of the shoulder 24 defining the terminus of the locator receiving bore 28.
Positional maintenance of a locator member 68 in the locator receiving lbore 28 after insertion thereof is facilitated by an auxiliary locator member retainer assembly mounted on the surface of the side portion 16 of the carrier member 20. As best shown in FIGURES 1 and 3, the auxiliary retainer assembly includes a forked manually displaceable slide member 96 disposed beneath a bridging retainer 98, The bridging retainer 98 is com veniently secured to the surface of the side portion 16 of the carrier member 20 by a pair of the nuts 12 and bolts 14 that are utilized to secure the dieholder `10 thereto. The displacement of forked slide 96 is guided and limited by means of a bolt 100 mounted thereon having its shaft disposed in a slot 102 in the bridging retainer 98. Preferably the side portion 16 is apertured, as at 106, beneath the bolt 100 to` facilitate assembly. As illustrated, the forked end 104 of .the slide 96 is shaped to engage and partially encircle the body portion 70 of the locator member 68 and to overlie the extending flange 74 thereof. The retainer -assembly is preferably arranged so that the slide 96 may only be advanced when a locator member is properly positioned.
By the above described structure, complete entry and automatic positioning of a locator member 68 can onlyl be effected when the chordal flat 76 on the locator 68 is disposed in abutting relation with the complemental chorda-l at 34 forming part of the locator entry aperture 32 in the side portion 16. With the chordal flats 76 and 34 so aligned, the lower body portion S2 of the locator 68 will be properly positioned within the bore 28 with the base of the dependent leg portions 92 disposed in abutting engaged relationship with the inner surface of the bore defining shoulder 24. With a locator member 68 so positioned, the slide 96 is manually advanced into overlying engagement with the fla-nge 74 and into partially encircling engagement with the body portion 78 of the inserted locator member 68. When so engaged, the locator member 68 will be firmly fixed in proper position with the passages 90 therein properly disposed in the path of the radial advance of the crimping dies 38. Subsequent rotation of the cam surface containing portion 56 of the operating member 58 relative to the dieholder rigidly secured to the carrier member 20, will result in a positive advance of the crimping dies 38, by action of the cam surfaces 6ft on the cam surfaced heads 42 thereof, inwardly towards the axis of the bores 26 and 28 with the dependent tip portions 48 and terminal crimping teeth 5t) thereof passing through the passages 90 in the locator member 68. Suchadvance will continue until the engagement of the shoulders 46 on the individual die members 38 with the plane stop surfaces 86 on the lower body portion 82 of the locator member 68 causes a cessation of crimping die member advance.
As best shown in FIGURES l, 2 and 4, the operating member 58 is provided, as is conventional with manually operable crimping tools of this general type, with an extending handle portion 116- having an integral reinforcing rib l118 which merges with the cam surface containing portion 56 thereof. The carrier member 20 is a-lso provided with an extending handle portion 120 of a generally U-shaped configuration having the side portions thereof joined by a `transverse web 122 (see FIGURE 2). It will be readily understood .that relative movement between the handles 116 and 120 toward one another will effect a rotative displacement of the cam containing surface portion 56 of the operating member 58 relative to the dieholder 10 and carrier member 20 secured thereto and, as described earlier, concomitant advance of the die members 38 toward the axis of the bores 26 and 28. Likewise, relative movement of the handles 1'16 and 120 away from each other permits displacement of the die members 38 away from the `axis of the bores 26 and 28 by the action of the die member biasing springs 52.
lf desired, and as illustrated in FIGURE l, the handle portion- s 116 and 120 of the operating and carrier members, respectively, may be provided with resilient hand grips 124, which may be made of insulating material. In addition, the handle portion 1120 of the carrier member may be conveniently utilized to store a plurality of varying sizes of locator members, as indicated by the dotted lines 126.
