Design method for statically indeterminate fixed beam frame with self-supporting structure

Abstract

The invention discloses a design method for a statically indeterminate fixed beam frame with a self-supporting structure. The design method specifically comprises the following steps: step 1, setting design parameters of a support a and a support b; step 2, designing the structure of the support a and the structure of the support b according to the parameters set in the step 1, and arranging the support a and the support b in parallel; step 3, setting the design parameter of a fixed beam; step 4, designing the structure of the fixed beam between the support a and the support b according to the parameters set in the step 3; and step 5, designing an upwards recessed elliptical arc arch bridge structure on the lower surface of the fixed beam according to the parameters set in the step 1 and the step 3 to obtain the statically indeterminate fixed beam frame with the self-supporting structure. The self-supporting structure designed by the method does not require to be removed after printing is finished, therefore, raw materials are saved, and the printing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and relates to a design method of a super-static fixed-end beam frame with a self-supporting structure. Background technique [0002] The fusion lamination molding technology is to heat and melt the filamentous hot-melt material, and at the same time, under the control of the computer, the three-dimensional nozzle selectively coats the material on the workbench according to the cross-sectional profile information, and forms a layer of cross-section after rapid cooling. . After one layer of molding is completed, the machine table is lowered to a height (that is, the thickness of the layer) and then the next layer is formed until the entire solid shape is formed. This processing method makes when the upper section is larger than the lower section, the extra part of the upper section will be suspended (or suspended) due to no material support, so that the extra section will collapse ...

AI Technical Summary

Problems solved by technology

[0004] At present, when printing, some people will use software to automatically add support structures for the super-static fixed-end beams. The automatically added support structures start from the printing platform where they are located, and reach the bottom of the super-static fixed-end beam structure on the platform. The consumables are serious. Moreover, the printing time is greatly increased, and some people will use software to artificially add various shapes of supports: supports such as single-arm boards or double-wall boards; however, the support structures added by the above two methods need to be integrated with the product after printing. The body is separated, and the support with sufficient strength and stability is too firmly bonded to the prototype, which is not easy to remove and easily reduces the surface quality of the prototype

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