A machine tool includes a first support disk and a first working disk. The first working disk defines a clamping surface and is fastened to the first support disk. A counter bearing element is positioned relative to the first working disk such that a working gap is formed between the first working disk and the counter bearing element and is dimensioned to accept a flat workpiece. A first clamping arrangement clamps the clamping surface of the first working disk to the first support disk such that the clamping surface faces away from the working gap. At least one decoupling element is positioned to at least one decoupling element configured to reduce friction between the first support disk and the first working disk.

A machine tool includes a first support disk and a first working disk. The first working disk defines a clamping surface and is fastened to the first support disk. A counter bearing element is positioned relative to the first working disk such that a working gap is formed between the first working disk and the counter bearing element and is dimensioned to accept a flat workpiece. A first clamping arrangement clamps the clamping surface of the first working disk to the first support disk such that the clamping surface faces away from the working gap. At least one decoupling element is positioned to at least one decoupling element configured to reduce friction between the first support disk and the first working disk.

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.

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.

A method for manufacturing a disk-shaped glass plate in which shape processing is performed on an edge surface of the glass plate includes processing the edge surface into a target shape by irradiating the edge surface with a laser beam while moving the laser beam relative to the edge surface in a circumferential direction of the glass plate. A cross-sectional intensity distribution of the laser beam with which the edge surface is irradiated is a single mode, and W1>Th holds true and Pd×Th is in a range of 0.8 to 3.5 [W/mm] when a width of luminous flux of the laser beam in a thickness direction of the glass plate at an irradiation position of the edge surface is W1 [mm], a thickness of the glass plate is Th [mm], and a power density of the laser beam is Pd.

The present invention provides an apparatus for working oppositely arranged first and second surfaces of a pressing section. The apparatus comprises an upper working unit forming a top wall and an upper sidewall extending downwardly from the top wall; a lower working unit forming a bottom wall and a lower sidewall extending upwardly from the bottom wall; and an inflatable bellows movable between an inflated state and a deflated state by inflation with an inflation medium. The upper sidewall is arranged to guide the lower sidewall to thereby form an internal space enclosed by the top wall, the bottom wall, the upper sidewall, and the lower sidewall. The inflatable bellows is arranged in the internal space to facilitate variation of the distance between the top wall and the bottom wall during relative movement between the upper sidewall and lower sidewall by inflation of the inflatable bellows.

The present invention provides an apparatus for working oppositely arranged first and second surfaces of a pressing section. The apparatus comprises an upper working unit forming a top wall and an upper sidewall extending downwardly from the top wall; a lower working unit forming a bottom wall and a lower sidewall extending upwardly from the bottom wall; and an inflatable bellows movable between an inflated state and a deflated state by inflation with an inflation medium. The upper sidewall is arranged to guide the lower sidewall to thereby form an internal space enclosed by the top wall, the bottom wall, the upper sidewall, and the lower sidewall. The inflatable bellows is arranged in the internal space to facilitate variation of the distance between the top wall and the bottom wall during relative movement between the upper sidewall and lower sidewall by inflation of the inflatable bellows.

A manufacturing method of a carrier for a double-side polishing apparatus, including: preparing a carrier base material and insert thicker than the carrier base material, inserting the insert into a holding hole so as to protrude the insert from both sides of the front surface and back surface of the carrier base material, measuring each of a front protruding amount of the insert protruded from front surface of the carrier base material and a back protruding amount of the insert protruded from back surface of the carrier base material, setting each rotational speed of the upper turn table and lower turn table in starting-up polishing of the carrier so as to decrease the difference between the front protruding amount and back protruding amount, and a starting-up polishing step to subject the carrier to starting-up polishing at each set rotational speed of the upper turn table and the lower turn table.

A manufacturing method of a carrier for a double-side polishing apparatus, including: preparing a carrier base material and insert thicker than the carrier base material, inserting the insert into a holding hole so as to protrude the insert from both sides of the front surface and back surface of the carrier base material, measuring each of a front protruding amount of the insert protruded from front surface of the carrier base material and a back protruding amount of the insert protruded from back surface of the carrier base material, setting each rotational speed of the upper turn table and lower turn table in starting-up polishing of the carrier so as to decrease the difference between the front protruding amount and back protruding amount, and a starting-up polishing step to subject the carrier to starting-up polishing at each set rotational speed of the upper turn table and the lower turn table.

The invention relates to an assembly for loading parts to be treated into a single-side or double-side treatment machine, comprising—a part holder in the form of a plate for holding at least one part to be treated, comprising a second side and first side, said first side being flat, and said part holder delimiting at least one through-hole forming a cell for housing at least one part to be treated, and a film mounted on the first side of the part holder opposite said through-hole, allowing said part to be treated to be held at least during the loading step.