Abstract: Provided is a chuck structure, which is configured to chuck an annular workpiece from a radially outer side of the workpiece. The chuck structure includes: leaf spring members arranged at a predetermined pitch along a circumferential direction of the chuck structure so as to be symmetrical with respect to a mechanism center axis; chuck claw members mounted to distal ends of the leaf spring members, respectively; and a pressing force applying mechanism configured to apply a force of pressing the leaf spring members radially inward, to thereby elastically press the chuck claw members onto a radially outer surface of the workpiece.

Abstract: Provided is a chuck structure, which is configured to chuck an annular workpiece from a radially outer side of the workpiece. The chuck structure includes: leaf spring members arranged at a predetermined pitch along a circumferential direction of the chuck structure so as to be symmetrical with respect to a mechanism center axis; chuck claw members mounted to distal ends of the leaf spring members, respectively; and a pressing force applying mechanism configured to apply a force of pressing the leaf spring members radially inward, to thereby elastically press the chuck claw members onto a radially outer surface of the workpiece.

Abstract: A grinding device includes a dresser head (7) at the front end of a spindle (1), and a dresser tool (8) mounted on the dresser head (7) for dressing the grinder (6). The dresser tool (8) is configured such that while the workpiece (W) is being ground by the grinder (6), the dresser tool (8) is out of contact with the grinder (6), and while the grinder (6) is being dressed by the dresser tool (8), the chuck (3) is out of contact with the grinder (6). Thus it is possible to press the dresser tool (8) against the grinder (6) using relative movement between the spindle (1) and the grinder shaft (4). The dresser head (7) can be rotated by rotating the spindle (1). The grinder (6) can thus be dressed without the need to mount the dresser tool (8) every time the grinder is to be dressed.

Abstract: A grinding device is provided which includes a dressing mechanism for dressing the grinder which is simple in structure and low in manufacturing cost. The grinding device includes a dresser head (7) provided at the front end of a spindle (1), and a dresser tool (8) mounted on the dresser head (7) for dressing the grinder (6), and the dresser tool (8) is configured such that while the workpiece (W) is being ground by the grinder (6), the dresser tool (8) is kept out of contact with the grinder (6), and while the grinder (6) is being dressed by the dresser tool (8), the chuck (3) is kept out of contact with the grinder (6). Thus it is possible to press the dresser tool (8) against the grinder (6) using the relative movement between the spindle (1) and the grinder shaft (4). The dresser head (7) can be rotated by rotating the spindle (1).