Research on a New Identification Approach of B Rotary Axe Geometric Error for Non-orthogonal Five-Axe CNC Machine Tool

2017 ◽  
Author(s):  
Jinwei Fan ◽  
Haitao Huang ◽  
Kaikai Liu ◽  
Qi Lv ◽  
Haohao Tao
Keyword(s):  
Machine Tool ◽  
Geometric Error ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Identification Approach

Experimental Study on Backlash Compensation of CNC Machine Tool

2012 ◽  
Vol 580 ◽  
pp. 419-422 ◽  
Author(s):  
Xiao Long Shen ◽  
Jia Ying Hu ◽  
Ming Jun Zhang ◽  
Lai Xi Zhang
Keyword(s):  
Machine Tool ◽  
Evaluation System ◽  
High Speed ◽  
Basic Feature ◽  
Geometric Error ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Position Accuracy ◽  
Different Types ◽  
Types Of Error

The backlash compensation has a great effect on the synthetical precision of CNC machine tool. Here, the measuring and backlash compensating technologies were investigated for high-speed CNC machine tool. Following, the backlash compensation of the synthetical geometric error of the interpolatimg movement and the evaluation system of position accuracy were proposed during CNC machine tool processing. The results indicate that the basic feature of error is established and provides a basis for putting forward the new error measurement method under the essential measuring condition. It also could be applied for different types of error compensation, shows that the backlash of the milling processing could be well compensated.

A Review of Geometric Error Modeling and Error Detection for CNC Machine Tool

2013 ◽  
Vol 303-306 ◽  
pp. 627-631 ◽  
Author(s):  
Zhen Yu Han ◽  
Hong Yu Jin ◽  
Yu Long Liu ◽  
Hong Ya Fu
Keyword(s):  
Machine Tool ◽  
Error Detection ◽  
Error Compensation ◽  
Machine Tools ◽  
Performance Criterion ◽  
Geometric Error ◽  
Error Modeling ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Error Sources

Error compensation can improve the accuracy of machine tools effectively. Among the error sources affecting the accuracy of CNC machine tool, geometric error is always set as a key performance criterion. This paper summarizes several methods of geometric error modeling and reviews the characteristics of different methods. Furthermore, available methods for measuring geometric errors have been reviewed also based on the advanced instruments. This work aims at enhancing the efficiency of error detection and give a perspective for the application of error compensation in the future.

Influence Analysis of Geometric Errors to Volumetric Machining Accuracy of a 5-Axis CNC Machine Tool

2013 ◽  
Vol 420 ◽  
pp. 85-91 ◽  
Author(s):  
Li Gang Cai ◽  
Qiu Nan Feng ◽  
Qiang Cheng ◽  
Pei Hua Gu ◽  
Cui Zhang
Keyword(s):  
Machine Tool ◽  
Geometric Error ◽  
Cnc Machining ◽  
Machining Accuracy ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Spatial Error ◽  
Matrix Differential ◽  
Multi Body ◽  
Five Axis

The precision model of the 5-axis CNC machine tool can be built up based on the theory of kinematics for multi-body system (MBS). And then based on the precision model, the sensitivity analysis established with matrix differential is a method of identifying geometric error parameters for machine tool. And the geometric error factors of major parts that have relatively significant influence on comprehensive spatial error of the machine tool are identified. Finally, important theoretical basis for improving the titanium alloy Five-axis CNC machining center reasonably and for the error compensation can be provided.

