Schärfprozess beim Doppelseitenplanschleifen/Sharpening process during double face grinding - Influencing factors for sharpening in double face grinding with planetary kinematics

2020 ◽  
Vol 110 (06) ◽  
pp. 393-398
Author(s):  
Linus Lichtschlag ◽  
Eckart Uhlmann
Keyword(s):  
Influencing Factors ◽  
Scientific Investigation ◽  
High Quality ◽  
Grinding Processes ◽  
Surface Profiles ◽  
Face Grinding

Die Herstellung der Schneidfähigkeit der Schleifwerkzeuge bildet neben der Erzeugung ebener Schleifbelagsprofile die Grundlage effizienter und produktiver Schleifprozesse beim Doppelseitenplanschleifen mit Planetenkinematik. Zur wissenschaftlichen Durchdringung des meist erfahrungsbasiert ausgelegten, komplexen Schärfprozesses werden potenzielle Einflussgrößen und deren Effekte auf das Schärfergebnis systematisch analysiert.   The formation of the cutting ability of the grinding tools, in addition to the generation of flat grinding surface profiles, is the basis for high-quality and productive grinding processes in double face grinding with planetary kinematics. For the scientific investigation of the complex sharpening process, which are usually based on experience, potential influencing variables and their effects on the sharpening result are systematically analysed.

scholarly journals Analysis of influencing factors for the dressing process in double side face grinding

2021 ◽  
Author(s):  
Eckart Uhlmann ◽  
Linus Lichtschlag
Keyword(s):  
Grain Size ◽  
Tool Wear ◽  
Influencing Factors ◽  
Scientific Data ◽  
Speed Ratio ◽  
Workpiece Surface ◽  
Principal Influence ◽  
Side Face ◽  
Face Grinding ◽  
Wear Condition

AbstractIn grinding, the design of the dressing process is an essential part of work preparation and restoration of the grinding wheel’s profile and cutting ability. In contrast to most grinding processes, the choice of dressing parameters in double face grinding with planetary kinematics has so far only been experience-based. As a consequence, the dressing process causes a higher degree of tool wear than the machining of the workpieces. A focused design of the dressing process based on a scientific data could help to improve the ecological and the economic efficiency by reducing tool wear and the amount of dressing tools used. In this paper, methods for determining the wear condition and the result of the dressing process, including macro- and microscopic characteristic are presented. This includes a correlation analysis between parameters of wear characteristics and workpiece surface quality. Furthermore, technological investigations are carried out in order to systematically limit the main influencing factors on the dressing process. As a result, the parameters dresser grain size dgd, rotational speed ratio nld and the machined dresser height ∆hd are identified as significant for dressing. The knowledge about their principal influence on the dressing result could provide the basis for further research.

scholarly journals Influencing factors for high quality care on postpartum haemorrhage in the Netherlands: patient and professional perspectives

2015 ◽  
Vol 15 (1) ◽  
Author(s):  
Mallory D. Woiski ◽  
Evelien Belfroid ◽  
Janine Liefers ◽  
Richard P. Grol ◽  
Hubertina C. Scheepers ◽  
...  
Keyword(s):  
The Netherlands ◽  
Influencing Factors ◽  
Postpartum Haemorrhage ◽  
Quality Care ◽  
High Quality ◽  
High Quality Care ◽  
Professional Perspectives

Current Situation of the Study on Oxidative Stability of Biodiesel

2014 ◽  
Vol 887-888 ◽  
pp. 484-487
Author(s):  
Hong Jun Ni ◽  
Lei Chen ◽  
De Qin She ◽  
Yin Nan Yuan
Keyword(s):  
Oxidative Stability ◽  
Influencing Factors ◽  
Oxidation Stability ◽  
Environmentally Friendly ◽  
Quality Criteria ◽  
Evaluation Methods ◽  
Current Situation ◽  
High Quality

As a high quality alternative of fossil diesel, biodiesel is widely concerned at domestic and abroad for its environmentally friendly and renewable. Oxidation stability is one of the important properties of biodiesel, which is also one of the quality criteria in storing and using. The oxidative mechanism and the influencing factors of Oxidation stability, oxidation stabilitys evaluation methods and the application of biodiesel antioxidants were reviewed. Then the direction of oxidation stability is put forward.

