Analysis and Study on Surface Quality of Workpiece of Short Electric Arc Machining Process

2012 ◽  
Vol 522 ◽  
pp. 47-51 ◽  
Author(s):  
Jian Ping Zhou ◽  
Yan Xu ◽  
Jun Ze Zhang ◽  
Bo Ma
Keyword(s):  
Surface Quality ◽  
Design Method ◽  
Orthogonal Experiment ◽  
Electric Arc ◽  
Machining Process ◽  
Test Results ◽  
Range Analysis ◽  
The Poor ◽  
Process Factors

Owing to the Poor Surface Quality of Workpiece Processed by SEAM, the Work Used the Design Method of Orthogonal Experiment to Search for the Rules between Process Factors and Surface Quality of Machining. through the Range Analysis of Test Results and the Establishment of Process Regression Equation to Find the Rules between the Surface Quality of Workpiece and Process Factors, the Paper Provided the Test and Theoretical Basis to Achieve the Purpose of Improving the Surface Quality of Workpiece of Short Electric Arc Machining Process.

Experimental Study on Surface Quality in Micro-Milling of Single Crystal Superalloy

2016 ◽  
Vol 1136 ◽  
pp. 196-202
Author(s):  
Qi Gao ◽  
Ya Dong Gong ◽  
Yun Guang Zhou
Keyword(s):  
Single Crystal ◽  
Surface Quality ◽  
Orthogonal Experiment ◽  
Single Crystal Superalloy ◽  
Micro Milling ◽  
Range Analysis ◽  
Milling Tool ◽  
The Impact ◽  
The Ideal

Single crystal Ni3Al-based superalloy has excellent comprehensive performance.To study the micro-milling surface quality of Ni3Al-based superalloy, this article used two-edged carbide alloy micro-milling tool with 0.8mm diameter, then orthogonal experiment of three factors and five levels was implemented to the micro-milling of typical single crystal Ni3Al-based superalloy IC10. The primary and secondary factors of the impact on the micro-milling surface quality were found from spindle speed, feed rate, milling depth by range analysis, and the ideal cutting process parameters combination was optimized and obtained, then its cutting mechanism and the reason of affecting the surface quality were analyzed. The experiment result has certain guiding significance to the micro-milling mechanism of single crystal superalloy.

Study on Rules in Material Removal Rate and Surface Quality of Short Electric Arc Machining Process

2008 ◽  
Vol 33-37 ◽  
pp. 1313-1318 ◽  
Author(s):  
Jian Ping Zhou ◽  
Chu Hua Liang ◽  
Wen Jing Teng ◽  
Yan Xu ◽  
Bi Sheng Zhou
Keyword(s):  
Low Voltage ◽  
Removal Rate ◽  
Orthogonal Experiment ◽  
Electric Arc ◽  
Machining Process ◽  
Machining Efficiency ◽  
Workpiece Material ◽  
Process Indicators ◽  
Mixed Medium

Short electric arc machining (SEAM) is a non-conventional machining process that utilizes an arc to melt and vaporize workpiece material. A low voltage, high current supply is employed to produce a continuous arc in either a water-air mixed medium or in air. This paper describes an investigation into the optimization of the SEAM machining efficiency based on experimental design which considers both electrical parameters and machine parameters. The work uses the orthogonal experiment processes to research the influence of the process indicators on machining efficiency.

Study on the Surface Quality of Silicon Nitride Ceramics in Ultrasonic Vibration Grinding

2013 ◽  
Vol 579-580 ◽  
pp. 144-147 ◽  
Author(s):  
Guo Jun Dong ◽  
Ming Zhou ◽  
Shao Nan Huang
Keyword(s):  
Silicon Nitride ◽  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Machining Process ◽  
Test Results ◽  
Cutting Depth ◽  
Silicon Nitride Ceramic ◽  
Nitride Ceramics ◽  
Conventional Machining

The conventional machining method for silicon nitride ceramics has low machining efficiency, prone to cracking, chipping and other defects. In this paper, the author carried out a study on the influence of ultrasonic vibration grinding on surface quality of silicon nitride ceramic, and carried out ultrasonic vibration grinding process test for silicon nitride ceramic and conducted the analysis of influence of this machining process on surface quality with orthogonal test. The test results showed that the influence on surface roughness decreased in the order of spindle speed, feed rate, cutting depth, and amplitude of vibration.

