Effects of Process Parameters on Surface Finish in Cylindrical Grinding

2011 ◽  
Vol 264-265 ◽  
pp. 1118-1123
Author(s):  
Pradip Kumar Pal ◽  
Asish Bandyopadhyay ◽  
Ramesh Rudrapati
Keyword(s):  
Process Parameters ◽  
Surface Finish ◽  
Dimensional Accuracy ◽  
Grinding Wheel ◽  
Cylindrical Grinding ◽  
Good Surface ◽  
Grinding Parameters ◽  
Good Surface Finish ◽  
Full Factorial ◽  
Selection Of

Cylindrical grinding is an efficient and useful method of achieving good dimensional accuracy and fine finish. Very often one of the main objectives of grinding process is to obtain very good surface finish. The present investigation takes into account the effects of common grinding parameters on surface finish obtained in cylindrical grinding. The material selected is mild steel. The grinding wheel dimensions and its specification are kept in-varied. Grinding parameters like in-feed, longitudinal feed and work speed have been varied at several levels. Surface finish parameter (Ra) has been measured and noted for evaluation of surface finish, by using the instrument Talysurf. These data have been analyzed, interpreted and discussed in the context of varied conditions of cylindrical traverse cut grinding. Apart from identifying relationships between process parameters and surface finish through graphical presentations, a number of techniques (Full Factorial Design, Response Surface Methodology (RSM) and MATLAB) have been applied on the experimental data to arrive at some conclusive remarks. The paper effectively shows how selection of process parameters may yield desirable surface finish.

Vibration in Traverse Cut Cylindrical Grinding - Experiments and Analysis

2011 ◽  
Vol 264-265 ◽  
pp. 1124-1129 ◽  
Author(s):  
Ramesh Rudrapati ◽  
Pradip Kumar Pal ◽  
Asish Bandyopadhyay
Keyword(s):  
Process Parameters ◽  
Surface Finish ◽  
Dynamic Performance ◽  
Dimensional Accuracy ◽  
Vibration Signals ◽  
Cylindrical Grinding ◽  
Good Surface ◽  
Good Surface Finish ◽  
Grinding Machines ◽  
Grinding Machine

Good surface finish is one of the important demands from the outputs of a cylindrical grinding machine. Also it is expected that dimensional accuracy, including accuracy in roundness, is fine in traverse cut cylindrical grinding. Now, like any other machine tool, cylindrical grinding machines also do vibrate, and vibration will affect accuracy and surface finish of the parts produced in grinding. The analysis of vibration in cylindrical grinding is then very much important. In the present study some aspects of vibration – behavior of cylindrical grinding machine have been experimented and analyzed. The process parameters have been varied and vibration signals have been measured in different directions by positioning an accelerometer at tail stock of the machine. The data have been analyzed through various statistical techniques to identify and predict vibration at given combinations of process parameters. The results and analysis of data give useful idea about dynamic performance of cylindrical grinding machine in traverse cut cylindrical grinding operation.

Hybrid Non Conventional Machining of Glass - A Review

2019 ◽  
Vol 895 ◽  
pp. 8-14 ◽  
Author(s):  
Y. Nagaraj ◽  
N. Jagannatha ◽  
N. Sathisha
Keyword(s):  
Surface Finish ◽  
Machining Process ◽  
Machining Processes ◽  
Advantages And Disadvantages ◽  
Good Surface ◽  
Hard And Brittle Material ◽  
Good Surface Finish ◽  
Output Characteristics ◽  
Conventional Machining ◽  
Selection Of

Glass, being considered as hard and brittle material is very difficult to machine into desired shapes. The readily available conventional machining process does not provide good surface finish thus requires additional machining process. This paper reviews the different existing non conventional machining process accessible till today for the machining of glass materials. This paper also discusses the advantages and disadvantages of the existing non conventional machining processes. The various hybrid non conventional machining processes are also studied with focus on machining output characteristics like MRR, surface finish, tool wear rate. This paper summarizes the selection of hybrid non conventional machining processes for the various type of glass.

scholarly journals Optimization of parameters in cylindrical and surface grinding for improved surface finish

2018 ◽  
Vol 5 (5) ◽  
pp. 171906 ◽  
Author(s):  
Dinesh Kumar Patel ◽  
Deepam Goyal ◽  
B. S. Pabla
Keyword(s):  
Surface Roughness ◽  
Surface Integrity ◽  
Surface Finish ◽  
Surface Characteristics ◽  
Surface Grinding ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Cylindrical Grinding ◽  
Grinding Parameters ◽  
Wheel Material

