| 摘要 |
PURPOSE:To machine an end of a wire rod into an arbitrary semi-spherical shape and in large quantities mechanically by arranging a plate with rough surface inclined to the longitudinal direction of the wire rod to be machined and repeatedly making the end of the wire rod collide with the plate with rough surface together with abrasive grains. CONSTITUTION:A specified metal cylinder 1 is prepared, and a metal plate 2 is arranged at an angle of 60 deg., for example, to the center axis of the metal cylinder 1 at an internal end of the cylinder 1. To the surface of the metal plate 2, alumina abrasive grains, for example, are blasted, and the average surface roughness is set to 40mum, for example. The metal cylinder 1 is charged with a lot of tungsten straight wires 5, for example, and is added by specified quantity of powdered abrasion grains. In addition, a space inside the metal cylinder 1 is charged with water, and both ends of the cylinder are held by leakage preventive flanges 4. The metal cylinder 1 is fixed to a mixer mill vibrator 10 and is made to rotate specified times in the circumferential direction and is reciprocated at a specified rate in the longitudinal direction. This constitution makes it possible to machine the head of the tungsten wires 5 into an arbitrary semi-spherical shape. |
