Drafting in tle iv
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The document discusses drafting tools and materials. It describes common tools used for drawing like triangles, T-squares, compasses, protractors, rulers, and French curves. These tools are made of materials like wood, plastic and metal. The document also outlines materials used for drafting like drawing paper, tapes, tacks and colors. It emphasizes the importance of proper care and storage of drafting tools to avoid damage.
Drafting in tle iv
- 1. DRAFTING
- 2. The systematic representation and dimensional specification and mechanical and architectural structure. The creation of artistic pictures or diagrams.
- 3. Drawing Is learning the skill to train our hands in order to develop our abilities and interests to draw
- 4. QUALIFYING SKILLS THAT ANY DRAWER MUST POSSESS: He must have the ability to interpret a working drawing. He must know how to read symbols. He must understand the alphabet of lines and drawing specifications. He must have the ability to draw different styles of letters. He should know how to draw and apply different shades in coloring.
- 6. A. Tools, Instruments and Equipment 1. Triangles – they are usually made of transparent plastic which are used for drawing oblique and vertical lines.
- 7. 2. Triangular Scales -English Scales -Metric Scales -they are made of wood, plastic or metal, which are use for drawing an object on a paper by scaling the sizes.
- 8. 3. Drawing Board A portable board made of softwood, wherein a drawing paper is fastened on top. Their working edge should be perfectly straight and their surface is trim and smooth.
- 9. 4. Protractor Is used for measuring and laying out arcs and circles as well as angles that cannot be measured with either the 45°or the 30° x 60° triangles. It is half-circle shaped instrument, made of transparent plastic used for guiding a draftsman in drawing different angles.
- 10. 5. Compasses Is used for drawing arcs and circles. It is made of the lower portion of the pencil leg. It is removable and to e replaced when needed. The pen and the needle point leg are held together by a handle.
- 11. 6. T-square Is an instrument used for drawing horizontal lines. It is also used to support the triangle for drawing vertical or inclined line Are made of wood, plastic or metal.
- 12. Two Main Parts of T-square The head The blade Three kinds of Tsquare -fixed heads -removable head -adjustable head
- 13. 7. Drawing Set It is a kit which consists of a compass, divider, ruling pen, compass pen and pencil leads. It is used for drawing arcs and circles and inking them.
- 14. 8. French Curve It is an instrument which is usually made of transparent plastic and used for drawing irregular curves like an ellipse.
- 15. 9. Ruler It is made of wood, plastic or metal used for measuring purposes and for drawing and for drawing a straight line. The edge of the ruler should be straight.
- 16. Materials
- 17. 1. Drawing Paper It should have a smooth surface when erasures are made.
- 18. 2. Tapes and Tacks There are varieties of tapes and tacks available in the store. They are used for fastening the drawing paper on the drawing board.
- 19. 3. Colors and water colors They are coloring materials made of pigment, dyes, and others. they are used for coloring drawings.
- 20. Proper Care of Drafting and other Materials Pencils should be sharpened whenever they show signs of dullness. Never use the edge of T-square and triangles to cut paper along its working edge. A slight nick at the edge will ruin the T-square. Wipe off the surface and edges of your Tsquare and triangles before and after using them. Avoid dropping your compass, divider and technical pens. Provide a place to hang individually your Tsquares, triangles, protractors and French curves after using them.
- 21. Provide a separate container for drawing pencils, compasses, dividers, rolling pens and technical pens. Wash the nibs of your compass after using them. Dry the compass nibs and needlepoint after washing. Store them in a dry place. This will avoid rust formation on the instrument’s parts. Keep tools and equipment in their proper place after using them.