US3842633A - Resiliently biased starter blade supporting arm for thread roller - Google Patents

Resiliently biased starter blade supporting arm for thread roller Download PDF

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Publication number
US3842633A
US3842633A US00424664A US42466473A US3842633A US 3842633 A US3842633 A US 3842633A US 00424664 A US00424664 A US 00424664A US 42466473 A US42466473 A US 42466473A US 3842633 A US3842633 A US 3842633A
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US
United States
Prior art keywords
starter
blade
supporting arm
starting position
arm
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
US00424664A
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English (en)
Inventor
R Morton
E Grohoski
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.)
National Machinery Co
Original Assignee
Hartford Special Machinery Co
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 US00424664A priority Critical patent/US3842633A/en
Application filed by Hartford Special Machinery Co filed Critical Hartford Special Machinery Co
Priority to GB4399574A priority patent/GB1426149A/en
Publication of US3842633A publication Critical patent/US3842633A/en
Application granted granted Critical
Priority to BR8997/74A priority patent/BR7408997A/pt
Priority to DE19742453088 priority patent/DE2453088A1/de
Priority to JP14335774A priority patent/JPS5412106B2/ja
Assigned to HARTFORD SPECIAL,INC. reassignment HARTFORD SPECIAL,INC. MERGER (SEE DOCUMENT FOR DETAILS). FILED IN THE OFFICE OF SECRETARY OF STATE OF CONNECTICUT ON DEC.31,1979 Assignors: HARTFORD SPECIAL MACHINERY COMPANY, THE, NEW ENGLAND MACHINE AND TOOL COMPANY THE. PAGE COMPANY THE,
Assigned to HARTFORD NATIONAL BANK AND TRUST COMPANY reassignment HARTFORD NATIONAL BANK AND TRUST COMPANY CONDITIONAL ASSIGNMENT (SEE DOCUMENT FOR DETAILS). Assignors: HARTFORD SPECIAL, INC.
Assigned to NATIONAL MACHINERY COMPANY, THE reassignment NATIONAL MACHINERY COMPANY, THE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HARTFORD SPECIAL INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H9/00—Feeding arrangements for rolling machines or apparatus manufacturing articles dealt with in this subclass
    • B21H9/02—Feeding arrangements for rolling machines or apparatus manufacturing articles dealt with in this subclass for screw-rolling machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/06—Making by means of profiled members other than rolls, e.g. reciprocating flat dies or jaws, moved longitudinally or curvilinearly with respect to each other

