Effect of Scanning Interval on Polishing Effect of S136D Die Steel

2021 ◽  
Vol 1020 ◽  
pp. 55-59
Author(s):  
Hao Zhou ◽  
Zhen Yu Zhao ◽  
Hou Ming Zhou ◽  
Kai Li ◽  
Jing Cheng Jin
Keyword(s):  
Material Processing ◽  
Surface Roughness ◽  
Laser Scanning ◽  
Reduction Rate ◽  
Single Factor ◽  
Continuous Fiber ◽  
Laser Polishing ◽  
Die Steel ◽  
Experiment Method ◽  
Single Factor Experiment

Laser polishing technology plays an increasingly important role in the material processing technology.In order to study the influence of scanning interval on the polishing effect of S136D die steel, the single factor experiment method is used in this paper. The continuous fiber laser is used to carry out many laser polishing experiments and the influence of laser scanning interval on the surface morphology of S136D die steel is analyzed.The results show that the surface roughness of polished samples decreases first and then increases with the of scanning interval. When the scanning interval is in the range of 0.03-0.1mm, the surface roughness of samples is relatively flat, and the lowest surface roughness can be reduced to 0.781μm, and the reduction rate of surface roughness can reach 90.2%.

Research on Surface Roughness of Die Steel in Micro-Etching

2013 ◽  
Vol 785-786 ◽  
pp. 896-900
Author(s):  
Hong Guang Huang ◽  
Guan Wang ◽  
Zhong Ning Guo ◽  
Qing Song ◽  
Yu Deng
Keyword(s):  
Surface Roughness ◽  
Laser Scanning ◽  
Etching Time ◽  
Micro Channel ◽  
Die Steel ◽  
Etching Method ◽  
Etching Factor ◽  
Relationship Of ◽  
The Relationship

In this study, the 300 µm width micro-channel was manufactured by spray etching method. The surface roughness was analyzed by Laser scanning con-focal microscope. The relationship of the surface roughness and etching factor such as spray etching pressure, mask gap and time had been studied. The results show that the surface roughness increases initially, and then reduces with the size of mask gap. While the roughness increases as the spraying pressure increases. The etching time plays slightly effect on roughness for it has no impact on the etch uniformity as mask gap and spray pressure do.

scholarly journals Laser Polishing of Additive Manufactured Aluminium Parts by Modulated Laser Power

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1332
Author(s):  
Markus Hofele ◽  
André Roth ◽  
Jochen Schanz ◽  
Johannes Neuer ◽  
David K. Harrison ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Energy Density ◽  
Laser Power ◽  
Modulation Frequency ◽  
Reduction Rate ◽  
Initial Surface ◽  
Process Stability ◽  
Laser Polishing ◽  
Melt Pool ◽  
Power Curves

In this study a new approach to laser polishing with periodic modulated laser power in the kilohertz regime is introduced. By varying the modulation frequency and modulation time, different periodic laser power curves with varying minimum, peak and average laser power can be created. The feasibility of the method is shown by polishing of vertical built AlSi10Mg L-PBF parts with an initial roughness of Ra = 12.22 µm. One polishing pass revealed a decreasing surface roughness with increasing energy density on the surface up to Ra = 0.145 µm. An increasing energy density results in a rising remelting depth between 50 and 255 µm and a rising relative porosity of 0.3% to 4.6%. Furthermore, the thermal process stability, analysed by the melt pool length in scanning direction, reveals a steadily increasing melt pool dimension due to component heating. Multiple laser polishing passes offers a further reduced surface roughness, especially at higher modulation frequencies and provides an improved orientation independent roughness homogeneity. The process stability regarding varying initial surface roughness revealed an almost constant relative roughness reduction rate with an achievable roughness variation after two polishing passes between Ra = 0.13–0.26 µm from an initial state of Ra = 8.0−19.2 µm.