The illustrated locator `structure also provides the necessary control of a yfull cycling mechanism to insure completion of the operations upon one workpiece before initiation of operations upon a subsequent workpiece. The disclosed structure effects this desired result by insuring that once a crimping stroke is initiated, a full crimpingstroke, as determined by the engagement of the shoulders 46 of the crimping dies 38 with the stop surfaces 86 on the locator 68, must be performed. To this end there is provided a curved rack 130, pivotally mounted on the reinforcing rib 118 of the operating member 58 as by a rack pin 132. The rack 130 is substantially U-shaped in cross-section, having a base 134 (see FIGURE 3) and a pair of upturned flanges 136 on `each side thereof. The upper surfaces of the flanges 136 are suitably notched, as at 138, to provide a ratchet connection with an loverlying pawl 140 fonning a part of an associated pawl assembly. The dependent ends of the flanges 136 are provided with upstanding tangs 142 to limit the separation of the handle members 116, l and also to reset the pawl 140 and associated pawl assembly, upon completion of a full cycle of operation as will be described in more detail hereinafter.
The illustrated pawl assembly includes the above mentioned pawl 149 mounted intermediate a pair of side plates 144. The side plates 144 are pivotally mounted on a roller pin 146 which is terminally supported by the side portions of the U-shaped handle 120 of the carrier member 20. As illustrated, the base 134 of the curved rack 1:36 rides on the roller pin 146 and is guided thereby during its hereinafter described movement. The pawl assembly also includes an auxiliary tripping pin 148 also mounted intermediate the side plates 1414 beneath the rack 131i and which cooperates with the pawl 140 in maintaining the side plates 144 in uniform spaced relation externally adjacent the upstanding flanges 136 forming the rack 136. The pawl assembly and pawl 141i/ are normally biased by a spring member 150 in a counter-clockwise direction (as viewed in FIGURES 2 and 4) to maintain the pawl 148 in contact with the notched flanges 136 to permit inward movement of the handles 116 and 128 and to prevent their outward movement. The spring member 150 has one end connected to the tripping pin 148 of the side plates 144 and the other end thereof connected to the side wall 18 of the handle 120.
The illustrated trigger assembly includes a trigger plate member 154 pivotally mounted on a pin 156 terminally supported by the side portions of the extending handle 128 of the carrier member 20. The trigger plate member 154 is provided with an extension 158 sized to engage the tripping pin 148 of the heretofore described pawl assembly upon counter-clockwise rotative displacement of the trigger plate member 154 about the pin 156. The trigger assembly is normally biased in a clockwise direction (as viewed in FIGURES 2 and 4) by the weight of the extension 158 and is provided with a stop lug 151 engageable with the cam containing surface portion 56 of the operating member 58 to prevent over-displacement thereof upon tool inversion.
FIGURE 4 generally illustrates the positioning of the above described elements prior to the initiation of a. crimping stroke. With the parts so positioned, displacement of the handle 116 in the direction indicated by the arrow 11611 will result in advance of the rack on the roller pin 146 in the direction indicated by the arrow v 13th: relative to the pawl 140. As the rack 130 so advances, the pawl 140 will ride on the notched surface thereof due to the counter-clockwise biasing effect of the spring on the pivotally mounted pawl assembly and any movement in the opposite direction will be precluded by the engagement of the pawl 140 with the nearest notch 138 previously displaced therepast. As the rack 130 so advances the tanged end thereof will engage and bend the leaf spring member 168 mounted on the handle 120 as by a bracket 162. Rack advance and deformation of the spring 160 will continue until the pawl 140 is disengaged from the notched surface of the rack flanges 138. Disengagement of the pawl 140 from the rack 130 is effected by a clockwise rotational displacement of the pawl assembly about the roller pin 146. The necessary clockwise displacement of the pawl assembly is effected by a counterclockwise rotational displacement of the trigger assembly about the pin 156 which causes the extension 158 of the trigger plate 154 to engage the tripping pin 148 and displace the same. I will now turn to the mechanism for effecting the necessary counter-clockwise rotational displacement of the trigger assembly after a predetermined length of crimping stroke has been effected.
