Chatter marks in CNC machining are often caused by a variety of factors. Here are some possible solutions:
- Reduce the weight of the part causing vibration, minimizing inertia.
- Fix or clamp the areas where vibration is greatest, such as with a steady rest or workholder.
CNC Machining
- Increase the rigidity of the machining system, such as using a toolholder with a higher spring rate or a special vibration damper with a dynamic damper to absorb impact energy.
- Address the blade and workpiece rotation direction, such as by changing the tool shape and lead angle to reduce cutting resistance.
- Check whether the machine speed fluctuates significantly. If so, try switching from rotary feed to fractional feed.
- Consider the workpiece itself or the workpiece’s rigidity. Per esempio, some smaller, thinner parts may lack rigidity or their shape may prevent adequate clamping using a suitable press-fit fixture.
- Check the tool for issues, such as excessive tip radius or excessively wide blades. You can simply sharpen the tool by hand to reduce vibration.
- The selection of cutting parameters is also crucial, including cutting speed, feed, feed amount, and cooling method.
In sintesi
Solving the chatter mark problem requires comprehensive consideration of multiple factors such as machine tools, cutting tools, workpieces, cutting parameters, ecc. By adjusting and optimizing these factors, vibration and chatter marks can be effectively reduced, and processing quality and efficiency can be improved.
