The Investigation of Abrasive Jet Polishing on the Linear Micro-Channels Surface of SKD61 Mold Steel

2013 ◽  
Vol 652-654 ◽  
pp. 1799-1804
Author(s):  
Feng Che Tsai ◽  
Ting Cheng Chang ◽  
Miao Yu Kuo ◽  
Ta Chen Li
Keyword(s):  
Surface Quality ◽  
Surface Hardening ◽  
Gas Atomization ◽  
Direct Impact ◽  
Good Surface ◽  
Mix Proportion ◽  
Abrasive Jet Polishing ◽  
Micro Channels ◽  
Wax Coating ◽  
Coated Abrasives

This study examined the performance of abrasive jet polishing (AJP) on SKD61 mold surfaces using wax-coated SiC abrasives fabricated by gas atomization and the comparison of surface quality achieved by revealing significant surface roughness reduced with wax-coated abrasives. The wax coating of SiC abrasives smooth the sharp surfaces of abrasive powders and provides a cushioning buffer. These two features contribute and improve the direct impact of heavy peening, thus preventing surface hardening, superficial embedment or deep scratches. Furthermore, compound additives including water wax and water were added to the wax-coated #3000 SiC abrasives at a mix proportion of 500: 1000: 1500 (water wax: wax-coated SiC: water) for polishing micro-channels surfaces. The experimental results show that the compound additives provide addition cushioning effect facilitate the sliding and grinding of abrasives, resulting in fine polishing and good surface quality. The reflection properties of both linear and curved micro-channels were much enhanced by AJP using wax-coated #3000 SiC abrasives with the compound additives.

Abrasive Jet Polishing of Micro Groove Using Compound SiC Abrasives with Compound Additives

2011 ◽  
Vol 418-420 ◽  
pp. 2153-2157
Author(s):  
Feng Che Tsai ◽  
Shie Chen Yang ◽  
Tsuo Fei Mao ◽  
Chi Jung Chen ◽  
Shiou Shen Liou
Keyword(s):  
Surface Quality ◽  
Surface Hardening ◽  
Gas Atomization ◽  
Direct Impact ◽  
Good Surface ◽  
Mix Proportion ◽  
Abrasive Jet Polishing ◽  
Abrasive Surface ◽  
Wax Coating ◽  
Coated Abrasives

This Study Examined the Performance of Abrasive Jet Polishing (ajp) on Skd61 Mold Surfaces Using Wax-coated Sic Abrasives Fabricated by Gas Atomization. Comparison of Surface Quality Achieved Reveals Significant Surface Roughness Reduction by Wax-coated Abrasives. the Wax Coating Not only Covers Most of the Sharp Ends of the Abrasive, Thus Making Smooth the Abrasive Surface; it Being Elastic Also Provides a Cushioning Buffer. these Two Features Contribute to Ameliorate the Direct Impact of Heavy Peening, Thus Preventing Surface Hardening, Superficial Embedment or Deep Scratches. Moreover, Compound Additives Including Water Wax and Water Were Added to the Wax-coated #3000 Sic Abrasives at a Mix Proportion of 500: 1000: 1500 (water Wax: Wax-coated Sic: Water) for Polishing Mold Surfaces of Different Forms. Results Show that the Compound Additives Provide Addition Cushioning Effect and Facilitate the Sliding and Grinding of Abrasives, Resulting in Fine Polishing and Good Surface Quality. the Reflection Property of Micro-groove Was much Enhanced by Ajp Using Wax-coated #3000 Sic Abrasives with the Compound Additives.

Synthesis of high-temperature thermally expandable microcapsules and their effects on foaming quality and surface quality of foamed ABS materials

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 519-527
Author(s):  
Wei Gong ◽  
Xianglin Pei ◽  
Xiaogang Yin ◽  
Daming Ban ◽  
Hai Fu ◽  
...  
Keyword(s):  
High Temperature ◽  
Surface Quality ◽  
Volume Fraction ◽  
Crosslinking Agent ◽  
Acrylonitrile Butadiene Styrene ◽  
Foaming Agent ◽  
Blowing Agent ◽  
Good Surface ◽  
Butadiene Styrene

AbstractIn this paper, acrylonitrile and hydroxypropyl acrylate are used as the binary polymerization monomers, and isooctane is used as the foaming agent to prepare high-temperature thermally expandable microcapsules. Analysis of the effect of blowing agent and crosslinking agent on the expansion properties of high-temperature thermally expandable microcapsules, the effects of foaming agent azodicarbonamide (ADCA) and micro-expansion capsule on the surface quality and foaming quality of foamed acrylonitrile–butadiene–styrene (ABS) products were investigated. The foamed product prepared by the high-temperature microcapsule has a good surface quality, the gloss is 52.3, the cell is not easily deformed, and the volume fraction is 4%; the foamed ABS/ADCA material has poor cell uniformity, the cell is easily deformed, the volume fraction is 6.5%, the surface quality is poor, and the gloss is only 8.7.