Definitions

  • a thread roller starter mechanism has a starter blade assembly which is paced for operation by a one-way actuating drive which effects retraction of the starter blade assembly from a starting position.
  • the assembly includes a cantilever mounted arm with a starter blade supported on a free end of the blade supporting arm which is resiliently biased to urge the starter assembly to return toward the starting position and to provide a preselected work blank starting force independent of the actuating drive.
  • Still another object of this invention is to provide an improved starter mechanism which is suited particularly for feeding exceptionally lightweight blanks at a high machine production rate exactly the way it does when the machine is being turned over manually during slow speed adjustment to insure that the thread rolling dies of the machine are in match.
  • FIG. 1 a thread rolling machine is illustrated in FIG. 1.
  • the machine 10 includes an elongated frame on table 12 on which is mounted a feed chute or guide track 14 for conveying blanks 15 in line from a hopper, not shown, to a pair of cooperating stationary and reciprocable dies 16 and 18 respectively.
  • the stationary die 16 is mounted on a stationary die block 20, and the reciprocable die is mounted to a slide 22 by an adjustable clamp assembly 24.
  • Guide track 14 will be understood'to be downwardly inclined so that blanks are fed between rails 34 of track 14.
  • a combination gate and starter blade 36 is mounted adjacent an open end of track 14 for reciprocable movement between stationary and reciprocable dies 16 and 18. Blade 36 is driven for successively feeding each end blank from track 14 to between the starting ends of dies 16, 18. The feeding of each blank is initiated and timed to cooperate with reciprocable movement of slide 22 by a cam 38 attached to and rotating with crank wheel 40.
  • crank wheel 40 has one end of a pitman arm 42 eccentrically pivotally mounted on a crank wheel 40, and the other end of pitman arm 42 is pivotally connected to slide 22 by pivot pin 44.
  • reciprocable die 18 is driven through one complete cycle with the stroke of die 18 being dependent upon the eccentricity of the pivotal mounting of pitman arm 42 to crank wheel 40.
  • a drive mechanism 46 is provided which serves to retract starter blade 36 in one linear direction to open the end of track 14 and to remain open long enough for the single end work blank to be admitted from track 14 into position between the starting end of each die 16, 18.
  • Cam roll 78 may be disengaged from cam 38 under the force of spring 72 upon retraction of a positive adjustment stop 80 from its illustrated position in FIG. 1.
  • Stop 80 is shown having an actuator rod 82 which is connected to a hand operated knob 84.
  • Knob 84 controls the position of the stop 80 and, therefore, the position of pivot point 66 which will be understood to be fixed during normal operation to establish the pivot point for cam roll lever 64 for an operating cycle of the machine 10 with cam roll 78 engaging cam 38.
  • a high point or position of maximum radius 100 on the contour of cam 38 forces cam roll lever 64 counterclockwise about its pivot point 66 as viewed in FIG. 1 to drive bell crank 48 in one angular direction (clockwise) about its pivot pin 50 against the bias of the drive return spring 88 to retract blade 36 from its illustrated starting position and open the discharge end of feed rails 34 of track 14, for discharging an end work blank onto the starting ends of dies 16, 18.
  • Such action is achieved by a starter blade actuating post 104 of bell crank arm 102 which is in one-way driving engagement with an L shaped mounting'plate 106 for blade 36 to cause blade 36 to be retracted in one direction from its starting position (from right to left as viewed in FIG. 1) to open the end of track 14 to permit blank discharge.
  • cam roll 78 passes high point 100 of cam 38 to permit drive return spring 88 to move lug 98 of bell crank 48 in a counterclockwise direction as shown in FIG. 1, thereby returning the starter blade actuating post 104 to its illustrated start position and permitting return of starter blade 36 to its illustrated starting position.
  • a starter blade supporting arm 110 is shown as being preferably formed of a flat strip of spring steel cantilever mounted by a suitable fastener 112 on block 90 to extend in overlying relation to pivot pin 50 of bell crank 48 toward the work station.
  • a free end of arm 110 is secured to leg 114 of the mounting plate 106 by machine screws 108 with leg 116 projecting perpendicular to leg 114 and serving as a support for blade 36 which is secured thereto by any suitable means.
  • a movable adjustment stop 118 is shown extending through arm 110 and plate 106 with a protruding end portion engageable with a fixed stop l20on block 90, a lock nut 122 serving to secure stop 118 in adjusted position.
  • Arm 110 not only supports blade 36, but the resiliency of the spring material itself supplies a propelling force to apply a following motion tostarter blade 36 in a blank feeding direction in response to a return movement of bell crank actuating post 104 and a work blank starting force to wedge each end blank between starting ends of dies 16, 18.
  • the spring force which the blank is subjected to accordingly may be designed to be exceptionally low, being only enough to cause arm 110, blade 36 and its mounting plate 106 and the work blank to follow the return motion of post 104 effected by the cam 38 on cam roll lever 64.
  • a flat strip of spring material is shown at 124 having one end mounted on block by fastener 112 in lapping relation to arm and positioned to coextend therewith in supporting relation along a substantial length of arm 110.
  • Spring 124 serves to effect a desired additional spring loading to arm 110 upon its being strained when retracted by bell crank 48 while further serving to stabilize arm 110 to minimize undesired oscillation during high speed operation.
  • Another feature of the disclosed construction resides in the provision for timing control and stroke length adjustment of the end position of the retracting extreme limit position of starter blade 36.
  • an arcuate slot 126 is formed in cam roll lever 64 along an arc equidistant from pivot pin 54 connecting bell crank arm 52 to turnbuckle 58.
  • cam roll 78 is on the low point of the periphery of cam 38 as illustrated in FIG. 1, the starting position of blade 36 as depicted in FIG. 1 will remain constant while the retraction of blade 36 from the starting position may be adjusted by varying the position of pivot pin 62 within its slot 126 between a maximum at one end of the slot 126, as illustrated, and a minimum at the opposite end of the slot.
  • a maximum stroke length may be achieved, e.g., of about three-sixteenths inch travel, while a minimum stroke length is achieved, e.g., of about three thirtyseconds inch travel for finished diameter screw blanks ranging between 0.125 and 0.045 inches at machine production rates of 1,000 pieces per minute. Accordingly, the length of starter blade travel can be tailored by this adjustment to suit the spacing of the guide track 14 as required for feeding blanks of varying diameters.
  • starter blade 36 In view of the disclosed construction, the only force exerted on starter blade 36 is that effected by the resil ient biasing force of the starter blade assembly itself which produces a following movement relative to the actuating post 104 of bell crank 48 in a blank feeding direction upon return movement of the drive mechanism 46.
  • starter blade stroke length control is effected by the disclosed stroke adjustment means in the cam follower linkage of the drive mechanism without any need whatsoever of changing the throw of the drive actuating cam 38.
  • a starter mechanism for high speed gating and feeding of individual lightweight work blanks from a feed chute of a thread rolling machine to a work station between relatively movable thread rolling dies comprising a frame, a starter mechanism operatively mounted on the frame and including drive means and a starter assembly, the starter assembly having a movable starter blade for movement in opposite directions toward and away from a starting position at the work station, the drive means including a pivotable crank rotatably supported on the frame and engageable with the starter assembly for pacing movement of its starter blade, the pivotable crank providing a one-way drive to retract the starter blade away from its starting position upon rotation of the crank in one angular direction, the starter assembly further including a starter blade supporting arm cantilever mounted at one end on the frame with an opposite free end supporting the starter blade for movement toward and away from its starting position at the work station, the arm being resiliently biased to urge the starter assembly toward engagement with the pivotable crank for effecting a following return motion of the blade toward its starting position, upon rotation of the pivotable crank in the opposite
  • starter mechanism of claim 3 wherein the starter blade is mounted on one surface of the blade supporting. arm, and wherein the starter assembly further includes a spring member engaging a surface of the blade supporting arm opposite its surface on which the starter blade is mounted to provide a desired spring loading, for effecting the preselected work blank starting force urging the starter blade toward its starting position, upon straining the blade supporting arm when driven by the pivotable crank in a direction away from the work station.
  • the starter mechanism of claim 4 wherein the spring member is a flat strip of spring material having one end mounted on the frame in lapping relation to said one end of the blade supporting arm and disposed in coextensive supporting relation along at least a portion of the length of the blade supporting arm.
  • starter mechanism of claim 3 wherein the starter assembly further includes an L shaped mounting plate having first and second legs in substantially perpendicular relation to one another, the first leg being fixed on the free end of the blade supporting arm in generally parallel relation thereto, the second leg projecting toward the work station, the starter blade being secured to the second leg of the mounting plate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Transmission Devices (AREA)
US00424664A 1973-12-14 1973-12-14 Resiliently biased starter blade supporting arm for thread roller Expired - Lifetime US3842633A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00424664A US3842633A (en) 1973-12-14 1973-12-14 Resiliently biased starter blade supporting arm for thread roller
GB4399574A GB1426149A (en) 1973-12-14 1974-10-10 Starter mechanism for thread rolling machine
BR8997/74A BR7408997A (pt) 1973-12-14 1974-10-29 Aperfeicoamento em mecanismo de partida para a abertura de uma saida e a alimentacao de matrizes individuais leves do interior de uma calha de alimentacao de uma maquina de laminar roscas para uma estacao de trabalho
DE19742453088 DE2453088A1 (de) 1973-12-14 1974-11-08 Gewinderollmaschine
JP14335774A JPS5412106B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-12-14 1974-12-13

