Influence of the Parameters of Galvanomechanical Chromium Plating on the Coating Quality and Process Productivity

2018 ◽  
Vol 284 ◽  
pp. 1173-1177
Author(s):  
Oksana N. Gruba ◽  
Irina V. Shmidt ◽  
Anastasia E. Gorodkova
Keyword(s):  
Rotation Speed ◽  
Abrasive Tool ◽  
Electrolyte Temperature ◽  
Coating Quality ◽  
Metal Parts ◽  
Chromium Plating ◽  
Cylindrical Parts ◽  
Mechanical Coating ◽  
Process Productivity

The article deals with the method of obtaining a hard chromium coating with using abrasive tool. The influence of the pressing force of the abrasive tool, the rotation speed of the part, the temperature of the electrolyte on the results of galvanomechanical chromium plating of rotating cylindrical parts has been studied. A special abrasive tool has been developed for use in the galvanic mechanical coating of metal parts. The tool is made on a polymer bond. The effect of the electrolyte temperature on the quality of the precipitated chromium is revealed.

Effect of Abrasive Tools in Galvanomechanical Treatment on the Roughness of the Deposited Chromium Layer

2018 ◽  
Vol 284 ◽  
pp. 1178-1183 ◽  
Author(s):  
D.A. Zherebtcov ◽  
Oksana N. Gruba ◽  
K.R. Smolyakova
Keyword(s):  
Experimental Studies ◽  
The Body ◽  
Abrasive Tool ◽  
Chromium Layer ◽  
Pressing Force ◽  
Hard Chromium ◽  
Chromium Plating ◽  
Cylindrical Parts ◽  
Abrasive Tools

The article deals with the method of obtaining a hard chromium coating on details of the "body of rotation" type with the use of an abrasive tool. The influence of the composition and hardness of the elastic abrasive tool on the results of galvanomechanical chromium plating of rotating cylindrical parts has been studied. Binder compositions for an abrasive tool used to improve the roughness of the deposited chromium layer have been developed. A series of experimental studies has been carried out with chromium plating of steel cylindrical parts with simultaneous abrasive processing. Beforehand, an abrasive tool with previously developed binder formulations was manufactured. The obtained results of the influence of the characteristics of the abrasive tool and its pressing force on the chromium-plated part on the quality of the precipitated chromium made it possible to determine the optimum modes for obtaining a coating of the required thickness. Also, a suitable abrasive tool has been chosen to obtain a coating of proper quality.

Microstructure and Mechanical Properties of FSWed Aluminum Extrusion with Bobbin Tools

2012 ◽  
Vol 706-709 ◽  
pp. 990-995 ◽  
Author(s):  
K. Okamoto ◽  
A. Sato ◽  
Seung Hwan C. Park ◽  
Satoshi Hirano
Keyword(s):  
Mechanical Properties ◽  
Feed Rate ◽  
Rotation Speed ◽  
Tool Design ◽  
Aluminum Extrusion ◽  
Tool Rotation Speed ◽  
Process Robustness ◽  
Tool Rotation ◽  
Process Productivity

Bobbin FSW technique is assessed in terms of process productivity and robustness considering the metallurgical and mechanical qualities of the joint. Several different designed bobbin tools were applied to aluminium A6xxx alloy extrusions, at feed rate of 400-1000mm/min with tool rotation speed of 600-1000rpm. In case of A6068-T6, a joint efficiency of 68% was achieved at 600mm/min, which is almost equivalent to the productivity and quality of the conventional FSWed joints, hence the potential of bobbin FSW technique was suggested. The bobbin tool design was further optimized considering the practical process robustness to the part fit issue, and defect free welds have been achieved for the joints with a set gap up to 1mm. However, the oxide remnant, so called “lazy S” was observed in a joint made with an inadequate designed tool, which significantly deteriorates the mechanical properties.

scholarly journals A Wavelet Approach to Estimate The Quality of Ground Parts

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
E. Rubio ◽  
J.C. Jáuregui-Correa
Keyword(s):  
High Precision ◽  
Automotive Industry ◽  
Manufacturing Process ◽  
Time Frequency ◽  
Metal Parts ◽  
Transient Nature ◽  
Cylindrical Parts ◽  
Inspection Systems

The manufacturing process of metal parts is subjected to machining instabilities that can degrade the surface finishquality and the reliability of products. Some instabilities are of transient nature and traditional inspection systems areunable to adequately estimate the grade of affectation in the finished parts. Time-frequency analyses are techniquesthat overcome these limitations and have recently been incorporated in special industry inspection equipment toimprove the quality of the manufactured parts. Grinding is a process used to get high precision and very smoothsurface in flat or cylindrical parts because of the target applications such as the automotive industry where the higheststandards can be found. This paper reports a technique to estimate the quality of ground parts based on timefrequencytransforms that are used to enhance the defects. This makes it easier to implement the technique forsurface characterization in online pass/no-pass inspection machines. The fundamentals of the methodology arerevised and the technique is applied to the identification of vibration marks in cylindrical ground rods. Results showthat this approach identifies adequately imperfections of transient nature and it is able to estimate the extension andamplitude of the defects on the surface of the manufactured parts.

