US3457682A - Lapping machine - Google Patents

Lapping machine Download PDF

Info

Publication number
US3457682A
US3457682A US597114A US3457682DA US3457682A US 3457682 A US3457682 A US 3457682A US 597114 A US597114 A US 597114A US 3457682D A US3457682D A US 3457682DA US 3457682 A US3457682 A US 3457682A
Authority
US
United States
Prior art keywords
lapping
carrier ring
disc
axis
rings
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
US597114A
Other languages
English (en)
Inventor
Stephen A Boettcher
James N Farley
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.)
Speedfam Corp
Original Assignee
Speedfam Corp
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 Speedfam Corp filed Critical Speedfam Corp
Application granted granted Critical
Publication of US3457682A publication Critical patent/US3457682A/en
Assigned to SPEEDFAM CORPORATION, AN IL CORP. reassignment SPEEDFAM CORPORATION, AN IL CORP. RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BOETTCHER, STEPHEN A.
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
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/04—Lapping machines or devices; Accessories designed for working plane surfaces
    • B24B37/07—Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool
    • B24B37/10—Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool for single side lapping
    • B24B37/102—Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool for single side lapping the workpieces or work carriers being able to rotate freely due to a frictional contact with the lapping tool

Definitions

  • a carrier ring concentric of a lapping disc adjacent the outer periphery thereof; means on the carrier ring and engageable by retaining members for restraining rotation of the latter about the axis of the lapping disc relative to the carrier ring; and means for selectively rotating the carrier ring about the axis of the lapping disc for accommodating progressive rotation of the retaining members about the axis of the lapping disc in the direction of rotation of the carrier ring.
  • Our present invention relates to a lapping machine having incorporated therewith apparatus adapted to facilitate loading and unloading of work pieces.
  • a lapping machine of the type contemplated herein comprises a single lapping disc, which is rotatably driven about a vertical axis, and on which retaining and truing rings rest. These rings are free to rotate about their own axes, but are restrained against rotation about the axis of the lapping disc. The rings thus serve to hold work pieces within them against movement with the lapping disc and to wear the lapping surface for maintaining it in planar condition. Between cycles of lapping, lapped work pieces are removed from the retaining rings and work pieces to be lapped are loaded into the rings. Because the retaining rings are maintained at fixed circumferential locations, the operator must walk around the machine while unloading and loading the retaining rings. This procedure is inconvenient and time consuming.
  • each retaining ring is controllably and progressively rotated about the axis of the lapping disc 360" in approximately the period of time required to completely lap the work pieces therein.
  • FIGURE 1 is a plan view of a lapping machine incorporating the principles of our present invention
  • FIGURE 2 is a fragmentary sectional View, taken sub- 3,457,682 Patented July 29, 1969 ice stantially along the line 22 in FIGURE 1, looking in the direction indicated by the arrows;
  • FIGURE 3 is an elevational view of one side of the lapping machine of FIGURE 1, looking in the direction indicated by the arrow 3 in FIGURE 1;
  • FIGURE 4 is a foreshortened elevational view of another side of the lapping machine of FIGURE 1, looking in the direction indicated by the arrow 4 in FIGURE 1.
  • the lapping machine 10 includes a framework with a tubular base or housing 12 which provides support for a horizontal lapping disc 14.
  • the lapping disc 14 may be of one-piece constructionhaving a central well-bore 16, a horizontal lapping surface 18, and a plurality of radial slots 20 for conveying across the disc abrasive and carrier mixture used in the lapping operation.
  • Selective rotation of the lapping disc 14 about a vertical axis is effected by drive means (not shown) mounted within the housing 12 and having a suitable output shaft connected to the underside of the lapping disc 14.
  • drive means (not shown) mounted within the housing 12 and having a suitable output shaft connected to the underside of the lapping disc 14.
  • rotation of the lapping disc 14 is presumed to be counterclockwise.
  • retaining members 22 Resting on the lapping surface 18 are a plurality of retaining members 22 in the form of retaining and truing rings. These rings, which number four in the embodiment of our invention disclosed, are adapted to confine therein work pieces 24.
  • Mounted at the center of the lapping disc 14 is an idler wheel 26 which is engaged by the adjacent sides of the retaining rings 22.
  • a carrier ring 28 is arranged concentrically of the lapping disc 14 adjacent the outer periphery thereof.
  • the carrier ring '28 is formed with radially inwardly directed flange portions 30 in which are rotatably mounted roller stops 32 circumferentially spaced apart.
  • the roller stops 32 are engageable by the sides of the respective retaining rings and serve as means for restraining rotation of the rings about the axis of the lapping disc 14 relative to the carrier ring 28.
  • the carrier ring 28 is rotatably supported at its outer periphery by a plurality of circumferentially spaced idler rolls 34 mounted on the framework 12. Also, the outer periphery of the carrier ring 28 is provided with an annular radial groove 36 across which is disposed a plurality of circumferentially spaced axial pins 38 that serve as external gear tee h means.
