Accurate processing three -jaw ring flange terminal surface positioning fixture for blind hole

The utility model discloses an accurate processing three -jaw ring flange terminal surface positioning fixture for blind hole, the positioning fixture includes the chuck body, movable jaw and fore -set, the chuck body radially is provided with three spout for central authorities open the cylinder that has the through -hole on the circular front face of the chuck body, three movable jaw sets up respectively in the three spout of the chuck body, the interior terminal surface of movable jaw is the clamping face, the movable jaw is close to inboard up end and offers threaded hole, and the up end at the movable jaw is established through its screw end rotation to the fore -set. This novel operation process is simple, reasonable in design, and the work piece can be coiled by accurate mounting flange to adjustable fore -set setting, makes the terminal surface blind hole of processing accurate unanimous, has the scale mark of following its length direction and setting up on the fore -set, can understand that swift re