Study on Processing Optimization in Ultrasonic-Assisted Grinding of SiCp/Al Thin-Walled Workpiece

2013 ◽  
Vol 313-314 ◽  
pp. 673-676 ◽  
Author(s):  
Ming Wang ◽  
Ming Zhou
Keyword(s):  
Removal Rate ◽  
High Strength ◽  
Optimization Method ◽  
Processing Parameters ◽  
Parameters Optimization ◽  
Ultrasonic Assisted ◽  
Thin Walled ◽  
Strength And Stiffness ◽  
Processing Optimization ◽  
Processing Parameters Optimization

Thin-walled workpieces have the characteristics to withstand a greater load with less material and they are used in aerospace field widely. SiCp/Al composite has high strength and stiffness, which meets the requirements of the aerospace workpieces well. The optimization method is studied with grinding stability and material removal rate as constraint conditions in this paper. The processing parameters optimization of a SiCp/Al thin-walled cylinder is analyzed according to stability lobe diagram. The grinding parameters optimization could be achieved by this method and the chatter could be prevented effectively.

Review on Hydrostatic Extrusion of Magnesium Alloys

2014 ◽  
Vol 788 ◽  
pp. 115-121
Author(s):  
Rong Wang ◽  
Xiu Rong Zhu ◽  
Zhi Wen Shao ◽  
Yong Dong Xu ◽  
Jun Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Strength ◽  
Processing Parameters ◽  
Extrusion Process ◽  
Parameters Optimization ◽  
Hydrostatic Extrusion ◽  
Mg Alloys ◽  
Microstructures And Mechanical Properties ◽  
Processing Parameters Optimization ◽  
Cast Parts

Magnesium wrought alloys are of special interest for structural components owing to their improved microstructures and mechanical properties by comparison with Mg cast parts. However, the market of Mg wrought alloys is still relatively small and one of the most important limitations for their application in areas such as aviation and spaceflight is that their strength is still not high enough to be widely used. Currently, more and more attention are paid to hydrostatic extrusion of Mg alloys because the extruded Mg alloys which exhibit extremely fine grains and high strength can be easily obtained by hydrostatic extrusion process. This review detailed the microstructures and mechanical properties of various wrought Mg alloys subjected to hydrostatic extrusion. Furthermore, numerical simulations and processing parameters optimization of the hydrostatic extrusion were also discussed. Finally, the current problems and development trends of hydrostatic extrusion of high-strength Mg alloys were also put forward.

scholarly journals Effects of Processing Parameters on the Surface Quality of Wrought Ni-based Superalloy by Ultrasonic Assisted Electrochemical Grinding

2021 ◽  
Author(s):  
Yucai Ma ◽  
Yingyue Yin ◽  
J H Zhang ◽  
Jinxing Huo
Keyword(s):  
Surface Quality ◽  
Current Density ◽  
Removal Rate ◽  
High Strength ◽  
Processing Parameters ◽  
Electrochemical Dissolution ◽  
Effective Removal ◽  
Ultrasonic Assisted ◽  
Electrochemical Grinding

Abstract Ni-based GH625 superalloy has been widely employed in the aerospace industry due to its high strength, outstanding corrosion resistance and high temperature resistance. A novel hybrid processing method of ultrasonic-assisted electrochemical grinding (UAECG) can achieve the high-effective removal rate for difficult-to-process materials and thereby avoids the stray corrosion during the process. This study systematically investigated the electrochemical dissolution behaviors of GH625 alloy at low current density and effects of processing parameters on its surface roughness. A qualitative model was proposed to further reveal its removal mechanism for GH625 alloy during UAECG process. Polarization curves depicted that an efficient and stable electrochemical dissolution was achieved at an appropriate temperature (20°C) and concentration (10 wt.%) of NaNO 3 electrolyte. The findings also revealed that selective corrosion preferentially occurred on the grain boundary or near the NbC carbides under different current density corrosion circumstance. Compared with ECG process, the excellent surface quality ( R a = 0.37 μm) and taper of the small holes (taper = 0.04 ±0.005°) are obtained at the optimized condition of pulse voltage of 5.8V, feed rate of 0.6mm /min, cathode speed of 12kr /min and ultrasonic drive amplitude of 60 % by UAECG technology.

Processing Parameters Optimization on Control of Residual Stresses and Distortion during High-Speed Milling of Thin-Walled Workpiece

2012 ◽  
Vol 531-532 ◽  
pp. 118-121
Author(s):  
Xiao Hui Jiang ◽  
Bei Zhi Li ◽  
Xiao Yan Zuo ◽  
Jian Guo Yang
Keyword(s):  
Residual Stresses ◽  
High Speed ◽  
Removal Rate ◽  
Cutting Speed ◽  
Processing Parameters ◽  
Calculation Model ◽  
Parameters Optimization ◽  
Machining Processes ◽  
High Speed Milling ◽  
Thin Walled

In the aerospace and auto industries, the residual tensile stresses will cause the structures broke and damaged. Hence, different methods were considered to optimize the machining processes. In this article, a residual stresses calculation model using AdvantEdge 2D turning was integrated with 2D milling physical model in order to analyze high-speed milling thin-walled workpiece. Through optimizing the processing parameters (improving the cutting speed and decreasing the cutting depth) during high-speed milling, not only we can get a high removal rate and receive a distribution of equably surface residual stresses, but also a slowing down trend of in-depth residual stress can be obtained. In addition, we evaluate this method using a typical part at the sensitive area, and the machining quality can be improved obviously.

Parameters Optimization and Experimental Analysis in High Speed Machining

2012 ◽  
Vol 591-593 ◽  
pp. 480-483
Author(s):  
Huan Lin ◽  
Dong Qiang Gao ◽  
Zhong Yan Li ◽  
Jiang Miao Yi
Keyword(s):  
Genetic Algorithm ◽  
High Speed ◽  
Production Efficiency ◽  
Cutting Parameters ◽  
Processing Parameters ◽  
Parameters Optimization ◽  
High Speed Machining ◽  
Before And After ◽  
Processing Parameters Optimization ◽  
Cutting Parameters Optimization

First of all, in the cutting parameters optimization, according to the different processing conditions, optimization variables selection is different, including production efficiency the objective function and the constraint conditions of the machine tool. And then using genetic algorithm to build a high-speed processing parameters optimization model. The mathematical model explores the best solution through the software Matlab, and gets the optimal combination between the parameters of each cutting; high speed machining cutting parameters provides the reference for the choice of the user. Through the optimization of the comparison of the before and after that, using genetic algorithm cutting parameters optimization, mach inability got obvious improvement, in order to ensure the quality of processing also achieve the maximization of the production efficiency.

Processing Parameters Optimization and Experiment Research of Automatic Polishing Technology for Free Surface of Dies

2012 ◽  
Vol 159 ◽  
pp. 198-202
Author(s):  
Dong Ming Li ◽  
Ying Jia ◽  
Xiao Jing Tian ◽  
Xian Ke Ren ◽  
Jun Wei Yin
Keyword(s):  
Free Surface ◽  
Processing Parameters ◽  
Parameters Optimization ◽  
Numerical Control ◽  
Analysis Method ◽  
Automatic Polishing ◽  
Practical Research ◽  
Orthogonal Analysis ◽  
Processing Parameters Optimization ◽  
Machine Processing

Abstract: A kind of automatic polishing equipment for free surface of dies is designed, which is fixed on the backbone of numerical control machine. Processing parameters optimization are gotten by the orthogonal analysis method based on experiment data and surface roughness is about 1.0μm, which provides good basis of practical research and application of accurate working for free surface of dies.

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