Engineering Drawing - Simplified & Amplified

Graphical projection is a protocol, used in technical drawing, by which an image of a 3 Dimensional object is projected onto a 2 Dimensional planar surface without the aid of numerical calculation.

It is used for easy understanding of the drawing and visualizing the object for the persons without technical knowledge. These views reveal the shape of an object, approximately, when an observer, views the object.

Orthographic projection is a way of representing a 3D object in two dimensions. Here the view direction is orthogonal to the projection plane, resulting in each plane of the scene appearing in affine transformation on viewing surface.

Different styles of Orthographic Projection. It is further subdivided into three groups: isometric, dimetric and trimetric projection, depending on the exact angle at which the view deviates from the orthogonal.

Understand concept of sectional view.

A primary reason for creating a section view is the elimination of hidden lines, so that a drawing can be more easily understood or visualized. Sectioned technical illustrations are used to improve clarity and reveal interior features of complicated parts.

Learn different types of section views.

It is a graphical method of obtaining the area of the surfaces of a solid.

There are various types of surface development techniques based on the geometry of solids.

Understand how industry uses the concepts of development of lateral surfaces.

More than merely the drawing of pictures, Engineering Drawing is also a graphical language that communicates ideas and information from one mind to another. Drawing standards help in unambiguous communication and it also aids with internationalization

While engineering drawings are a great way to communicate design intent, it’s imperative for engineers to convey only critical requirements. This ultimately translates into lower product manufacturing cost. Drawing Best Practices helps understand this criticality.

Drawings are interpreted based on knowledge and skill level of end user hence it is extremely important to realize importance of industry specific standardization to minimize communication gaps.

Part drawings are mostly applicable for engineered parts and uniqueness of an engineered part is defined by its fit, form, feature and intended function to perform.

An assembly drawing is a drawing of complete machine or system with all of its components located and identified. The purpose of an assembly drawing is to show how the individual parts fit together.

Vendor drawing will vary based on type of suppliers either providing raw material, semi-finished part or finished part to the original equipment manufacturer.

An electrical or Electronic drawing is a simple visual representation of the physical connections and physical layout of an electrical system or circuit.

An installation drawing provides information for properly positioning and installing items relative to their supporting structure and adjacent items, as applicable.

Schematic diagram is a simplified drawing that uses symbols and lines to convey important information.

A drawing goes through multiple changes while being created or even after it get released to other department. Version and Revision plays a critical role in managing and tracking these changes.

Engineering drawings and associated parts are identified by their specific numbers. The correlation between Drawing Number and Part Number needs to be understood clearly. Any ambiguity has a cost and impact in various ways.

Bill of material is a critical derivative of Engineering drawing and the back bone of manufacturing. It is important to understand how a bill of material is created out of Engineering Drawing.

Based on the Engineering Drawing, Manufacturing department creates various drawings such as raw part drawings, stage drawings, Part holding fixture drawings etc which is used for further realization of physical parts.

New Product Development is critical for any organization to stay competitive. Efficient NPD process helps manufacturers to innovate faster and reduce time to market, which is critical for their success.

New Product Development goes through multiple phases where various information is created and consumed. It is important to understand the input / output of information and the way the are used during these phases.