Machined Surface Roughness Geometry Model Development on Ultrasonic Vibration Assisted Micromilling with End Mill

2020 ◽  
Vol 846 ◽  
pp. 122-127
Author(s):  
Gandjar Kiswanto ◽  
Yolanda Rudy Johan ◽  
Poly ◽  
Tae Jo Ko
Keyword(s):  
Surface Roughness ◽  
Ultrasonic Vibration ◽  
Cutting Tool ◽  
Model Development ◽  
Cutting Edge ◽  
End Mill ◽  
Machined Surface ◽  
Workpiece Surface ◽  
Geometry Model ◽  
Machined Surface Roughness

Micro products or micro components are commonly used in today’s world. Research around micromanufacture technologies to produce a better product quality has been going on extensively. Ultrasonic vibration assisted micromilling (UVAM) is one of the technologies that can give a better machining qualities over the conventional ones. One of the benefits UVAM can give is reducing the machined surface roughness. The purpose of this paper is to give an idea how vibration assisted micromilling can give a better surface roughness quality. The theoritical surface roughness geometry model is made using MATLAB software. The cutting tool used in the simulation is end mill. There is a feature of the cutting tool called bottom cutting edge angle. This feature will be considered on this paper. The effects of the bottom cutting edge on workpiece machined surface can be looked visually from the simulation. Thus, the effects of cutting process using UVAM on the workpiece surface can be looked as well through the simulation.

Theoretical Value of Total Height of Profile in Rotational Turning

2013 ◽  
Vol 309 ◽  
pp. 154-161 ◽  
Author(s):  
István Sztankovics ◽  
János Kundrák
Keyword(s):  
Surface Roughness ◽  
Cutting Tool ◽  
Cutting Edge ◽  
Technological Parameters ◽  
Machined Surface ◽  
Total Height ◽  
Roughness Profile ◽  
Rotational Turning ◽  
Longitudinal Turning ◽  
Chip Removal

The roughness of the machined surface is determined by the kinematics of chip removal, the shaping and the geometry of the cutting edge. The change of the surface roughness in cutting done under different conditions is easy to follow examining the theoretical value of roughness characteristics. This paper examines how the extent of the theoretical value of total height of profile depends on the different technological parameters in rotational turning. Furthermore the surface roughness and roughness profile is compared achievable by rotational turning and traditional longitudinal turning (in case of radius and pointed cutting tool).

The Influence of Cutting Conditions on Surface Roughness during Steel 100Cr6 Grinding

2017 ◽  
Vol 261 ◽  
pp. 215-220
Author(s):  
Martin Novák ◽  
Natasa Naprstkova
Keyword(s):  
Surface Roughness ◽  
Bearing Steel ◽  
Cutting Conditions ◽  
Machining Process ◽  
Machined Surface ◽  
Workpiece Surface ◽  
Bearing Steels ◽  
Technology Products ◽  
Machined Surface Roughness

Machining of tool steels is often an important used technology. Products made from these materials are often used in mechanical engineering, and quality of workpiece surface roughness after machining respective grinding is one of the important parameters that to us speak about the quality of the machining process. The paper deals with the influence of cutting conditions when grinding bearing steel 100Cr (EN ISO) on machined surface roughness. This steel belongs to a group of bearing steels.

The Effect of the Cutting Parameters on the Machined Surface Roughness

2017 ◽  
Vol 260 ◽  
pp. 219-226 ◽  
Author(s):  
Viktors Gutakovskis ◽  
Eriks Gerins ◽  
Janis Rudzitis ◽  
Artis Kromanis
Keyword(s):  
Surface Roughness ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Cutting Parameters ◽  
Cutting Process ◽  
Tool Geometry ◽  
Machining Parameters ◽  
Machined Surface ◽  
Machined Surface Roughness

From the invention of turning machine or lathe, some engineers are trying to increase the turning productivity. The increase of productivity is following after the breakout in instrumental area, such as the hard alloy instrument and resistance to wear cutting surfaces. The potential of cutting speed has a certain limit. New steel marks and cutting surfaces types allow significantly increase cutting and turning speeds. For the most operation types the productivity increase begins from the feeding increase. But the increase of feeding goes together with machined surface result decreasement. Metal cutting with high feeding is one of the most actual problems in the increasing of manufacturing volume but there are some problems one of them is the cutting forces increasement and larger metal removal rate, which decrease the cutting tool life significantly. Increasing of manufacturing volume, going together with the cutting instrument technology and material evolution, such as the invention of the carbide cutting materials and wear resistant coatings such as TiC and Ti(C,N). Each of these coating have its own properties and functions in the metal cutting process. Together with this evolution the cutting tool geometry and machining parameters dependencies are researched. Traditionally for the decreasing the machining time of one part, the cutting parameters were increased, decreasing by this way the machining operation quantity. In our days the wear resistance of the cutting tools increasing and it is mostly used one or two machining operations (medium and fine finishing). The purpose of the topic is to represent the experimental results of the stainless steel turning process, using increased cutting speeds and feeding values, to develop advanced processing technology, using new modern coated cutting tools by CVD and PVD methods. After investigation of the machined surface roughness results, develop the mathematical model of the cutting process using higher values of the cutting parameters.

