scholarly journals The Errors Recognition and Compensation for the Numerical Control Machine Tools Based on Laser Testing Technology

Open Physics ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 857-862
Author(s):  
Qian Gao ◽  
Pingchuan Zhang
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Laser Interferometer ◽  
Numerical Control ◽  
Control Machine Tool ◽  
Nc Machine Tool ◽  
Testing Technology ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Control Machine

Abstract To improve the accuracy of numerical control machine tools error, this paper studies the application of laser testing technology in numerical control machine tool, and put forward a laser interferometer automatic aiming system which can conduct space error measurement. The system, in the process of the NC machine tool operating, can measure the machine tool space curve through changing the direction of the laser. The principle of laser interferometer and matlab analysis are adopted, through the experiment of laser interference technology in the numerical control machine tool, the law curve of error in NC machine tools is obtained, getting the method of error of NC machine tools. When conducting laser testing error experiment in NC machine tool, the results show that the laser testing can measure aggregated error and thermal error of NC machine tool better, with small control of environment and high accuracy of measurement.

A Reliability Analysis of NC Machine Tools Based on the Weibull Distribution

2015 ◽  
Vol 741 ◽  
pp. 763-767
Author(s):  
Hui Liang Li
Keyword(s):  
Weibull Distribution ◽  
Machine Tool ◽  
Machine Tools ◽  
Interval Estimation ◽  
Point Estimation ◽  
Numerical Control ◽  
Control Machine Tool ◽  
Failure Data ◽  
Nc Machine ◽  
Nc Machine Tools

In this paper, a series of numerical control machine tool truncated failure data collect.The data are assumed to be two parameter weibull distribution and related parameters is obtained and relevant inspection and test of hypothesis, it is concluded that the mathematical model of batch of nc machine tool failure interval time distribution.Relevant indicators to determine the reliability of nc machine tools, machine tool's observations, Machine tool observations, point estimation and interval estimation index value provide a theoretical basis for the research on reliability of machine tool.

Research on the 840D NC Machine Tool Production Process Monitoring and Management

2014 ◽  
Vol 577 ◽  
pp. 421-424
Author(s):  
Le Ping Chu ◽  
De Ming Xiao ◽  
Zai Yu Chen ◽  
Cheng Rong Pian ◽  
Nan Wu ◽  
...  
Keyword(s):  
Machine Tool ◽  
Production Process ◽  
Machine Tools ◽  
Numerical Control ◽  
Nc System ◽  
Nc Machine Tool ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Plc Program ◽  
Status Data

According to the communication principle of 840D numerical control (NC) system and internal data structure, the PLC program is developed to make 840D system state data transmit to the PC with the MPI channels; production status data real-time monitoring system based on 840D NC machine tools is developed, meanwhile, the monitoring and data management for NC machine tool production process status is realized.

Correct Use and Maintenance of Nc Machine Tools

2014 ◽  
Vol 651-653 ◽  
pp. 676-679
Author(s):  
Quan Fang Sun ◽  
Jun Ling Zhang
Keyword(s):  
Control System ◽  
Machine Tool ◽  
Machine Tools ◽  
Numerical Control ◽  
Numerical Control System ◽  
Nc Machine Tool ◽  
Important Index ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Reasonable Use

A country's level of Nc machine tool and ownership, is to measure the level of manufacturing and industrial modernization level of important indicators, is also an important index to measure national comprehensive competitiveness. Therefore, how to better use and maintenance of Nc machine tool is an important issue. This paper introduced how to reasonable use of Nc machine tools, as well as the use of the numerical control system and inspection.

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.

Geometric Error Compensation Methods of Numerical Control Machine Tool

2012 ◽  
Vol 426 ◽  
pp. 239-242
Author(s):  
Xiao Jun Wang ◽  
Xiao Guang Fu
Keyword(s):  
Machine Tool ◽  
Error Compensation ◽  
Reference Value ◽  
Geometric Error ◽  
Numerical Control ◽  
Control Machine Tool ◽  
Nc Machine Tool ◽  
Machining Center ◽  
Compensation Methods ◽  
Nc Machine

In this paper the characteristics of geometric errors is discussed in detail, error compensation methods used in productive practice and relevant examples are given. Finally, the application of error compensation in different situation is discussed according to the characteristics of machining center. The machine accuracy can be improved by error compensation. It has important practical reference value for reasonable use and maintaining of NC machine tool.

scholarly journals Modular design research of computer numerical control machine tools oriented to customer requirements

2020 ◽  
Vol 12 (4) ◽  
pp. 168781402091657
Author(s):  
Fei Li ◽  
Xudong Li ◽  
Hualong Xie
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Quality Function Deployment ◽  
Modular Design ◽  
Computer Numerical Control ◽  
Mapping Method ◽  
Numerical Control ◽  
Control Machine Tool ◽  
Control Machine ◽  
Customer Demands

In order to study the modular design of computer numerical control machine tools oriented to customer demands, the customer demand information model was established based on rough analytic hierarchy process and information entropy by analyzing and transforming customer demands. Based on the domain mapping method of axiomatic design and quality function deployment integration, the product function model and structure model of computer numerical control machine tools are established. Based on fuzzy clustering analysis, the module division of computer numerical control machine tools is studied, and the dynamic clustering diagram of computer numerical control machine tools is formed with MATLAB as the operating environment. Based on Technique for Order Preference by Similarity to Ideal Solution method, the scheme of computer numerical control machine tools module division is evaluated. Taking the horizontal computer numerical control machine tool products of Shenyang Machine Tool Group as an example, the module division is carried out. The example design and the result analysis prove that the module division system is very effective and fast.

