Preparation of parts for coating by granular abrasive media treatment

2020 ◽  
pp. 416-419
Author(s):  
M.A. Tamarkin ◽  
E.E. Tishchenko ◽  
V.M. Troitsky ◽  
A.A. Mordovtsev
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Processing Time ◽  
Quality Parameters ◽  
Technological Operation ◽  
Design Technique ◽  
Part Surface ◽  
Medium Particle

The formation of surface quality parameters of parts treated in granular abrasive media, on the surface of which it is necessary to apply coatings is study. Parameters of trace are determined during interaction of medium particle with part surface. Dependencies for calculating of surface roughness and processing time are established. The design technique of technological operation for preparation of part for coating is described.

scholarly journals Surface quality assurance and process reliability in the processing with a ball-rod hardener

2020 ◽  
Vol 175 ◽  
pp. 05008
Author(s):  
Mikhail Tamarkin ◽  
Elina Tishchenko ◽  
Elena Murugova ◽  
Alexandr Melnikov
Keyword(s):  
Surface Roughness ◽  
Quality Assurance ◽  
Surface Quality ◽  
Technological Process ◽  
Process Design ◽  
Processing Time ◽  
Hardened Layer ◽  
Degree Of Deformation ◽  
Process Reliability

This paper presents the results of research on the processing with a multi-contact vibratory hardening tool ball-rod hardener. Theoretical relationships are derived for the calculation of surface roughness, the depth of the hardened layer, and the degree of deformation. The formula for determining the processing time is identified. The technological process reliability with a ball-rod hardener is investigated. Methodology of the process design with regard to its reliability assurance is presented.

Wire Vibration Modeling and Experimental Analysis for Wire Saw Machining

2019 ◽  
Vol 141 (12) ◽  
Author(s):  
Aofei Tang ◽  
Shujuan Li ◽  
Guigeng Yang ◽  
Lun Li ◽  
Robert G. Landers
Keyword(s):  
Surface Quality ◽  
Process Parameters ◽  
Feed Rate ◽  
Processing Time ◽  
Experimental Studies ◽  
Wire Tension ◽  
Wire Saw ◽  
Part Surface ◽  
Wire Vibration ◽  
The Wire

Abstract Surface roughness is the key index point of wire saw processing silicon carbide (SiC). Many factors influence wafer surface quality, which is determined by the motion of the wire relative to the part. The vibration characteristic of wire saw and the process parameters are concerned factors in this paper, which presents a wire vibration model to study the wire saw vibration law. Experimental studies of a stationary wire are conducted to calibrate the damping coefficient and experimental studies of a moving wire are used to validate the developed model. Simulation, theoretical, and experimental data for wire vibrations during a variety of machining processes are found to compare very well, and the effects of various wire saw process parameters are investigated to analyze the influences of process parameters on wire vibration. It was shown that increasing the wire tension and feed rate, or decreeing the wire length, decreases the wire's first dominant frequency, and that changes in the wire velocity had a negligible effect. Finally, the measurement of the surface morphology and wire saw vibrations for different processing parameters was conducted, and it was seen that increases in the wire velocity and wire tension increases part surface quality and decreases processing time, while an increase in the feed rate decreases both part surface quality and processing time. The results show a clear correlation between the amplitude of the wire vibration outside of the processing zone and the part surface quality.

ENSURING SURFACE QUALITY AND PROCESS RELIABILITY DURING BALL-ROD HARDENING TREATMENT

2020 ◽  
Author(s):  
M.A. Tamarkin ◽  
◽  
E.E. Tishchenko ◽  
T.S. Sosnitskaya ◽  
A.G. Kohanyuk ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Technological Process ◽  
Process Design ◽  
Processing Time ◽  
Degree Of Deformation ◽  
Hardening Treatment ◽  
Reinforcing Agent ◽  
Process Reliability ◽  
Vibration Impact

The article presents the results of research of the process of treatment with a multi-contact vibration impact tool - ball-rod reinforcement. Theoretical constraints are derived to calculate surface roughness, depth of strengthened layer and degree of deformation. The formula for determining the processing time is presented. Reliability of technological process of treatment with ball-rod reinforcing agent is investigated. Method of process design with due regard to its reliability is presented.