Surface integrity has attracted the attention of researchers for improving the functional performance of engineering products. Improvement in surface finish, one of the important parameters in surface integrity, has been attempted by researchers through different processes. Grinding has been widely used for final machining of components requiring smooth surfaces coupled with precise tolerances. Proper selection of grinding wheel material and grade with grinding parameters can result in an improved surface finish and improved surface characteristics. The present work reports the study of the effect of grinding parameters on surface finish of EN8 steel. Experiments were performed on surface grinding and cylindrical grinding for optimization of grinding process parameters for improved surface finish. Grinding wheel speed, depth of cut, table feed, grinding wheel material and table travel speed for surface grinding operation, and work speed for cylindrical grinding operation were taken as the input parameters with four types of grinding wheels (Al 2 O 3 of grades K and L, and white alumina of grades J and K). The surface roughness was taken as an output parameter for experimentation. The grinding wheel material and grade have been observed to be the most significant variables for both cylindrical grinding and surface grinding. Surface roughness in the case of surface grinding is better compared to that of cylindrical grinding, which can be attributed to vibrations produced in the cylindrical grinding attachment. Surface roughness ( R a ) values of 0.757 µm in cylindrical grinding and 0.66 µm in surface grinding have been achieved.

Development of Three-Nozzle Extrusion System for Conformal Multi-Resolution 3D Printing With a Robotic Manipulator

2019 ◽  
Author(s):  
Yeo Jung Yoon ◽  
Minsok Yon ◽  
Sung Eun Jung ◽  
Satyandra K. Gupta
Keyword(s):  
3D Printing ◽  
Surface Finish ◽  
Dimensional Accuracy ◽  
Robotic Manipulator ◽  
3D Printer ◽  
System Calibration ◽  
Support Materials ◽  
Good Surface ◽  
Number Of Layers ◽  
Good Surface Finish

Abstract Using a 6-DOF robotic manipulator for material extrusion additive manufacturing (AM) enables conformal printing onto complex surfaces while orienting material fibers at desired directions. Compared to a traditional 3D printer, conformal printing can produce parts with good surface finish, less number of layers and enhanced mechanical properties. In this paper, we present a three-nozzle extrusion system which can be attached to a robot. This system allows the robot to achieve conformal 3D printing with multi-resolution. One extruder is for printing support materials and the other two extruders are for fabricating structural material with different resolutions. The interior regions of the part are fabricated with a bigger diameter nozzle and the surface of the part is printed with a smaller diameter nozzle. This multi-resolution printing not only speeds up the build times but also produces the good surface finish. In previous work, we demonstrated multi-resolution 3D printing using two robots. The contributions of this paper are design and fabrication of a three-nozzle extrusion system, calibration process for the system, and its validation. The validation of the calibration was done by printing linear and circular patterns using different nozzles, and evaluating relative dimensional accuracy. This work will enable a single robot to perform multi-resolution conformal 3D printing.

Reinforcement and Cutting Tools Interaction during MMC Machining - A Review

2018 ◽  
Vol 22 ◽  
pp. 47-54 ◽  
Author(s):  
Mukesh Chaudhari ◽  
M. Senthil Kumar
Keyword(s):  
Tool Wear ◽  
Metal Matrix Composites ◽  
Process Parameters ◽  
Surface Finish ◽  
Metal Matrix ◽  
Cutting Tools ◽  
Tool Geometry ◽  
Matrix Composites ◽  
Good Surface ◽  
Aerospace Medical

Aluminum based metal matrix composites (AMMC) have found its applications in the automobile, aerospace, medical, and metal industries due to their superior mechanical properties. Fabricated Aluminum based metal matrix composites require machining to improve the surface finish and dimensional tolerance. Machining should be accomplished by good surface finish by consuming lowest energy and less tool wear. This paper reviews the machining of Aluminum based metal matrix composites to investigate the effect of process parameters such as tool geometry, tool wear, surface roughness, chip formation and also process parameters.

Experimental Study on Surface Integrity, Dimensional Accuracy, and Micro-Hardness in Thin-Wall Machining of Aluminum Alloy

2018 ◽  
Vol 5 (2) ◽  
pp. 13-31
Author(s):  
Gururaj Bolar ◽  
Shrikrishna N. Joshi
Keyword(s):  
Aluminum Alloy ◽  
Process Parameters ◽  
Surface Finish ◽  
Dimensional Accuracy ◽  
Depth Of Cut ◽  
Thin Wall ◽  
Micro Hardness ◽  
Wall Deflection ◽  
High Feed ◽  
Axial Depth

This article presents an experimental investigation into the influence of process parameters viz. feed per tooth, axial depth of cut on milling force, surface finish, wall deflection and micro-hardness during thin-wall machining of an aerospace grade aluminum alloy 2024-T351. Results revealed that the process parameters significantly influence the surface finish and dimensional accuracy of machined thin-walls. High feed rate promoted the formation of built-up-edge (BUE). Combination of high feed and axial depth of cut aided in catastrophic failure of tools. Surface damages such as material plucking, material shearing, material adhesion and deformed feed mark layer formation were observed. Axial depth of cut negatively influenced the wall deflection leading to loss of dimensional accuracy. Interestingly, the micro-hardness at the machined surface was found to be lower than that of the bulk material hardness. These results will be useful in selection of suitable process parameters for quality and precise machining of thin-wall parts.

