GB338317A - Improvements in lapping machines - Google Patents

Improvements in lapping machines

Info

Publication number
GB338317A
GB338317A GB31891/29A GB3189129A GB338317A GB 338317 A GB338317 A GB 338317A GB 31891/29 A GB31891/29 A GB 31891/29A GB 3189129 A GB3189129 A GB 3189129A GB 338317 A GB338317 A GB 338317A
Authority
GB
United Kingdom
Prior art keywords
lap
shaft
pressure
work
worm
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
Application number
GB31891/29A
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.)
Saint Gobain Abrasives Inc
Original Assignee
Norton 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 Norton Co filed Critical Norton Co
Publication of GB338317A publication Critical patent/GB338317A/en
Expired legal-status Critical Current

Links

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
    • B24B37/08—Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool for double side lapping

Abstract

338,317. Norton Co. Oct. 19, 1928, [Convention date]. Block, rubber, and like apparatus; disc apparatus; spindle mountings. -In a lapping-machine having a rotating upper lap 14, a stationary or rotatable lower lap 12, and a movable or stationary work cage 15, the upper lap is raised and lowered by power-operated means, provision also being made for manual operation and for varying the pressure of the lap upon the work. The lap 14 is mounted on a support 18 adjustably carried on a vertical shaft 20 by means of members 23, 24 having contact on a spherical surface 25, screws 26 serving to allow of adjustment; the members may be left free during lapping and the lap allowed to adjust itself during the working of the machine. The shaft 20 is mounted in bearings 36, 37 in a sleeve 35 slidably keyed in a housing 31, and the sleeve has thereon teeth 45 engaged by a pinion carried by a shaft 47, which carries a worm-wheel 48 driven by a worm 50 slidably keyed on a shaft 52, and pressed by a spring 54. The worm may be driven in either direction, through gearing 67, 66 from a shaft 65 adapted to be driven, through a friction clutch 70, by open and crossed belts 61, 62, the clutch member 70 being movable by an arm 73 moved by a link 76 and a hand lever 77. In order to arrest the lap at any predetermined position in its upward or downward movement, the lever 77 is provided with an arm 80 carrying a yoke member 81 which projects into the housing 31 and straddles a screw 85, rotatably mounted on the sleeve 35 and carrying a non-rotatable nut 90, adjustable by rotation of the screw. Contact of the nut, or of a collar 86 on the screw, with the member 81 moves the lever 77, throwing the clutch into neutral position. The position of the lap is adjusted by hand by a wheel 100, which may be clutched to the shaft 52, and, with the lap resting on the work, the pressure may be adjusted by rotation of the wheel which causes compression of the spring 54, with consequential increase in the pressure of the lap on the work; the spring also yields if pressure on the lap is excessive. Specification 254,919 is referred to.
GB31891/29A 1928-10-19 1929-10-21 Improvements in lapping machines Expired GB338317A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US338317XA 1928-10-19 1928-10-19

Publications (1)

Publication Number Publication Date
GB338317A true GB338317A (en) 1930-11-20

Family

ID=21872705

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31891/29A Expired GB338317A (en) 1928-10-19 1929-10-21 Improvements in lapping machines

Country Status (1)

Country Link
GB (1) GB338317A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2124114A (en) * 1982-05-18 1984-02-15 Mueller Georg Nuernberg Method and apparatus for the grinding of workpiece
GB2149330A (en) * 1983-11-04 1985-06-12 Mueller Georg Nuernberg Machining of workpieces consisting of brittle/friable materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2124114A (en) * 1982-05-18 1984-02-15 Mueller Georg Nuernberg Method and apparatus for the grinding of workpiece
GB2149330A (en) * 1983-11-04 1985-06-12 Mueller Georg Nuernberg Machining of workpieces consisting of brittle/friable materials

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