多片縱鋸機結構優化設計

多片縱鋸機在運轉的過程中會受力產生振動，進而產生噪音、共振變形等問題。而立座支撐主軸為承載多片縱鋸機影響切削品質之主要結構部件，若立座結構強度不足，會造成鋸切受力、共振所產生較大的變形時，將進而造成木材鋸切品質不穩定、不良狀況，延伸出材料的浪費、需二次加工木材等現象。本研究透過電腦輔助工程技術的導入，將打樣測試轉化為數值化的分析，尋找結構設計不足部分作為依據，進行結構補強改善，有效益的逐步找尋適當的改善設計。本研究透過有限元素分析軟體，針對多片縱鋸機之立座部件進行靜力載荷分析與模態分析，分析出結構不足的部位，針對結構不足的部位進行結構補強改善。而一般情況下結構剛性與重量約為正比關係，為了不使材料成本、加工時間增加，結構剛性與重量二者之間須找出平衡點，以不增加過多的重量與製造成本為前提，找尋最適當的設計改善方案提升結構剛性。

關鍵字

結構設計；木工機械；多片縱鋸機；有限元素分析；模態分析；結構優化

並列摘要

The vibration will be generated when the multiple rip saw is running. And then generates problems like noise and resonance force deformation. The machine body is the main structural part of loading the gang rip saw. If the intensity of the machine body structure is insufficient, when the ripping force, resonance generate problems, it will make the timber ripping quality become unstable, in a worse condition. Further phenomenon like waste of material and second time wood processing will happen. By importing computer aided engineering technology, turning sample testing to numerical analysis. Looking for structural insufficient part as basis and improve its structural reinforcement. Search for suitable improving design step by step. This research is for static load analysis and modal analysis in machine body of gang rip saw by limited element analysis software. It improves structural reinforcement on structural insufficient part after the analysis of structural insufficient part. The structural stiffness and weight are in direct ratio. We have to find out the balance point of structural stiffness and weight for not increasing material cost and processing time. On the premise of not adding too much weight, look for the most suitable design improving project to promote structural stiffness.