US1712255A - Grinding wheel - Google Patents

Grinding wheel Download PDF

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Publication number
US1712255A
US1712255A US1336A US133625A US1712255A US 1712255 A US1712255 A US 1712255A US 1336 A US1336 A US 1336A US 133625 A US133625 A US 133625A US 1712255 A US1712255 A US 1712255A
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United States
Prior art keywords
grinding
blank
grinding wheel
wheel
tooth
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
US1336A
Inventor
Howard D Colman
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.)
Barber Colman Co
Original Assignee
Barber Colman 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 claimed from US625469A external-priority patent/US1712254A/en
Application filed by Barber Colman Co filed Critical Barber Colman Co
Priority to US1336A priority Critical patent/US1712255A/en
Application granted granted Critical
Publication of US1712255A publication Critical patent/US1712255A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23F—MAKING GEARS OR TOOTHED RACKS
    • B23F21/00—Tools specially adapted for use in machines for manufacturing gear teeth
    • B23F21/02—Grinding discs; Grinding worms

Definitions

  • I Fig. 3 is a fragmental view representing the operation of grinding the other side of 2 thetooth of'a blank.
  • the gear wheels, the sprocket wheels or other articles to be ground will be hereinafter referred to as blanks.
  • the grinding wheel A constituting' the subject of this invention has on its periphcry a series ofequidistant annular ribs A.
  • the grinding w eel 1s 1 so constructed that only fiat surfaces are utilized for grinding the teeth of the blanks.
  • the grinding wheel is given a frusto-conical form, one side of each of the ribs A being erpendicular to the axis of the grinding w eel.
  • the grinding surfaces are indicated by the letter a. In a single passage of a blank across the periphery of the grinding wheel, only one side. of each tooth is ground.
  • the opposite W side of each tooth may be ground theblank 'is positionedso as to present such opposite side of the tooth to the abrasive wheel, whereby the grinding of both sides of each tooth is effected in two passages of the blank 4 across the grinding wheel.
  • the fiat surfaces 0 constituted one side of each tooth of an imaginary rack and that during the other passage W of the blank said surfaces constitute the opposite-sideof said rackteeth.
  • Each blank is rigidly secured to an arbor 0 by means of which the blank is supported durwheel.
  • Fig. 2 is a fragmental view illustrating ing the grinding operation and during its travel in the machine, and through which rolhng movement is imparted to the blank while it is passing the grinding wheel.
  • the gr nding wheel has the same number of grinding surfaces a as there are teeth on the blank, consequently it is possible to pass three blanks in close succession past the. I therefore support the blanks on cars 4, each adapted to support three arbors 0.
  • Suitable means such as master gearing
  • the blanks may be provided to cause the blanks to roll across the periphery of the grinding wheel in the travel of the car.
  • the grinding wheel is made of sufficiently [large diameter so that the necessary peripheral s eed is obtained at the small end of the w eel.
  • the diameter of the grinding wheel may be so great with relation to the thickness of the'blank that there is no objectionable concaving. of the bottoms of the interdental spaces of the blank.
  • a frusto-conical gear grinding wheel having upon its periphery a plurality of equidistant annular plane grinding surfaces which are perpendicular to the axis of the wheel.
  • a gear-grinding wheel having on its eriphery a series of plane grinding suraces constituting in effect elements of a series ofimaginary rack teeth, said wheel being'of relatively large diameterand wide peripheral face as compared with the diameter'and thickness of the gear to be ground.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