  • a vertical plate 49 which supports an electric motor 42, a speed reducer 44 and a horizontally disposed pinion 46.
  • the power driven pinion means 46 projects through an opening in the vertical plate 40 and meshes with the external gear teeth means 38 of the carrier ring 28 whereby the latter may be selectively rotated in a manner and for a purpose to be presently described.
  • a micro switch 48 is mounted on the inboard side of the plate 46 immediately above the carrier ring 28.
  • the micro switch 48 has an actuating plunger 50 that is engageable by vertically extending lugs 52 suitably secured in the carrier ring 28 and circumferentially spaced 90 apart.
  • a conventional control box 54 Mounted on the framework 12 on the side opposite the vertical plate 40.
  • the lapping disc 14 is rotated, and a freely flowing mixture of abrasive particles and an oil carrier is fed to the disc 14 in a conventional manner.
  • a thin film of this abrasive mixture covers the lapping surface 18, and the retaining .and truing rings 22 and the work pieces 24 ride on such film.
  • weight plates (not shown) are disposed within the retaining rings 22 over the work pieces 24. While the weight plates imposed a downward force or pressure on the work pieces 24 for increasing the rate of lapping of the latter, the retaining and truing rings 22 rotate about their own axes whereby to dress the lapping surface 18 for maintenance of its planar condition. Often weight plates are not used as the weight of the work pieces is sufficient to accommodate lapping.
  • the retaining rings 22 While the roller stops 32 rotate with the carrier ring 28 about the axis thereof, the retaining rings 22, as a result of friction forces developed between the lap surface and the rings, are indexed as a group about the axis of the lapping disc at the same rate as the carrier ring 28.
  • the carrier ring 28, and correspondingly the retaining rings and work pieces therein are indexed 90 in approximately one-quarter or less of the period of time required to lap the work pieces.
  • an operator can stand at any given position, for example adjacent the control box 54, and unload and load the rings as they are moved in front of him. In this connection, it is during the dwell periods that the operator removes lapped work pieces from the ring momentarily stationed in front of him and reloads that ring with work pieces to be lapped.
  • the described operational arrangement enables the operator to progressively keep the lapping machine fully loaded at all times without moving around the machine.
  • the motor 42, speed reducer 44 and pinion 46 serve as a driving, rather than a braking, system during indexing of the rings 22 as a group about the axis of the lapping disc.
  • the number of rings employed may be increased or decreased as desired. In the latter circumstances, the number, location and spacing of the roller stops 32 and trip lugs 52 would be subject to change as may be required.
  • a lapping disc rotatably mounted about a vertical axis on the framework and having a horizontal planar lapping surface, and means for rotating the lapping disc, the combination of at least one retaining member resting on the lapping surface and being rotatable about its own axis, a carrier ring concentric of the lapping disc adjacent the outer periphery thereof, means rotatably supporting said carrier ring relative to the framework, means on said carrier ring and engageable by said retaining member for restraining rotation of the latter about the axis of the lapping disc relative to said carrier ring, and said carrier ring bein selectively rotatable about the axis of the lapping disc whereupon said retaining member is progressively rotated about the axis of the lapping disc in the direction of rotation of said carrier ring.
  • a lapping disc rotatably mounted about a vertical axis on the framework and having a horizontal planar lapping surface, and means for rotating the lapping disc, the com bination of at least one retaining member resting on the lapping surface and being rotatable about its own axis, a carrier ring rotatably supported relative to the framework concentric of the lapping disc adjacent the outer periphery thereof, means on said carrier ring and engageable by said retaining member for restraining rotation of the latter about the axis of the lapping disc relative to said carrier ring, said carrier ring being provided with external gear teeth means, and power-driven pinion means meshing with said external gear teeth means for selectively rotating said carrier ring about the axis of the lapping disc whereupon said retaining member is progressively rotated about the axis of the lapping disc in the direction of rotation of said carrier ring.
  • said means rotatably supporting said carrier ring includes a plurality of circumferentially spaced idler rolls mounted on the framework.
  • a lapping disc rotatably mounted about a vertical axis on the framework and having a horizontal planar lapping surface, and means for rotating the lapping disc, the combination of a plurality of retaining and truing rings resting on the lapping surface and being rotatable about their own axes, a.
  • carrier ring rotatably supported relative to the framework concentric of the lapping disc adjacent the outer periphery thereof, a plurality of roller stops on said carrier ring and each being engageable by one of said retaining rings for restraining rotation of the latter about the axis of the lapping disc relative to said carrier ring, and means for selectively rotating said carrier ring about the axis of the lapping disc in steps of 90 interrupted by brief dwell periods whereupon said retaining rings are controllably and progressively rotated as a group about the axis of the lapping disc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US597114A 1966-11-25 1966-11-25 Lapping machine Expired - Lifetime US3457682A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US59711466A 1966-11-25 1966-11-25

