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  • Measuring Method Of Precision Machining Parts
    Dec 04, 2018

    It is also very important to examine the workpiece in the process of precision machining. What kind of knowledge do we need to know when we examine the machining of precision mechanical parts? One is to understand the inspection system of precision machining, the other is to clearly examine the method, so what are the inspection methods of precision mechanical parts processing?

    First, the measurement method of outer diameter: in the measurement of outer diameter, it is necessary to measure and record in two parts of the circumference. When the length of the same diameter is larger than 50mm, the straightness check should be made, and the working face of the cutting edge ruler should be contacted with the outside diameter bus to observe the breadth of the building, and then judge the width of the building against the standard light gap. Second, the measurement method of inner diameter: when measuring the dimension of precision machining parts, we only need to measure three parts in the circumferential direction, and make a good record at the same time. When the length of the same diameter is larger than 40mm, the cylindrical degree should be checked. In the range of the same diameter length, two positions are measured at larger intervals. The cylindrical error is calculated. Methods of measurement of outer thread. The middle diameter of outer thread is measured with thread ring gauge or three pin, and the small diameter is measured with thread ring gauge (general gauge). Methods of measurement of internal threads. Internal thread external diameters are checked with thread plug gauges (general gauges) and middle diameter threads with thread plug gauges. Fifth, the surface roughness is compared and judged by the sample comparison method. (6) flatness inspection: the method of tabulation is used, three adjustable supports are placed on the flat plate, the measuring surface of the parts is placed upward on the supporting point, and the supporting point is adjusted so that the three points are equal in height. The peak and valley value measured by the meter is the flatness error of the plane. The above six methods make us very useful in processing and testing precision mechanical parts.