Dynamics Characteristics for Contact Surface of Machine Tool

2014 ◽  
Vol 538 ◽  
pp. 91-94
Author(s):  
Wei Ping Luo
Keyword(s):  
Machine Tool ◽  
Dynamic Characteristics ◽  
Contact Surface ◽  
Dynamic Performance ◽  
Virtual Prototype ◽  
Prototype Model ◽  
Ansys Software ◽  
Dynamic Analyses ◽  
Contact Surfaces

A virtual prototype model of Machine Tool has been constructed by using the Pro/E software and the ANSYS software. Considering the effects of contact surfaces, dynamic analyses of Machine Tool are studied. The effects of contact surfaces on the dynamic characteristics of machine tool are studied. So that the purpose predicting and evaluating synthetically the machine tool dynamic performance without a physical sample can be achieved.

Analysis and Optimization of the Static and Dynamic Characteristics of Head Frame

2011 ◽  
Vol 418-420 ◽  
pp. 2055-2059 ◽  
Author(s):  
Yu Lin Wang ◽  
Na Jin ◽  
Kai Liao ◽  
Rui Jin Guo ◽  
Hu Tian Feng
Keyword(s):  
Machine Tool ◽  
Dynamic Characteristics ◽  
Maximum Stress ◽  
Dynamic Performance ◽  
Mode Shapes ◽  
Cnc Machine ◽  
Static And Dynamic Characteristics ◽  
Maximum Deformation ◽  
Improvement Measures ◽  
Optimal Measure

The head frame is a key component which plays a supportive and accommodative role in the spindle system of CNC machine tool. Improving the static and dynamic characteristics has profound significance to the development of machine tool and product performance. The simplified finite element modal is established with ANSYS to carry out the static and modal analysis. The results showed that the maximum deformation of the head frame was 0.0066mm, the maximum stress was 3.94Mpa, the deformation of most region was no more than 0.0007mm, which all verified that the head frame had a good stiffness and deforming resistance; several improvement measures for dynamic performance were also proposed by analyzing the mode shapes, and the 1st order natural frequency increased 7.33% while the head frame mass only increased 1.58% applying the optimal measure, which improved the dynamic characteristics of the head frame effectively.

Dynamic Characteristics Analysis and Finite Element Simulation of Steel–BFPC Machine Tool Joint Surface

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Jiaxing Shen ◽  
Ping Xu ◽  
Yinghua Yu
Keyword(s):  
Neural Network ◽  
Finite Element ◽  
Machine Tool ◽  
Finite Element Simulation ◽  
Dynamic Characteristics ◽  
Dynamic Performance ◽  
Joint Surface ◽  
Element Simulation ◽  
Neural Network Prediction ◽  
Network Prediction

Abstract The dynamic performance of the steel–Basalt fiber polymer concrete (BFPC) machine tool joint surface (referred to as the joint surface) has a significant impact on the overall BFPC machine tool performance; however, its dynamic characteristics remain unclear. In order to solve this problem, the influence of roughness and surface pressure on the dynamic performance of joint surface was studied experimentally, and a neural network prediction model for the dynamic performance of the joint surface was established. A BFPC bed was designed and manufactured, and BFPC bed’s dynamic performance was tested experimentally. The finite element simulation model of BFPC bed was established with equivalent spring-damper element. The BFPC bed’s dynamic performance without considering the influence of the joint surface and considering the influence of the joint surface was studied separately. The results show that the maximum error of the natural frequency of the BFPC bed was 6.937% considering the influence of the joint surface, which was much lower than the error without considering the influence of the joint surface. The maximum amplitude error of the X-axis and Z-axis acceleration of the BFPC bed was 6.917% and 5.15%, which were much smaller than the error without considering the influence of the joint surface. It proves the accuracy of the neural network prediction model for dynamic performance of the joint surface and the validity of the finite element simulation method for the joint surface. It provides theoretical support for the design analysis of BFPC machine tool.

