In the series production of tubes made from stainless, austenitic steel grade 1.4580, burr formation at drill holes presented a significant problem.
A customer involved in mass production was confronted with burr heights of up to 0.4 mm, and disruptive drilling caps were regularly observed. The methods used up to that point – including circular interpolation for deburring – failed to deliver satisfactory results and led to increased rework efforts.
In search of a more efficient and process-reliable solution, the customer turned to our team of experts. Through extensive testing, a significant improvement was achieved using the ExBurrDrill, made from solid carbide (VHM).
Even at the following cutting parameters, the tool delivered impressive results:
- Spindle speed (n): 3,000 rpm
- Feed per revolution (f): 0.15 mm/rev
- Feed rate (Vf): 450 mm/min
The Results
- No more drilling caps at hole exits
- Reduction of burr height to a maximum of 0.050 mm
By adjusting the cutting parameters to a spindle speed of 2,000 rpm and a feed of 0.08 mm/rev, burr height could be further reduced to just 0.025 mm – an outstanding result that significantly exceeded the customer's requirements.
CONCLUSION
The use of the ExBurrDrill not only enables a drastic reduction of burrs and drilling caps during the machining of austenitic stainless steel, but also significantly enhances production efficiency and process reliability. As a result, the need for time-consuming and costly post-processing is minimized.
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