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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/83437

    Title: 聚酰胺(PA9T)之雷射穿透焊接及其加工參數之機器學習分析;Laser Transmission Welding of Polyamide 9T (PA9T) and Machine Learning Analysis of Its Processing Parameters
    Authors: 賴俊霖;Lai, Chun-Lin
    Contributors: 光機電工程研究所
    Keywords: 雷射;穿透焊接;PA9T
    Date: 2020-08-19
    Issue Date: 2020-09-02 15:39:02 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 由於低吸水率,高尺寸穩定性和快速結晶特性,聚酰胺9T在塑膠加工業的應用上大有前景,尤其是電子產品中的絕緣體和包裝材料。本研究旨在探討其雷射焊接特性與雷射焊接參數之間的關係。首先,我們通過實驗研究了四個雷射加工參數,雷射功率、掃描速度、雷射頻率以及重複焊接次數對焊縫尺寸和焊接強度的影響。焊縫尺寸主要由焊道的寬度和深度來表示,而強度則基於剝離測量。結果顯示,隨著雷射功率和焊接次數的增加,焊道的尺寸和強度均增大。但是,過多的雷射能量會導致焊縫汽化,結果觀察到焊接強度的下降。研究的第二部分是通過機器學習獲得焊接性能與加工參數之間的關係。結果顯示,雷射功率是影響焊接強度的最重要因素。;Due to its low water absorption, high dimensional stability and fast crystallization, poly-amide 9T is a widely used plastic material, especially as an insulator or packaging material in electronics and optoelectronics. This study aims to explore the relationship between its laser welding characteristics and laser welding parameters. First, we conducted experiments to study the effects of four laser processing parameters: laser power, scanning speed, pulse frequency, and repetitive welding times on weld size and welding strength.
    Weld size is mainly represented by the width and depth of the weld, while strength is based on the peeling measurements. Results showed that as laser power and number of repetitive welding times was increased, both weld size and strength were increased. However, excessive laser energy caused cause vaporization of the weld that degraded the polymer, and as a result, a decrease in weld strength was observed. The second part of this study is to obtain the relation-ship between the welding performance and the processing parameters through machine learning. The results showed that laser power was the most important factor affecting the strength of the weld.
    Appears in Collections:[光機電工程研究所 ] 博碩士論文

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