topic Hybrid Machine Design in Fusion Design, Validate & Document Forum

topic Hybrid Machine Design in Fusion Design, Validate & Document Forum https://forums.autodesk.com/t5/fusion-design-validate-document/hybrid-machine-design/m-p/5484654#M305279 Combined Additive and Subtractive Machine Additive manufacturing has come a long way in the past decade, specifically in the areas of FDM (Fused Deposition Modeling). We have seen astounding growth in methods, precision, materials, and speed. Still, certain instances occur where the desired combination of traits for a specific application aren't attainable in a single step. Here post processing such as vapor finishing, sanding, or even post machining have been used to help create parts that more fully satisfy the demands of industry.  Post machining shows perhaps the most promise for creating engineering grade parts, due to the high level of controlled precision compared to the previously mentioned methods. It is also the only process which can increase the precision of a 3D print. Up till now post machining required a second highly sophisticated machine, with additional work holding and tooling. This is the issue which this project will attempt to address. Below are my comments on Pros and Cons of Hybrid Manufacturing. Pros Increased precision Because the printed object isn't repositioned, there is no uncertainty as to its location.  The standard practice of touching off reference points can cause problems when using a 3d printed part is uncertain dimensions.   Increased Throughput by Decreased Print resolution Parts designed to be post machined can be printed faster at lower resolution, then have critical areas machined to tolerance. These parts could be thought of much like a casting, where non critical areas remain rough while other precision areas are honed within the desired tolerance.   Machined Internal Cavities At a high level of functionality, this machine could be capable of more than a 2 step process, machining geometry after any number of layers had been printed, accessing areas that would later be covered by additional material,   Cons Increased Machine Cost, Weight, and Complexity Because the system must have the all the traits needed of both a 3D printer as well as a mill, there will be certain trade offs required which will likely result in greater weight and cost, while a head that can alternate between additive and subtractive processes will be more complex than a single purpose head. It is my opinion that the benefits mentioned above outweigh the potential detriments and obstacles presented by combining these two processes into one machine. Wed, 28 Jan 2015 07:12:19 GMT nnfuller 2015-01-28T07:12:19Z