Machining Based Geometric Error Estimation Method for 3-Axis CNC Machine

2019 ◽  
Vol 889 ◽  
pp. 469-474
Author(s):  
Trung Kien Hoang ◽  
Nguyen Minh Duc Ta
Keyword(s):  
Machine Tool ◽  
High Accuracy ◽  
Geometric Error ◽  
Numerical Control ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Simple Method ◽  
Volumetric Errors ◽  
Measuring Machine ◽  
Cutting Path

Computer numerical control (CNC) machine tool plays an extremely significant role in any manufacturing industry due to its automation and high accuracy. Keeping the CNC machine tool at its highest performance to meet the demand of high accuracy machining is always significant. To maintain the accuracy of a machine tool over the time, it is important to measure and compensate the geometric error, one of the main error source of machine tool, especially when the machine get old. There are totally 21 geometrical errors in a 3-axis machine tool including three translational errors and three rotational errors for each axis and three perpendicular error (Squareness) within three axes of the machine. This paper presents an economical and simple method for measuring the geometric error of a 3-axis CNC machine tool based on the machining of actual samples. Three samples for each axis will be machined following a design cutting path. The samples will then be measured using a coordinate measuring machine (CMM). The collect data will be used for estimating the geometric errors. The volumetric errors will be then computed and verified through machining of 3D geometries.

scholarly journals Integrated Geometric Error Compensation of Machining Processes on CNC Machine Tool

Procedia CIRP ◽  
2013 ◽  
Vol 8 ◽  
pp. 135-140 ◽  
Author(s):  
Xiaoyan Zuo ◽  
Beizhi Li ◽  
Jianguo Yang ◽  
Xiaohui Jiang
Keyword(s):  
Machine Tool ◽  
Error Compensation ◽  
Geometric Error ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Machining Processes

Geometric Error Modeling and Sensitivity Analysis of Single-Axis Assembly in Three-Axis Vertical Machine Center Based on Jacobian-Torsor Model

2017 ◽  
Vol 4 (3) ◽  
Author(s):  
Du Zhengchun ◽  
Wu Jian ◽  
Yang Jianguo
Keyword(s):  
Sensitivity Analysis ◽  
Machine Tool ◽  
Geometric Error ◽  
Error Modeling ◽  
Numerical Control ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Machine Center ◽  
Mechanical Parts ◽  
Final Error

The influence of component errors on the final error is a key point of error modeling of computer numerical control (CNC) machine tool. Nevertheless, the mechanism by which the errors in mechanical parts accumulate to result in the component errors and then impact the final error of CNC machine tool has not been identified; the identification of this mechanism is highly relevant to precision design of CNC machine. In this study, the error modeling based on the Jacobian-torsor theory is applied to determine how the fundamental errors in mechanical parts influence and accumulate to the comprehensive error of single-axis assembly. First, a brief introduction of the Jacobian-torsor theory is provided. Next, the Jacobian-torsor model is applied to the error modeling of a single-axis assembly in a three-axis machine center. Furthermore, the comprehensive errors of the single-axis assembly are evaluated by Monte Carlo simulation based on the synthesized error model. The accuracy and efficiency of the Jacobian-torsor model are verified through a comparison between the simulation results and the measured data from a batch of similar vertical machine centers. Based on the Jacobian-torsor model, the application of quantitative sensitivity analysis of single-axis assembly is investigated, along with the analysis of key error sources to the synthetical error ranges of the single-axis assembly. This model provides a comprehensive method to identify the key error source of the single-axis assembly and has the potential to enhance the tolerance/error allocation of the single axis and the whole machine tool.

Influence Analysis of Machine Tool’s Turntable Angle Errors to the Roundness of Machined Hole

2014 ◽  
Vol 496-500 ◽  
pp. 816-822
Author(s):  
Qiang Cheng ◽  
Hong Wei Zhao ◽  
Li Gang Cai ◽  
Pei Hua Gu
Keyword(s):  
Machine Tool ◽  
Geometric Error ◽  
Cnc Machine Tools ◽  
Machining Accuracy ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Roundness Error ◽  
Machine Errors ◽  
Multi Body ◽  
The Mathematical Model

Machining accuracy has always been a key problem to machine tool. Machine errors are caused by a variety of error factors among which the geometric error is a key element. An accuracy model of the 3-axis CNC machine tool is established in this paper with multi-body system (MBS).And based on the accuracy model, the mathematical model of roundness error also built up. At last, the influence of CNC machine tools turntable angle error to roundness error of machined hole is analyzed.

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