Influence of Geometric Deviations Existing in Joints of Parallel Link Type Machine Tools on the Circular Trajectories

2004 ◽  
Vol 2004.5 (0) ◽  
pp. 155-156
Author(s):  
Chengri CUI ◽  
Masaomi TSUTSUMI
Keyword(s):  
Machine Tools ◽  
Link Type ◽  
Geometric Deviations ◽  
Type Machine ◽  
Parallel Link

Machining Performance Evaluation of Robot Type Machine Tool Based on Forward Kinematics Model

2020 ◽  
Author(s):  
Akio Hayashi ◽  
Masato Ueki ◽  
Keisuke Nagao ◽  
Hiroto Tanaka ◽  
Yoshitaka Morimoto ◽  
...  
Keyword(s):  
Machine Tools ◽  
Geometric Model ◽  
Forward Kinematics ◽  
Machining Accuracy ◽  
Machining Performance ◽  
Kinematics Model ◽  
Link Mechanism ◽  
Conventional Machine ◽  
Type Machine ◽  
Parallel Link

Abstract Robot type machine tools with parallel link mechanism are characterized by the performance to change tool posture and machine wider range than conventional machine tools. It is realized by simultaneous multi-axis control of parallel link mechanism. However, there are some problems, it is difficult to identify and adjust alignment error. In addition, the machining performance is unidentified due to the rigidity is different from conventional machine tools. In this research, a geometric model is described and the forward kinematics model is derived based on the geometric model. Then, the machining tests were carried out to evaluate the machining accuracy by measured machined surface and the simulated motion of tool cutting edge based on proposed forward kinematics model.

scholarly journals DEVELOPMENT OF A HYDRAULIC PARALLEL LINK TYPE OF FORCE DISPLAY

2002 ◽  
Vol 2002 (5-2) ◽  
pp. 471-476 ◽  
Author(s):  
Shigeki KUDOMI ◽  
Hironao YAMADA ◽  
Takayoshi MUTO
Keyword(s):  
Link Type ◽  
Parallel Link

Control of PLC for Paving Stock Mechanism of New-Type Machine Tool about Rapid Prototyping Manufacturing for Ceramic Parts

2010 ◽  
Vol 154-155 ◽  
pp. 1085-1090
Author(s):  
Dong Qiang Gao ◽  
Zhen Ya Tian ◽  
Fei Zhang
Keyword(s):  
Rapid Prototyping ◽  
Machine Tool ◽  
Machine Tools ◽  
Programmable Logic Controller ◽  
Programmable Logic ◽  
New Type ◽  
Type Machine ◽  
Working Principle ◽  
Rapid Prototyping Manufacturing ◽  
Automatic Manufacturing

With the development of the rapid prototyping manufacturing for ceramic parts, it is possible to shorten the manufacturing period of ceramic parts and improve the enterprise’s productivity efficiency. The development situation of the machine tools about rapid prototyping manufacturing for ceramic parts was introduced. A new-style device about rapid prototyping manufacturing for ceramic parts, which is based on the technology of laminated coalition and rapid concrete prototyping for ceramic parts, is designed. The basic constitutions, technical processing and working principle of the paving stock mechanism of the device have also been described. The PLC (programmable logic controller) is applied in the paving stock mechanism for controlling and runs well, which meets the requirements of automatic manufacturing for ceramic parts and improves the efficiency.

A method for thermal characterization and modeling of large gantry-type machine tools

2012 ◽  
Vol 62 (9-12) ◽  
pp. 875-886 ◽  
Author(s):  
E. Gomez-Acedo ◽  
A. Olarra ◽  
L. N. Lopez de la Calle
Keyword(s):  
Machine Tools ◽  
Thermal Characterization ◽  
Type Machine

Development and Evaluation of Miniaturized 6-DOF Parallel Link Manipulator

2012 ◽  
Vol 523-524 ◽  
pp. 756-761
Author(s):  
Ryujiro Kobayashi ◽  
Ryo Tsuboi ◽  
Shinya Sasaki
Keyword(s):  
Range Of Motion ◽  
Machine Tools ◽  
High Accuracy ◽  
Sufficient Accuracy ◽  
High Rigidity ◽  
Parallel Link ◽  
Electronic Parts ◽  
Small Parts

Recently, compact machine tools have witnessed increased demand in the manufacture of small parts with high accuracy. However, miniaturization of these machines poses problems such as decrease in the accuracy and the range of motion. We focused on miniaturizing a parallel link manipulator, which is known to have high rigidity and accuracy. A non-cylindrical link was adopted in the designed manipulator for avoiding collisions among links with an impact drive actuator attached to their side. We confirmed through repeatability measurements that the developed manipulator had sufficient accuracy for handling small electronic parts.

An investigation on modeling and compensation of synthetic geometric errors on large machine tools based on moving least squares method

2016 ◽  
Vol 232 (3) ◽  
pp. 412-427 ◽  
Author(s):  
Zihan Li ◽  
Wenlong Feng ◽  
Jianguo Yang ◽  
Yiqiao Huang
Keyword(s):  
Machine Tool ◽  
Least Squares ◽  
Error Compensation ◽  
Machine Tools ◽  
Geometric Error ◽  
Moving Least Squares ◽  
Geometric Errors ◽  
Position Accuracy ◽  
Type Machine ◽  
Large Machine

This article intends to provide an efficient modeling and compensation method for the synthetic geometric errors of large machine tools. Analytical and experimental examinations were carried out on a large gantry-type machine tool to study the spatial geometric error distribution within the machine workspace. The result shows that the position accuracy of the tool-tip is affected by all the translational axes synchronously, and the position error curve shape is non-linear and irregular. Moreover, the angular error combined with Abbe’s offset during the motion of a translational axis would cause Abbe’s error and generate significant influence on the spatial positioning accuracy. In order to identify the combined effect of the individual error component on the tool-tip position accuracy, a synthetic geometric error model is established for the gantry-type machine tool. Also, an automatic modeling algorithm is proposed to approximate the geometric error parameters based on moving least squares in combination with Chebyshev polynomials, and it could approximate the irregular geometric error curves with high-order continuity and consistency with a low-order basis function. Then, to implement real-time error compensation on large machine tools, an intelligent compensation system is developed based on the fast Ethernet data interaction technique and external machine origin shift, and experiment validations on the gantry-type machine tool showed that the position accuracy could be improved by 90% and the machining precision could be improved by 85% after error compensation.

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