The method of oriented silicon steel to improve the magnetic properties through the pneumatic press score

The present invention discloses an oriented silicon steel magnetically energy by a pneumatic press score improved to determine the score of the needle trajectory depending on the design of the silicon steel sheet score line number, length, angle and spacing requirements, the score needle with silicon the distance between the sheet was adjusted to 0.1-0.5 mm, the driving score needle according to trajectory determined, while controlling the score needle by air pressure 1.0-1.6MPa in the silicon surface to the frequency of vibration 70-90Hz, whereby the silicon surface score line or scoring points. According to this aspect of control of process parameters, can be obtained iron loss magnitude 8-12%, and can withstand 800 ℃ / 2h stress relief annealing effect. Unlike high gear rolls indentation method tooth roll process precision and difficult to achieve, the scoring head of the present invention is easily processed needle, and the needle used for a long wear only grinding to the grinding wheel machine, easy maintenance, and low maintenance costs.