IMPROVEMENT OF THE SURFACE ROUGHNESS OF LaAlO3 SUBSTRATE BY DEPOSITING ANOTHER LAYER OF LaAlO3

1993 ◽  
Vol 07 (11) ◽  
pp. 743-746
Author(s):  
YONGJUN TIAN ◽  
HUIBIN LU ◽  
SHIFA XU ◽  
DAFU CUI ◽  
ZHENHAO CHEN ◽  
...  
Keyword(s):  
Thin Films ◽  
Surface Roughness ◽  
Laser Ablation ◽  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
High Quality ◽  
Surface Profiles ◽  
Deposited Films

LaAlO 3 thin films have been deposited on (100) LaAlO 3 substrates by pulsed laser ablation. The deposited films showed the (h00) preferential orientations. Surface profiles indicated that the surface roughness of the films decreased with the increase of the oxygen partial pressure. High quality superconducting YBa 2 Cu 3 O 7 thin films have been successfully deposited by laser ablation on the (100) LaAlO 3 substrates with the LaAlO 3 layers.

The Connotative Structure of High Quality Connections and Its Influencing Factors —The Role of Awe and Gratitude

2021 ◽  
Vol 3 (6) ◽  
pp. 560-572
Author(s):  
Yu Xuan ◽  
Zhang Jie ◽  
Ma Ke ◽  
Zhang Yue ◽  
Yu Qiushi
Keyword(s):  
Influencing Factors ◽  
High Quality

The Experimental Investigation of Face Grinding of Al2024/SiCp with Electroplated Diamond Wheel

2008 ◽  
Vol 392-394 ◽  
pp. 613-618
Author(s):  
D.P. Li ◽  
Ying Xue Yao ◽  
Z.J. Yuan
Keyword(s):  
Residual Stress ◽  
Experimental Investigation ◽  
Normal Force ◽  
Tangential Force ◽  
Diamond Wheel ◽  
Grinding Force ◽  
Grinding Forces ◽  
High Quality ◽  
The Face ◽  
Face Grinding

In this paper experiments of the face grinding of Al2024/SiCp through the use of electroplated diamond wheel were carried out. The results indicated that high quality processed surface was achieved by face grinding machining, under the experiment conditions of this paper, the surface roughness was between Ra0.185 μm and Ra0.512μm, and the residual stress of processed surface was compressive stress. Grinding parameter had little effect on tangential force and normal force. Axial grinding force increased with the increasing of grinding depth and was stronger than grinding forces in other two directions.

Study on influencing factors and mechanism of high-quality tungsten carbide nanopowders synthesized via carbothermal reduction

2021 ◽  
Vol 867 ◽  
pp. 158959
Author(s):  
Qianyu Wang ◽  
Haoyang Wu ◽  
Mingli Qin ◽  
Ziyi Li ◽  
Baorui Jia ◽  
...  
Keyword(s):  
Tungsten Carbide ◽  
Influencing Factors ◽  
Carbothermal Reduction ◽  
High Quality

scholarly journals Research on High-Quality Development Efficiency and Total Factor Productivity of Regional Economies in China

2021 ◽  
Vol 13 (15) ◽  
pp. 8287
Author(s):  
Xiangyu Hua ◽  
Haiping Lv ◽  
Xiangrong Jin
Keyword(s):  
Total Factor Productivity ◽  
Influencing Factors ◽  
Distance Functions ◽  
Spatial Data Analysis ◽  
Significant Feature ◽  
Eastern Region ◽  
Quality Development ◽  
Regional Economies ◽  
Factor Productivity ◽  
High Quality

Different from the developmental mode of western developed countries, China’s economy has changed from a stage of high-speed growth to a stage of high-quality development, where the people’s growing needs for better lives can be met, embodying this new concept of development. The aim of our study is to evaluate the high-quality development efficiency and total factor productivity (TFP) of regional economies in China, and to explore the characteristics of spatial-temporal pattern evolution and their influencing factors. By using the slacks-based measure of directional distance functions (SBM-DDF) model, based on the undesirable output perspective, the high-quality development efficiency and TFP of regional economies in China, from 2000 to 2018, are evaluated in this paper. The exploratory spatial data analysis (ESDA) and Tobit models are then used to identify the spatial-temporal correlation patterns and influencing factors of high-quality development efficiency and TFP. The key results show the following: (1) from 2001 to 2018, the greatest high-quality development efficiency and TFP belonged to China’s eastern region and the least to its central region. (2) U and inverted-U trend lines show that high-quality development efficiency has significant regional difference in the east–west direction, presenting a significant feature of spatial imbalance. (3) Government, urbanization rate, and marketization level play a positive role in their impact of TFP, whereas financial development, infrastructure, foreign direct investment, and capital labor ratio play a negative one.

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