Parameters Research of Precise Straightening Process in Roll Straightener

2015 ◽  
Vol 1095 ◽  
pp. 800-803
Author(s):  
Qiang Chen ◽  
Shan Li ◽  
Ying Luo ◽  
Wen Long Lu
Keyword(s):  
Computer Simulation ◽  
Electrochemical Machining ◽  
Electrolytic Cell ◽  
Copper Cathode ◽  
Optimization Analysis ◽  
High Quality ◽  
Plate Method ◽  
Plate Spacing ◽  
Urgent Task ◽  
Computer Optimization

Refined copper to obtain high quality can use the electrolytic method; the copper cathode plate is applied to the electrochemical machining. In order to make copper cathode plate has high flatness, assuring electrolytic cell cathode and anode plate spacing, so that the purity of copper electrolysis precipitation is higher, so change the straightening plate method has become the urgent task of the enterprise. Through the computer simulation, the ANSYS/LS-DYNA computer optimization, analysis precise straightening device parameters, in ensuring the copper starting sheet straightening can meet basic factories requirements, improve the machining precise straightening machine and copper starting sheet straightening efficiency.

Significance of educational modeling during the COVID-19 coronavirus pandemic

2020 ◽  
pp. 57-64
Author(s):  
E.V. Karpovich
Keyword(s):  
Computer Simulation ◽  
Power Systems ◽  
Thermal Power ◽  
Educational Process ◽  
Quality Education ◽  
High Quality ◽  
High Quality Education ◽  
Distant Learning ◽  
Automation Systems ◽  
Detailed Presentation

The article shows computer simulation of the mechanical, thermal power systems and electronics and automation systems for the modern educational process organized remotely during the COVID-19 coronavirus pandemic. The article describes the computer models made by the author, analyzes and highlights the positive aspects of such simulation for conducting distant learning experiments, visual and detailed presentation of theoretical material and making conditions for obtaining high-quality education even under difficult pandemic conditions.

scholarly journals Scientific and practical fundamentals of growing cabbage (Brassica capitata lizg.) in Uzbekistan

2021 ◽  
Vol 939 (1) ◽  
pp. 012044
Author(s):  
A J Shokirov ◽  
S S Lapasov ◽  
K J Shokirov
Keyword(s):  
Large Scale ◽  
Scientific Research ◽  
Mineral Fertilizers ◽  
Biological Productivity ◽  
High Quality ◽  
Planting Time ◽  
Yield And Quality ◽  
White Cabbage ◽  
Urgent Task

Abstract At present, scientific research is underway to further develop vegetable growing in the secondary crop, in particular to further increase the yield and quality of white cabbage, to select a system of planting time-sowing scheme that maximizes the biological productivity of varieties, and to apply the most optimal standards of fertilization and irrigation. In this regard, the urgent task remains to determine the optimal varieties of cabbage that can be grown in repeated crops, their optimal planting scheme, timing, development and implementation of optimal standards for each variety of mineral fertilizers and irrigation, and its solution is large-scale throughout the country. Besides that a number of problematic issues are addressed, which could allow to get high and high-quality harvest of white cabbage in repeated sowing in grain-free areas.

Study on Influence of Insulating Clapboard in the Process of Electrolytic Cleaning for Cold-Rolled Strip

2013 ◽  
Vol 744 ◽  
pp. 219-222
Author(s):  
Jing Gao Wu ◽  
Shuai Fang Li ◽  
Xiao Kui Liu
Keyword(s):  
Finite Element ◽  
Current Efficiency ◽  
Potential Distribution ◽  
Equipotential Surface ◽  
Electrolytic Cell ◽  
Rolled Strip ◽  
Finite Element Software ◽  
Plate Spacing ◽  
Cold Rolled ◽  
Simulation Results

Two models with and without insulating clapboard were established. The electric potential distribution and the flow of electric current in electrolytic cell under the two models were simulated by Ansoft finite element software. The results show that the distribution of equipotential surface is the most intensive in the area close to the electric plate,and the current in the cell obviously skewed flows to the bottom of the strip under the insulating clapboard model , which is important to improve the current efficiency of the electrolytic cleaning. Finally, the influence of insulating clapboard on current efficiency and under different plate spacing were carried on by experiment and analysis, proved the correctness of the simulation results.

On the Deep Small Hole Machining Method of Nickel-Based High-Temperature Alloy

2011 ◽  
Vol 199-200 ◽  
pp. 1874-1879
Author(s):  
Shi Chun Di ◽  
Zhao Long Li ◽  
Dong Bo Wei
Keyword(s):  
High Temperature ◽  
Electrochemical Machining ◽  
Machining Process ◽  
Speed Ratio ◽  
High Temperature Alloy ◽  
Technological Parameters ◽  
High Quality ◽  
Radial Overcut ◽  
The Mathematical Model ◽  
Hole Machining

In this paper, a machining method of deep hole on the nickel-based high-temperature alloy using the pulse electrochemical machining is proposed. The effect of five technological parameters on the depth-averaged radial overcut of the hole to be machined in the machining process is discussed; then the mathematical model is built, and the effect of parameters on the overcut is illustrated. The speed ratio is determined to judge the quality and the processing performance of holes. The technological parameters adopted in the experiment, can be used to produce effectively high-quality hole of big proportion of depth to diameter on the nickel-based high-temperature alloy in the machining process.