The Influence of Cutting Conditions on Surface Roughness during Steel X38CrMoV5 Grinding

2013 ◽  
Vol 581 ◽  
pp. 247-254 ◽  
Author(s):  
Martin Novák ◽  
Natasa Naprstkova
Keyword(s):  
Surface Roughness ◽  
Cutting Conditions ◽  
Machining Process ◽  
Tool Steels ◽  
Machined Surface ◽  
Workpiece Surface ◽  
Technology Products ◽  
Machined Surface Roughness ◽  
Grinding Tool

Machining of tool steels is often an important used technology. Products made from these materials are often used in mechanical engineering, and quality of workpiece surface roughness after machining respective grinding is one of the important parameters that to us speak about the quality of the machining process. The paper deals with the influence of cutting conditions when grinding tool steel X38CrMoV5 (EN ISO) on machined surface roughness.

Surface Roughness Characteristics of Polyamide APA after the Turning by Unconventional Cutting Tool

2013 ◽  
Vol 702 ◽  
pp. 263-268 ◽  
Author(s):  
Katarina Monkova
Keyword(s):  
Surface Roughness ◽  
Cutting Tool ◽  
Statistical Data ◽  
Cutting Speed ◽  
Cutting Edge ◽  
Automotive Applications ◽  
Machined Surface ◽  
Total Cost ◽  
Lower Volume ◽  
Structural Parts

The article deals with surface roughness characteristics of polyamide APA after the turning by tool with linear cutting edge. The experiment was centred on the obtaining of Ra and Rz dependences on both cutting speed and feed per revolution concurrently. Polyamide APA allows the production of very large structural and semi-structural parts for automotive and non-automotive applications including interior, exterior and under-the-hood applications. It also allows reducing the total cost of production, especially for lower volume parts. Therefore, the authors deals with the possibility to work this material. The special cutting tool was selected in regard to the author´s previous experiments. The surfaces of investigated metal samples, which were machined by the tool with linear cutting edge, achieved very good properties, so it was the reason for the using of this tool at the experiments presented in the article. Obtained values of surface roughness characteristics were worked up by means of regression analysis and according to the rules for statistical data processing. The results are arranged into the table and consequently into the graphical presentations. The shapes of chips at the machining within various working conditions are shown at the end of the article. Next experiments will be focused on the machining of other types materials with the same unconventional cutting tool and for the obtaining new data that characterize the machined surface.

Investigation on Machined Surface Roughness in Ultrasonic Vibration Assisted Grinding (I)

2011 ◽  
Vol 230-232 ◽  
pp. 829-833
Author(s):  
Hong Li Zhang ◽  
Shao Fu Shan ◽  
Jian Hua Zhang
Keyword(s):  
Surface Roughness ◽  
Surface Morphology ◽  
Ultrasonic Vibration ◽  
Machined Surface ◽  
Conventional Grinding ◽  
Machined Surface Roughness ◽  
Ultrasonic Vibration Assisted Grinding ◽  
Abrasive Size ◽  
Calculating Model

Based on the generating mechanism of surface morphology by tangential ultrasonic vibration assisted grinding (TUAG), the calculating model for surface roughness is established and the surface roughness experiments are conducted both in TUAG and conventional grinding (CG). The results indicate that the effect of the grinding abrasive size on the surface roughness is the most obvious, and the surface roughness is decreased due to the tangential ultrasonic vibration.

scholarly journals Study on Surface Roughness of Gcr15 Machined by Micro-Texture PCBN Tools

Machines ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 42 ◽  
Author(s):  
Chen Pan ◽  
Qinghua Li ◽  
Kaixing Hu ◽  
Yuxin Jiao ◽  
Yumei Song
Keyword(s):  
Surface Roughness ◽  
Cubic Boron Nitride ◽  
Bearing Steel ◽  
Cutting Edge ◽  
Machined Surface ◽  
Machined Surface Roughness ◽  
Influence Degree ◽  
Pcbn Tools ◽  
Cutting Speeds

