Three-dimensional printing model placing required support amount rapid estimation method

Abstract

The invention discloses a three-dimensional printing model placing required support amount rapid estimation method. The method comprises the following steps: inputting a three-dimensional model file, needing estimation of support amount, and support generation parameters; if the model grows along the Z axis, calculating a minimum axis parallel envelope rectangle B in an XY plane; making equidistant parallel filling lines of the X axis and the Y axis in the B and with d being an interval to obtain a series of grid units and nodes; making vertical straight lines passing the nodes respectively, calculating intersection points of the lines and the model, recording normal direction of each surface patch, where each intersection point locates, and ranking the intersection points on each line from small to big based on the Z coordinates; for the intersection points, the serial number of which is odd, if the inclination angle of one surface patch corresponding to one intersection point is smaller than a critical value, recording the distance between the point and the closest point therebelow; and accumulating the recorded line length, and multiplying the total line length and grid unit area to obtain support amount volume and outputting the support amount. The method can estimate the model required support amount quickly, and is especially suitable for model intelligent optimization placing calculation needing a lot of iteration.

Description

technical field [0001] The invention relates to the field of model support optimization in three-dimensional printing computer-aided design and manufacturing, in particular to a method for quickly estimating the support amount required for placing a three-dimensional printing model. [0002] technical background [0003] 3D printing originated from photo sculpture and landform forming technology at the end of the 19th century, and was developed and promoted in the 1980s. Since its birth, 3D printing has been defined as a revolutionary technology that subverts traditional production methods. It has become a key word leading the development trend of global manufacturing in the future. It is the greatest invention after the steam engine, electricity, and the Internet. After more than 30 years of development, 3D printing has emerged in a variety of different process forms, such as: stereolithography (SLA), laminated solid manufacturing (LOM), selective laser sintering (SLS), fuse...

AI Technical Summary

Problems solved by technology

In 3D printing, the conventional support amount calculation method is to analyze the code file after the model generates the G code. For a model with a large size, it may take a long time to generate the G code by the CAM software. Correspondingly, the support amount Calculation also takes a long time

At present, the existing technology can only obtain the amount of support required by the model by parsing the G code, but this method is not efficient, and the calculation speed becomes slower as the model size increases

Fast calculation of model support cannot be realized by relying on existing technology

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