Associated with the above described pawl and trigger assemblies is an actuating member or trigger that is selectively, automatically and properly positioned by the locator member 68 so as to effect the necessary counterclockwise actuation of the trigger assembly and consequent rack release only upon cessation of die member advance. To this end there is provided a displaceable slide member 170 mounted on the handle 116 of the operating member 58. The slide 170 is provided with a dependent skirt 172 suitably slotted as at 174 to permit displacement thereof longitudinally of the handle 116 relative to the pin 132. Mounted on the skirt 172 so as to be disposed radially of the axis of the bores 26 and 23 in the dieholder 10 is an extending link 1'76 sized to' be disposed in abutting relation with the surface of the locator member 68 by disposition of the end thereof within the control recess 78. The link member 176 is maintained in abutting relationship with the surface of the: locator 68 by a biasing spring 178 mounted beneath the slide 17). The dependent edge portion of the skirt 172i is contoured as at 186 to provide an actuating cam surface engageable with the trigger pin 152 forming a part of the trigger assembly. As is apparent from the above description, the effective radius of the path of travel of the cam surface 180 is controlled by the spacing of the end of the link member 176 from the axis of the bores 26 and 28 in the dieholder 10, with such spacing being in turn controlled by the effective diameter of the engaged portion of the locator member 68. For any given locator, however, the slide 17@ and the cam surface 180 on the skirt portion 172 thereof will be fixedly positioned relative to the trigger pin 152.
As shown in FIGURES 4 and 2 the displacement of the handle 116 in the direction indicated by the arrow 116a also causes the cam surface 180 on the skirt 172 to be advanced, in a generally arcuate path, towards and into engagement with the trigger pin 152. A slight further advance of the cam surface 180 displaces the trigger pin 152 and effects a counter-clockwise rotation of the trigger plate 154 about the pivot pin 156, engagement of the tripping pin 148 by the trigger plate extension 158, and rotative clockwise displacement of the pawl assembly and consequent disengagement of the pawl 140 from the notched rack 130. Upon pawl disengagement as described above, the spring member 166 throws the rack 130 backwardly along its previous path of advance with a consequent separation of the handles 116 and 120 thereby assisting the crimping die springs 52 in effecting such handle separation. When the tangs 142 engage the pawl 140 on the return movement, they displace the pawl assembly in a counter-clockwise direction about the pin 146 and thereby reset the pawl assembly for pawl engagement with the notched rack during the next cycle of operation.
As will be apparent to those skilled in this art, the timing of the pawl release by the above described structure may be controlled by the spacing of the end of the link member 176 from the axis of the bore 28 and that in the specifically described embodiment such is effected by the location of the base 182 of the control recess 78 in the locator member (see FIGURES and 7) relative to the bore axis. It is thus apparent that a given locator member may also -be readily designed to control the full cycling mechanism as well as assure proper positioning and control of crimp depth for a given workpiece and the particular operation to be performed thereon.
lt will be equally apparent to tthose skilled in this art that the above described structure readily permits utilization of a single crimping tool to perform any number of varying operations upon any number of varying workpieces, requiring only the selective utilization of a control locator designed to accommodate a particular workpiece and to control the depth of crimp to be made thereon.
By way of further explanation, a full operational cycle will be described. In order to set the tool up for opera- .tions upon a particular workpiece, the operator selects a control locator member that has previously been designed and fabricated in accordance with the workpiece dimensions and crimping operation to be performed thereon. Such a locator will have the bores 88 and 72 4thereof sized and contoured to accommodate and properly position the workpiece, the spacing intermediate the stop surfaces 36 and the longitudinal axis of the bores set in accordance with the desired depth of crimp to be effected and the spacing between the base i182 of the control recess 78 and the bores set to control the full cycling mechanism and effect the `disengagement of the pawl 146 from the notched rack `138 when the necessary degree of handle displacement to effect the desired crimp depth is reached.