Experimental Study of Optical Glass on Ultrasonic Assisted Grinding Process

2013 ◽  
Vol 433-435 ◽  
pp. 1999-2002
Author(s):  
Xin Yu Liu ◽  
Li Fen Hou ◽  
Ren Ping Zou
Keyword(s):  
Surface Roughness ◽  
Optical Glass ◽  
Grinding Force ◽  
Grinding Process ◽  
Ultrasonic Assisted Grinding ◽  
Force Increase ◽  
Experiment Method ◽  
Ultrasonic Assisted ◽  
Conventional Grinding ◽  
Single Factor Experiment

The mechanism of ultrasonic assisted grinding is presented. Single factor experiment method was used to conduct experiments in order to reveal the effect of different grinding parameters (including feed rate, spindle speed, grinding depth) on surface roughness and grinding force of optical glass in ultrasonic assisted grinding and conventional grinding. The experiment data wss analyzed and it shows that the surface roughness and tangential grinding force decrease while the axial grinding force increase in ultrasonic assisted grinding process than that in conventional grinding process.

Optimization of Sanding Parameters for Surface of Pyinkado Plates

2012 ◽  
Vol 174-177 ◽  
pp. 175-179 ◽  
Author(s):  
Jian Min Zhang ◽  
Chu Wang Su ◽  
Jing Da Huang ◽  
Yi Ren ◽  
Ze Kun Wang
Keyword(s):  
Surface Roughness ◽  
Wood Surface ◽  
Production Efficiency ◽  
Orthogonal Experiment ◽  
Engineering Optimization ◽  
Single Factor ◽  
Optimization Scheme ◽  
Feeding Speed ◽  
Single Factor Experiment ◽  
Wood Surface Roughness

Abstract: In order to analyze the relation between surface roughness of Pyinkado plates and sanding parameters, an orthogonal experiment and a single factor experiment were performed. The results show that the mesh of the sandpaper has remarkable influence on surface roughness of Pyinkado plates, but the feeding speed and sanding thickness don’t; when the mesh of the sandpaper is 150, the feeding speed is 6 m/min and sanding thickness is 0..4 mm during the first sanding and the mesh of the sandpaper is 240, the feeding speed is 9m/min and sanding thickness is 0.15mm during the second sanding, the smallest roughness (Ra) was obtained as 2.81μm. Considering production efficiency, changing feeding speed into 9 m/min in the theory optimization scheme, engineering optimization scheme was obtained, and the wood surface roughness (Ra) is 2.91μm.

scholarly journals Mechanical Characterization and Thermodynamic Analysis of Laser-Polished Landscape Design Products Using 3D Printing

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2601
Author(s):  
Yue Ba ◽  
Yu Wen ◽  
Shibin Wu
Keyword(s):  
Surface Roughness ◽  
3D Printing ◽  
Fused Deposition Modeling ◽  
High Surface ◽  
Landscape Design ◽  
Laser Polishing ◽  
Fused Deposition ◽  
Design Structure ◽  
3D Printed ◽  
Stability And Accuracy

Recent innovations in 3D printing technologies and processes have influenced how landscape products are designed, built, and developed. In landscape architecture, reduced-size models are 3D-printed to replicate full-size structures. However, high surface roughness usually occurs on the surfaces of such 3D-printed components, which requires additional post-treatment. In this work, we develop a new type of landscape design structure based on the fused deposition modeling (FDM) technique and present a laser polishing method for FDM-fabricated polylactic acid (PLA) mechanical components, whereby the surface roughness of the laser-polished surfaces is reduced from over Ra 15 µm to less than 0.25 µm. The detailed results of thermodynamics and microstructure evolution are further analyzed during laser polishing. The stability and accuracy of the results are evaluated based on the standard deviation. Additionally, the superior tensile and flexural properties are examined in the laser-polished layer, in which the ultimate tensile strength (UTS) is increased by up to 46.6% and the flexural strength is increased by up to 74.5% compared with the as-fabricated components. Finally, a real polished landscape model is simulated and optimized using a series of scales.