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00424664A US3842633A (en) 1973-12-14 1973-12-14 Resiliently biased starter blade supporting arm for thread roller

Publications (1)

Publication Number Publication Date
US3842633A true US3842633A (en) 1974-10-22

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ID=23683424

Family Applications (1)

Application Number Title Priority Date Filing Date
US00424664A Expired - Lifetime US3842633A (en) 1973-12-14 1973-12-14 Resiliently biased starter blade supporting arm for thread roller

Country Status (5)

Country Link
US (1) US3842633A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5412106B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BR (1) BR7408997A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2453088A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1426149A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3010528A1 (de) * 1979-03-20 1980-10-02 Hartford Special Inc Nachroll-zusatzeinrichtung fuer eine gewinderollmaschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3225564B1 (en) 2014-11-28 2020-05-06 Kao Corporation Foam dispensing container

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1477067A1 (de) * 1964-12-07 1969-03-27 Hartford Special Machinery Co Schlitten fuer eine Gewindewalzmaschine
US3758900A (en) * 1971-06-03 1973-09-18 Hartford Special Machinery Co Combination point former and thread roller machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3010528A1 (de) * 1979-03-20 1980-10-02 Hartford Special Inc Nachroll-zusatzeinrichtung fuer eine gewinderollmaschine
US4252009A (en) * 1979-03-20 1981-02-24 Hartford Special, Inc. Re-rolling attachment for thread rolling machine

Also Published As

Publication number Publication date
JPS5093253A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-07-25
GB1426149A (en) 1976-02-25
BR7408997A (pt) 1975-12-30
JPS5412106B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1979-05-19
DE2453088A1 (de) 1975-06-26

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Legal Events

Date Code Title Description
AS Assignment

Owner name: HARTFORD NATIONAL BANK AND TRUST COMPANY

Free format text: CONDITIONAL ASSIGNMENT;ASSIGNOR:HARTFORD SPECIAL, INC.;REEL/FRAME:003903/0922

Effective date: 19810515

AS Assignment

Owner name: NATIONAL MACHINERY COMPANY, THE, TIFFIN, OHIO. A C

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HARTFORD SPECIAL INC.;REEL/FRAME:004128/0709

Effective date: 19830503