Cutting Features Between Surface Roughness in Feed Direction and Machining State of Radius End Mill Against Inclined Surfaces (In Case of Contour Machining and Five-Axis Machining with Constant Tilt Angle)

2020 ◽  
Vol 14 (1) ◽  
pp. 46-51
Author(s):  
Hirohisa Narita ◽  
Keyword(s):  
Surface Roughness ◽  
Taguchi Method ◽  
End Mill ◽  
Experimental Conditions ◽  
Good Surface ◽  
Feed Direction ◽  
Inclined Surfaces ◽  
Unique Shape ◽  
Good Surface Roughness ◽  
Five Axis

Optimum experimental conditions, that realize good surface roughness in feed direction, for a radius end mill against some inclined surfaces is obtained by the Taguchi method. Some cutting features due to the unique shape of the radius end mill are revealed via the degree of influence of various factors, which are calculated by the Taguchi method, and the geometric relationship of some contact states of the tool. The experimental conditions include cutting type, spindle speed, feed rate, depth of immersion, inclination angle, and corner radius. The results revealed that the contact states are highly significant, and can be categorized into three types. Furthermore, bottom and corner edges must be contacted simultaneously in order to obtain good surface roughness.

Surface Roughness Analysis for Radius End Mill in Cross Feed Direction Both Contour and Scanning Line Machinings

2020 ◽  
Author(s):  
Hirohisa Narita
Keyword(s):  
Surface Roughness ◽  
Inclination Angle ◽  
End Milling ◽  
Contour Line ◽  
End Mill ◽  
Good Surface ◽  
Corner Radius ◽  
Feed Direction ◽  
Scanning Line ◽  
Influence Degree

Abstract An optimum experimental condition, which realize good surface roughness in cross direction both contour and scanning lines, for radius end mill against some inclined surfaces is obtained and some features is these cutting processes is discussed in this paper. The optimum experimental condition, which consists of cutting type (or feed direction), spindle speed, feed rate, depth of immersion, inclination angle, corner radius of end mill and cross feed, is obtained and the influence degree of these parameters is calculated by using Taguchi method. The experiment is carried out based on L18 orthogonal array. Based on the influence degree and geometric contact status due to unique shape of radius end mill, some feature of radius end milling is introduced. As a result of the contour line machining, a scallop height is very influenced by the inclination angle and the corner radius, and surface machined by bottom edge must not be remained. Regarding the scanning line machining, “go-up” is good for the feed direction. Big corner radius is also suitable because side edge does not contact to workpiece. In other words, the cutting force in radial direction becomes small. Furthermore, the surface roughness of the scanning line machining is smaller than the one of the contour line machining.

scholarly journals PENENTUAN PARAMETER PROSES PEMBUBUTAN TERHADAP KEKASARAN PERMUKAAN MATERIAL ST 42 DENGAN METODE TAGUCHI

JTAM ROTARY ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. 183
Author(s):  
Ismail Mansyursyah ◽  
Mastiadi Tamjidillah
Keyword(s):  
Surface Roughness ◽  
Taguchi Method ◽  
Machining Process ◽  
Good Surface ◽  
Steel Material ◽  
Good Surface Roughness

Penelitian ini bertujuan untuk mengetahui parameter apa saja yang berpengaruh terhadap kekasaran permukaan pada proses permesinan bubut konvensional dengan material ST 42 dan mengetahui parameter apa saja yang menghasilkan kekasaran permukaan yang baik dengan menggunakan metode Taguchi. Berdasarkan dari penelitian yang telah dilakukan maka diketahui tidak ada parameter yang berpengaruh terhadap kekasaran permukaan material baja ST 42. Parameter yang menghasilkan kekasaran permukaan material baja ST 42 yang paling baik adalah jenis mata pahat JCK dengan feeding 0,115 dan kehalusan 3,42 µm. This study aims to determine which parameters affect the surface roughness of the conventional lathe machining process with ST 42 material and to find out which parameters produce good surface roughness using the Taguchi method. Based on the research that has been done, it is known that there are no parameters that affect the surface roughness of the ST 42 steel material. The parameter that produces the best surface roughness of ST 42 steel material is the type of JCK tool blade with a feeding of 0.115 and a smoothness of 3.42 µm.

