Schmeiser, Olsen & Watts, LLP
Precision forming method of high-efficiency and near-net hollow valve blank of engine
A precision forming method of a high-efficiency and near-net hollow valve blank of an engine is provided, wherein the precision performing is realized by the cross wedge rolling mold, under the rolling the metal tubing for the valve deforms, with a middle part sunken and two ends elongating, the middle part forms a stem part of a hollow valve, the two ends form disk parts to be machined, and the connection sections between the disk parts and the stem part form neck parts having arced concave faces and a frustoconical lateral face in structure, achieving better consistency among the acquired hollow valve blanks. The disk part of each acquired hollow valve preformed blank is machined by the die-forging forming mold that is matched with the disk structure of the manufactured hollow valve, the hollow valve preformed blank is directly placed in the cavities of the die-forging forming mold for forging.
HUAIJI DENGYUN AUTO-PARTS (HOLDING) CO., LTD.
Y F B F B B F B
Y10T F01L B23P F01L B21J B21K F01L B21H
additional inventional inventional additional inventional inventional inventional inventional
Zhenghuan Zhengrong Wanqi Dongqiang Ge Huahuan Tao Baoyu Jinping Hongchao
Hu Zhang Qiu Mo Sun Luo Zhang Wang Liu Ji