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齿向误差是评定齿轮接触精度的常用指标,其数随在JB179-60和JB305-67中都有规定。但是,使用某些仪器或方法测量齿向时,不能直接测出齿向误差,只能测出被测齿轮的分度圆螺旋角或基圆螺旋角;为了与我国现行齿轮公差标准取得一致,必须将所测结果加以换算。这类仪器主要有马格型齿向检查仪、蔡司万能测齿仪齿向附件等,在万能工具显微镜上用直角坐标法测量齿向也属于这种情况。图1表示的是马格型齿向检查仪的测量原理。该仪器使用齿条形测头,其齿形角等于被测齿轮的原始齿形角。测量时,将测头插入被
Tooth error is to assess the accuracy of gear contact commonly used indicators, the number with JB179-60 and JB305-67 have provisions. However, when using some instruments or methods to measure the tooth direction, the tooth orientation error can not be directly measured, only the measured helix angle or the base helix angle of the gear can be measured. In order to be consistent with the current gear tolerance standard in our country, The measured results must be converted. This type of instrument mainly Magna type Tange tester, Zeiss universal tooth gear to the attachment, universal tool microscope with the Cartesian coordinate method to measure the tooth orientation also belongs to this situation. Figure 1 shows the measuring principle of the Magneto Tooth Checker. The instrument uses a rack-shaped probe with a tooth profile equal to the original tooth profile of the gear under test. When measuring, insert the probe