A Casting Roll Suitable for Reducing Edge Cracks of Magnesium Alloy Casting and Rolling Sheets

Abstract

The invention belongs to the technical field of metal material machining, and particularly relates to a casting roller design suitable for reducing edge crack of a magnesium alloy cast-rolled plate. For solving the problems of the edge crack and the non-uniform performance caused by cast rolling of the magnesium alloy plate, the invention provides acasting roller shape design capable of effectively inhibiting the edge cracking of themagnesium alloy cast-rolled plate, the design is used for guiding the production of thecast-rolled plate with the thickness of 6-10 mm, an upper roller and a lowerroller are involved and a hole shape is formed through the cooperation of the upper roller and the lower roller, the roller shape of the upper roller is in a dumbbell shape with a groove, the middleof the roller is a cylindrical shape, the two ends of the roller are the cylindrical shapes with the diameter larger than that of the column of the central part, the two ends of the columnin the middle are correspondingly provided with transition arc surface grooves with the depth of H, the lower roller is in the cylindrical shape, the radius of the lower roller is the same as the radius of the columnin the middle of the upper roller, the length of the lower roller is the distance between the two faces of the inner sides of the columns at the two ends of the upper roller, and the transition arc surfaceswith thedepth H which are the same with the roller shape of the upper roller exist at the two ends of the column. In the matching process of the upper roller and the lower roller, thespecialshape rolling hole shape is generated, so that the generation of the edgecrack can be effectively reduced.

Description

technical field

[0001] The invention belongs to the technical field of metal material processing, and in particular relates to a casting roll suitable for reducing edge cracks of magnesium alloy casting and rolling plates. Background technique

[0002] With the promulgation of the national new energy vehicle and rail transit development plan, the demand for light weight of its corresponding products has been further upgraded. Magnesium alloy sheets will usher in a huge application market with their remarkable weight reduction characteristics, such as the "four doors and two doors" of automobiles. The demand for 0.5-3mm magnesium alloy sheets and strips for plates such as "cover" and inner lining boards, train inner lining boards and item racks, and mobile phone and notebook computer casings has become an important direction for the development of the magnesium alloy industry; Compared with the production of plates and strips, casting and rolling only takes a few seconds to c...

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