scholarly journals Research on Availability Function Deployment for Motorized Spindle based on User Requirement

2021 ◽  
Vol 2133 (1) ◽  
pp. 012031
Author(s):  
Bingkun Chen ◽  
Zhiqiong Wang ◽  
Guixiang Shen
Keyword(s):  
Performance Characteristics ◽  
Weak Links ◽  
Motorized Spindle ◽  
Improvement Strategy ◽  
User Requirement ◽  
Machining Center ◽  
Object Based ◽  
Survival And Development

Abstract Users are the basis for the survival and development of enterprises. Only by understanding user requirement can products have sufficient competitiveness. In this paper, the machining center motorized spindle is taken as the research object. Based on the user requirement, this paper takes the motorized spindle as the research object, and combines the failure performance characteristics to expand the availability function. This method can transform the requirement information into the availability improvement strategy of the motorized spindle weak links, which is an effective method to quickly improve the availability level of the machining center motorized spindle.

Spindle System Dynamic Characteristics Analysis of Vertical Gantry Machining Center

2013 ◽  
Vol 456 ◽  
pp. 286-290
Author(s):  
Hong Bing Huang ◽  
Yong Ming Wang ◽  
Shuai Xia
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Element Model ◽  
Motorized Spindle ◽  
Spindle System ◽  
Machining Center ◽  
Object Based ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis ◽  
The Finite Element Model

With the spindle system of a vertical gantry machining center as the research object, based on the vibration theory and finite element method, the modal analysis of spindle system is studied. Firstly, the finite element models of the mandrel box body and motorized spindle frame of spindle system are established by ANSYS. And then do the modal analysis of singleton in the boundary of free constraint. Lastly, based on the analysis results to establish the finite element model of the whole spindle system and do the modal analysis of the whole system which under constraint condition. The result shows that the swing of motorized spindle frame and motorized spindle sleeve of spindle system are more obvious.

Thermal Error Measurement, Modeling and Compensation for Motorized Spindle and the Research on Compensation Effect Validation

2014 ◽  
Vol 889-890 ◽  
pp. 1003-1008 ◽  
Author(s):  
Yu Qing Fu ◽  
Wei Guo Gao ◽  
Jin Yu Yang ◽  
Qing Zhang ◽  
Da Wei Zhang
Keyword(s):  
Compensation Effect ◽  
Great Influence ◽  
Thermal Characteristics ◽  
Thermal Error ◽  
Shift Function ◽  
Linear Regression Method ◽  
Motorized Spindle ◽  
Verification Method ◽  
Machining Center ◽  
Thermal Error Model

The motorized spindle is a primate part of the machine tool and its thermal characteristics have great influence on the accuracy of the machine tools. The thermal errors of the spindle of a certain type of precision horizontal machining center were measured with PLC acquisition system. By multivariate linear regression method, the axial thermal error model was built. Online real-time error compensation was implemented by applying the FANUC 18i CNC system external machine coordinate system shift function. A verification method was proposed which include three steps: model validation, compensation validation and experimental machining verification. The accuracy of the model was 84.1%, 64.9% and 49.4% respectively. The quantitative analysis results showed the precision was effectively improved and the compensation method was reliable.

scholarly journals Thermal Characteristics Analysis for Motorized Spindle System of CNC Machining Center

2019 ◽  
Vol 257 ◽  
pp. 02003
Author(s):  
Xiaolei Deng ◽  
Xinghui Zhang ◽  
Mucheng Zhang ◽  
Yibo Zhou ◽  
Huan Lin ◽  
...  
Keyword(s):  
Thermal Characteristics ◽  
Thermal Error ◽  
Cnc Machining ◽  
Transfer Coefficients ◽  
Motorized Spindle ◽  
Element Analysis ◽  
Spindle System ◽  
Heat Transfer Coefficients ◽  
Machining Center ◽  
Characteristics Analysis

Based on the comprehensive analysis of the heat sources of the motorized spindle system, the thermal loads, including the heat generation of bearing friction and the electromagnetic loss of the built-in motor, are carried out for a machining center motorized spindle system. And then, the convective heat transfer coefficients of the whole spindle system are analyzed. The thermal characteristics of the motorized spindle system are calculated by finite element analysis. The steady state temperature field distribution of the motorized spindle is obtained. It provides some references for improving the thermal characteristics of the motorized spindle and reducing the difficulty of thermal error compensation.