After selection of the proper control locator, the slide member 96 is retracted to expose the locator receiving aperture 32 in the side portion 16 of the carrier member 26 and the slide 170 is displaced against the action of the biasing spring 178 to retract the end of the link member 176 from overlying relation with the bore 28. With the above parts so positioned, the lower body portion 82 of the selected control locator 68 is inserted into the locator receiving bore 28 and properly positioned by disposition of the chordal fiat 76 in abutting relation with the chordal flat 34 and by disposition of the base of the leg portions 92 thereof in abutting relationship with the shoulder 24. With the control locator 68 properly so positioned the slide 170 is released and the biasing spring 178 moves the end of the link 176 into abutting engaged relationship with the base surface 182 of the control recess 78 to set the subsequent path of travel of the cam surface 188 on the skirt 172 of the slide 170.
The locator retainer slide member 96 is then displaced so as to place the forked end 104 thereof in encircling engagement with the body portion 70` of the control locator 68 and in overlying relation with the flange 74 thereof. The workpiece is then introduced through the workpiece receiving bore 26 and properly positioned within the control locator bores 72 and 88.
Displacement of the handle 116 of the operating member 58 toward the handle I120 of the carrier member 20 results in rotative displacement of the cam surface containing portion 56 of the operating member 58 relative to the dieholder 1) and in concomitant simultaneous alvance of the die members 38 in converging relation toward the axis of the bores 26 and 28. Concurrently therewith, the notched rack 130 is advanced in a direction indicated by the arrow 130:1 in FIGURE 4 relative to the pawl member 140 and the actuating cam surface 180 on the skirt 172 approaches the trigger pin 152 in generally arcuate path. As explained earlier, the heretofore described full cycling mechanism will prevent return displacement of the handles 116 and 120, by the engagement of the notched rack 130 by the pawl 140, prior to the completion of a full crimping stroke. The relative displacement of the handle member 116 relative to the handle member will continue until the shoulders 46 on the die members 38 engage the plane stop surfaces 86 on the locator member 68 to halt the advance thereof. At this time, the end of the notched rack will have deformed the spring 160` and the cam surface 180 on the skirt 172 of the trigger slide 170 will have rotatively displaced the trigger plate 154 about the pin 156 a sufficient distance to result in tripping displacement of the pawl assembly and concomitant disengagement of ythe pawl from the notched rack 130. Upon pawl disengagement, the spring 160 throws the rack back along its path 3f travel, assisting in the separation of the handles llo and l2@ and resetting the pawl assembly when said han- :lles approach their separated position. The above described handle separation results in reverse rotation of the cam surface containing portion ofthe operation member 58 relative to the dieholder 10 and a permitted return of the crimping dies 33, by the biasing springs 52, to their retracted position which return ofthe crimping dies also assists in effecting handle separation. Removal of the workpiece completes the operational cycle.
As will be apparent to those skilled in this art, the above described structure provides a novel self-contained crimping tool in which selective utilization of one of a series of control locator members, in accordance with the dictates of a particular workpiece, automatically insures -proper workpiece positioning as well as proper crimp depth and necessary automatic control of a full cycling mechanism to assure the completion of operations upon one workpiece before the initiation of operations upon another and, additionally, provides a tool that may be adapted to varied types of crimping operations upon varying types of workpieces, requiring only the selective utilization of a control locator which may be readily designed and fabricated in accordance with the dictates of a particular workpiece upon which a particular crimping operation is desired to be effected.
Having thus described my invention, l claim:
1. ln a tool for crimping a workpiece, a dieholder having an axially disposed bore, a carrier member secured to said dieholder, a plurality of crimping dies mounted in said dieholder and displaceable radially of the axis of said bore, a shoulder on each of said dies disposed substantially perpendicular to the direction of displacement thereof and spaced a predetermined distance lfrom the workpiece engaging ends thereof, an operating member rotatably displaceable in one direction relative to said dieholder and carrier member for advancing said crimping dies toward said bore, a control locator selectable in accordance with the dictates of a workpiece insertable into said bore and shaped to properly position such workpiece relative to the converging path of advance of said crimping dies, said control locator including stop surfaces spaced a predetermined distance from the axis of said bore to engage the shoulders on said dies and limit the converging advance thereof and concomitant rotative displacement of said operating member to limit the depth of crimp introduceable into sa-id workpiece, a full cycling mechanism disposed intermediate said operating and carrier members for precluding return rotative displacement of said operating member subsequent to initiation of rotative displacement thereof in the direction effecting crimping die advance, and trigger means set by said control locator and mounted on said operating member for deactivating said full cycling mechanism in predetermined relation with the limitation of crimping die advance to prevent undercrimping of said workpiece.
