CHIRON CNC Processing Guide

A CHIRON is a high-speed machining center built around a moving column and a swiveling spindle head. The worktable stays put while the tool moves in X, Y and Z. The head tilts and rotates to reach the part from almost any direction. That layout is why these machines hold tight position on deep pockets, thin walls and blended surfaces where a three-axis mill starts stacking setups.

Spindle speed is the other half of the story. HSK and similar toolholders let the machine run small cutters at high rpm with enough stiffness to avoid chatter. For aluminum and titanium airframe parts, that means finer stepovers and shorter cycle times. For hardened tool steel, it means a light depth of cut but a clean finish that needs less hand work later.

The trade-off is programming. Five simultaneous axes move the tool along a curve in space. A cutter path that looks fine in a three-axis simulation can gouge a wall when two rotary axes interpolate at the same time. Good CAM, a verified post-processor and a machinist who checks stock removal before the first cut are not optional here.

The clearest cases are parts with compound angles, contoured surfaces or undercut features. Think turbine blades, impellers, medical bone plates, actuator housings and deep-cavity mold inserts. If a part needs four or five setups on a three-axis machine to reach all its faces, one five-axis setup on a CHIRON usually wins on both tolerance stack-up and labor.

Prismatic parts with simple geometry and no undercuts do not need it. Brackets, plates and shafts with holes on two or three orthogonal faces are faster and cheaper on a three-axis or four-axis mill. Putting them on a five-axis center burns spindle hours you could spend on harder work.

Size matters too. A Ø400 mm rotary table sets a practical limit on what you can swing, and long slender parts need support or they will deflect. When a part runs past roughly 1,150 mm in one direction, we move it to a larger platform rather than fight the envelope.

• 1
  Good fitCompound angles, contoured blades, deep cavities, undercut features
• 2
  Marginal fitPrismatic parts with a few angled holes on one face
• 3
  Poor fitFlat plates, simple shafts, parts that fit a three-axis vise

Every job starts with a DFM read. We check wall thickness, tool reach, corner radii and where the part needs to be held. A wall under 1 mm on a titanium part forces a different strategy than the same wall in 6061. Our engineers flag those points in the quote so you can decide before metal is cut.

Fixture design comes next. Five-axis work often needs a single tombstone or a custom soft-jaw setup that exposes the part without blocking the tool. Getting this wrong is the most common cause of slow jobs. When the fixture is right, the machine runs near its feed limits and the operator is not standing there resetting clamps.

First-article inspection closes the loop. We measure the critical features, compare them to the model and adjust offsets before the run continues. That is how we hold a 99.99% qualification rate across a 127-machine shop rather than relying on luck at the end.

Aluminum is the bread and butter of high-speed five-axis work. Grades 6061, 7075 and 6082 cut fast and hold good finish. Stainless 316L and 17-4PH need lower feeds and more coolant, but the CHIRON handles them without the chatter you get on a lighter mill. Titanium TC4 (Ti-6Al-4V) and Inconel are slower again. We cut them, but cycle times reflect the material, not the machine.

Plastics are a different discipline. POM, PEEK and carbon fiber need sharp cutters, high rake, and dust control. The same spindle that runs a titanium blade can run a PEEK medical component, but the feeds, speeds and vacuum setup are different animals. We keep them on separate schedules to avoid cross-contamination.

After machining, parts move to finishing. Anodizing in clear, color or hardcoat is standard for aluminum. Electroless nickel, zinc and black oxide cover steel and stainless. Bead blasting and tumbling knock down tool marks on non-critical faces. Laser marking is available down to 1.5 mm character height for part IDs and traceability codes.