EVALUATION OF DYNAMIC PERFORMANCE OF MAGENETO-RHEOLOGICAL DAMPER BY VIRTUAL PROTOTYPE TECHNOLOGY

2005 ◽  
Vol 19 (07n09) ◽  
pp. 1542-1548 ◽  
Author(s):  
BAOLIN HOU ◽  
JIONAG WANG
Keyword(s):  
Dynamic Characteristics ◽  
Dynamic Performance ◽  
Mr Damper ◽  
Control Policy ◽  
Virtual Prototype ◽  
Control Policies ◽  
The Road ◽  
Full Vehicle ◽  
Road Profile ◽  
Virtual Prototype Technology

Numerical dynamic simulation of a full vehicle incorporating a magneto-rheological damper in the primary suspension is studied using the package ADAMS and SIMULINK. The full vehicle model is built under ADAMS. The interaction between the tire and the road profile is simulated using the ADAMS/TIRE capabilities. The UA tire model is used to model the dynamic characteristics of the tires. A 3-D road profile model is built based on the spatial power spectrum density of a random road profile. In order to model the dynamic characteristics of the primary suspension MR damper, a non-parametric model of an MR damper is proposed which can conveniently be incorporated into the vehicle dynamic model. Two kinds of control policies, a common skyhook and the so-called non-jerk skyhook, are adopted to control the current applied to the MR damper. The simulation results imply that either one of the two skyhook control policies can obtain a good compromise between so-called "soft damping" and "hard damping", and non-jerk skyhook control policy can curb some higher frequency components which are observed in the acceleration response of the chassis. This study demonstrates that virtual prototype technology is an effective approach for investigating the dynamic behavior of MR dampers for complex systems.

Virtual Prototype Modeling and Starting Method of Belt Conveyor

2011 ◽  
Vol 148-149 ◽  
pp. 879-882 ◽  
Author(s):  
Dong Mei Du ◽  
Hong Li ◽  
Chun Shui Zhu ◽  
Qing He
Keyword(s):  
Large Scale ◽  
Dynamic Performance ◽  
Solid Material ◽  
Virtual Prototype ◽  
Actual Condition ◽  
Prototype Model ◽  
Belt Conveyor ◽  
Long Distance ◽  
Dynamic Tension ◽  
Development Costs

Large scale belt conveyor is a key device to transport bulk-solid material for long distance. It is necessary to build rational virtual prototype model, analysis dynamic performance of belt conveyor. Comparing with traditional physical prototyping and experimental way, shorter design cycle and lower development costs will be got by using virtual prototype. It is helpful to choose the best design which is rational in technique, safe and reliable in running, feasible in economy. Considered actual working conditions, a virtual prototype model is built and validated by dynamics analysis. Three starting methods including direct starting mode, traditional Harrison method and soft starting are compared. The simulation results of virtual prototype show that direct starting method will lead to higher dynamic tension extreme value and larger fluctuation, dynamic tension is significantly reduced with the traditional Harrison method, and the average dynamic tension of soft starting consider the actual condition is dropped to minimum and the whole system is more stable.

scholarly journals Study of the reversing mechanism of wetting agent adding device based on Adams simulation

2018 ◽  
Vol 189 ◽  
pp. 08003
Author(s):  
Guijun Gao ◽  
Qiang Dong
Keyword(s):  
Dynamic Characteristics ◽  
Coal Mine ◽  
3D Model ◽  
Virtual Prototype ◽  
Wetting Agent ◽  
Prototype Model ◽  
Model Parameters ◽  
Optimized Design ◽  
Adams Simulation ◽  
Simulation Results

This paper proposed a hydraulically-driven adjustable concentration of wetting agent adding device applied in underground of coal mine. A 3D model of the reversing mechanism of adding device was built by using Solidworks, and then imported to the Adams to build a virtual prototype model. The reversing mechanism was optimized by setting the model parameters, adding constraints and drive. The dynamic characteristics of the reversing mechanism were analysed under different length l of the driven rocker arm. The results show that the value of l (l=17mm) can realize automatic reversing. The simulation results provide a basis for trial-manufacture of physical prototyping and optimized design.

