EFFECT OF CHUCKING MOVEMENT WITH THE INDENTATION ON THE WORK-PIECE SURFACE IN CHUCK JAWS GRIPPING OF A LATHE BETWEEN AN EXPERT AND A NON-EXPERT

摘要

Analysis of depth and the roughness from the chuck jaws indentation investigated by the Olympus LEXT-OLS4000 Laser microscope. Strain gauges were used for measuring the gripping force of the jaws. The three-characteristic movements of an expert who ensured that the work-piece was kept steady and balance did not measurably affect the surface indentation of the work-pieces. The characteristic movement of the non-expert often straddled the left body to the left side while he was twisting the chuck-key has appeared the surface indentations. The depth inspection of them found the inside of surface indentation deeper than outside. Moreover, the results of a strain gauge measurement of all movements both an expert and the non-expert indicated the inside of the jaw had higher the strain than outside. Nevertheless, the results showed the most strain on work-piece surface occurred with the body movement of the non-expert.