2. In a tool for crimping a workpiece, a dieholder having an axially disposed bore, a carrier member secured to said dieholder, a plurality of crimping dies mounted in said dieholder and displaceable radially of the axis of said bore, an operating member rotatably displaceable in one direction relative to said dieholder and carrier member for advancing said crimping dies toward said bore, a control locator selectable in accordance with the dictates of a workpiece insertable into said bore for positioning such workpiece relative to the converging path of advance of said crimping dies, said control locator including means for limiting the converging advance of said crimping dies and concomitant rotative displacement of said operating member relative to said dieholder and carrier member to limit the depth of crimp introduceable into such workpiece, a notched rack mounted on said operating member and displaceable in conjunction therewith, a pawl assembly mounted onsaid carrier member normally biased into engagement with said notched rack to preclude return rotative displacement of said operating member subsequent to initiation of rotative displacement thereof in the direction effecting crimping die advance, a trigger assembly for disengaging said pawl assembly from said notched rack including a trigger member mounted on said operating member and positioned by said control locator for actuating said trigger assembly in predetermined relation with the limitation of crimping die advance to prevent under crimping of said workpiece.
3. ln a tool for crimping a workpiece, a dieholder having an axially disposed bore, a carrier member secured to said dieholder, a plurality of crimping dies mounted in said dieholder and displaceable radially of the axis of said bore, an operating member rotatably displaceable in one direction relative to said dieholder and carrier member for advancing said crimping dies toward said bore, a control locator selectable in accordance with the dictates of a workpiece insertable into said bore for positioning such workpiece relative to the converging path of advance of said crimping dies, said control locator including means for limiting the converging advance of said crimping dies and the concomitant rotative displacement of said operating member relative to said dieholder and carrier member to limit the depth of crimp introduceable into such workpiece, a notched rack mounted on said operating member advanceable in a predetermined path in response to rotative displacement of said operating member in said one direction, a pawl assembly pivotally mounted on said carrier member normally biased into engagement with said notched rack to preclude return displacement thereof subsequent to initiation of advance thereof by said one way displacement of said operating member, a trigger assembly including a plate member pivotally mounted on said carrier member for displacing said pawl assembly out of engagement with said notched rack and normally disposed out of triggering engagement therewith, a slide member displaceably mounted on said operating member and biased toward said dieholder, a trigger mounted on said slide and positioned to pivotally displace said plate member into triggering engagement with said pawl assembly, a link member mounted on said slide and engaging said control locator for positioning said slide and trigger relative to said plate member for actuating the latter in predetermined relation with the limitation of crimping die advance.
4. In a tool for crimping a workpiece, a dieholder hav- ,ing an axially disposed control locator receiving bore, a
plurality of crimping dies mounted in said dieholder and displaceable radially of the axis of said bore, an operating member for advancing said dies toward said bore axis, control locator means selectable in accordance with the dictates of a workpiece insertable in said bore for positioning such workpiece relative to the converging path of advance of said crimping dies, said control locator means including a control surface spaced a predetermined distance from the axis of said bore in accordance with said dictates of the workpiece, means for precluding return displacement o-f said crimping dies subsequent to limitation of converging advance thereof, and trigger means mounted on said operating member and set by said control-surfaec for deactivating said return displacement precluding means in accordance with the spacing of said control surface from the axis of said bore.
