Structural Characteristic Analysis on the Hydrostatic Guide Way and Feeding System of a High-Precision Centerless Grinder for Machining Ferrules

2004 ◽  
Vol 28 (7) ◽  
pp. 896-903 ◽  
Keyword(s):  
Structural Characteristic ◽  
High Precision ◽  
Feeding System ◽  
Characteristic Analysis

scholarly journals Design and characteristic analysis of vibration feeding system for coal-gas dust-removal medium

Clean Energy ◽  
2020 ◽  
Author(s):  
Bing Liu ◽  
Lixin He ◽  
Xianglong Zhao ◽  
Qiang Qin ◽  
Yi Guo
Keyword(s):  
Control Unit ◽  
Dust Removal ◽  
Feeding System ◽  
Characteristic Analysis ◽  
Coal Gas ◽  
Measurement Variation ◽  
Gasification Process ◽  
Valve Opening ◽  
Design Requirements ◽  
Design Factors

Abstract A vibration feeder is a piece of equipment for rationing and conveying powder, particle and block materials. In order to test the regeneration performance of de-dusting medium for high-temperature coal gas, a set of de-dusting medium-feeding systems was designed quantitatively. The de-dusting medium-feeding system is used in the gasification process for cleaning coal gas. The system is mainly composed of a hopper unit, control unit and feeding unit. In order to optimize the feeding stability of the coal-gas dust-removal medium vibration feeding system, the setting and scope of the following design factors and operating factors are investigated. Specifically, it includes the influence of gate-valve-opening adjustment of the control unit on the feeding stability of a vibrating feeding system; the influence of the gap size of the dipleg of the control unit on the feeding sensitivity of the vibration system; the influence of the particle size of the de-dusting medium on the operating range of the vibrating feeding system; the influence of the digitization of the working-current indicator of electromagnetic vibrating feeders on measurement variation and the process variation of a vibration feeding system. This vibration feeding system can realize the function of precise and quantitative feeding of the de-dusting medium, which can meet the design requirements of subsequent experimental research.

Design and characteristic analysis of an aerostatic decoupling table for microelectronic packaging

2017 ◽  
Vol 232 (6) ◽  
pp. 1079-1090 ◽  
Author(s):  
Cunman Liang ◽  
Fujun Wang ◽  
Qingguo Yang ◽  
Yanling Tian ◽  
Xingyu Zhao ◽  
...  
Keyword(s):  
High Precision ◽  
Optimization Design ◽  
Micro Electro Mechanical System ◽  
Navier Stokes ◽  
Orifice Diameter ◽  
Precision Positioning ◽  
Characteristic Analysis ◽  
Navier Stokes Equation ◽  
Decoupling Mechanism ◽  
Aerostatic Bearings

This paper presents a novel 2-DOF XY table with high-precision positioning to improve the efficiency and precision of micro-electro-mechanical system packaging. The XY table, which is supported by aerostatic bearings to realize high-precision positioning motion, is directly driven by two linear voice coil actuators. The motion decoupling between the X-and Y-axes is realized through a novel aerostatic decoupling mechanism, by which the mass and inertia of motion parts are reduced significantly. The mechanical structure of the XY table is designed and the decoupling mechanism is studied. Based on the Navier–Stokes equation, the influences of orifice diameter and lubrication gap on the carrying capacity as well the static stiffness of the aerostatic bearings are analyzed. The parameters of the aerostatic bearings are determined by single factor method. Using the finite element method, the static, modal, and transient analyses of the developed positioning table are carried out to investigate the characteristics of the positioning table. The results show that the positioning table provides good performance and can also provide important information for the optimization design and control of this kind of the positioning table.

Thermal Characteristic Analysis on a High Precision Turning Center’s Headstock

2013 ◽  
Vol 655-657 ◽  
pp. 305-309
Author(s):  
Yao Man Zhang ◽  
Ren Jun Gu ◽  
Jia Liang Han
Keyword(s):  
High Precision ◽  
Error Compensation ◽  
Thermal Characteristic ◽  
Thermal Characteristics ◽  
Thermal Error ◽  
Linear Regression Method ◽  
Characteristic Analysis ◽  
Precision Turning ◽  
Turning Center ◽  
Thermal Error Compensation

The performances of the high precision turning center will be influenced by the thermal characteristics of the headstock seriously, and accurately predict thermal characteristics of the headstock are helpful to improve the design level. The headstock of a high precision turning center produced by some plant has been regarded as the research objects of the paper. First the steady temperature distribution and thermal deformation of the headstock were calculated based the finite element analysis models of the headstock. Then the temperature sensitive points of the headstock were obtained by using the grey incidence analysis method. Finally the thermal error compensation model was built by using multiple linear regression method. The study lays a foundation for the thermal error compensation of the headstock of the turning center.

scholarly journals High precision NC lathe feeding system rigid-flexible coupling model reduction technology

2017 ◽  
Author(s):  
He Xuan ◽  
Qingsong Hua ◽  
Lianjun Cheng ◽  
Hongxin Zhang ◽  
Qinghai Zhao ◽  
...  
Keyword(s):  
Model Reduction ◽  
High Precision ◽  
Coupling Model ◽  
Feeding System ◽  
Flexible Coupling

The Passenger Transfer Characteristic Analysis of Shenyang Subway Based on Comparative Analysis Method

2014 ◽  
Vol 716-717 ◽  
pp. 484-487
Author(s):  
Xiao Qian
Keyword(s):  
Comparative Analysis ◽  
Transfer Characteristic ◽  
Survey Method ◽  
Feeding System ◽  
Analysis Method ◽  
Characteristic Analysis ◽  
Transit System ◽  
Dominant Position ◽  
Contrast Method ◽  
Urban Rail

In order to better play an important role in the subway transit system to achieve its dominant position, it is necessary to establish a good feeding system and interface transfer system. On the basis of the current study urban passenger transfer characteristics, the study of urban rail transport passenger transfer is essential. Shenyang Subway Line 1 eased the pressure on the ground transportation of city to a large extent from the completion of construction to be put into use. In this paper, inquirer survey method, induction contrast method and comparative analysis method are selected to investigate the traffic of the each site in Shenyang subway lines, and analyze the characteristics of the passenger transfer, so that the subway planning operator can be gradually improved and the operational organization can be better guided.

Thermal Characteristic Analysis on the Headstock of a High Precision CNC Machine Tool

2012 ◽  
Vol 201-202 ◽  
pp. 157-161
Author(s):  
Yao Man Zhang ◽  
Jia Liang Han ◽  
Ren Jun Gu
Keyword(s):  
Machine Tool ◽  
High Precision ◽  
Optimization Design ◽  
Thermal Characteristic ◽  
Spindle Assembly ◽  
Cnc Machine ◽  
Analysis Model ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Precision Machine

The performances of the precision machine tool will be influenced by its thermal characteristics seriously, and accurately predict the thermal characteristic of the key component of the machine tool is helpful to improve the design level. The headstock of a high precision CNC lathes has been regarded as the research objects, and the thermal properties and its influence on the performance of the machine tool are studied. Finite element analysis model of the headstock has been constructed, and the simulation calculations of the steady temperature field distribution and thermal equilibrium time of the headstock are calculated, and then the analysis to identify the thermal deformation trends of the spindle assembly and the heat distortion of the headstock are also been done. Some of the key factors that have significant influence on the thermal characteristic of the high precision machine tools are also studied. The analysis reveals that the performances of the machine tool will be influenced by the hot asymmetric, the study lays a foundation for the optimization design and thermal error compensation of the spindle assembly.

Sign in / Sign up

Export Citation Format

Share Document