(19)
(11) EP 0 845 327 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.09.1998 Bulletin 1998/40

(43) Date of publication A2:
03.06.1998 Bulletin 1998/23

(21) Application number: 97120302.1

(22) Date of filing: 19.11.1997
(51) International Patent Classification (IPC)6: B24B 29/00, B24B 29/02, B24B 31/06, B24B 31/14, B24B 57/02, B24D 13/20
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 27.11.1996 JP 332865/96
27.11.1996 JP 332866/96
31.12.1996 JP 358014/96
31.12.1996 JP 358015/96
14.02.1997 JP 47369/97
14.02.1997 JP 47370/97
12.08.1997 JP 231778/97

(71) Applicants:
  • Kawasaki, Shuji
    Hamamatsu-Shi, Shizuoka-Ken 430 (JP)
  • Matsushita, Akitaka
    Hamamatsu-Shi, Shizuoka-Ken 435 (JP)
  • BBF YAMATE CORPORATION
    Hamamatsu-shi, Shizuoka-ken 430 (JP)

(72) Inventors:
  • Kawasaki, Shuji
    Shizuoka-ken, 430 (JP)
  • Matshushita, Akitaka
    Shizuoka-ken, 435 (JP)

(74) Representative: Walter, Helmut, Dipl.-Ing. 
Aubinger Strasse 81
81243 München
81243 München (DE)

   


(54) Buffing apparatus and method


(57) A wet type buffing method is practiced such that a final buffing step (G) is conducted in a buffing liquid having alkality and the remaining buffing steps (A,B) are conducted in other buffing liquid having acidity. A work buffing apparatus is constructed such that a disconnection preventive member is disposed at the foremost end of a shaft (510) for a work, the outside of a buffing wheel (520) comes in contact with the disconnection preventive member, a tightening nut (540) is threadably engaged with the buffing wheel (520), and the buffing wheel (520) is tightly fixed to the shaft (510) by displacing the tightening nut (540) along the shaft. In addition, a surface treatment conducting method is practiced such that each surface treatment is conducted after a work is subjected to barrel buffing before or after the surface treatment. Additionally, a work supporting apparatus includes a buffing medium (762) receiving container having a buffing medium received therein and a work supporting arm (792). Further, a buffing medium (762) employable for a buffing apparatus is composed of grain of soft material or small block of the soft material.






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