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Sheet Metal Fasteners
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Sheet Metal Fasteners What scientific principle defines a fasteners strength? What are the three ways we can connect sheet metal? Why are some methods preferable to others?
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How do fasteners work? Fastener strength is dependent on surface area.
Mechanical fasteners rely on clamping force
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Sheet Metal Fasteners The three ways to fasten sheet metal are:
Mechanical Fasteners Welding Adhesives
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Mechanical Sheet Metal Fasteners
Threaded Fasteners Rivets
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Threaded Fasteners Screws - A headed threaded fastener that is designed to be used by forming its own threads. Bolt - A bolt is the term used for a headed fastener having external threads that meet an exacting, uniform bolt thread specification
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Threaded Fasteners
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Rivets a rivet consists of a smooth cylindrical shaft with a head on one end. The end opposite the head is called the buck-tail. On installation the rivet is placed in a punched or drilled hole, and the tail is upset, or bucked (i.e., deformed), so that it expands to about 1.5 times the original shaft diameter, holding the rivet in place.
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Rivets
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Welding Spot MIG/TIG
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Spot Welding contacting metal surfaces are joined by the heat obtained from resistance to electric current.
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MIG/TIG Welding contacting metal surfaces are joined by the heat obtained from the electric arc.
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Spot Weld With a MIG
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Adhesives Epoxy – Simply put, epoxy is a two part, very high strength, glue. Two parts: Resin Hardener
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Sheet Metal Epoxy Application
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Conclusion How has the Industrial revolution effected fasteners?
What type of fastener or fastening system do you think would be the: Strongest: Fastest to install: Best looking: Most permanent: Easley removed: Require “special tools”:
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