Modeling of Force on Axial Power Ultrasonic Honing

2013 ◽  
Vol 690-693 ◽  
pp. 2470-2474
Author(s):  
Zhen Liu ◽  
Xi Jing Zhu ◽  
Jin Qing Wang ◽  
Yun Peng Shao
Keyword(s):  
Surface Quality ◽  
Material Removal ◽  
Cylinder Liner ◽  
Processing Parameters ◽  
Force Model ◽  
Physical Change ◽  
Hard Materials ◽  
Good Surface ◽  
Engine Cylinder ◽  
Power Ultrasonic

Ultrasonic vibration machining is a kind of effective method for precision processing of brittle-hard materials, especially it can obtain good surface quality in engine cylinder liner precision processing with the power ultrasonic honing. Based on the material removal mechanism of ultrasonic honing, a new ultrasonic honing force model was established, which included material chip deformation and friction situation between grains and workpiece. Therefore the effect to honing force can be known clearly with processing parameters and material physical change, which provided theory foundation to further study in ultrasonic mechanism and real time surface quality protection in honing process.

Comparison of Processing Features between Semi Bonded Abrasive Lapping and Loose Abrasive Lapping

2009 ◽  
Vol 416 ◽  
pp. 439-442
Author(s):  
Xun Lv ◽  
Ju Long Yuan ◽  
Dong Hui Wen
Keyword(s):  
Surface Roughness ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Processing Parameters ◽  
Good Surface ◽  
Ultra Precision ◽  
New Processing ◽  
Short Time

Semi bonded abrasive lapping is an effective ultra-precision lapping method. It can obtain good surface quality of workpiece in short time. This paper focused on the differences of processing features by comparing semi bonded abrasive lapping and loose abrasive lapping in several groups processing parameters. The results showed that the surface roughness of workpiece in semi bonded abrasive lapping was far superior to that of loose abrasive lapping in same processing parameters. And the MRR (material removal rate) of semi bonded abrasive lapping was slightly lower than that of loose abrasive lapping. For these features of semi bonded abrasive, a new processing flow would also be proposed in this paper.

Study on Semi-Fixed Abrasive Lapping of Ultra-Thin Silver Electrode Layer

2009 ◽  
Vol 69-70 ◽  
pp. 225-228
Author(s):  
Xun Lv ◽  
Ju Long Yuan
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
High Efficiency ◽  
Processing Parameters ◽  
Silver Electrode ◽  
Processing Load ◽  
Electrode Layer ◽  
Good Surface ◽  
Good Surface Quality ◽  
Ultra Precision

Silver electrode layer of piezoelectric ceramic transducer requires good surface quality and high efficiency. Efficiency of traditional lapping and polishing is very low. Ultra-precision grinding technology is also unsuitable for the thickness of workpiece is extremely thin. Semi bonded abrasive lapping is a new ultra-precision processing method. The new ultra-precise method can achieve good surface quality in short time, and removal stock of workpiece is small. In order to research the optimal technology of semi bonded abrasive lapping about silver electrode layer, this paper research several major processing parameters by experiments. The results show that appropriate processing load can obtain better surface roughness of silver electrode layer，and surface roughness of silver electrode layer has little change with different processing speed. By using ultra-fine semi bonded abrasive plate, 94.08KPa processing load and 40 rpm polishing speed, after 30 minutes, surface roughness of silver electrode layer is 11nm, and removal stock is 11.5μm.

scholarly journals Multiobjective Optimization of Turning Cutting Parameters for J-Steel Material

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Adel T. Abbas ◽  
Karim Hamza ◽  
Mohamed F. Aly ◽  
Essam A. Al-Bahkali
Keyword(s):  
Multiobjective Optimization ◽  
Surface Quality ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Cutting Parameters ◽  
Trade Off ◽  
Good Surface ◽  
Good Surface Quality ◽  
Steel Material

