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US 10,994,443 B2Granted
Diamond wire cutting method for crystal boules
AssigneeComadur SA
InventorsNaser Berisha, Roland Dechant-Wagner, Christian Russi
Life of this patent
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Abstract
Method for cutting crystal boules using diamond wire, wherein this boule is driven about a main axis, a cutting wire is held taut and driven through a temporary drum immobilising each boule in position with respect to the main axis throughout the entire cutting operation, this temporary drum being made by overmoulding a coating material on at least one boule bonded onto a sacrificial core, the cutting being followed by the slicing of cut rings from which are detached, particularly using heat, crystalline plates with parallel faces.
Claims16
A method for cutting at least one crystal boule using diamond wire, comprising:
- determining a boule axis, perpendicularly to which it is chosen to cut said at least one boule with a boule radius, and
- driving said boule about a main axis parallel to said boule axis, and a cutting wire is held taut and driven along a straight segment in a plane perpendicular to said main axis,
- wherein there is made a temporary drum which immobilises said at least one boule in position with respect to said main axis throughout an entire cutting operation, during which said boule axis is made to pass on either side of said straight segment during the cutting of said at least one boule inside said temporary drum,
- wherein said temporary drum is based on a sacrificial core formed by an axial tube or cylinder, whose axis of revolution coincides with said main axis, and whose radius is equal to a difference between an eccentricity and said boule radius, on which sacrificial core is bonded, after preparation, each said boule oriented with its boule axis parallel to said main axis, to form a bonded assembly,
- wherein, once said at least one boule is bonded onto said sacrificial core, said bonded assembly is inserted into an envelope inside which said bonded assembly is overmoulded with a coating material, which is left to cure to form an overmoulded assembly,
- wherein, after curing of said coating material, said overmoulded assembly is removed from said envelope, and tempered to obtain said temporary drum, and
- wherein said preparation of each said boule is carried out by subjecting said boule to sandblasting or micro sandblasting or peening, then cleaning it with alcohol or another solvent to remove any grease and solid particles.
4 more elements
A method for cutting at least one crystal boule using diamond wire, comprising:
- determining a boule axis, perpendicularly to which it is chosen to cut said at least one boule with a boule radius, and
- driving said boule about a main axis parallel to said boule axis, and a cutting wire is held taut and driven along a straight segment in a plane perpendicular to said main axis,
- wherein there is made a temporary drum which immobilises said at least one boule in position with respect to said main axis throughout an entire cutting operation, during which said boule axis is made to pass on either side of said straight segment during the cutting of said at least one boule inside said temporary drum,
- wherein said temporary drum is based on a sacrificial core formed by an axial tube or cylinder, whose axis of revolution coincides with said main axis, and whose radius is equal to a difference between an eccentricity and said boule radius, on which sacrificial core is bonded, after preparation, each said boule oriented with its boule axis parallel to said main axis, to form a bonded assembly,
- wherein, once said at least one boule is bonded onto said sacrificial core, said bonded assembly is inserted into an envelope inside which said bonded assembly is overmoulded with a coating material, which is left to cure to form an overmoulded assembly,
- wherein, after curing of said coating material, said overmoulded assembly is removed from said envelope, and tempered to obtain said temporary drum, and
- said temporary drum is sliced, by advancing diamond wire radially towards said main axis, at least up to a separation position, to form blanks of cut rings.
4 more elements
Dependencies are inferred from the claim text.