self piercing

Back  Blog Home

Stuttgart Fastener Fair – Thank you

Back  Blog Home

We would like to thank many of our customers that came to visit us at Stuttgart from all over the world.

It was good seeing you and the many new, potential customers at the Fasteners Fair

We hope you all had a good show and that you returned home safely

We look forward to developing our growing export business with you

Cold Forging Basics

Back  Blog Home

Riveting is one of the oldest forms of fastening.

Solid rivets have been found dating back to the Bronze Age (ended 800BC)

You will have seen rivets hidden in plain site on bridges, ships, Aircraft and Trucks to name a few common applications.

They are also common throughout your home, if you have double glazing then you will probably have our rivets in the hinges.

Rivets are formed by a process called Cold Forging, this process produces no waste as the head of the rivet is formed by upsetting the shank of the rivet. This ensures the grain flow of the material remains in-tact thus strengthening the fastener.

The rivets are inserted in the material to be fixed together and “set” by deforming the end of the shank of the rivet to product a permanent fix.

The more popular, semi-tubular rivet is set in a similar way but require a lot less setting load and provides a “Clinch” fix which pre-stresses the material.

Many engineers are unaware of the advantages or even the function of rivets, tending instead to fall back on threaded fasteners which are more widely available.

The most recent development in Riveting is the self-piercing rivet, where you do not need a hole in order to rivet two materials together. This process is now commonplace in state-of-the-art automotive manufacturing plants. JLR being pre-eminent in this regard.

The process used to produce these fasteners has been developed in order to use the same manufacturing technique, Cold Forging, but to enable finished components to be forged outright, with the same benefits, no waste and a very strong structural integrity.

We are happy to help customers or prospective customers with any queries that may have regarding riveting or cold forging. We have recently helped a number of companies by producing and riveting prototype designs for them.

We have been in this business since 1939, over that time we have provided innovative, low cost solutions to many fastening and cost reduction requirements, thrown at us by our customers.

In the first instance, contact me, Steve Hardeman either by e-mail (sales@clevdonfasteners.co.uk ) or by telephone on +44(0)121-378-0619

New PR-5 battery powered self-piercing rivet setting machine

Back  Blog Home

We are pleased to offer the PR-5 battery powered self-piercing rivet setting machine. We have added this machine to our range specifically to help our sheet metal and HVAC customers. We feel it will also be of interest to vehicle body shop customers as vehicle bodies are increasingly assembled using Self Piercing rivets.

The PR5-5 can also be used to set semi-tubular, full tubular and solid rivets as well as having rivet extraction capabilities

PR-5

Because of our long experience in self-piercing and the fact that to many SME’s it is an unknown quantity, the product is only sold after we have proved its capability to potential customers by riveting the application that they have in mind to their total satisfaction

The rivet specification is key to the joint performance when the rivet is set and so the machine will only be sold only when we have set and tested the rivet joint to the customer’s satisfaction, this also acts as a training platform for those unfamiliar with the technology to ensure its correct operation in the field

It is vitally important that the correct rivet is used to ensure a secure joint. Changes in material thickness will affect the performance of the joint. Any changes of this type should always be discussed with us prior to implementation as a different rivet configuration may be required

As well as the machine and tooling the PR-5 comes complete with two rechargeable 18V batteries together with a 240/110 V charger for continuous operation of the unit

Customers interested in purchasing the PR-5 should send samples of the material they intend to rivet together and any associated drawings (to ensure access for the frame of the machine), we will then

To find out more information please go to:-

https://www.clevtec.com/clevtec-pr5-battery-powered-self-piercing-setting-gun

Where you will find a video of the machine in action

What do you mean,it doesn’t need a hole?

Back  Blog Home

SPR4

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.

SPR2

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 sales@clevtec.com