scholarly journals The Effect of Process Variables on Work Piece Thickness and Glossiness from Metal Coating in Nickel-Chrome Metal Coating Process

2019 ◽  
Vol 494 ◽  
pp. 012057 ◽  
Author(s):  
A R Sakti ◽  
D Riandadari ◽  
H Zakiyya ◽  
A Prapanca
Keyword(s):  
Metal Coating ◽  
Work Piece ◽  
Coating Process ◽  
Process Variables

scholarly journals Proses elektroplating nikel dengan variasi jarak anoda katoda dan tegangan listrik pada baja ST-41

2020 ◽  
Vol 8 (2) ◽  
Author(s):  
Billy Permadi ◽  
Asroni Asroni ◽  
Eko Budiyanto
Keyword(s):  
Direct Current ◽  
Steel Plate ◽  
Metal Coating ◽  
Coating Process ◽  
Nickel Sulphate ◽  
Constant Voltage ◽  
Adhesion Testing ◽  
Coated Surface ◽  
Metal Products ◽  
Electroplating Process

Electroplating process is a coating process where the deposition of a thin metal coating occurs on a coated surface using direct current and constant voltage. The process of finishing metal products uses Nickel as a coating that serves to improve the properties of the metal so that it resists corrosion and attach importance to the appearance of the metal surface. The metal coating process is carried out by electroplating technique with Nickel which occurs as an anode, and electrolyte uses in this process contained Nickel Sulphate. This study aims to determine the effect of distance variations and electrical pressure on layer thickness and adhesive strength. Anode Material coated with ST-41 Steel Plate with dimensions of 70 x 25 x 20 mm. While the cathode uses nickel (Ni) with dimensions of 10 x 20 x 20 mm. Cathode distance variations with anodes 5, 10, and 15 cm and electrical voltage variations of 3.5 Volts, 5 Volts, and 7.5 Volts. Bath time of 40 minutes and adhesion testing using the Posi Test AT-M Adhesion Tester. The results obtained from this study are the distance of the cathode with the best anode found at a distance of 5 cm and a voltage of 7.5 volts with a thickness of 0.0160 mm. Then the best voltage is at 7.5 Volts with a sticky strength value of> 21.53 MPa.Keywords: Electroplating, Nickel, Anode, Cathode, ST-41 Steel.

Elastohydrodynamic Lubrication Modeling of Hydrodynamic Nanopolishing Process

2012 ◽  
Vol 134 (4) ◽  
Author(s):  
Rinku Mittal ◽  
Ramesh K. Singh ◽  
Suhas S. Joshi
Keyword(s):  
Surface Roughness ◽  
Film Thickness ◽  
Particle Concentration ◽  
Diamond Turning ◽  
Spindle Speed ◽  
Work Piece ◽  
Process Variables ◽  
Polishing Process ◽  
Mean Pressure ◽  
Abrasive Suspension

Nanopolishing processes are used in medical, industrial, telecommunication, optics, and military fields. Hydrodynamic polishing (HDP) is one of the prominent nanopolishing methods in creating nanopolished surfaces on hard and profiled surfaces, where rigid tool-based methods like diamond turning, grinding, and honing have many limitations. This work is focused on modeling of hydrodynamic polishing method. In this method, a film of abrasive suspension is formed between the work-piece surface and a rotating soft tool, which helps in nanopolishing. The past experimental research gives an insight into the process but the process has not been explicitly modeled. Consequently, besides experimental characterization, a numerical/mathematical model of hydrodynamic polishing process is important. This paper presents a model of the HDP process which takes into account the polishing process variables, such as, contact load, spindle speed, tool and work-piece material properties/geometry, and abrasive suspension properties. The response of the model is the pressure distribution and the abrasive film thickness in the polishing zone. To model the elastohydrodynamic process encountered in HDP, the pressure and the film thickness profiles of lubricated isothermal point contacts have been evaluated using the multilevel multi-integration (MLMI) scheme coded in C programming language. Finally, load, tool stiffness, speed, and particle concentration in the suspension have been implicitly correlated to the surface roughness (SR) to evolve a semi-empirical model for surface roughness as a function of mean film thickness and mean pressure. Empirical models for mean film thickness and mean pressure have also been developed as a function of process variables. These models have been developed from a Taguchi L27 orthogonal array wherein the mean pressure/film thickness values have been determined from the model and the average surface roughness values have been measured experimentally. It has been observed that the load does not affect the surface roughness significantly and mean pressure does not change with the change in abrasive size and spindle speed. Abrasive particle concentration has been found to be the most important parameter and it affects the surface roughness significantly.