Effect of Rotation Speed on the Quality of Friction Welded AA 6061/AA 7075 Joints

2014 ◽  
Vol 56 (5) ◽  
pp. 381-385
Author(s):  
Ayhan Orhan ◽  
Yücel Asma
Keyword(s):  
Rotation Speed ◽  
Aa 7075

Evaluation of the quality of dressing of cylindrical parts by transverse rolling using smooth plates

2020 ◽  
pp. 72-76
Author(s):  
S.А. Zaydes ◽  
Le Hong Kuang
Keyword(s):  
Cylindrical Parts ◽  
Rolling Accuracy

The dressing of non-rigid cylindrical parts by transverse rolling by smooth plates is considered. The effect of absolute drafting on the accuracy of the straightness and diametrical size of the product, microstructure, hardness and hardening depth of the strengthened part is experimentally determined. Keywords dressing, absolute drafting, transverse rolling, accuracy, straightness, roundness, [email protected], microstructure, hardness.

Nanosecond laser cleaning for enhanced zinc coating quality of HSLA steel

2021 ◽  
Vol 143 ◽  
pp. 107311
Author(s):  
Lixin Zhu ◽  
Qing Gao ◽  
Bingtao Sun ◽  
Yongjun Ke ◽  
Yang Tan ◽  
...  
Keyword(s):  
Hsla Steel ◽  
Zinc Coating ◽  
Laser Cleaning ◽  
Nanosecond Laser ◽  
Coating Quality

THE INFLUENCE OF INTERSTITIAL IMPURITIES IN THE Zr–Y TARGET ALLOYS ON THE HEAT RESISTING CERAMIC COATING QUALITY

2021 ◽  
pp. 52-61
Author(s):  
S.P. Konokotin ◽  
◽  
R.M. Nazarkin ◽  
Keyword(s):  
High Temperatures ◽  
Ceramic Coating ◽  
Chemical Deposition ◽  
Thermal Barrier ◽  
Coating Process ◽  
Plasma Chemical ◽  
Coating Quality ◽  
Interstitial Impurities ◽  
Argon Ions

The influence of interstitial impurities in the Zr–Y target alloys (manufactured by two different techniques) on the quality of thermal barrier ceramic layers of heat resisting coating are studied in this work. The heat resisting ceramic coating manufactured in the UOKS-2 devices by magnetron medium-feculence plasma–chemical deposition on the surface of components that are used at the high temperatures (above 1150 °C). It was found that when the content of interstitial impurities in the target alloy is more than 0,1% (1000 ppm), the rate of the coating process decreases and has to be maintained by increasing the energy of argon ions. This leads to overheating of the target alloy and the surface of the parts (substrate) which impairs the adhesion of the deposited atoms.

scholarly journals Research on the parameters of producing filamentous textured soybean protein with soybean protein isolated and soybean protein concentrate

2018 ◽  
Vol 238 ◽  
pp. 04006
Author(s):  
Aiping Fei ◽  
Xiaoliang Hao ◽  
Junyu Jiang ◽  
Yong Wang ◽  
Yingxue Teng ◽  
...  
Keyword(s):  
Feed Rate ◽  
Protein Production ◽  
Rotation Speed ◽  
Raw Materials ◽  
Soybean Protein ◽  
Protein Concentrate ◽  
Screw Speed ◽  
Soybean Protein Concentrate

Textured soybean protein (TSP) is a product made from cooking and extrusion of soybean protein, which has been widely used in food, feed and other industries. This text made soybean protein isolated (SPI) and soybean protein concentrate (SPC) as the raw materials to produce filamentous protein production. By experiment, the influence of puffing temperature, screw speed and feed rate on the quality of the protein products was studied. Finally it was concluded that when the temperature of the barrel was 152 °C, the screw rotation speed was 119 rpm, the feed rate was 0.426 kg/min, the TSP product had the biggest expansion degree.

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