內窺鏡施夾器夾爪熱處理斷裂分析與改善驗證;Analysis of Heat Treated Jaw Fracture of Endoscope Clip Applier and Validation of Mitigation Measure

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/86825

Title:	內窺鏡施夾器夾爪熱處理斷裂分析與改善驗證;Analysis of Heat Treated Jaw Fracture of Endoscope Clip Applier and Validation of Mitigation Measure
Authors:	曾慶祥;TSENG, CHING-HSIANG
Contributors:	機械工程學系在職專班
Keywords:	夾爪;回彈力;疲勞失效;麻田散鐵系不銹鋼;淬火;冷卻速度;熱處理實驗
Date:	2021-08-03
Issue Date:	2021-12-07 13:17:04 (UTC+8)
Publisher:	國立中央大學
Abstract:	內窺鏡施夾器是一種用於膽囊切除和多種其它腹腔鏡微創手術用器械，在手術過程中短暫侵入人體；而其主要作用是透過夾爪與促動器配合，確保鈦釘能確實將血管結紮達到止血目的[1]。而其中關鍵產品便是夾爪，特性必需具有足夠回彈力及降伏強度，確保鈦釘閉合後促動器可往後回到原始位置，並在如此往復作動情況下不會產生疲勞失效；進而導致鈦釘未能確實將血管結紮止血影響到手術進行。故夾爪材質通常選用麻田散鐵系不銹鋼，具有良好的機械性能和中等的耐腐蝕性，並可透過淬火與回火的熱處理機制，獲得夾爪產品最重要回彈力及降伏強度機械性質。本文研究的目的是分析淬火冷卻過程中，冷卻速度快慢對麻田散鐵系不銹鋼的組織、力學性能和腐蝕性能的影響。透過研討分析及實際熱處理實驗驗證；進而得到符合產品需求及具備量產能力熱處理參數條件。 ;The endoscope clip applier is an instrument used for cholecystectomy and various other laparoscopic minimally invasive surgery, which temporarily invades the human body during the operation; and its main function is to ensure that the titanium nail can be reliably achieved through the cooperation of the jaw and the actuator. The blood vessel is ligated to achieve the purpose of hemostasis[1]. The key product is the gripper. The characteristics must have sufficient resilience and yield strength to ensure that the actuator can return to the original position after the titanium nail is closed, and will not cause fatigue failure under such reciprocating action. The titanium nail fails to ligate the blood vessel, which affects the operation. Therefore, the gripper is usually made of martensitic stainless steel (MSSs), which has good mechanical properties and moderate corrosion resistance. The most important mechanical properties of the gripper product′s elasticity and yield strength can be obtained through the heat treatment mechanism of quenching and tempering. The purpose of this paper is to analyze the influence of the cooling rate on the microstructure, mechanical properties and corrosion properties of the martensitic stainless steel (MSS) during the quenching and cooling process. Validated through discussion and analysis and actual heat treatment experiments, the heat treatment parameter conditions that meet product requirements and have mass production capacity are obtained
Appears in Collections:	[Executive Master of Mechanical Engineering] Electronic Thesis & Dissertation

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