Publications (1)

Publication Number Publication Date
US3457682A true US3457682A (en) 1969-07-29

Family

ID=24390141

Family Applications (1)

Application Number Title Priority Date Filing Date
US597114A Expired - Lifetime US3457682A (en) 1966-11-25 1966-11-25 Lapping machine

Country Status (5)

Country Link
US (1) US3457682A (2)
CH (1) CH463305A (2)
DE (1) DE1652180A1 (2)
GB (1) GB1169044A (2)
SE (1) SE320291B (2)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3668813A (en) * 1971-03-23 1972-06-13 R A Stokvis & Fils Lapping machine
US4216629A (en) * 1978-09-15 1980-08-12 Degaeta Albert M Method and apparatus for producing balls
US5131190A (en) * 1990-02-23 1992-07-21 C.I.C.E. S.A. Lapping machine and non-constant pitch grooved bed therefor
US5299393A (en) * 1992-07-21 1994-04-05 International Business Machines Corporation Slurry containment device for polishing semiconductor wafers
US5697832A (en) * 1995-10-18 1997-12-16 Cerion Technologies, Inc. Variable speed bi-directional planetary grinding or polishing apparatus
CN108608274A (zh) * 2018-06-12 2018-10-02 常州市润昌光电科技有限公司 一种超精密环抛机
CN109202691A (zh) * 2018-08-27 2019-01-15 河北工业职业技术学院 镶块研磨机
CN109277942A (zh) * 2018-10-26 2019-01-29 上海致领半导体科技发展有限公司 一种工作环工位自动切换单面研磨机

