Preparation method for U-shaped hole in casting

Abstract

The invention relates to the casting field, and especially relates to a preparation method for a U-shaped hole in casting. Molding is carried out according to a designed casting structure. A U-shaped hole core is prepared from fibers with high temperature resistance and a metal skeleton, or painting for casting is painted uniformly on a metal skeleton to prepare a U-shaped hole core. The size of the U-shaped hole core is the same as the size of the shaped hole. The U-shaped hole core is placed in the mold during the pouring process. After the casting is taken out, the U-shaped hole core is drawn out, and a U-shaped hole meeting the curvature radius of design requirements can be obtained. The preparation method is advantageous in that, the problem that a U-shaped hole cannot be cast through a conventional casting method is solved.

Description

technical field

[0001] The invention designs the field of casting, and in particular relates to a method for forming U-shaped holes with different curvatures on castings by using high-temperature-resistant fibers or coatings for casting. Background technique

[0002] The formation of U-shaped holes is difficult to achieve either by ordinary cutting or traditional sand casting methods. Therefore, the formation of U-shaped holes on parts is generally divided into two categories: one is electron beam processing technology, which uses electron beams in the magnetic field The principle of medium deflection makes it deflect inside the workpiece, and can process fine U-shaped holes. By controlling the speed of the electron beam and the strength of the magnetic field, the radius of curvature can be controlled. However, the processing efficiency of this method is low, and the processing cost will be very expensive if a hole with a larger diameter is processed; the other is to use a ...

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