Apparatus for machining and statically balancing a large and heavy workpiece
US4197629A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1977 |
| Grant date | Apr 15, 1980 |
| Priority date | — |
| Expiry date | Oct 20, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/05
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for use in machining and statically balancing a large and heavy workpiece such as the runner of a hydraulic turbine. The apparatus includes a vertical center support column on the upper end of which is mounted a rotatable turntable. The workpiece which is to be machined and statically balanced is suitably clamped to and rotates with the turntable, the workpiece extending radially beyond the turntable so that as the turntable is rotated the workpiece is moved past a machining tool which is suitably supported along the path of rotary movement of the workpiece. The turntable is detachably secured to a composite member which comprises a bearing, such as a roller bearing, integral with a gear, such as an internal ring gear, the composite member being in underlying relation to the turntable. A pair of diametrically opposed rotary hydraulic motors are housed within the center support column, each hydraulic motor rotatably driving a pinion gear which meshes with the internal ring gear of the composite member secured to the underside of the turntable, whereby to rotatably drive the turntable. A hydraulic cylinder is carried by the center column, and a piston movable within the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.