Research of high performance AC servo feed system for NC machine tool

2010 ◽  
Author(s):  
Tao Zhao ◽  
Mulan Wang ◽  
Chao Pan ◽  
Youbin Wang
Keyword(s):  
Machine Tool ◽  
High Performance ◽  
Feed System ◽  
Nc Machine Tool ◽  
Ac Servo ◽  
Nc Machine

Numerical Control Machine Tool Motion Simulation and Analysis of Parts of the Crawling Phenomenon

2014 ◽  
Vol 971-973 ◽  
pp. 592-595 ◽  
Author(s):  
Ming Yin ◽  
Wen Tong Cheng ◽  
Li Juan Bai ◽  
Lan Lan Guo
Keyword(s):  
Machine Tool ◽  
Numerical Control ◽  
Mechanical Transmission ◽  
Feed System ◽  
Control Machine Tool ◽  
Nc Machine Tool ◽  
Dynamic Friction Coefficient ◽  
Damped Oscillations ◽  
Nc Machine ◽  
Tool Motion

NC machine creeping failure usually occurs in the mechanical part and feed servo system of NC machine tool feed system, because of low speed creeping phenomenon often depends on the characteristics of mechanical transmission parts. Crawling is generally due to transmission of machine tool stiffness is insufficient, friction and dynamic friction coefficient difference and friction damped oscillations caused by too small. This paper establishes the physical model and the mathematical model, through theoretical analysis and numerical simulation of machine movement components that crawl main reason, put forward to prevent the moving parts of the main measures of creeping.

The Influence and Suppression of Nonlinear Friction

2013 ◽  
Vol 753-755 ◽  
pp. 1760-1763
Author(s):  
Jian Jun Yang ◽  
Qin Wu ◽  
Chun Li Lei ◽  
Rui Cheng Feng
Keyword(s):  
Machine Tool ◽  
Control Method ◽  
Nonlinear Friction ◽  
Feed System ◽  
Positioning Accuracy ◽  
Nc Machine Tool ◽  
Nc Machine ◽  
Main Factors ◽  
And Control

Direct at NC machine tool feed system, the article analyzed the influence of the nonlinear friction at each motion joint, and points out that the nonlinear friction are the main factors that influence the positioning accuracy of the feed system. The article have discussed the methods for effectively compensation and controlling of the nonlinear friction respectively from two aspects of flutter compensation and predictly controlling the nonlinear friction, and proved the correctness of the compensation and control method that is proposed in this paper.

Fuzzy Evaluation and Modeling of Positioning Error of NC Machine Tool Feed System

2014 ◽  
Vol 536-537 ◽  
pp. 1607-1611
Author(s):  
Ming De Duan ◽  
Jia Jia Gu ◽  
Kang Hua Liu ◽  
Xiao Xiao Ji ◽  
Yu Ping Wang
Keyword(s):  
Mathematical Model ◽  
Machine Tool ◽  
High Speed ◽  
Evaluation Method ◽  
Fuzzy Comprehensive Evaluation ◽  
Fuzzy Evaluation ◽  
Positioning Error ◽  
Feed System ◽  
Nc Machine Tool ◽  
Nc Machine

With the experimental data of positioning precision of high-speed precision NC machine tool, a linear mathematical model of positioning error is established. Based on gray model and Cauchy problem formula, a nonlinear mathematical model is also established. The two models are evaluated by fuzzy comprehensive evaluation method to find the optimal prediction model. Compensated with a selection of positioning error compensation model, the confidence interval of 0.95 of positioning error is less than 3μm, meets the design requirements of the machine tool.

Model Research on Special Metal Cutting NC Machine Tool

2007 ◽  
Vol 10-12 ◽  
pp. 806-811
Author(s):  
Tong Zhao ◽  
P.Q. Ye ◽  
H. Zhang ◽  
X.K. Wang
Keyword(s):  
Machine Tool ◽  
Metal Cutting ◽  
Relation Module ◽  
Nc Machine Tool ◽  
Model Research ◽  
Unit Model ◽  
Proposed Model ◽  
Control Research ◽  
Function Unit ◽  
Nc Machine

In this paper the model of special metal cutting NC machine Tool is presented, which consists of a base module, an overall control module, particular functional modules as well as a relation module. Each module involved in aforementioned model will be composed by software, hardware and mechanical parts, so as to combine the convergence of the ideas of modularization and mechanical-electrical integration into current understanding of special NC machine tool through the proposed model. Specially, the relation module is introduced to deal with the linking among all the other modules. The presented model aims to broaden the perspective of machine designers intending to increase the efficiency in machine design. By giving the so-called function unit model a novel modeling approach is delivered to carry out control research of special metal cutting NC machine, which is followed by the formalization description method presented as a possible abstraction methodology towards the efficient description and identification of special metal cutting NC machine tool.

The Coupling Characteristic of HSK Tool-Holder/Spindle Interface for High-Speed NC Machine Tool

2014 ◽  
Vol 590 ◽  
pp. 121-125 ◽  
Author(s):  
Wen Kai Jie ◽  
Jian Chen ◽  
Deng Sheng Zheng ◽  
Gui Cheng Wang
Keyword(s):  
Machine Tool ◽  
Rotational Speed ◽  
High Speed ◽  
Nonlinear Finite Element Method ◽  
High Rotational Speed ◽  
Tool Holder ◽  
Nc Machine Tool ◽  
Machine Tool Accuracy ◽  
Nc Machine ◽  
Coupling Characteristic

The coupling characteristic of the tool-holder/spindle interface in high speed NC machine has significant influence on machine tool accuracy and process stability. With the example of HSK-E63, based on nonlinear finite element method (FEM), the coupling characteristic of the tool-holder/spindle interface under high rotational speed was investigated, the influence of interference, clamping force and rotational speed on the contact stress and the sectional area of clearance were discussed in detail. The results can be used as theoretical consideration to design and optimize the high speed tool-holder/spindle interface.

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