Abstract
Cutter edge temperature in milling is an important factor to cutter life. With high cutting speed and feedrate, the cutting efficiency is high; however, the cutter edge temperature is high, shortening the cutter life. Therefore, it is necessary to know the cutter edge temperature in milling. Unfortunately, the cutter edge temperature is difficult to measure and predict in milling. To address the technical challenge, an analytical approach was proposed to predict cutter edge temperature in milling. First, the heat flux into the cutter edge was calculated. Second, by using the Green function, the cutter edge temperature was figured out, and the results obtained from this approach agreed well with that of a recognized test. Then, based on the engagement between the cutter and workpiece in trochoidal milling, the cutter edge temperature was obtained in trochoidal milling. Finally, a temperature comparison was made between trochoidal and side milling based on this analytical approach, and the reasons that trochoidal machining could extend the cutter life were found. This approach is first proposed to calculate the cutter edge temperature in trochoidal milling and can be applied to machining parameters optimization in trochoidal milling and cutter design optimization.
Highlights
Cutter edge temperature in milling is an important factor to cutter life
It has proposed a model of the cutter edge temperature using the Green function, and this approach is verified by comparing its result with that of a recognized test
Based on the engagement analysis in trochoidal machining, the cutter edge temperature history is calculated for the first time as far as we know
Summary
Cutter edge temperature in milling is an important factor to cutter life. With high cutting speed and feedrate, the cutting efficiency is high; the cutter edge temperature is high, shortening the cutter life. Deng et al [4] presented an effective approach to optimize trochoidal toolpath based on cutting forces and machine tool kinematics They pointed out that the engagement angle could be π in traditional cavity milling, which will inevitably lead to large cutter load and high cutting temperature. Li et al [5] constructed a novel trochoidal toolpath pattern for effective slotting; the cutting efficiency was enhanced, and immersion angles were limited by the given threshold They confirmed that trochoidal milling strategy could reduce the cutter load and improve the heat dissipation, which is beneficial to extend the cutter life. Previous researches on the cutting force, trochoidal toolpath, and stability of trochoidal machining are of great importance They have demonstrated that trochoidal milling is able to extend cutter life, improve cutting efficiency, control cutting force, machine difficult-to-cut materials effectively.
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