Upcoming SlideShare
×

# Technical Drawing

41,105 views

Published on

An introduction to the styles and importance of technical drawing

26 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• what is the meaning of isometric box?

Are you sure you want to  Yes  No
• Thanks

Are you sure you want to  Yes  No
• thanks

Are you sure you want to  Yes  No
• t
hanks

Are you sure you want to  Yes  No
Views
Total views
41,105
On SlideShare
0
From Embeds
0
Number of Embeds
1,613
Actions
Shares
0
1,153
4
Likes
26
Embeds 0
No embeds

No notes for slide

### Technical Drawing

1. 1. technical drawing
2. 2. introduction <ul><li>Technical drawings: </li></ul><ul><ul><li>Clearly define aspects of engineered items </li></ul></ul><ul><ul><li>Conform to standards </li></ul></ul><ul><ul><li>Minimize confusion </li></ul></ul>1.8ish Build this!
3. 3. obstacles between the real world and your drawing <ul><li>We live in a 3-dimensional world. </li></ul><ul><li>Paper constrains us to 2 dimensions. </li></ul><ul><li>You cannot easily measure a drawing. </li></ul>
4. 4. solutions <ul><li>3-dimensional objects can be represented in a 2D space by two primary methods: </li></ul><ul><ul><li>Orthographic Projection </li></ul></ul><ul><ul><li>Isometric Projection </li></ul></ul>
5. 5. orthographic projection <ul><li>Orthographic projection uses multiple views of the subject, from points of view rotated about the subject's center through increments of 90°. </li></ul>
6. 6. isometric projection <ul><li>Isometric projection captures the object from an upward angle and disregards perspective </li></ul><ul><li>This can cause some confusing issues </li></ul>
7. 7. dimensioning <ul><li>Dimensions in cooperation with a drawing should provide sufficient information to allow anyone to machine the object. </li></ul><ul><li>With complex objects involving many dimensions, dimensioning can get messy. </li></ul>
8. 8. dimensioning types <ul><li>Parallel dimensioning: </li></ul><ul><ul><li>Parallel dimensioning consists of several dimensions originating from one projection line. </li></ul></ul>
9. 9. dimensioning types <ul><li>Superimposed Running Dimensions </li></ul><ul><li>The common origin for the dimension lines is indicated by a small circle at the intersection of the first dimension and the projection line. </li></ul>
10. 10. dimensioning types <ul><li>Chain Dimensioning </li></ul><ul><li>Chains of dimension should only be used if the function of the object won't be affected by the accumulation of the tolerances. </li></ul>
11. 11. dimensioning types <ul><li>Dimensioning by Co-ordinates </li></ul><ul><li>Two sets of superimposed running dimensions running at right angles can be used with any features which need their centre points defined, such as holes. </li></ul>
12. 12. line styles <ul><li>visible lines - are continuous lines used to depict edges directly visible from a particular angle. </li></ul><ul><li>hidden lines - are short-dashed lines that may be used to represent edges that are not directly visible. </li></ul><ul><li>center lines - are alternately long- and short-dashed lines that may be used to represent the axes of circular features. </li></ul>
13. 13. why? <ul><li>If you want your idea or mechanism to be seriously considered, submit technical drawing demonstrating the functionality and form. </li></ul>