US3367068A - Grinding wheel mounting - Google Patents

Grinding wheel mounting Download PDF

Info

Publication number
US3367068A
US3367068A US442574A US44257465A US3367068A US 3367068 A US3367068 A US 3367068A US 442574 A US442574 A US 442574A US 44257465 A US44257465 A US 44257465A US 3367068 A US3367068 A US 3367068A
Authority
US
United States
Prior art keywords
wheel
studs
flange
grinding wheel
grinding
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
US442574A
Other languages
English (en)
Inventor
Jr Peter C Dooley
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.)
Kennecott Corp
Original Assignee
Carborundum 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 Carborundum Co filed Critical Carborundum Co
Priority to US442574A priority Critical patent/US3367068A/en
Priority to GB10733/66A priority patent/GB1075914A/en
Priority to FR54679A priority patent/FR1496084A/fr
Priority to BE678290D priority patent/BE678290A/xx
Priority to SE3947/66A priority patent/SE313751B/xx
Application granted granted Critical
Publication of US3367068A publication Critical patent/US3367068A/en
Assigned to KENNECOTT CORPORATION reassignment KENNECOTT CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DEC. 31, 1980 NORTH DAKOTA Assignors: BEAR CREEK MINING COMPANY, BEAR TOOTH MINING COMPANY, CARBORUNDUM COMPANY THE, CHASE BRASS & COPPER CO. INCORPORATED, KENNECOTT EXPLORATION, INC., KENNECOTT REFINING CORPORATION, KENNECOTT SALES CORPORATION, OZARK LEAD COMPANY, PLAMBEAU MINING CORPORATION, RIDGE MINING CORPORATION (ALL MERGED INTO)
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • 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
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto

