工程制圖(雙語(yǔ))講義-note1-資料下載頁(yè)
2025-02-21 16:53本頁(yè)面
【正文】 d a layout. Margin and Border The vertical layout and horizontal layout are shown in Figures as below: If the filing margin for perforation is necessary, a=25, A0~A2:c=10, A A4:c=5 Margin and Border If the filing margin for perforation is not necessary, then A0~A1:e=20mm, A2~A4:e=10mm Title Block is a Standard for title block. The title block for study drawing and detail drawing are suggested in Figures as below: Freehand Sketches (1) Drawing Lines: Drawing Angles: Freehand Sketches (2) Drawing Circles: Drawing Ellipses: Drawing a Pentagon O OAH FGABC DEOHDrawing a Hexagon O O OAB CDEFAB CDF E EFDCBA OEllipse Construction A BCDO ODCBAO1O2E EO2O1A BCDOODCBAO1O2O3O4O3O4O4O3O2O1A BCDOT1 T2T3 T4T1 T2T3 T4 T4T3T2T1ODCBAO1O2O3O4Drawing Tangent Arcs (1) 30 T T HK Drawing Tangent Arcs (2) HK HK Drawing Tangent Arcs (3) T T Basic Dimension () Basic Rules of Dimension ?Dimensions on the drawing indicate the true size of the object irrespective of the scale and graphical accuracy. ?Dimensions in machine drawings are given in millimeters without adding the abbreviation mm. ?Each dimension in drawing must be given only once. Dimensioning Technique Approx. gap Extension line Dimension line 3mm Approx. 8mm 10mm Dimensioning Technique NO! NO! NO! Dimensioning Technique CORRECT! NO! Dimensioning Technique Directions of Numbers AVOID IF POSSIBLE Dimensioning Angles Dimensioning Circles Dimensioning Arcs Homework: Homework: LOGO LOGO 演講完畢，謝謝觀看！
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