scholarly journals ANALISIS RADIUS PEMUTUS BERAM (CHIP BREAKER) TERHADAP KEKASARAN PERMUKAAN PADA PROSES BUBUT

INFO-TEKNIK ◽  
2018 ◽  
Vol 19 (2) ◽  
pp. 167
Author(s):  
Agus Hardjito
Keyword(s):  
Surface Roughness ◽  
Cutting Process ◽  
Chip Breaker ◽  
Chip Shape ◽  
Optimal Surface ◽  
The Difference ◽  
Chip Chip ◽  
Continuous Chip

In the cutting process on the tirning machine the shape of chips generatedvaries among long chip (continuous chip) and a dashed chip, chip shape isinfluenced by the geometry of the tool including chip breaker radius appliedcutting tool, and the radius of the breaker chip thought to have an influence onworkpiece surface roughness and tools durabulity. The influence of the radius ofthis chip breaker needs to be analyzed for how it effect the value of the surfaceroughness. The goal of my research is to find the optimal surface roughness isgenerated by certain radius enabling have to be used for guidance for thetoolmaker in turning machine in metal manufakturing. The conclusion from thisstudy is the difference in roughness significant value to the amount of burr givenradius breaker.

Critical Review of Some Previous Work on the Mechanics of the Metal-Cutting Process

1968 ◽  
Vol 90 (1) ◽  
pp. 54-62 ◽  
Author(s):  
J. A. Bailey ◽  
G. Boothroyd
Keyword(s):  
Metal Cutting ◽  
Friction Stress ◽  
Rake Angle ◽  
Cutting Process ◽  
Linear Relationships ◽  
The Mean ◽  
The Difference ◽  
Two Parameters ◽  
Relationship Of ◽  
Continuous Chip

A review is presented concerning the mechanics of the metal-cutting process where a continuous chip is produced with the absence of a built-up edge on the tool face. It is shown that previous theories which predicted a linear relationship of the form φ = A − B (β − α) between the angle parameters cannot be used to interpret the experimental data. The apparent linear relationships observed in some previous experimental work are thought to be due partly to the method of presentation of the results. It is suggested that a more significant combination of the angle parameters is the difference between the shear angle φ and the rake angle α, that is, (φ − α). It is pointed out that two parameters which can be used to describe the frictional conditions on the tool face are the mean friction stress and the mean normal stress. Since these can vary independently, it is thought unrealistic to group them together as a single variable. It is therefore concluded that the mean angle of friction is insufficient in itself to describe the frictional conditions on the tool face.

scholarly journals Effect of tillage, slope, and rainfall on soil surface microtopography quantified by geostatistical and fractal indices during sheet erosion

2020 ◽  
Vol 12 (1) ◽  
pp. 232-241
Author(s):  
Na Ta ◽  
Chutian Zhang ◽  
Hongru Ding ◽  
Qingfeng Zhang
Keyword(s):  
Surface Roughness ◽  
Fractal Dimension ◽  
Soil Surface ◽  
Rainfall Events ◽  
Tillage Practices ◽  
Surface Microtopography ◽  
Artificial Rainfall ◽  
Soil Surface Roughness ◽  
The Difference ◽  
Sheet Erosion

AbstractTillage and slope will influence soil surface roughness that changes during rainfall events. This study tests this effect under controlled conditions quantified by geostatistical and fractal indices. When four commonly adopted tillage practices, namely, artificial backhoe (AB), artificial digging (AD), contour tillage (CT), and linear slope (CK), were prepared on soil surfaces at 2 × 1 × 0.5 m soil pans at 5°, 10°, or 20° slope gradients, artificial rainfall with an intensity of 60 or 90 mm h−1 was applied to it. Measurements of the difference in elevation points of the surface profiles were taken before rainfall and after rainfall events for sheet erosion. Tillage practices had a relationship with fractal indices that the surface treated with CT exhibited the biggest fractal dimension D value, followed by the surfaces AD, AB, and CK. Surfaces under a stronger rainfall tended to have a greater D value. Tillage treatments affected anisotropy differently and the surface CT had the strongest effect on anisotropy, followed by the surfaces AD, AB, and CK. A steeper surface would have less effect on anisotropy. Since the surface CT had the strongest effect on spatial variability or the weakest spatial autocorrelation, it had the smallest effect on runoff and sediment yield. Therefore, tillage CT could make a better tillage practice of conserving water and soil. Simultaneously, changes in semivariogram and fractal parameters for surface roughness were examined and evaluated. Fractal parameter – crossover length l – is more sensitive than fractal dimension D to rainfall action to describe vertical differences in soil surface roughness evolution.

SLS Process Parameter Optimization to Improve Surface Quality and Accuracy of Polyamide Parts

2021 ◽  
Vol 11 (4) ◽  
pp. 57-74
Author(s):  
Sunil Dutt Baloni ◽  
Somesh K. Sharma ◽  
Jagroop Singh ◽  
Sushant Negi
Keyword(s):  
Surface Roughness ◽  
Layer Thickness ◽  
Surface Quality ◽  
Manufacturing Industry ◽  
Selective Laser Sintering ◽  
Anova Analysis ◽  
Part Quality ◽  
Bed Temperature ◽  
Optimal Surface ◽  
Part Orientation

The contribution of selective laser sintering (SLS) technique in the 4.0 manufacturing industry is undisputedly significant. SLS part quality exhibits high dependence on SLS process parameters and is a major challenge. Therefore, this research aims to investigate the effect of input parameters (i.e., part orientation, bed temperature, and layer thickness) on the surface roughness and accuracy of laser-sintered polyamide specimens. Response surface methodology (RSM) and ANOVA analysis aided the testing and evaluation. Optimal working conditions for minimum shrinkage were 0.17 mm layer thickness, 177.89°C part bed temperature, and part orientation at 88.91 degrees. The surface quality deteriorated with the increment in part bed temperature and layer thickness, and it shows an inverse trend (or improves) with the part orientation in the prescribed range. The optimal surface roughness was at a layer thickness of 0.11 mm, bed temperature at 174.55°C, and part orientation at 86.5 degrees.

