| 摘要 |
A programmably controllable vise has mechanisms for automatic adjustment of workpiece position relative to three orthogonal axes. The positions of the vise jaws (during clamping) establish workpiece position along a first axis, and stop members (e.g., piston actuated stops) selectively extendable from the jaws establish workpiece position along a second axis. Two levelling bars supported adjacent the jaws by respective servo-actuators (e.g., double-acting piston type actuators) which adjust the bars along the jaws establish workpiece position along the third axis, as well as workpiece tilt about the first and second axes. Because the adjustments may be made automatically, the vise may operate unattended, with workpieces being loaded and unloaded by a robot. The vise jaws preferably incorporate replaceable jaw elements which are constructed for attachment and removal by a robot and which may be machined to accommodate non-prismatic workpieces. One of the jaws may be fixed to a housing of the vise, with the other jaw being supported on a movable carriage driven by a feedback-controlled linear drive. An open side of the housing adjacent the jaws is protectively covered by a sheet metal band wrapped around the housing and having opposite ends respectively attached to the front and rear of the carriage. The band circulates around the housing with movement of the carriage, and the open side of the housing thus remains covered to avoid the entry of contaminants.
|
