Designing a Parametric "Print in Place" Hinged Container Using Autodesk Fusion 360

cults3d

The eight different size and color 3D printed "print in place" hinged containers featured in this tutorial all share one thing in common; they were all produced from a single Autodesk Fusion 360 model using "parametric modeling".\n\nIn a CAD environment, a parametric model is a model whose size and / or shape can be altered simply by changing dimensional values. In this model, I specified the dimensional values in the Autodesk Fusion 360 "Change Parameters" menu for the Length, Depth, Height, Thickness and Tolerance dimensions of a simple "print in place" hinged container. I then designed sketches for the base, lid and ball and socket hinges, and extruded the various components, using the dimensional values I entered. Thus to change the length of the container, I simply change the Length dimension, to change the depth, I change the Depth dimension and to change the height, I change the Height dimension. When any of the dimensional values on the Change Parameters menu are altered, Autodesk Fusion 360 rebuilds the container to the new dimensions, creating a new model ready for 3D printing, thanks to parametric modeling.\n\nWhile designing this model, friends of mine questioned as to why I simply didn't scale the model using Cura (the slicer we use) prior to printing. The answer is when Cura scales a model, it scales everything, including the tolerances (or "clearance") between the parts. Thus when scaled up, the hinge becomes loose, and when scaled down, the hinge becomes tight, or even "welded". Parametric modeling ensures the user specified Tolerance (clearance) dimensions are maintained as the model dimensions are changed.\n\nNow the caveats, the model is not without flaws. For example, no limits have been imposed on the dimension values so entering "reasonable" values is up to the user. I suggest using values greater than or equal to those I initially placed in the Change Parameters menu. Negative values are a definite no-no, and excessive Height values in relation to the Length and Width values will cause interesting and problematic side effects. If "non-reasonable" values are entered, errors may (or may not) appear in the timeline of the model to warn that the model, with the specified dimensions, is not printable, so examine both base and lid components prior to printing. And as testing all possible combinations of dimensional values would require time far exceeding my remaining lifetime, I simply did not have the time to test them all.\n\nI've included the Autodesk Fusion 360 file "Print In Place Parametric Hinged Container v1.f3d" which includes the model details, and in the steps that follow are videos showing the steps I performed in creating this model (the videos may be slightly outdated, so stick with the .f3d file for updated details). Familiarity with the Autodesk Fusion 360 software is necessary to create a parametric "print in place" hinged container.