A Study on Cutting Forces buring nobbing the Middle Hardness Gears
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摘要: 滾齒機上實體滾切中硬齒面齒輪是當前具有重大經濟意義的一項加工技術。本文介紹了對硬度為HRC36～46（HB332～436）中硬齒面齒輪滾削力的測試結果,分析了各項切削條件變化對滾削力的影響,指出:HRC36～46中硬齒面齒輪的滾削力一般低于同材質軟齒面齒輪的滾剖力,在此范圍內,不同硬度齒面齒輪滾削力的變化幅度不大,但是,中硬齒面齒輪滾削力的梯度值大大超過同材質軟齒面齒輪滾削力的梯度值,因此,滾切中硬齒面齒輪時更應注意滾齒過程的動載特性。測試結果表明:在合理的削切條件下,在普通滾齒機上實體滾切中硬齒面齒輪是完全可能的。Abstract: Hobbing the middle hardness surface gears with Hss tools is one of the important machining methods. This paper introduces the experimental results of cutting forces in the gears bobbing and discusses the effect of cutting conditions on the cutting forces of bobbing process. In spite of the faet that cutting forces for bobbing the middle hardness surfuce gears （HRc36-46） are weaker than those of soft surface gears of the same material, the cutting force gradient for bobbing the middle hardness surfuee gears is much higher than that of the soft surface gears. It is suggtsted that the attention be paid to dynamic characteristics of bobbing process. Besides, the experimental result shows that it is possible to machine the middle hardness surface gears on an ordinary bobbing machine under the rational cutting conditions.
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