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Download PDF by Xiaoqi Chen, Rajagopalan Devanathan, Aik Meng Fong: Advanced Automation Techniques in Adaptive Material

By Xiaoqi Chen, Rajagopalan Devanathan, Aik Meng Fong

ISBN-10: 9810249020

ISBN-13: 9789810249021

ISBN-10: 9812777776

ISBN-13: 9789812777775

This quantity provides the editors' learn in addition to comparable findings at the purposes of recent applied sciences in electric and digital engineering to the automation of a few of the typical production tactics that experience characteristically been dealt with in the mechanical and fabric engineering disciplines. particularly, the textual content comprises the most recent study effects completed via utilized examine and improvement initiatives during the last few years on the Gintic Institute of producing know-how, Singapore. It discusses complex automation applied sciences comparable to in-process sensors, laser imaginative and prescient structures, and laser strobe imaginative and prescient, in addition to complex ideas similar to sensory sign processing, adaptive strategy keep watch over, fuzzy common sense, neural networks, specialist structures, laser processing keep watch over, and so forth. The methodologies and methods are utilized to a couple very important fabric processing purposes, together with grinding, sprucing, machining, and welding. sensible automation suggestions, that are complex by means of half distortions, instrument put on, method dynamics, and editions, are defined.

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2 Robot Holding Workpiece The robot-holding-workpiece configuration is desirable if a large amount of material is to be removed and the tool wear is severe. The approach allows the tool station to be fixed on the floor with less space constraint. Therefore, a long belt (often a few meters) can be employed. Figure 7 shows a robot holding the workpiece against the tool head. In general, there are two variations in this approach, namely fixed tool head and floating tool head. In a fixed tool head polishing system, the contact force depends on the physical characteristics of the contact wheel and the belt, and the robot endeffector displacement.

Table 1 Overhaul conditions of jet engine turbine vanes. 5 mm Defined sets About 80% of airfoil surface Manually done with dispenser Table 2 Compositions and properties of braze material. 48 Blending can be defined as the material removal process to achieve the desired fmish profile and surface finish roughness. The process is often 24 X Q Chen, Z M Gong, H Huang, S Z Ge, and L B Zhou employed to remove excessive material on surfaces of new jet engine parts or overhaul turbine airfoils. Within the blending process, we further define rough grinding as the process step to remove the excessive material with the profile generation as the primary aim.

0 min. 0 min. 25 The evaluation results for milling, grinding and belt polishing are summarised in Table 5. 6 micron Ra. However, they differ greatly in terms of material removal rate, hence the cycle time. 8 g/min respectively. The resultant long cycle times are unacceptable for production use when there are large amount of materials to be removed. On the other hand, belt polishing offers a superior removal rate of 15 g/min, and each belt can process three pieces. However its position control is less accurate due to its area contact and belt vibration.

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Advanced Automation Techniques in Adaptive Material Processing by Xiaoqi Chen, Rajagopalan Devanathan, Aik Meng Fong


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