Study on Surface Quality of Al/SiCp Composites with Ultrasonic Vibration High Speed Milling

2010 ◽  
Vol 42 ◽  
pp. 363-366 ◽  
Author(s):  
Dao Hui Xiang ◽  
Xin Tao Zhi ◽  
Guang Xi Yue ◽  
Guo Fu Gao ◽  
Bo Zhao
Keyword(s):  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Formation Mechanism ◽  
High Speed ◽  
High Hardness ◽  
Machined Surface ◽  
Sic Particles ◽  
High Efficient ◽  
Ultrasonic Milling ◽  
Vibration Milling

Al/SiCp composites with excellent physical and mechanical properties are applied widely in the aerospace, automotive, national defense, electronics and other fields. High content and high hardness SiC particles lead to poor machinability and that further application is restricted. Surface microstructure and surface formation mechanism of Al/SiCp composites were studied under condition of ultrasonic vibration milling and conventional milling. The experimental results show that machined surface had the same defects, but SiC particles were mainly direct sheared in ultrasonic milling different from the conventional milling, the roughness (Ra) of the surface generated in the ultrasonic vibration milling was smaller. At last, the formation mechanism of surface topography in the ultrasonic milling was analyzed. The research indicated that ultrasonic milling could obtain better surface quality than conventional milling and with high efficient.

Study on Surface Quality of BK7 Optical Glass by Longitudinal Torsional Composite Ultrasonic Vibration Milling

2020 ◽  
Vol 984 ◽  
pp. 51-57
Author(s):  
Ya Jian Ma ◽  
Wen Zhong Nie ◽  
Jian Min Lu ◽  
Huan Chen
Keyword(s):  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Optical Glass ◽  
Spindle Speed ◽  
High Tech ◽  
Processing Efficiency ◽  
Machined Surface ◽  
Ultrasonic Milling ◽  
Vibration Milling

BK7 optical glass has been widely used in modern high-tech fields such as aerospace, automotive, optical precision instruments, electronic information, etc. due to its excellent performance, but its gap between plasticity and hardness is huge, making traditional machining easy to appear sub-surface. Damage and other phenomena, surface quality is difficult to meet the requirements. In this paper, the ultrasonic milling dynamics model was firstly established, and then the multi-factor method was used to detect the longitudinal torsional composite ultrasonic milling and ordinary milling of BK7 optical glass, and the surface roughness and surface topography of different spindle speed, milling speed and milling depth were analyzed. Finally, the laws and mechanisms affecting the quality of the machined surface were obtained. It is found that the surface quality is best when the spindle speed is 3000r/min and the milling depth is 0.2mm; the surface quality of BK7 optical glass decreases with the increase of milling speed. The surface quality and processing efficiency of BK7 optical glass are improved by longitudinal torsional composite ultrasonic vibration milling, and the optimal process parameters for BK7 optical glass longitudinal torsional ultrasonic milling are provided.

The Effect of One Directional Ultrasonic Vibration Assistance in High Speed Meso-Scale Milling Process

2010 ◽  
Vol 447-448 ◽  
pp. 41-45 ◽  
Author(s):  
Jeong Hoon Ko ◽  
Kah Chuan Shaw ◽  
Han Kwang Chua ◽  
Rong Ming Lin
Keyword(s):  
Surface Quality ◽  
Ultrasonic Vibration ◽  
High Speed ◽  
Cutting Speed ◽  
Milling Process ◽  
Air Bearing ◽  
Machined Surface ◽  
Machined Surface Quality ◽  
Milled Surface ◽  
Vibration Assistance

One-directional ultrasonic vibration assisted milling system is designed and its performance is investigated in terms of machined surface quality under 135,000 rpm. The ultrasonic vibration generator excites the workpiece with a frequency around 40 kHz and amplitude of a few micro meters. The milling tool’s cutting speed is controlled by an air-bearing spindle system. Both feed-directional and cross-feed directional ultrasonic vibration assistance are considered in order to understand the mechanism of ultrasonic vibration assistance for surface roughness generation. A comparison is done on a milled surface which is generated with and without ultrasonic vibration assistance. The experimental results show that ultrasonic vibration assistance can improve the machined surface quality which depended on the cutting edge radius and the feed per tooth.