Numerical Analysis on Transmission Characteristics of Stephenson’s Six-Bar Punching Mechanism with Servo Input

2011 ◽  
Vol 86 ◽  
pp. 623-628 ◽  
Author(s):  
Jian Guo Hu ◽  
You Song Sun ◽  
Yong Qi Cheng ◽  
Wei Ping Ruan
Keyword(s):  
Numerical Analysis ◽  
Dynamic Characteristics ◽  
Production Efficiency ◽  
Virtual Prototype ◽  
Numerical Results ◽  
Prototype Model ◽  
Transmission Characteristics ◽  
Output Link ◽  
Manufacturing Costs ◽  
Large Load

Punching mechanisms with servo input are typical variable-input controllable mechanisms. By means of extending the output link infinitely, the Stephenson Ⅲ six-bar linkage is evolved into a six-bar punching mechanism with a slide. A virtual prototype model of this novel punching mechanism was established by using the software ADAMS. The model includes geometry, load and drive, total three sub-models. Based on the model, the kinematic and dynamic characteristics of the slide with variable-input crank motion and instantaneous large load were simulated. The numerical results showed that the Stephenson’s six-bar punching mechanism had good transmission characteristics, improving the working performances and production efficiency, reducing the manufacturing costs of servo mechanical presses.

Research of Moving Table with Aluminum Foam-Filled Structure

2012 ◽  
Vol 619 ◽  
pp. 164-167
Author(s):  
Ping Xu ◽  
Zhen Xiao ◽  
Hai Nan Tan ◽  
Ying Hua Yu
Keyword(s):  
Machine Tool ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Aluminum Foam ◽  
Dynamic Performance ◽  
Static And Dynamic Characteristics ◽  
Inherent Frequency ◽  
Foam Filled ◽  
High Dynamic ◽  
Iron Material

In order to explore the changes of static and dynamic characteristics of machine tool components in which aluminum foam material was used, the characteristics of the prototype table and filled structure one was analyzed by ANSYS.It is shown that static and dynamic characteristics of machine tool can be improved by using aluminum foam-filled structure.Compared with cast iron material,the inherent frequency of table with aluminum foam-filled structure significantly improved,resonant response amplitude has decreased.It was accord with the requirements in the lightweight and high dynamic performance under the condition of ultra-high speed processing.

An Integrated Joint Dynamics System for Elastically Jointed Structures

1991 ◽  
Author(s):  
Y. Rong ◽  
H. S. Tzou
Keyword(s):  
Dynamic Characteristics ◽  
Dynamic Performance ◽  
Measuring Device ◽  
Joint Friction ◽  
Vibration Data ◽  
Unit Structure ◽  
Joint Dynamics ◽  
Joint Clearances ◽  
Stochastic Simulator ◽  
Vibration Measuring

Abstract The dynamic behavior of elastic joints strongly affect the dynamic performance of a jointed mechanical system. The dynamic contacts introduced by joint clearances create a system with nonlinear characteristics. Special effort needs to be made to study jointed mechanical systems. This paper presents an integrated joint dynamics system, which can be used to predict the dynamic characteristics of a newly designed structure, or to analyze an existing jointed structure. This joint dynamics system can also be applied as a real time monitoring and diagnosis system when it is connected with a vibration measuring device. The joint dynamics system includes: 1) a theoretical model of jointed structures, in which the joint clearance and joint friction effects are considered; 2) a stochastic simulator which is used to generate vibration data and evaluate system dynamic characteristics; 3) a diagnostic monitoring algorithm for vibration state detection; and 4) a forecasting vibration control scheme. The joint dynamics system is applied to the dynamic analysis of a truss-cell unit structure. The results presented in this paper show that the joint dynamics system is effective.

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