Reformation of Motorized Spindle Based on Composites Machining Center

2014 ◽  
Vol 1049-1050 ◽  
pp. 539-543
Author(s):  
Yun Zhang ◽  
Chao Zhou ◽  
Yi He
Keyword(s):  
Motorized Spindle ◽  
Type Compound ◽  
Machining Center ◽  
Compound Material ◽  
Bridge Type ◽  
Five Axis

This text passes according to the design of the tool machine reformation spindle, to five axis bridge type compound material machining center motorized spindle design reformation, and design to transfer board, finally success apply to engineering.

The Desired Field-Performance Characteristics of New Improved Vaccines for the Developing World

1994 ◽  
Vol 10 (1) ◽  
pp. 65-70 ◽  
Author(s):  
Ciro A. de Quadros ◽  
Peter Carrasco ◽  
Jean-Marc Olivé
Keyword(s):  
Health Care ◽  
Developing Countries ◽  
Field Performance ◽  
Performance Characteristics ◽  
Immunization Programs ◽  
The Past ◽  
Heat Stable ◽  
Disease Reduction ◽  
Survival And Development ◽  
Oral Doses

AbstractAlthough the vaccination initiatives undertaken during the past decade are the cornerstones for protecting the world's children and helping to ensure their survival and development, the vaccines currently being employed may become obstacles for further disease reduction or eradication. Their characteristics complicate or increase the burden on health care infrastructures to maintain or expand vaccine delivery systems. This paper examines an experience with the vaccine technologies that currently are being used by immunization programs in developing countries, illustrating the field problems and obstacles associated with their use. It discusses the advantages and benefits that would accrue if new or improved, heat-stable, multi-antigen vaccines that require only one or two, preferably oral, doses were to become available.

Facing on Green Failure Mode Effects Analysis and Improvement Measures of CNC Machining Center

2014 ◽  
Vol 909 ◽  
pp. 386-390
Author(s):  
Xiu Rong Zhu ◽  
Gui Ping Wang
Keyword(s):  
Failure Mode ◽  
Cnc Machining ◽  
Weak Links ◽  
Fuzzy Evaluation ◽  
Cnc Machine ◽  
Chinese Library Classification ◽  
Mode Effects ◽  
Machining Center ◽  
Improvement Measures ◽  
Cnc Machining Center

In this paper, a analysis method is proposed on failure mode effects of facing on green CNC machining center. And the weak links of CNC machine tool were fund out on Green the reliability combining with the fuzzy evaluation and the reliability failure analysis, and its failure causes were analyzed and the corresponding improvement measures were put forward. It provides a more practical method to research the reliability and green of mechanical and electronic products. Chinese library classification number: TG659

A new type of defect structure in 124-superconducting oxide revealed by HREM

1991 ◽  
Vol 49 ◽  
pp. 1092-1093
Author(s):  
R. Sharma ◽  
B.L. Ramakrishna ◽  
N.N. Thadhani ◽  
D. Hianes ◽  
Z. Iqbal
Keyword(s):  
Shock Wave ◽  
Defect Structure ◽  
Neutron Radiation ◽  
Weak Links ◽  
Defect Structures ◽  
New Materials ◽  
New Type ◽  
Current Densities ◽  
Processing Techniques ◽  
Microstructural Studies

After materials with superconducting temperatures higher than liquid nitrogen have been prepared, more emphasis has been on increasing the current densities (Jc) of high Tc superconductors than finding new materials with higher transition temperatures. Different processing techniques i.e thin films, shock wave processing, neutron radiation etc. have been applied in order to increase Jc. Microstructural studies of compounds thus prepared have shown either a decrease in gram boundaries that act as weak-links or increase in defect structure that act as flux-pinning centers. We have studied shock wave synthesized Tl-Ba-Cu-O and shock wave processed Y-123 superconductors with somewhat different properties compared to those prepared by solid-state reaction. Here we report the defect structures observed in the shock-processed Y-124 superconductors.

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