Screw Rotor Profile Manufacturability

Effective evaluation of rotor profile manufacturability becomes a necessary step in the design stage to reduce rotor development cycle. This paper is concerned with analyzing screw rotor manufacturability using rotor profile design data. The rotor profile manufacturability is discussed from three aspects: the required minimum tool profile radius, the range of valid setup conditions, and the severity ratio which is a measure of relative tool profile load distribution. With this analysis, the rotor profile manufacturability can be quickly evaluated in its design stage. It can also be used as a design criterion to design rotor profiles for better manufacturability.