Method for manufacturing additives based on synchronous spray and adhesion

Abstract

The invention discloses a method for manufacturing additives based on synchronous spray and adhesion. The method includes the steps that according to the requirement for the appearance of a part to be formed, a three-dimensional model of the part to be formed is established, and hierarchical processing is conducted according to the machining direction; according to the requirement of the three-dimensional model for the number of base materials and adhesives, base material particles and the adhesives are placed in a powder feeder and an adhesive container respectively, compressed air directly carries the base material particles from the powder feeder without preheating and then conveys the base material particles to a base material spray gun, and meanwhile an adhesive spray gun is controlled to spray the adhesives to conduct adhesive solidification on the base materials; according to the shape of each layer section of the three-dimensional model, relative motion of the spray guns and a platform is controlled, and layer-by-layer multi-material controllable spray forming is conducted; after spray and adhesive forming of the part to be formed, a small number of particle materials which do not adhere to the surface and the internal structure are removed, and a final part to be formed is formed. According to the method, spray of the base materials and spray of the adhesives for adhesive solidification can be conducted at the same time, and the method has the advantages that the base materials are saved, cleaning is easy to conduct, energy is saved and emission is reduced.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, in particular to an additive manufacturing method for simultaneous spraying and bonding. Background technique [0002] Additive manufacturing technology uses metals, plastics and ceramics as the main raw materials, and is developing in the direction of complex structure and multi-purpose integrated rapid manufacturing. Following the technical principle of "layer-by-layer curing, layer-by-layer accumulation", common additive manufacturing technologies can be divided into three categories according to the way of curing in layers: the first category is photo-curing, such as stereolithography (SL) , scanned by ultraviolet rays, etc., make the liquid photopolymer harden into a thin layer due to photopolymerization; the second type is thermosetting, including fuse deposition modeling (FDM), selective laser sintering (SLS), electron beam melting (EBM), based on the basic principle of mel...

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Problems solved by technology

[0003] As mentioned above, the light-curing type has a narrow range of processing objects and is only suitable for liquid photosensitive polymers, and must be equipped with a light emitter corresponding to the wavelength or frequency; the heat-setting type has a solid-liquid-solid phase transition due to all materials. process, resulting in large volume changes, large residual stress and deformation, and the need for high-power laser equipment, which has high cost and low deposition efficiency; the sticky type may use a laser cutting system, which has high equipment costs and is not suitable for controlling the adhesive. Spraying, although the materials that have not been in contact with the adhesive can be reused, it is easy to cause powder to fly during cleaning and endanger human health

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