ENGINEERING GRAPHICS Engr. Benecio G. Rufin, Jr.
INTRODUCTION Engineering Graphics A way to visually represent ideas for engineering designs. It's the most commonly used technique for evaluating and communicating different design concepts in the prototype stage.
INTRODUCTION A drawing is a graphic representation of a real thing, an idea, or a proposed design for later manufactures or construction. Engineering drawings are usually created in accordance with standardized conventions for layout, nomenclature, interpretation, appearance.
INTRODUCTION Engineering drawings are often referred to as blueprints or blue lines. -can now be produced using computer technology. Technical Drawing is the process of producing engineering drawings and the skill of producing them.
INTRODUCTION Drawings convey the following critical information: Geometry – the shape of the object; represented as views; how the object will look when it is viewed from various standard directions, such as front, top and side views.
INTRODUCTION Drawings convey the following critical information: Dimensions- the size of the object is in accepted units. Tolerances- the allowable variation for each dimensions.
INTRODUCTION Drawings convey the following critical information: Material- represents what the item is made of. Finish- specifies the surface quality of the item, functional or cosmetic.
INTRODUCTION Types of Drawing Line Drawing – the objects are constructed from lines out of simple figures or geometric shapes. Pictorial Drawing – the objects are shown as they would appear in a photograph. Working Drawings – drawings with two or more views used to give complete information about the object.
LETTERING Styles of Letters SINGLE STROKE GOTHIC LETTERING STYLE - all letters in the alphabet are formed with a series of single strokes that are as wide as the pencil point or speedball pen/ordinary drawing pen. ROMAN LETTERS - all letters having accented strokes or consisting of heavy and lights or thick and thin lines.
LETTERING Styles of Letters ITALIC LETTERS - all slanting letters TEXT LETTERS - all styles of old English, German text, Bradley text or other various trade names.
LETTERING General Divisions of Letters Drawn or built-up letters – letters often used on big advertisements Written or single stroke letters – exemplified in laboratory exercises
LETTERING General Proportion of Letters Normal Letters – letters are drawn neither too narrow nor too wide. Compressed Letters – letters are narrow in width in proportion to the height and are used when space is limited. Extended Letters – letters are wider than the normal letters and are used when the space is very wide.
LETTERING • GUIDELINES • must be made fine, light, straight, and parallel with cap line and base line identified for upper case letters and with waist line and drop line for lower case letters.
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