Sol-Gel Derived Titania/Hydroxyapatite Layer on Titanium Substrate

2011 ◽  
Vol 117-119 ◽  
pp. 332-334 ◽  
Author(s):  
Wen Yan Wang ◽  
Yu Wu ◽  
Jing Pei Xie ◽  
Gao Lu ◽  
Xiao Ming Dong ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Surface Quality ◽  
Phase Formation ◽  
Volume Fraction ◽  
Sol Gel ◽  
Calcium Nitrate ◽  
Titanium Substrate ◽  
Gel Method ◽  
Good Surface ◽  
Coating Method

In this study, calcium nitrate(Ca(NO3)2•4H2O) and phosphorus pentoxide(P2O5) were used as precursor to prepare hydroxyapatite(HA) layer by sol-gel method, followed by a dipping-coating method to coat HA layer onto Ti. Phase formation and microstructure were investigated by XRD and SEM to study the influence of atmosphere on the property of HA layer. The results revealed that there exists no large cracks in the layer which was heated in the nitrogen, leading to a good surface quality compared with the layer which was heated in the air. And there is no obvious difference in crystallinity and volume fraction of HA in the layer when adopting heat treatment in different atmospheres.

Surface Quality Prediction in Case of Steep Free Form Surface Milling

2016 ◽  
Vol 686 ◽  
pp. 119-124 ◽  
Author(s):  
Balázs Mikó
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Tool Path ◽  
Complex Geometry ◽  
Cutting Parameters ◽  
Free Form ◽  
Milling Cutter ◽  
Good Surface ◽  
2.5D Milling ◽  
Free Form Surfaces

The machining of free form surfaces is a current and important issue in die and mould industry. Beside the complex geometry, an accurate and productive machining and good surface quality are needed. The finishing milling carried out by a ball-end or toroid milling cutter defines the surface quality, which is characterized by the surface roughness and the tool path trace. The surface quality is defined by the properties of the milling cutter, the type of surface and its position, as well as the cutting parameters. This article focuses on the z-level milling of steep surfaces by 2.5D milling strategy. The importance of the different elements of the tool path is presented, the effect of cutting parameters is investigated, and a formula to predict the surface roughness is suggested.

scholarly journals Analysis of Machinability and Crack Occurrence of Steels 1.2363 and 1.2343ESR Machined by Die-Sinking EDM

Coatings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 406
Author(s):  
Katerina Mouralova ◽  
Libor Benes ◽  
Josef Bednar ◽  
Radim Zahradnicek ◽  
Tomas Prokes ◽  
...  
Keyword(s):  
Surface Quality ◽  
Regression Equations ◽  
Graphite Electrodes ◽  
Copper Electrodes ◽  
Good Surface ◽  
Transmission Electron ◽  
Hardness Change ◽  
Pulse On Time ◽  
Pulse Off Time ◽  
Machined Surfaces

Die-sinking electric discharge machining (EDM) is an indispensable technological operation, especially in the production of molds and all internal and external shapes and cavities. For this reason, the effect of machine parameter settings (open-voltage, pulse current, pulse on time, and pulse off time) on the machining of two types of steels, 1.2363 and 1.2343ESR, was carefully investigated using graphite or copper electrodes in 10 mm × 10 mm or 100 mm × 100 mm shapes. For this purpose, a two-level half factor experiment was performed with one replication at the corner points and two replications at the central points, with a total of 80 rounds. The subject of the evaluation was the topography and morphology of machined surfaces including a detailed analysis of surface and subsurface defects in the form of cracks including the creation of regression equations describing the probability of crack occurrence. Furthermore, a study of the local hardness change in the subsurface area was performed, and lamellas were also made and studied by transmission electron microscopy. It has been found that by using die-sinking EDM, it is possible to effectively predict the probability of cracking on machined surfaces and also on machine 1.2363 and 1.2343ESR steels with a very good surface quality of Ra 1.9 and 2.1 µm using graphite electrodes. These findings will ensure the production of parts with the required surface quality without cracks, which is a crucial aspect for maintaining the required functionality and service life of the parts.

