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以前我广在磨拖拉机大齿圈里孔(φ200 D~(+0.045)7)时,用里孔杠杆表测量,由于里孔大,测量面窄,操作很不方便,对表也很麻烦。后改用卡板测量,因孔径大,不易掌握,经常出现废品。1976年我们做了一个卡规表架(附图),B端为固定端,另一端装一块千分表头,用紧定螺钉固定在表架上。使用前,先用φ200~(0.005)7的标准环把千分表指针对到“0”的位置,用千分表杆伸出的长短来调节测力
I used to grind the tractor gear ring (φ200 D ~ (+0.045) 7), with the hole in the lever table measurement, due to the hole in the hole, the measurement surface is narrow, the operation is very inconvenient, the table is also very troublesome. After the switch to the card board measurement, due to large aperture, not easy to grasp, often appear scrap. In 1976 we made a card gauge frame (with photos), the B end of the fixed end, the other end mounted a dial gauge, with a set screw fixed on the table frame. Before use, first with φ200 ~ (0.005) 7 standard ring dial indicator pointer to the “0” position, using the length of the meter lever to adjust the force