Development of Forming Technology of Medical Micro-Parts by using Micro-Turret Method

1.研究背景与目的随着近年来医疗保健水平的提高，医疗器械的重要性日益凸显。大多数医疗器械形状复杂，其生产需要先进的技术和相当长的时间。这些产品因此变得昂贵。本研究开发了一套复杂医疗器械可靠加工系统。详细、复杂形状医疗器械加工系统开发如下。(1)系统概述由于该系统主要用于各类产品的小批量生产，因此通过结合锻造和剪切塑性加工技术，它已被开发用于执行各种类型的加工方法。许多冲头和模具安装在一个圆盘上称为转塔，这些可以自由选择加工过程中。有些可以旋转以形成所需的角度。材料是一根连接到材料支架上的圆线…更多关于xyz rheta舞台。这个圆线可以绕它自己的纵轴（轴）旋转，这样，它就有了五轴运动的自由度。利用所需的刀具选择和工作台定位功能，通过锻造和剪切工艺的结合来获得设计的形状。这个系统完全由计算机控制。成形精度在很大程度上取决于工作台定位精度。这是根据误差传播规则从每个驱动单元特有的精度计算出来的。(2)系统功能对所开发系统的功能进行了研究。定位精度在2-5 mm范围内是满意的。以医用镊子为例。镊子由平区、凸区、孔、曲线和缺口组成，代表典型的产品。该系统的生产时间是现有加工技术的十分之一，成本是现有加工技术的百分之一，达到了最初的目标。通过磁抛光过程完全消除毛刺。以上结果表明所开发的系统达到了预期的效果。少

1.Background and Purpose of ResearchWith the extremely high standard of medical care in the recent years, the importance of medical devices is ever more increasing. Most medical devices have complicated shapes, and their production requires advanced skills and considerable time. These products thus become expensive. In this study, a system for machining complicated medical devices reliably has been developed.2.Machining System for Detailed and Complicated Shape Medical DevicesThe system developed is as follows.(1) Outline of SystemSince the system is intended mainly for small lot production of various types of products, it has been developed to perform various types of machining methods by incorporating forging and shearing plastic working technologies. Numerous punches and dies are mounted on a disc called turret, and these can be selected freely during machining. Some have been made to rotate to create the desired angle. The material is a round wire to be attached to the material hol … More der on the xyz rheta stage. This round wire can be rotated around its own longitudinal axis (phi axis), so that, this has the five axs movement freedom. The shape disigned is attained by the combination of forging and shearing processes using the functions of the desired tool selection and stage positioning. The system is fully controlled by the computer. The forming accuracy depends on the stage positioning accuracy to a great extent. This is calculated from the accuracies peculiar to each driving unit by the error propagation rule.(2) Functions of SystemThe functions of the system developed were studied. The positioning accuracy was satisfactory at 2-5 mum. A medical forceps was fabricated as an example. The forceps consists of flat areas, protruding areas, holes, curves, and notches, representing a typical product. The production time of this system was found to be one-tenth of current machining techniques, and the costs one-hundredth, thus meeting the initial goals. Burrs are eliminated completely by a magnetic polishing process. The above results indicate that the system developed satisfies the expected. Less