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.

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.

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.

Improvement of Surface Quality of Casting Produced by Casting under Pressure

2017 ◽  
Vol 265 ◽  
pp. 988-993 ◽  
Author(s):  
R.V. Gavariev ◽  
I.A. Savin
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Technological Process ◽  
Vapour Deposition ◽  
Entire Period ◽  
Deposition Method ◽  
Technological Parameters ◽  
Pilot Studies ◽  
Compression Mold

The article considers the surface roughness of compression molds castings received by casting under pressure depending on the condition of the form-building surface. The technological process of casting under pressure is presented for the "Strike plate" product, concrete technological parameters values are specified. The pilot studies of the roughness of the castings throughout the entire period of operation of a compression mold are conducted. Based on the received values the recommendations about improvement of quality of a surface of castings by drawing sheetings are submitted by phisical vapour deposition method.

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.

scholarly journals Technological design processes of vibration processing of particularly accurate parts of agricultural machinery

2021 ◽  
Vol 273 ◽  
pp. 07032
Author(s):  
Mikhail Tamarkin ◽  
Elina Tishchenko ◽  
Elena Murugova
Keyword(s):  
Surface Roughness ◽  
Process Design ◽  
Processing Time ◽  
Metal Removal ◽  
Experimental Studies ◽  
Design Procedure ◽  
Theoretical Studies ◽  
Agricultural Machinery ◽  
Technological Design ◽  
Design Processes

This paper presents the research results on the process of vibration abrasive processing of particularly accurate parts of agricultural machinery. Process peculiarities are described. The theoretical studies of metal removal calculation, surface roughness and processing time for solving various technological problems are presented. Experimental studies have been carried out confirming the adequacy of theoretical formulas. Process design procedure has been developed.

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.

The mechanism of process parameters influencing the AlSi10Mg side surface quality fabricated via laser powder bed fusion

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shimin Dai ◽  
Hailong Liao ◽  
Haihong Zhu ◽  
Xiaoyan Zeng
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Process Parameters ◽  
Laser Power ◽  
Side Surface ◽  
Laser Powder Bed Fusion ◽  
Scanning Velocity ◽  
Content Type ◽  
Powder Bed

Purpose For the laser powder bed fusion (L-PBF) technology, the side surface quality is essentially important for industrial applicated parts, such as the inner flow parts. Contour is generally adopted at the parts’ outline to enhance the side surface quality. However, the side surface roughness (Ra) is still larger than 10 microns even with contour in previous studies. The purpose of this paper is to study the influence of contour process parameters, laser power and scanning velocity on the side surface quality of the AlSi10Mg sample. Design/methodology/approach Using L-PBF technology to manufacture AlSi10Mg samples under different contour process parameters, use a laser confocal microscope to capture the surface information of the samples, and obtain the surface roughness Ra and the maximum surface height Rz of each sample after analysis and processing. Findings The results show that the side surface roughness decreases with the increase of the laser power at the fixed scanning velocity of 1,000 mm/s, the side surface roughness Ra stays within the error range as the contour velocity increases. It is found that the Ra increases with the scanning velocity increasing and the greater the laser power with the greater Ra increases when the laser power of contour process parameters is 300 W, 350 W and 400 W. The Rz maintain growth with the contour scanning velocity increasing at constant laser power. The continuous uniform contour covers the pores in the molten pool of the sample edge and thus increase the density of the sample. Two mechanisms named “Active adhesion” and “Passive adhesion” cause sticky powder. Originality/value Formation of a uniform and even contour track is key to obtain the good side surface quality. The side surface quality is determined by the uniformity and stability of the contour track when the layer thickness is fixed. These research results can provide helpful guidance to improve the surface quality of L-PBF manufactured parts.

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