scholarly journals Enhancing the Surface Quality of Micro Titanium Alloy Specimen in WEDM Process by Adopting TGRA-Based Optimization

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1440 ◽  
Author(s):  
Muthuramalingam Thangaraj ◽  
Ramamurthy Annamalai ◽  
Khaja Moiduddin ◽  
Mohammed Alkindi ◽  
Sundar Ramalingam ◽  
...  
Keyword(s):  
Decision Making ◽  
Surface Quality ◽  
Process Parameters ◽  
Quality Measures ◽  
Machining Process ◽  
Optimal Process ◽  
Input Process ◽  
Process Factors ◽  
Wedm Process

The surface measures of machined titanium alloys as dental materials can be enhanced by adopting a decision-making algorithm in the machining process. The surface quality is normally characterized by more than one quality parameter. Hence, it is very important to establish multi-criteria decision making to compute the optimal process factors. In the present study, Taguchi–Grey analysis-based criteria decision making has been applied to the input process factors in the wire EDM (electric discharge machining) process. The recast layer thickness, wire wear ratio and micro hardness have been chosen to evaluate the quality measures. It was found that the wire electrode selection was the most influential factor on the quality measures in the WEDM process, due to its significance in creating spark energy. The optimal arrangement of the input process parameters has been found using the proposed approach as gap voltage (70 V), discharge current (15 A) and duty factor (0.6). It was proved that the proposed method can enhance the efficacy of the process. Utilizing the computed combination of optimal process parameters in surface quality analysis has significantly contributed to improving the quality of machining surface.

scholarly journals A Proposed Scan Strategy Used on SLM Inner Structure Part

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 937 ◽  
Author(s):  
Jitai Han ◽  
Meiping Wu ◽  
Weipeng Duan
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Laser Energy ◽  
Side Surface ◽  
Test Results ◽  
New Strategy ◽  
Optimal Surface ◽  
The Relationship ◽  
Main Factor

A model with an inner structure was designed to study the relationship between the surface quality of the inner structure and the scan strategy in this study. The test results showed that the precision of the inner structure was highly affected by the scan strategy, and the specimens printed using different strategies showed different performances on the surface quality of the inner structure. The specimen printed using the square-framed scan strategy had a lower flatness value on the positive face of the inner structure compared to that of the other two specimens printed using Z-shape scan strategies, while the specimen printed using the Z-shape scan strategy (along the inner structure) had a relative optimal surface roughness on the side surface of the inner structure in all three specimens. The bending deformation caused by the scan strategies was considered to be the main factor affecting the flatness on the positive surface, while laser energy fluctuation showed a significant impact on side surface roughness. Combined with the experimental data, a new scan strategy was proposed; we found that the specimen printed using this new strategy improved positive surface flatness and side surface roughness.

Modeling of Delamination in Drilling of Particleboard (PB) Composite Panels

2015 ◽  
Vol 766-767 ◽  
pp. 825-830
Author(s):  
T.N. Valarmathi
Keyword(s):  
Surface Quality ◽  
Machining Process ◽  
Drilling Process ◽  
Composite Panels ◽  
Wood Composite ◽  
Control Parameters ◽  
Taguchi Design Of Experiments ◽  
Input Control ◽  
Twist Drills

Wood composite panels are widely used in construction and furniture industries. They are very much preferred in interior and exterior decoration, house hold products and toys, etc. because of the aesthetic appearance and their high-quality properties. In manufacturing of wood composite products various machining process are used. In final assembly of various parts of a end product, drilling is the most commonly used machining operation. The cutting forces developed during drilling process having more effect on the surface quality of the drilled holes. Hence the drilling damages like delamination must be controlled to ensure the surface quality of the final product. In controlling these forces the contribution of input drilling parameters is more. The objective of this work is to study the influence of input control parameters to obtain the optimal cutting conditions. In the present study the drilling experiments are performed using Taguchi design of experiments with Taguchi L27 orthogonal array on particleboard (PB) composite panels using high speed steel (HSS) twist drills with three different drill diameters. Response surface methodology (RSM) is used to develop a mathematical model to predict the influence of input control parameters on delamination. The adequacy of the model is checked using Analysis of variance. It is revealed that high spindle speed with low feed rate and smaller drill diameter combination gives better results.

