Choose the correct method of hardware measuring tools

1.For comparison, measurement, the measurement values greater scope must be measured parameters of tolerance. According to the purposes, measuring instruments characteristics can be divided into standard gauge, limit gauges, measuring instruments and measuring assembly. Choose the measuring equipment according to the tested object is the size of the tolerance values.

2.In the measurement of form error, and measurement of measuring equipment to do reciprocating movement, head should consider hysterisis error. When the workpiece precision is high, should choose high sensitivity, high precision measurement of small hysterisis error.

3 and absolute measurement, the measurement instruments measured by measuring scope than the quantity size, but also don't vary too big. Because of the large with measuring range, small workpiece measurement instrument to measure not only economic, and the accuracy of measurement is difficult to guarantee.

4 and the surface roughness in essence, shall not use of measuring equipment to measure precision. By measuring the surface roughness measurement values to less than or equal to the surface roughness measurement instruments.

5, to thin, soft and deformation of the workpiece, should choose the measurement instruments measured force. Single or small batch production should choose gm (wantong) measurement instruments, high-volume production should be preferred special measuring equipment.