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大家都知道,硬度机是一种精密仪器,过去在国內沒有製造过。現在中国机械工具廠試製了一批A.B.Alpha硬度机,該產品的主要零件是槓桿,它有兩档1:5的臂距(10:50及50:250公厘,見图一)。这个比例的精確度,要求不超过0.001。兹将该槓桿在試製時校验精確度的方法及其所用的檢验工具介紹如下: 该厂对1:5这个比例的確定,最初用1/1000和1/100公厘的兩只千分表來校验,但結果校验出来的槓桿没有把握,其原因是1/1000公厘的千分表容易失灵。後來針对这一缺點,設計了一件工具,利用塊規和万能电表(利用低电压)來校险1:5的比例。这样校验出來的槓桿,可達到一定
As we all know, the hardness machine is a kind of precision instrument that has not been produced in the past. Now China Machine Tool Factory trial production of a number of A.B.Alpha hardness machine, the main components of the product is a lever, it has two files 1: 5 arm spacing (10:50 and 50: 250 mm, see Figure 1). The accuracy of this ratio requires no more than 0.001. The method of verifying the accuracy of the lever during trial production and the inspection tools it uses are as follows: The factory determined the ratio of 1: 5 initially with two thousandths of a tenth of a thousandths and one hundredth of a tenth of a centimeter Table to verify, but the result is not sure the lever of the test, the reason is that 1/1000 mm dial indicator is easy to malfunction. Later, in response to this shortcoming, a tool was designed to calibrate a 1: 5 ratio using block gauges and multimeters (using low voltage). Leveraged in this way can reach a certain level