Networked Connection of NC Machine Tools Based on MTConnect

2013 ◽  
Vol 418 ◽  
pp. 229-233 ◽  
Author(s):  
Tong Che ◽  
Ri Liang Liu
Keyword(s):  
Machine Tool ◽  
Data Acquisition ◽  
Machine Tools ◽  
Technical Standard ◽  
Nc Machine Tool ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Core Components ◽  
The Difference ◽  
Data Request

MTConnect is a technical standard recently proposed to facilitate the organized retrieval of process information mainly from numerically controlled machine tools. In this paper, core components such as agent, client, adapter etc are overviewed. Considering the difference in manufacturing devices openness and capabilities, different application schemes of agent and adapter are designed according to MTConnect protocol. Agent is designed for data acquisition in different situations and different ways to use Adapters are mainly discussed. Finally, the client, a software function in the application is developed by using C#. And the application is applied to a NC machine tool. In terms of data request, collecting, transmission and detection from a working NC machine tool, the proposed architecture in this paper is verified successfully.

Research on Roundness Error Measurement and Separation Method of NC Machine Tools

2013 ◽  
Vol 336-338 ◽  
pp. 988-994
Author(s):  
Sheng Hua Xiang ◽  
Hai Feng Lin
Keyword(s):  
Machine Tool ◽  
Error Detection ◽  
Machine Tools ◽  
Detection Methods ◽  
Error Source ◽  
Roundness Error ◽  
Nc Machine Tool ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Tool Motion

This paper first introduces the trajectory mode of the each error source in detection the roundness error of NC machine tool. The error separation algorithm is derived according to the relationship between the various error sources and the machine tool motion trajectory. Based on the two testing link under different condition, comparing the test results under two testing conditions, the main error source of NC machine tools is further analyzed. According to the merits and demerits of the two kinds of detection methods, the different round error detection method can be chosen under different occasions.

Reliability Assessment of Numerical Control Machine Tools Using Weibull Mixture Models

2011 ◽  
Vol 181-182 ◽  
pp. 161-165 ◽  
Author(s):  
Zhi Ming Wang ◽  
Jian Guo Yang
Keyword(s):  
Machine Tool ◽  
Mixture Models ◽  
Machine Tools ◽  
Information Criterion ◽  
Numerical Control ◽  
Single Model ◽  
Weibull Models ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Mean Square Errors

Weibull distribution is one of the most widely used model in reliability analysis of NC machine tools. In order to assess the reliability of NC machine tool, Generalized Expectation Maximization (GEM) algorithm is used to estimate parameters of mixture Weibull models. Akaike information criterion (AIC) and Bayesian information criterion (BIC) are used as comprehensive criteria to select the number of subpopulations of mixture models. The results show that mixture models are more suitable to assess reliability of NC machine tools than that of single model. Root mean square errors (RMSE) of mixture models reduce by 87.5% than that of single model. Reliability evaluation results of machine tool, such as MTBF etc., are given.

Study on the dynamic coupling characteristics of 3PTT-2R numerical control serial–parallel machine based on singular constraints and position coupling factors

2015 ◽  
Vol 231 (9) ◽  
pp. 1628-1645
Author(s):  
Yun Cai ◽  
Bangcheng Zhang ◽  
Yu Yao
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Complex Surface ◽  
Numerical Control ◽  
Dynamics Model ◽  
Dynamic Coupling ◽  
Control Machine Tool ◽  
Working Space ◽  
Coupling Factors ◽  
Control Machine

The dynamic coupling problem for the self-designed “3 parallel ∪ 2 series” mixed-type numerical control machine tool is studied based on the singular constraints and position coupling factors in order to ensure that the machine can have better dynamic characteristics and a higher quality of parts during the process of machining complex surface. This article puts forward a method based on singular constraints and the coupling factor. A whole dynamic coupling model of series and parallel mechanism is established and the coupling factors are determined. Numerical and parameter simulations of mechanism are analyzed and the real working space is obtained. And this article takes the simulation of the process of machining complex part and the force of the machine tool. The simulation results show that the established dynamics model is credible and reliable on the basis of considering singular constraints and position coupling factors. It is proved that the simulation data can correspond to the established model and the situation of force and kinematic suits the working mechanism. The cutting experiment of complex surface parts was took and the machine tool was run more smoothly and faster than the conventional machine tools. The velocity of the machine is regular and circular and there are no kinematic singularity data on the machine’s trajectory. The trajectory of the tool is in the working space completely and the accuracy of the part is good. The surface roughness results show that the kinematics accuracy of the machine tool is good. The interference fringe results show that the force of the machine tool is uniform. As there is no singular coupled vibration and collision, it is proved that the theoretical analysis is correct. The dynamics model of 3PTT serial and parallel mechanism is complete in this article. And the working space of the mechanism is obtained on the base of analysis of the singular constraints and position coupling factors. The article has carried out the dynamic simulation and processing experimental verification. Not only the method and process of this article was solved by dynamics coupling problem of 3PTT-2R numerical control machine tool actively, real-time and effectively, but also it was laid a foundation for accurate control of numerical control machine tools.

Sign in / Sign up

Export Citation Format

Share Document