Qamarul ed assignment
- 1. بلقيهجفريﮐجروترأنﻣﮐتب MAKTAB KEJURUTERAAN JEFRI BOLKIAH KUALA BELAIT NEGARA BRUNEI DARUSSALAM ASSIGNMENT 1 SESSION 2012/2014 Please Tick ( ) First Attempt: Re-Do: TITLE: ENGINEERING DRAWING FUNDAMENTAL,GEOMETRICAL CONSTRUCTION, ORTHOGRAPHIC & PICTORIAL PROJECTIONS AND PATERN DEELOPMENT UNIT TITLE: ENGINEERING DRAWING NAME/ID CARD NUMBER: QAMARUL ARIFIN BIN HAJI AFFANDY (01-072604) GROUP/LEVEL: Diploma Year 1 Marine Engineering (A) DATE GIVEN: 6 / 2 /2013 DATE SUBMITTED: 4 / 4 /2013 QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 1
- 2. TABLE OF CONTENT No. Content Page 1 Page cover 1 2 Table of Content 2 3 Introduction 3 4 Engineering drawing used 4 as a mean of communication 5 Orthographic Projection 5 6 Types of Lines used 6 7 Pictorial Drawing 7-8 8 Conclusion 9 9 References 10 QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 2
- 3. INTRODUCTION ON ENGINEERING DRAWING This assignment was given to us by Sir Saini before the school holiday . This assignment sole purpose is to teach us on how to draw isometric projection , oblique projection , perspective projection. An engineering drawing is a document that communicates a precise description of a part. This description consists of pictures, words, numbers and symbols. Together, these elements communicate part information to all drawing users. Engineering drawings are often referred to as “blueprints” or “blue lines”. It is used to fully and clearly define requirements for engineered items and is usually created in accordance with standardized conventions for layout, nomenclature, interpretation, appearance, size. QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 3
- 4. ENGINEERING DRAWING USED AS A MEAN OF COMMUNICATION Engineering drawing is not only the province of the draftsperson. It is the language of the engineer. It is their means of developing and recording their ideas, and conveying them to others. The best ways to communicate one's ideas is through some form of picture or drawing. This is especially true for the engineer. Words are not the natural language of engineers. Drawings are their prose, mathematics their grammar and differential equations their poetry. Engineering graphics is an essential course offered at an early stage in engineering education and is used as a support in other courses. The details of construction or fabrication are conveyed with the help of drawings showing top view, front view , side view and sectional view which are required by architect etc. QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 4
- 5. ORTOGRAPHIC PROJECTION Orthographic projection (or orthogonal projection) is a means of representing a three-dimensional object in two dimensions. It is a form of parallel projection, where all the projection lines are orthogonal to the projection plane,resulting in every plane of the scene appearing in affine transformation on the viewing surface. It is further divided into multiview orthographic projections and axonometric projections. • FRONT VIEW • TOP VIEW • SIDE VIEW (left and/or right hand view) • BASE/SECTIONAL VIEWS First angle Third angle The plan is BELOW the front view. The plan view is ABOVE the front view. The right-hand side view is on the left- The right-hand side view is on the right- hand side of the front view. hand side of the front view. The left-hand side view is on the right- The left-hand side view is on the left-hand hand side of the front view. side of the front view. QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 5
- 6. TYPES OF LINES USED IN ENGINEERING DRAWING The diagram below shows the types and thickness of lines used for various purposes. Each line is used for a definite purpose and it should not be used for anything else. Lines can also be classified by a letter classification in which each line is given a letter. QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 6
- 7. PICTORIAL DRAWING Pictorial sketches often are more readily made and more clearly understood than are front, top, and side views of an object. Pictorial drawings provide a 3D image to help understand a drawing The most common pictorial drawing is the Isometric drawing. The isometric view provides a likeness of the 3D object and should be drawn to provide as much detail as possible. The lengths of lines are generally the true length of the object. (Sometimes the view may be scaled) Perspective drawings provide the most accurate view of an object but the measurements are not true lengths. Axonometric (planometric) views are often used on house plans to show room interiors. (a) Isometric projection (b) Oblique projection (c) Perspective projection (d) Planometric projection QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 7
- 8. ISOMETRIC PROJECTION A trained eye and good imagination will be able to understand the three dimensions of an object. Several orthographic views on different planes are to be drawn to understand fully an object. But in isometric projection, only one view on a plane is sufficient to represent an object in its realistic appearance. Anyone can understand by looking at a view what the job is by isometric projection. OBLIQUE PROJECTION Oblique projection may be illustrated in different ways, according to the choice of axes, length of inclined side and direction of looking the side. As compared with isometric projection, in oblique projection, one side of the object is horizontal, second side is vertical and the third side is inclined at 30Oor 45O to the horizontal. The lengths of the horizontal and vertical sides are equal to the actual lengths, but the length of the inclined side is taken as three-fourth or half of the actual length. PERSPECTIVE PROJECTION Perspective projection or perspective drawing is the representation of an object on a plane surface, called the picture plane, as it would appear to the eye, when viewed from a fixed position. It may also be defined as the figure formed on the picture plane when visual rays from the eye to the object cut the picture plane. Perspective is mainly used in architecture. By means of perspective, the architecture is able to show how an object would appear when constructed. QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 8
- 9. CONCLUSION With my skills and what I have studied about engineering so far, I have finished all the drawings given neat and clean. I also did research on the internet to look for more information about engineering drawing, I also seek help from my friends to assist me in my drawings so that there will no be any unforced error. QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 9
- 10. REFERENCES INTRODUCTION http://www2.ivcc.edu/perez/what_what_is_an_engineering_draw.html ENGINEERING DRAWING USED AS A MEAN OF COMMUNICATION http://edu-support.blogspot.com/2012/07/engineering-drawing-and- workshop.html http://civilengineer.webinfolist.com/graphics.htm ORTHOGRAPHIC PROJECTION http://engineeringtraining.tpub.com/14069/css/14069_162.htm TYPES OF LINES USED http://edu-support.blogspot.com/2012/07/basic-engineering-drawing- conventions_09.html PICTORIAL DRAWING http://encyclopedia2.thefreedictionary.com/Pictorial+drawing http://jaime123.edublogs.org/2011/08/23/pictorial-drawings/ QAMARUL ARIFIN BIN HAJI AFFANDY DIP MRE A Page 10