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我厂产品中,有几种零件,由于形状所限,用一般标准量具不能测量,必须设计专用检具,方能达到产品工艺要求。如图1所示,要求测量尺寸266.8±0.4。因内孔有过渡圆角r,因此孔深不易测量准确。采用如图2a所示的检具测量零件,可方便地确定被测零件是否合格。检具是一个有能涨缩的三测头9的装置,利用事先选定的圆锥面内径尺寸φ44(图2c中,中间刻线与窗口尺寸对准时)和从φ39.9D5至φ55.06~(+0.10)的过渡斜角16°的关系(图2b),
I plant products, there are several parts, due to shape limitations, with the standard measuring tools can not be measured, we must design special gages, in order to meet the technical requirements of the product. Shown in Figure 1, the required measurement size 266.8 ± 0.4. Due to the transitional fillet r, the hole depth is not easy to measure accurately. Using the gage measuring part shown in Figure 2a, it is easy to determine if the part under test is acceptable. Gage is a telescopic three probe 9 device, the use of pre-selected conical surface diameter size φ44 (Figure 2c, the middle of the scale and the window size alignment) and from φ39.9D5 to φ55.06 ~ (+0.10) transition bevel angle of 16 ° (Figure 2b),