US3334445A - Grinding machine - Google Patents

Grinding machine Download PDF

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Publication number
US3334445A
US3334445A US406433A US40643364A US3334445A US 3334445 A US3334445 A US 3334445A US 406433 A US406433 A US 406433A US 40643364 A US40643364 A US 40643364A US 3334445 A US3334445 A US 3334445A
Authority
US
United States
Prior art keywords
roller
shoes
grinding
ground
driver
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
US406433A
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English (en)
Inventor
Walter F Green
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.)
Timken Co
Original Assignee
Timken Roller Bearing 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
Application filed by Timken Roller Bearing Co filed Critical Timken Roller Bearing Co
Priority to US406433A priority Critical patent/US3334445A/en
Priority to GB27360/65A priority patent/GB1048336A/en
Priority to BR171131/65A priority patent/BR6571131D0/pt
Application granted granted Critical
Publication of US3334445A publication Critical patent/US3334445A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/14—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding conical surfaces, e.g. of centres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/35—Accessories

Definitions

  • the present invention relates to a grinding machine, and particularly relates to the grinding of tapered rollers which are long as compared to their diameter and which have spherical or conical ends.
  • the present invention is an improvement on the grinder shown in Patent No. 2,478,607.
  • the machine of Patent No. 2,478,607 has been extremely valuable in the antifriction bearing industry in the grinding of the raceways of the inner races (cones) and has resulted in these raceways being ground to much closer limits than have been economically possible for the rollers themselves.
  • Conventionally tapered rollers are ground by either through feed or plunge cut centerless grinding machines. Limitations of these machines include lobing, slippage between the regulating wheel and the tapered roller, and runout errors of the regulating wheel shaft and the bearings.
  • all efforts to grind tapered rollers by the microcentric principle of Patent No. 2,478,607 have ended in failure.
  • the microcentric principle makes use of a flat rotating drive plate against which the flat surface of the raceway is urged, by any one of several methods (i.e., pressure rollers, magnetic driver or pressure ring).
  • the raceway being externally ground takes its lateral and angular position from the driver plate.
  • the shoes, supporting the surface being ground only need to generate the true circular cross section at one point along the length of the raceway and then all other sections along the length of the race also become round with the axis of rotation square with the driver surface.
  • Another principal object of the present invention is to provide a roller grinding device utilizing axial feed through a rotating driver which has limited universal movement with respect to the feed, and utilizing fixed shoes and grinding wheel to grind the rollers to extremely close tolerance limits.
  • Another object of the present invention is to provide a grinder utilizing an axial feed through a rotating driver which is eccentrically positioned with respect to the tapered roller so as to provide seating pressure for the roller against prepositioned shoes which, in conjunction with a prepositioned grinder, accurately determines the final size of the roller.
  • Still another object of the present invention is to provide a roller structure wherein rollers can be finished ground in the grinder and removed therefrom without scoring or scratching the polished roller surface.
  • FIG. 1 is a fragmentary foreshortened plan view of the present invention
  • FIG. 2 is a fragmentary elevational view partly in section of the invention
  • FIG. 3 is a fragmentary diagrammatic view of an indicating device of the invention.
  • FIG. 4 is a sectional view of a driver mechanism
  • FIG. 5 is an end elevational view of the driver shown in FIG. 4.
  • FIG. 6 is a fragmentary view partly in section of a back-up mechanism
  • FIG. 7 is an enlarged fragmentary view partly in section of the grinding mechanism.
  • the present invention comprises a tapered roller grinding machine including fixed shoes to determine the final diameters at the ends of the rollers, a grinding wheel, and a rotating driver which is free to wobble with respect to the end of the roller and which is rotatably driven and axially fed to move the roller through the grinding machine.
  • the present invention further comprises the method and apparatus hereinafter described and claimed.
  • FIGS. 1 and 2 show a roller grinding machine 10 which comprises a stand 11 upon which is mounted a base 12 and a grinding wheel 13.
