Table of Contents
What should an engineering drawing include?
It is usual for engineering drawings to include a series of projections showing different angles of the item, as well as sections, ‘exploded’ views and so on. Projections may create two dimensional or three dimensional representations of the item.
What dimensions are included in an engineering drawing?
Size (S) dimensions are used to define length, width, height, diameter of circles and radius of arcs. 2.
What elements are generally needed in an assembly drawing?
Assembly drawings may include instructions, lists of the component parts, reference numbers, references to detail drawings or shop drawings, and specification information. However, they should not duplicate information provided elsewhere, as this can become contradictory and may cause confusion.
What are the engineering drawing tools and equipment used?
The instruments used in engineering drawing are: Drawing sheet. Drawing board. Mini drafter. T square. Compass. Divider. Set squares. Clinograph.
What is a machine drawing?
(d) Machine Drawing — Machine drawing may be defined as the representation of a machine component or machine by lines according to certain set rules. A machine drawing generally gives all the external and internal details of the machine component from which it can be manufactured.
How engineering sketches and drawings convey designs?
The purpose of design/engineering drawing is to communicate your ideas to other people in the simplest form possible. Your drawings don’t need to be elaborate or fancy. They just need to get your ideas across to others through simple shapes and symbols. Start your drawing training by practicing the simplest of shapes.
What are the 3 types of drawing dimensions?
The basic types of dimensioning are linear, radial, angular, ordinate, and arc length.
How do you write dimensions in engineering drawing?
Dimension lines should be spaced uniformly throughout the drawing. They should be at least 3/8″ from the object outline and 1/4” apart. 13. No line of the drawing should be used as a dimension line or coincide with one.
What is an engineering assembly?
the act of assembling or the state of being assembled. 3. ( Mechanical Engineering) the process of putting together a number of parts to make a machine or other product. 4. ( Mechanical Engineering) machinery a group of mating components before or after fitting together.
How is a detail drawing different from an assembly drawing?
Detail drawings provide detail descriptions of a part for construction or fabrication, whereas assembly drawings emphasis how the part is to be used. Detail drawings are fully dimensioned. Assembly drawings show the parts together in assembly.
What is a detailed drawing engineering?
A detail drawing is a tool used by engineers to communicate their designs to manufacturers and to preserve their work for future generations. To facilitate the sharing of design information, engineers have created uniform standards, protocols and tools. One of these standards is called the ANSI Y14.
What is the example of assembly drawing?
A sub-assembly drawing is an assembly drawing of a group of related parts, that form a part in a more complicated machine. Examples of such drawings are: lathe tail-stock, diesel engine fuel pump, carburettor, etc.
Does assembly drawing need more views?
A general assembly drawing should include a part list with quantities, one or more views of the product and its components, and necessary dimensions.
What scale are assembly drawings?
A room plan at 1:50. A component drawing at 1:5. An assembly drawing at 1:2.
How would you store technical drawings and equipment instruments?
Storing Equipment and Drawings Tee squares should be placed in properly made racks, which make sure that the drawing edges are not damaged and that their two parts do not become separate. Set squares must be kept in a clean condition.
Why is drawing instrument important in technical drawing?
Drafting tools may be used for measurement and layout of drawings, or to improve the consistency and speed of creation of standard drawing elements. Various scales and the protractor are used to measure the lengths of lines and angles, allowing accurate scale drawing to be carried out.
What is assembly in machine drawing?
A drawing which displays the parts of a machine or a machine unit assembled in their relative working positions is known as assembly drawing.
What is the difference between drawing and engineering drawing?
Drwaing is free hand and involves more of sketching and painting of abstract and non abstract objects. Engineering drawing is 3D representation of structures and engineering objects which is used across design and manufacturing of automotive products And widely used across Mechanics and Robotic processes.
How technical drawing is prepared in CNC machining?
Step 1. Define the most important views and place the relevant orthographic in the center of the drawing, leaving enough space between them to add dimensions. Step 2. If your part has internal features or complex and difficult to dimension areas, consider adding section views or detail view accordingly.
How are sketching and technical drawings related?
Technical sketching differs from technical drawing: technical sketches are made with a pencil, paper, and an idea, while technical drawing advances a sketch to follow specific technical drawing guidelines that employ the use of tools, such as isometric graph paper and the aid of a computer.
What is sketching in engineering drawing?
“Sketching” generally means freehand drawing. “Drawing” usually means using drawing instruments, from compasses to computers to bring precision to the drawings. This is just an introduction.
What are the main features of professional engineering drawing?
Engineering drawings: common features 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, etc. Dimensions – the size of the object is captured in accepted units. tolerances – the allowable variations for each dimension.
What is RF in engineering drawing?
Explanation: Representative fraction is the ratio of the length of the object represented on drawing to the actual length of the object represented. So the representative factor is that dimension in drawing to actual dimension. R.F.
What are the two types of dimensions in engineering?
There are two types of dimensioning systems one is Aligned system and another is Unidirectional system.
What is sectioning in engineering drawing?
A ‘section drawing’, ‘section’ or ‘sectional drawing’ shows a view of a structure as though it had been sliced in half or cut along another imaginary plane. Plan drawings are in fact a type of section, but they cut through the building on a horizontal rather than vertical plane.
