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杠杆百分表的正确使用位置是测杆轴线与测量线垂直,如不垂直则应将表的读数值乘以sinβ(或cosα)加以修正,如图1所示。本规定从理论上讲是正确的,在实际使用中一般有两种情况,一种是不考虑α角,则增大检测结果的误差;另一种是按上述规定,估读∠α(或∠β)也会对检测结果产生误差。 现介绍直接读数的修正方法。如图2所示。 (1)将杠杆百分表保持原来的测量状态(α角及测量架不作任何调整),调整块规架使其工作面与杠杆表测头接触,同时将另一测量架上的千分表与同一块规架工作面接触,并使其测杆与工作面垂直。
The correct use of the lever dial indicator position is perpendicular to the measuring rod axis and the measurement line, if not vertical should be multiplied by the readings of the table sinβ (or cosα) to be corrected, as shown in Figure 1. This provision is theoretically correct, in practice, there are generally two cases, one is not considering α angle, then increase the error of the test results; the other is based on the above provisions, the estimated reading ∠ α (or ∠β) will also produce errors in the test results. Now introduce the direct reading method of correction. as shown in picture 2. (1) The lever dial indicator to maintain the original measurement state (α angle and measuring frame without any adjustment), adjust the block gauge frame so that the contact surface with the lever probe, while the other on the measuring frame dial indicator Contact with the same block face, and make it perpendicular to the measuring rod.