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图1所示的齿形样板在曲线磨床上加工(磨床型号M9015,武汉机床厂66年产),一般是依靠横向滑座磨削一个半角,纵向滑座磨削另一个半角(纵横滑座转角范围±45°)来控制两半角的对称度,但这限于α角约为90～130°之间的角度加工,当α角小于90°时(有的曲线磨床在α角约小于90°时仍能磨出)则只能依靠横向滑座(纵向滑座此时的转角已大于45°),将两个半角分别磨出,即加工完一个半角又调整机床加工另一个半角,这样对半角α/2的对称度及小头尺寸L和样板两面形状尺寸的精度就很难保证,因为一次装夹加工完整个形状是不可能达到要求的。如果是单件加工,则可能在计量室配合下反复加工,测量数次可达到要求。如果是多件加工,即使在计量室配合下,也很难达到要求。
The tooth profile shown in Figure 1 is machined on a curved grinder (grinder model M9015, produced by Wuhan Machine Tool Works 66), usually by one and a half corners on a horizontal slide, the other on a vertical slide (the vertical and horizontal slide corners Range ± 45 °) to control the symmetry of the two half-angles, but this is limited to the angle α angle of about 90 ~ 130 ° between the angle processing, when α angle is less than 90 ° (some curve grinder α angle less than 90 ° Can still grind out) can only rely on the lateral slide (vertical slide seat at this time the angle is greater than 45 °), the two half-angle were grinding out, that is, processing a half-angle and adjust the machine to process the other half-angle, The symmetry of α / 2, the size of the small head L, and the shape and size of both sides of the template are difficult to guarantee because it is impossible to achieve the desired result in a single process. If it is a single piece of processing, it may be in the measurement room with repeated processing, measuring several times to meet the requirements. If it is multi-piece processing, even in the measurement room with the match, it is difficult to meet the requirements.