| 摘要 |
PURPOSE:To control the extended velocity of a grinding wheel by converting the cutting resistance of the griding wheel of a honing machine into electrical signals and controlling the velocity of revolution of a drive source which extends the grinding wheel in accordance with the signals. CONSTITUTION:A feed rod 13 which is prevented from revolving by a guide pin 15 which is fit in the guide groove 16 of the side surface is screwed in the external thread at the center of a body of revolution 9 which is driven by a pulse motor 2 and a grinding wheel extended rod 23 and the same cone 26 are mounted at the lower end of the feed rod 13 through a piezoelectric conversion element 25. When the pulse motor 2 first performs its high speed operation, both the feed rod 13 and the grinding wheel extended rod 23 reduce their speed quickly. As a result, a grinding wheel 27 is also extended quickly. The cutting resistance of the grinding wheel 27 which revolves by another drive source increases and the pressure applied to the piezoelectric conversion element 25 and its output signals are also increased. When the output signals exceed their preset point, the pulse motor 2 is switched into the low speed revolution by a control means 29. |
