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How to apply li of family name sclerometer correctly to measure a technology to
From;    Author:Stand originally
Technology of test of family name hardness is hardness of cloth of the afterwards on international, the name of a river in Shaanxi and Henan provinces, dimension, Shore in later a kind of technology of new development, the hardness that changed a tradition checks instrument of li of family name hardness that theory of hardness of the family name in the basis makes method. Because hardness sensor is small,be like a pen, can the hand grasps the hardness that sensor is producing the spot to have all sorts of way to workpiece directly to detect, because this is place of appearance of other table hardness,be competent hard. From in since appearance of family name hardness is born, in the world popularize degree wider and wider. Be in China, technology of family name hardness already had preliminary development in, to popularize this one advanced technique, consult international standard, machinist trade department already promulgated ZBN7l010-90" of condition of technology of appearance of hardness of the family name in " , supervisory bureau of national quality technology already promulgated GB/T17394-1998" of method of experiment of hardness of the family name in " metal.

, what is li of family name hardness

The idea of family name hardness is advanced by Swiss Dr. Dr.DietmarLeeb in, it is law of trial of a kind of dynamic hardness. The concussion body of hardness sensor is in in pounding a process with the workpiece that be measured, when be apart from workpiece surface 1mm rebound speed and the ratio that pound speed are multiplied with 1000, the definition is value of li of family name hardness, express li of family name sclerometer to calculate formula to be as follows with HL:

HL=Vb/Va × 1000

Vb: Xing Jing blows  Yu?

Va: ? of Yu of Liang of Xing condition awake

2, li the characteristic of appearance of family name hardness

1, Shore reachs li of family name hardness to all be belonged to dynamic test law, but what Shore makes an on-the-spot investigation is the perpendicular height that concussion body rebounds, because this decided Shore hardness appearance wants perpendicular use downward, this certainly will causes very big limitation in be used actually; li of family name is different, what the family name makes an on-the-spot investigation in is to pound body to rebound with percussive speed, amend through speed, can use on aleatoric direction, the person that went to the lavatory to use greatly.

2, the cloth that uses normally, the name of a river in Shaanxi and Henan provinces, diamond pyramid hardness plan. Because volume is huge, do not facilitate use in the spot, when needing to check big, heavy work especially. Because sclerometer workbench cannot be accommodated, cannot detect at all so. appearance of li of family name hardness need not workbench, its hardness sensor is small be like a pen, usable hand is operated directly, no matter be big, the work with heavy work or geometrical intricate dimension detects easily.
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