Abstract The boring bar of a boring plate lathe is provided with a device for maintaining the concentricity of the boring bar within the workpiece. This stabilizer assembly consists of a guide mounted on a piston shaft which is resiliently mounted in a cylindrical housing. The exterior surface of the housing is threaded and is provided with an adjustment nut. The entire stabilizer assembly is fitted into a cavity in the tool head to a depth limited by engagement with the adjustment nut. The stabilizer assembly is positioned on the tool head to enable the guide to extend radially outward to engage the work surface. The resilient force which is exerted by the guide on the work surface can be set by rotation of the adjustment nut to extend or retract the housing in the tool head cavity.
A device for stabilizing the boring bar of a lathe adapted to machine an interior cylindrical surface of a hollow workpiece comprising a tool head mounted on the boring bar and a plurality of assemblies extending radially from the tool head for engaging said interior surface to support and stabilize the boring bar, each assembly including: A. a cylindrical housing slidably received in the tool head for adjustment radially of the boring bar, B. a shaft slidable axially in the housing, C. a guide mounted on the outer end of the shaft, D. spring means in the housing urging the shaft outward radially of the boring bar to engage the guide with said interior surface, and E. a flange threaded on the exterior of the housing and engaging the tool head for adjustably determining the location of the housing radially of the boring bar and thereby adjustably predetermining the resilient stabilizing forces acting against said interior surface.
Claim 2
Independent Claim
157 words
A device for stabilizing the boring bar of a lathe adapted to machine an interior cylindrical surface of a hollow workpiece comprising a tool head mounted on the boring bar and a plurality of assemblies extending radially from the tool head for engaging said interior surface to support and stabilize the boring bar, each assembly including: A. a cylindrical housing slidably received in the tool head for adjustment radially of the boring bar, B. a shaft slidable axially in the housing, C. a guide mounted on the outer end of the shaft, D. spring means in the housing urging the shaft outward radially of the boring bar to engage the guide with said interior surface, and E. a flange threaded on the exterior of the housing and engaging the tool head for adjustably determining the location of the housing radially of the boring bar and thereby adjustably predetermining the resilient stabilizing forces acting against said interior surface.
Claim 3
Dependent Claim
42 words
A device according to claim 1 in which the guides are elongate and the housings and the shafts are fixed against rotation on their axes extending radially of the boring bar for orienting the guides for engagement lengthwise along said interior surface.