When dimensioning a weld, instructions are given to the manufacturer of how the preparation should be done for the specific weld area. The weld detail on the drawing should convey all the information necessary for this preparation. Some companies does not require weld details and only require weld symbols for the identification of welds, where …
I have seen on a few forums that some people ask: “Is placing weld symbols on isometric views allowed?” and the answer is YES … only if the position of the weld is clear and there can be no other interpretation of how the weld should be done. When placing weld symbols on isometric views, …
Placing weld symbols on Isometric view (with examples) Read More »
What are tolerances? Tolerances refer to the amount a dimension my vary from it’s maximum to its minimum value. Tolerances can be indicated as a unilateral tolerance or a bilateral tolerance. Unilateral Tolerance The Unilateral Tolerance (as shown) indicates the base dimension and how much the actual manufactured dimension may vary from this dimension. As …
How are tolerances shown on an Engineering Drawing? Read More »
Free hand sketching in engineering graphics are a very critical part of any engineering project. It may be used at any stage of a project’s life cycle, whether it is the planning, execution or even end phase of the project, it is a way to convey critical information regarding certain aspects of the project. What …
When representing assemblies or parts, it is often necessary to draw the assemblies or parts larger or smaller. Usually smaller details are drawn larger to enable a draftsman to include dimensions and notes and larger assemblies are drawn in a smaller scale to show the “bigger picture”. First , we need to establish what a …
Did you know, Views are the building blocks of engineering drawings. Without different views, engineering drawings cannot exist, so understanding how views are used on drawings is a critical. Different views: Base views Projected views Sectional views Auxiliary views Partial views Interrupted views Before kicking off with the different views, it is worth a mention …
Different types of Views on Engineering Drawings Read More »
Sometimes it is necessary to cut a part or assembly to reveal geometry or fits on the inside of a part or assembly. A Section or cross section is a view generated from a part or assembly on a cutting plane or multiple cutting planes that reveals the outlines on the inside or assembly fits. …
Sections and Section views on Engineering Drawings Read More »
Certain features on a Engineering Drawing requires specific ways of indication. For example, holes require center lines to identify the center and show that it is round. Hidden detail are shown with a certain line type to avoid confusion with visible edges. Most CAD Software packages will have these different line types predefined as layers. …
Different line types used on Engineering Drawings Read More »
Learning Engineering drawings may seem like a daunting task, but in actual fact most Engineering drawings comply to very much the same principles. Before diving in and starting to create Engineering drawings, some foundational principles needs to be understood. Engineering Drawings are often referred to as Mechanical-, Technical- or manufacturing drawings. A good rule to …
When reading a Engineering drawing, one needs to communicate how the different views was taken from a three dimensional (3D) object. I have found a easy way to show students how projection is done and never make them forget it again! There are two different types of projection methods in Engineering drawings, namely First Angled …
The difference between first angle and third angle projection systems Read More »