METHOD TO ASSESS ROUGHNESS OF PART SURFACE AND DEVICE FOR ITS REALISATION Russian patent published in 2015 - IPC G01B5/28 

FIELD: measurement equipment.

SUBSTANCE: invention relates to the field of measurement equipment, namely, to methods and devices for control of roughness of part surface by the method of acoustic emission in process of treatment or after treatment. The proposed method of roughness detection consists in the fact that they record amplitude characteristics of acoustic emission signals and using them, determine height characteristics of irregularities of part surface by comparison with a standard, at the same time the average pitch of irregularities s_m is determined according to the formula s_m=v[m/s]·T_ae[s]·10⁶ [mcm], where T_ae - average value of AE signals repetition period, and v - linear speed of feeler movement on the surface. The device for assessment of roughness of part surface comprises a body, a feeler, a sensor of feeler oscillations during touching of the surface, an electronic unit, a recording device, an indicating device, at the same time the feeler has the shape of a rod, sharpened at the angle of 60°, and is made from brass, at the same time the above feeler is inserted into the seat of an elastic element, made from spring steel, on which a piezoelement is glued, and the spring providing for stabilisation of force of feeler pressing to the touched surface, is inserted into the inner cavity of the body and is closed by the body cover.

EFFECT: increased accuracy and expansion of process capabilities of the method for assessment of roughness of part surface by the method of acoustic emission.

2 cl, 1 dwg