PRODUCTION OF BEVEL GEAR

摘要

PURPOSE:To improve the mass productivity and accuracy of a product by forming a tooth profile part by its forging from a heated blank, then executing warm sizing in forged preheating state and after nonoxidizing normalizing and shot stages executing cold sizing. CONSTITUTION:A beveling part is formed with cold forging 5 on the blank 4a subjected to bonderiging in advance and heated at the specified temp. to execute warm side forging 7. Piercing and sizing 8 are then executed simultaneously at warm temp. with the remaining heat state of 600-850 deg.C on the bevel gear 7a forming a tooth profile part 7b. And after executing a nonoxidizing normalizing 9 and shot 10 on a bevel gear 8a a product gear 11a is formed with cold sizing 11. Since the cold sizing 1 is executed once again after the warm sizing 7 the forming is reasonably executed. The mass productivity and accuracy of a produce are therefore improved.