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題 名 | 送材方向對砂光面粗糙度之影響--FFT頻譜分析之應用 |
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作 者 | 陳欣欣; 黃彥三; | 書刊名 | 林業試驗所研究報告季刊 |
卷 期 | 6:2 1991.06[民80.06] |
頁 次 | 頁173-184 |
分類號 | 474.1 |
關鍵詞 | 砂光面; 送材方向; 粗糙度; FFT頻譜; |
語 文 | 中文(Chinese) |
中文摘要 | 木材鉋削加工後所留下之刀痕、起毛等缺點,須藉適當的砂光作業來 消除,在砂光作業中送材方向對材面的粗糙度有關鍵性的影響。本研究利用FFT 頻譜分析儀就剖面波形進行解析,探討不同送材方向在砂光作業中對材面粗糙度 產生之影響。試材選用橡木、粉白柏,以#80,#120, #180,#240號砂帶進行 帶式砂光機之砂磨試驗,試驗結果如下: 1.送材方向及粗糙度測定方向影響材面粗糙度之測定值,同一粒號砂帶不論橡木 或粉白柏粗糙度之測定結果,平均粗糙度(Ra)及中量均為0-90>90- 0>90-90>0- 0,又測定方向與砂痕成90°或45°者均較0°者為大,此現象明顯的顯示出粗糙度 之測定受砂痕之影響較大,受木理之影響較小。 2.不論橡木或粉白柏其中量與Ra之比值皆不因木理走向及粗糙度之測定方向而 有明顯差異。 3.以中量來表示材面粗糙度時,能排除木材組織中環孔之影響,較能顯現材面之 加工粗糙度。 4.橡木由於具有導管,受環孔之影響材面較粗糙,但弦面部分之非環孔部位,則 材面粗糙度與粉白柏之材面非常接近。 |
英文摘要 | The machining defects including knife marks, torn grain and fuzzy grain should be removed by sanding process. The feeding direction with respect to wood grain affects deeply on the roughness of sanded surface. In this study, the influence of feeding direction on the roughness of red oak and lusitanica was evaluated by FFT spectrum analyzer. The grain sizes of sand paper used were #80, #120, #180 and #240. The contact roller of wide belt sander was used for sanding test. The results are concluded as follows: 1.The roughness values wood surface were affected by feeding direction when sanding, and by measuring direction of roughness meter with respect to wood grain. The measured average roughness Ra and median have the following tendency: 0- 90>90-0>90-90>0-0. This phenomena revealed that the influence of sanding scratch on roughness was greater than that of wood grain. 2.The ratio of median to Ra was not affected by grain direction or roughness measuring direction. 3.Using median as a roughness parameter, the effects of ring pores of wood can be ignored and processing roughness can be evaluated better. 4.The surface of oak was rougher than lusitanica because of the existence of ring pores, but the roughness of non-ring pores region of oak was very close to the surface of lusitanica. |
本系統中英文摘要資訊取自各篇刊載內容。