High-yield-strength oriented silicon steel shearing process

Abstract

The invention provides a high-yield-strength oriented silicon steel shearing method. According to the method, the tensile force for shearing band steel at a disc shear is stabilized by virtue of controlling tensile forces of an unwinder and a reeling machine, and the purpose of stably shearing is achieved by virtue of reducing shaking. The tensile force numeric area of the unwinder is 15+/-2N/mm<2>, and the tensile force numeric area of the reeling machine is 17+/-2N/mm<2>; the front and rear parts of the disc shear are respectively provided with a pair of tensile force stabilization control rolls; lateral clearances and superposition amount of the disc shear are set and subsumed into a control program by virtue of a standard setting module, so as to control the oriented silicon steel trimming quality. The shearing process is especially applicable to producing the oriented silicon steel with the yield strength of 300-330N/mm<2>, the tensile strength of 335-355N/mm<2> and the thickness of 0.22-0.33mm, improving the oriented silicon steel trimming quality, and avoiding trimming defects such as broken fracture and poor trimming, namely flying spurs and excessive burrs at edge parts.

Description

technical field [0001] The invention relates to a high yield strength oriented silicon steel shearing process. Background technique [0002] Oriented silicon steel is an electrical steel in which the easy magnetization direction of grains is parallel to the rolling direction and the silicon content is about 3%. Oriented silicon steel can be divided into two categories: general oriented silicon steel and high magnetic induction oriented silicon steel. It is mostly used in the field of electric energy transmission (such as transformers, etc.), and is an indispensable important metal functional material for electric power, electronics and military industries. Oriented silicon steel is one of the important products in metallurgical products, and its production level and product quality represent the development level of a country's iron and steel industry. Oriented silicon steel is known as steel art, with high technical content and complex process. Whether or not to master the...

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Problems solved by technology

[0020] However, the methods listed above mainly involve the edge trimming control scheme of ultra-low carbon mild steel, which is different from the edge trimming control of grain-oriented silicon steel products described in the present invention.

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