US2456146A - Cam profiling machine - Google Patents

Cam profiling machine Download PDF

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Publication number
US2456146A
US2456146A US544414A US54441444A US2456146A US 2456146 A US2456146 A US 2456146A US 544414 A US544414 A US 544414A US 54441444 A US54441444 A US 54441444A US 2456146 A US2456146 A US 2456146A
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US
United States
Prior art keywords
cam
cutter
frame
mandrel
blank
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
US544414A
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English (en)
Inventor
Perry Charles
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.)
Vinters Armstrongs Ltd
Original Assignee
Vickers Armstrongs Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vickers Armstrongs Ltd filed Critical Vickers Armstrongs Ltd
Application granted granted Critical
Publication of US2456146A publication Critical patent/US2456146A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q35/00—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually
    • B23Q35/04—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually using a feeler or the like travelling along the outline of the pattern, model or drawing; Feelers, patterns, or models therefor
    • B23Q35/08—Means for transforming movement of the feeler or the like into feed movement of tool or work
    • B23Q35/10—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only
    • B23Q35/109—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only with a continuously turning pattern
    • 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
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30084—Milling with regulation of operation by templet, card, or other replaceable information supply
    • Y10T409/301176—Reproducing means
    • Y10T409/301624—Duplicating means
    • Y10T409/30168—Duplicating means with means for operation without manual intervention
    • Y10T409/30224—Duplicating means with means for operation without manual intervention and provision for circumferential relative movement of cutter and work

