How to read engineering drawings ?

Best answer:

1. . Visible line: Indicates an edge is visible in relevant view.
2. . Hidden line: Indicates the edge is behind a face.
3. . Phantom line: Mostly used to indicate an alternate position of a moving part.
4. . Centre lines: drawn to indicate the exact geometric centre of the assembly.

How do you read engineering drawing tolerances?

FAQ

What are the 4 basic components of an engineering drawing?

1. What is Engineering drawing?

1. Orthogonal views.
2. Dimensions.
3. Scale.
4. Projection.
5. Drawing Standards.
6. Name/ Title of the drawing.
7. Tolerances.

How do you read and interpret drawings?
Follow projection lines to read most dimensions. Lines drawn up or down indicate length and width, while those out to the side indicate height. Some drawings might place the dimensions directly on the side of the object if it’s clear in the drawing what side that dimension refers to.

How do you explain engineering drawings?
Engineering drawings are used to communicate design ideas and technical information to engineers and other professionals throughout the design process. An engineering drawing represents a complex three-dimensional object on a two-dimensional piece of paper or computer screen by a process called projection.

What are the symbols used in engineering drawing?
Basic types of symbols used in engineering drawings are countersink, counterbore, spotface, depth, radius, and diameter. Here are more commonly used engineering drawing symbols and design elements as below.

What is the 3 most important parts of an engineering drawing?

1. 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.
2. Dimensions – the size of the object is captured in accepted units.
3. Tolerances – the allowable variations for each dimension.

What are the 5 types of technical drawing?
3D drawings (isometric, perspective) • Exploded-view 3D drawings • Complete working drawings • Detail drawings (2D orthogonal projections) •Diagrams are another form of technical drawing with looser, less universal standards.

What are the fundamentals of technical drawing?
Technical sketches are based on a series of standardized conventions, comprehensible to anyone, even when not accompanied by ideograms… Thus, a continuous, strong stroke indicates visible contours, regular dots convey hidden edges, alternating strokes and dots symbolize a symmetry axis, etc.

How do you master a engineering drawing?

1. Tip #1: Dimension only critical & measurable features.
2. Tip #2: Communicate hole tapping needs with thread size and depth.
3. Tip #3: Consolidate call-outs when multiples of the same feature exist in a view.
4. Tip #4: Communicate assembly intent of critical features.

What information is contained in an engineering drawing?
Engineering drawings (aka blueprints, manufacturing blueprints, prints, manufacturing prints, dimensional prints, drawings, mechanical drawings, and more) are a rich and specific outline that shows all the information and requirements needed to manufacture an item or product.

How do you read a drawing radius?
The letter ‘R’ as shown is used widely in drawings and is short for the word Radius. Radius is the distance from the centre point of a circle to the circumference of a circle. It is always placed in front of the number. For Example R50, means the circle has a radius of 50mm.

What is Ø in engineering?
Science, technology and engineering Slashed zero (0̸), a representation of the number 0 (zero) to distinguish it from the letter O. The symbol for diameter (⌀), U+2300 in Unicode.

What are the 7 categories of technical drawing?

1. Technical Drawings and their Types.
2. General layout drawing.
3. Layout drawing.
4. General arrangement drawing.
5. Detail drawing.
6. Assembly drawing.
7. Erection drawings.
8. Process flow diagram.