设计一直齿圆柱齿轮的传动,怎么样选择齿轮材料,热处理方式和精度等级,载荷系数还有齿数?

2025-03-15 20:36:30
推荐回答(2个)
回答1:

齿轮材料根据工作情况选择,比如航空方面,要求齿轮轻,能传递功率大,可靠性高等等,不过一般情况下选择请过热处理刚就可以了,比如调质钢,精度等级也是一样,用在需要精密度高的地方就必须要求较高精度,7、8级精度满足一般要求。载荷系数按照是否有冲击和工作速度选择,在1~3.5之间,齿数根据不发生根切的最小齿数之上选择,最小齿数为17,然后根据传动比选择另外一个齿轮齿数,
都是自己手打的,有什么问题可以联系我,另外推荐一款软件《机械设计手册》里面海量收罗,什么都有!

回答2:

最小齿数与齿顶高系数ha*、变位系数x、齿形角α、螺旋角β有关:
zmin=2(ha*-x)cos³β/sin²α
通常所说的最小齿数17,是特指最最常见的标准直齿圆柱齿轮、外啮合、齿顶高系数为1、齿形角为20°的情况。
如果不是标准齿轮,而是变位齿轮,不是外啮合、齿顶高系数不是1、齿形角不是20°,最小齿数就不一定是17了。
例如:当ha*=0.8,x=0.15,α=20°,β=35°时,zmin≈6
希望对你能有所帮助。

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