Analysis of Machinability of Ti- and Ni-Based Alloys

2012 ◽  
Vol 188 ◽  
pp. 330-338 ◽  
Author(s):  
Agostino Maurotto ◽  
Anish Roy ◽  
Vladimir I. Babitsky ◽  
Vadim V. Silberschmidt
Keyword(s):  
Surface Quality ◽  
Cutting Forces ◽  
Material Removal ◽  
Process Zone ◽  
Machining Process ◽  
Work Piece ◽  
Machining Parameters ◽  
Removal Rates ◽  
Conventional Machining

Efficient machining of advanced Ti- and Ni-based alloys, which are typically difficult-to-machine, is a challenge that needs to be addressed by the industry. During a typical machining operation of such alloys, high cutting forces imposed by a tool on the work-piece material lead to severe deformations in the process zone, along with high stresses, strains and temperatures in the material, eventually affecting the quality of finished work-piece. Conventional machining (CT) of Ti- and Ni-based alloys is typically characterized by low depths of cuts and relatively low feed rates, thus adversely affecting the material removal rates (MRR) in the machining process. In the present work, a novel machining technique, known as Ultrasonically Assisted Turning (UAT) is shown to dramatically improve machining of these intractable alloys. The developed machining process is capable of high MRR with an improved surface quality of the turned work-piece. Average cutting forces are significantly lower in UAT when compared to those in traditional turning techniques at the same machining parameters, demonstrating the capability of vibration-assisted machining as a viable machining method for the future.

Surface Roughness Research in Turning of Damage-Tolerant Titanium Alloy

2014 ◽  
Vol 633-634 ◽  
pp. 743-746
Author(s):  
Tao Sun ◽  
Zhuo Chen
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
Predictive Model ◽  
High Reliability ◽  
Orthogonal Experiment ◽  
High Strength ◽  
Test Results ◽  
Urgent Problem ◽  
Damage Tolerant

TC21 is a first high strength and damage-tolerant titanium alloy self-developed in China, which has independent intellectual property. As it is known to all, titanium alloy TC21 is one of the most widely used materials in aerospace. The improvement of cutting quality of titanium alloy is an urgent problem. In this paper, the orthogonal experiment were carried out to study surface roughness of turning TC21. The predictive model of surface roughness in turning TC21 was built by analysis of multivariable linear regression on the basis of experiment. Statistical test results indicated the established predictive model were in highly notable test status and had high reliability. These works provide references for machining TC21.

Effects of Electricity Parameters on Surface Quality of Reaction Bonded Silicon Carbide Ceramic with Electrical Discharge Diamond Grinding

2016 ◽  
Vol 874 ◽  
pp. 15-21 ◽  
Author(s):  
Xiao Shuang Rao ◽  
Fei Hu Zhang ◽  
Chen Li
Keyword(s):  
Surface Roughness ◽  
Silicon Carbide ◽  
Surface Quality ◽  
Electrical Discharge ◽  
Machining Process ◽  
Hybrid Machining ◽  
Micro Cracks ◽  
Sic Ceramic ◽  
Hybrid Machining Process

With some conductivity and low grinding affectivity, a hybrid machining process termed electrical discharge diamond grinding (EDDG) is applied to the precision machining of reaction bonded silicon carbide (RB-SiC) ceramic. As there is electrical spark in the hybrid machining process, the electrical parameters are varied to explore their effects on the surface quality of RB-SiC ceramic with EDDG. In this paper, the experiments of different polarity and gap voltage with EEDG were investigated, and the microstructure and surface roughness on the machined surface of RB-SiC ceramic were analyzed. The surface morphology and micro-cracks were examined with a scanning electron microscope, and the surface roughness was measured with a confocal scanning laser microscope. It is found that surface roughness initially increases and then decreases with increase of the gap voltages and is higher with negative polarity than that with positive polarity. The micromorphology Micro-cracks were observed on the surface machined and are outstanding in re-solidified zone with EDDG.

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