Study on Wall Heights and Surface Roughness of Spun Cups Produced of Metal Blanks by Multipass CNC Spinning Technology

2019 ◽  
Vol 952 ◽  
pp. 55-65
Author(s):  
Martin Frnčík ◽  
Jana Šugárová ◽  
Peter Šugár ◽  
Ingrid Görögová ◽  
Martin Sahul
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Experimental Research ◽  
Surface Finish ◽  
Design Of Experiment ◽  
Rotational Speed ◽  
Tool Path ◽  
Rolling Direction ◽  
Metal Spinning ◽  
Full Factorial

This research paper deals with the influence analysis of the conventional metal spinning parameters (tool path profile tpp, tool feed f and mandrel rotational speed n) on the wall heights and the surface roughness Ra of the cylindrical-shaped spun parts measured in various directions with respect to the material rolling direction. Experimental research was carried out according to the 3-level full factorial design of experiment (DoE). Experimental study was also statistically analyzed by the ANOVA method. It was observed that tool path profile is a process parameter which has the most significant impact on the spun cup height and the surface finish, as well.

Surface Roughness Analysis of Metal Spun Parts

2013 ◽  
Vol 652-654 ◽  
pp. 2006-2009 ◽  
Author(s):  
Peter Šugár ◽  
Jana Šugárová ◽  
Ján Petrovič
Keyword(s):  
Surface Roughness ◽  
Surface Finish ◽  
Rolling Direction ◽  
Spindle Speed ◽  
Anova Analysis ◽  
Planar Anisotropy ◽  
Sheet Rolling ◽  
Roughness Analysis ◽  
Metal Spinning ◽  
Formed Part

The paper brings the results of roughness analysis of formed part produced by CNC multi-pass conventional metal spinning. The influence of the spindle speed, workpiece geometry and planar anisotropy of the blank on the formed part roughness was studied. For experiment design, an orthogonal array L27(313) was used and ANOVA (Analysis of Variance) was carried out. Based on the results it is determined that the higher spindle speed leads to rough surface finish. The surface roughness measured in different areas of experimental samples (corner R10, conical area, cylindrical area) indicates that the worst surface finish is in the conical area. Roughness in different directions refer to the sheet rolling direction shows minimal differences.

Experimental Study on Numerical Controlled Electrochemical Turning

2010 ◽  
Vol 426-427 ◽  
pp. 658-663 ◽  
Author(s):  
Min Kang ◽  
X.Q. Fu ◽  
Yong Yang
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Flow Field ◽  
Rotational Speed ◽  
Cylindrical Surface ◽  
Special Kind ◽  
Machining Process ◽  
Experimental Setup ◽  
Electrolyte Flow ◽  
Electrochemical Turning

In order to machine revolving workpieces which are made of difficult-to-cut materials or have low rigidity, the technology of Numerical Controlled Electrochemical Turning (NC-ECT) was put forward and the preliminary experimental study was presented in this paper. To carry out the study, an experimental setup was developed, and a new special kind of inner-spraying cathode with single linear edge was designed according to the process of machining cylindrical surface and the requirement of stable electrolyte flow field. First, the NC-ECT method was simply described. Then, considering the structure of the cathode and the machining process, the method for calculating the material removed depth per revolution in machining the cylindrical surface was given. Finally, the experiments of machining the cylindrical surface were carried out. Experiments showed: 1) The calculated material removed depth per revolution is well consistent with the actual value of the machining process, which decreases with the increase of the rotational speed of the workpiece and increases almost linearly with the increase of the working voltage; 2) The surface roughness decreases with the increase of the rotational speed of the workpiece and the working voltage; 3) The working current in the machining process trend to stable after several revolutions.

Interaction Relationship Analysis of Surface Roughness on Aluminium Etched Wafer Using RIE

2014 ◽  
Vol 487 ◽  
pp. 214-217
Author(s):  
Zaliman Sauli ◽  
Vithyacharan Retnasamy ◽  
Aaron Koay Terr Yeow ◽  
Ng Wei Wei
Keyword(s):  
Surface Roughness ◽  
Factorial Design ◽  
Design Of Experiment ◽  
Reactive Ion Etching ◽  
Full Factorial Design ◽  
Strong Interactions ◽  
Rf Power ◽  
Ion Etching ◽  
Relationship Analysis ◽  
Full Factorial

This paper presents the interaction relationships between Tetrafluoromethane (CF4) gas, Oxygen (O2) gas, and RF power in response to the surface roughness of an Aluminium deposited wafer after being etched using Reactive Ion Etching (RIE). The investigation was done using the three factors full factorial design of experiment (DOE). Analysis was done qualitatively by plotting the main interaction plots. The results suggest that strong interactions are present between CF4 and RF power, CF4 and O2, and also O2 and RF power due to the intersection of the graphs. This implies that all three factors have interaction between each other towards the surface roughness on the deposited Aluminium after RIE.

