| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a cylinder block, by which proper positioning of a metal liner is carried out using its peripheral inner surface while ensuring sufficient adhesion between the metal liner and a metal that constitutes the cylinder block. SOLUTION: A bore core 21 is used, which is formed into a taper shape. A metal liner 3 is used, whose peripheral inner surface is formed into a taper shape, whose inner diameters are smaller by predetermined amounts than the outer diameters of the corresponding parts of the bore core 21, and whose inner diameter of the end part in the large inner diameter side is larger than the outer diameter of the end part in the small diameter side of the bore core 21. The bore core 21 is arranged so as to face downward. The metal liner 3 is put on the bore core 21 so that the bore core 21 is inserted into the metal liner 3 until the outer peripheral surface of the bore core 21 comes into contact with the inner peripheral surface of the metal liner 3 (as shown in Figure). The metal liner 3 is made to fall until a prescribed state of fitting between the metal liner 3 and the bore core 21 is formed, by heating and thermally expanding the metal liner 3. COPYRIGHT: (C)2008,JPO&INPIT
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