Thursday, June 18, 2020

Engineering Drawing | Angle of Projection | QSQTECH.COM

ENGINEERING DRAWING 

Hello friends,

Today, We'll discuss on Industrial Engineering Drawing. Hopefully, you'll understand this topic.

First of all, thanks for visiting.
Now, below topics that are covering today. 
  • INTRODUCTION 
  • ANGLE OF PROJECTION 
  • CUT SECTIONS
  • TITLE BLOCK. 

INTRODUCTION: 

Industrial Engineering Drawing is an art that visually communicates how the construction of any function or product will be made.
In the organization, drawing of that product has an important role in making any product. Developing a new product, requires the design and drawing of the product. It shows how our product will be designed and it also reveals each of the product's dimensions.
To make the picture easy to read, a table of symbol's information is displayed, a title block showing the part number, details of the part, information about the first angle and third angle and ECN revision number also displayed in Industrial Engineering Drawing. 
Its purpose is to accurately and reliably demonstrate the geometric features of the product.

ANGLE OF PROJECTION:

First angle and Third angle projection are part of the orthographic projection system. Orthographic projection system is used to represent a 3D object in a 2D plane. 
Symbol of First Angle & Third Angle Projection.

In this system, two types of projection are used to make the drawing. 
  • First angle projection
  • Third angle projection.
The variation of the First angle and Third angle projection is shown through a clear symbol.

First Angle Projection: 

First Angle Projection is commonly used in European countries.
First Angle Projection.

 In First Angle Projection, 
  • The object is imagined 1st quadrant. 
  • The object is placed in front of vertical plane and top of horizontal plane.
  • The object is lies between observer and vertical plane.
  • To draw the front view and top view, the front view and top view are projected on the vertical plane and horizontal plane, respectively. 
  • According to the law of projection, the horizontal plane is rotated in clockwise direction. When rotating the horizontal surface, this rotation brings the top view below the front view.

Third Angle Projection: 

Third Angle Projection is used in Asian countries and is widely used in the United States.
Third Angle Projection.


In Third Angle Projection, 
  • The object is imagined in 3rd quadrant. 
  • The object is placed in bottom of horizontal plane and behind the vertical plane.
  • To draw the front view and top view of object, the top view and front view are projected on the horizontal plane and vertical plane, respectively. 
  • According to the law of projection, the horizontal plane is rotated in clockwise direction. When rotating the horizontal surface, this rotation brings the top view above the front view.

CUT SECTIONS:

In this, the cut section (A-A, B-B, C-C etc) as shown in drawing cuts the cutting sections. Dimensions are checked in such a way that all dimensions of the parts must conform to our given drawing. 
Cut sections.

If dimensions of part are not correct, the part is rejected. To check the part, the part is cut from all the cut sections as shown in drawing.

TITLE BLOCK:

It is given at the bottom right corner of the drawing sheet. Title is not visible due to security reason. This is only for training purpose.

It shows the details of parts number, parts name, ECN number or ECN revision number, projection detail (first angle & third angle projection symbol), name of drawing maker, date etc.





No comments:

ISO | ISO 9000 series | QSQTECH.COM

  ISO Hello guys,  Today, We'll discuss on ISO (International Organization for Standardization).  Lets start discussion on this topic. H...