How CNC machining makes medical parts
Items manufactured by CNC machining in medical parts processing plants include various surgical instruments used in medical operations, such as trocars (percutaneous devices), bone drills, and saws. When using CNC machining, parts are usually milled using 3 to 5 axes or turned using a CNC lathe with active tools.
The most common types of machines used in the medical parts manufacturing process include CNC milling, lathe machining, drilling, and computerized milling. Reliability and high quality are the top priorities in medical parts processing, so the medical device industry has put forward new requirements for professional precision tools. Difficult-to-process materials, complex workpiece shapes, and frequent CNC small-batch production have put forward high requirements for tools used to process professional medical devices. Mainly manifested in:
1. The requirements for CNC machining machine tools are relatively high
Advanced medical device processing equipment such as Swiss automatic lathes, multi-spindle machine tools, and rotary tables are completely different from the commonly seen machining centers and lathes. They are very small in size and very compact in structure; in response to such requirements, the structure of the tool also needs to have a special design, requiring the tool size to be very small, while also ensuring the rigidity of the tool.
2. High requirements for CNC processing efficiency
For medical devices, the most important thing is processing efficiency, that is, processing rhythm, which requires that the blade can be replaced in the shortest time.
3. From the perspective of the workpiece itself, it is very different from other mechanical parts; medical devices implanted in the human body first require very good finish and very high precision, without any deviation, which requires the tool to meet high processing requirements from the design of the blade structure to the design of the blade coating.
4. CNC processing requirements:
Tolerances in the micron range are common in the medical industry, and choosing the right tool requires keen insight and rich experience. On the one hand, even drilling small holes requires the use of lubricants to reduce friction, reliably dissipate heat and handle fine iron chips at the blade edge; on the other hand, when producing cutting-edge medical devices (without burrs), sharp and smooth-running cutting tools are required to obtain high-quality surfaces.
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