Authors: Xiao Ming Qian, Wen Hua Ye, Xiao Mei Chen
Abstract: This paper advances a method to implement the on-machine measurement (OMM) with
the touch-trigger probe, also called switching probes. Some of the advantages and disadvantages for
touch-trigger probe are discussed. However, the touch-trigger probe errors exist and become one of
the major errors for the measurement accuracy. Major factors that influence the probe measurement
have been analyzed. The basic technique of probe measurement error modeling with artificial neural
network was researched, and also the probe measurement error compensation with 3-layered backpropagation
artificial neural network was presented. At last in the experimental system composed of
DIXI 50 machining center, Fanuc 16i control system, Blum CNC P82.046 probe and PC, valid the
correlated techniques. In addition, the connection and communication between the machining center
equipped with probe system and the computer have been introduced. The experiment indicated that,
using the touch-trigger probe makes on-machine measurement more automatic and efficient. And
by using the back-propagation neural network for error compensation make on-machine
measurement more precise.
558
Authors: Yun Huang, Zhi Huang, Wei Wen Zhang, Li Ping Wang
Abstract: This paper describes the current processing problem of China's nuclear power vessel head, bring forward a method which can process groove and welding seam, eliminate welding root and polish surface with high efficiency deep grinding wheel and heavy duty abrasive belt grinding technology by CNC in a grinder, expatiates this new large gantry grinding machine structure design and CNC key techniques, finally summarizes this new grinding techniques and machine.
421
Authors: Chen Jiang, Yin Biao Guo, Wei Yang, Chun Guang Han, Hai Bin Huang
Abstract: This paper presents a wireless distributed monitoring and system in optical aspheric grinding environment. The architecture of proposed system and the details of monitoring strategy are discussed according to the characteristic of optical aspheric grinding. The results of experiments have shown that the proposed system can be used effectively in optical aspheric grinding.
2324
Abstract: Paper analyzed diagnosis technologies that were applied to manufacturing equipment, and researched the unidirectional mesh data structure of the fault essence. Then the integrated diagnosis method was proposed. The method was based on structure-fault tree, which has a good capability in knowledge management and maintenance. Diagnosis knowledge representation and organization model was expatiated, at same time the integrated reasoning process was accomplished. Finally, a prototype system for the CNC machine was developed that has verified the method’s correctness and feasibility.
2629
Authors: Eustaquio García Plaza, Pedro Jose Núñez López, Francisco Mata, A. Sanz
Abstract: The primary aim of this study was to design and develop an on-line control system of finished surfaces in automated machining process by CNC turning. The control system consisted of two basic phases: during the first phase, surface roughness was monitored through cutting force signals; the second phase involved a closed-loop adaptive control system based on data obtained during the monitoring of the cutting process. The system ensures that surfaces roughness is maintained at optimum values by adjusting the feed rate through communication with the PLC of the CNC machine. A monitoring and adaptive control system has been developed that enables the real-time monitoring of surface roughness during CNC turning operations. The system detects and prevents faults in automated turning processes, and applies corrective measures during the cutting process that raise quality and reliability reducing the need for quality control.
157
