Gun drill manufacturing method of employing integrated 3D printing

Abstract

The invention belongs to the technical field of gun drill manufacturing through 3D printing, and particularly relates to a gun drill manufacturing method of employing rapid integrated 3D printing for electric arc 3D printing of a drill handle and a drill stem of a gun drill, and supersonic flame 3D printing of a carbide gun drill bit. The interface properties of the drill handle and the drill stem obtained through electric arc 3D printing are superior to that of the gun drill interface welded and manufactured by a traditional method; and transition layer metal Co powder can avoid the brittleness of the interface between a low alloy layer and a medium carbon steel layer, so that the toughness of the gun drill interface is improved, the average hardness of the medium carbon steel layer is improved by 19.7%, the average hardness of the alloy steel layer is improved by 12.1%, and the tensile strength of the composite material is improved by 11.9%. According to the carbide gun drill bit obtained through supersonic flame 3D printing, the average hardness is greater than or equal to 89 HRC, and the internal organization structure is stable and uniform in distribution; flame 3D printing equipment is adopted, and decomposition of WC in the printing process can be effectively inhibited, so that the bonding strength is high, the compactness is achieved, and the wear resistance is excellent; and the manufacturing method provided by the invention has low requirements on a processing environment, and does not need a vacuum and sealed environment.

Description

technical field [0001] The invention belongs to the technical field of using 3D printing to manufacture gun drills, and in particular relates to a rapid integrated 3D printing gun drill manufacturing method for arc 3D printing gun drill handles and drill pipes and supersonic flame 3D printing carbide gun drill bits. Background technique [0002] With the development of diversification, miniaturization and miniaturization of aerospace devices, auto parts, micro-electromechanical system components and civilian products, precision and high-efficiency small deep-hole gun drilling processing technology has become an important basis for the development of emerging industries and has potential important application value , and the gun drill manufacturing technology is one of the key technologies. [0003] As an important symbol of the third industrial revolution, 3D printing (additive manufacturing technology) is an important opportunity to promote a new round of industrial revolut...

AI Technical Summary

Problems solved by technology

The traditional gun drill manufacturing process is to manufacture the gun drill bit, drill pipe and drill handle separately, and then use high-frequency induction brazing to connect the three parts into a gun drill, which is time-consuming and labor-intensive.

Inevitably, there will be problems such as lack of fusion, incomplete penetration, and reduced weld strength.

The split manufacturing of gun drills has problems such as long manufacturing cycle and unsatisfactory performance