Non-synchronous Error and Modeling of Dual-drive System in Gantry-type Machine Tools with Travelling Bridge

2013 ◽  
Vol 49 (13) ◽  
pp. 174 ◽  
Author(s):  
Yao CHENG
Keyword(s):  
Machine Tools ◽  
Drive System ◽  
Type Machine ◽  
Synchronous Error

Adaptive Verspannung von Zahnstange-Ritzel-Antrieben*/Adaptive preloading for rack-and-pinion-drives

2019 ◽  
Vol 109 (05) ◽  
pp. 312-318
Author(s):  
T. Engelberth ◽  
A. Verl
Keyword(s):  
Machine Tools ◽  
Energy Demand ◽  
High Accuracy ◽  
Drive System ◽  
New Method ◽  
Large Machine ◽  
Production Facilities

Zahnstange-Ritzel-Antriebe werden vorwiegend in großen Werkzeugmaschinen eingesetzt. Um die hohen Genauigkeitsanforderungen moderner Produktionsanlagen zu erreichen, werden diese Antriebe elektrisch verspannt. Die Verspannung ist konstant. Dieser Beitrag beschreibt eine neuartige Methode, die sogenannte adaptive Verspannung. Ziel ist es, den Energiebedarf und die Belastung des Antriebssystems durch Anpassung der Verspannung während des Betriebs zu reduzieren, ohne die Genauigkeit zu beeinflussen.   Rack-and-pinion-drives are mostly used in large machine tools. To achieve the high accuracy specifications of modern production facilities, these drives are electrically preloaded. The preload is constant. This article describes a new method of so-called adaptive preloading. The aim is to reduce energy demand and wear of the drive system by adjusting the preload during operation without affecting the accuracy.

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.

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.

Study on High Speed Feed Drive System for Machine Tools -Improvement of PID Control Parameter-

1993 ◽  
Vol 5 (4) ◽  
pp. 357-362
Author(s):  
Toshitake Tateno ◽  
◽  
Hiromu Nakazawa ◽  
Keyword(s):  
Pid Control ◽  
Machine Tools ◽  
High Speed ◽  
Drive System ◽  
Control Parameters ◽  
Hydraulic Actuator ◽  
Feed Drive ◽  
Large Size ◽  
Cutting Operation ◽  
Feed Drive System

In order to realize feed rate of 20m/min for cutting operation of medium and large size machine tools, a new high speed and high accuracy feed drive system which has a servomotor and ballscrew combined with a hydraulic actuator has been developed. As stated in a previous paper this system can drive ten times faster than conventional rate with considerable accuracy. This paper describes a method for determining optimal PI control parameters of the electric servomotor and PD control parameters of the hydraulic actuator. In order to make the best use of the hydraulic actuator a new function which compares the force of electric servomotor with that of hydraulic actuator is proposed. The experimental results show that the controlling parameters determined by this method reduce motor power and the method is proved to be effective.

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