Chemical polishing device and method for inner surface of 3D printing high-temperature alloy pipeline

Abstract

The invention relates to a chemical polishing device and method for an inner surface of a 3D printing high-temperature alloy pipeline, and belongs to the technical field of inner surface treatment of3D printing metals. In the chemical polishing device, the 3D printing high-temperature alloy pipeline and an acid-proof hose are positioned in a constant-temperature control tank and outside an acid liquid tank; the acid liquid tank is positioned in the constant-temperature control tank; the 3D printing high-temperature alloy pipeline communicates through an acid-proof rigid tube through the acid-proof hose; one end of the acid-proof rigid tube communicates with an acid-proof circulating pump; the other end of the acid-proof rigid tube communicates with a high-temperature alloy chemical polishing agent in the acid liquid tank; and an acid-proof valve and an acid-proof flowmeter are arranged on the acid-proof rigid tube. The chemical polishing method is achieved through the chemical polishing device and comprises the steps that the 3D printing high-temperature alloy pipeline is subjected to heat preservation for 10 min at the temperature of 50 DEG C to 60 DEG C, the chemical polishing agent is introduced into the pipeline at the flow velocity of 400 ml / min, and polishing is carried out for 20 min at the temperature of 50 DEG C to 60 DEG C. According to the chemical polishing deviceand the chemical polishing method, operation is simple, automatic circulating polishing can be achieved, flow velocity of the chemical polishing agent can be effectively controlled to be steady and uniform, the inner surface is flat after polishing, and the removing amount is uniform.

Description

technical field [0001] The invention relates to a device and method for chemically polishing the inner surface of a 3D printing superalloy pipeline, and belongs to the technical field of 3D printing metal inner surface treatment. Background technique [0002] The development of metal material 3D printing technology has made it possible to manufacture complex parts integratedly, and it has been widely used in the field of aerospace in recent years. During the 3D printing process, there will be misalignment and overflow between layers and layer stacks, which greatly increases the flow resistance of the inner surface of the pipeline structure. 3D printing pipelines are often complex in structure and highly integrated. Conventional external surface polishing methods, such as sandblasting and grinding wheel grinding, have poor accessibility, and it is difficult to polish the inner surface of 3D printed pipelines. Grinding methods such as abrasive flow polishing have small remov...

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Problems solved by technology

[0003] In order to solve the difficulty of polishing the inner surface of 3D printing pipelines and the difficulty of low efficiency, combined with the characteristics of superalloys, one of the purposes of the present invention is to provide a chemical polishing device for the inner surface of 3D printing superalloy pipelines; one of the purposes of the present invention The second is to provide a chemical polishing method for the inner surface of 3D printed superalloy pipelines

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