Thin Floor Milling Using Moving Support

2021 ◽  
Author(s):  
Jixiong Fei ◽  
Bin Lin ◽  
Tian Huang ◽  
Juliang Xiao
Keyword(s):  
Surface Quality ◽  
High Accuracy ◽  
Experimental Results ◽  
Back Surface ◽  
Depth Of Cut ◽  
Experimental Platform ◽  
Good Surface ◽  
Good Surface Quality ◽  
Novel Approach ◽  
Monolithic Structure

Abstract During milling the thin floor of a pocket which locates on a monolithic structure, it is very difficult to achieve high accuracy and good surface quality due to its low rigidity. In this paper, a novel approach is proposed to overcome the difficulties that encountered during milling of the thin floor. The method is realized by using small axial depth of cut but placing a moving support at the back surface of the thin floor during machining, in which the support will move with the cutter at the same velocity. An experimental platform is built to demonstrate the validation of the proposed method. The experimental results show that the proposed method can effectively improve the accuracy and surface quality during milling the thin floor of a pocket of the monolithic structure.

scholarly journals Analysis and Optimization of Ceramic Cutting Tool In Hard Turning of EN-31 Using Factorial Design

2012 ◽  
pp. 53-58
Author(s):  
Chetan Darshan ◽  
Lakhvir Singh ◽  
APS Sethi
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Analysis Of Variance ◽  
Feed Rate ◽  
Hard Turning ◽  
Flank Wear ◽  
Cutting Speed ◽  
Depth Of Cut ◽  
Good Surface ◽  
En 31

Manufacturers around the globe persistently looking for the cheapest and quality manufactured machined components to compete in the market. Good surface quality is desired for the proper functioning of the produced parts. The surface quality is influenced by cutting speed, feed rate and depth of cut and many other parameters. In the present study attempt has been made to evaluate the performance of ceramic inserts during hard turning of EN-31 steel. The analysis of variance is applied to study the effect of cutting speed, feed rate and depth of cut on Flank wear and surface roughness. Model is found to be statically significant using regression model, while feed and depth of cut are the factor affecting Flank wear and feed is dominating factors for surface roughness. The analysis of variance was used to analyze the input parameters and there interactions during machining. The developed model predicted response factor at 95% confidence level.

The Process Experimental Study on High Efficiency Deep Grinding for 9SiCr Alloy Steel with a CBN Wheel

2013 ◽  
Vol 457-458 ◽  
pp. 172-176
Author(s):  
Zong Fu Guo ◽  
Xiao Min Sheng ◽  
Gui Zhi Xie ◽  
De Zhen Yin ◽  
Wen Xin Li
Keyword(s):  
Surface Quality ◽  
Alloy Steel ◽  
High Efficiency ◽  
Removal Rate ◽  
Grinding Force ◽  
Wheel Speed ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Good Surface ◽  
High Removal Rate

This paper via investigate the process of 9SiCr alloy steel in high efficiency deep grinding to find the rule between grinding wheel speed vs depth of cut ap and speed of table vw with the grinding force and the surface quality. Intend to develop a suitable method of the grinding process of 9SiCr alloy steel in high efficiency deep grinding, to obtain high removal rate and good surface quality.

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.

Research on Influence of Crystal KDP Anisotropy on Critical Condition of Brittle-Ductile Transition in Ultra-Precision Cutting

2006 ◽  
Vol 315-316 ◽  
pp. 725-730 ◽  
Author(s):  
Ming Jun Chen ◽  
Ying Chun Liang ◽  
Jing He Wang ◽  
Shen Dong
Keyword(s):  
Surface Quality ◽  
Critical Condition ◽  
Influence Factors ◽  
Potassium Dihydrogen Phosphate ◽  
Experimental Results ◽  
Depth Of Cut ◽  
Dihydrogen Phosphate ◽  
Brittle Ductile Transition ◽  
Ultra Precision

In order to machine high accuracy Potassium Dihydrogen Phosphate (KDP) crystal part, the indentation experiments are carried out with various loads and various orientation angles. The experimental results show that the critical condition of brittle-ductile transition of KDP has strong anisotropy. Therefore, the influence factors on the surface quality of crystal KDP was discussed, it is shown that influences of the tool's geometry parameter, feed rate and Nominal depth of cut etc on the surface quality of KDP are main. Afterwards the cutting experimental study on crystal KDP material is carried out. The experimental results show that the super-smooth surface quality only can be obtained while KDP is ultra-precision machined in ductile mode.

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.

Development of Advanced Broaching Tool for Machining Titanium Alloy

2012 ◽  
Vol 445 ◽  
pp. 161-166
Author(s):  
Mohammed Sarwar ◽  
Mike Dinsdale ◽  
Julfikar Haider
Keyword(s):  
Surface Quality ◽  
Metal Removal ◽  
Removal Rate ◽  
Cutting Tools ◽  
Vital Role ◽  
Tool Geometry ◽  
Depth Of Cut ◽  
Good Surface ◽  
Tool Performance ◽  
Good Surface Finish

Broaching is a precision multipoint metal removal operation normally employed for manufacturing variety of complex parts having either internal or external features. Broaching can produce high precision and good surface finish at a high metal removal rate. The unique feature of a broach tool is that the feed/depth of cut for the teeth is built into the broach unlike other cutting tools. The tool design (e.g., rise per tooth and tooth geometry) play a vital role in the broach performance. A specially adapted machine tool modified to investigate a single broach tooth has been used. Cutting forces and material removal rate have been measured during experimental work for different combination of broaching parameters and broach tool geometry. The effect of the parameters on the surface quality produced has been established. The characteristics of chips formed have also been defined. Finally, optimum tooth geometry and rise per tooth have been recommended for tool performance, broached surface quality and efficient chip formation. The information provided in this paper will be beneficial for broach tool designers and manufacturing engineers.

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.

Nanofabrication of High-resolution and Nanofocusing X-ray Optics Based on Silicon and Diamond: Obstacles and Progress

2008 ◽  
Vol 1145 ◽  
Author(s):  
Abdel F. Isakovic ◽  
K. Evans-Lutterodt ◽  
A. Stein ◽  
J. B. Warren ◽  
S. Narayanan ◽  
...  
Keyword(s):  
High Resolution ◽  
Surface Quality ◽  
Group Iv ◽  
Ray Optics ◽  
X Ray ◽  
Good Surface ◽  
Good Surface Quality ◽  
Etching Parameters

AbstractNanofocusing, high-resolution X-ray optics demand good surface quality, the absence of tapered sidewalls, and a depth reaching into tens, sometimes hundreds of microns, all requirements that must be satisfied over large areas. In this report, we discuss our motivation for choosing group IV materials (predominantly Si, and C in its diamond form) for nanofocusing and high resolution in the hard X-ray portion of the spectrum. We elaborate on the design and nanofabrication procedures, and detail the etching parameters that offer a path for overcoming obstacles in making better optics. We briefly review tests for the assessing the quality of the optics.

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