Engineering drawings and designs
You can learn how to make engineering drawings according to given design using this tutorial.
Engineering drawings means graphical represent of data which are using in engineering work. It can be a paper drawn(manual) or drawn by using computers .These drawing can be related to various fields, such as civil Engineering drawings,mechanical Engineering drawings,electrical Engineering drawings,etc…In a Engineering drawings commonly accuracy, clearness, and efficiency are expected. Engineering drawings are drawn by especially trained persons called “draftsman” or “draft person”.
We will called “sketches” and “drawing” as one. “Sketches” generally means freehand drawing (not drawn to a scale). “Drawing” usually means using drawing instruments, from compasses to computers to bring precision to the drawings.you can just get a general idea of the language of technical drawings. Before starting on any technical(engineering)drawings, let’s get a good idea of space around you (space means background) , if you should show everything what you see,you have to get a complete understanding of the objects should be essential.
You have to understand how objects can represent in a paper.it means you have to think how the object(model)should be seen in real world
look at the example
This is a freehand sketch of a machine part drawn using raw pencil lines. This drawing just show the shape of the object with its physical appearance,not mentioned size of the object.If a object shows in a drawing or in a sketch without size we called “non scaled drawing”. It means if we can not say how big is the particular object(it can be bigger than a bus, or it can be smaller than a apple)
A drawing or a sketch with a idea of size of an object is called as “scaled drawing”.It means drawing or sketch says how big is the object
Line styles and types
n an engineering drawings there are variety of line styles to show objects.Types of lines
continuous lines – continuous lines used to show edges directly visible from a given angle.
hidden lines – hidden lines are short-dashed lines used to show edges that are not directly visible
section line (cutting edges) – cutting edges are shown in thin, medium-dashed lines, or thick alternately long- and double short-dashed that used to define sections plane
break line – break lines are used to show work is continuing but it can take to the frame
dimension lines – dimension lines are thin continues lines which are used to show dimensions
