MILLING HEAD Russian patent published in 1994 - IPC

FIELD: machine-tool industry. SUBSTANCE: housing 2 accommodates two pressure power cylinders with rods carrying rigidly secured block 5, which consists of pressure member 6 bearing bushing 7 and retaining device made in the form of iris diaphragm. Secured on lower surface of block 5 is retaining air cylinder 12 with spring-loaded rod responsible for actuating diaphragm blades through ring 11. Upper part of pressure member 6 has channels intended to pass compressed air into annular aerostatic support 13 formed by end face surface of pressure member 6 and adjacent surface of block 5. Pressure member 6 is provided with hole 14 located below aerostatic support plane and intended for disposal of chips and dust. EFFECT: improved efficiency. 3 dwg