2013年11月29日星期五

Milling Prone to Problems and Possible Solutions - Milling Excessive Vibration

1. Clamping poor

Possible solutions.
Assess the cutting force and support direction or improve clamping.
Milling cutting force is reduced by reducing the milling depth of cut.
Sparse teeth and different tooth pitch milling cutter to obtain a more positive cutting action.
L trough with small nose radius and parallel surfaces.
Select fine grain coating or thin coating blades 

2. Workpiece is not firmly

Consider the square shoulder milling cutter trough has a positive rake angle (90 degree entering angle).
L trough blades
Lower axial cutting force - the use of low depth of cut, small nose radius and parallel surfaces.
Select sparsely toothed milling cutter has a different pitch.

3. Use a large overhang tool

Overhang as small as possible.
Use sparse teeth milling cutter having a different tooth pitch.
Balanced radial and axial cutting forces - the main angle of 45 degrees, a large nose radius or circular blade cemented carbide tool.
Increase the amount of feed per tooth
The use of light cutting insert geometry-L / M

4.Unstable spindle milling side shoulder

Select cemented carbide tool diameter as small as possible
Positive rake angle cemented carbide tool and blades
Try to conventional milling
Check spindle deviation to determine whether the machine can withstand

5 table feed irregular

Try to conventional milling
Tighten the machine feed device. 

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