Cutting temperature and heat generated at the tool-chip interface during high speed machining operations have been recognized as major factors that influence tool performance and workpiece geometry or properties. This paper presents an experimental setup able to determine the temperature field in the cutting zone, during an orthogonal machining operation with 42 CrMo 4 steel. The machining was performed with a gas gun, using standard carbide tools TiCN coated and for cutting speeds up to 50 ms{sup}(-1). The technique of temperature measurement was developed on the principle of pyrometry in the visible spectral range by using an intensified CCD camera with very short exposure time and interference filter at 0.8 μm. Temperature gradients were obtained in an area close to the cutting edge of the tool, along the secondary shear zone. Effects of the cutting speed and the chip thickness on the temperature profile in the chip were determined. Maximum chip temperature of about 825℃ was found, for cutting speed close to 20 ms{sup}(-1), located at a distance of 300 μm of the tool tip. It was established that this experimental arrangement is quite efficient and can provide fundamental data on the temperature field in materials during orthogonal high speed machining.
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机译：高速加工过程中在刀具-切屑界面处产生的切削温度和热量已被认为是影响刀具性能和工件几何形状或特性的主要因素。本文介绍了一种实验装置，该装置可以在使用42 CrMo 4钢进行正交加工的过程中确定切削区域的温度场。用气枪进行机加工，使用标准的硬质合金刀具TiCN涂层，切削速度高达50 ms {sup}（-1）。温度测量技术是根据高温光谱原理在可见光谱范围内开发的，它使用了曝光时间非常短的增强型CCD相机和0.8μm的干涉滤光片。沿二次剪切区在靠近刀具切削刃的区域获得温度梯度。确定切削速度和切屑厚度对切屑中温度曲线的影响。发现最大切屑温度约为825℃，切削速度接近20 ms {sup}（-1），位于刀尖的300μm处。可以确定的是，这种实验装置非常有效，并且可以在正交高速加工过程中提供有关材料温度场的基本数据。
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