One-Clamping CNC Turning-Milling: A New Tolerance Control Solution for Complex Parts

In modern precision manufacturing, the machining accuracy of complex shaft parts directly determines overall equipment performance. Traditional turning and milling processes typically require multiple setups to complete all operations, which not only increases accumulated error risks but also extends production cycles. CNC turning-milling technology offers a systematic solution to these challenges.

Typical shaft components often feature outer diameters, end faces, grooves, and holes. Conventional processing requires turning on lathes first, then transferring to machining centers for milling and drilling. Each re-setup introduces positioning errors, and for parts requiring IT7 grade or higher precision, this error accumulation often leads to decreased yield rates.

Turning-milling centers integrate turning and milling spindles in a single machine, allowing workpieces to complete all operations with just one clamping. Taking a typical hydraulic valve spool as an example, outer diameter turning, end face groove milling, and radial hole drilling can be performed continuously on the same equipment. This approach can control geometric tolerances within 0.01mm, with surface roughness below Ra0.8μm.

Achieving high-precision machining requires appropriate process parameter settings. For precision parts made of stainless steel, cutting speeds are typically controlled at 80-120m/min, with feed rates maintained at 0.1-0.15mm/r.

As industries such as medical devices and aerospace continue to raise precision requirements for components, the application scope of turning-milling machining is expanding. Particularly in multi-variety, small-batch production scenarios, this technology can significantly shorten delivery cycles and improve machining consistency.