Definitions

  • This invention relates to grinding wheels and, more particularly, to high speed rotary grinding wheels and spindles for supporting such grinding wheels.
  • a typical resin bonded grinding Wheel of the type having a peripheral grinding edge is mounted on an arbor for rotation.
  • the arbor extends through a central hole in the wheel and flanges are mounted on the arbor on opposite sides of the wheel.
  • One of the flanges is keyed to the arbor and the other flange presses the grinding wheel against the fixed flange.
  • a large nut is threaded on the arbor adjacent the movable flange. Tightening the nut urges the movable flange toward the fixed flange to clamp the grinding wheel between them.
  • An abrasive wheel wears as it is used, and accordingly, it has to be replaced periodically.
  • a large wheel is particularly diflicult to replace because the Wheel is awkward to handle.
  • a spindle assembly having flanges on opposite sides of a wheel.
  • the wheel has no central opening, but a plurality of studs extend through holes in the wheel that are spaced from the central axis of the wheel.
  • the studs have one end mounted in one of the flanges and the other end of each stud extends through a hole in the opposite flange.
  • a nut on each stud is tightened against the flange to clamp the grinding wheel rigidly between the flanges.
  • Each of the holes in the Wheel is lined with a bushing.
  • FIG. 1 is a cross sectional view of the grinding wheel and spindle assembly
  • FIG. 2 is a cross sectional view of the grinding wheel and spindle assembly along the line 2-2 in FIG. 1.
  • the spindle assembly 2 of this invention is adapted to be mounted in wheel housings of conventional grinding machines.
  • the spindle assembly 2 includes a pair of hollow sleeves 4 and 6.
  • the sleeve 6 has an axle 8 extending outwardly from one end and a similar axle 10 is provided on the corresponding end of the sleeve 4.
  • Conventional ball bearing assemblies 12 and 14 are mounted on the respective axles 8 and 10.
  • the ball bearing assemblies 12 and 14 are secured on the axles 8 and 10 by internally threaded rings 16 and 18 which engage the threaded ends of the axles.
  • each of the bearings 12 and 14 is received in a collar 20 and 22, respectively, and caps 24 and 26 cover the ends of the axles and the bearings.
  • the caps 24 and 26 are secured to the collars by screws 28.
  • a wavy spring washer 36 is mounted between the outer race of the bearing 12 and the cap 26 to provide limited axial displacement of the sleeve 4 relative to the collar 22.
  • the collars 20 and 22 are adapted to be clamped in conventional supports in a wheel housing and they remain stationary while the sleeves 4 and 6 rotate.
  • a grinding wheel 32 as shown in FIGS. 1 and 2, having a solid center is clamped between a flange 34 on the sleeve 4 and a flange 36 on the sleeve 6.
  • the flanges have radial bearing portions 38 and 40 which project axially beyond the end of their respective sleeves so that the opposite radial faces of the wheel 32 are supported by the bearing portions 38 and 40.
  • the remaining portions of the sleeves 4 and 6 are spaced from the radial faces of the wheel 32.
  • the grinding wheel 32 is mounted on a plurality of studs 42 which extend between the flanges 34 and 36.
  • the studs preferably are spaced equally around the circumference of the flanges. In this preferred embodiment there are eight studs, four of which are shown in FIG. 2.
  • the studs 42 are press-fitted in holes 44- in the flange 36.
  • Counterbores 46 are provided to receive the heads 48 of the studs 42.
  • the studs fit tightly in the bores 44 and do not turn relative to the flange. Additional means, such as welding, may be used to prevent the studs from turning in the bores 44. It is very important to align the studs 42 with the central axis of the sleeve 6 and to position them accurately relative to the central axis.
  • the inner axial 0 edge of the flange 36 adjacent the bearing surface 40 may 50 are provided in the flange 34 for receiving the studs 42.
  • the studs have a conical end portion to guide the Wheel 32 and the flange 34 over the ends of the studs.
  • the studs also are threaded at the end to receive nuts 52.
  • the nuts 52 cooperate with the studs 42 to clamp the bearing surfaces 38 and 40 directly against the radial faces of the wheel 32.
  • the nuts 52 are lock nuts, so that they are not loosened by vibration.
  • the wheel 32 has a plurality of holes 54 which extend through the wheel and are located to correspond with the positions of the studs 42. It will be seen that the bearing portions 38 and 40 are disposed a substantial distance radially outwardly away from the holes 54 in order to preclude any stress concentration adjacent said holes.
  • Each hole 54 has a liner 56 formed of rigid, nonahrasive material.
  • the liners 56 preferably are formed of fibrous mate rial bonded together by a resin.
  • the liners 56 may be in the form of hollow cylinders which are placed in the abrasive wheel mold before the abrasive material is cast. Then, during the baking of the wheel, the resin liner 56 becomes bonded to the abrasive of the wheel 32.
  • the liners may be in the form of solid plugs.
  • the plugs are drilled out carefully using a gang drill, so that the holes through the liner 56 are accurately positioned with respect to the studs 42.
