Abstract: A component to be machined is mounted in a mounting assembly comprising first and second clamping members 10, 18 arranged to clamp the component 14 between them, and at least one attenuator 12, 16 which provides a damping effect on vibrations in the component arising from the machining The attenuator 12, 16 is in the form of a sheet or porous damping material, impregnated with machining fluid so as to form a matrix of distributed Helmholtz resonators 22-28.

Abstract: A fixture for securing a cylindrical or shell thin-walled component includes a support having one or more securing devices for securing the component to the support. The fixture also includes an inflatable pressure element which, in use, is positioned within the secured component and is adapted to press outwardly, when inflated, against a liner inserted between the pressure element and the inner thin wall of the component. The liner has one or more elastic members, which bias it against the outward expansion of the inflated pressure element. The inflated pressure element and the liner damp vibrations in the component during machining of the outer side of the thin wall.

Abstract: A group of fixtures for thin-walled shell/cylindrical components (10) while they are being machined internally and externally, has a mounting base (1) having mounting holes, positioning pins and clamps to locate one end of the thin-walled component. A supporting arbour or cylinder (5) is fixed in the base. A circular lid (12) is fixed to the supporting arbour or cylinder and has a wedged step to locate the other end of the cylindrical component for internal and external machining, or the major open end of shell component for internal machining. A pair of modified vehicle wheel inner tubes (8) are disposed around the supporting arbour or cylinder. A multi-layered sacrificial liner (7) surrounds the pressure element and is adapted to fit between it and the thin-walled components.

Abstract: A fixture for securing a cylindrical or shell thin-walled component includes a support having one or more securing devices for securing the component to the support. The fixture also includes an inflatable pressure element which, in use, is positioned within the secured component and is adapted to press outwardly, when inflated, against a liner inserted between the pressure element and the inner thin wall of the component. The liner has one or more elastic members, which bias it against the outward expansion of the inflated pressure element. The inflated pressure element and the liner damp vibrations in the component during machining of the outer side of the thin wall.

Abstract: A group of fixtures for thin-walled shell/cylindrical components (10) while they are being machined internally and externally, has a mounting base (1) having mounting holes, positioning pins and clamps to locate one end of the thin-walled component. A supporting arbour or cylinder (5) is fixed in the base. A circular lid (12) is fixed to the supporting arbour or cylinder and has a wedged step to locate the other end of the cylindrical component for internal and external machining, or the major open end of shell component for internal machining. A pair of modified vehicle wheel inner tubes (8) are disposed around the supporting arbour or cylinder. A multi-layered sacrificial liner (7) surrounds the pressure element and is adapted to fit between it and the thin-walled components.