PCD微细铣刀的设计与制造基础研究

发布时间：2018-01-18 12:31

本文关键词：PCD微细铣刀的设计与制造基础研究　出处：《南京航空航天大学》2015年博士论文　论文类型：学位论文

【摘要】：微细铣削是在介观和微观尺度范围内去除材料的一种加工方法,但是由于切削厚度与刃口钝圆半径相接近,微细铣削工作在严重的尺寸效应区,导致加工过程中产生毛刺严重、表面质量差、刀具易断裂等问题。微细铣削中工件表面质量、刀具磨寿命都受到微细铣刀的刀具材料、刃口钝圆、结构角度等基本特征参数的影响,微细铣刀是实现高精密微细铣削的关键因素。本文围绕微细铣刀的设计理论和制造技术开展研究,其主要研究内容如下:(1)在分析现有微细铣刀设计制造方面优缺点的基础上,提出了以切削比能为核心的超硬微细铣刀设计原则;形成了基于加工精度、可生产性和加工性能的超硬微细铣刀P3设计优化流程。(2)提出了刀刃直径0.5mm以下的超硬微细铣刀的基本结构形式和基准表征参数,根据不同应用需求设计优化了超硬微细铣刀刀具选材、结构、角度等表征参数。(3)突破了PCD微细铣刀的高频感应焊接、WEDM刀刃成型和刃口钝圆精密刃磨等工艺难题,制作了0.5、0.2、0.1mm等直径系列的PCD微细铣刀。提出正交试验和灰色相关分析相结合进行优化PCD微细铣刀精密刃磨工艺的方法,实现了多个不同量纲的评价指标的同一化,解决了多个评价指标的刃磨工艺参数优化难题。(4)应用PCD微细铣刀进行了无氧铜铣削实验和硬质合金延性铣削实验研究,以控制表面粗糙度、毛刺、铣削力为目标优化微细铣削工艺参数,实现无氧铜的精密铣削加工和硬质合金的延性域镜面加工。
[Abstract]:Micro milling is a kind of processing method to remove material in mesoscopic and micro scale, but because the cutting thickness is close to the blunt radius of the cutting edge, the micro milling works in the serious size effect region. In the process of micro-milling, the surface quality of the workpiece and the tool life are all affected by the material of the micro-milling cutter, and the cutting edge is obtuse. The micro milling cutter is the key factor to realize the high precision micro milling due to the influence of the basic characteristic parameters such as the structure angle. This paper focuses on the design theory and manufacturing technology of the micro milling cutter. The main research contents are as follows: (1) on the basis of analyzing the advantages and disadvantages of the design and manufacture of existing micro milling cutters, the design principle of super hard micro milling cutters with cutting ratio as the core is put forward. Forming based on machining accuracy. The design and optimization flow of P3 of the super-hard micro-milling cutter with productivity and machining performance. (2) the basic structural form and the standard characterization parameters of the super-hard micro-milling cutter with the diameter of 0.5 mm or less are proposed. According to different application requirements, the material selection, structure, angle and other characterization parameters of ultra-hard micro-milling cutters are optimized, which breaks through the high-frequency induction welding of PCD micro-milling cutters. WEDM cutting edge forming and edge blunt-circle precision grinding and other technical problems, the production of 0.5N0. 2. PCD micro milling cutter with equal diameter of 0.1mm. The method of optimizing the precision grinding process of PCD micro milling cutter by combining orthogonal test and grey correlation analysis is put forward. Several different dimensions of the evaluation indicators of the same. In order to control the surface roughness and burr, the experiments of oxygen free copper milling and cemented carbide ductile milling were carried out with PCD micro milling cutter. The milling force is the objective to optimize the process parameters of fine milling to realize precision milling of oxygen free copper and mirror machining of cemented carbide in ductility domain.
【学位授予单位】：南京航空航天大学
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TG714

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