Tanks in the range of 1000 to 20,000 litres are produced from thin steel sheet with a laminated polymer lining
Piercing rivets or self piercing rivets has revolutionised the water tank manufacturing process by slashing cycle times, reducing the number of assembly staff and improving the joint quality and pull up force between the overlapped sheets which have a sealant layer between. Large C frames with 1000mm throat depths are used to apply the rivets to the tank walls.
Silos were first joined with SPR in the early 1990’s. These silos are manufactured in a factory using thin gauge galvanised steel and transported to site. They will typically have a grain capacity of up to 150 tonnes and be up to 5 metres in diameter. The use of SPR allows these very large and cumbersome structures to be manufactured with some levels of automation and much greater efficiency than blind fasteners or welding processes. Sealant is used in all the overlap joints to make the complete structure airtight.
Henrob | Self Pierce Riveting
Henrob is committed to pushing the boundaries of HSPR technology to new levels. Its philosophy - "an innovator not an imitator" - is realised in a corporate culture based on entrepreneurial and creative flair. We are extremely proud of having in our Henrob family the largest and most talented group of people solely dedicated to self-pierce riveting technology.
Henrob’s philosophy is to design reliable, robust solutions for production. This is achieved with the aid of 3D computer-aided design (CAD) software allowing in-depth modeling of tools and product access studies. Finite Element Analysis (FEA) software is used to ensure adequate life expectancy of components. Design data can be exchanged via the web, e-mail or FTP servers, offering rapid turnaround of rivet joint designs and equipment proposals.
Henrob applications engineers add fastening and assembly expertise to your technical team. After a careful review of your joint and installation needs, they will propose a complete fastener and tool specification suited to your application requirements and production environment. They may even suggest product design changes to allow more efficient assembly.
Whether developing a new product or streamlining assembly of an existing one, you can rely on Henrob's experience and innovation in fastening technology. From standard tools to customised systems, from rivet joint design assistance to automated assembly cells, Henrob can find your optimal solution.
Henrob fastening systems have benefited applications in a wide variety of industries around the world. View our case studies to see how we have helped customers cut in-place costs while improving their assemblies and finished products.
Henrob Self-Pierce Riveting (HSPR) is a cold joining process used to fasten two or more sheets of material by driving a rivet through the top sheet(s) and upsetting the rivet, under the influence of a die, into the lower sheet without piercing it.