Abstract: A forging method for producing a flanged shaft such as, for example, a crankshaft, provided at its intermediate portion with a flange with the flanged shaft being formed from a blank having a diameter which is smaller than the diameter of the shaft end portions but large enough to prevent buckling of the blank when the latter is compressed in the axial direction. The blank is placed within a closed die apparatus and is axially compressed by a punch so that it is possible to produce the flanged shaft at a high dimensional precision and at a high yield, while reducing the time and labor for finishing work conducted after the forging, without requiring any large-size press.

Abstract: An improved method of producing a scroll type compressor having an orbital scroll member and a stationary scroll member. The orbital scroll member is fabricated by a process comprising the steps of: forming an end plate and a spiral wrap separately, the end plate being composed of an upper half part having a discontinuous joining portion for joining the spiral wrap and a lower half part having an oil passage. The upper half part and the lower half part of the end plate are fixed to each other through mutual engagement between locating projections formed by a plastic work on one of the half parts and mating holes formed in the other of the half parts.