查詢結果分析
相關文獻
頁籤選單縮合
題名 | NC木工機械之切削條件對紅櫟木切削面品質之影響 |
---|---|
作者姓名(中文) | 黃彥三; 陳欣欣; | 書刊名 | 林業試驗所研究報告季刊 |
卷期 | 10:2 1995.06[民84.06] |
頁次 | 頁209-216 |
分類號 | 474.1 |
關鍵詞 | 數值控制; 撕裂木理; 起毛木理; 粗糙度; 溝槽; 送材速度; 纖維傾斜角; Numerical control; Torn grain; Fuzzy grain; Roughness; Groove; Feeding speed; Grain angle; |
語文 | 中文(Chinese) |
中文摘要 | NC木工機械可說是目前自動化程度最高的加工機器,因具高度加工精 確度,適於作少量多樣的加工作業,已成家具製造業的寵物。國內家具製造業為 求提升加工水準,改善加工效率,紛紛投資設置此種先進機械,加入生產行列。 然因木材為具有木理走向的生物性材料,為充分發揮NC機械之加工性能,必須 先從瞭解木材的切削性質著手,方能獲致半功倍之效果。本計畫係以紅櫟木為試 材,就NC木工機器作溝槽加工,探討不同刀具直徑(10、12、18 mm),纖維傾 斜角(0°∼118°)及送材速度(1、3、5、 10 m/min)對切削面品質及粗糙度之影響, 盼能提供NC加工作業所需之適正加工條件。茲將所獲結果列舉如下: 1.溝槽加工時加工缺點之發生程度,均有隨送材速度之增大而顯著惡化之趨勢, 此一情況尤以送材速度10 m/min時為甚。 2.切削時溝壁所發生之撕裂木理,以纖維傾斜角在135°∼165°間較為嚴重。 3.溝壁之切削缺點較溝底為嚴重。 4.一般言之,溝壁之切削品質,在順木理切削時以上向切削較佳,但在逆木理切 削時,則以下向切削為優,切削溝之粗糙度亦有相同趨勢。 5.NC木工機械在逆木理之切削情況,可藉降低送材速度,提高回轉數,增加有 效刀數來減輕撕裂木理之發生程度。另一方面,亦可利用更換逆轉刀軸之方式, 將逆木理切削改變為順木理切削,以避免撕裂木理之發生,不過此時在機械購置 時須加留意,使具備一個逆轉刀軸。 |
英文摘要 | Numerically controlled (NC) woodworking machine is a highly automatic machinery which is suitable for production system of small quantity and many items. Many of the domestic furniture maker equipped with this kind of machine to increase the efficiency and accuracy of machining processes. However, the machinabilities of wood depend on its grain direction, and the knowledge of wood cutting is indispensable for effective application of NC machine. In this paper, the effects of machining conditions including feeding speeds, tool diameters and grain directions, upon the quality of machined grooves were examined. Woods of red oak were used for tests. The results obtained are summarized as follows: 1. The defects generated at the grooves became more serious as the feeding speed increased. 2. The torn grain occurred at the walls of grooves was most *serious for grain angle ranging from 1350 to 1650. 3. The defects generated at the wall of groove were more serious than those generated at the bottom of groove. 4. Generally speaking, better quality of the wall of groove was obtained by up-cutting in the case of machining along the grain, but when machining against the grain better quality was obtained by down-cutting. 5. When machining against the grain using NC wood working machine, the extent of torn grain can be reduced by decreasing the feeding speed, increasing the rotational speed of spindle, and increasing the effective number of knives on the cutter head. Furthermore, a reversely rotating spindle can be used to change the against grain cutting to the along grain cutting, so that the torn grain can be avoided. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。