TITLE BLOCK The position of the title block should be within the drawing space such that the portion of the title block containing the identification of the drawing (registration number, title, origin, etc) is situated in the bottom right-hand corner of the drawing space, both for sheets positioned horizontally (Type X) or vertically (Type Y). The direction of the viewing of the title block should correspond, in general, with that of the drawing.
TYPES OF DRAWINGS 1.SINGLE PART DRAWING.SINGLE PART DRAWING 2.COMMON DRAWING.COMMON DRAWING 3.ASSEMBLY DRAWING.ASSEMBLY DRAWING 4.WELDING DRAWING.WELDING DRAWING 5.CASTING DRAWING. 6.FORGING. 7.SHEET METAL. 8.PIPING.PIPING 9.CIRCUIT DIAGRAMS.CIRCUIT DIAGRAMS. 10.PICTORIAL DRAWING.PICTORIAL DRAWING 11.PLANT LAYOUTS.PLANT LAYOUTS. Exploded assembly drawing.Exploded assembly drawing Schematic assembly drawing. Drawing for installation. Drawing for catalogue Patent drawing.
Imaginary lines of intersection. Dimension lines. Projection lines. Leader lines. Hatching, short center lines. TYPES OF LINES:- Visible outlines General applications- Continuous thick Continuous thin Freehand. Limits of partial and Interrupted views Continuous thin Straight with zigzag. Long break line. Dashed thick. Hidden outlines. Hidden edges. A B C D E
TYPES OF LINES:- General applications- Dashed thin. Hidden outlines. Hidden edges. Chain line Center lines. Lines of symmetry. Line of trajectories. Chain thin, thick at ends and changes the direction Cutting planes. Thick chain line Indication of lines or surfaces to which special requirement applies. F G H J
LinesPencil Initial work and construction lines. Outlines, dotted lines, section plane lines, dimension lines, arrowheads Centre lines, section lines H 2H 3H or 4H TYPES OF LINES:- General applications- Thin chained double Dashed. Outlines of adjacent parts. Alternative and extreme positions of movable parts. Centroidal lines. Initial outlines prior to forming. Parts situated in front of cutting plane. K
AContinuous thick BContinuous thin C Freehand DContinuous thin Straight with zigzag. EDashed thick. FDashed thin. GChain line HChain thin, thick at ends and changes the direction JThick chain line KThin chained double Dashed
SECTIONS AND HATCHING Hatching is generally used to show areas of sections. The simplest form of hatching is usually done by drawing continuous thin lines at a convenient angle, preferably 45º to the principal outlines or lines of symmetry of the sections. Separate areas of a section of the same component shall be hatched in an identical manner. The hatching of adjacent components shall be carried out with different directions or spacing.
Thin Sections - Thin sections may be shown entirely black a space of not less than 0.7 mm must be left between adjacent sections of this type. Arrangement of Successive Sections
To save time and space, symmetrical objects may be drawn as a fraction of the whole
In cases where the scale is so small that details of the feature cannot be shown or dimensioned, the feature of the part may be framed by a continuous thin line (type B) and identified by a capital letter