Stress induced deformation often happens in machining the thin-walled piston cylinder for vacuum casting line of epoxy resin

which results in difficulty in machining this type of parts.The author analyzed the machining process of piston cylinder

designed machining route of important surface

refined the machining and heat treatment processes

and designed grinding clamp.As a result

the measurements of the machined piston cylinder’s size

shape and position tolerances

and surface roughness met the requirements in the drawings

thus the machining quality of the parts is guaranteed.