Fan-shaped forged piece and precision forging process for same

• Main Authors: XIN XUANRONG, HE CHENGSONG, SHI ZHIXIN, SHI SONGHUA, LIU XINCHENG
• Format: Patent
• Language: Chinese; English
• Published: 01.05.2013
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; FORGE FURNACES; FORGING; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HAMMERING; HEATING; LIGHTING; MECHANICAL ENGINEERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PRESSING METAL; PUNCHING METAL; RIVETING; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

The invention discloses a precision forging process for a fan-shaped forged piece. The fan-shaped forged piece is a fan-shaped worm gear which is one of parts in a high-voltage switch operating mechanism. The precision forging process comprises a step of preparing a bar stock; a step of heating the bar stock to 760 to 900 DEG C; a step of placing the bar stock into a pre-forming die, and forming pre-formed blank; a step of heating the pre-formed blank to 760 to 900 DEG C; and a step of placing the pre-formed blank into a final forming die, and forming a finally formed blank fan-shaped worm gear with an outer-circle flange and a center hole. The invention also discloses a large-angle fan-shaped worm gear and a small-angle fan-shaped worm gear, which are forged by the process, wherein the large-angle fan-shaped worm gear has a sector angle of 135 degrees, and the small-angle fan-shaped worm gear has a sector angle of 120 degrees. The fan-shaped worm gear is manufactured according to an actual operation fixing w