A STUDY OF DRY COATING PROCESS

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1692-1697
Author(s):  
JOO-PYO HONG ◽  
DONG-KYUN MIN ◽  
DONG-TEAK CHUNG
Keyword(s):  
Zinc Coating ◽  
Cold Extrusion ◽  
Work Piece ◽  
Coating Process ◽  
Element Analysis ◽  
Explicit Finite Element ◽  
Dry Coating ◽  
Optimal Velocity ◽  
Explicit Finite Element Analysis ◽  
Steel Balls

Dry zinc coating processes similar to the shot pinning was studied in the aspects of environmentally benign process to substitute traditional wet type phosphate coating of the work-piece, which is for protection from the deterioration of the surface quality and the shortening of the lifetime of the die during cold extrusion. Experiment and simulation on the collision and coating process of the zinc coated steel balls onto the steel target was performed. Coating patterns on the target and damage of the zinc shell of the ball with respect to the colliding speed were observed during the experiment. Explicit finite element analysis showed the deformation and the fracture of the zinc shell were similar to the experimental results even though the adhesion of the zinc layer onto the work-piece could not be expressed directly. The optimal velocity of the balls was obtained considering effective zinc coating and maximum lifetime of the ball.

Process Parameter Optimization of Hydrostatic Extrusion Using Metaheuristic

2018 ◽  
Vol 17 (04) ◽  
pp. 487-504
Author(s):  
S. Panda ◽  
D. Mishra
Keyword(s):  
Optimization Problems ◽  
Design Procedure ◽  
Work Zone ◽  
Work Piece ◽  
Process Variables ◽  
Billet Temperature ◽  
Entry Zone ◽  
Multi Objective ◽  
Die Life ◽  
Metal Metal

Friction at die work piece interface can be reduced by the presence of lubricant in the entry zone. As the metal–metal contact in the deformation zone is avoided, the deformation force is reduced and at the same time the product quality and die life are improved. So the prediction of minimum film thickness and its control through process variables is gaining interest in the industry. Two multi-objective nonlinear optimization problems are formulated in this study, one using the minimum thermal thickness and billet temperature at the work zone. And the other optimization problem is formulated by including the minimum isothermal thickness at entry zone and the billet temperature at the work zone. These two multi-objective optimization problems have been solved using particle swarm optimization algorithm (PSO). The key process variables are identified by coefficient of variance (COV) analysis. A sensitivity analysis on the process variables is performed to prioritize the process variables. A design procedure is explored to demonstrate the industrial application of this analysis.

Development of MgO–C Refractory Having High Oxidation Resistance by Metal Coating Process

2015 ◽  
Vol 15 (1) ◽  
pp. 514-517
Author(s):  
Eun-Hee Kim ◽  
Geon-Ho Cho ◽  
Hyung-Tea Lim ◽  
Yun-Ki Byeun ◽  
Yeon-Gil Jung
Keyword(s):  
Oxidation Resistance ◽  
Metal Coating ◽  
Coating Process ◽  
High Oxidation ◽  
High Oxidation Resistance

Parametric resonance of plates in a sheet metal coating process

2003 ◽  
Vol 268 (4) ◽  
pp. 679-697 ◽  
Author(s):  
C.H. Kim ◽  
N.C. Perkins ◽  
C.W. Lee
Keyword(s):  
Sheet Metal ◽  
Parametric Resonance ◽  
Metal Coating ◽  
Coating Process

Investigating the performance of powder mixed electric discharge machining of Nimonic 75 by using different tool materials

2018 ◽  
Vol 15 (2) ◽  
pp. 205-215 ◽  
Author(s):  
Ramesh S. ◽  
Jenarthanan M.P.
Keyword(s):  
Electric Discharge ◽  
Work Piece ◽  
Process Variables ◽  
Electric Discharge Machining ◽  
Content Type ◽  
Tool Materials ◽  
Al Powder ◽  
Pulse On Time ◽  
Nimonic 75 ◽  
Super Alloy

Purpose This study aims to focus on experimenting the performance of aluminum (Al) powder mixed electric discharge machining (PMEDM) of two different materials viz plastic mould die steel (AISI P20) and nickel-based super alloy (Nimonic 75). This experimental study also focuses on using three different tool materials such as copper, brass and tungsten to analyze their influence on the process output. These materials find many uses in industrial as well as aerospace applications. The performance measures considered in this work are material removal rate (MRR), tool wear rate (TWR) and surface roughness (SR). Design/methodology/approach The experimental design used in this work is based on Taguchi’s L18 orthogonal array. Besides considering work and tool material as one of the process variables, other process variables are peak current (Ip), pulse on time (Ton) and concentration of powder (Cp). The analysis of variance (ANOVA) is performed on the experimental data to determine the significant variables that influence the output. Findings It is found that copper produced maximum MRR and brass tool exhibited higher TWR. However, the surface finish of the machined work piece was very much improved by using the brass tool. Though the performance of tungsten tool lies between the above two tool materials, it showed very little wear during EDM with or without the addition of Al powder. Originality/value The experimental investigation of PMEDM of nickel-based super alloy (Nimonic 75) has not been attempted before. Besides that, the study on the influence of tungsten tool on the performance of EDM is also very limited.

Sign in / Sign up

Export Citation Format

Share Document