Application of Taguchi and Response Surface Methodologies for Surface Roughness in Rotary Tool Polishing Hardness Mould Steels

2011 ◽  
Vol 87 ◽  
pp. 82-89
Author(s):  
Potejanasak Potejana ◽  
Chakthong Thongchattu
Keyword(s):  
Surface Roughness ◽  
Response Surface ◽  
Laser Scanning ◽  
Cutting Speed ◽  
Optimal Level ◽  
Confocal Laser ◽  
Milling Machine ◽  
Cnc Milling ◽  
Polishing Process ◽  
Cnc Milling Machine

This research proposes a new application of 3-axis CNC milling machine for polishing the 60 HRC hardness steels. The rotary polishing tools are designed by refer to the end-mill ball nose’s design. The diamond powder are coated in rotary polishing tools by resinoid bonding method and concentrated in 4.4 karat/cm2. The Zig-milling tool paths are used to polish the hardness steel. After polishing, the confocal laser scanning microscope is used to analyze the arithmetic mean surface roughness of the hardness steels. The L12 orthogonal array of the Taguchi’s method is selected to conduct the matrix experiment to determine the optimal polishing process parameters. The diamond grit size and cutting speed of the rotary polishing tools, feed rate and step over of the tool path, the depth of polishing process penetration, and polishing time are used to study. The combination of the optimal level for each factor of the hardness steel polishing process are used to study again in the confirmation experiment. The predicted signal to noise ratio of smaller - the better under optimal condition are calculated by using the data from the experiment. The combination of the optimal level for each factor are used to study again in the confirmation experiment and the result show that polishing time was a dominant parameter for the surface roughness and the next was depth of penetration. The response surface design is then used to build the relationship between the input parameters and output responses. The experimental results show that the integrated approach does indeed find the optimal parameters that result in very good output responses in the rotary polishing tools polished hardness mould steel using CNC milling machine. The mean surface roughness of hardness steel polishing process is improved by the diamond rotary tools with the 3-axis CNC milling machine.

scholarly journals Effect of Optical and Morphological Control of Single-Structured LEC Device

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 843
Author(s):  
Woo Jin Jeong ◽  
Jong Ik Lee ◽  
Hee Jung Kwak ◽  
Jae Min Jeon ◽  
Dong Yeol Shin ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Surface Roughness ◽  
Surface Properties ◽  
High Efficiency ◽  
High Surface ◽  
Reduction Rate ◽  
Operating Characteristics ◽  
Emission Layer ◽  
Light Emitting ◽  
Stable Operating

We investigated the performance of single-structured light-emitting electrochemical cell (LEC) devices with Ru(bpy)3(PF6)2 polymer composite as an emission layer by controlling thickness and heat treatment. When the thickness was smaller than 120–150 nm, the device performance decreased because of the low optical properties and non-dense surface properties. On the other hand, when the thickness was over than 150 nm, the device had too high surface roughness, resulting in high-efficiency roll-off and poor device stability. With 150 nm thickness, the absorbance increased, and the surface roughness was low and dense, resulting in increased device characteristics and better stability. The heat treatment effect further improved the surface properties, thus improving the device characteristics. In particular, the external quantum efficiency (EQE) reduction rate was shallow at 100 °C, which indicates that the LEC device has stable operating characteristics. The LEC device exhibited a maximum luminance of 3532 cd/m2 and an EQE of 1.14% under 150 nm thickness and 100 °C heat treatment.

scholarly journals Towards the prediction of surface roughness induced by the belt finishing process: influence of the workmaterial on the roughness reduction rate

Procedia CIRP ◽  
2020 ◽  
Vol 87 ◽  
pp. 210-215
Author(s):  
F. Cabanettes ◽  
O. Cherguy ◽  
C. Courbon ◽  
A. Giovenco ◽  
S. Han ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Reduction Rate ◽  
Finishing Process
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