Study of vibration treatment of external and internal surfaces of parts during their preparation for coating

2021 ◽  
pp. 22-26
Author(s):  
M.A. Tamarkin ◽  
E.E. Tishchenko ◽  
A.A. Mordovtsev ◽  
A.G. Kokhanyuk
Keyword(s):  
Surface Roughness ◽  
Processing Time ◽  
Internal Surface ◽  
Quality Parameters ◽  
Sample Mass ◽  
Vibration Treatment ◽  
Internal Surfaces ◽  
Technological Processing

The formation of quality parameters of the external and internal parts surfaces processed to vibration treatment in the abrasive granules is studied. Dependencies for determining of the surface roughness and processing time are obtained. The processing features of the external and internal surfaces and the differences between them are determined. It is revealed that the established roughness of the internal surface is higher than the external, and the sample mass practically does not affect on the established roughness. Technological recommendations are given for vibration technological processing design that ensure the part preparing for further coating.

scholarly journals Processing of convex complex surfaces with toroidal milling versus ball nose end mill

2018 ◽  
Vol 178 ◽  
pp. 01003
Author(s):  
Andrei Oşan ◽  
Mihai Bănică ◽  
Vasile Năsui
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Processing Time ◽  
Working Time ◽  
End Mill ◽  
Complex Surfaces ◽  
Milling Tool

The paper aims to analyse the processing of convex complex surfaces with toroidal milling cutters compared to spherical milling cutters. As comparison terms, surface roughness and processing time are taken into account. The main purpose of the paper is to demonstrate the usefulness of the toroidal milling tool that can be replaced in case of spherical milling cuts to improve the working time as well as the surface quality, these terms playing an important role in the processing of convex complex surfaces.

Improving Surface Finish Quality of Rapid Tooling via Surface Contact Infiltration of 3-D Printed Metal Parts

2006 ◽  
Author(s):  
Brady B. Godbey ◽  
David C. Angstadt
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Surface Finish ◽  
Contact Surface ◽  
Complex Geometry ◽  
Solid Freeform Fabrication ◽  
Free Surfaces ◽  
Freeform Fabrication ◽  
Part Surface ◽  
Secondary Operations

Solid freeform fabrication technology has shown a great deal of promise for the plastic injection molding industry due to its ability to produce complex geometry tooling relatively quickly. However, one shortcoming of metal-based SFF processes is that they have difficulty producing parts with acceptable surface quality. As such, secondary operations, such as machining, are frequently required thereby increasing fabrication time and cost. In addition, there is variation in the surface quality that is dependent upon the surface orientation during the build process. For example, parts produced using the metal-based 3-D printing process have vertical faces with a typical roughness 52% greater than the horizontal faces. This work investigates the effects on part surface quality resulting from the application of a contact surface "blank" to the part free surfaces during the infiltration stage of a powder metalbased rapid manufacturing process. Specifically, the effects of "blank" surface roughness and contact pressure are studied with respect to resultant surface roughness and uniformity of the infiltrated part. Application of a smooth contact surface on vertical faces resulted in Ra values at least 25% lower than that of vertical free surfaces. It was also revealed that there is a correlation between surface roughness of the blank and the surface roughness of the infiltrated part. Such blanks could be used to impart desired surface finish and texture to critical surfaces of a mold tool.

scholarly journals Improving surface quality in selective laser melting based tool making

2021 ◽  
Author(s):  
Filippo Simoni ◽  
Andrea Huxol ◽  
Franz-Josef Villmer
Keyword(s):  
Surface Roughness ◽  
Additive Manufacturing ◽  
Surface Quality ◽  
Selective Laser Melting ◽  
Melting Process ◽  
Laser Remelting ◽  
Laser Melting ◽  
Great Cost ◽  
Starting Point ◽  
Processing Techniques

AbstractIn the last years, Additive Manufacturing, thanks to its capability of continuous improvements in performance and cost-efficiency, was able to partly replace and redefine well-established manufacturing processes. This research is based on the idea to achieve great cost and operational benefits especially in the field of tool making for injection molding by combining traditional and additive manufacturing in one process chain. Special attention is given to the surface quality in terms of surface roughness and its optimization directly in the Selective Laser Melting process. This article presents the possibility for a remelting process of the SLM parts as a way to optimize the surfaces of the produced parts. The influence of laser remelting on the surface roughness of the parts is analyzed while varying machine parameters like laser power and scan settings. Laser remelting with optimized parameter settings considerably improves the surface quality of SLM parts and is a great starting point for further post-processing techniques, which require a low initial value of surface roughness.

