Research on the mechanism of particle deposit effects and process optimization of nanosecond pulsed laser truing and dressing of materials.
Research on the mechanism of particle deposit effects and process optimization of nanosecond pulsed laser truing and dressing of materials.
复制标题
研究了纳秒脉冲激光磨削加工材料的颗粒沉积效应机理及工艺优化。
作者：
建立了柱坐标下新的等离子体膨胀模型和等离子体激发变化率模型。使用膨胀模型对青铜金刚石砂轮（LTDBDGW）的纳秒脉冲激光修整和修整的等离子体膨胀特性进行了数值分析。结果表明，X 方向和 R 方向的等离子体膨胀分别约为 8 × 10−4 m 和 2.5 × 10−4 m。结果计算出等离子体电子密度为1.0757×1016 cm−3。等离子体激发变化率模型的计算表明，LTBDBDGW的等离子体激发机制主要受热激发效应控制。在高温和高速碰撞的作用下，黑色颗粒沉积在青铜金刚石砂轮的表面上，影响表面形貌并降低磨粒从结合剂中突出的高度。等离子体实验通过 LTDBDGW 进行。当激光垂直入射、激光功率密度为3.359 × 108 W cm−2时，采用Boltzmann绘图法和Stark展宽法得到等离子体电子温度和等离子体电子密度，分别约为9700 K和1.6128 × 1016 ~ 2.0636 × 1016 cm−2。 LTDBDGW 实验在有辅助吹气和无辅助吹气的情况下进行。通过辅助吹气证实了砂轮表面质量的改善。 LTDBDGW 的等离子体实验是用 LTDBDGW 进行的。高速摄像机捕捉到等离子体膨胀的演变过程。
New plasma expansion models and change rate models of plasma excitation were established under cylindrical coordinates. Expansion models were used to numerically analyse the plasma expansion characteristics of the nanosecond pulsed laser truing and dressing of a bronze–diamond grinding wheel (LTDBDGW). The results showed that the plasma expansions in the X- and R-directions were approximately 8 × 10−4 m and 2.5 × 10−4 m, respectively. The plasma electron density calculated by the results was 1.0757 × 1016 cm−3. The calculation of the change rate models of the plasma excitation shows that the plasma excitation mechanism of LTDBDGW was controlled mainly by the thermal excitation effect. In response to high-temperature and high-speed collisions, black particles deposit onto the surface of the bronze–diamond grinding wheel, affecting the topography of the surface and reducing the height of the abrasive grains protruding from the binding agent. Plasma experiments were carried out via LTDBDGW. When the laser was vertically incident, and the laser power density was 3.359 × 108 W cm−2, the Boltzmann plot method and the Stark broadening method were used to get the plasma electron temperature and the plasma electron density, which were approximately 9700 K and 1.6128 × 1016 to 2.0636 × 1016 cm−2, respectively. LTDBDGW experiments were conducted with and without assisted blowing. Surface quality improvement of the grinding wheel was confirmed with auxiliary blowing. Plasma experiments for LTDBDGW were carried out with LTDBDGW. A high-speed camera captured the evolution of plasma expansion.
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影响因子：
4.5
作者：
Guha, Abhijit;Samanta, Subho
通讯作者：
Samanta, Subho
影响因子：
7.2
作者：
Pinhao, N.;Moura, A.;Neves, J.
通讯作者：
Neves, J.
研究纳秒脉冲激光沉积过程中等离子体羽流膨胀特性的新模型
影响因子：
3.4
作者：
Tan, Xinyu;Zhang, Duanming;Fang, Ranran
通讯作者：
Fang, Ranran
DOI：
10.1016/s0584-8547(02)00057-5
发表时间：
2002-07-31
影响因子：
3.3
作者：
Abdellatif, G;Imam, H
通讯作者：
Imam, H
影响因子：
3.3
作者：
Dojic, Dejan;Skocic, Milos;Djenize, Stevan
通讯作者：
Djenize, Stevan