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使用正弦尺测量制件角度,一般是根据被测角度的标称值α和正弦尺的工作尺寸l,计算出所垫量块的尺寸H,即H=lsinα,然后通过测量和计算得到被测角的实际值。但对于尺寸较大的制件,因为大和重,使用垫量块的方法会使量块产生较大变形,严重影响测量准确度,而且被测件在正弦尺上也不好放置。我们采用将正弦尺翻过来放在被测件工作面上的方法(注意工作面的直线性及平面性),通过测量和计算便可得到被测角的实际值。这种测量方法能够保证测量准确度,大大方便了大尺寸制件两平面间夹角的测量。测量方法如下:
The use of sine ruler to measure the workpiece angle is generally based on the measured angle of the nominal value α and the working size of the sine ruler l to calculate the amount of pad size H, ie H = lsinα, and then measured and calculated by the measured angle The actual value. But for larger parts, because of the large and heavy, the method of using the measuring block will cause large deformation of the measuring block, seriously affecting the measurement accuracy, and the measured object is not good on the sine scale. We use the method of turning the sine ruler over the working face of the DUT (pay attention to the straightness and flatness of the working face), and obtain the actual value of the measured angle through measurement and calculation. This measurement method to ensure measurement accuracy, greatly facilitate the large-size parts between the two planes measuring angle. The measurement method is as follows: