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随着工业的不断发展,为了取得最小齿轮箱尺寸,要求传动锥齿轮具有高的硬度,甚至目前最大的弧齿锥齿轮(直径φ2500毫米)也必须渗碳淬硬。由于不可避免的热处理变形,要求热处理后有一道精加工工序来确保有效的高精度。目前所采用的方法有 (1)研齿及电火花跑合 (2)硬质合金(立方氮化硼)刀具精切 (3)磨齿对于变形小的小型齿轮,用研齿及电火花跑合法,一般可达预期效果,而对于变形较大的中、大型齿轮,即使能修正齿的接触斑点,也不可能获得高精度的齿距。用磨齿法可获得高精度锥齿轮,但需配备价值昂贵的磨齿机,且磨齿效率较低。采用硬质合金(立方氮化硼)刀具精切法,在不增加特殊设备的情况下,可获得较高精度的锥齿轮。为此,世界各国十分重视该法的研究和探讨。
As the industry continues to evolve, to achieve the smallest gearbox size, the drive bevel gear is required to have a high hardness, and even the largest bevel gear (diameter φ2500 mm) must be carburized and hardened. Due to unavoidable heat treatment deformation, a finishing process after heat treatment is required to ensure effective high accuracy. Currently used methods are (1) grinding teeth and EDM (2) Carbide (CBN) cutting tool cutting (3) Grinding small deformation of the small gear, grinding with teeth and EDM run Legal, and generally up to the expected results, and deformation of large, large gear, even if the tooth can correct the contact spots, it is impossible to obtain high-precision pitch. Use gear grinding method to obtain high-precision bevel gear, but with the need to wear expensive gear grinding machine, and lower gear grinding efficiency. Carbide (cubic boron nitride) tool cutting method, without increasing the special equipment, the bevel gear can be more accurate. To this end, all countries in the world attach great importance to the study and discussion of the law.