An Experimental Investigation of the Laser Milling Process for Polycrystalline Diamonds

2011 ◽  
Vol 291-294 ◽  
pp. 810-815 ◽  
Author(s):  
Qi Wu ◽  
Jun Wang
Keyword(s):  
Surface Roughness ◽  
Surface Finish ◽  
Polycrystalline Diamond ◽  
Milling Process ◽  
Depth Of Cut ◽  
Good Surface ◽  
Laser Milling ◽  
Cavity Profile ◽  
Profile Depth ◽  
Good Surface Finish

An experimental study of the pulsed laser milling process for a sintered polycrystalline diamond is presented. The characteristics and quality of the cavities machined with a Yd laser under different pulse energies, pulse overlaps, scan overlaps and numbers of passes are discussed, together with the effects of these parameters on the cavity profile, depth of cut and surface roughness. A statistical analysis is also presented to study the relationship between the process parameters and surface roughness. It shows that the optimum pulse overlap and pulse energy may be used to achieve good surface finish, whereas scan overlap and number of passes can be selected to improve the depth of cut without much effect on the surface finish.

Experimental Investigations on Machining Micro Alloy Steel (MAS 38MnSiVS5) Using K 20 Multi Coated Carbide Insert

2014 ◽  
Vol 591 ◽  
pp. 15-18
Author(s):  
Subramani Muniraj ◽  
Nambi Muthukrishnan
Keyword(s):  
Alloy Steel ◽  
Surface Finish ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Experimental Investigations ◽  
Good Surface ◽  
Good Surface Finish ◽  
Coated Carbide ◽  
Carbide Insert ◽  
Spindle Power

An experimental investigation is carried out on machining Micro Alloy Steel (MAS). The cylindrical rods of diameter 60 mm and length 250 mm is machined using the medium duty lathe of 2 kW spindle power to study the machinability issues of MAS using K20 multi coated (TiN-TiCN-Al203-ZrCN) Carbide insert. The optimum cutting parameters have been identified by power consumed by main spindle, and average surface roughness of machined component. Results show at higher cutting speeds; good surface finish is obtained. It is concluded that, surface finish is directly proportionate to the cutting speed. Results provide some useful information.

Development of Rapid Tooling for Investment Casting Using Fused Deposition Modeling Process

2014 ◽  
Vol 970 ◽  
pp. 155-165 ◽  
Author(s):  
Sambasiva Rao Addanki ◽  
Medha A. Dharap ◽  
Jonnalagedda V.L. Venkatesh
Keyword(s):  
Surface Finish ◽  
Chemical Treatment ◽  
Fused Deposition Modeling ◽  
Processing Technique ◽  
Rapid Tooling ◽  
Parent Material ◽  
Fused Deposition ◽  
Good Surface ◽  
Deposition Modeling ◽  
Good Surface Finish

Fused Deposition Modeling (FDM) process can be used to produce the rapid tooling directly or indirectly. However, rapid tooling application demands good surface finish since the poor surface finish of FDM parts has become a limitation for its tool application. So there is need to improve the surface finish of FDM made tools. In this study, surface roughness of FDM tools are drastically reduced by a post processing technique called chemical treatment process. Surface finish was improved by filling the gap between layers by diffusion of parent material. Thus FDM made tools can be used as direct as well as indirect tools after the chemical treatment. Comparative study was made between Silicon Rubber Moulding and FDM Tooling towards the cost, time, life of mould, quality and feasibility aspects. It was found that FDM tooling is more economical, easy to use, reduced cycle time, improved quality, long life of mould and more feasibility towards complex parts etc.

Performance and Analysis of Silicon Mixed Kerosene Servotherm in EDM of Monel 400

2015 ◽  
Vol 766-767 ◽  
pp. 674-680
Author(s):  
P. Karunakaran ◽  
J. Arun ◽  
V. Palanisamy ◽  
N.R.R. Anbusagar ◽  
P. Sengottuvel
Keyword(s):  
Surface Finish ◽  
Material Removal ◽  
Removal Rate ◽  
Silicon Powder ◽  
Graphite Powder ◽  
Dielectric Medium ◽  
Tool Wear Rate ◽  
Good Surface ◽  
Good Surface Finish ◽  
Monel 400

Improving the Material Removal Rate (MRR), reduce Tool Wear Rate (TWR), achieve the good Surface Finish (SF) and Over Cut (OC) are very demanding in Electrical Discharging Machining (EDM). This paper focused on performance of Silicon powder mixed with kerosene servotherm dielectric medium in EDM of Monel 400. The optimum range of Silicon powder, Graphite powder 6g mixes with the dielectric medium of kerosene servotherm (75:25) were developed experimentally. It was reported slightly more MRR, very low TWR, better OC and good surface finish (SF) in Monel 400.

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