  • the base 12 mounts four shoes 14 which are provided with carbide inserts 15 of predetermined inner diameters and which are adjustable, through the screw and slot mechanisms 16, toward and away from the center line of the object to be ground (illustrated as a tapered roller 17).
  • the roller 17 is positioned in the carbide inserts 15 which are mounted in the shoes 14 and positioned in pairs at the large and small ends of the roller 17.
  • the shoes 14 can either be solid, integral with the base 12, or, as shown, adjustable so that the carbide inserts 15 may be reground.
  • the sets of shoe inserts 15 are ground to predetermined diameters which correspond to the final. diameter of the small and large ends of the roller 17. These diameters are constant and determine the size of the final ground roller 17
  • the grinding wheel 13 is positioned on an angle with respect to the centerline of the roller 17 corresponding to the taper of the roller 17.
  • An unloading mechanism comprising an arm 18 positioned beneath the roller 17 between the shoes 14 and pivotally attached at its other end 19 also is provided on the base 12.
  • a handle 20 is used to pivot the unloading arm 18 toward and away from the shoes 14.
  • the ground roller 17 can be laterally removed from the shoes 14 without sliding the roller along the shoes 14 and possibly scoring or scratching the polished roller 17.
  • the drive mechanism for the roller 17 is generally indicated by the number 21 and is mounted on a movable slide 22 which is axially moved by a hand wheel 23 through a suitable screw mechanism 24. Rotation of the hand wheel 23 moves the drive mechanism 21 toward and away from the grinding wheel 13.
  • the drive mechanism 21 comprises a spindle adapter or drive member 25,
  • the spindle adapter 25 also is connected to the driver 29 through a steel ball 31 at the centerline of the adapter 25 and the driver 29.
  • This type of universal connection allows the driver 29 to wobble with respect to the centerline of the adapter 25, and to compensate for any 011- squareness of the spherical or conical large end of the roller 17.
  • a nose 32 is positioned on the leading edge of the driver 29 and has teeth 33 on its leading edge.
  • the nose 32 is of a plastic, such as nylon, and connects to the large end of the roller 17 so that the roller 17 is rotated as the driver 29 is rotated Furthermore, since the driver 29 is axially movable toward and away from the grinding wheel 13 by means of the hand wheel 23, it thus advances the roller 29 along the grinding area between the shoes 14 and the grinding wheel 23.
  • a back-up device 34 which includes a fixed outer housing 35 mounted on the base 12 and a slidable inner housing 36 which is keyed to the outer housing at 37 and is connected to an air cylinder 38 which is pressurized to act against the small end of the roller 17 with a constant pressure through a connecting hub 39.
  • the hub 39 is rotatable with respect to the inner housing 36, through a series of antifriction tapered roller bearings 40.
  • the centerline of the back-up hub 39 is aligned with the centerline of the driver 29, and these are eccentric with respect to the cenerline of the roller 17 as may be seen clearly in FIG. 7.
  • the center line of the driver 2) and the back-up hub 39 (indicated by the intersection of the lines A in FIG. 7) is above and to the right of the centerline of the roller 17 (indicated by the intersection of the lines B in FIG. 7) to urge the roller 17 downwardly and against the shoes 14.
  • a finish ground roller is inserted into the shoes 14 and positioned to fit snugly.
  • An air orifice 41 mounted in a bracket (shown in FIG. 3) operates a control dial 42 which then is adjusted until the needle in the dial is at the zero position.
  • the orifice 41 measures a constant diameter over the small end shoes 14, and once the orifice 41 is set, the position of the roller 17 snugly against the shoes 14 is maintained by keeping the needle on the dial 42 at zero while grinding.
  • the roller 17 can be advanced along the shoes 14 and the wheel 13 by means of the hand wheel 23 to maintain the roller diameter measured by the orifice 41.
  • the roller 17 is ground to a predetermined diameter at those circular cross sections adjacent to the shoes 14.
  • the roller 17 is precision ground over its entire length on a taper corresponding to the angular adjustment of the wheel 13 with the centerline of the roller 17 T determine the amount of stock removed from the roller 17, the amount of advance of the roller 17 is measured by an air orifice 13.
  • the amount of stock to be removed from the roller 17 is predetermined, and a gage contact is set with the roller 17 in grinding position to indicate stock removal on the gage dial 4d.