  • the internal diameter of the liners 56 is only slightly larger than the external diameter of the studs 42 to allow easy assembly of the wheel, while providing good radial location.
  • a conventional sheave 58 is mounted on the exterior of the sleeve 6 and is secured rigidly to the sleeve by a set screw 60, or a key or other suitable means.
  • Drive belts are positioned in the grooves of the sheave 58 for rotating the sleeve 6. Since the wheel 32 and the sleeve 4 are secured to the sleeve 6 by the studs 42, the wheel assembly rotates as a unitary structure. Furthermore, since there is no arbor passing through the center of the grinding wheel 32, the internal stresses in the wheel are minimized.
  • the grinding wheel 32 is mounted between a pair of sleeves 4 and 6.
  • the grinding wheel mounting of this invention also may be applied to an open ended spindle, in which the grinding wheel is mounted on the end of the spindle.
  • a flat plate is substituted for the sleeve 4.
  • the plate has equally spaced holes corresponding to the holes 50 for receiving the studs 42.
  • the spindle is provided with a flange corresponding to flange 36 and with studs corresponding to the studs 42.
  • the plate, the grinding wheel 32, and the spindle are assembled in the same manner as the apparatus shown in FIG. 1.
  • the grinding wheel 32 may be replaced readily when it becomes worn.
  • the nuts 52 are unscrewed from the studs 42 to allow the flange 34 to be separated from the studs.
  • the wheel 32 then may be displaced off of the ends of the studs 42 and a new wheel may be installed in its place.
  • the liners 56 of the replacement wheel are accurately posi tioned so that their central bores are aligned with the studs 42.
  • the internal diameter of the liners 56 is only slightly larger than the external diameter of the studs 42,
  • the flange 34 is installed over the ends of the studs 42 and the nuts 52 are threaded on the studs until the wheel 32 is tightly clamped between the bearing surfaces 38 and 40.
  • the fibrous liners 56 serve another purpose, and that is to protect the threads on the studs when the wheel 32 is being replaced. Since the abrasive material of the wheel is hard enough to cut steel, the threads of the studs 42 may be severely damaged as the wheel passes over the ends of the studs 42, if it were not for the fibrous liners 56. Furthermore, the liners 56 protect the studs from the abrasive material of the wheel. Direct engagement of the wheel and the studs 42 would cause the studs to be abraded, thereby reducing the diameter of the studs and, consequently, the tensile strength of the studs.
  • suflicient pressure should be provided between the flanges 34 and 36 to grip the wheel tightly. This pressure is obtained by tightening of the nuts 42 uniformly around the flange 54. It is preferred that the clamping force provided by the studs be so great that the wheel resists radial displacement almost entirely by the friction force at the bearing surfaces 38 and 40, rather than by the studs 42. After the wheel 32 is assembled between the flanges 34 and 36, the wheel may be dressed in a conventional manner.
  • he spindle assembly of this invention is a rigid unitary structure that in capable of operating efficiently at high speeds.
  • the axles 8 and 10 are integral with the sleeves 6 and 4, respectively, and the sleeves are tightly clamped against the wheel 32.'It has been found that the spindle assembly of this invention has a greater beam strength than the arbor type mounting because the assembly is more rigid. This permits the spindle assembly of this invention to be operated at substantially higher speeds than the arbor type mountain.
  • a grinding wheel spindle assembly comprising: a sleeve having a first radial flange at one end thereof; axle means secured to said sleeve for rotation therewith; means forming a second radial flange separate from said sleeve; a rotary grinding wheel between said first and second flanges; said grinding wheel having a plurality of holes; a plurality of studs firmly secured at their one ends, respectively, in said first radial flange and disposed radially, outwardly from the central axis of said first flange; said studs extending substantially parallel to said central axis of said first flange and extending outwardly fromsaid first flange through said holes of said grinding wheel; said second flange having a plurality of holes in position to receive said studs therein; nuts mounted on the other end of said studs, respectively, whereby said grinding Wheel may be clamped between said first and second flanges; said flanges having surfaces, respectively, hearing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
US442574A 1965-03-25 1965-03-25 Grinding wheel mounting Expired - Lifetime US3367068A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US442574A US3367068A (en) 1965-03-25 1965-03-25 Grinding wheel mounting
GB10733/66A GB1075914A (en) 1965-03-25 1966-03-11 Grinding wheel mounting
FR54679A FR1496084A (fr) 1965-03-25 1966-03-23 Montage de meules de rectification
BE678290D BE678290A (en)) 1965-03-25 1966-03-23
SE3947/66A SE313751B (en)) 1965-03-25 1966-03-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US442574A US3367068A (en) 1965-03-25 1965-03-25 Grinding wheel mounting