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2119422C1 (ru) * 1997-08-11 1998-09-27 Акционерное общество открытого типа "Научно-исследовательский технологический институт" Притир
RU2207945C1 (ru) * 2002-01-28 2003-07-10 Открытое акционерное общество "Пензенское конструкторско-технологическое бюро арматуростроения" Устройство для притирки плоских поверхностей
CN111152084B (zh) * 2019-12-28 2021-11-19 天长市正牧铝业科技有限公司 一种旋转式棒球杆研磨加工设备
CN113414707B (zh) * 2021-08-25 2021-11-19 常州树杰塑业有限公司 工件加工输送盘及使用其的工件加工输送机构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1528993A (en) * 1924-01-12 1925-03-10 L A Young Ind Inc Grinding machine
US1862704A (en) * 1927-10-31 1932-06-14 American Encaustic Tiling Comp Tile grinding machine
US2627144A (en) * 1950-03-21 1953-02-03 Crane Packing Co Lapping machine
US2870580A (en) * 1955-04-18 1959-01-27 Pacific Valves Inc Flat lapping machine
US2971298A (en) * 1958-10-03 1961-02-14 Ibm Workholder for a lapping machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1528993A (en) * 1924-01-12 1925-03-10 L A Young Ind Inc Grinding machine
US1862704A (en) * 1927-10-31 1932-06-14 American Encaustic Tiling Comp Tile grinding machine
US2627144A (en) * 1950-03-21 1953-02-03 Crane Packing Co Lapping machine
US2870580A (en) * 1955-04-18 1959-01-27 Pacific Valves Inc Flat lapping machine
US2971298A (en) * 1958-10-03 1961-02-14 Ibm Workholder for a lapping machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3668813A (en) * 1971-03-23 1972-06-13 R A Stokvis & Fils Lapping machine
US4216629A (en) * 1978-09-15 1980-08-12 Degaeta Albert M Method and apparatus for producing balls
US5131190A (en) * 1990-02-23 1992-07-21 C.I.C.E. S.A. Lapping machine and non-constant pitch grooved bed therefor
US5299393A (en) * 1992-07-21 1994-04-05 International Business Machines Corporation Slurry containment device for polishing semiconductor wafers
US5697832A (en) * 1995-10-18 1997-12-16 Cerion Technologies, Inc. Variable speed bi-directional planetary grinding or polishing apparatus
CN108608274A (zh) * 2018-06-12 2018-10-02 常州市润昌光电科技有限公司 一种超精密环抛机
CN109202691A (zh) * 2018-08-27 2019-01-15 河北工业职业技术学院 镶块研磨机
CN109202691B (zh) * 2018-08-27 2019-11-19 河北工业职业技术学院 镶块研磨机
CN109277942A (zh) * 2018-10-26 2019-01-29 上海致领半导体科技发展有限公司 一种工作环工位自动切换单面研磨机

Also Published As

Publication number Publication date
GB1169044A (en) 1969-10-29
DE1652180A1 (de) 1970-01-15
SE320291B (2) 1970-02-02
CH463305A (de) 1968-09-30

Similar Documents

Publication Publication Date Title
US3457682A (en) Lapping machine
US3913271A (en) Apparatus for machining work pieces
US2627144A (en) Lapping machine
GB1307614A (en) Apparatus for loading objects and conveying them from a loading station to at least one working station
CN110877263B (zh) 非等厚鼓式刹车片自动外弧磨床
US5224304A (en) Automated free abrasive machine for one side piece part machining
GB1499059A (en) Finishing apparatus having gyrational and rotational motion-producing components
US2839877A (en) Lapping machine
US3024575A (en) Apparatus for polishing articles
GB1082563A (en) Improvements in or relating to lapping machines and methods of lapping
US4050195A (en) Apparatus for compensating for unbalance of a rotary body
US2883802A (en) Method of and apparatus for lapping shoulders
US2688215A (en) Double lap for lapping parallel faces
US2905078A (en) Apparatus for handling coils
US2912799A (en) Lapping machine
US2987008A (en) Turntable mechanism for conveyor
US3319941A (en) Method and mixing apparatus
US2344475A (en) Abrading apparatus
CN110814960B (zh) 用于非等厚鼓式刹车片外弧磨削的自动生产线及其控制方法
US3245590A (en) Feeder device
CN110900384A (zh) 一种自动进出料的非等厚鼓式刹车片外弧磨削生产线
GB947142A (en) Improvements in or relating to lapping machines
US3456400A (en) Portable polishing tool for in-place polishing of thrust runner bearings
DE865513C (de) Gussputzvorrichtung
US3637064A (en) Apparatus for and method of transferring articles

Legal Events

Date Code Title Description
AS Assignment

Owner name: SPEEDFAM CORPORATION, 509 NORTH THIRD AVE., DES PL

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BOETTCHER, STEPHEN A.;REEL/FRAME:003932/0923

Effective date: 19811105