The invention relates to a production process of a sliced type centrifugal
cast iron piston ring, belonging to the technical field of
piston rings. The production process of the slice type centrifugal
cast iron piston ring comprises the following steps of: (1)
casting a cylindrical blank of the
piston ring; (2) turning an excircle and an incircle of the cylindrical blank according to the dimensions of the incircle and the excircle of the
piston ring; (3)
slicing the cylindrical blank with the incircle and the excircle turned into rings according to the thickness dimension of the
piston ring; (4) opening the rings manufactured in the step (3) to form piston ring semi-finished products according to the piston ring dimensions needed by a cylinder
diameter on a special opening
machine tool for the piston ring; and (5) sleeving the piston ring semi-finished products opened in the step (4) on a shaping cylinder for
ellipse shaping. The production process disclosed by the invention has the technical advantages that after centrifugal
casting, incircle and excircle turning, opening and heat shaping are adopted, the piston ring has the rigidity of HRB 95-HRB 104 degrees, high material bending strength, stable elasticity,
high surface abrasion resistance and long practical life; in addition, the production process disclosed by the invention has the advantages of high production efficiency and low cost and is suitable for manufacturing the piston rings with different specifications.