This paper presents a multiobjective optimization study of cutting parameters in turning operation for a heat-treated alloy steel material (J-Steel) with Vickers hardness in the range of HV 365–395 using uncoated, unlubricated Tungsten-Carbide tools. The primary aim is to identify proper settings of the cutting parameters (cutting speed, feed rate, and depth of cut) that lead to reasonable compromises between good surface quality and high material removal rate. Thorough exploration of the range of cutting parameters was conducted via a five-level full-factorial experimental matrix of samples and the Pareto trade-off frontier is identified. The trade-off among the objectives was observed to have a “knee” shape, in which certain settings for the cutting parameters can achieve both good surface quality and high material removal rate within certain limits. However, improving one of the objectives beyond these limits can only happen at the expense of a large compromise in the other objective. An alternative approach for identifying the trade-off frontier was also tested via multiobjective implementation of the Efficient Global Optimization (m-EGO) algorithm. The m-EGO algorithm was successful in identifying two points within the good range of the trade-off frontier with 36% fewer experimental samples.

scholarly journals Micromachining in Powder-Mixed Micro Electrical Discharge Machining

2020 ◽  
Vol 10 (11) ◽  
pp. 3795 ◽  
Author(s):  
Gunawan Setia Prihandana ◽  
Muslim Mahardika ◽  
Tutik Sriani
Keyword(s):  
Surface Quality ◽  
Material Removal Rate ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Machining Process ◽  
Dielectric Fluid ◽  
Good Surface ◽  
Micro Electrical Discharge Machining ◽  
Powder Characteristics

Micromachining in the micro-electric discharge machining (μ-EDM) process requires high material-removal rate with good surface quality. Power-mixed μ-EDM, a modified machining process by introducing specific powder into the dielectric fluid, is among the key inventions to achieving these requirements. This article presents a review of the implementation of powder-mixed micro-EDM processes for microfabrication. Special attention was given to the influence of the powder characteristics, such as the concentration, electrical conductivity, shape and size of the powder. Subsequently, when describing the use of powder for obtaining a high material-removal rate and surface quality, other major applications in μ-EDM for surface modification and geometrical accuracy were also discussed. Finally, some of the varied methods that are used in powder-mixed μ-EDM and industrialization challenges are extensively elaborated.

The Experiment Research of Precision Grinding of Li-Ti Ferrite with Graphite Grinding Wheel

2010 ◽  
Vol 431-432 ◽  
pp. 322-325
Author(s):  
Bei Zhang ◽  
Hong Hua Su ◽  
Hong Jun Xu ◽  
Yu Can Fu
Keyword(s):  
Surface Quality ◽  
Material Removal ◽  
Removal Rate ◽  
High Surface ◽  
Ground Surface ◽  
Grinding Wheel ◽  
Precision Grinding ◽  
High Surface Quality ◽  
Good Surface ◽  
Good Surface Quality

Li-Ti ferrite used in aviation occasions needs good surface quality. In conventional grinding it is difficult to meet the surface demand. Accordingly, this paper proposed a new grinding process to change the situation. The process employed graphite grinding wheel which is always used in ultra-precision grinding of steel piece. The process can obtain good surface quality and ensure certain material removal rate. The ground surface appearance is nearly mirror-like. The lowest surface roughness of Ra value of the ground surface is 0.05μm in the experiment. The ground surface morphology is made up of spread glazed area and dispersed minute pits. The ductile regime dominates the material removal mechanism and no surface damage is induced in the process. In consideration of the results in the experiment it can be seen that grinding with graphite grinding wheel is a good finishing procedure in ferrite machining because of its obtained high surface quality.

Research of Sapphire Wafer Scribing by Using UV Laser

2011 ◽  
Vol 338 ◽  
pp. 90-93
Author(s):  
Mao Lu Wang ◽  
Lei Qin ◽  
Yang Wang ◽  
Ming Zhou
Keyword(s):  
Surface Quality ◽  
Processing Parameters ◽  
Uv Laser ◽  
Sapphire Wafer ◽  
Laser Parameters ◽  
Machining Quality ◽  
Good Surface ◽  
Good Surface Quality ◽  
Series Of Experiments ◽  
Wafer Processing

The Processing advantages of UV laser were discussed in this paper. A series of experiments were carried out, some good results was achieved, which proved UV laser is fit for sapphire wafer processing. Then how processing parameters affects machining quality was discussed, which provides guidance to machining practice. The formation of grooves with good surface quality can be achieved by selecting appropriate laser parameters.

