The present application relates to the technical field of
machining fixture, in particular to a fixture for flatness
machining and a production method, which is suitable for the
machining of high-precision plane parts such as three-coordinate
measuring instrument air floating guide rail, precision
machine tool guide rail, marble platform, etc. The existing high-precision plane machining fixture generally has defects such as large clamping deformation, low positioning accuracy, poor universality, etc. The traditional top pressing method is easy to cause elastic deformation and springback of the workpiece, and the magnetic type fixture is limited by the magnetic
conductivity of the material. The present application adopts an innovative structure of multi-point uniform pneumatic support combined with side linkage pressing, realizes the side clamping of the workpiece by driving the transmission rod with the support bolt to drive the pressing plate, forms uniform floating support by the bottom
matrix type pneumatic support cylinder, effectively resists
cutting vibration, fundamentally eliminates clamping deformation, greatly improves the machining accuracy and clamping efficiency, and is suitable for various materials and different specifications of workpieces.