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在产品加工过程中,常会碰到轴、孔类键槽。对轴类键槽,一般采用轴用键槽塞规或游标卡尺测量;对孔类键槽,大都采用孔用键槽塞规测量,但用塞规测量孔内键槽不太方便。现介绍一种用改制涨簧式内径百分表测量轴、孔键槽的方法。涨簧式内量表一般带几个测头(形状如图1)。为了测键槽,可把原来的测头修磨成如图2的形状。测头的两测点应紧靠端面,这样便于测量键槽的根部。为了保证测量准确,可按键槽公称尺寸加工不同技术规格的校准环规,也可利用量块附件组成需要尺寸,用来对零位。操怍方法:用量块附件组成被测键槽公称尺寸,校对零位后,即可测量,从指示表中读出偏差值。我厂采用Φ10～20mm内径量表测头组,改制成6、8、10、16(mm)等四种规格的测头。
In the product processing, often encounter shaft, hole-type keyway. On the shaft keyway, the general use of shaft keyway plug gauge or vernier caliper measurement; keyway on the hole, most of the hole with a keyway gage gauge, but with the gage gauge hole keyway is not very convenient. Is now introduced with a modified spring-type dial gauge dial shaft, hole key way. In general, spring-loaded gauges have several probes (shape shown in Figure 1). In order to test the keyway, the original stylus can be ground into the shape as shown in FIG. 2. The two measuring points of the probe should be close to the end face, which is convenient for measuring the root of the keyway. In order to ensure accurate measurement, press the nominal size of the key groove processing of different specifications of the calibration ring, you can also use the amount of block accessories required size, used to zero. Method of operation: the amount of block accessories form the nominal size of the keyway, proofreading zero, you can measure, read out the deviation from the indicator value. I plant Φ10 ~ 20mm diameter gauge probe group, transformed into 6,8,10,16 (mm) and other four specifications of the probe.