Surface quality of carbon/carbon composite after ultrasonic assisted turning

2011 ◽  
Vol 225 (11) ◽  
pp. 2144-2148 ◽  
Author(s):  
F J Ma ◽  
D M Guo ◽  
R K Kang ◽  
Y J Ren
Keyword(s):  
Surface Quality ◽  
Evaluation Method ◽  
Diamond Tool ◽  
Polycrystalline Diamond ◽  
Carbon Composite ◽  
Distribution Characteristics ◽  
Good Surface ◽  
Ultrasonic Assisted ◽  
Machining Defect

It is usually hard to obtain a good surface quality of carbon/carbon (C/C) composite by turning due to its non-homogeneity and anisotropy. Contrasting experiments of ultrasonic assisted turning (UAT) and common turning (CT) of the C/C composite were carried out using a polycrystalline diamond tool. The cylindrical surface of the turning was classified into four typical types based on different fibre orientations. The influence of fibre distribution characteristics on surface roughness was analysed by measuring and comparing the roughness of these surfaces, and an evaluation method of surface quality for the C/C composite after turning was established. The results of UAT experiments on the C/C composite show that UAT could effectively reduce the machining defect. The roughness of typical surfaces 1 and 2 machined using UAT was about 20 per cent lower than that using CT.

Experimental Study of Pulsed Electrolyte Jet Machining for Small Hole

2010 ◽  
Vol 458 ◽  
pp. 307-312 ◽  
Author(s):  
Yi Quan Yu ◽  
Jian She Zhao ◽  
Bing Hui Li ◽  
Jia Wen Xu
Keyword(s):  
Surface Quality ◽  
High Surface ◽  
Pulse Power ◽  
Small Hole ◽  
High Surface Quality ◽  
Good Surface ◽  
Dc Power ◽  
Hole Making ◽  
Main Effects ◽  
Electrolyte Jet

For the difficulties of machining small hole on difficult-to-cut materials, a study of hole-making technology by pulsed electrolyte jet machining is carried out. Main effects of DC power and pulse power on the hole conicity, surface quality and drilling efficiency are studied in this paper. The experiment results show that: hole with high surface quality can be available and the hole conicity is effectively reduced by using pulsed electrolyte jet machining; DC is suitable for improving efficiency when the ECM voltage is less than 300V, while pulse power supply shall be adopted to achieve good surface quality and high drilling efficiency when the ECM voltage is more than 300V.

Research and Application of Wire Cutting Mold Surface Roughness

2012 ◽  
Vol 217-219 ◽  
pp. 1577-1580
Author(s):  
Xiao Long Shen ◽  
Lai Xi Zhang ◽  
Nan Lin Yu
Keyword(s):  
Surface Roughness ◽  
Theoretical Analysis ◽  
Surface Quality ◽  
High Speed ◽  
Mold Surface ◽  
Surface Processing ◽  
Surface Machining ◽  
Good Surface ◽  
Wire Cutting ◽  
Discharge Gap

The article aimed at mold parts surface machining, has been studied high speed wire cutting technology. Explored the process evaluation factors which impact wire cutting mold based on the theoretical analysis of the wire cutting discharge gap and the surface processing finish of the mold parts. By studying the two main elements which affect the mold parts surface roughness processing, measures of improve and enhance wire cutting mold surface roughness are proposed. Only the comprehensive account of various factors can obtain mould parts processing good surface quality. The research methods and conclusion have provided reference on solving the problem of mold parts surface roughness by WEDM.

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 Analysis and Optimization of Ceramic Cutting Tool In Hard Turning of EN-31 Using Factorial Design

2012 ◽  
pp. 53-58
Author(s):  
Chetan Darshan ◽  
Lakhvir Singh ◽  
APS Sethi
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Analysis Of Variance ◽  
Feed Rate ◽  
Hard Turning ◽  
Flank Wear ◽  
Cutting Speed ◽  
Depth Of Cut ◽  
Good Surface ◽  
En 31

Manufacturers around the globe persistently looking for the cheapest and quality manufactured machined components to compete in the market. Good surface quality is desired for the proper functioning of the produced parts. The surface quality is influenced by cutting speed, feed rate and depth of cut and many other parameters. In the present study attempt has been made to evaluate the performance of ceramic inserts during hard turning of EN-31 steel. The analysis of variance is applied to study the effect of cutting speed, feed rate and depth of cut on Flank wear and surface roughness. Model is found to be statically significant using regression model, while feed and depth of cut are the factor affecting Flank wear and feed is dominating factors for surface roughness. The analysis of variance was used to analyze the input parameters and there interactions during machining. The developed model predicted response factor at 95% confidence level.

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