EP0349653B1
Expired / Lapsed
EP
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Superfinishing machine with lapping film
Assignee: Nisshin Seisakusho KK
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Filing: 1988-12-23
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Granted: 1993-07-21
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Expires: 2008-12-23
Abstract
Abstract This invention relates to a superfinishing machine with a lapping film (25) which is used for superfinishing the surface (30a) to be finished of a work (30) which is either rotated or reciprocated. The rotating direction of a pair of take-up rollers (2, 3) for taking up the lapping film is switched and controlled by driving switching means (23, 24) and at the same time, a follower friction wheel (8, 9) to be driven is braked by braking means (26). Accordingly, the entire abrasive surface of the lapping film (25) can be utilized effectively and excessive pull-out of the lapping film (25) can be prevented effectively. Since the machine is equipped with press means (29) for pressing the lapping film (25) to the surface (30a) to be polished of the work (30), high precision polish faithful to the contour of the surface (30a) to be polished can be attained.
Inventors
- 👤 Michio Kinugawa
- 👤 Ryoji Inoue
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 02:54
CPC Classifications
B; B24; B24B; B24B39/00; B24B39/04; B24B33/00; B24B21/00; B24B21/004; B24B21/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
369 words
A superfinishing machine for polishing a surface (30a) of a work (30) using a lapping film (25) having a grain surface, said work surface (30a) being rotated or rotationally reciprocated, said superfinishing machine comprising:- first and second rotatable take-up reels (2, 3) for the lapping film (25), each said take-up reel (2, 3) having a respective axial shaft (4, 5); and pressing means for pressing the lapping film (25) against said surface (30a); said superfinishing machine being characterised in that said pressing means comprises an elastic pressing member (29); and in that said machine further comprises:- first and second follower friction wheels (8, 9) each attached to one end of the axial shaft (4, 5) of a respective one of said first and second take-up reels (2, 3); an oscillation member (11), said oscillation member (11) being rotatable about a pivot (10) between a first position and a second position; first and second driving friction wheels (12, 13) provided on said oscillation member (11), whereby when said oscillation member (11) is in said first position said first driving friction wheel (12) frictionally engages said first follower friction wheel (8) and said second driving friction wheel (13) does not frictionally engage said second follower friction wheel (9) and when said oscillation member is in said second position said second driving friction wheel (13) frictionally engages said second follower friction wheel (9) and said first driving friction wheel (12) does not frictionally engage said first follower friction wheel (8); first driving means (20) for rotating the first and second driving friction wheels (12, 13); driving change-over means adapted to detect the tail end of the lapping film (25) when said lapping film is taken up on one of said take-up wheels (2, 3) and to move the oscillation member from one of said first and second positions to the other of said first and second positions; and first and second braking means (26, 26) for braking the first and second follower friction wheels (8, 9) respectively, said second follower friction wheel (9) being braked when said oscillation member is in said first position and said first follower friction wheel (8) being braked when said oscillation member is in said second position.
Claim 2
Dependent Claim
33 words
A superfinishing machine according to claim 1 and further comprising:- holding means (31, 32) for holding said work (30); and second driving means (35, 36) for rotationally reciprocating said holding means (31, 32).
Claim 3
Dependent Claim
36 words
A superfinishing machine according to claim 2, wherein said holding means (31, 32) are movable in a vertical direction relative to said first driving means (20), to said driving change-over means and to said pressing means.
Claim 4
Dependent Claim
58 words
A superfinishing machine according to claim 1, 2 or 3 wherein first and second follower gears (16, 17) are mounted co-axially with said first and second driving friction wheels (12, 13) respectively, and wherein said first and second follower gears (16, 17) engage with a driving gear (22), said driving gear being driven by said driving means (20).
Claim 5
Dependent Claim
23 words
A superfinishing machine according to any preceding claim, wherein said driving change-over means comprises a driving change-over cylinder (23) and a rod (24).
Claim 6
Dependent Claim
57 words
A superfinishing machine according to any preceding claim and further comprising grinding means (48), said second driving means (35, 36) being adapted to move said work (30) from a position where said surface (30a) can be ground by said grinding means (48) to another position where said surface (30a) can be polished by said lapping film (25).
References Cited (Backward Citations)
No citation records indexed.
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