US1306855A - George richards - Google Patents

George richards Download PDF

Info

Publication number
US1306855A
US1306855A US1306855DA US1306855A US 1306855 A US1306855 A US 1306855A US 1306855D A US1306855D A US 1306855DA US 1306855 A US1306855 A US 1306855A
Authority
US
United States
Prior art keywords
hob
work
cutter
threads
same
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
Publication date
Application granted granted Critical
Publication of US1306855A publication Critical patent/US1306855A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23GTHREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G5/00Thread-cutting tools; Die-heads
    • B23G5/18Milling cutters
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00Cutters, for shaping
    • Y10T407/17Gear cutting tool
    • Y10T407/1715Hob
    • Y10T407/172Thread cutting

Definitions

  • This invention relates to rotary cutters of the hob type for milling screw-threads; that is to say, cutters which, in order to cut the threads to the required depth, are capable of being advanced in' a direction at right angles to the axis of the work, but partake of no longitudinal movement in a direction parallel thereto.
  • A represents the work-piece and B the hob.
  • the former rotates on a fixed axis in the direction of the arrow (4.
  • the latter revolves in the same direction and at the same rotative speed, but on an axis which is capable of lateral motion in the direction of the arrow 1). So long as the axes of the two bodies maintain the same relative positions, their rotative speeds being equal, each tooth of Specification of Letters Patent.
  • the cutter will, in the course of its rotation, arrive at the same point of contact in the periphery of the work-piece, with the result that facets are formed in the surface of the latter as shown. If, however, the axis of the cutter be gradually moved in the direction of the arrow Z) a distance corresponding with the pitch of the teeth-points, the cutting action of each tooth comes into operation somewhat earlier at each revolution, with the result that the facet-making effect is eliminated or avoided. The same lateral movement of the cutter is continued until its axis arrives in the vertical plane of the work-piece, with the object of cutting the thread in the latter to its full depth.
  • the hob in moving laterally, partakes of a rectilinear motion; but it may, if preferred, be caused to move through an arc of a circle whereof the center is either above or below that of the work.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Processing (AREA)

Description

G. RICHARDS.
CUTTER OR HOB FOR MILLING SCREW THREADS.
, APPLICATIONIHLED AUG.14,1918- 1,306,855; Pa-tenfed June 17, 1919.
GEORGE RICHARDS, OF WESTMINSTER, LONDON, ENGLAND.
CUTTER OR HOB FOR MILLING SCREW-THREADS.
Application filed August 14, 1918.
To all whom it may concern:
Be it known that I, GEORGE RICHARDS, a citizen of the United States, residing at the Outer Temple, 222 Strand, in the city of Westminster, London, England, have invented new and useful Improvements in Cutters or Hobs for Milling Screw-Threads, of which the following is a specification.
This invention relates to rotary cutters of the hob type for milling screw-threads; that is to say, cutters which, in order to cut the threads to the required depth, are capable of being advanced in' a direction at right angles to the axis of the work, but partake of no longitudinal movement in a direction parallel thereto.
In the specifications to British Letters Patent granted to me, and dated 15th October, 1915, No. 14571 25th November, 1915, No. 1667 9, and 15th January, 1916, No. 103318, are described means whereby, in milling screw-threads with the aid of hobs, the formation of facets upon the work is prevented. My present invention relates to simplified means whereby the formation of such facets is prevented; same consisting in moving the hob laterally in a plane approximately parallel with a tangent of the workplece.
In the accompanying drawing, A represents the work-piece and B the hob. The former rotates on a fixed axis in the direction of the arrow (4. The latter revolves in the same direction and at the same rotative speed, but on an axis which is capable of lateral motion in the direction of the arrow 1). So long as the axes of the two bodies maintain the same relative positions, their rotative speeds being equal, each tooth of Specification of Letters Patent.
Patented June 17, 1919.
Serial No. 249,891.
the cutter will, in the course of its rotation, arrive at the same point of contact in the periphery of the work-piece, with the result that facets are formed in the surface of the latter as shown. If, however, the axis of the cutter be gradually moved in the direction of the arrow Z) a distance corresponding with the pitch of the teeth-points, the cutting action of each tooth comes into operation somewhat earlier at each revolution, with the result that the facet-making effect is eliminated or avoided. The same lateral movement of the cutter is continued until its axis arrives in the vertical plane of the work-piece, with the object of cutting the thread in the latter to its full depth.
In my aforesaid previous specifications, the creep in advance motion for the avoidance of facets was effected by an angular movement of the hob about its own axis.
According to the herein described method of accomplishing the same object, the hob, in moving laterally, partakes of a rectilinear motion; but it may, if preferred, be caused to move through an arc of a circle whereof the center is either above or below that of the work.
I claim In milling screw threads with the aid of a rotary cutter of the hob type, the herein described means whereby the teeth of the cutter are advanced to the full depth of the thread to be out, and the formation of facets upon the surface of the work is at the same time prevented; same consisting in imparting to the work a relative lateral movement in a direction approximately at right angles to a line connecting their respective centers.
GEORGE RICHARDS.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.
US1306855D George richards Expired - Lifetime US1306855A (en)

Publications (1)

Publication Number Publication Date
US1306855A true US1306855A (en) 1919-06-17

Family

ID=3374377

Family Applications (1)

Application Number Title Priority Date Filing Date
US1306855D Expired - Lifetime US1306855A (en) George richards

Country Status (1)

Country Link
US (1) US1306855A (en)

Similar Documents

Publication Publication Date Title
US2398570A (en) Face clutch
FR2269397A1 (en) Forming of worm gear threads and gear teeth - gear is first cut and then after hardening is ground while mating gear is milled
JP2017064800A5 (en)
US2334366A (en) Method of producing face clutches
US1306855A (en) George richards
CN104985260B (en) The continuous Rolling-cut shear method of straight bevel gear
US2318179A (en) Gear finishing
US2787939A (en) Method of cutting toothed face coupling members
US2273908A (en) Gear cutter
SU709291A1 (en) Hob cutter
US2252044A (en) Cutter for cutting gears
US1306856A (en) George richards
US1339223A (en) Means applicable for use in milling screw-threads
SU429909A1 (en) METHOD FOR TREATING CIRCULAR TEETS OF WHEELS OF CYLINDRICAL AND SCREW TRANSMISSIONS
SU1659185A1 (en) Method of manufacturing hob cutter
SU450657A1 (en) The method of line volumetric processing of shaped surfaces
SU443733A1 (en) The method of processing globoid worms
US2682099A (en) Gear cutter
SU685451A1 (en) Gear-working method
SU651904A1 (en) Method of machining complex surfaces
US3036362A (en) Milling cutter for generated gears
US1998665A (en) Cutter
EA031383B1 (en) Method for machining non-round parts having a triangular profile of equal width
US2938436A (en) Gear shaving
SU437333A1 (en) The method of processing the teeth of spur gears