5. In a tool for. crimping a workpiece, a dieholder having an axially disposed control locator receiving bore, a plurality of crimping dies mounted in said dieholder and displaceable radially of the axis of said bore, an operating member for advancing said dies toward said bore axis, control locator means insertable in said bore for positioning a workpiece relative to the converging path of advance of said crimping dies, means for precluding return displacement of said crimping dies subsequent to initiation of converging advance thereof, and trigger means mounted on said operating member and controlled by said control locator means for deactivating said return displacement precluding means to permit return displacement of said crimping dies after a predetermined advance thereof.
6. In a tool for crimping a workpiece, a dieholder having an axially disposed bore, a carrier member secured to said dieholder, a plurality of crimping dies mounted in said dieholder and displaceable radially of the axis of said bore, an operating member rotatably displaceable in one direction relative to said dieholder and carrier member for advancing said crimping dies toward said bore, a control locator selectable in accordance with the dictates of a workpiece insel-table into said bore for positioning such workpiece relative to the converging path of advance of said crimping dies, said control locator including means for limiting the converging advance of said crimping dies and the concomitant rotative displacement of said operating member relative to said dieholder and carrier member to limit the depth of crimp introduceable into such workpiece, and said locator including a control surface spaced a predetermined distance from the axis of said bore in accordance with said dictates of the workpiece, means for precluding return rotative displacement of said operating member subsequent to initiation of rotative displacement thereof in the direction effecting crimping die advance and trigger means positioned on said operating member by said control surface for deactivating said return displacement precluding means to permit return displacement of said crimping dies in accordance with the dictates of the iocator.
7. In a crimping tool including l) dieholder means having a workpiece receiving bore,
(2) dies shiftably mounted on said dieholder means for advancement and retraction toward and from the axis of said bore,
(3) actuating means for advancing and retracting said dies toward and from said axis,
(4) abutment means movably mounted on said dieholder means and connected to said dies for controlling the movement of said dies,
(5) a removable control locator and means removably securing said locator to said tool in predetermined relation to said dieholder means, said control locator having (a) means sized for receiving and positioning a workpiece therein in coaxial alignment with the axis of said bore and in the path of movement of said dies, and
(b) an abutment surf-ace in predetermined spaced relation to the axis of said bore and positioned to engage said movable abutment means and on such engagement terminate the advancing movement of said dies at the proper crimp depth for the given size of workpiece.
8. In a crimping tool including l) a carrier member,
(2) a dieholder mounted on said carrier member and having a workpiece receiving aperture therein,
(3) die means mounted on said dieholder for closing and opening movements toward and from the axis of said aperture,
(4) operating means for moving said die means toward and from said axis,
(5) means for precluding return displacement of said die means subsequent to the initiation of a closing movement of said die means,
(6) control means operatively interconnected to said operating means for a pre-setting movement relative thereto and for actuation thereby for rendering said return displacement precluding means ineffective to prevent opening of said die means, and
12 (7) a control locator detachably secured to said carrier member and having (a) means for receiving and positioning a workpiece in said opening in coaxial alignment with the axis of said opening and in the path of said die means, and (b) a control surface spaced a predetermined distance from the axis of said opening and being engaged by and pre-setting said control means relative to said operating means in a position to render said return displacement precluding means ineffective when said die means has been moved by said operating means to a crimping depth predetermined by the spacing of said control surface from said axis.
9. In a crimping tool (l) a carrier member, v
(2) a dieholder mounted on the carrier member and having a workpiece receiving opening therein,
(3) die means mounted on said dieholder for advancement and retraction toward and from the axis of said opening,
(4) means including an operating member shftably mounted on said carrier member and operatively connected to said die means for advancing and retracting said die means,
(5) means operatively interconnecting said carrier member and said die means for precluding retraction of said die means subsequent to the initiation of an advancing movement ot' said die means by said operating member,
( 6) a control locator detachably secured to the carrier member and having (a) a body portion sized to receive and position a workpiece in said opening in coaxial alignment with the axis of said opening,
(b) an abutment surface in predetermined spaced relation to said axis of the opening, and
(c) a control surface spaced a predetermined distance from the axis of said opening,
(7) stop means operatively connected to said die `means for movement therewith into engagement with said abutment surface of the control locator for terminating the advancing movement of said die means when said die means has been advanced to a crimping depth predetermined by the spacing of said abutment surface from said axis, and
(8) control means pre-set by said control surface for rendering ineffective the means for precluding retraction of said die means when said die means has been advanced to said predetermined crimping depth.