Research on High-Speed Cutting of Cr12MoV Hardened Steel - A Review

2020 ◽  
Vol 15 ◽  
Author(s):  
Fei Sun ◽  
Guohe Li ◽  
Qi Zhang ◽  
Meng Liu
Keyword(s):  
High Speed ◽  
Cutting Temperature ◽  
High Hardness ◽  
High Strength ◽  
Hardened Steel ◽  
Parameters Optimization ◽  
Future Research ◽  
High Speed Machining ◽  
Machined Surface ◽  
Stamping Die

: Cr12MoV hardened steel is widely used in the manufacturing of stamping die because of its high strength, high hardness, and good wear resistance. As a kind of mainstream cutting technology, high-speed machining has been applied in the machining of Cr12MoV hardened steel. Based on the review of a large number of literature, the development of high-speed machining of Cr12MoV hardened steel was summarized, including the research status of the saw-tooth chip, cutting force, cutting temperature, tool wear, machined surface quality, and parameters optimization. The problems that exist in the current research were discussed and the directions of future research were pointed out. It can promote the development of high-speed machining of Cr12MoV hardened steel.

Preliminary Experimental Study on Effect of Cutting Fluid on Milled Surface Quality of Iron-Base Superalloy

2014 ◽  
Vol 1077 ◽  
pp. 61-65
Author(s):  
Pei Yan ◽  
Xiang Su ◽  
Gang Wang ◽  
Yi Ming Rong
Keyword(s):  
Experimental Study ◽  
Surface Quality ◽  
High Speed ◽  
Cutting Fluid ◽  
Cutting Fluids ◽  
Machined Surface ◽  
Iron Base ◽  
Milled Surface ◽  
Base Superalloy

As the development of new materials and high speed machining, cutting fluid becomes more and more important because of its functions of cooling, lubrication, corrosion protection and cleaning. The main purposes of cutting fluid are decreasing temperature, reducing friction, extending tool life and improving machining efficiency. In precision machining, high machined surface integrity is the most important. In this paper, a preliminary experimental study on effect of two different cutting fluids on milled surface quality of iron-base superalloy was taken. The surface morphology, roughness, micro hardness and residual stress of the machined surface were investigated. The results showed that the material properties and geometric characteristics of the machined surface were significantly affected by cutting fluid conditions. The effect of cutting fluid on machined surface quality and service performance will become an important research direction. This paper also suggests the main contents of the further research on effect of cutting fluids on machined surface.

Research on Surface Roughness and Micro-Topography of Nano-ZrO2 Plate in Two-Dimension Ultrasonic Grinding

2008 ◽  
Vol 53-54 ◽  
pp. 243-247 ◽  
Author(s):  
Bo Zhao ◽  
Ming Li Zhao ◽  
Guo Fu Gao
Keyword(s):  
Surface Roughness ◽  
Ultrasonic Vibration ◽  
Ceramic Materials ◽  
Ceramic Plate ◽  
Two Dimensional ◽  
Machined Surface ◽  
Ultrasonic Grinding ◽  
High Efficient ◽  
Micro Topography ◽  
Processing Difficulty

The influence of ultrasonic vibration on the surface roughness and micro-topography of ceramics plate is discussed in this paper. Grinding assisted by two-dimensional ultrasonic vibration is developed to deal with the processing difficulty of ceramic materials due to its hard-brittle property. The experimental results show that the surface roughness value obtained in two-dimensional ultrasonic grinding nano-ZrO2 ceramic plate specimen is obviously smaller than that in common grinding, and the scratched grooves on the machined surface in ultrasonic grinding is wider and relatively smoother than that in common grinding. Consequently, it proves that the two-dimensional ultrasonic machining is a feasible, high-efficient machining method for hard-brittle materials.

