Trunnion Fixture with Drop Away Tailstock
Detailed Description: This is a hydraulic clamp trunnion fixture with a drop away tailstock. It is used on a VMC and the hydraulic supply is plumbed through the center of the rotary indexer to a rotary union mounted on the back side. Hydraulic cylinders within the trunnion "expand" forcing clamp plates outward. This secures the aluminum extrusion for the machining process. The fixture was designed to accomodate three different extrusions with common width/height dimensions but differences in overall length.
The drop away tailstock is simple and solid. Combined with the internal hydraulics for clamping, it allows the operator to quickly change out the cast tube, ultimately reducing cycle time. The rigidity added with the tailstock results in lower run time and reduced scrap.