scholarly journals Influence of High-Productivity Process Parameters on the Surface Quality and Residual Stress State of AISI 316L Components Produced by Directed Energy Deposition

2021 ◽  
Author(s):  
Gabriele Piscopo ◽  
Alessandro Salmi ◽  
Eleonora Atzeni
Keyword(s):  
Surface Roughness ◽  
Residual Stresses ◽  
Surface Quality ◽  
Process Parameters ◽  
Energy Deposition ◽  
Industrial Applications ◽  
High Productivity ◽  
Directed Energy Deposition ◽  
Productivity Process ◽  
Directed Energy

AbstractThe production of large components is one of the most powerful applications of laser powder-directed energy deposition (LP-DED) processes. High productivity could be achieved, when focusing on industrial applications, by selecting the proper process parameters. However, it is of crucial importance to understand the strategies that are necessary to increase productivity while maintaining the overall part quality and minimizing the need for post-processing. In this paper, an analysis of the dimensional deviations, surface roughness and subsurface residual stresses of samples produced by LP-DED is described as a function of the applied energy input. The aim of this work is to analyze the effects of high-productivity process parameters on the surface quality and the mechanical characteristics of the samples. The obtained results show that the analyzed process parameters affect the dimensional deviations and the residual stresses, but have a very little influence on surface roughness, which is instead dominated by the presence of unmelted particles.

scholarly journals Investigation on the Surface Quality Obtained during Trochoidal Milling of 6082 Aluminum Alloy

Machines ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 75
Author(s):  
Nikolaos E. Karkalos ◽  
Panagiotis Karmiris-Obratański ◽  
Szymon Kurpiel ◽  
Krzysztof Zagórski ◽  
Angelos P. Markopoulos
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Process Parameters ◽  
Manufacturing Industry ◽  
High Surface ◽  
Cutting Tools ◽  
Cutting Speed ◽  
Depth Of Cut ◽  
High Surface Quality ◽  
Trochoidal Milling

Surface quality has always been an important goal in the manufacturing industry, as it is not only related to the achievement of appropriate geometrical tolerances but also plays an important role in the tribological behavior of the surface as well as its resistance to fatigue and corrosion. Usually, in order to achieve sufficiently high surface quality, process parameters, such as cutting speed and feed, are regulated or special types of cutting tools are used. In the present work, an alternative strategy for slot milling is adopted, namely, trochoidal milling, which employs a more complex trajectory for the cutting tool. Two series of experiments were initially conducted with traditional and trochoidal milling under various feed and cutting speed values in order to evaluate the capabilities of trochoidal milling. The findings showed a clear difference between the two milling strategies, and it was shown that the trochoidal milling strategy is able to provide superior surface quality when the appropriate process parameters are also chosen. Finally, the effect of the depth of cut, coolant and trochoidal stepover on surface roughness during trochoidal milling was also investigated, and it was found that lower depths of cut, the use of coolant and low values of trochoidal stepover can lead to a considerable decrease in surface roughness.

Observation in the Surface Roughness of Silicon Wafer during Semi-Fixed Abrasive Machining with Large Grains

2009 ◽  
Vol 69-70 ◽  
pp. 253-257
Author(s):  
Ping Zhao ◽  
Jia Jie Chen ◽  
Fan Yang ◽  
K.F. Tang ◽  
Ju Long Yuan ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Silicon Wafer ◽  
Processing Parameters ◽  
Wafer Surface ◽  
Abrasive Machining ◽  
Fixed Abrasive ◽  
Is Failure ◽  
Better Than

Semi-fixed abrasive is a novel abrasive. It has a ‘trap’ effect on the hard large grains that can prevent defect effectively on the surface of the workpiece which is caused by large grains. In this paper, some relevant experiments towards silicon wafers are carried out under the different processing parameters on the semi-fixed abrasive plates, and 180# SiC is used as large grains. The processed workpieces’ surface roughness Rv are measured. The experimental results show that the surface quality of wafer will be worse because of higher load and faster rotating velocity. And it can make a conclusion that the higher proportion of bond of the plate, the weaker of the ‘trap’ effect it has. Furthermore the wet environment is better than dry for the wafer surface in machining. The practice shows that the ‘trap’ effect is failure when the workpiece is machined by abrasive plate which is 4.5wt% proportion of bond in dry lapping.

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