Experimental Study on Wear-Resistance of Machined Surface in High Speed Milling Aviation Aluminum Alloy

2012 ◽  
Vol 500 ◽  
pp. 117-122
Author(s):  
Xiu Li Fu ◽  
Xiao Qin Wang ◽  
Yong Zhi Pan ◽  
Yang Qiao
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloy ◽  
Friction Coefficient ◽  
Surface Quality ◽  
Feed Rate ◽  
High Speed ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Machined Surface ◽  
Resistance Performance

The wear-resistance performance of machined surface is an important factor in the evaluation of surface quality and precision in aerospace manufacturing industry. By using high-speed Ring-Block friction and wear machine (MRH-3), the influence of cutting parameters in milling aluminum alloy 7050-T7451 on wear-resistance of machined surface including friction coefficient and wear quantity are experimentally investigated. The wear-resistance is particularly sensitive to cutting speed and feed rate. The friction coefficient has marked drop trends as cutting speed increases. The influence of cutting speed on wear quantity is more complicated and the tendency of wear quantity was ascend in first and descend at last (v>900/min). The results show that the influence of cutting parameters on wear-resistance was also positively correlated with surface roughness and work-hardening of machined surface. The high work-hardening and surface quality had the promoting effecting on wear-resistance. The experiment and analysis results show that the machined surface by high speed cutting and lower feed rate has more superior in surface quality and wear-resistance performance comparing with conventional cutting speed.

An Experimental Study on Diamond Cutting of Optical Glass

2008 ◽  
Vol 375-376 ◽  
pp. 211-215 ◽  
Author(s):  
Hang Zhao ◽  
Ming Zhou
Keyword(s):  
Experimental Study ◽  
Tool Wear ◽  
Ultrasonic Vibration ◽  
Optical Glass ◽  
High Hardness ◽  
Optical Quality ◽  
Process Conditions ◽  
Machined Surface ◽  
Ductile Mode ◽  
Indentation Analysis

Optical glass is one of the most difficult-to-cut brittle materials due to its high brittleness and high hardness. In this work, an experimental study was conducted to diamond-cut glass SF6 in ductile mode. Nano-indentation analysis was performed for understanding the material deformation behavior in practical cutting process. The effect of process conditions, i.e. conventional turning and ultrasonic vibration assisted cutting, on the tool wear and surface quality was discussed based on the observations of the tool wear zone microstructure and the machined surface topography. The investigation presents the feasibility of achieving optical quality surfaces on glass with the application of ultrasonic vibration cutting technology. The tool life and surface finish were improved significantly by applying ultrasonic vibration to the cutting tool.

Surface Topography and Roughness Simulations for 5-Axis Ball-End Milling

2009 ◽  
Vol 69-70 ◽  
pp. 471-475 ◽  
Author(s):  
Shi Guo Han ◽  
Jun Zhao ◽  
Xiao Feng Zhang
Keyword(s):  
Surface Topography ◽  
Surface Quality ◽  
High Speed ◽  
End Milling ◽  
Analytical Form ◽  
Influential Factors ◽  
Sculptured Surfaces ◽  
Machined Surface ◽  
Ball End Milling ◽  
Five Axis

In five-axis high speed milling of freeform surface with ball-end cutters, unwanted machining results are usually introduced by some error effects. Hence precise modeling and simulation of milled sculptured surfaces topography and roughness is the key to obtain optimal process parameters, satisfactory surface quality and high machining efficiency. In this paper, a predictive model for sculptured surface topography and roughness of ball-end milling is developed. Firstly, a mathematical model including both the relative motion of the cutter-workpiece couple and some influential factors on machined surface quality such as the tool runout, tool deflection and tool wear is proposed, and subsequently the analytical form of the tool swept envelope is derived by means of homogeneous coordinate transformation. Then the minimal z-values of the corresponding points lied in discrete cutting edges model and Z-map workpiece model are used to update the workpiece surface topography and to calculate 3D surface roughness. Finally, the simulation algorithm is realized with Matlab software. A series of machining tests on 3Cr2MoNi steel are conducted to validate the model, and the machined surface topography is found in good accordance with the simulation result.

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