CASTING PRODUCT HAVING CYLINDRICAL PART AND SURFACE FINISHING METHOD FOR CYLINDRICAL PART INSIDE

Japanese Patent JP3946513

B2

PROBLEM TO BE SOLVED: To provide a surface finishing method capable of efficiently and easily surface finishing the inside of a cylindrical part in a casting product and to provide the casting product provided by the same method.
SOLUTION: A cylindrical tool 1 used is so constituted that a plurality of recess/projection finishing parts 10 formed into a recessed/projecting shape by alternately disposed with a press-fit projections 11 and groove parts 21 circumferentially are provided in the direction of the axis C1, the disposed positions of the press-fit projections 11 in the adjoining recess/projection finishing parts 10 are mutually deviated, and when perspectively observed in the axial direction, a contour formed by connecting the outer circumferential ends of the press-fit projections 10 is drawn into a circle with the diameter a little bit larger than the inside diameter D1 of the cylindrical part before the finishing. The cylindrical tool is forwarded along the axial direction in the cylinder part 81 without rotating the cylindrical tool with the axis C1 of the cylindrical tool 1 and the axis C2 of the cylinder part 81 of the casting product 8 fitted to the same line. A method for giving an appropriate rotation for the tool feed and uniformly surface-finishing the inside face is also provided.

Toshiaki Tanaka
Hideo Tachikawa
Fumio Nonoyama
Nakamura Masanori
Katsuya Murakami
Noritaka Miyamoto

JP2001392408A

July 18, 2007

December 25, 2001

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Toyota Central R & D Labs.
TOYOTA JIDOSHA KABUSHIKI KAISHA

B23D37/22; B24B39/02; (IPC1-7): B24B39/02; B23D37/22

JP62141456U
JP10094869A
JP1138613U
JP2001049397A

Yoshiyasu Takahashi
Tamiwa Iwakura

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