Design of Surface Finish Using Synchronous Process of Grinding and Electrochemical Finishing

2007 ◽  
Vol 359-360 ◽  
pp. 259-263
Author(s):  
Pai Shan Pa
Keyword(s):  
Surface Roughness ◽  
Flow Rate ◽  
Surface Finish ◽  
Feed Rate ◽  
Rotational Speed ◽  
Machining Process ◽  
Grinding Wheel ◽  
High Rotational Speed ◽  
Plate Electrode ◽  
Electrochemical Finishing

In order to elevate the efficiency of the surface finish to reach the fast improvement of the surface roughness of the workpiece, so as to reduce the residual stress on the surface efficiently. The present study discusses the surface after traditional machining, of which the plane surface used a design of finish tool includes an electrode and a nonconductive grinding wheel to execute the synchronous process of grinding and electrochemical finishing. The electrode form and the machining process are obviously different from electrochemical grinding (ECG). In the experiment, the design electrode is used with continuous and pulsed direct current. The controlled factors include die material, and chemical composition and concentration of the electrolyte. The experimental parameters are flow rate of electrolytes, position of plate electrode, electrode thickness, electrode rotational speed, electrical current rating, feed rate of workpiece, and pulsed period. The experimental results show that the supply of current rating is near concern with the position and thickness of the plate electrode. The use of large electrolytic flow rate and thick electrode is advantageous to the finish effect. High rotational speed of finish tool produces better polishing. The finishing effect is better with longer off-time because discharge of polishing dregs becomes easier. Higher current rating with quicker workpiece feed rate effectively reaches the fast improvement of the surface roughness of the workpiece is recommend in current study.

Effect of Surface Treatment and Cutting Orientation to the Changes in Stents Surface Roughness

2020 ◽  
Vol 867 ◽  
pp. 125-133
Author(s):  
Achmad Syaifudin ◽  
Julendra Bambang Ariatedja ◽  
Katsuhiko Sasaki
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Plastic Deformation ◽  
Surface Treatment ◽  
Rolling Direction ◽  
Raw Material ◽  
Surface Polishing ◽  
Longitudinal Orientation ◽  
Shape Changes ◽  
Effect Of Surface

During the implantation process, an expandable balloon stent undergoes a change in mesh shape with a high strain rate. Permanent mesh shape changes to the stents indicate plastic deformation has occurred. On a micro-scale, plastic deformation has significant influence when interacting with the soft tissue of human blood vessels. This experimental study aims to investigate the effect of surface treatment and cutting orientation on the changes in surface roughness that definitely occurs when a stent deployed. To study the effect of surface treatment, two types of surface treatment were applied after surface polishing, i.e. etching and electropolishing. Surface polishing is carried out to enable microscopic observation. As for examining the effect of cutting orientation, the plate is cut in lateral and longitudinal orientation against the predicted-rolling direction of 316L sheet-type of stainless steel. An intermittent tensile test is conducted to obtain information about the changes in surface roughness. The surface observation is carried out three times on a similar surface of testpiece after reaching plastic deformation. The experimental study shows that the orientation of raw material has an insignificant effect on the changes in stent surface roughness. As for the surface treatments, electropolishing tended to decrease the tensile property of material.

Analysis of the Surface Roughness of a Tube Drawn by a Fixed Mandrel

2020 ◽  
Vol 994 ◽  
pp. 70-77 ◽  
Author(s):  
Augustín Görög ◽  
Ingrid Görögová ◽  
Maroš Martinkovič
Keyword(s):  
Surface Roughness ◽  
Experimental Research ◽  
Surface Finish ◽  
Small Diameter ◽  
Internal Diameter ◽  
Tube Drawing ◽  
Inner Surface ◽  
Spiral Grooves ◽  
Drawing Method

The manufacture of tubes by a fixed mandrel drawing is one of the technologies in the manufacture of seamless tubes. This is the oldest tube drawing method. It uses a mandrel at the end of the die to shape the internal diameter of the tube. This process is slow and the area reductions are limited (lengths of tubes are limited), but it gives the best inner surface finish of any of the processes. The use of a fixed mandrel by the drawing of small-diameter tubes makes it possible to increase the accuracy of the inner surface and improve the quality. The paper presents the results of solving a partial task in this area. It deals with the reconstruction of the microgeometry of the inner surface of a tube drawn by a fixed mandrel. Tubes (STN 41 1353) were drawn through dies with different reduction angles. There were grounds the straight and spiral grooves on used fixed mandrels. On the inner surface of the tube were formed grooves after drawn that had a different surface roughness compared to the mandrel surface. The paper graphically presents the morphology of obtained surfaces under various conditions (reduction angles, straight/spiral grooves on the fixed mandrel) as well as measured surface roughness values. At the end of the paper, the knowledge gained through experimental research are summarized.