Definitions

  • This invention relates to cam profiling machines of the type according to which a peripheral cam is cut on the principle of the relative movement of intersecting circles that represent paths of revolution of points on surfaces of rotatin members, a rotating rotary cutter being fed into the periphery of a rotating cam or cam blank, such movement being guided by a master cam, and means being provided to vary as desired the radius vectors both circumferential and axial of the cam thus cut.
  • the object of the invention is to provide an improved cam profiling machine giving certain important operational advantages that are obtained by virtue of an improved manner of mounting and guiding the cutting tool or tools.
  • Figure 1 represents a front elevation of a cam profiling machine in accordance with the invention
  • Figure 2 represents a planof the same machine
  • Figure 3 represents a side sectional elevation of part only of the same machine on the line III-III of Figure 2;
  • Figure 4 represents a side sectional elevation on the line IV-IV of Figure 2.
  • Figure 5 is a section on the line V-V of Figure 2.
  • a fixed base I I is provided with means for supporting a master cam I2 and a cam blank I 3, both these cam members being mounted and secured on a cam mandrel I4 rotatably supported on the base I I, being journalled in bearing-heads I5, I-6 integral with the base I I (or rigidly associated there-' Supported in the bearing-heads I5, I8 and par allel to the cam mandrel I4 is a cutter-frame axle I9 upon which a swinging cutter-frame 20 is arranged to pivot by means of flanges 2
  • the cutter-frame axle I9 is journalled in fixed bearings in the bearingheads I5, I8.
  • the cutterframe axle I9 is supported by means that make it adjustable transversely of its axis both vertically and horizontally in respect of the cam mandrel I4.
  • the cutter-frame axle I9 may be journalled in rotatable eccentric bearing bushes suitably supported in the bearing-head I5, I I ⁇ ,
  • the flanges H, 22 depend from the cutterframe 20 below the hinder part 25 thereof, which part is substantially of plate-like form and is bored from back to front with two holes adapted to accommodate respectively a tracing guide roller spindle 26 and a cutter spindle 21 which are parallel one to the other and on the front ends of which are carried respectively a tracing guide roller 28 and a rotary milling cutter 29.
  • the tracing guide roller 28 and the cutter 29 are of the same diameter, and in the present case they are cylindrical, though they need not be so, provided that they are of circular cross-section throughout.
  • the tracing guide roller spindle 26 and the cutter spindle 21 are preferably arranged to be initially adjustable longitudinally relatively to the axis of the cam mandrel I4, so as to enable cams with difierent rangesof axial profile to be accommodated.
  • a fixed tracing guide member could be used, formed as a solid of revolution or a portion of such a solid (say asegment thereof) it could for example be a member of circular cross-section rigidly mounted upon the tracing guide roller spindle 26 or such a member formed integral with that spindle; but a roller is preferred as introducing less friction.
  • the front part of the cutter-frame Z0 is formed as an arch 30 in the front limb or Wall 3
  • a flexible drive may be adopted, but it is preferred to provide an electric motor 32 mounted upon the hinder part 25 of the cutter-frame 20 centrally over the cutter- .frl'ame axle IS.
  • the shaft 33 of the motor 32 is provided at its outer end with a small gear wheel 34 rigidly mounted on the shaft 33 and meshing with a larger gear wheel 35 rigidly mounted on the outer end of the cutter spindle 2'l.
  • Gravity alone may be used for feeding a cutter radially into a cam blank, the cutter-frame 2! being so mounted upon the cutter-frame axle is that when the cutter-frame 20 is thrown forward so that the cutter 29 meets the cam blank IS the weight of the cutter-frame 2B and associated members pivoting upon the cutter-frame axle l9" provides the requisite force, until, when the cutting at any point is completed, the cutter-frame 29' becomes supported by tracing guide roller 28 upon the master cam l2.
  • the said weight may be partly balanced by a counter-weight.
  • a spring or weight maybe suitably associated with the cutter-frame Zll to serve the same purpose, the force applied being made adjustable.
  • the invention is not limited to the use of a single cam blank upon the cam mandrel l2; a plurality of cam blanks may be tooled simultaneously if a plurality of milling cutters are provided correspondingly, one cutter to each cam blank to be tooled.
  • the cutter-irame 26 has to be appropriately moved longitudinally of the cam mandrel I4.
  • a feed screw 35 is provided, being rotatably supported in. the bearing-heads l5, l8 and being arranged directly below and parallelto the cutter-frame axle l9. Threaded upon the 1..
  • feed screw 36 is a nut 31 which is a link-like member arranged vertically in respect of its greatest dimension and of rectangular horizontal, crosssection, its. lower end being bored and internally screw-threaded to correspond to the feed screw 36, and its upper end being bored with a hole inwhich (or in a bush in. which) the cutter-frame axle i9 is a sliding fit.
  • the nut 31 is or such a width (measured longitudinally of the cutter- :Erame axle I9) thatit fits slidingly between the flanges 2
  • a hand-wheel 38 with handle 39 is rigidly mounted on one end of the feed screw 36 in order that the cutter-frame 20 with cutter 29 may be fed by hand for the purpose of adjustment, or'onoccasion for the purpose of profiling a cam by hand.
  • the feed screw 36 is provided at its end remote from the hand-wheel 38 with a gear-wheel 40 which is rigidly affixed to the feed screw 3'5 and is associated with reduction gearing through which it is driven from a prime mover, in this case an electric motor.
  • the gear-wheel ie meshes with a pinion M suitably supported on a shaft 42, the pinion 4
  • a suitableelectric motor (not shown), preferably provided with worm gearing for speed-reduction, may be arranged to drive either the shaft 42 or the cam mandrel HS, in
  • cam mandrel Hi is driven through variable-speed gearing so arranged that the rotational speed of the mandrel can be varied independently of the speeds of the cutter 29 and the feed screw 36.
  • a cam profiling machine as hereinbefore described may be modified so as to comprise automatic micrometrical means for making dimensional comparisons between a cam that is cut or partl-ycut and the master cam while the said cam and master cam are in situ in the machine.
  • On the cutter-frame may be provided a fixed contact point adapted'to be brought to bear upon the mastercam, whilst a correspondingly adjusted contact point may be provided in relation to the said cam, this latter contact point forming part of a self-registering micrometer.
