The invention relates to the technical field of
lead frame slitting devices, in particular to a
lead frame slitting device and method. Comprising a mounting plate, the mounting plate is fixedly connected with a
cutting table, the mounting plate is fixedly connected with symmetrically-distributed fixing columns, the mounting plate is provided with a winding roll, a
lead frame roll is wound on the winding roll, the symmetrically-distributed fixing columns are jointly connected with a
cutting knife in a sliding mode, one fixing column is connected with a first motor in a sliding mode, and the other fixing column is connected with a second motor in a sliding mode. And an output shaft of the first motor is fixedly connected with a
cam, the fixing column is rotationally connected with a connecting rod, and the end, away from the
cutting knife, of the connecting rod is fixedly connected with a transmission wheel. The thickness of the lead frame is detected, then the position of the first motor is adjusted, the
transmission ratio between the
cam and the transmission wheel is changed, the downward
moving speed of the cutting knife can be adjusted along with the thickness of the lead frame, and abrasion of the cutting knife in the cutting process is reduced.