Method and apparatus for automatically blanking out printed parts from workpiece plates

摘要

Before the blanking out process by means of a press, a workpiece plate (1) having a multiplicity of printed parts which are to be blanked out and a multiplicity of position-determining markings printed on the surface is roughly aligned in relation to the press with the aid of clamps (26). Each of the position-determining markings is arranged in the vicinity of the assigned printed part which is to be blanked out. An amount of deviation of the actual mean position of a position-determining marking from the reference position of the visual range of an optical sensor in the form of a camera (130) is detected under a flash light by the optical sensor (130). The printed part on the workpiece (1) which is to be blanked out is then correctly aligned in relation to the press. This is performed with the aid of data on the amount of deviation, which are transmitted by the optical sensor (130). A lower (144) and an upper (143) matrix half (respectively) have a through hole for the purpose of forming an optical passage for projecting a light beam onto a position-determining marking. The optical sensor (130) can be moved between a first position in which the reference position of the visual range of the optical sensor (130) coincides with the mean position of a position-determining marking in the matrix (143, 144) and a second position in which the optical sensor is located outside the matrix (143, 144). <IMAGE>