Week 9:- 2D Detailing Challenge

Q1.What are the Drawing templates?

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The Drawing sheet with standard information and standard format is used for all drawings with minor modifications according to the company requirement.Then the standard sheet is called drawing templates.It consists of quite a lot of information's they are

Company name.

Sheet size.

Scale ratio.

Part name & part number.

Signature or name of the person who drafted drawing.  

Signature or name of the person who checked & approved drawing.

Material name & properties if required.

Drawn date.

Dimension Units.

Q2.What do you understand by 1st& 3rd  Angle of projection?

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To define an object, technical drawings use 2D views. This is called as orthogonal projection. The projection of the plane is viewed by the observer. The quadrants it should be only rotated in a clockwise direction.

The angles of projection are basically the view formats for orthogonal views of assemblies or panels. First and third angle of projection are majorly used in automotive standards. Understanding the angles of projection helps us to derive the actual image of 2D drawing.

The orthographic projection system is used to represent a 3D object in a 2D plane. The orthographic projection system utilizes parallel lines, to project 3D object views onto a 2D plane. According to the rule of orthographic projection. To draw a projection view of a 3D object on a 2D Plane. The horizontal plane is rotated in the clockwise direction.

Q3.What is the First angle & Third angle projection? and why can't we use the 2nd and 4th angle of projection?

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First angle of projection

• Object lies between plane & observer.
• The object is placed at the top of the horizontal plane and the front of the vertical plane.
• The first angle projection is widely used in our country and most of the European countries.
• The plane of projection is always taken as solid in the first angle projection.
• Front view is at the top of the horizontal axis.
• Top view at the bottom of the horizontal axis.
• Right view is at the left side of vertical axis.

Third angle of projection

• Plane lies between Object & observer.
• The object is placed at the bottom of the horizontal plane and behind the vertical planes. 
• Third angle projection majorly opts in the United States.
• The plane of projection is always taken as transparent in the third angle projection.
• Front view at the bottom of the horizontal axis.
• Top view at the top of horizontal axis.
• Right view is at the right side of vertical axis.

why can't we use the 2nd and 4th angle of projection?

In both first & fourth quadrant the horizontal plane overlaps with the vertical plane. So we cant get the top and bottom view.

Q4What is GD&T? What are the benefits of GD&T?

GD&T is an acronym that stands for Geometric Dimensioning and Tolerancing. It is a symbolic language used by designers to communicate manufacturing constraints and tolerances clearly. This information is conveyed in the form of annotations included in the design of the part.

 Benefits of GD&T

GD&T offers the ability to improve quality, decrease cost, and increase speed to market. The GD&T drawing is the continuous thread that connects the design and manufacturing teams and keeps everyone speaking the same language – literally! By engaging the production team during the design, the part functionality can be discussed upfront and the team can jointly develop a manufacturing process that will produce high-precision components - avoiding overly tight tolerances that often drive up cost and result in quality issues during manufacturing. For these reasons, it is crucial for OEMs to partner with an injection molder, such as Crescent Industries, who has Design for Manufacturability (DFM) expertise; this simply means the design and manufacturing teams are integrated to allow manufacturability issues to be identified and addressed during the design process – saving significant time and cost!

• Enhanced Communication.
• Improved Reliability and Quality.
• Increased Flexibility.
• It also controls shape of the part instead size.
• It can provide bonus tolerance Thereby reducing the rejection Rate.

Q5.Explain all the symbols used in GD&T?

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