我厂生产锥度为1:50的棱形铰刀,如图1所示,是供柴油机油泵零件加工用的。过去放在正弦规上测量,操作复杂,工效不高,因此设计制造了一个带中心架的正弦尺,使工效提高了四十倍左右。图2为该量具的结构,它既具有正弦尺的测量特点,可以测量角度,又具有中心架测量特点,可以测回转体的同心度、偏心距。顶尖2安装在底座1的半圆导轨上,左右顶尖必须位于同一中心线,两侧顶尖的同心度与测量 I plant the taper 1:50 prismatic reamers, shown in Figure 1, is for diesel engine parts used in processing. In the past on the sine measurement, the complexity of the operation, the work efficiency is not high, so the design and manufacture of a sine frame with a central frame, so that work efficiency increased by about 40 times. Figure 2 is the structure of the measuring instrument, which not only has the measurement characteristics of the sine ruler, you can measure the angle, but also with the characteristics of the center frame can be measured back to the body concentricity, eccentricity. Top 2 mounted on the base of the semicircular guide rail 1, left and right top must be located in the same center line, both sides of the top concentricity and measurement