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AssigneeN P S P po Hydroplastichna Obrabotka na Metalite
InventorsGeorgi K. Petkov, Nikola M. Netzov, Botyo P. Botev, Dimiter N. Bankovski
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Method of and tool for the precise and finish processing of profiled cylindrical holes in a metal workpiece, wherein the length to billet diameter ratio of the hole is larger than 3. In accordance with the method of the invention, there is preliminary chip removal along the hole being processed, and the hole is later plastically deformed by fluid fed to the deformation zone thereof under high pressure. Fluid under high pressure is also fed to the zone of chip removal and is directed toward the chips removed from the material. The tool for carrying out the method comprises guiding, cutting, deforming and sizing parts disposed in such sequence and mounted upon a tool body. The tool body is provided with a blind axial hole through which the fluid under high pressure is supplied to the deformation zone of the hole in the workpiece and to the zone of chip removal where it is directed toward the chips removed from the material of the workpiece.
A method for the precise and finish processing of a profiled cylindrical hole in a workpiece, comprising first removing chips along the hole being processed and during the removal of the chips along the hole subjecting the machined zone of the hole to plastic deformation by feeding fluid under high pressure and at a high speed into the deformation zone, whereby the fluid also removes the chips from the machined deformation zone.
A tool for the precise and finished processing of a profiled cylindrical hole in a workpiece, comprising a tool provided with a guiding, cutting and deforming parts disposed in such sequence, the body of the tool having a blind axial hole therein, said axial hole being connected through a first row of radial passages to the deforming part of the tool and through a second row of radial passages to the cutting part of the tool, said cutting part of the tool having at least two rows of cutting elements including a first row and a second row thereof and a cutting rim, in the front part of said cutting rim there being provided throttle holes connected to the second row of radial passages through a by-pass channel, and means for feeding fluid under high pressure and at a high speed into the blind axial hole in the tool and thence radially outwardly through the first row of radial passages to the deforming part of the tool, whereby the fluid subjects the machined zone of the hole in the workpiece to plastic deformation and also removes the chips from the machined deformation zone.
Apparatus for the precise and finish processing of a profiled cylindrical hole in a workpiece, comprising means for first removing chips along the hole being processed, and means acting during the removable of the chips along the hole plus subjecting the machined zone of the hole to plastic deformation by feeding fluid under high pressure and at a high speed into the deformation zone, whereby the fluid also removes the chips from the machined deformation zone.
Dependencies are inferred from the claim text.