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[Abstract]:In order to realize local micromachining of filaments, a new method of filaments grinding is proposed. Based on the analysis of the bending force of fine wire during grinding, the formula for calculating the top pressure of abrasive tool to filament is derived, and the models of pressure distribution and cutting depth distribution of abrasive particle in the contact zone between abrasive tool and filament are established respectively. According to the relation between grinding position and top pressure, the deflection adjustment method is put forward to realize the grinding of step wire and taper wire. The experiments of filaments fixed point grinding and sweep grinding were carried out with machine vision on the self-made grinding equipment. The experiment of fixed point grinding shows that the profile of fine wire grinding is parabola, and the variation rule of contour shows that the pressure in contact area is parabola distribution at the beginning of grinding, and then it tends to uniform distribution. The filament deflection plays a decisive role in material removal rate and parabola shape. The experiment of sweeping grinding shows that the equipment can process step wire and taper wire of smooth transition by controlling the parameters of deflection adjustment.
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