The Investigation on Small Hole Drilling-Grinding in Glass and Ceramic

2010 ◽  
Vol 126-128 ◽  
pp. 258-262 ◽  
Author(s):  
Yan Ming Quan ◽  
Jia Jia Chen ◽  
Hao Xu
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Grinding Force ◽  
Small Hole ◽  
Hole Drilling ◽  
Grinding Process ◽  
The Core ◽  
Removal Capacity ◽  
Twist Drills ◽  
Chip Removal

Making holes in glass or ceramic with conventional twist drills is difficult because of the hard and brittle properties of the workpieces, but the drilling-grinding process with diamond core-tools has found application in the field due to its high efficiency and low cost. However, small hole drilling-grinding with the core tools is still a challenge because the small core tools have a limited strength and chip-removal capacity. In this paper, the small hole drilling-grinding in glass and ceramic by diamond core-tools with 4mm diameter is experimentally investigated, the drilling-grinding force and heat are measured and calculated, the performances of two types of electroplating diamond core tools are compared.

Recent Progress on Adsorption Materials for Phosphate Removal

2019 ◽  
Vol 13 (1) ◽  
pp. 3-16 ◽  
Author(s):  
Saeed Ahmed ◽  
Muhammad Naeem Ashiq ◽  
Dianqing Li ◽  
Pinggui Tang ◽  
Fabrice Leroux ◽  
...  
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Low Cost ◽  
Development Trend ◽  
Phosphate Removal ◽  
High Concentration ◽  
The Public ◽  
Removal Capacity ◽  
Detailed Search ◽  
Double Hydroxides

Background: High concentration of phosphate has been threatening human health and the ecosystem. Adsorption is one of high-efficiency and low-cost techniques to reduce the concentration of phosphate. This mini review aims to summarize the recent development of adsorption materials for phosphate removal. Method: We conducted a detailed search of “adsorption of phosphate” in the published papers and the public patents on the adsorbents for phosphate based on Web of Science database in the period from January 1 2012 to December 31 2017. The corresponding literature was carefully evaluated and analyzed. Results: One hundred and forty one papers and twenty two recent patents were included in this review. An increased trend in scientific contributions was observed in the development of adsorption materials for phosphate removal. Three kinds of promising adsorbents: layered double hydroxides, natural materials, and metal oxides were paid special attention including removal mechanism, performance as well as the relationship between adsorption performance and structure. Both the chemical composition and the morphology play a key role in the removal capacity and rate. Conclusion: The findings of this review confirm the importance of phosphate removal, show the development trend of high-performance and low-cost adsorption materials for phosphate removal, and provide a helpful guide to design and fabricate high-efficiency adsorbents.

Study on Cloud-Based Service Platform for Mass Customization

2012 ◽  
Vol 479-481 ◽  
pp. 98-101 ◽  
Author(s):  
Jun Hua Che ◽  
Qian Zeng ◽  
Shu You Zhang
Keyword(s):  
Mass Customization ◽  
High Efficiency ◽  
Low Cost ◽  
Supply And Demand ◽  
Service Platform ◽  
The Core ◽  
Platform Architecture ◽  
Core Technology ◽  
The Individual ◽  
Core Capabilities

The core capabilities are to provide full product space for customers with the low cost and high efficiency in customized manufacturers, and ultimately to meet the individual demand of customers. This paper proposes cloud-based service platform for mass customization by the advantages of cloud computing, in order to effectively achieve the company's core capabilities and integration of resources and meet the supply and demand between the fluctuations in orders and the long-lasting manufacturing capabilities. This paper mainly studies the service platform architecture and the core technology to improve the service capacity of mass customization business through the integration of resources, demand integration and optimal configuration.

Effects of Cold Air Supply on Cutting Characteristics in Small Hole Drilling of PEEK

2020 ◽  
Author(s):  
Shogo Ito ◽  
Mitsuyoshi Nomura ◽  
Tatsuya Fujii ◽  
Tsunehisa Suzuki
Keyword(s):  
High Precision ◽  
High Efficiency ◽  
Small Hole ◽  
Machining Process ◽  
Hole Drilling ◽  
Air Cooling ◽  
Experimental Conditions ◽  
Cold Air ◽  
Air Supply ◽  
Cutting Heat

