Milling NiTi Alloys: Effects of Tool Helix Angle on Cutting Forces and Surface Quality
Author Information
Author(s): Kowalczyk Małgorzata, Tomczyk Krzysztof
Primary Institution: Cracow University of Technology
Hypothesis
How does the helix angle of milling tools affect the cutting forces and surface roughness when machining NiTi alloys?
Conclusion
The study found that using a coated tool with a helix angle of 30° significantly reduced cutting forces and improved surface quality.
Supporting Evidence
- The lowest surface roughness was achieved with a coated tool at a helix angle of 30°.
- The lowest cutting force was observed with a coated tool at a cutting speed of 55 m/min and a helix angle of 40°.
- Using the Taguchi method allowed for efficient optimization of machining parameters.
- Coated tools significantly reduce friction and wear during machining.
- An increase in feed per tooth leads to higher cutting forces.
- Higher cutting speeds improve surface quality due to reduced interaction time.
- Larger helix angles distribute cutting loads more evenly, reducing forces.
- Surface roughness is influenced by both cutting speed and feed rate.
Takeaway
This study shows that changing the angle of the tool used for cutting can make it easier to cut special metals, helping to make smoother surfaces.
Methodology
Experiments were conducted using a CNC machine with different helix angles, cutting speeds, and feed rates, following a Taguchi design.
Potential Biases
Potential bias in tool selection and experimental conditions may affect the generalizability of the results.
Limitations
The study focused only on specific helix angles and did not explore other potential machining parameters.
Statistical Information
P-Value
0.019
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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