Self Piercing Rivets
Self piercing rivets can trace their ancestry back to the humble Bifurcated Rivet (http://www.clevedon-fasteners.co.uk/products/bifurcated-rivets) developed by the Bifurcated and Tubular Rivet Company (B&TR). A bifurcated rivet was designed to firmly fix wood together (packing cases being a good example). It works by the rivet being pushed into the two layers of wood, due to is slot angle, when it reaches the second piece, the rivet flares, causing the joint to clinch firmly, much stronger than nails and much quicker than screws.
Someone at B&TR (the argument as to who is lost in the mists of time) thought, what if we could do that with a semi tubular rivet ( http://www.clevedon-fasteners.co.uk/products/semi-tubular-rivets), productivity could be increased remarkably as there would be no reason to pre-drill the holes when fixing together sheet metal. The Self Piercing Rivet (SPR) was born (http://www.clevedon-fasteners.co.uk/products/self-piercing-rivets)
SPR’s can fix multiple layers of sheet, even dissimilar materials without a hole (therefore no danger of water ingress) plated or painted sheets can be riveted together as the SPR setting process creates no heat (unlike conventional spot welding therefore there is no residual spatter) and so SPR riveting is an environmentally friendly process.
The benefits are obvious, no preparatory holes to be drilled, environmentally friendly, dissimilar sheets can be clinched (steel/Alum, Alum/Plastic etc.), no water ingress,
Modern setting equipment means the setting loads for each rivet can be monitored and recorded for quality control purposed
The amount of applications is rising every day, from Automotive to humble Hen House covers (yes Really!!)
If you need any further information, on these or any of our products, please contact me on 0121-378-0619 or e-mail me at firstname.lastname@example.org