4550488 Gang head type machine tool

1986 ◽  
Vol 26 (3) ◽  
pp. iii
Keyword(s):  
Machine Tool ◽  
Type Machine ◽  
Head Type

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

Processes ◽  
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.

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.

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.

605 Study of a parallel mechanism type machine tool and its tool path generation for high-precision work

2006 ◽  
Vol 2006.43 (0) ◽  
pp. 177-178
Author(s):  
Ryoji HATTORI ◽  
Hiroshi TACHIYA ◽  
Naoki ASAKAWA ◽  
Yoshiyuki KANEKO ◽  
Hiroshi YACHI
Keyword(s):  
Machine Tool ◽  
High Precision ◽  
Parallel Mechanism ◽  
Tool Path ◽  
Tool Path Generation ◽  
Path Generation ◽  
Type Machine

3608 Development of the nozzle type ELID grinding system for desktop type machine tool for V-Cam

2007 ◽  
Vol 2007.4 (0) ◽  
pp. 281-282
Author(s):  
Yoshihiro UEHARA ◽  
Hitoshi OHMORI ◽  
Weimin LIN ◽  
Yutaka WATANABE ◽  
Tetsuya NARUSE ◽  
...  
Keyword(s):  
Machine Tool ◽  
Elid Grinding ◽  
Type Machine ◽  
Grinding System ◽  
Nozzle Type

scholarly journals Study on the dynamic identification method of the weak part of the bar-shaped combined structure

2021 ◽  
Vol 13 (2) ◽  
pp. 168781402199652
Author(s):  
Tieneng Guo ◽  
Lingjun Meng ◽  
Jinxuan Cao ◽  
Chunsheng Bai ◽  
Xu Hua ◽  
...  
Keyword(s):  
Machine Tool ◽  
Test Method ◽  
Fe Method ◽  
Dynamic Identification ◽  
Vibration Data ◽  
Weak Part ◽  
Combined Structure ◽  
Type Machine ◽  
Value Decomposition ◽  
Space Method

The weak part of the stiffness of machine tool combined structure is the key to improve the stiffness of machine tool. To overcome the static deformation with difficulty acquisition, the paper chooses machine tool combined structure which can be equivalent to one-dimensional bar structure, and a weakness index (WI) is proposed to identify the weak part of the stiffness by means of the dynamic hammer test method. Based on the bar structure as a numerical example, the weak parts are modeled as EA reduction in stiffness while the mass is maintained at a constant value. Thorough finite element (FE) method simulations are performed to assess the robustness and limitations of the method in several scenarios with single and multiple weakness. On the crossbeam of gantry type machine tool, the sensors are used to collect vibration data, the structural modal parameters are obtained by singular value decomposition (SVD) technique, and the dynamic characteristics are systematically reconstructed by using modal state space method to obtain stiffness data at zero-frequency. Then, the weak part of the structural stiffness is identified by the weakness index. Finally, the comparison of FE simulations and experiment results are provided to illustrate the working of the method.

scholarly journals Error Analysis of a Serial–Parallel Type Machine Tool

2002 ◽  
Vol 19 (3) ◽  
pp. 174-179 ◽  
Author(s):  
J.-W. Zhoa ◽  
K.-C. Fan ◽  
T.-H. Chang ◽  
Z. Li
Keyword(s):  
Error Analysis ◽  
Machine Tool ◽  
Type Machine ◽  
Parallel Type

scholarly journals Forward Kinematics Model for Evaluation of Machining Performance of Robot Type Machine Tool

2021 ◽  
Vol 15 (2) ◽  
pp. 215-223
Author(s):  
Akio Hayashi ◽  
Hiroto Tanaka ◽  
Masato Ueki ◽  
Hidetaka Yamaoka ◽  
Nobuaki Fujiki ◽  
...  
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Geometric Model ◽  
Forward Kinematics ◽  
Machining Accuracy ◽  
Machining Performance ◽  
Machined Surface ◽  
Kinematics Model ◽  
Tool Posture ◽  
Type Machine

Robot-type machine tools are characterized by the ability to change the tool posture and machine itself with a wider motion range than conventional machine tools. The motion of the robot machine tool is realized by simultaneous multi-axis control of link mechanisms. However, when the robot machine tool performs a general milling process, some problems that affect the machining accuracy occur. Moreover, it is difficult to identify the motion errors of each axis, which influence machining accuracy. Thus, it is difficult to adjust the servo gain and alignment error. In addition, the machining performance is unidentified because of the rigidity differences when the posture changes. In this study, the focus was on robot-type machine tools consisting of a serial and a parallel link mechanism. A geometric model is described, and the forward kinematics model is derived based on the geometric model. Machining tests were then carried out to evaluate the machining accuracy by measuring the machined surfaces and the simulated motion of the tool posture based on the proposed forward kinematics model to identify the mechanism that affects the machined surface roughness and surface waviness. As a result, it was shown that the proposed model can separate and reproduce the behavior of each axis of the machine. Finally, it was clarified that the behavior of the second axis has a great influence on the tool posture and machined surface.

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