M y 7 1929- H. D. COLMAN 1,712,255
GRINDING WHEEL Original Filed March 16, 1923 l: I rhmLs of Grinder INVEN'TEIJR 7 Howard Ca lman 4 W M m.
ATTYIE- Patented May 7, 1929. I.
I UNITED STATES 1,712,255 PATENT OFFICE.
HOWARD D. COLMAN, OF ROCKFORD, ILLINOIS, ASSIGNOR TO BARBER-COLMAN GOM- PANY, OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.
eninnme WHEEL.
Original application filed March 16, 1923, Serial No. 625,469. Divided and. this application filed January 9, i925. Serial No. 1,336.
" In application Serial No. 625,469 filed March 16, 1923, I have disclosed a machine division of said application Serial No.
In the accompanying drawings, Figure 1 is a fragmental plan view of a grinding machine embodying the features of my inven-= tion.
the operation of grinding one side of each tooth of a blank. I Fig. 3 is a fragmental view representing the operation of grinding the other side of 2 thetooth of'a blank.
For-the sake of brevity, the gear wheels, the sprocket wheels or other articles to be ground will be hereinafter referred to as blanks.
The grinding wheel A constituting' the subject of this invention has on its periphcry a series ofequidistant annular ribs A. For the sake of accuracy in grindin and simplicity in dressing, the grinding w eel 1s 1 so constructed that only fiat surfaces are utilized for grinding the teeth of the blanks. To this end the grinding wheel is given a frusto-conical form, one side of each of the ribs A being erpendicular to the axis of the grinding w eel. The grinding surfaces are indicated by the letter a. In a single passage of a blank across the periphery of the grinding wheel, only one side. of each tooth is ground. In-order thatthe opposite W side of each tooth may be ground theblank 'is positionedso as to present such opposite side of the tooth to the abrasive wheel, whereby the grinding of both sides of each tooth is effected in two passages of the blank 4 across the grinding wheel. It will'be evident from Figs. 2 and 3 that during one passage of the blank the fiat surfaces 0: constituted one side of each tooth of an imaginary rack and that during the other passage W of the blank said surfaces constitute the opposite-sideof said rackteeth.
The blanks are indicated at lb. j Each blank is rigidly secured to an arbor 0 by means of which the blank is supported durwheel.
Fig. 2 is a fragmental view illustrating ing the grinding operation and during its travel in the machine, and through which rolhng movement is imparted to the blank while it is passing the grinding wheel. The gr nding wheel has the same number of grinding surfaces a as there are teeth on the blank, consequently it is possible to pass three blanks in close succession past the. I therefore support the blanks on cars 4, each adapted to support three arbors 0. Suitable means, such as master gearing,
may be provided to cause the blanks to roll across the periphery of the grinding wheel in the travel of the car.
It will be seen that while a blank 6 is being rolled past the periphery of the grind ing wheel on one side of the latter, one side of each tooth of'the blank will be ground, and that while the blank is rolling past the grinding wheel diametrically opposite the place where the first grinding operation occurs, the other side of each tooth will be ground.
, The grinding wheel is made of sufficiently [large diameter so that the necessary peripheral s eed is obtained at the small end of the w eel. The diameter of the grinding wheel may be so great with relation to the thickness of the'blank that there is no objectionable concaving. of the bottoms of the interdental spaces of the blank.
I claim as my invention:
.1. A frusto-conical gear grinding wheel having upon its periphery a plurality of equidistant annular plane grinding surfaces which are perpendicular to the axis of the wheel.
2. A gear-grinding wheel having on its eriphery a series of plane grinding suraces constituting in effect elements of a series ofimaginary rack teeth, said wheel being'of relatively large diameterand wide peripheral face as compared with the diameter'and thickness of the gear to be ground.
3. The combination of a plurality of rotary equidistant annular plane gear grinding surfaces, each perpendicular to its axis of rotation, the number of said surfaces be ing equal to the number of teeth on the blank to be ground.
In testimony whereof, I. have hereunto affixed my signature.
HOWARD D. ooLMAn.
US1336A 1923-03-16 1925-01-09 Grinding wheel Expired - Lifetime US1712255A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US1336A US1712255A (en) 1923-03-16 1925-01-09 Grinding wheel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US625469A US1712254A (en) 1923-03-16 1923-03-16 Machine for generating gear wheels
US1336A US1712255A (en) 1923-03-16 1925-01-09 Grinding wheel

Publications (1)

Publication Number Publication Date
US1712255A true US1712255A (en) 1929-05-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE915174C (en) * 1952-03-23 1954-07-15 Hurth Masch Zahnrad Carl Tool for smoothing the tooth flanks of hardened gears
US2998678A (en) * 1955-06-07 1961-09-05 Belock Instr Corp Method and machine for grinding gears

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE915174C (en) * 1952-03-23 1954-07-15 Hurth Masch Zahnrad Carl Tool for smoothing the tooth flanks of hardened gears
US2998678A (en) * 1955-06-07 1961-09-05 Belock Instr Corp Method and machine for grinding gears

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