Engineering Drawing - Assignment

Download Engineering Drawing - Assignment

Post on 05-Dec-2014

61 views

Category:

Documents

3 download

Embed Size (px)

DESCRIPTION

Engineering Drawing

TRANSCRIPT

MAKTAB KEJURUTERAAN JEFRI BOLKIAH KUALA BELAIT NEGARA BRUNEI DARUSSALAM

ASSIGNMENT NO. ONESESSION 2012/2013Please Tick ( ) First Attempt:

Re-Do:

TITLE: ENGINEERING DRAWING FUNDAMENTALS, GEOMETRICAL

CONSTRUCTION, ORTHOGRAPHIC & PICTORIAL PROJECTIONS AND PATTERN DEVELOPMENT

UNIT TITLE: ENGINEERING NAME/ID CARD NUMBER: GROUP/LEVEL: DATE GIVEN:

DRAWING

MOHAMMAD ZULHAFIZZAN BIN ASMALI / 01-062499

DIPLOMA YEAR 1 MARINE ENGINEERING (A)DATE SUBMITTED:

FEBRUARY 2013

MARCH 2013

Assessor: FINAL MARK Signature: Internal/External Verifier. Signature: Date. Date.

%

Engineering Drawing 2 Assignment 1

TABLE OF CONTENT

Engineering Drawing | Prepared By: Mohd Zuhafizzan Bin Asmalil

Engineering Drawing 3 Assignment 1 JEFRI BOLKIAH COLLEGE OF ENGINEERING BDTVEC Diploma in Marine Engineering (2012/2013) Introduction Engineering drawings convey accurate information about shape in a way which words cannot. This language of lines, signs and symbols has to be learned before it can be expressed on paper. When it is being expressed, it has to be understood by others. But in order for it to work effectively, everyone concerned must interpret the drawings in the same way so that there is uniformity in its interpretation. So the British Standard Institution has prepared a booklet BS 308:1972 having all the standards and conventions to be used. This standard is now adopted for the preparation of drawings used in the engineering industry. Basically, drawing is a principle means of communication in engineering. It is the method used to impact ideas and convey information and is often said to be the language of the engineer. It is an international language but it has its own rules and conventions. The purposes of studying Engineering Drawing: Develop the ability to produce simple Engineering Drawing and sketches based on current practice. Develop the skill to read manufacturing and construction drawing used in industry. Develop a working knowledge of the layout of plant and equipment. Develop skills in abstracting information from calculation sheets and schematic diagrams to produce working drawings for manufacturers, installers and fabricators.

Drafting Equipment: The Drawing Board The Tee-Square The Set-Square 30-60 degree Triangle and 45 degree Triangle Protractor (Half Discs Protractor and Circular protractor) Drawing Instrument Set (Typical Drawing sets and Compass and Divider) Pencils (Drafting Pencil) Eraser/Rubber Drafting TapeEngineering Drawing | Prepared By: Mohd Zuhafizzan Bin Asmalil

Engineering Drawing 4 Assignment 1 Task 1 Describe the followings: Engineering Drawing used as a mean of communication. There are many different ways of communicating ideas, information, instruction etc. They can be transmitted by signs or gestures, by words of mouth, in writing or graphically. In an industrial context the graphical method is commonly used and communication being achieved by means of engineering drawings. Engineering Drawing is a graphical language used by those concerned with the constructive arts e.g in the manufacturing of: Machinery, Structure, Ships, Aircraft and so on. If oral and writing communication only were used when dealing with technical matters, misunderstanding could arise, particularly in relation to shape and size. However, these interpretation difficulties had been eliminated by using graphical communication through engineering drawing. For the communication to be effective, everyone concerned must interpret the drawings in the same way. Only then will the finished product be exactly as the designer wants it.

Orthographic Projection (compare between first and third angle projections). In the engineering industry, communication between the drawing officer and the workshop is achieved mainly be means of engineering drawings. The principle method used to prepare these drawings is known as Orthographic Projection. Orthographic projection is the representation of three-dimensional components on the flat surface (drawing sheet) in two-dimensional form. At least two orthographic views are required to indicate fully the shape and size of the component. If the component is a complicated one then more then two views are shown to aid understanding. There are two type of Orthographic Projection used: 1. First Angle Orthographic Projection English Projection 2. Third Angle Projection American ProjectionEngineering Drawing | Prepared By: Mohd Zuhafizzan Bin Asmalil

Engineering Drawing 5 Assignment 1 Comparation of First angle and Third angle projection

I.

First Angle Projections.

II.

Third Angle Projections.

Engineering Drawing | Prepared By: Mohd Zuhafizzan Bin Asmalil

Engineering Drawing 6 Assignment 1 Types of Lines used in Engineering Drawing. One of the most important factors in good drawing is the quality of line work. It is essential that lines should be of uniformed thickness and blackness.

Type of Line Continuous (thick) Continuous (thin)

Example

Application Visible outlines and edges. Fictitious outlines and edges dimension and leader lines hatching outlines of adjacent parts outlines of revolved sections. Limits of partial views or sections when the line is not an axis. Hidden outlines and edges. Centre lines extreme positions of moveable parts. Cutting planes.

Continuous Irregular (thin)

Short Dashes (thin) Chain (thin)

Chain (thick at ends and at changes of direction, thin elsewhere)

Chain (thick)

Indication of surfaces which have to meet special requirements. Arrow head must be sharp, black and fill in.

Dimension (thin line)

Engineering Drawing | Prepared By: Mohd Zuhafizzan Bin Asmalil

Engineering Drawing 7 Assignment 1 Pictorial Drawing.

A component may be represented graphically in various ways. On the Pictorial Drawing, only one view is used to visualization the shape of a component. This type of projection not being use for communicating detailed instructions for manufacture. A pictorial drawing is a quickly produced approximately scaled representation of a component. It is more like a picture rather than an accurately scaled line drawing. There are many different types of pictorial representation. Two of the most commonly used are known as Isometric Drawing and Oblique Drawing. i. Isometric Drawing.

ii.

Oblique Drawing.

Engineering Drawing | Prepared By: Mohd Zuhafizzan Bin Asmalil

Engineering Drawing 8 Assignment 1 Task 2

Engineering Drawing | Prepared By: Mohd Zuhafizzan Bin Asmalil