Abstract A polyetheretherketone (PEEK) is one of the thermoplastic resins. The material is superior in mechanical strength, heat resistance and chemical resistance. Therefore, it is suitable for industrial components such as automotive parts, machine parts, electrical and electronics parts. Particularly, it is used for an inspection socket of a connector and the semiconductor package in the field of electronic components. Consequently, a demand of the high efficiency machining in small drilling for the PEEK increases with a miniaturization and diversification of the industrial equipment. However, PEEK, which is a thermoplastic resin, has a problem that the hole accuracy is lowered due to the cutting heat. The objective of this study is to achieve high precision and high efficiency machining process for industrial components of the PEEK such as an inspection socket of a connector or the semiconductor package. In order to solve these problems, this study carries out cooling workpiece by cold air supply. This paper describes the investigation result of the effect of cold air cooling on hole accuracy and cutting state in the small hole machining of PEEK. As a result, it was found that cooling the workpiece is effective to suppressing the cutting heat and improve hole accuracy. Within the experimental conditions, the combination of non-step drilling and cooling enables high-precision drilling with approximately the same accuracy as step drilling.

Optimization of Immobilized Microorganisms Technology to Cr (VI) in Wastewater

2015 ◽  
Vol 1092-1093 ◽  
pp. 886-891
Author(s):  
Yan Xu ◽  
Xiao Ming Chen ◽  
Chao Wang ◽  
Chen Ruan ◽  
Xiao Ling Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
High Efficiency ◽  
Removal Rate ◽  
Low Cost ◽  
Nutrient Source ◽  
Removal Capacity ◽  
Significant Difference ◽  
Immobilized Microorganisms ◽  
Immobilized Microorganism

In order to establish a low cost and high efficiency immobilized microorganism system to treat Cr (VI) wastewater, the effects to removal capacity to Cr (VI) of microbe strain, additives and medium were investigated. These strains were immobilized with SA (sodium alginate) by immobilized microorganism technology combined with three additives CNTs (carbon nanotubes), activated carbon, straw and nutrient source, respectively. The results showed that three kinds of additives could improve the removal effect to Cr (VI), and the removal rate up to 30% when Cr (VI) concentration was 10mg/L. There was not a significant difference among these additives. The solution contains 40% medium could significantly improve the removal capacity to Cr (VI). The removal rate could reach more than 98% when Cr (VI) concentrations were 10mg/L-20mg/L. Therefore, efficient strains, additives and medium could improve the removal capacity to Cr (VI) of immobilized microorganism technology. It can be widely used in chromium contaminated wastewater.

Research on Wheel Wear in HIPSN Bearing Ring High Speed Grinding

2009 ◽  
Vol 416 ◽  
pp. 77-81
Author(s):  
He Wang ◽  
Yu Hou Wu ◽  
Ke Zhang ◽  
Song Hua Li
Keyword(s):  
Silicon Nitride ◽  
High Speed ◽  
High Efficiency ◽  
Low Cost ◽  
Grinding Force ◽  
Wheel Wear ◽  
Bearing Ring ◽  
Ceramic Bearing ◽  
Grinding Ratio ◽  
High Speed Grinding

This paper reports on the wheel wear in high speed grinding silicon nitride used metal bond diamond wheels. The investigation focuses on the relation among grinding force, grinding ratio and wheel wear. Experiments have been performed to investigate the factor of wheel wear such as grinding ratio and grinding force. The results of these investigations are presented in this paper. With the application of this technology, a low cost production and high efficiency of ceramic bearing ring grinding can be realized.

Indoor Positioning System Based on RFID

2014 ◽  
Vol 543-547 ◽  
pp. 2627-2631 ◽  
Author(s):  
Liang Xi ◽  
Ming Yan Jiang ◽  
Chuan Zhu Liao
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Indoor Positioning ◽  
Target Area ◽  
Positioning System ◽  
The Core ◽  
Electronic Tag ◽  
Electronic Tags ◽  
Received Signal Strength Indication ◽  
Indoor Positioning System

This paper presents an indoor positioning system based on RFID, which introduces electronic tag assisted positioning, according to the plurality of the electronic tags which are arranged in the target area as equilateral triangle, and the reader reads the information and Received Signal Strength Indication (RSSI) within its reading range. Sampling and calculation of the positioning result is controlled by the core circuit. Experimental results show that the indoor positioning system has excellent positioning accuracy, with high efficiency and low cost.