This paper applies micro textures to the rake face of PCBN (Polycrystalline Cubic Boron Nitride) tools, including three types of micro textures that are microgroove textures vertical to the cutting edge, microgroove textures parallel to the cutting edge, and microhole textures. In this paper, the effects of different cutting speeds on the surface quality of hardened bearing steel GCr15 by dry turning with non-texture PCBN tools and micro-texture PCBN tools are studied, and the surface roughness values obtained by different micro textures were compared and analyzed. The results showed that, compared to that of non-texture tools, the influence degree of the micro-texture tools on the machined surface roughness was different. The microhole texture and vertical microgroove texture were able to effectively reduce the surface roughness of the workpiece, and microhole texture had the best effective influence on surface roughness, but the parallel microgroove texture increased surface roughness. The influence of cutting speeds on surface roughness was different due to different types of micro textures. The influence of micro textures on surface roughness has huge potential for tool applications.

Metal Turning Mechanical Model of Machined Surface Roughness

2015 ◽  
Vol 1095 ◽  
pp. 770-772 ◽  
Author(s):  
Quan Li ◽  
Man Chen Xiong ◽  
Yin Yin Liu
Keyword(s):  
Surface Roughness ◽  
Mechanical Model ◽  
Chip Thickness ◽  
Cutting Edge ◽  
Machined Surface ◽  
Undeformed Chip Thickness ◽  
Machined Surface Roughness

Consider the mechanism of the formation of surface roughness, this paper establish the mechanical model of undeformed chip thickness caused by the cutting edge,and the mechanical model of cutting residues caused by the tool feed movement . By means of Brammertz equation, combining the above two mechanical model,a more perfect surface roughness mechanical mode is established.

Critical Feed/Tooth Value Providing Finest Machined Roughness by Peripheral Cutting with Micro Endmills

2016 ◽  
Vol 874 ◽  
pp. 232-237
Author(s):  
Yasunori Kobayashi ◽  
Haruhisa Sakamoto ◽  
Akihito Ishii ◽  
Masayori Itoh
Keyword(s):  
Surface Roughness ◽  
Chip Thickness ◽  
Machined Surface ◽  
Workpiece Surface ◽  
Machining Conditions ◽  
Machined Surface Roughness ◽  
Tool Diameter ◽  
Cutting Speeds ◽  
Machined Surfaces

This study concerns the rational determination of machining conditions for micro endmills that are less than 1.0mm in diameter. The characteristics of machined surface roughness are measured according to machining conditions, especially the feed per tooth Sz. The machined surfaces conditions are also observed with SEM. From the experiments, the following are made clear: (1) The feed per tooth Sz at the critical value Szc makes machined surface roughness the finest. (2) The conditions of Sz larger than Szc make cutting marks regular, that is, stable cutting can be done under those conditions, and then, the roughness improves according to decreasing Sz. (3) The conditions of Sz smaller than Szc cause irregular machined surfaces including pileups and diggings, that is, cutting becomes unstable conditions. The excessively thin chip-thickness prevents from stably engaging edge on workpiece surface. (4) Although the values of Szc are independent from the type of machine tools and cutting speeds, the values decrease according to decrease in tool diameter. (5) The value of Szc increases when tool has worn over its limit. Therefore, in order to determine machining conditions rationally, the changing behavior of Szc should be understood according to tool wear.

Some Aspects of Improving Integrity of Machined Surfaces on Al/SiCp Metal Matrix Composites

2010 ◽  
Vol 443 ◽  
pp. 596-601 ◽  
Author(s):  
Uday A. Dabade ◽  
Suhas S. Joshi
Keyword(s):  
Surface Roughness ◽  
Residual Stresses ◽  
Surface Integrity ◽  
Experimental Work ◽  
Metal Matrix ◽  
Cutting Tool ◽  
Matrix Composites ◽  
Machined Surface ◽  
Machined Surface Roughness ◽  
Machined Surfaces

This paper presents findings of an experimental work which involved use of wiping edge on the cutting tool and a priory heating of the work surfaces to improve the integrity of machined surfaces. The wiper edge cleans the machined surface and a priory heating induces necessary local ductility into the machined surface to promote improvement in the surface integrity. The result shows that the wiper inserts reduce surface roughness (by about 38%); cutting forces (by about 8%) and induce compressive (or lower tensile) residual stresses in the machined surfaces, hence help to improve the surface integrity. Similarly, a priory heating of work surfaces at 70°C was also found to improve machined surface roughness considerably.

Sign in / Sign up

Export Citation Format

Share Document