Research on NC Electrochemical Mechanical Drilling

2012 ◽  
Vol 271-272 ◽  
pp. 476-482
Author(s):  
Wei Min Gan ◽  
Bo Xu ◽  
Zhi Fang Zhao
Keyword(s):  
Stainless Steel ◽  
Electrochemical Machining ◽  
304 Stainless Steel ◽  
High Temperature Alloy ◽  
Mechanical Grinding ◽  
High Quality ◽  
Taper Angle ◽  
Composite Cathodes ◽  
High Efficient ◽  
Drilling Method

NC electrochemical mechanical drilling was based on NC, Electrochemical machining and mechanical grinding. It drilled with different diameter composite cathodes. This kind of drilling method took the advantages of electrochemical mechanical, so it was not restricted by parts’ strength, hardness and stiffness. The cover of cathode ensured the drilling precision. So this technology should be studied. This paper took 304 stainless steel and high temperature alloy GH710 to do study, at last the reasonable and high efficient process parameters were found in the experiment. The high quality holes of better roundness and small taper angle were drilled. The results showed that the study of NC electrochemical mechanical drilling difficult-to-machine materials was very meaningful.

scholarly journals Study on Ultrasonic Assisted Electrochemical Drill-Grinding of Superalloy

Chemosensors ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 62
Author(s):  
Huanghai Kong ◽  
Yong Liu ◽  
Xiangming Zhu ◽  
Tengfei Peng
Keyword(s):  
Surface Quality ◽  
Ultrasonic Vibration ◽  
High Speed ◽  
Electrochemical Machining ◽  
Machining Parameters ◽  
Mechanical Grinding ◽  
High Quality ◽  
Passive Behavior ◽  
Ultrasonic Assisted ◽  
Small Holes

Electrochemical grinding (ECG) technique composed of electrochemical machining (ECM) and mechanical grinding is a proper method for machining of difficult-to-cut alloys. This paper presents a new ultrasonic assisted electrochemical drill-grinding (UAECDG) technique which combines electrochemical drilling, mechanical grinding, and ultrasonic vibration to fabricating high-quality small holes on superalloy. By applying ultrasonic vibration to high-speed rotating electrode in ECG, machining stability, efficiency, and surface quality can be obviously improved. Firstly, the electrochemical passive behavior of superalloy is studied, the mathematical model and simulation of gap electric field are established. Then, several experiments are conducted to investigate the influence of applied voltage, feed rate and ultrasonic amplitude on the machining quality. The balance of material removal between electrochemical reaction and mechanical grinding is achieved by optimizing the machining parameters. It reveals that the surface quality as well as machining stability and efficiency can be significantly improved by applying rotating ultrasonic vibration to the ECG process. Finally, several small holes of high quality have been machined successfully along with surface roughness of hole sidewall decreases from Ra 0.99 μm to Ra 0.14 μm by UAECDG.

Electrochemical Machining—Prediction and Correlation of Process Variables

1966 ◽  
Vol 88 (4) ◽  
pp. 455-461 ◽  
Author(s):  
J. Hopenfeld ◽  
R. R. Cole
Keyword(s):  
Flow Rate ◽  
Metal Removal ◽  
Electrochemical Machining ◽  
Electrolytic Cell ◽  
Process Variables ◽  
Electrode Gap ◽  
Electrolyte Flow ◽  
Normal Current Density ◽  
Anode Dissolution ◽  
Bubble Layer

The relationship between total current, applied potential, electrolyte flow rate, electrolyte conductivity, and electrode gap in electrochemical machining was investigated experimentally and analytically. An electrolytic cell was designed permitting the electrode gap to be observed and photographed. A 0.25 × 0.375-in. rectangular 1100F aluminum anode was used. Electrode gap varied between 0.013 and 0.033 in. The electrolyte was potassium chloride in concentrations from 0.67 normal to 1.7 normal. Current density range was 40–450 amp/in. and electrolyte flow rate was 0.22 to 0.98 gal/min. The photographs taken of the electrode gap during operation clearly show development of a hydrogen bubble layer next to the cathode. Based upon a mathematical model incorporating the bubble layer, an equation in a nondimensional form has been derived describing the functional relationship between process variables. This equation correlates the experimental data within plus or minus 15 percent. An equation which predicts the local current distribution, and hence anode dissolution rate, along the electrode gap in the direction of electrolyte flow is also presented. Based on the theoretical analysis, optimum operation in electrochemical machining from the standpoint of uniformity of metal removal is discussed.

Control Volume Simulation of Casting Directional Solidification

2014 ◽  
Vol 790-791 ◽  
pp. 146-151 ◽  
Author(s):  
Imre Budavari ◽  
Daniel Molnar
Keyword(s):  
Computer Simulation ◽  
Directional Solidification ◽  
Control Volume ◽  
Solidification Process ◽  
Control Volume Method ◽  
High Quality ◽  
Large Steel ◽  
Steel Castings ◽  
Uniform Wall ◽  
Volume Method

Quality demands of castings is elemental in recent years and becoming more stringent. Foundries are faced by the need to produce high quality castings, but nonetheless to produce them economically. To fulfill this demand, experimental castings, especially in case of individual production or small runs, are uneconomical. In these cases computer simulation can be the only economical tool for testing and approval. The modulus technique of Chvorinov is an applicable method to examine the local solidification process and to determine the application of chills, geometry modification and feeding. Numerically the control volume method is used to check the solidification process of large steel castings with non-uniform wall thicknesses.

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