Small Hole Drilling for Polyphenylene Sulfide (PPS) - Influence of Depth-of-Cut on Burr Formation

2014 ◽  
Vol 1017 ◽  
pp. 355-360
Author(s):  
Mitsuyoshi Nomura ◽  
Kouta Suzuki ◽  
Yong Bo Wu ◽  
Masakazu Fujimoto
Keyword(s):  
High Efficiency ◽  
Thrust Force ◽  
Radial Force ◽  
Polyphenylene Sulfide ◽  
Small Hole ◽  
Burr Formation ◽  
Hole Drilling ◽  
Depth Of Cut ◽  
Force Increase ◽  
Better Than

Cutting technology is one of the important methods to fabricate small-sized precision components in the semiconductor, electro-mechanics, and automobile industries. This paper focuses on high efficiency machining of small hole drilling for PPS (Polyphenylene Sulfide). In this paper, drilling experiments were designed to investigate the influence of the depth of cut on the burr formation. The experimental results obtained are as follows, (1) The thrust force and radial force increase with the increase in feed per revolution and depth-of-cut. (2) On the prevention of burr formation, the step feed is better than the non-step feed. Also, the burr formation decreases with the increase in the feed per revolution. (3) The hole straightness increases with the increase in depth-of-cut.

Analysis of Grinding Force Influence on HIPSN Ceramic Grinding Surface

2009 ◽  
Vol 416 ◽  
pp. 51-53
Author(s):  
Ke Zhang ◽  
He Wang ◽  
Yu Hou Wu ◽  
Song Hua Li
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Removal Rate ◽  
Low Cost ◽  
Dynamic Performance ◽  
Grinding Force ◽  
Material Surface ◽  
Machining Quality ◽  
Ceramic Ring ◽  
Ceramic Machining

In ceramic machining field, the ultimate goal is to keep material surface integrity, dimension precision and max material removal rate synchronously. HIPSN ceramic ring high speed grinding experiments and researches have been performed, by testing and analyzing grinding force, combining grinding motorized spindle dynamic performance with grinding surface roughness, the influences on ceramic machining quality have been discussed. The grinding parameter can be chose in precondition promising machining quality. It possesses guidance significance in low cost, high efficiency precise ceramic parts machining.

Research on Vibration Grinding Deburring and Finishing Process

2011 ◽  
Vol 230-232 ◽  
pp. 544-548
Author(s):  
Peng Zhang ◽  
Xing Yu Guo ◽  
Zhi Guang Guan ◽  
Shao Fu Shan
Keyword(s):  
Low Cost ◽  
Surface Finishing ◽  
Hole Drilling ◽  
Grinding Process ◽  
Labor Intensity ◽  
Finishing Process ◽  
New Process ◽  
Micro Hole ◽  
Grinding System ◽  
Process Method

In mechanical manufacturing, the traditional methods adopted for deburring and finishing is not only high labor intensity, but also difficult to reach the surface roughness and requirements. The vibration grinding deburring and finishing process method is put forward, and the removal of micro hole drilling burr and surface finishing experiments are carried. It can be seen from the experimental results that the vibration grinding process method can thoroughly remove burr and get the finishing effect. The vibration grinding system has the features of low cost and brief operation. The vibration grinding new process method has high practical value.

Influence of MBE Growth Conditions on Dislocation Densities of GaAs/Ge Epilayers Grown on Silicon Substrates

1985 ◽  
Vol 43 ◽  
pp. 364-365
Author(s):  
K.M. Hones ◽  
P. Sheldon ◽  
B.G. Yacobi ◽  
A. Mason
Keyword(s):  
High Efficiency ◽  
Lattice Mismatch ◽  
Low Cost ◽  
Growth Conditions ◽  
Nonradiative Recombination ◽  
Device Structure ◽  
Si Substrates ◽  
Transmission Electron ◽  
Dislocation Densities ◽  
Dislocation Type

There is increasing interest in growing epitaxial GaAs on Si substrates. Such a device structure would allow low-cost substrates to be used for high-efficiency cascade- junction solar cells. However, high-defect densities may result from the large lattice mismatch (∼4%) between the GaAs epilayer and the silicon substrate. These defects can act as nonradiative recombination centers that can degrade the optical and electrical properties of the epitaxially grown GaAs. For this reason, it is important to optimize epilayer growth conditions in order to minimize resulting dislocation densities. The purpose of this paper is to provide an indication of the quality of the epitaxially grown GaAs layers by using transmission electron microscopy (TEM) to examine dislocation type and density as a function of various growth conditions. In this study an intermediate Ge layer was used to avoid nucleation difficulties observed for GaAs growth directly on Si substrates. GaAs/Ge epilayers were grown by molecular beam epitaxy (MBE) on Si substrates in a manner similar to that described previously.

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