scholarly journals Analysis of Surface Roughness Value When Drilling Magnesiumaz31 Using Taghuci Method

INSIST ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 71
Author(s):  
Gusri Akhyar Ibrahim ◽  
Arinal Hamni ◽  
Sri Maria Puji Lestari
Keyword(s):  
Surface Roughness ◽  
Magnesium Alloy ◽  
Taguchi Method ◽  
Feed Rate ◽  
Workpiece Material ◽  
Machined Surface ◽  
Good Surface ◽  
Good Surface Roughness ◽  
Experimental Trials

Magnesium alloy is one of super alloys material which wide used in manufacturing of automotive, biomedic, sport and electronic components. It was due to very light and resistent to corrosion. Surface roughness value has an important role to estabilish the quality of components. To produce a good surface roughness of machined surface, one of the important thing depends on the friction between the cutting tool and workpiece material when cutting process occurred. The aim of this paper is to analyse the surface roughness values of machined surface when drilling of magnesium alloy AZ31 using design of experiment of Taguchi Method. The experimental trials took place at cutting rotation of 635, 970 and 1420 rpm, feed rate of 0.10, 0.18 and 0.24 mm/rev, diameter tool of 10, 12 and 14 mm. The cutting of magnesium alloy was done by using a convensional drilling machine with TCA –35Erlo. Analysis of variance on the data of surface roughness value was done to get which factor is the most significant. The result shows that the feed rate is the most significant factor that contributed on the surface rougness value of machined surface. The minimum surface roughness value was attained at cutting rotation of 970 rpm, feed rate of 0.10 mm/rev and diameter of tool of 14 mm. Therefore, it can be stated that selecting the low feed rate factor produced low surface roughness value. Another hand, using high cutting rotation resulted low surface roughness value.Keywords—drilling, surface roughness, magnesiun AZ31,Taguchi Method

scholarly journals Surface Roughness Models and Their Experimental Validation in Micro Milling of 6061-T6 Al Alloy by Response Surface Methodology

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Jie Yi ◽  
Li Jiao ◽  
Xibin Wang ◽  
Junfeng Xiang ◽  
Meixia Yuan ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Response Surface ◽  
Removal Rate ◽  
Micro Milling ◽  
Al Alloy ◽  
Machined Surface ◽  
Contour Map ◽  
Good Surface ◽  
Micro Features ◽  
Good Surface Roughness

Due to the widespread use of high-accuracy miniature and micro features or components, it is required to predict the machined surface performance of the micro milling processes. In this paper, a new predictive model of the surface roughness is established by response surface method (RSM) according to the micro milling experiment of 6061-T6 aluminum alloy which is carried out based on the central composite circumscribed (CCC) design. Then the model is used to analyze the effects of parameters on the surface roughness, and it can be concluded that the surface roughness increases with the increasing of the feed rate and the decreasing of the spindle speed. At last, based on the model the contour map of the surface roughness and material removal rate is established for optimizing the process parameters to improve the cutting efficiency with good surface roughness. The prediction results from the model have good agreement with the experimental results.

Surface Roughness in High Feed Turning with Wiper Insert

2008 ◽  
Vol 375-376 ◽  
pp. 406-410 ◽  
Author(s):  
Zhan Qiang Liu ◽  
Peng Zhang ◽  
Peng Guo ◽  
Xing Ai
Keyword(s):  
Surface Roughness ◽  
Feed Rate ◽  
Machined Surface ◽  
Good Surface ◽  
Corner Radius ◽  
Number Of Factors ◽  
Machined Surface Roughness ◽  
High Feed ◽  
Good Surface Roughness ◽  
Coated Carbide

Surface roughness in a turning operation is affected by a great number of factors. Two of the most important factors are feed rate and the size of the corner radius. Surface roughness can be roughly determined to increase with the square of the feed rate and decrease with increased size of the corner radius. However, wiper insert geometries changed this relationship with the capability to generate good surface roughness at relatively higher feeds by transferring small part of the round insert edges into the straight cutting edges of the pointed insert. The principle of how wiper inserts behave different from conventional inserts as to the effects on the surface roughness is explored in this paper. Experimental study of the surface roughness produced in the turning of hardened mild steels using coated carbide tools with both conventional and wiper inserts is conducted. The test results prove the effectiveness of the wiper inserts in providing excellent surface roughness. The results also suggest that the use of the wiper insert is an effective way that significantly increases cutting efficiency without changing the machined surface roughness in high feed turning operations.

