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Posts Tagged ‘PostProcess Technologies’

RAPID + TCT 2018: Metal and Post-Processing

Thursday, April 26th, 2018

This past week I had the pleasure of attending RAPID + TCT 2018, a conference and exhibition that showcases 3D printing/additive manufacturing with a myriad new technologies, materials, and processes. The event, put on by the Society of Manufacturing Engineers (SME) is a highlight of the year for us, and again, we came away overwhelmed (in a very good way) by all that we witnessed.

Much like last year, if there were three words to describe the SME’s RAPID + TCT 3D Printing & Manufacturing Event they would be metal, metal, and metal — machines producing metal parts were everywhere. This year marked the 28th event and seemed more like a mini IMTS than an additive manufacturing show with exhibitors ranging from material suppliers to post processors to traditional machining companies. There were, of course, the industry heavy hitters, but there were also a lot of startup companies exhibiting for the first time that made things really interesting.

Post-processing also got a lot of exposure as companies providing these technologies had more of a presence and recognizing that this important aspect of AM needs to be an integral part of the production process, and not relegated to being an afterthought.

This year’s theme was “3D In 360°,” meaning the industry is starting to come full circle in terms of capabilities and potential, and this theme was clearly evident in the technical sessions and on the exhibit show floor. This year continued a distinct change of industry direction from one-off rapid prototyping of parts to production quantities in the hundreds and even thousands.

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Whether Additive Or Subtractive, Post Processing Remains Key For Manufacturing

Thursday, May 4th, 2017

Clean up after anything is not usually an especially enjoyable endeavor, even where subtractive or additive manufacturing processes are concerned. This is where post processing comes in.

The Problem with CAD In Subtractive Manufacturing

To cut parts using a CNC cutting machine, it has to be programmed with the path of the desired shape or nest of shapes. Most parts are designed with a CAD program where they are saved in a CAD drawing format, such as DWG, STEP, or several others.

But you can’t just take the CAD file and send it to a cutting machine. It has to be interpreted first, so the CNC on the cutting machine can understand it. The problem with CAD file formats is that:

  • They usually contain a lot of information that the CNC cutting machine doesn’t need or would find confusing, such as title blocks, Bills Of Material, dimension lines, borders, welding symbols, etc.
  • They usually have multiple layers, some of which are useful to the CNC and some of which the CNC needs to ignore.
  • They sometimes have many parts in one file, some of which might need to be cut on the CNC cutter, and some might need to be machined, cast, or sent to an EDM.
  • They don’t have all of the information needed by a CNC machine. Machines need to be told when to turn a process on and off, how to lead-in and lead-out from a part, etc. All of this information is referred to as the process technology.

 

Post Processing For Subtractive Machining

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