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STUDY OVERVIEW

KEY THEMES

STUDY BREAKDOWN

FINAL OUTCOME

While simpler in construction than the previous study, the screwdriver introduced different challenges through its changing profiles and ergonomic handle. Recreating it helped develop my understanding of functional design while building on the engineering drawing and CAD skills introduced in Study 1.

OBJECTIVE

Develop the ability to observe, measure, and recreate a functional engineering product through engineering drawings and CAD modelling. This study introduces revolved geometry and sectional drawing techniques while building upon the observation and drawing skills developed in Study 1.

WHY THIS OBJECT?

Profiles: The changing profiles and revolved geometry introduce more advanced modelling techniques than those used in the previous study, requiring careful observation to recreate the handle accurately.

Ergonomics: The handle has been designed to improve comfort, grip, and control, demonstrating how engineering considers the interaction between a product and its user.

Materials: Different materials are combined to provide strength, durability, and comfort, showing how material selection contributes to product performance.

Components: Individual parts work together as a complete assembly, introducing the relationship between geometry, manufacture, and function within an engineered product.

Symmetry: Maintaining rotational symmetry is essential when measuring, drawing, and modelling the screwdriver to ensure the finished representation accurately reflects the real object.

ENGINEERING CHALLENGE

Although the screwdriver contains fewer components than the previous study, its more complex geometry, changing profiles, and ergonomic forms presented a different engineering challenge. The transparent plastic handle also introduced measurement difficulties because its higher refractive index caused light to bend, making the steel shaft appear larger than it actually was. Accurate modelling therefore required careful observation while maintaining correct proportions and clearly communicating the assembly through engineering drawings and CAD.

REAL OBJECT

The images below show the complete screwdriver, detailed views of key features, and the individual components examined throughout the study.

ENGINEERING IN PRACTICE

Although the screwdriver looks like a simple hand tool, recreating it accurately required more than recording its dimensions. The changing handle profile, different materials, and shaped tip each presented their own challenges. This study improved my understanding of how engineering drawings and CAD models are used to communicate manufactured products clearly.

ENGINEERING DRAWING

After completing the CAD model, I produced a set of engineering drawings to communicate the screwdriver from a range of different views. Building on Study 1, this study also introduced additional drawing conventions to improve the clarity and presentation of the finished drawing package.

Drawing Conventions Demonstrated

CAD MODELS

Unlike the pencil in Study 1, the screwdriver could not be fully dismantled without damaging it. The CAD model was developed from external measurements and careful observation, allowing the individual parts and key geometric features to be recreated accurately. This study strengthened my understanding of how CAD can be used to represent products that cannot be measured directly.

Individual CAD Components

ENGINEERING REFLECTIONS

What Was The Most Difficult Feature To Model?

The Phillips tip was the most difficult feature to model because it required several geometric features to work together accurately. Recreating the shape involved experimenting with different CAD techniques until I achieved the closest match to the original screwdriver.