WORKPIECE CLAMPING DEVICE AND WORKPIECE TRANSFER METHOD

A workpiece clamping device, comprising an integrated frame (1) and at least two clamping fixtures (3), wherein the integrated frame comprises a mounting plate (11) and a cam turntable (12); the cam turntable is pivotally connected to the center of the mounting plate, and the cam turntable can at least rotate between a workpiece releasing position and a workpiece locking position; the clamping fixtures are movably connected to the integrated frame; and each clamping fixture has one end cooperating with the cam turntable and radially moving as the cam turntable rotates, so that the other end of the clamping fixture clamps or releases the workpiece. Also disclosed is a method for transferring a workpiece. The workpiece clamping device is suitable for clamping and transferring a large-aperture plane grating, can solve the problem of cumbersome and high-risk operation during a loading process in the existing method, can achieve quick loading, stable transfer, convenient operation and stable clamping without touch