Investigation on the Elemental Chip Formation Process in Hard-to-Machine Material Cutting

2014 ◽  
Vol 682 ◽  
pp. 504-509 ◽  
Author(s):  
A.A. Lasukov ◽  
P.A. Chazov ◽  
А.V. Barsuk
Keyword(s):  
Mechanical Properties ◽  
Formation Process ◽  
Chip Formation ◽  
Physical And Mechanical Properties ◽  
Cutting Process ◽  
Machine Material ◽  
Continuous Chip ◽  
Material Cutting

The mechanism of discontinuous chip formation has been studied less than the mechanism of continuous chip formation. However, when most modern materials having specific physical and mechanical properties are subject to machining, such processes are featured by discontinuous chip formation. The paper describes the basic dependencies of discontinuous chip parameters on machining modes. This is a trial undertaken to introduce an explanation of how the basic factors of the cutting process influence over parameters of chip formation.

Influence of On-the-Machine Laser Hardening on Machinability of Carbon Steel in Turning

2009 ◽  
Vol 407-408 ◽  
pp. 690-693
Author(s):  
Takahiko Kusano ◽  
Ryutaro Tanaka ◽  
Akira Hosokawa ◽  
Takashi Ueda ◽  
Tatsuaki Furumoto ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Carbon Steel ◽  
Hardened Steel ◽  
Laser Hardening ◽  
Hardened Zone ◽  
Spiral Form ◽  
Aisi 1045 ◽  
Steel Aisi ◽  
Turning Test ◽  
Continuous Chip

This study deals with the influence of laser hardening for a carbon steel AISI 1045 on machinability in turning. Turning test was conducted for the purpose to clarify the influence of laser hardening for steel surface on the chip controllability and surface roughness. In turning laser hardened steel, continuous chip is broken in the laser hardened zone during cutting due to higher brittleness. The broken chips have spiral form and their length is approximately equal to those generated by less than 10 revolution cutting. The surface roughness shows slightly lower compared with non-laser hardened steel.

Influence of Abrasive on Planarization Grinding Based on the Cluster Magnetorheological Effect

2011 ◽  
Vol 325 ◽  
pp. 542-547
Author(s):  
Qiu Sheng Yan ◽  
Jie Wen Yan ◽  
Jia Bin Lu ◽  
Wei Qiang Gao ◽  
Min Li
Keyword(s):  
Surface Roughness ◽  
Grain Size ◽  
Optical Glass ◽  
Removal Rate ◽  
Mr Fluid ◽  
Grinding Method ◽  
Magnetorheological Effect ◽  
The Difference ◽  
Mr Effect

A new planarization grinding method based on the cluster magnetorheological (MR) effect is presented to grind optical glass in this paper. Some process experiments were conducted to reveal the influence of the species and granularity and content of the abrasive materials in the MR fluid on the machining effect, furthermore, the machining characteristic of grinded surface was studied. The results indicate that the abrasive influences definitively on machining effect of this planarization grinding method based on the cluster MR-effect. Under the certain experiment condition, with the content of the abrasive 10% and grain size 800# of SiC, best machining effect can be achieved. The difference species of abrasive results in various machining effects. As for the removal rate of K9 optical glass: abrasive CeO2 is the best, the Al2O3 is the second and the SiC is the worst. While the surface roughness: abrasive SiC is the lowest，the Al2O3 is the second and CeO2 is the highest.

Topography and Surface Roughness of Floor in Groove Micro Milling

2014 ◽  
Vol 30 (6) ◽  
pp. 667-678 ◽  
Author(s):  
S. Kouravand ◽  
B. M. Imani ◽  
J. Ni
Keyword(s):  
Surface Roughness ◽  
Elastic Recovery ◽  
Chip Thickness ◽  
Cutting Process ◽  
Micro Milling ◽  
Tool Geometry ◽  
Proposed Model ◽  
Milling Operation ◽  
Micro Parts ◽  
Finishing Processes

AbstractMicro milling operation is a fabrication process to create 3D parts from tens of micrometers to a few millimeters in size using a tool with diameter less than 1mm. Micro groove is one of the common features observed in the micro parts. The surface roughness of micro grooves plays an important role in their performance. Since most of the finishing processes could not be easily performed on the micro grooves, it is of extreme importance to find a relationship between micro milling parameters and the surface roughness profile. In this paper, in order to anticipate the profile and surface roughness of the groove floor a model is proposed based on the kinematic of cutting process and tool geometry. The effects of minimum chip thickness, elastic recovery, size effect and tool deflection are included in the model. Relationship between position of points on the floor surface of groove and kinematics of cutting process are derived. In next step, simulations of proposed model are performed in the ACIS environment. Finally, using the DOE method surface roughness is investigated stochastically. The simulated and measured surface roughnesses are compared together that confirm the validity of proposed model.

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