輕量化節能聚乳酸元件耐磨性研究：Part 1－不同垂直負荷和往復速度下對元件摩擦性能的探討

節能減碳已成為全國必然重要的課題，而輕量化在許多的製程設備上可帶來更多製程節能的優勢。因此3D列印製作輕量化元件相當具有節能優勢。本研究探討3D列印PLA元件的耐磨性，評估元件的使用能力與建立適當的應用範圍，可減少元件不恰當使用所造成的損傷及浪費。在摩擦過程中，摩擦係數的明顯變化可以明確分為三個階段，這與不同負荷和往復速度等操作參數有關下，摩擦介面發生的磨耗有關。磨耗隨垂直荷的增加而顯著增加，但當往復速度增加時磨耗會更早發生。無論是增加負荷還是提高往復速度，由於往復摩擦過程中摩擦熱的持續影響，上試片比下試片更容易發生磨耗和軟化。這個結果導致上市片之磨耗表面上的黏附的磨耗顆粒增加。由於摩擦介面處的嚴重磨耗和材料的轉移，摩擦係數逐漸顯著增加。隨著溫度繼續升高接近PLA的軟化溫度，上市片軟化區更容易發生黏附摩擦，因此摩擦係數變小。由上面結果可評估PLA製作的元件在使用上必需小心摩擦熱造成元件強度的下降，未來將進一步以的實驗探討材料紋路方向與摩擦溫度對磨耗性質的影響。

關鍵字

3D列印； PLA元件；摩擦係數；磨耗

並列摘要

Energy saving and carbon reduction have become an inevitable and important topic in the country, and light weight can bring more advantages of process energy saving in many process equipment. Therefore, the production of lightweight components by 3D printing has considerable energy-saving advantages. This study explores the wear resistance of 3D printed PLA components, evaluates the use ability of components and establishes appropriate application ranges, which can reduce damage and waste caused by improper use of components. During the friction process, the obvious change of the friction coefficient can be divided into three stages, which are related to the wear of the friction interface under different operating parameters such as load and reciprocating speed. Wear increases significantly with increasing vertical load, but wear occurs earlier when reciprocating speed increases. Whether it is to increase the load or increase the reciprocating speed, due to the continuous influence of friction heat during the reciprocating friction process, the upper test piece is more prone to abrasion and softening than the lower test piece. This result leads to an increase in adhering abrasive particles on the abrasive surface of the marketed sheet. Due to severe wear and material transfer at the friction interface, the coefficient of friction gradually increases significantly. As the temperature continues to rise close to the softening temperature of PLA, adhesive friction is more likely to occur in the softened area of the listed sheet, so the friction coefficient becomes smaller. From the above results, it can be estimated that the components made of PLA must be careful about the decrease in the strength of the components caused by frictional heat. In the future, further experiments will be conducted to explore the influence of the material texture direction and friction temperature on the wear properties.

並列關鍵字

3D printing ； PLA ； friction coefficient ； Wear

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