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JBl79—83《渐开线圆柱齿轮精度》中对评定齿轮齿距误差增加了周节偏差Δf_pt。的项目,其定义为:在分度圆上,实际周节与公称周节之差。用相对法测量时,公称周节是指所有周节的平均值。它与旧标准
JBl79-83 “involute cylindrical gear accuracy” to assess the gear pitch error increased by the deviation of the week Δf_pt. Of the project, which is defined as the difference between the actual week and the nominal week on the index circle. When measured by relative law, the nominal week refers to the average of all the weeks. It’s with the old standard