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过去在牛头刨床上刨齿条,用横向走刀丝杠上的刻度盘分齿。由于齿条周节为mπ,按公制计算都是小数,而刨床刻度是公制单位,分齿读数十分麻烦,也不准确。刨齿条分度装置的丝杠螺距是2π。转一周为2π,如将刻度盘分成八等分,每格为(1/4)π,转换成齿条周节分度的尺寸,就使度盘上的读数变成整数格,既方便又准确。如图所示,刨齿条分度装置的支架固定在牛头刨床工作台上,丝
In the past planing rack on the shaper, with a cross-cutting screw on the dial on the teeth. As the rack circumference mπ, according to the metric system are decimal, and planing scale is the metric unit, sub-tooth reading is very troublesome, not accurate. The gear pitch of the gear rack indexing device is 2π. Turn a week to 2π, such as the dial is divided into eight equal parts, each grid (1/4) π, into the rack circumference indexing size, make the dial readings into an integer lattice, both convenient accurate. As shown in the figure, the bracket of the gear rack indexing device is fixed on the workbench of the shaper, the wire