| 摘要 |
PURPOSE:To simplify grind of the elliptical face accurately to the theoretical values and manufacture the elliptical face as being capable of grinding in such a way that the point as shown by DE in which the end to be machined of a tool is positioned at the point separated by the distance b from the point E between the straight line as shown by DE and moved along Y axis and X axis. CONSTITUTION:The center D of a first roll 5 is on Y axis, the center E of a second roll 6 is positioned on X axis, and the span between D and E is made into a sum of the long diameter (a) and of the short diameter b in an ellipse. Second and third bearings 7, 8 are provided between the rolls 5, 6, a quadrilateral which combines the second bearing 7, joining parts 12, 15 and the third bearing 8 is constantly held as a parallelogram, a tool supporting arm 16 is fitted to the third bearing 8, and the same angular turning is secured together with a link lever 14 having the center G as its center. A tool having the end T to be machined with its lower end turned down as its actute angle is arranged at the tip part of the tool supporting arm 16, its center axis S-S is arranged in parallel with a long rod part 10 of a normal line making lever 9, and the end T to be machined is arranged so that it may be positioned on the center axis G-G of the third bearing 8. |
