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Dimensioning and geometric tolerance have been around for a long time. Until recently, 2D drawings were required to provide tolerance and dimensional data to purchasing, manufacturing, and quality control. As more companies integrate their 3D CAD data into their manufacturing and other downstream processes, the need for digital procedures and standards increases. The American Society of Mechanical Engineers (ASME) released the ANSI/ASME Y14-41-2003 standard to address three industrial practices:
  • 3D models only
  • 3D models and drawings
  • drawings only

For the purposes of this article, we'll discuss the first two.

SolidWorks' part and assembly models support 3D annotations and conform the ASME standard. They can be organized using all of your standard orthographic views, and they replicate the standard drawing view orientations. 3D annotations are easy to create and manage and can be an integral part of your purchasing, manufacturing, and inspection processes.

Why Use 3D Annotations?
In addition to common ways to define design intent, 3D annotations allow engineers to insert critical information directly into the SolidWorks model. They can reduce or even eliminate the need for 2D drawings. Even if drawings are eventually required, adding this information to the model helps speed up the drawing process.

figure
3D annotations.

Getting Started
Every SolidWorks model contains a default annotation view called Unassigned Items. This view contains any annotations that aren't inserted into specific annotation views.

figure
Default annotation view.

You can manually and automatically add new annotation views to your model. To add the views automatically, right-click on the Annotations folder in the feature manager and select Automatically Place into Annotation Views. Each time you insert an annotation, it's added to one of the existing views or a new view is created.

figure
Automatically create annotation views.

Insert Annotation Views Automatically
The first feature you create in a new model results in at least one new annotation view being created -- more than likely there will be two. Creating and extruding the first feature in this model automatically created the front and top annotation views.

figure
The front and top annotation views.

To add additional annotations, select a tool from the Annotation toolbar. Select a face and place the annotation (such as a datum features or surface finish symbols). The annotations are added to the appropriate annotation view.

figure
Add annotations.


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