engineering drawing - definition & functions, line types, letters & numbers, scale, paper...
DESCRIPTION
This presentation is used as my teaching material in Universitas Marsekal Suryadarma, Indonesia in 2013. There are some following chapters contain more of basic engineering drawing theory. Content of this presentations are refer to the reference page, and if anyone find that some contain in my presentation require premission from the relevant, please do not hesitate to contact me. Thanks and enjoy!!TRANSCRIPT
121 1208Engineering Drawing I
Carry Prameswari
Program Studi Teknik PenerbanganFakultas Teknologi Kedirgantaraan
Universitas Dirgantara Marsekal Suryadarma
Topics
• Engineering Drawing Definition and Function• Line Types and Styles• Letters and Numbers• Paper Size• Drawing Title
Engineering Drawing Definition
ThisSide up
Handle With Care
FragileKeep Dry
Engineering Drawing Definition
• A language—a graphical language that communicates ideas and information from one mind to another.
Engineering Drawing Definition
• Most especially, it communicates all needed information from the engineer who designed a part to the workers who will make it.
Engineering Drawing Function
1. Information delivery2. Preservation, archiving, use of information3. Ways of thinking in the preparation of
information
Some Examples of Engineering Drawing
Some Examples of Engineering Drawing
Some Examples of Engineering Drawing
Some Examples of Engineering Drawing
Some Examples of Engineering Drawing
This wiring diagram is also included as an engineering drawing !!!
Engineering Drawing Function
Engineering Drawing Function• 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 angles, such as front, top, side, and so on.
• Dimensions – the size of the object is captured in accepted units.
• Tolerances – the allowable variations from the nominal size for each dimension.
• Material – represents what the item is made of.
• Finish – specifies the surface quality of the item, functional or cosmetic.
Line Types and Styles
Line Types and Styles• Visible lines
– Represents visible edges and boundaries– Continuous and thick (0.5 - 0.6 mm)
• Hidden lines– Represents hidden edges and boundaries– Short-dashed lines and medium thick (0.35 – 0.45 mm)
• Center lines– Represents axes of symmetry– Long and short-dashed and thin (0.3 mm)
• Phantom lines – Indicates imaginary features such as alternate position of moving parts
and adjacent positions of related parts– Long- and double short-dashed and usually thin (0.3 mm).
Line Types and Styles• Dimension and Extension lines
– Used to show the size of an object. Placed between two extension lines and its terminated by arrowheads, which indicates the directions and extent of the dimension
– Continuous lines and thin (0.3 mm)• Cutting Plane Lines
– Used to show where an imaginary cut has been made through the object in order to view interior features
– The line type is phantom and very thick (0.6 – 0.8 mm)– Arrows are placed at both ends of the cutting plane line to indicate the direction of
sight• Section lines
– Used to show areas that have been cut by the cutting plane– Grouped in parallel line pattern and usually drawn at a 450 angle– Continuous line and thin (0.3 mm)
• Break lines– Used to show imaginary breaks in objects, made up of series of connecting arcs– Continuous line and thick (0.5 – 0.6 mm)
Line Types and Styles
Visible Line
Hidden Line
Center Line
Phantom Line
Dimension and Extension Line
Cutting Plane Line
Section Line
Break Line
Line Types and Styles
Line Types and Styles
Line Types and Styles
Line Types and Styles
Line Types and Styles
Section lines
Dimension lines
Phantom lines
Break lines
Center lines
Center lines
Visible lines
Path lines
Dimension lines
Hidden lines
Letters and Numbers
Letters and Numbers
Standards of letters and numbers Clear Uniform ISO 3098/1-1974
Scales
Scales
• A scale is defined as the ratio of the linear dimension of the object as represented in a drawing to the actual dimensions of the same.
• Scales are used to prepare drawing at:– Full size– Reduced size– Enlarged size
Scales• Recommended Scales
• Intermediate scales can be used in exceptional cases where recommended scales can not be applied for functional reasons
Paper Size
Paper Size
A2A1
A3A4
A5A6
A7A8
A0
Paper SizeInternational Standard ISO American National Standard• A0 : 841 x 1189 mm - A : 8.5” x 11”• A1 : 594 x 840 mm - B : 11” x 17”• A2 : 420 x 594 mm - C : 17” x 22”• A3 : 297 x 420 mm - D : 22” x 34 “• A4 : 210 x 297 mm - E : 34” x 44”
Margin• A0 & A1 : 20 mm• A2, A3 & A4 : 10 mm
Drawing Presentation
Drawing Standards –Sheet Format Example C-Size
Drawing Title
UNSURYA
:T.Penerbangan
Question ??
Thank You