What Does Draft Do in SolidWorks?

In SolidWorks, the draft feature plays a crucial role in the design process. It allows designers to add a taper or angle to the vertical walls of a part, which is essential for manufacturing and assembly purposes. By using draft, you can ensure that your parts can be easily removed from molds, facilitate assembly with other components, and improve overall product performance.

Understanding Draft in SolidWorks

The concept of draft is straightforward. It involves creating an angled surface on a part’s vertical walls, commonly referred to as draft faces. By adding draft angles, you provide clearance for the part to be released from a mold or easily assembled with other components.

To add draft to a model in SolidWorks, you need to select the desired faces or features where you want to apply the draft. These faces are typically perpendicular or nearly perpendicular to the mold split line or direction of assembly.

The Benefits of Using Draft

Using draft in your designs offers several advantages:

  • Easier Mold Release: When manufacturing parts using molds, adding draft ensures that the part can be easily ejected without getting stuck. Without sufficient draft angles, parts may become trapped inside molds, resulting in production delays and potential damage to both the part and mold.
  • Improved Assembly: Draft angles also aid in smooth assembly processes.

    They allow parts to slide together more easily during assembly by reducing interference and minimizing friction between mating surfaces.

  • Enhanced Strength: Adding draft angles can improve the structural integrity of parts. The tapering effect redistributes stress more evenly across the surface area rather than concentrating it on specific points.

Drafting Guidelines

When applying draft in SolidWorks, there are a few guidelines to keep in mind:

  • Appropriate Angle: The draft angle should be selected based on the material properties, part geometry, and manufacturing requirements. Commonly used draft angles range from 1° to 5°.
  • Uniformity: Ensure that the draft angle is consistent across all draft faces of a part.

    Inconsistent or varying draft angles can lead to manufacturing issues and compromised functionality.

  • Avoid Undercuts: Undercuts are areas where the draft faces intersect or overlap with other features or surfaces, preventing proper mold release. Identify and eliminate any undercuts before finalizing your design.

Applying Draft in SolidWorks

To apply draft in SolidWorks, follow these steps:

  1. Select the desired faces or features where you want to add draft.
  2. Navigate to the “Draft” feature under the “Features” tab.
  3. Set the desired angle for your draft either by entering a value or using the provided slider.
  4. Select additional options like direction and neutral plane if required.
  5. Click “OK” to apply the drafted feature to your part.

Remember to review your design after applying draft angles to ensure that they meet your requirements and align with manufacturing specifications.

In Conclusion

The draft feature in SolidWorks is an essential tool for creating designs that can be easily manufactured and assembled. By adding appropriate angles to vertical walls, you improve mold release, assembly processes, and overall product performance. Understanding how to apply draft and following the drafting guidelines will help you create high-quality designs that meet industry standards.