Wettability and Surface Roughness Study on RIE Treated Aluminium Deposited Surface

2014 ◽  
Vol 925 ◽  
pp. 101-104
Author(s):  
Vithyacharan Retnasamy ◽  
Zaliman Sauli ◽  
Uda Hashim ◽  
Moganraj Palianysamy ◽  
Aaron Koay Terr Yeow ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Contact Angle ◽  
Factorial Design ◽  
Process Parameters ◽  
Design Of Experiment ◽  
Etch Rate ◽  
Contact Angles ◽  
Atomic Force ◽  
Roughness Analysis ◽  
Full Factorial

Design of Experiment (DOE) is a technique for optimizing process which has controllable inputs and measurable outputs. As a method of DOE, 24 Full Factorial design is used to study the effect of Reactive Ion Etch towards the surface roughness of aluminum pad and effect of the roughness produced towards the contact angle. Surface roughness analysis is done using Atomic Force Microscop (AFM). Contact angle is measured using AutoCad software from the images captured from droplet test. This contact angles must be more than 90° for non-wetting profile or less than 90° for wetting profile. This work is also done to understand the interaction between the process parameters and how each parameters will affect the etch rate. The results are analyzed which shows that the increase in surface roughness produces an increase on the contact angle and vice versa.

Experimental Research on Machining Process for Convex Curved Rake Face of Pinion Cutter

2011 ◽  
Vol 80-81 ◽  
pp. 495-500 ◽  
Author(s):  
Xue Guang Li ◽  
Guo Quan Shi ◽  
Shu Ren Zhang ◽  
Lin Sen Song
Keyword(s):  
Surface Roughness ◽  
Experimental Research ◽  
Tool Path ◽  
Cnc Machining ◽  
Machining Process ◽  
Grinding Wheel ◽  
Laser Sensor ◽  
Rake Face ◽  
Initial Location ◽  
The Ideal

According to the new profiling characteristic of carbide pinion cutter with convex curved rake face, the machining process of convex curved rake face is designed, the special grinding equipment is designed and developed. Tool presetting and detecting equipment is developed by using laser sensor. It can be used to locate the initial location of grinding wheel precisely when convex curved rake face is machining. The tool path for CNC machining is solved. The grinding experiment is done for convex curved rake face of pinion cutter with 21teeth and 5modulus , different process parameters are established. The ideal surface roughness is obtained. The experiment result shows that the grinding equipment and tool presetting equipment are proper for machining requirements of convex curved rake face of pinion cutter.

Uncertainty analysis of multijet modelling processes for rapid prototyping of parts

2002 ◽  
Vol 216 (5) ◽  
pp. 743-752 ◽  
Author(s):  
C J Luis Pérez ◽  
J Vivancos Calvet
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Rapid Prototyping ◽  
Surface Finish ◽  
Manufacturing Processes ◽  
Average Surface Roughness ◽  
Average Surface ◽  
Dimensional Precision ◽  
Effective Roughness ◽  
Manufacturing Parameters

The present study focuses on aspects of the surface qualities of prototypes obtained by multijet modelling (MJM) techniques. The surface finish and dimensional precision of parts obtained through these manufacturing processes are often highly important, especially in those cases where the manufactured prototypes are used as functional parts, as in the case of lost wax casting. Moreover, it is important to obtain an estimate of the average surface roughness in order to select the appropriate manufacturing parameters. Although there are many different techniques for evaluating surface roughness, one of the most commonly employed methods involves the assessment of the average surface roughness by means of stylus instruments. Prototypes were manufactured using two different MJM systems under different conditions for each prototype. After the parts were obtained, an experimental study of effective roughness was carried out. A comparative study using the same MJM systems with different accuracies was also performed in order to evaluate the capability of these rapid prototyping techniques to manufacture parts.

scholarly journals Selection of Parameters and Strategies to Reduce Energy Consumption and Improve Surface Quality in EN-AW 7075 Molds Machining

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 688 ◽  
Author(s):  
Oscar Rodriguez-Alabanda ◽  
Maria Bonilla ◽  
Guillermo Guerrero-Vaca ◽  
Pablo Romero
Keyword(s):  
Surface Roughness ◽  
Energy Consumption ◽  
Surface Finish ◽  
Tool Path ◽  
Orthogonal Design ◽  
Electrical Energy ◽  
Cutting Parameters ◽  
Influential Factor ◽  
Depth Of Cut ◽  
Selection Of

The machining of cavities for blow molding is a long and costly process, with the objective of obtaining an excellent surface finish with the minimal possible electrical energy consumption (EEC). This work has studied which combination of cutting parameters and cutting strategies to use to achieve an optimum surface finish on the mold using the minimal associated EEC: in roughing operation, tool path strategy and axial depth of cut were studied; in finishing operation, tool path strategy, spindle-speed, feed-rate, and step-over were evaluated. Thirty-two molds were machined in blocks of aluminium alloy EN-AW 7075 T6 in a machining center of a three-axis, following an orthogonal design of experiments. The analysis of results demonstrates that: a roughing strategy has influence on the surface roughness on the bottom of the mold; a finishing strategy is an influential factor on the surface roughness on the walls of the mold; certain parameters have no relevance on the surface roughness but have an influence on the EEC; an adequate selection of cutting strategies and cutting parameters permit an improvement of surface roughness of up to 70%, and a reduction of 40% in EEC, compared to the less favorable tests.

Sign in / Sign up

Export Citation Format

Share Document