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(1)上海汽车齿轮厂精锻行星伞齿轮工艺试验成功,模具寿命可以达到3000～4000次,准备进一步组织专业化生产。另外,该厂试验了园柱齿轮新工艺:精锻齿坯——热轧齿形——高速磨齿,已试生产了2000个齿轮,高速磨齿设备尚未解决。 (2)常州齿轮厂制成中频加热的热轧齿轮机床,已能轧制拖拉机上的齿轮,生产率比滚齿提高6～8倍,强度提高30%,节约钢材5～6%并可以省去复杂的齿轮加工机床和工具。该厂还将热轧后的齿轮用冷精轧法进行精加工,代替剃齿工艺,冷精轧后齿轮精度达到8～9级,光洁度▽7以上。冷精轧机体只占剃齿机1/2～1/3,而生
(1) Shanghai Automotive Gear Factory precision forging planetary bevel gear technology test success, mold life can reach 3000 to 4000 times, ready to further organize specialized production. In addition, the plant tested a new technology cylinder gear: forging gear - hot tooth profile - high-speed grinding, has been trial production of 2,000 gears, high-speed gear grinding equipment remains unresolved. (2) Changzhou gear factory made of IF heating hot-rolled gear machine, has been able to roll the tractor gear, the productivity than hobbing increased 6 to 8 times, the intensity increased by 30%, saving 5 to 6% of steel and can be saved Complex gear machining machines and tools. The plant will also be after the hot-rolled gears cold finish finishing method for finishing, instead of shaving process, cold finishing after the gear precision reached 8 to 9, finish ▽ 7 or more. Cold finished body only accounts for gear shaving machine 1/2 ~ 1/3, and students