  • the arch 30' of the cutter-frame 2B is drilled with two vertical holes 45, it-provided respectively with bushes ll, 48 in order that the said fixed contactpoint and the said contact point forming part of a self-registering micrometer may conveniently be applied.
  • theformer' is the end of a contact rod adapted to fit tightly but so as to be capable of vertical adjustment-within the bushes 4'1; and the latter is the'end of the plunger of a micrometer, which instrument comprises a dial (preferably graduated in thousandths and half thousandths of aninch) rigid-1y associated with a cylindrical s'hank 'adapted to fit tightly but so as to-be capable of vertical adjustment within the bushes 48, within which shank the said plunger is longitudinally movable, its longitudinal motion being accompanied by corresponding radial movement of a pointerassoeiated-withthe saiddi-a-l.
  • the tracing guide roller 25 and the cutter 29- with their respective spindles 26, 2? are first removed so to provide unobstructedacce'ss from above to the master cam 82 and the cam blank l3 (whichisthe said cam that is cut or partly-cut).
  • the said rod is then pressed downwards into the bushes ll until, when the cutter-frame 2B is substantially horizontal, the rod rests'upon the mastercam l2 and in this way supports the cutter-frame 26,
  • the said shank of the micrometer is pressed-downwards into the bushes 48- until the said plunger makes contactwith thc cam blank t3 and is slightly pushed back into the shank, a certain reading of the micrometer pointer being accordingly registered.
  • cams of the kind produced by the machine can be accurately cut to any desired size and profile from a master cam, the diameter of the cutter and contact roller being of course varied according to the size of cam to be cut;
  • the said micrometrical means enables dimensional comparisons to be made quickly and accurately between any cam that is being cut and the master cam;
  • the provision ofthe said variablespeed gearing introduces automatic means to maintain substantially constant the peripheral speed of a cam blank relatively to the cutter;
  • a machine according to the invention lends itself to the cutting of a number of cams simultaneously, the number that can be thus out being limited only by the need for maintaining sufficient rigidity in the machine and by the requirements of apredetermined degree of accuracy in the cams produced.
  • a cam profiling machine according to claim 1 and in which the said tracing guide member is of circular cross-section, as for example a roller adapted to revolve upon a spindle that carries it.
  • a cam profiling machine according to claim 1 and in which the said feeding means comprise a feed screw rotatably supported upon the said base and engaging with a nut suitably associated with the said cutter-frame.
  • a cam profiling machine according to claim 1 and in which the said guiding means comprise a cutter-frame axle supported upon the said base and arranged parallel to the said feed screw, upon which cutter-frameaxle the said cutter-frame is arranged to pivot, the cutter-frame axle being disposed adjacent to the plane common to the axes of the said tracing guide member and the said rotary cutter but at a distance from these members longitudinally thereof.
  • a cam profiling machine comprising a cutter-frame axle supported upon the said base and arranged parallel to the said feed screw, upon which cutter-frame axle the said cutter-frame is arranged to pivot, the cutter-frame axle being disposed adjacent to the plane common to the axes of the said tracing guide member and the said rotary cutter but at a a distance from these members longitudinally thereof, and the said profiling machine having its parts so constructed and arranged that the weight of the said cutterframe and associated members pivoting upon the cutter-frame axle provides the requisite force for feeding a cutter radially into a cam blank.
  • a cam profiling machine comprising a cutter-frame axle supported upon the said base and arranged parallel to the said feed screw, upon which cutter-frame axle the said cutter-frame is arranged to pivot, the cutter-frame axle being disposed adjacent to the plane common to the axes of the said tracing guide member and the said rotary cutter but at a distance from these members longitudinally thereof, and the said means for supporting a master cam and cam blank and rotating them simultaneously comprising a cam mandrel upon which both these cam members are mounted and secured, the said cam mandrel being rotatably supported on the said base and being arranged parallel to the said cutter-frame axle.
  • a cam profiling machine comprising a cutter-frame axle supported upon the said base and arranged parallel to the said feed screw, upon which cutter-frame axle the said cutter-frame is arranged to pivot, the cutter-frame axle being disposed adjacent to the plane common to the axes of the said tracing guide member and the said rotary cutter but at a distance from these members longitudinally thereof, and the said means for supporting a master cam and cam blank and rotating them simultaneously comprising a cam mandrel upon which both these cam members are mounted and secured, the said cam mandrel being rotatably supported on the said base and being arranged parallel to the said cutter-frame axle, and being driven by a suitable prime mover through variable-speed gearing so arranged that the rotational speed of the mandrel can be varied independently of the speeds of the said cutter and the said feed screw.
  • a cam profiling machine according to claim 1 and in which the said guiding means comprise a cutter-frame axle supported upon the said base and arranged: parallel to the said feed screw, upon which cutter-frame axle the said cutter-frame is arranged to pivot, the cutter-frame axle being disposed.
  • the said means for supporting a master cam and cam blank and rotating them simultaneously comprising a cam mandrel upon which both these cam members are mounted and secured, the said cam mandrel being rotatably supported on the said base and being arranged parallel to the said cutter-frarne axle, and being driven by a suitable prime mover through variable-speed gearing'so arranged that the rotational speed of the mandrel can be varied independently of the speeds of the said cutter and the said feed screw, the said feed screw being drivenby the same said prime mover through suitable gearing,
  • a cam profiling machine in which the said cutter-frame is pierced with two parallel rectilinear holes which, when the cutter-frame is in operative position are disposed substantially vertical and radial to the axis of the said cam mandrel, one of the said holes being so formed and disposed as to be adapted to hold rigidly a contact member comprising a fixed removed dimensional comparisons can be made between the cam and the. master cam while both are on the cam mandrel.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Turning (AREA)
  • Control Of Cutting Processes (AREA)
US544414A 1943-11-23 1944-07-11 Cam profiling machine Expired - Lifetime US2456146A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB245441X 1943-11-23

