Method of working scroll member of scroll compressor

A method of working a semi-finished scroll member for a scroll compressor, said semi-finished scroll member comprising a substantially circular end plate having an axis, a first axial end face and a second axial end face with a spiral wrap extending therefrom, said method comprising the steps of:

• working an outer peripheral surface of said end plate to provide jaw finger engaging surfaces spaced from said first and second axial end faces of said end plate axially thereof;
• forming radially directed cuts in the outer periphery of said end plate such that each cut extends between and is open in one of the jaw finger engaging surfaces and in said first end face of said end plate;
• thereafter, positioning said semi-finished scroll member relative to a machine tool having a main shaft, jaw fingers and a back-up member such that said first axial end face of said end plate is placed adjacent said back-up member of said machine tool;
• then, moving said jaw fingers of said machine tool into engagement with said jaw finger engaging surfaces of said semi-finished scroll member, respectively;
• and
• moving said jaw fingers axially of said main shaft of said machine tool toward said back-up member until said first axial end face of said end plate is urged against said back-up plate, whereby said semi-finished scroll member is firmly fixed to said machine tool and ready for machining of said second axial end face of said end Plate and of said spiral wrap thereon.