DEVICE FOR MACHINING CURVED SURFACES Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: device has a stack of parallel tools mounted for permitting mutual movement inside the housing made up as a sleeve and provided with a passageway for discharging and supplying fluid and piston built in the housing that transmits the same fluid pressures to the tools and arrests access to the surface to be machined for fluid. In addition piston is composed of members arranged parallel and coaxial to the tools. The number and geometry of the cross-sections of the members of the piston is the same as these of cross- sections of tools. The piston member is made up as a prism. The sides of the bottom portion of the prism that are in a contact with the tools are beveled. The piston members are made of metal. EFFECT: improved design. 5 cl, 1 dwg