航空钛合金复杂结构件铣削刀具性能综合评判技术研究

发布时间：2018-04-11 06:32

本文选题：钛合金 + 铣削　；参考：《南京航空航天大学》2015年硕士论文

【摘要】：刀具是钛合金切削加工的根本保障和必备条件之一。目前国内航空制造业对钛合金铣削刀具的选择仍缺少系统的评价方法,往往造成实际加工过程中刀具成本增加、加工质量不稳定、加工效率低下等问题。为此,本文提出了一种刀具性能综合评判方法,并通过铣削试验验证了其可行性。论文主要研究工作包括:(1)综合分析了航空钛合金复杂结构件的结构与工艺特点,构建了两套用于其刀具性能评价的基准件模型,该模型涵盖了航空钛合金复杂结构件的多种难加工特征,可用于多类航空钛合金复杂结构件中小型铣削刀具的切削性能评判。(2)针对航空钛合金结构件的粗、精加工,建立了相应的刀具性能评价指标,进而基于模糊数学理论分别构建了粗、精加工刀具性能综合评判模型,并通过铣削试验验证了模型的可行性,最后开发了相应的刀具性能评判软件。(3)基于刀具性能综合评判模型进行了基准件铣削试验研究,评判了四种粗加工硬质合金刀片、六种精加工整体硬质合金刀具的切削性能。试验结果表明,所设计的基准件模型和刀具性能评判模型能够很好地评判和优选刀具。
[Abstract]:Cutting tool is one of the basic guarantee and necessary condition of titanium alloy cutting.At present, the selection of titanium alloy milling tool in domestic aviation manufacturing industry is still lack of systematic evaluation method, which often results in the increase of tool cost, unstable machining quality and low machining efficiency in the actual machining process.In this paper, a comprehensive evaluation method of tool performance is proposed, and its feasibility is verified by milling test.The main research work in this paper includes: (1) the structure and process characteristics of complex structure parts of aeronautical titanium alloy are analyzed synthetically, and two reference parts models used for tool performance evaluation are constructed.This model covers many difficult machining characteristics of complex structure parts of aviation titanium alloy, and can be used to evaluate the cutting performance of small and medium-sized milling cutters for various types of complex structure parts of aeronautical titanium alloys. (2) for the coarse and finish machining of aeronautical titanium alloy structural parts,Based on the fuzzy mathematics theory, the comprehensive evaluation model of roughing and finishing tool performance is established, and the feasibility of the model is verified by milling experiment.Finally, the corresponding tool performance evaluation software is developed. Based on the comprehensive evaluation model of tool performance, the milling experiments of benchmark parts are carried out, and the cutting performance of four kinds of rough cemented carbide inserts and six kinds of finish machining monolithic carbide cutters are evaluated.The experimental results show that the designed reference part model and tool performance evaluation model can judge and select the tool well.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：V261.23

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