How are snap-fit joints classified?
What will be an ideal response?
Snap-fit joints generally fall into two categories: cantilever (snap legs) and cylindrical joints. Cantilever designs are commonly used on plastic housings for consumer products and latches for cabinets. Cylindrical snap-fit joints are found on childproof medicine bottles, for example. A cantilever snap-fit joint consists of a protruding beam or leg on one part and a ledge on the mating part. The beam must be flexible enough to deflect or bend as it passes over the ledge during assembly. The design should allow the leg to return nearly to its original shape in the assembled position so that the beam experiences little bending force after it is assembled. Other features of the snap leg include the foot, which engages the ledge, and a fillet, which reduces stresses at the base.
Cylindrical or annular snap joints consist of a part with an external lip and a mating part with an internal lip or groove. Usually the outer part expands or stretches to fit over the inner part, then returns to its original shape after assembly. The diameters of the lip and groove, assembly and disassembly angles, and material properties determine the assembly and disassembly forces.
You might also like to view...
Which of the following do you think made the most important contribution to American national interests: Neutrality Proclamation, Washington's Farewell Address, or Convention of 1800? Justify your answer.
What will be an ideal response?
A round reinforcing bar constructed from cold-rolled steel and 320 mm long is required to support a tensile load of 65 kN. Determine the minimum cross-sectional area if the stress cannot exceed 240 MPa or elongate more than 0.42 mm.
What will be an ideal response?
What are some high school courses that would be helpful for students to take that might prepare them
for a career in small animal care?
What will be an ideal response?Who wrote Reflections on the Revolution in France (1790), a founding work of modern conservative thought?
a. the Marquis de Condorcet b. Olympe de Gouges c. Jacques Louis David d. Edmund Burke