Future of CNC

Beyond next-generation computer numerical controls (CNC), there may be virtual reality for CNC programming, advanced CNC intelligence, and advanced automation and programming for additive manufacturing and robotic assembly of microstructures. Each article has more information and images online.

10/17/2013


3D printing, also known as additive manufacturing, has been incorporated into the engineer and build phases of James Tool workholding devices and other products. A printed model is in the foreground, and the background is a Stratasys Dimension 1200ES mach

Beyond next-generation computer numerical controls (CNC), there may be virtual reality for CNC programming, advanced CNC intelligence, and advanced automation and programming for additive manufacturing and robotic assembly of microstructures. Each article below is linked to more information and images.

 

Additive manufacturing used for hydraulic workholding

Case study: James Tool Machine & Engineering Inc. uses 3D printing for workholding manufacturing. The company president said the days are numbered for subtractive manufacturing processes (cutting machine tools).

 

Assemble big structures from small interlocking pieces

MIT researchers invent a new approach to assembling big structures — even airplanes and bridges — out of small interlocking composite components (see photos). A robotic system for assembly (see video and photos) is under development.

 

Additive manufacturing, 3D printing, needs CNC precision

3D printers vary in technology and come in many shapes and sizes; few use sophisticated motion control and feedback that could increase precision and speed. This is the print mechanism of a CubeX Duo by Cubify 3D Systems (www.Cubify.com), at Inside 3D PriThe heir-apparent to subtractive manufacturing is additive manufacturing or 3D printing. In subtractive manufacturing, materials are removed to form a part, often with the automated precision assistance of computer numerical control (CNC). Some additive manufacturing machine designs do not use sophisticated motion controls, and some applications could benefit from additional precision. Additive manufacturing has expanded beyond plastics to print metal, including stainless steel and titanium, now used for finished parts in many cases.

Additive manufacturing uses varied technologies and ranges in sophistication and size (even desktop or personal 3D printers). Lower-end machines observed at a recent 3D printing show didn’t use position sensors to provide feedback to motors used for positioning, motors used for positioning seemed to be stepper motors (generally less precise than servo motors), and the controls and human-machine interfaces appeared less sophisticated than those of CNC machines. On the high end, 3D printing is expanding to aircraft large-structural part sizes.

CNC manufacturers, with advanced automation experiences, have opportunities for expansion in the growing additive manufacturing market, which has potential to be larger than the CNC market by eventually printing sophisticated multi-material assemblies. Other advanced automation opportunities exist in the ability to increase printing speed and precision to avoid the need for finishing or secondary processing with some materials, and advance material sciences for a finer finish in one machine.

 

Virtual reality applied for programming CNC machine tools

Figure 2: An implemented system for CNC program would allow an operator to move the virtual table and the machine tool headstock to generate the trajectory of the tool within the workpiece system. Courtesy: West Pomeranian University of Technology, ControMechatronics researchers demonstrate how future CNC machines could be designed with virtual reality elements to allow an operator to move body elements manually so motion sequences can be saved in the machine program.

 

Engineering interactionWhat do you think the future of machine tools will look like? Add your comments using the comment tools below. For a closer-term look at CNC developments, search on CNC atop www.controleng.com.  

 

- Edited by Mark T. Hoske, content manager, CFE Media, Control Engineering, mhoske@cfemedia.com. 



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