What feature is used to remove sharp edges in a 3D part model for safety?

The feature used to remove sharp edges in a 3D part model for safety is the chamfer. Chamfers are typically applied to edges at an angle, creating a beveled edge that can help eliminate sharpness. This addition is not only a safety measure but also has aesthetic benefits and can improve the practicality of a part by facilitating assembly or reducing stress concentration.

Using a chamfer effectively means that edges are less likely to cause injury during handling or usage, as well as reducing the likelihood of damage to the part during machining or assembly. Furthermore, chamfers can also assist in clarifying the geometry of the part during fabrication processes, such as during welding, by allowing better access to corners.

Other choices such as fillet, smooth, and bevel also alter edges but have different applications or shapes. A fillet adds a rounded edge to a corner, smooth implies a general softening of surfaces without specifying a particular geometrical shape, and bevel is a term that can refer both to the overall technique of cutting edges and in certain contexts, may be interchangeable with chamfer but can have differing applications or definitions in specific modeling situations.