A laser-induced oxidation-assisted micro-turning device and method thereof
A laser induction and oxidation device technology, applied in turning equipment, turning equipment, metal processing equipment, etc., to achieve the effect of ensuring consistency, improving processing efficiency, and improving processing accuracy
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Embodiment 1
[0046] Below to The YG20 cemented carbide round bar is used as the workpiece material, and the PCD micro-turning tool is used as the cutting tool, and the laser-induced oxidation-assisted micro-turning device and method thereof proposed by the present invention are further described.
[0047] YG20 cemented carbide is mainly composed of hard phase WC (80%) and binder phase Co (20%), with a density of 13.4-13.8g / cm 3 , the hardness is 85-87HRA, the bending strength is 3100MPa, it has good strength, hardness and wear resistance, so it is widely used in various stamping dies and tools. Through the high-temperature oxidation experiment research on YG20 cemented carbide materials, it is found that when YG20 cemented carbide is heated at a temperature above 500 ° C, it will undergo oxidation reaction with oxygen in the air, and the rate of oxidation reaction will be parabolic as the temperature increases. The law gradually increases, and the oxidation reaction equation is as follow...
Embodiment 2
[0058] The difference from Embodiment 1 is that this embodiment adopts TiB 2 The base ceramic round rod is used as the workpiece material. During the processing, the laser power is 5W, the pulse frequency is 20Khz, the scanning speed is 30mm / s-50mm / s, and the oxygen flow rate is 10L / min. The thickness of the obtained oxide layer is about 1.9μm-2.4μm, and the thickness of the heat-affected layer is about 2.6μm. -4.3 μm. During laser-induced oxidation-assisted micro-turning, the distance between the tip of the micro-turning tool and the laser spot along the workpiece axis is 15 mm, the spindle speed is 300 rad / min, the feed rate is 0.15 mm / s, the depth of cut is 3.0 μm, and the heat-affected layer is finally cut The spindle speed is 240rad / min, the feed speed is 0.01mm / s, and the cutting depth is 1.0μm.
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