Method for forming bionic non-smooth surface of casting

Abstract

The invention discloses a method for forming a bionic non-smooth surface of a casting. The bionic non-smooth surface consists of a plurality of triangular grooves with narrow sections; and a method for forming the triangular grooves comprises the following steps of: cutting rubber triangular ribs with the section shapes as the triangular grooves to be formed on the casting from a rubber plate; gluing the cut rubber triangular ribs onto a core by using an adhesive according to the positions, directions and radians of the triangular grooves to be formed on the casting, and performing air drying and trimming; coating a thermal insulation coating on the surfaces of the rubber triangular ribs on the core; and assembling the core glued with the rubber triangular ribs in a casting mould and casting into the casting, so that the required triangular grooves with narrow sections are formed on the surface of the casting. The plurality of triangular grooves with narrow sections are arranged on the surface of the casting to form the bionic non-smooth surface. Compared with the traditional electric spark mode or machining mode, the method for forming the bionic non-smooth surface has the advantages of low cost, high efficiency, and no limitation to complicated structures.

Description

technical field [0001] The invention relates to a casting method of a casting, in particular to a method for forming a bionic non-smooth surface of a casting. technical background [0002] A large number of studies have shown that under certain conditions, biological non-smooth structures (surfaces) have functions such as viscosity reduction, drag reduction, wear resistance and noise reduction. The surface of shark skin, which is the focus of scientific research, provides us with an excellent blueprint for bionics. Sharks are one of the fastest swimmers in the sea. After a lot of experiments and research by scientists, it has been proved that compared with other non-smooth structures, triangular grooves have the best drag reduction characteristics. For the research and application of shark skin surface in recent years, with the goal of drag reduction, NASA's imitation shark skin rib structure, applied V-groove film to the surface resistance of NACA0012 aircraft, which redu...

AI Technical Summary

Problems solved by technology

Because the cross-section of the triangular groove 6 on the casting mold or on the inner wall 5 of the core box is narrow and small, the casting mold and the core box cannot be demolded or unboxed smoothly when the mold is divided, and the cross section on the casting mold or the inner wall 5 of the core box The triangular-shaped groove 6 sandwiches all or part of the molding sand or core sand, so that the convex line 4 on the mold or sand core 3 cannot be formed, or is incomplete, so that the required narrow cross-section cannot be formed on the casting 1. small triangular groove 2

[0004] In order to form narrow and small triangular grooves on the surface of the casting, it is generally formed by EDM or machining. These two methods are costly and inefficient, and cannot be operated in areas with complex structures.

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