| 摘要 |
A fixturing or workpiece holding and clamping apparatus or device, as well as method, utilizing the viscosity increase or solidification of a magnetorheological fluid work contacting medium to secure both regular and irregular shaped workpieces for precision machining or measuring operations. The apparatus or device comprises a perforated fixture into which the workpiece is placed in a desired position and orientation. The perforated fixture and positioned workpiece are placed in an open cell containing a magnetorheological fluid which conforms to a portion of the surface of the workpiece. A magnet then applies a magnetic field to the magnetorheological fluid to increase the viscosity thereof and to solidify the fluid around the workpiece with a uniform clamping pressure, securing the workpiece in the desired position and orientation for machining or measuring operations. A clamp configured to apply a compressive force to the solidified magnetorheological fluid optionally increases the uniform clamping pressure applied to the workpiece by compressing the solidified magnetorheological fluid to further increase viscosity and solidification thereof. The solidified magnetorheological fluid attenuates vibrations in the workpiece, and reverts to a liquid state for removal of the perforated fixture and workpiece upon removal of the compressive force and the magnetic field. |