Polishing Experiment Study of the Elastic Coated Abrasives

2014 ◽  
Vol 941-944 ◽  
pp. 1981-1984
Author(s):  
Gui Lian Wang ◽  
Hai Bo Zhou ◽  
Shu Li Guo ◽  
De Chen Huang ◽  
Ren Bao Jiao ◽  
...  
Keyword(s):  
Surface Roughness ◽  
High Efficiency ◽  
Future Research ◽  
Workpiece Material ◽  
Good Surface ◽  
Aisi 1045 Steel ◽  
Good Surface Roughness ◽  
1045 Steel ◽  
Polishing Efficiency ◽  
Coated Abrasives

A kind of elastic coated abrasives used for polishing large mould surface, such as automobile panel mould, is investigated in this research. Many polishing experiments were finished by using elastic coated abrasives in order to study the effects of grit and workpiece material on surface roughness and machining efficiency. It is concluded that surface roughness is minimum and polishing efficiency is the highest when using 120# abrasives at the same condition, surface roughness is the lowest and polishing efficiency is the highest for AISI 1045 steel in three materials. The difficulty of material removal is different if the textures prior to polishing are different in workpiece surface. Surface texture prior to polishing has effects on surface roughness and polishing efficiency. The research results provide foundation for process planning to achieve good surface roughness and high efficiency in the future research.

scholarly journals Study of the Transcription Effects of Pressing Dies with Ultrasonic Polishing on Glass Molding

Processes ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 2083
Author(s):  
Ken-Chuan Cheng ◽  
Chien-Yao Huang ◽  
Jung-Chou Hung ◽  
A-Cheng Wang ◽  
Yan-Cherng Lin
Keyword(s):  
Surface Roughness ◽  
Electrical Discharge Machining ◽  
Sine Wave ◽  
Optical Systems ◽  
Lens Array ◽  
Glass Molding ◽  
Good Surface ◽  
Good Surface Roughness ◽  
Micro Lens Array

The micro lens array (MLA) has played an important role in optical systems for the past few years, and the precision of pressing dies has dominated the quality of MLAs in glass molding. Few studies have covered the transcription effects on surface roughness of pressing dies for this technology. Therefore, this research utilized pressing dies to produce a sine-wave lens array on glass molding, to transform the Gauss-distributed spotlight into a uniform straight one and then characterize the transcription effects of these lenses. Pressing dies with a sine-wave shape were firstly cut by wire electrical discharge machining (WEDM), and then ultrasonic polishing using diamond abrasives was applied to finish the sine-wave surface with an original roughness of 0.2 μm Ra. Next, the sine-wave lens arrays were pressed by glass molding at the appropriate pressure and temperature, before evaluating the transcription effects of transforming the Gauss-distributed spotlight into a uniform straight one. The result showed that the sine-wave lens array stuck easily to the pressing die and then ruptured during glass molding due to the poor surface roughness of pressing tool. However, the diamond abrasive with appropriate sizes could establish good surface roughness on pressing dies via ultrasonic polishing, and the pressing die with a low surface roughness of 0.08 μm Ra was able to successfully perform MLA in the glass molding. However, only pressing dies with a surface roughness smaller than 0.023 μm Ra could produce precision glass lenses to transform the Gauss-distributed spotlight into a uniform straight one.