  • the grinding wheel 13 is advanced toward the roller 17 (which is connected to the driver nose 32 and driven by the motor 27 until a light spark is obtained.
  • the wheel 13 then is locked into position, and the hand wheel 23 is rotated to advance the slide 22 and the rotating roller 17 through the grinding area.
  • the diameters at the fixed shoes 14 are maintained constant.
  • the grinding wheel 13 When the roller 17 has reached finished size (determined by the reading on the size dial 44) the grinding wheel 13 is retracted and the roller 17 continues spinning until the small end back-up 34 is removed from contact with the roller 17.
  • a grinding machine for tapered workpieces comprising a base, lengthwise spaced pairs of shoes defining a grinding area, said pairs of shoes having workpiece contact contour of different predetermined diameters corresponding to the final diameters of the ends of the workpieces, a grinding wheel positioned across the grinding area from the shoes at an angle corresponding to the finished taper of the workpieces, and drive mechanism for rotating and axially moving in the grinding area the object to be ground including a rotatable and axially movable drive member having means for being attached to one end of the object to be ground.
  • the drive mechanism includes a rotating drive means, means for imparting the rotation of the drive means to the drive member, means for axially moving the drive member, a second member for engaging the object to be ground, a flexible ring connected to the drive member and to the second member at spaced separate points on their peripheries, and a universal connecting means connecting the drive member to the second member on their centerlines.
  • the structure of claim 1 including a back-up structure for engaging the second end of the object to be ground, said back-up structure including a rotatable member and means for urging the rotatable member against the other end of the object to be ground.
  • the structure of claim 1 including unloading mechanism for removing the object to be ground from the grinder after it is ground, said mechanism including an arm having one end underlying the object during grinding and pivoted at its other end so that the ground object is lifted from the shoes when the arm is moved about the pivot.
  • a grinding machine for a tapered workpiece having a spherical or conical end and relatively long in relation to the diameter comprising a base, two longitudinally spaced pairs of shoes defining a grinding area through which objects to be ground are moved, said shoes having carbide inserts with contact contour of predetermined diameter positioned adjacent to each end of the grinding area, a grindnig wheel positioned along the grinding area across from the shoes in angular relation to the centerline of the objects to be ground, drive mechanism for rotating and axially moving the object to be ground including rotating drive means, means for imparting rotation from the drive means to a drive spindle having a socket at its centerline, means for axially moving the drive spindle while it is rotating, workpiece engaging means having a socket at its centerline, outwardly extending arms on the workpiece engaging means, a flexible ring positioned between the drive spindle and the work piece engaging means, means connecting the flexible ring to the ends of the arms at spaced separate locations around the ring, and a ball positioned in said sockets,
  • said ball and socket and ring engagement providing limited universal movement between the drive spindle and the workpiece engaging means, and a back-up structure for engaging the second end of the object to be ground, said back-up structure including a rotatable member and means for urging the rotatable member against the said second end of the object to be ground, the centerline of the drive spindle and the rotatable member of the backup structure being offset from the centerline of the object to be ground to urge the object to be ground against the shoes.
  • the structure of claim 8 including unloading mechanism for removing the object to be ground from the grinding machine after it is ground, said mechanism including an arm having one end underlying the object during grinding and pivoted at its other end so that the ground object is lifted from the shoes when the arm is moved about the pivot.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
US406433A 1964-10-26 1964-10-26 Grinding machine Expired - Lifetime US3334445A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US406433A US3334445A (en) 1964-10-26 1964-10-26 Grinding machine
GB27360/65A GB1048336A (en) 1964-10-26 1965-06-28 Grinding machine and method
BR171131/65A BR6571131D0 (pt) 1964-10-26 1965-07-09 Maquina e processo de esmerilar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US406433A US3334445A (en) 1964-10-26 1964-10-26 Grinding machine