Publications (1)

Publication Number Publication Date
US3367068A true US3367068A (en) 1968-02-06

Family

ID=23757319

Family Applications (1)

Application Number Title Priority Date Filing Date
US442574A Expired - Lifetime US3367068A (en) 1965-03-25 1965-03-25 Grinding wheel mounting

Country Status (5)

Country Link
US (1) US3367068A (en))
BE (1) BE678290A (en))
FR (1) FR1496084A (en))
GB (1) GB1075914A (en))
SE (1) SE313751B (en))

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3469485A (en) * 1967-01-03 1969-09-30 Carborundum Co Oscillating cut-off machine
US4218851A (en) * 1979-03-09 1980-08-26 Norton Company High speed rotatable abrasive body and mounting
NL8304490A (nl) * 1983-03-02 1984-10-01 Nissin Machine Works Integrale slijpschijf, die een roterend standaardoppervlak heeft.
CN107953246A (zh) * 2017-11-29 2018-04-24 郑州博尔德磨料磨具有限公司 一种磨料磨具与打磨机连接的固定装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4010454A1 (de) * 1990-03-31 1991-10-02 Winter & Sohn Ernst Hochgeschwindigkeitsschleifscheibe und verfahren der ausbildung
AT400013B (de) * 1990-05-07 1995-09-25 Rappold International Sales Ag Schleifanordnung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1918392A (en) * 1930-03-13 1933-07-18 Ferdinand J Hohnhorst Abrading wheel and mounting therefor
US2021536A (en) * 1933-03-06 1935-11-19 John Bath & Company Auxiliary spindle for grinding wheels
US2173461A (en) * 1935-11-04 1939-09-19 Norton Co Grinding wheel and method of grinding
US2476234A (en) * 1948-08-26 1949-07-12 Landis Tool Co Grinding wheel mounting
US2741070A (en) * 1953-03-30 1956-04-10 Mid West Abrasive Co Swing grinder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1918392A (en) * 1930-03-13 1933-07-18 Ferdinand J Hohnhorst Abrading wheel and mounting therefor
US2021536A (en) * 1933-03-06 1935-11-19 John Bath & Company Auxiliary spindle for grinding wheels
US2173461A (en) * 1935-11-04 1939-09-19 Norton Co Grinding wheel and method of grinding
US2476234A (en) * 1948-08-26 1949-07-12 Landis Tool Co Grinding wheel mounting
US2741070A (en) * 1953-03-30 1956-04-10 Mid West Abrasive Co Swing grinder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3469485A (en) * 1967-01-03 1969-09-30 Carborundum Co Oscillating cut-off machine
US4218851A (en) * 1979-03-09 1980-08-26 Norton Company High speed rotatable abrasive body and mounting
NL8304490A (nl) * 1983-03-02 1984-10-01 Nissin Machine Works Integrale slijpschijf, die een roterend standaardoppervlak heeft.
CN107953246A (zh) * 2017-11-29 2018-04-24 郑州博尔德磨料磨具有限公司 一种磨料磨具与打磨机连接的固定装置

Also Published As

Publication number Publication date
GB1075914A (en) 1967-07-19
SE313751B (en)) 1969-08-18
FR1496084A (fr) 1967-09-29
BE678290A (en)) 1966-09-01

Similar Documents

Publication Publication Date Title
CA2569963C (en) Improved grinding wheel
US2799445A (en) High speed rotor
US2887276A (en) Shell type pulpstone
US3367068A (en) Grinding wheel mounting
US3636665A (en) Segmented grinding wheel
US2377046A (en) Mounting for sheaves and the like
US3540165A (en) Device for rotatably holding a braking member having opposed braking surfaces for machining said surfaces
US4232834A (en) Roll crusher
US4447993A (en) Alignment means for centrifugal blasting wheel
US4577440A (en) Clamping device for a grinding ring
EP0209564B1 (en) Method of mounting stones in disc or attrition mills
US2841929A (en) Truing device for peripheral type grinding wheels
US3772831A (en) Grinding wheel
US2450230A (en) Grinding wheel chuck
US3973737A (en) Pulp grinder
US3727957A (en) Forming roll
US2693670A (en) Pulpstone
US1204063A (en) Bearing for shafts, spindles, and the like.
US2720733A (en) Grinding wheel
US3332174A (en) Mounting adaptor assembly
CN201189635Y (zh) 金刚石磨轮自动定心装置
US1920204A (en) Abrasive wheel mount
EP0741631B1 (en) Positive radial location of wheels on spindles
US2810241A (en) Grinding head
RU2071410C1 (ru) Лепестковый круг

Legal Events

Date Code Title Description
AS Assignment

Owner name: KENNECOTT CORPORATION

Free format text: MERGER;ASSIGNORS:BEAR CREEK MINING COMPANY;BEAR TOOTH MINING COMPANY;CARBORUNDUM COMPANY THE;AND OTHERS;REEL/FRAME:003961/0672

Effective date: 19801230