- 學位論文
微形手術刀導管沖壓製程分析
An Analysis of Stamping Processes for Micro-Scalpels Catheter
摘要
近年來由於醫療技術的進步，手術過程趨於精細而複雜，相對的手術器械的規格要求精密而多樣，所需具備之機械性質相較於一般用途的手工具要求嚴格。為滿足手術目的，醫療器械功能及外型亦較為特殊。器械常會有尖銳轉角、邊緣刃口等強度較低之部位，因此需採用機械性質較佳之不銹鋼為製作材料。手術器械易具有量少樣多的特性。如何改進製作流程，解決手術器械製造上的問題，是本文主要探討的目標。由於微形手術刀導管斜槽斷面品質易不穩定，往往後續仍需要進行修邊加工，其沖壓後的不良現象包括斷面粗糙以及尺寸精度不佳等現象。因此，本論文主要應用DEFORM 電腦輔助分析軟體，模擬不銹鋼微形手術刀導管之沖剪及彎曲5道次成形製程。沖剪分析採用DEFORM 2D模組進行分析，而彎曲道次採用DEFORM 3D進行分析，將產生的板材彎曲變形，應力，應變分佈等狀況，進行討論與研究。從模擬分析結果與實驗比對，模擬分析所得到的數據與成品尺寸差異不大，且斷面毛邊皆落於0.02mm左右，模擬所得到的數值參考價值極高，往後可作為開發設計的參考依據。得到一套符合目前沖壓的加工模式，達到縮短加工製程時間及節省加工成本的目的。
並列摘要
In recent years, due to the advanced medical technology, makes the surgical procedures become more fine and complex. Therefore, the precision of surgical instruments have been highly required. And compare to the standard of hand tools, they have more strictly mechanical properties. In order to fulfill the surgical purposes, the functional and appearance of medical instruments are relatively special. It’s common to have sharp corners, cutting and knife’s edges on surgical instruments. But that will lower the strength of those parts, so they need to be produced by stronger material, such as stainless steel. One of the characteristic of surgical instruments is less quantities but within many different kinds of forms. The main topic for this thesis is how to improve and solve the technical issue during the produce process. After the stamping process will have few defects, like rough cutting surface and imprecisely dimensions, cause the quality of tub, which using on the minimally invasive surgery, is really unstable. Therefore need to add one more de-burr process after stamping. In this thesis is to show, how to use DEFORM computer aided analysis program to simulate the stainless steel tub of minimally invasive surgery in stamping, shearing and bending machinery process. Stamping and shearing analysis is ran by DEFORM 2D module, and bending analysis is by 3D module. And the results of bending deformation, stress and stress distribution will be discussed and researched afterward. Comparing the analysis of simulation to the lab, the simulation data had not much big difference between the final dimensions. Also the de-burr of cutting edge is around 0,02mm. It means that the data provided with highly reference value, can be taken as the reference during development process. By this program can shorten the produce process and reduce the production costs.