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Research of Multi-cutting and Surface Integrity on High-Low Double Speed WEDM

Author: ChengGuoZhu
Tutor: LiuZhiDong
School: Nanjing University of Aeronautics and Astronautics
Course: Mechanical Manufacturing and Automation
Keywords: The level of two-speed go wire EDM Repeatedly cutting Finite Element Analysis Temperature field Surface integrity
CLC: TG484
Type: Master's thesis
Year: 2009
Downloads: 38
Quote: 4
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Abstract


High and low speed to go wire EDM wire cutting precision multiple cutting is an important way to improve cutting accuracy . First class machine is still using the traditional high-speed wire EDM wire cutting control system and high-frequency pulse power , price and running costs are far lower than the low-speed WEDM wire bed , easy to widely promote domestic and applications ; Second class machine tool cutting remains a high-speed reciprocating go wire , and many times when you switch to one-way low speed to go wire to correct the workpiece cutting , reduce the speed to go wire , one-way movement wire taken to limit the way , the stability in the spatial location of the wire , consistency can be greatly improved solve the problem of high-speed wire machine multiple cutting wire in the wire in the spatial location of consistency is not good because reciprocating at the same time do not consider silk consumption , and provides a new way for exploring the development of high precision WEDM in line with China 's national conditions . The main work of this paper is as follows : 1 ) a composite working fluid under high and low speed to go wire technology test . Test , repeatedly cutting use 8m/min one-way low speed to go wire \one-way low-speed to go wire can significantly improve cutting accuracy . 2 ) use of the finite element analysis of The single pulse spark discharge temperature field calculation simulation , and compared with the test results prove that the WEDM process indicators forecast analysis using the finite element method is entirely feasible . 3) a lot of research for the surface integrity of several cutting conditions , the cutting surface to form a \cutting using ion - free kerosene and finishing method of cutting the compressed air as the working medium , the results show that using this method , the cut surface of electrolytic pores and micro-cracks is decreased, the surface hardness has been greatly improved .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Welding, metal cutting and metal bonding > Metal cutting and equipment > Arc cutting and equipment
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