Study On Three-dimensional Printing Mechanism And Control Measures Of Prototype Quality

With the economic globalization, the market’s competition will be more and more ruthless and time-to-market of the products is a key success factor of the corporations. As a result, the enterprise will need more and more Rapid Prototyping (RP) equipments, which can increase the successful ratio of developing a new product, decrease the time and cost required for a new product development. Compared with other RP technology, Three-dimensional Printing (3DP) has advantages in many aspects such as processing velocity, variety of processing materials, price of equipment, cost of running and maintenance of equipment. Consequently,3DP has better developing potentialities and expansive applying foreground, and represents the developing direction of RP technologies. According to the developing trending of3DP and the need of corporations in China, the3DP was researched in this paper, and the object was to explore the mechanism of3DP and enhance the processing quality. The main content of research in the paper is as following:(1) The working principle, system component and production process of3DP is introduced in this paper, it’s also introduced the photosensitive resin’s composition and UV curing properties.(2) The spreading and reconsolidating of jetting droplets on the processing surface were studied in theory. It was calculated that the minimum resolution factor of printing in X-Y surface should be300dpi in the rapid prototyping system of3DP, it is the same to system parameter. The solidified process of materials of photosensitive resin in3DP was studied in theory, the required relationship of slicing thickness with the moving velocity of print head along X axis was educed.(3) The factors that influenced the quality of prototyping arc theoretically analyzed and determined in this paper, the emphasis is discussing the factors affect quality in prototyping process in stages. In the process of analysing about sedimentary position of droplet, through practical calculation, it is obtained that the range correction coefficient (time) should be150～200μs. (4) The factors which are coordinate direction and prototyping position affecting the dimension accuracy, the stair-step effect affecting the surface accuracy, the deformation of partial part and tiny structural defects affecting the shape accuracy are studied experimentally, finally, the success process and quality control measures are proposed.