Publications (1)

Publication Number Publication Date
US2456146A true US2456146A (en) 1948-12-14

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ID=10213286

Family Applications (1)

Application Number Title Priority Date Filing Date
US544414A Expired - Lifetime US2456146A (en) 1943-11-23 1944-07-11 Cam profiling machine

Country Status (7)

Country Link
US (1) US2456146A (de)
BE (1) BE463506A (de)
CA (1) CA432596A (de)
CH (1) CH245441A (de)
DE (1) DE829398C (de)
FR (1) FR919273A (de)
GB (1) GB571769A (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE471712A (de) * 1946-03-18
DE923102C (de) * 1953-02-18 1955-02-03 Anton Denk Kopierfraesmaschine
DE929045C (de) * 1953-08-18 1955-06-16 Kodak Ag Kopier-Fraesmaschine
BE549128A (de) * 1955-07-12

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE96611C (de) *
US467596A (en) * 1892-01-26 Carving-machine
DE327957C (de) * 1917-10-18 1920-10-19 Carl Weber Propellerkopiermaschine
US1798926A (en) * 1927-04-07 1931-03-31 Black Carl Machine for copying shoe lasts and other irregular articles
DE534447C (de) * 1931-09-26 Gerhard Zetzsche Verfahren zur Herstellung von Schuhleisten

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE96611C (de) *
US467596A (en) * 1892-01-26 Carving-machine
DE534447C (de) * 1931-09-26 Gerhard Zetzsche Verfahren zur Herstellung von Schuhleisten
DE327957C (de) * 1917-10-18 1920-10-19 Carl Weber Propellerkopiermaschine
US1798926A (en) * 1927-04-07 1931-03-31 Black Carl Machine for copying shoe lasts and other irregular articles

Also Published As

Publication number Publication date
FR919273A (fr) 1947-03-04
CA432596A (en) 1946-01-15
CH245441A (fr) 1946-11-15
GB571769A (en) 1945-09-07
DE829398C (de) 1952-01-24
BE463506A (de)

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