陶瓷口腔修复体等应力高速铣5轴加工刀轨生成算法

发布时间：2018-03-16 23:13

本文选题：陶瓷　切入点：高速切削　出处：《中国生物医学工程学报》2014年01期 　论文类型：期刊论文

【摘要】：陶瓷具有硬脆的特点,机加工陶瓷口腔修复体时极易产生崩裂。为改善陶瓷切削性能,提高加工质量,运用力学强度理论,构建了一种陶瓷加工等剪应力设计的切削力模型,基于该模型可优化防裂加工的切削参数;提出适合陶瓷口腔修复体等应力高速铣5轴加工刀轨生成算法。依据提出的模型和算法,开发出等应力高速切削陶瓷口腔修复体的多轴加工自动编程系统(HGTRCAM),所生成的变小切深、变小进给量的5轴加工刀轨,经VERICUT仿真,发现刀矢正确、刀路几何一阶连续;运用Mikron高速加工中心进行陶瓷切削试验,结果表明,变小切深(0.5~0.1 mm)、变小进给量(0.03~0.005 mm/齿)高速切削陶瓷口腔修复体,与等切深(0.3 mm)、等进给量(0.015 mm/齿)高速切削的相比,避免了2~4 mm不等的加工崩裂,实现了陶瓷完好性加工。为口腔修复学中的陶瓷牙的制作,提供一种新的工艺方法。
[Abstract]:In order to improve the cutting performance and quality of ceramics, a cutting force model of equal shear stress design for ceramic machining is constructed by using the theory of mechanical strength. Based on the model, the cutting parameters of anti-crack machining can be optimized, and an algorithm for the generation of cutter tracks suitable for ceramic dental prosthesis with equal stress high speed milling for 5-axis machining is put forward, according to the proposed model and algorithm, An automatic programming system for multi-axis machining of ceramic dental prosthesis with equal stress and high speed cutting is developed. The 5-axis machining tool track with smaller cutting depth and smaller feed rate is generated. The VERICUT simulation shows that the tool vector is correct and the cutter path geometry is continuous in the first order. The experiment of ceramic cutting with Mikron high speed machining center shows that the cutting depth is 0. 5 ~ 0. 1 mm, and the feed rate is 0. 03 ~ 0. 005 mm/ tooth.) High speed cutting ceramic dental prosthesis is compared with equal cutting depth of 0. 3 mm, equal feed rate of 0. 015 mm/ tooth) high speed cutting. The process crack of 2mm and 4mm is avoided, and the ceramic perfect processing is realized, which provides a new process method for the manufacture of ceramic teeth in the field of prosthodontics.
【作者单位】：淮阴工学院江苏省数字化制造技术重点建设实验室;
【基金】：国家自然科学基金重点项目(51075173) 江苏省自然科学基金(BK2010288) 江苏省六大人才高峰项目(ZBZZ-036)
【分类号】：TP301.6;R783.1

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