Forming Technology of the Fan-shaped Lightening Holes in Wood Pattern for Casting

Author of the article:SUN Hui1 , CAO Zhanlong2 , GUO Xinling1

Author's Workplace：1. School of Material Engineering, Shaanxi Polytechnic Institute, Xianyang 712000, China; 2. Baoji Oilfield Machinery Co., Ltd., Baoji 721002, China

Key Words：wood pattern; core box; fan-shaped lightening hole; numerical control machining

Abstract：According to the structural characteristics of various fan-shaped lightening holes on the wheel body, the forming technology suitable for various fan-shaped holes was studied and summarized. According to the years of model making experience of the team, five kinds of processing technologies and characteristics of the wood mold, including general milling, general milling and model machining, integral machining, four-section machining and numerical control programming machining were analyzed. The processing technology suitable for the fan-shaped hole of large wheel body, the fan-shaped hole with the distance between hub and flange less than 50 mm and the fan-shaped hole with the distance between hub and flange greater than 50 mm are determined, which ensure the processing quality and molding efficiency of the fan-shaped hole of various structures.