MANUFACTURE OF PISTON FOR COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To bond a cylindrical part with a lid part, and fix them to each other inexpensively in a short time. SOLUTION: A piston 22 comprises both a head part 40 to be housed in a cylinder bore 12a and a neck part 42 to be connected with a swash plate 20, set so as to be continuous thereto. The head part 40 which is a separate body from the cylindrical part 41, and is composed of a cylindrical part 41 in a covered cylindrical shape, and of a lid part 43 blocking the inner space of the cylindrical part 41. The lid part 43 is formed up integrally with the neck part 42. The cylindrical part 41 is joined with and fixed to the neck part 42 by means of a friction welding process.