Research on Cutting Cast Super Alloy K24 with Milling and Abrasive Water Jet Methods

2011 ◽  
Vol 697-698 ◽  
pp. 157-160
Author(s):  
Yi Wan ◽  
Zhan Qiang Liu ◽  
Hong Tao Zhu ◽  
Xing Ai
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
High Efficiency ◽  
Abrasive Waterjet ◽  
Abrasive Water Jet ◽  
Good Surface ◽  
Low Efficiency ◽  
Good Surface Roughness ◽  
Super Alloy ◽  
Tool Cost

A difficult-to-machining material, cast supper alloy K24 has been cut with two different methods, milling and abrasive waterjet (AWJ). It is shown that milling is characterized by high tool cost, low efficiency, and good surface roughness while abrasive waterjet brings high efficiency and worse surface quality. The results have proven that the combination use of AWJ and milling is an efficient way in cutting K24.

scholarly journals Surface Modifications and Their Effects on Titanium Dental Implants

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
A. Jemat ◽  
M. J. Ghazali ◽  
M. Razali ◽  
Y. Otsuka
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Dental Implants ◽  
Pure Titanium ◽  
Titanium Implant ◽  
Implant Surface ◽  
Coating Application ◽  
Good Surface ◽  
Dental Implant Surface ◽  
Good Surface Roughness

This review covers several basic methodologies of surface treatment and their effects on titanium (Ti) implants. The importance of each treatment and its effects will be discussed in detail in order to compare their effectiveness in promoting osseointegration. Published literature for the last 18 years was selected with the use of keywords like titanium dental implant, surface roughness, coating, and osseointegration. Significant surface roughness played an important role in providing effective surface for bone implant contact, cell proliferation, and removal torque, despite having good mechanical properties. Overall, published studies indicated that an acid etched surface-modified and a coating application on commercial pure titanium implant was most preferable in producing the good surface roughness. Thus, a combination of a good surface roughness and mechanical properties of titanium could lead to successful dental implants.

scholarly journals Surface Quality Comparison of Down and Up cut Technique on CNC Milling Machine toward ST-37 Steel Material

2020 ◽  
Vol 2 (1) ◽  
pp. 11-20
Author(s):  
Eko Indrawan ◽  
Yufrizal A ◽  
Rifelino Rifelino ◽  
Rahmad Fajri Ula Agus Herianto
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Cutting Speed ◽  
Lower Surface ◽  
Milling Process ◽  
Cnc Milling ◽  
End Mill ◽  
Good Surface ◽  
Steel Material ◽  
Mill Cutter

The purpose of this research is comparing down and up cut technique on milling process toward ST-37 steel material by using HSS Ø12 mm end mill cutter. The surface roughness result of down cut technique is achieved Ra 2.39 μm which is equivalent to N7 roughness level at lowest cutting speed 20 m/mnt. Moreover, the highest roughness Ra 3.61 μm obtained at highest cutting speed 30 m/mnt which is equivalent to N8 roughness level. While, the quality of up cut technique yield the roughnes Ra 3.94 μm, equivalent to N8 roughness level at lowest cutting speed 20 m/minute, whilst, Ra 6.01 μm that equivalent to N9 roughness level on highest cutting speed condition 30 m/minute. The surface roughnes value achieved between N7-N9 level (ISO). Down cut technique is recommended in order to achieve good surface quality, because it could be generate lower surface roughness on material. Tujuan dari penelitian ini adalah membandingkan teknik down cut dan up cut pada proses freis terhadap material baja ST-37 dengan menggunakan end mill cutter diameter Ø12 mm. Hasil kekasaran permukaan dari teknik down cut adalah Ra 2,39 μm yang setara dengan level kekasaran N7 pada kecepatan potong terendah 20 m/mnt. Selanjutnya, kekasaran tertinggi Ra 3,61 μm diperoleh pada kecepatan potong tertiggi 30 m/mnt yang setara dengan level kekasaran N8. Sementara itu, kualitas teknik up cut menghasilkan kekasaran Ra 3,94 μm yang setara dengan level kekasaran N8 pada kecepatan potong terendah 20 m/mnt, sedangkan Ra 6,01 μm yang setara dengan level N9 pada kecepatan potong tertinggi 30 m/mnt. Harga kekasaran permukaan material diperoleh di antara level N7-N9 (nomor kekasaran ISO). Teknik down cut direkomendasikan untuk memperoleh kualitas permukaan yang baik, karena teknik ini dapat menghasilkan kekasaran permukaan yang lebih rendah pada benda kerja.

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