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一、前言 工作洛氏硬度计的试验力分为初试验力、主试验力、总试验力。初试验力的产生分两种形式:一种是由弹簧的张力产生,而另一种是由包括主轴系统自重、负荷杠杆部分和重铊组合产生。试验力是加在硬度计主轴上,主杠杆的刀子为圆柱型刀体,其两边分别由左右两个螺钉固定。这部分出厂时已经调整好了,但由于长时间的使用以及螺钉的松动,这部分有时也可能出现问题,由于臂比变化。造成总（主）试验力超差或严重超差的不良现象。出现这种现象后,如果只用调整示值杠杆上面的调整块来调整,有时调整块会近于极限位置。结果造成C标尺高、中、低值对不起来的现象。而且调整块偏离中心位置（5:1）愈远,愈是对不起来。
First, the preface Rockwell hardness test force is divided into initial test force, the main test force, the total test force. The initial test force occurs in two forms: one is generated by the tension of the spring, and the other is caused by the combination of the weight of the spindle system, the load lever and the heavy thallium. Test force is added to the durometer spindle, the main lever of the knife for the cylindrical body, the two sides were fixed by two screws. This part has been adjusted from the factory, but due to prolonged use and loose screws, this part may sometimes have problems due to arm ratio changes. Resulting in the total (main) test of the ultra-poor or serious over-poor bad phenomenon. This phenomenon, if only by adjusting the adjustment lever above the adjustment lever to adjust, and sometimes adjust the block near the limit position. As a result of C scale high, medium and low value of the phenomenon can not be. And the adjustment block away from the center position (5: 1) farther, the more can not get up.