10. In a crimping tool (l) a dieholder having a workpiece receiving bore therein,
(2) a plurality of crimping dies mounted on said dieholder for advancement and retraction toward and from the axis of said bore,
(3) an operating member for simultaneously advancing said crimping dies toward the axis of said bore,
(4) spring means for retracting said dies,
(5) a control locator and means detachably securing said locator to said tool in predetermined relation to said dieholder, said control locator having (a) means for receiving and positioning a workpiece therein in coaxial alignment with the axis of said bore,
(b) means for positioning the workpiece in a predetermined position longitudinally of the axis of said bore and in the path of said dies, and
(c) an abutment surface in predetermined spaced relation to the axis of said bore and (6) at least one of said dies having an abutment surface engaging the abutment surface of said locator to prevent advancement of said dies beyond a crimping depth predetermined by the spacing of the abutment surface of the locator from the axis of said bore.
2,435,562 Swengel Feb. 3, 1948 M Deusclile Apr. 12, Carlson Nov. 25, Kusiv et a1 Aug. 9, Dibner Mar. 6, Buchanan July 1G, Demler Dec. 1, Weed Apr. 19,
FORETGN PATENTS Great Britain Feb. 18,
US843253A 1959-09-29 1959-09-29 Locator controlled crimping tool Expired - Lifetime US3063313A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US843253A US3063313A (en) 1959-09-29 1959-09-29 Locator controlled crimping tool
GB32735/60A GB947490A (en) 1959-09-29 1960-09-23 Locator controlled crimping tool
FR839554A FR1268289A (en) 1959-09-29 1960-09-26 Crimping tool controlled by a registration piece
DEB59574A DE1156463B (en) 1959-09-29 1960-09-29 Notching tool

Applications Claiming Priority (1)

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US843253A US3063313A (en) 1959-09-29 1959-09-29 Locator controlled crimping tool

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GB (1) GB947490A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178926A (en) * 1963-04-02 1965-04-20 Thomas & Betts Corp Tool for crimping electrical conductors
US3252316A (en) * 1963-08-14 1966-05-24 Buchanan Electrical Prod Corp Ejector locator
US3971408A (en) * 1973-04-05 1976-07-27 Burgess Vibrocrafters, Inc. Sprayer nozzle construction
US6164107A (en) * 1996-12-12 2000-12-26 Korba, Jr.; William Radius crimping tool
US20070144231A1 (en) * 2005-12-28 2007-06-28 Skluzacek Kenneth A Cable crimp tool
CN103545691A (en) * 2012-07-11 2014-01-29 威德米勒界面有限公司及两合公司 Crimping apparatus for turned contacts
WO2018199841A1 (en) * 2017-04-28 2018-11-01 Pressmaster Ab Hand tool with adjustable release function
USD838564S1 (en) 2015-03-02 2019-01-22 Phoenix Contact Gmbh & Co. Kg Tool
US11794232B1 (en) 2017-05-11 2023-10-24 Simpson Strong-Tie Company Inc. Tool for curving structural framing components

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GB367221A (en) * 1931-03-31 1932-02-18 Carl Rolfes Improvements in or relating to means for attaching detonators to fuses
US2435562A (en) * 1944-10-05 1948-02-03 Aircraft Marine Prod Inc Ferrule crimping tool
US2467012A (en) * 1945-01-27 1949-04-12 Buchanan Electrical Prod Corp Tool for making electrical connectors