Publications (1)

Publication Number Publication Date
US3334445A true US3334445A (en) 1967-08-08

Family

ID=23607968

Family Applications (1)

Application Number Title Priority Date Filing Date
US406433A Expired - Lifetime US3334445A (en) 1964-10-26 1964-10-26 Grinding machine

Country Status (3)

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US (1) US3334445A (pt)
BR (1) BR6571131D0 (pt)
GB (1) GB1048336A (pt)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2561561A1 (fr) * 1984-03-22 1985-09-27 Toyoda Machine Works Ltd Machine de meulage a commande numerique destinee a meuler une partie conique d'une piece
WO2001060565A1 (de) * 2000-02-15 2001-08-23 Robert Bosch Gmbh Schleifverfahren und schleifmaschine
US20150111474A1 (en) * 2013-10-17 2015-04-23 Jtekt Corporation Grinding method of grinding roller workpiece and grinding apparatus for grinding roller workpiece
US20160215821A1 (en) * 2013-10-02 2016-07-28 Nsk Ltd. Manufacturing method for tapered roller, and tapered roller bearing
CN108747780A (zh) * 2018-06-20 2018-11-06 绍兴文理学院 一种圆锥滚子凸度的柔性超精加工装置及其方法
CN108942535A (zh) * 2018-08-17 2018-12-07 普雷沃流体控制科技（芜湖）有限公司 一种阀门内腔抛光打磨装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113245922A (zh) * 2021-04-26 2021-08-13 王倩雅 锥形工件加工打磨装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1096189A (en) * 1911-06-14 1914-05-12 Norton Grinding Co Method of grinding rolls.
US1342375A (en) * 1919-03-24 1920-06-01 Delbert F Dunham Valve-grinder
US1611135A (en) * 1922-08-24 1926-12-14 Cincinnati Milling Machine Co Grinding machine
US1676620A (en) * 1923-01-02 1928-07-10 Cincinnati Grinders Inc Grinding apparatus
US1722386A (en) * 1922-11-21 1929-07-30 Cincinnati Grinders Inc Centerless grinding machine
US2059895A (en) * 1931-10-03 1936-11-03 Norton Co Grinding machine
US2478607A (en) * 1946-04-15 1949-08-09 Cincinnati Milling Machine Co Grinding machine
US2772526A (en) * 1955-03-03 1956-12-04 Bryant Grinder Corp Centerless grinding machine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1096189A (en) * 1911-06-14 1914-05-12 Norton Grinding Co Method of grinding rolls.
US1342375A (en) * 1919-03-24 1920-06-01 Delbert F Dunham Valve-grinder
US1611135A (en) * 1922-08-24 1926-12-14 Cincinnati Milling Machine Co Grinding machine
US1722386A (en) * 1922-11-21 1929-07-30 Cincinnati Grinders Inc Centerless grinding machine
US1676620A (en) * 1923-01-02 1928-07-10 Cincinnati Grinders Inc Grinding apparatus
US2059895A (en) * 1931-10-03 1936-11-03 Norton Co Grinding machine
US2478607A (en) * 1946-04-15 1949-08-09 Cincinnati Milling Machine Co Grinding machine
US2772526A (en) * 1955-03-03 1956-12-04 Bryant Grinder Corp Centerless grinding machine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2561561A1 (fr) * 1984-03-22 1985-09-27 Toyoda Machine Works Ltd Machine de meulage a commande numerique destinee a meuler une partie conique d'une piece
WO2001060565A1 (de) * 2000-02-15 2001-08-23 Robert Bosch Gmbh Schleifverfahren und schleifmaschine
US20160215821A1 (en) * 2013-10-02 2016-07-28 Nsk Ltd. Manufacturing method for tapered roller, and tapered roller bearing
US9771979B2 (en) * 2013-10-02 2017-09-26 Nsk Ltd. Manufacturing method for tapered roller, and tapered roller bearing
US20150111474A1 (en) * 2013-10-17 2015-04-23 Jtekt Corporation Grinding method of grinding roller workpiece and grinding apparatus for grinding roller workpiece
US9238289B2 (en) * 2013-10-17 2016-01-19 Jtekt Corporation Grinding method of grinding roller workpiece and grinding apparatus for grinding roller workpiece
CN108747780A (zh) * 2018-06-20 2018-11-06 绍兴文理学院 一种圆锥滚子凸度的柔性超精加工装置及其方法
CN108747780B (zh) * 2018-06-20 2019-08-06 绍兴文理学院 一种圆锥滚子凸度的柔性超精加工装置及其方法
CN108942535A (zh) * 2018-08-17 2018-12-07 普雷沃流体控制科技（芜湖）有限公司 一种阀门内腔抛光打磨装置
CN108942535B (zh) * 2018-08-17 2019-10-11 普雷沃流体控制科技（芜湖）有限公司 一种阀门内腔抛光打磨装置

Also Published As

Publication number Publication date
GB1048336A (en) 1966-11-16
BR6571131D0 (pt) 1973-12-18

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