Centre-less grinder for valves - has parallel base rollers with control roller moved vertically with variable axis

摘要

The valve grinder is for centreless grinding of valves. Two base rollers (22) with parallel axes are driven, and a control roller (36) is centred above the base rollers. The control roller can be raised and lowered and the direction of its axis can be changed in order to cause the valve to be moved longitudinally in either direction. A support (37) is spaced from the base rollers and supports a different region of the valve stem. A stop (48) limits the rearward movement of the valve. The assembly for supporting and driving the valve is angularly adjustable relative to the grinding wheel (16) and is mounted on a rocking lever for movement between operative and inoperative positions.