Abstract: A double disc surface grinding machine includes a clamp band which has a non-circular outer circumferential portion. The clamp band is attached to an outer circumferential surface of a work and is housed, under the attached state, in a storage portion which has a non-circular inner circumferential portion engageable with the outer circumferential portion of the clamp band, movably in a first direction. A rotation drive unit rotates the storage portion around a first rotation shaft extending in the first direction, to make the inner circumferential portion of the storage portion engage with the outer circumferential portion of the clamp band, thereby rotates the clamp band and the work together with the storage portion. At least one of the grinding wheels is fed onto the work so as to sandwich the work with a pair of rotating grinding wheels for grinding two main surfaces of the work.

Abstract: A double disc surface grinding machine includes a clamp band which has a non-circular outer circumferential portion. The clamp band is attached to an outer circumferential surface of a work and is housed, under the attached state, in a storage portion which has a non-circular inner circumferential portion engageable with the outer circumferential portion of the clamp band, movably in a first direction. A rotation drive unit rotates the storage portion around a first rotation shaft extending in the first direction, to make the inner circumferential portion of the storage portion engage with the outer circumferential portion of the clamp band, thereby rotates the clamp band and the work together with the storage portion. At least one of the grinding wheels is fed onto the work so as to sandwich the work with a pair of rotating grinding wheels for grinding two main surfaces of the work.

Abstract: A double disc surface grinding machine (10) includes work holding section (65) for holding an inner circumferential surface of an annular work (W) at a plurality of locations. The work holding section (65) includes a plurality of holding members (66) extending radially as viewed from a rotation shaft (46). Each holding member (66) is movable outward and inward radially of the rotation shaft (46), and is contactable to the inner circumferential surface of the work (W). The position adjustment section (76) connects the rotation shaft (46) and the work holding section (65) with each other, and adjusts a position of the work holding section (65) in the radial direction of the rotation shaft (46). While the inner circumferential surface of the work (W) is held by the work holding section (65), the rotation shaft (46), the position adjustment section (76), the work holding section (65) and the work (W) are rotated integrally with each other around the rotation shaft (46).

Abstract: A double disc surface grinding machine (10) includes work holding section (65) for holding an inner circumferential surface of an annular work (W) at a plurality of locations. The work holding section (65) includes a plurality of holding members (66) extending radially as viewed from a rotation shaft (46). Each holding member (66) is movable outward and inward radially of the rotation shaft (46), and is contactable to the inner circumferential surface of the work (W). The position adjustment section (76) connects the rotation shaft (46) and the work holding section (65) with each other, and adjusts a position of the work holding section (65) in the radial direction of the rotation shaft (46). While the inner circumferential surface of the work (W) is held by the work holding section (65), the rotation shaft (46), the position adjustment section (76), the work holding section (65) and the work (W) are rotated integrally with each other around the rotation shaft (46).