Experimental Study of Low-Pressure Water Jet Assisted Laser Processing of Al2O3 Ceramic

2013 ◽  
Vol 652-654 ◽  
pp. 2363-2368
Author(s):  
Jin Hua Wang ◽  
Gen Fu Yuan
Keyword(s):  
Surface Quality ◽  
Laser Processing ◽  
Thermal Deformation ◽  
Low Pressure ◽  
Processing Parameters ◽  
Water Jet ◽  
Good Surface ◽  
Hard And Brittle Material ◽  
Pressure Water

Recast layer, micro cracks and thermal deformation limited the improvement of the surface quality of laser processing in precision machining of hard and brittle material. This paper presents a new method which combines low-pressure water jet with laser processing. A comprehensive study on the influence of laser processing parameters on surface quality of an Al2O3 ceramic sheet is presented. The experiment was conducted using ND: YAG laser machine and low-pressure water jet was used as assist. The surface quality of normal laser processing and low-pressure water jet assisted laser processing was comparative analyzed using a 3-D microscopy. Experiment proves that the composite processing of low-pressure water jet assisted laser processing can obtain good surface quality, slight moltenslag and thermal deformation, compared with the normal laser processing.

scholarly journals Analytical and Experimental Investigation on Cutting Force in Longitudinal-Torsional Coupled Rotary Ultrasonic Machining Zirconia Ceramics

2021 ◽  
Author(s):  
Fan Chen ◽  
Wenbo Bie ◽  
Yingli Chang ◽  
Bo Zhao ◽  
Xiaobo Wang ◽  
...  
Keyword(s):  
Cutting Force ◽  
Material Removal ◽  
Processing Parameters ◽  
Force Model ◽  
Ultrasonic Machining ◽  
Removal Mechanism ◽  
Rotary Ultrasonic Machining ◽  
Material Removal Mechanism ◽  
Zirconia Ceramics ◽  
The Impact

Abstract Ceramics and other hard-and-brittle materials are very effectively processed by longitudinal-torsional coupled rotary ultrasonic machining (LTC-RUM). However, the cutting force evolution and the effects of processing parameters on the material removal mechanism in LTC-RUM need to be clarified for machining optimization. This paper proposes a cutting force model of the LTC-RUM of zirconia ceramics via the brittle material removal mechanism. Firstly, the kinematic analysis of a single abrasive grain was performed, with further consideration of the material removal volume, the effective contact time, and the impact force per one ultrasonic vibration cycle. Then, the longitudinal-torsional coupled vibration of the core tool was analyzed from the standpoint of wave energy conversion. The analytical model was finalized and experimentally verified by LTC-RUM tests. The cutting force curves predicted via the proposed model were in good agreement with the experimental results. The results obtained are considered instrumental in predicting the effects of processing parameters on cutting force during LTC-RUM of ceramics and their further optimization.

Research on Power Ultrasonic Vibration Honing of Sintered Nd-Fe-B

2012 ◽  
Vol 472-475 ◽  
pp. 962-967 ◽  
Author(s):  
Yun Peng Shao ◽  
Xi Jing Zhu ◽  
Ai Ling Wang ◽  
Zhen Liu
Keyword(s):  
Ultrasonic Vibration ◽  
Material Removal ◽  
Removal Rate ◽  
Processing Parameters ◽  
Machining Process ◽  
Processing Efficiency ◽  
Workpiece Surface ◽  
Optimal Processing ◽  
Orthogonal Experiments ◽  
Power Ultrasonic

The technology of power ultrasonic vibration honing was used for the brittle hard sintered Nd-Fe-B materials in this paper. The feasibility and correctness of machining process was analyzed through experiments. Compared normal process result with orthogonal experiments, it was better to use power ultrasonic vibration honing to obtain parts with less surface roughness and higher material removal rate, and also the optimal processing parameters can be conduct. Therefore, the power ultrasonic vibration honing can be used to improve workpiece surface quality, as well as processing efficiency, precision, which is an effective method for precise machining of sintered Nd-Fe-B materials.

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