| 摘要 |
PROBLEM TO BE SOLVED: To finish process a cylinder bore and a crank hole at high precision without increasing costs. SOLUTION: A cylinder bore 1 and a crank hole of a cylinder block 5 are processed under a condition that a dummy head 11 instead of the cylinder head is mounted on a cylinder head mounting face 5a of the cylinder block 5. A bead part 23 projecting toward the cylinder head 5 is attached to the dummy head 11 at a portion opposed to a peripheral edge of the cylinder bore 1, and a recessed part 25 is installed outside the bead part 23. When the dummy head 11 is mounted on the cylinder block 5 using a bolt, a force acting between the bead part 23 and the cylinder block 5 controls deformation of the cylinder block 5 by pressing and elastically deforming a dummy head body 13 to the bead part 23 by an actuation of the recessed part 25. COPYRIGHT: (C)2004,JPO&NCIPI
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