Sand mold for casting rotary structure casting and its manufacturing method

Abstract

The invention provides a sand mold used for casting a rotation body structure casting. The sand mold comprises a first casting unit and a second casting unit which are matched to form a cavity used for casting, an existing sand core is integrally molded on the inner surface of the first casting unit through a 3D printer, the sand core comprises a molding portion used for molding the casting and a connecting portion for connecting the molding portion with the first casting unit, and the inner surface of the second casting unit is provided with a core base matched with the connecting portion; the invention further provides a method for manufacturing the sand mold. According to the sand mold for casting the rotation body structure casting and the manufacturing method of the sand mold, the sand core can be integrally molded in the sand mold.

Description

technical field [0001] The invention relates to the technical field of casting, and more specifically, to a sand mold for casting revolving body structure castings and a manufacturing method thereof. Background technique [0002] Rotary castings such as forearm and wrist forearm are one of the key components of joint robots, and the material is mainly ductile iron. These castings usually require CT8 to CT10 dimensional accuracy, and it is difficult to control the wall thickness (10-20mm). In addition, this type of casting has many processing surfaces, and it is a small piece of thin-walled ductile iron (weight 15-100kg), which is difficult to cast. [0003] At present, the robot rotary body castings are mainly casted by wooden molds. Since the shaft-to-diameter ratio of such castings usually reaches 2.5-6, the pouring position is usually selected along the flange mid-section in the process design, and the flat pouring is used to reduce the cost. Indenter to reduce inclusio...

AI Technical Summary

Problems solved by technology

The traditional method usually uses a special shape of the core head, the core seat and the use of clamps and other tooling to help control the size, but due to gaps during casting, there are different degrees of core drift, deformation, etc., the size is still difficult to control

In addition, the requirements for the operator's skills are relatively high, which restricts the product delivery cycle

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