A Polishing Method of Light Curing Forming Resin Prototype with Controllable Roughness

Abstract

The invention discloses a roughness-controllable polishing method for stereolithographic resin prototype models. According to the invention, the fluid of a prepared chemical etching abrasive particle flow is used on abrasive particle flow equipment for respective polishing of the stereolithographic resin prototype models; then distilled water or deionized water is used for cleaning, surface roughness of the obtained stereolithographic resin prototype models is reduced to Ra 0.8 to 2 mu m from original Ra 8.0 to 20.0 mu m, surface roughness is uniform, texture is regular, postprocessing of the stereolithographic resin prototype models is realized, operation is simple, and labor intensity is reduced. The polishing method eliminates step effects of the stereolithographic resin prototype models, improves surface precision of the resin prototype models and does not influence dimensional precision of the resin prototype models.

Description

technical field [0001] The invention belongs to the technical field of rapid prototyping light-curing forming, and relates to a polishing method of a light-curing forming resin prototype with controllable roughness. Background technique [0002] The rapid prototyping photocuring resin prototype is formed by the principle of material accumulation. Due to the limitation of the forming mechanism, there is inevitably a step effect in the forming process. It is difficult to guarantee the final The surface quality of the product and the large surface roughness of the prototype are not conducive to the flow and filling of the slurry. At present, most research mainly focuses on how to improve the accuracy through software and hardware methods, but these methods cannot fundamentally eliminate the step effect, and the development is difficult and expensive. Therefore, it is particularly important to invent a low-cost polishing process, but the difficulties in the polishing process of...

AI Technical Summary

Problems solved by technology

[0002] The rapid prototyping photocuring resin prototype is formed by the principle of material accumulation. Due to the limitation of the forming mechanism, there is inevitably a step effect in the forming process. It is difficult to guarantee the final The surface quality of the product, and the large surface roughness of the prototype is not conducive to the flow and filling of the slurry

At present, most research mainly focuses on how to improve the accuracy through software and hardware methods, but these methods cannot fundamentally eliminate the step effect, and the development is difficult and expensive

Therefore, it is particularly important to invent a low-cost polishing process, but the difficulties in the polishing process of the light-curing molding resin prototype are: (1) the light-curing molding resin prototype is a brittle material with a complex curved surface structure; (2) the internal complex shape The cavity structure is difficult to process; (3) The light-curing molding resin has strong acid and alkali resistance. If the chemical polishing method is used alone, it will take a long time, and it is prone to swelling of the light-curing molding resin prototype and matrix plasticization and hydrolysis.

[0003] At present, the polishing process of light-cured resin prototypes is mostly manual polishing, which has a long processing cycle and high labor intensity. The polishing quality and precision are mainly controlled by the experience of the polishing operator, resulting in uneven distribution of roughness in the polishing area and chaotic surface texture.

Some foreign scholars have proposed the use of abrasive flow to polish light-cured resin parts. Abrasive flow processing is a new technology for surface polishing and deburring of workpieces with fluid viscoelastic materials (composed of carriers and abrasives). Reduce the waviness and roughness of the surface of the workpiece to achieve the finish of precision machining, but it only involves the polishing of regular-shaped light-cured resin parts, and it is difficult to process blade resin prototypes with complex internal channels. If the polishing pressure is high, complex light-cured forming The resin prototype will be deformed or even cracked. If the polishing pressure is reduced, the polishing time will increase exponentially and the efficiency will be greatly reduced. Therefore, it is not feasible to simply use abrasive flow to polish light-cured resin parts.

Images