JB179—83《渐开线圆柱齿轮精度》(下称新标准)采用国际标准ISO 328—75《渐开线齿轮-ISO精度制》中的公差代号和数值。虽则国际标准中没有“齿轮副的接触斑点”指标,但由于接触斑点的检验方法极其简单,且能直观地反映齿轮副的传动质量,所以对较大规格的、传递动力的齿轮更有其现实意义。为此,保留JB179—60《圆柱齿轮传动公差》(下称旧标准)中的接触斑卢指标是很有必要的。现将新标准中的接触斑点指标及其检验方法简介如下。 JB179-83 “involute cylindrical gear accuracy” (hereinafter referred to as the new standard) using the international standard ISO 328-75 “involute gear - ISO precision” in the tolerance code and values. Although there is no indicator of “contact spot of gear pair” in the international standards, the test method of contact spot is extremely simple because it can directly reflect the transmission quality of the gear pair. Therefore, it is more realistic for the larger size and power-transmitting gear significance. For this reason, it is necessary to keep the contact spot index in JB179-60 “Cylindrical Gear Drive Tolerance” (hereinafter referred to as the “old standard”). Now the new standard of contact speckle indicators and test methods are as follows.