Machining method of inner peripheral surface of semi-spherical hull

Abstract

Abstract PURPOSE:To finish up the inner peripheral surface of a semi-spherical hull into a real sphere and reduce the weight by reciprocating a cutter along the inner peripheral surface between the center and edge of the inner peripheral surface of the semi- spherical hull and also rotating the semi-spherical hull by a predetermined angle around a symmetrical axis every time the cutter is reciprocated. CONSTITUTION:A semi-spherical hull raw-material 1 is fixed on the rotary table 13 of a slant rotation indexing bed 7 with its virtual center line in coincidence with the rotation center of the table 13. Then, the table 13 is inclined by 45 deg. against the horizon together with a stationary table 11, and it performs cut-machining while being shifted along an inner peripheral surface from its edge A to the center B by the ball end mill 19 of an NC horizontal boring machine 8. When the end mill 19 is shifted to B, the semi-spherical hull raw-material 1 is rotated by 0.2-0.3 deg. together with the table 13, the end mill 19 is shifted from the center B to the edge A of the semi-spherical surface and cut-machining is linearly performed on the portion displaced by 0.2-0.3 deg. from the already machined portion, and this action is repeated and the inner peripheral surface is machined.

Inventors

• 👤 Ryoichiro Sasano
• 👤 笹野　量一郎
• 👤 Tsutomu Toyohara
• 👤 力 豊原
• 👤 Kazuo Imanishi
• 👤 今西　和雄

Bibliographic Details