A sustainable alternative for cooling the machining processes using a refrigerant fluid in recirculation inside the toolholder
A sustainable alternative for cooling the machining processes using a refrigerant fluid in recirculation inside the toolholder
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DOI：
10.1007/s10098-011-0359-z
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发表时间：
2011-03
影响因子：
4.3
通讯作者：
G. C. Vicentin;L. Sanchez;V. L. Scalon;G. G. C. Abreu-G.
中科院分区：
文献类型：
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作者：
G. C. Vicentin;L. Sanchez;V. L. Scalon;G. G. C. Abreu-G.
本文介绍了一种基于刀柄的车削刀具冷却系统，冷却液在其体内流动，这是因为这种冷却液必须能够因加工过程中产生的热量而相变。这样，一旦蒸发的潜热有利于排出热量，流体就在刀具下方蒸发，从而比使用没有相变的流体时的换热效率更高。随后，蒸发的冷却液通过位于刀架外的冷凝器，在那里被冷凝，并再次返回刀架，开始新的循环。本研究选用R-123氢氯氟碳液对难加工的Cr-Ni-Nb-Mn-N奥氏体钢进行了车削加工。在三种不同的加工条件下进行了加工试验：干式加工、外加切削液(常规方法)和所提出的刀具夹具。因此，开发的系统允许表面粗糙度比干法加工高达10%，刀具寿命接近传统方法，但比干法加工高32%；此外，如果冷却液保持在回路中，还具有环境和经济优势。
This article presents a cooling system for cutting tool in turning based in a toolholder with cooling fluid flowing inside its body being that this fluid must necessarily be able to phase change due to heat generated from machining processes. In this way, the fluid evaporates just under the cutting tool allowing a heat transfer more efficient than if were used a fluid without phase change once the latent heat of evaporation is beneficial for removal heat. Following, the cooling fluid evaporated passes through a condenser located out of the toolholder where it is condensated and returns to the toolholder again and a new cycle is started. In this study, the R-123, a hydrochlorofluorocarbon (HCFC) fluid, was selected for the turning of a Cr–Ni–Nb–Mn–N austenitic steel of hard machinability. The machining tests were carried out under three different machining conditions: dry machining, external cutting fluid (conventional method), and with the toolholder proposed. As result, the developed system allows a surface roughness up to 10% better than dry machining and a tool life close to the conventional method, but 32% superior to dry machining; moreover, there are environmental and economics advantages once the cooling fluid is maintained in a loop circuit.