US2618993A (en) * 1948-01-14 1952-11-25 Aircraft Marine Prod Inc Connector forming tool with ratchet means for compelling precise operation
US2714827A (en) * 1952-08-15 1955-08-09 Buchanan Electrical Prod Corp Cam actuated crimping pliers
US2737070A (en) * 1953-09-18 1956-03-06 Burndy Engineering Co Inc Tool with full stroke compelling ratchet mechanism
US2753742A (en) * 1953-07-20 1956-07-10 Buchanan Electrical Prod Corp Hand tool for crimping electrical connectors
US2914976A (en) * 1957-03-22 1959-12-01 Amp Inc Crimping tool with double-ended floating die member
US2933000A (en) * 1957-12-27 1960-04-19 Gen Dynamics Corp Crimping tool

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US2727416A (en) * 1952-10-24 1955-12-20 Buchanan Electrical Prod Corp Pivoted hand crimping tool with divergence limiting means
US2787925A (en) * 1954-06-08 1957-04-09 Buchanan Electrical Prod Corp Wire crimping tool with cam-slot actuating means

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Publication number Priority date Publication date Assignee Title
GB367221A (en) * 1931-03-31 1932-02-18 Carl Rolfes Improvements in or relating to means for attaching detonators to fuses
US2435562A (en) * 1944-10-05 1948-02-03 Aircraft Marine Prod Inc Ferrule crimping tool
US2467012A (en) * 1945-01-27 1949-04-12 Buchanan Electrical Prod Corp Tool for making electrical connectors
US2618993A (en) * 1948-01-14 1952-11-25 Aircraft Marine Prod Inc Connector forming tool with ratchet means for compelling precise operation
US2714827A (en) * 1952-08-15 1955-08-09 Buchanan Electrical Prod Corp Cam actuated crimping pliers
US2753742A (en) * 1953-07-20 1956-07-10 Buchanan Electrical Prod Corp Hand tool for crimping electrical connectors
US2737070A (en) * 1953-09-18 1956-03-06 Burndy Engineering Co Inc Tool with full stroke compelling ratchet mechanism
US2914976A (en) * 1957-03-22 1959-12-01 Amp Inc Crimping tool with double-ended floating die member
US2933000A (en) * 1957-12-27 1960-04-19 Gen Dynamics Corp Crimping tool

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178926A (en) * 1963-04-02 1965-04-20 Thomas & Betts Corp Tool for crimping electrical conductors
US3252316A (en) * 1963-08-14 1966-05-24 Buchanan Electrical Prod Corp Ejector locator
US3971408A (en) * 1973-04-05 1976-07-27 Burgess Vibrocrafters, Inc. Sprayer nozzle construction
US6164107A (en) * 1996-12-12 2000-12-26 Korba, Jr.; William Radius crimping tool
US20070144231A1 (en) * 2005-12-28 2007-06-28 Skluzacek Kenneth A Cable crimp tool
CN103545691A (en) * 2012-07-11 2014-01-29 威德米勒界面有限公司及两合公司 Crimping apparatus for turned contacts
EP2685573A3 (en) * 2012-07-11 2014-05-07 Weidmüller Interface GmbH & Co. KG Crimping Tool for Turned Contacts
US9564727B2 (en) 2012-07-11 2017-02-07 Weidmueller Interface Gmbh & Co. Kg Crimping apparatus for turned contacts
CN103545691B (en) * 2012-07-11 2017-03-01 威德米勒界面有限公司及两合公司 Crimping tool for turning contact
USD838564S1 (en) 2015-03-02 2019-01-22 Phoenix Contact Gmbh & Co. Kg Tool
WO2018199841A1 (en) * 2017-04-28 2018-11-01 Pressmaster Ab Hand tool with adjustable release function
US11794232B1 (en) 2017-05-11 2023-10-24 Simpson Strong-Tie Company Inc. Tool for curving structural framing components

Also Published As

Publication number Publication date
DE1156463B (en) 1963-10-31
GB947490A (en) 1964-01-22

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