Manufacturing Functionality
admin CNC-controlled high-tech machines support prosthetics manufacturing, permitting high-quality products despite subjection to the continuing high cost pressures.
The idea for a new medical implant normally arises to meet a practical need. It is a long process before the implant is producible in quantity: Taking approximately 12 to 18 months from the first drawing, including the design and job planning, through the completed, approved implant.

“After receiving, for example, a request for a new product from an orthopedist, we first design and develop a prototype,” explained Hans-Joachim Mahr, production manager at implantcast Corp. in Buxtehude, Germany (see sidebar). “The CNC controller assumes an important function for the transfer of the CAD/CAM data to the actual production. It supports the idea and the virtual model in a workpiece that the orthopedist then can hold in his hands for the first time.”
The stock-removal process is the typical manner for manufacturing artificial bones made of titanium. At implantcast, for example, the production of hip implants runs on DMG turning-milling centers equipped with the Siemens CNC Sinumerik 840D sl.
Each implant also has an associated, specially tailored set of instruments required for the implantation. This includes, for example, a surgical rasp used to prepare the bone.
Because its powerful machine functionality is suitable for both complex single parts and large production runs, not only the quantity production, but also the production of one-offs runs on the same machine. The fast data processing of the 840D sl is a particular advantage for the standard implants produced in quantity. implantcast also offers, for particularly complicated applications such as cancer patients, the manufacturing of patient-specific implants. In this case, cutting of the implants are to the associated bone structure with the help of a CT or MRI picture. For this single part production, implantcast uses the comprehensive setup functions of the Sinumerik that permit the fast machine setup.
Powerful cycles support the programming and setup for turning-milling machines with integrated B axis. |
For example, the CNC user interface has, on all levels, self-explanatory icons that are configurable as popular keys. Furthermore, many intelligent functions are available that assist the measuring of tools and workpieces. These measuring functions can be used both for the setup and process measurement, that is, the overall quality assurance during the machining. The Sinumerik Operate user interface also integrates simple swivel commands that simplify the machine setup. Characterized by its easy handling, despite its high-level functionality is the Cycle 800’s swivel cycle. The swivel functions are available both for the swiveling in a machine axis and in an axis of the workpiece coordinate system. The CNC also handles, immediately, any required coordinate transformation.
Irrespective of the one-off or quantity run, the highest demands are on each individual medical engineering workpiece. Rigorous quality and precision standards ensure there is no letdown. Furthermore, the manufacturer is responsible for validating the complete production process, which means that even prototype construction must satisfy the same conditions as the subsequent volume runs.
http://www.onlinetmd.com/tmd1211-prosthetics-manufacturing.aspx
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In total, the project involved 38 CNC machines and 12 manual machines - moved from Dubai to Abu Dhabi – plus 15 CNC and two manual machines from North America to the UAE


OVER 150 NEW & USED MACHINES WILL BE IN STOCK AND ON DISPLAY. FOR OUR GUESTS WE WILL SERVE HICKORY RIVER BARBEQUE PORK SANDWICHES AND OKTOBERFEST BEVERAGES FROM 11 AM-6 PM each day.