电火花线切割超大厚度切割技术的的分析研究.pdf

摘要摘要本文研究了电火花线切割超大厚度切割技术。分析了引起超大厚度工件线切割加工难以获得突破的根源所在,提出了一套解决该问题的方法,在此基础上改进了现有的电火花线切割机床,实现了超大厚度线切割加工,并进行了相关的试验和分析。在此过程中还发明了一种新型电极丝,并进行初步的研制、试验和分析。首先对电火花线切割大厚度切割技术的原理及研究现状进行分析,主要分析了加工的机理和特点,掌握了国内外电火花线切割大厚度切割技术研究所取得的成果。随后在前人对大厚度切割技术研究的基础上,分析了目前超大厚度工件切割困难的根本原因所在:(1)大量的电蚀产物难于从狭小的切缝中排除出来;(2) 大跨距下电极丝振动严重;(3)/Jn工参数的选择不合适导致超大厚度工件切割不能稳定进行。然后,根据上述三个根本原因展开研究工作。首先通过对现有电火花线切割机床进行一系列改进,设计了合适的张力机构,安装了走丝速度的变频器, 安装了电极丝定位器,提高了导轮组和滚丝筒组的配合度,设计出更加完善的工作液过滤装置,然后选定了高性能的水基环保型线切割工作液。满足了试验的要求。最后进行了大量的工艺实验。实验内容包括两个方面:一、研究超大厚度切割条件下,加工参数对加工指标的影响,尤其是对加工速度的影响。初步得出超大厚度工件切割的最佳加工参数设计。二、针对实际生产需要,进行了超大厚度辊轮狭槽的加工,解决了该类企业长期面临的技术难题,体现了电火花线切割超大厚度切割技术的实用价值。本论文较系统地在理论与实践上探讨了电火花线切割超大厚度工件的切割技术,提出了超大厚度工件切割的解决方法,改进了机床的设备,进行了一系列的工艺试验,探索了超大厚度线切割的加工机理,取得了良好的效果。关键词:电火花线切割,超大厚度,电蚀产物,电极丝振动广东工业大学硕士学位论文 Abstract A new super--large thickness cutting technology based on WEDM·-HS has been studied in this that super—large thickness workpiece can not be processed even by employed WEDM-HS have been found problems have been deeply e these problems,the WEDM super—large thickness tool has been ameliorated,and the related test and analysis has been designed and built the process,a new type ofelectrode wire has been invented,and the primary type has been some experiment results has been obtained and analyzed. In the first part of this paper,the essential theory and status quo of the super-large thickness cutting technology has been analyzed,mainly based on the processing mechanism and characteristics,and the actuality machining experience on the super-large thickness with WEDM technology inthe world has been congregated. By summarizing the experience ofpredecessors on the area of cutting super—large thickness workpiece,it can be concluded that there are three basic reasons for the problem existing inthe process asfollowed:(1)Discharge debris isdifficult to be discharged inthissuper—large thickness cutting the slotprocessing area is too narrow while itisdiffi