| Hardness test become a popular method in material mechanics performance testing, can reflect sensitive material difference in chemical composition,organizational structures and technology for heating processing, As Rockwell hardness test ease of manipulation become a widely apply method.Tradition Rockwell hardness adopted lever to load,most of indenters need set screw impact in sidewise,it is difficult to assure precision in long-term usage, and need skills and experience of operator. So improve autoloading of Rockwell hardness method of measurement.The text particular introduced working principle of Rockwell hardness tester, designed load-up program, analyzed raliability,and according related requirements elected electromechanical and the like components. The text calculated system transfer function and increase integral element to ensure precision . On the base of the theoretical analysis utilize VC++ programming achieved online work, under control of computer made hardness tester carrying on auto detection. Finally from theory and experimentation two different directions gave detailed analyze and reckon, get Rockwell hardness system meet GB precision demand.
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