FBG-based online monitoring for uncertain loading-induced deformation of heavy-duty gantry machine tool base

With the development of modernization, how to implement the unified management and real-time monitoring becomes a key problem. With the requirements of Wuhan Heavy Duty Machine Tool Group Corporation, a CNC online monitoring system based on FANUC and Siemens system has been developed.

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An Online Monitoring, Diagnosis and Control System for Heavy Duty NC Machine Tool

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.157-158.895 ◽

2012 ◽

Vol 157-158 ◽

pp. 895-900

Author(s):

Guang Fei Jia ◽

Jian Ping Xuan ◽

Bo Wu ◽

You Min Hu ◽

Yao Cheng

Keyword(s):

Control System ◽

Machine Tool ◽

Online Monitoring ◽

Optical Fiber Communication ◽

Heavy Duty ◽

Operation Condition ◽

Nc Machine Tool ◽

Nc Machine ◽

And Control ◽

Five Axis

During machining some ultra-intense and special-shaped parts, unstability and surface ablation often turn up. Some large and heavy parts are often machined with heavy duty NC machine tool. For avoiding the processing defects of the above parts, an online monitoring, diagnosis and control system is designed for heavy duty NC machine tool. The system can online monitor the operation condition of heavy duty NC machine tool and real-time control the processing. Some methods of signal analysis and processing are adopted such as spectrum analysis, wavelet analysis, Wigner-Ville distribution and Artificial Neural Network etc. The system is developed with C language and Qt based on Linux operation system. Optical fiber communication is adopted between industrial computer and NC system. Experiment platform of the system is machining an aircraft landing gear with five-axis NC machine tool. The scheme is verified feasible after preliminary test.

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Effect of guide rail profile errors on the motion accuracy for a heavy-duty hydrostatic turntable

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406219845406 ◽

2019 ◽

Vol 233 (15) ◽

pp. 5350-5362 ◽

Cited By ~ 1

Author(s):

Yongsheng Zhao ◽

Hongchao Wu ◽

Congbin Yang ◽

Ligang Cai ◽

Zhifeng Liu

Keyword(s):

Machine Tool ◽

Reynolds Equation ◽

Machining Accuracy ◽

Guide Rail ◽

Heavy Duty ◽

Motion Equations ◽

Rotating Speed ◽

Proposed Model ◽

Reaction Forces ◽

Profile Errors

The motion accuracy of hydrostatic turntable is the key in improving the machining accuracy of heavy-duty machine tool. However, the motion accuracy of hydrostatic turntable depends not only on the offset load but also on the rotating speed of the turntable as well as the profile errors of the guide rails. In this paper, a simulation model is developed to analyze the effect of guide rail profile errors on the motion accuracy of hydrostatic turntable. The reaction forces of preload thrust bearing and hydrostatic circular oil pads are obtained based on the Reynolds equation of the lubricant film. The motion equations of hydrostatic turntable are derived in which the profile errors of two guide rails are considered. The results show that the motion accuracy of hydrostatic turntable can be affected by wavelength, amplitude of profile errors and speed, and offset load of turntable. Finally, the motion accuracy of heavy-duty hydrostatic turntable used in XCKA28105 type turning and milling composite machine tool is obtained by using the presented method. Comparing with the experimental results, the proposed model can be used to predict the machining accuracy caused by the profile errors of guide rails for any heavy-duty hydrostatic turntable.

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A Non-Delay Error Compensation Method for Dual-Driving Gantry-Type Machine Tool

Processes ◽

10.3390/pr8070748 ◽

2020 ◽

Vol 8 (7) ◽

pp. 748

Author(s):

Qi Liu ◽

Hong Lu ◽

Xinbao Zhang ◽

Yu Qiao ◽

Qian Cheng ◽

...

Keyword(s):

Machine Tool ◽

Error Compensation ◽

Prediction Method ◽

Compensation Method ◽

Industrial Robots ◽

Numerical Control ◽

Heavy Duty ◽

Positioning Errors ◽

Compensation Methods ◽

Type Machine

The drive at the center of gravity (DCG) principle has been adopted in computer numerical control (CNC) machines and industrial robots that require heavy-duty and quick feeds. Using this principle requires accurate corrections of positioning errors. Conventional error compensation methods may cause vibrations and unstable control performances due to the delay between compensation and motor motion. This paper proposes a new method to reduce the positioning errors of the dual-driving gantry-type machine tool (DDGTMT), namely, a typical DCG-principle-based machine tool. An error prediction method is proposed to characterize errors online. An algorithm is proposed to quickly and accurately compensate the errors of the DDGTMT. Experiment results verify that the non-delay error compensation method proposed in this paper can effectively improve the accuracy of the DDGTMT.

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A data-mining approach for technology innovation: A case of heavy-duty and large-size CNC machine tool industry in Hubei

2010 2nd International Conference on Future Computer and Communication ◽

10.1109/icfcc.2010.5497373 ◽

2010 ◽

Author(s):

Ying Zhang ◽

Weilai Huang ◽

Qin Yuan

Keyword(s):

Data Mining ◽

Machine Tool ◽

Technology Innovation ◽

Cnc Machine Tool ◽

Heavy Duty ◽

Cnc Machine ◽

Machine Tool Industry ◽

Data Mining Approach ◽

Large Size

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Design and Analysis of a 5-Axis Gantry CNC Machine Tool

MATEC Web of Conferences ◽

10.1051/matecconf/202031801019 ◽

2020 ◽

Vol 318 ◽

pp. 01019

Author(s):

Esra Yuksel ◽

Emre Özlü ◽

Ahmet Oral ◽

Fulya Tosun ◽

Osman Fatih İğrek ◽

...

Keyword(s):

Machine Tool ◽

Structural Dynamics ◽

Critical Points ◽

Fe Analysis ◽

Cnc Machine Tool ◽

Heavy Duty ◽

Cnc Machine ◽

Velocity Measurements ◽

Final Performance ◽

Measurement Results

In this study, design and analysis of a gantry-type 5-axis CNC machine tool is presented with experimental results on a manufactured prototype. Critical points in the design of a large-scaled and heavy-duty machine tool is discussed. Moreover, FE analysis results is also presented with detailed discussion. The measurement results on structural dynamics is shown together with the FE results. Furthermore, the final performance of the machine tool is demonstrated thorough position and velocity measurements of the axes.

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