公开(公告)号：US20190301395A1

公开(公告)日：2019-10-03

申请号：US16260088

申请日：2019-01-28

Applicant: Bin Zhou Donghailong Piston CO,LTD

Inventor： Weibin ZHANG ,  Jianjun LIU ,  Jinyu JI

IPC: F02F3/00 ,  F02F3/18 ,  F02F3/26

Abstract: Disclosed are a welded integral forged steel piston and a manufacturing process thereof. A piston head and a piston skirt are fixedly connected. A closed cooling oil cavity is formed between the piston head and the piston skirt. The cooling oil cavity is communicated with the outside through an oil inlet and an oil outlet. The bottom end of the piston head is concentrically provided with annular inner welding shoulder A and outer welding shoulder A. The top end of the piston skirt is concentrically provided with annular inner welding shoulder B and outer welding shoulder B which are respectively matched with the inner welding shoulder A and the outer welding shoulder A. The present invention provides a welded integral forged steel piston with reasonable structure, safety, reliability and high production efficiency, and a manufacturing process thereof.