Guide to the use and selection of blind rivets
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GUIDE TO THE USE AND SELECTION OF BLIND RIVETS ■ STANDARD RIVETS SPECIAL NON-STRUCTURAL RIVETS HIGH PERFORMANCE (STRUCTURAL) RIV

https://far.partcommunity.com FAR in cooperation with CADENAS has published the Electronic Catalogue for its range of blind rivets on the PARTcommunity portal. FAR thus intends to provide engineers and designers with a tool that allows them to quickly and easily select their own fastening systems and quickly download 3D CAD models. In addition to displaying and downloading in the most common cad formats, the FAR e-catalogue allows the product to be configured according to the deformation relative to the application, providing, in terms of visualisation and use of the model, an extremely...

1. WHAT IS A BLIND RIVET. The blind rivet is an immovable mechanical It consists of two entities: Rivet body (joining fastener that allows two or more parts to be joined element) and Nail or Mandrel (element allowing by operating from one side only. deformation) Rivet body MAIN JOINING TECHNIQUES Joining techniques can be classified into demountable and fixed. By fixed or immovable, we mean those unions in which the parts do not require predictable disassembly over time. When choosing the joining technique, one must also take into account whether or not there is access from both sides of...

WHY BLIND RIVETS The rivet is the preferred solution whenever two ■ Permanent fastening materials must be joined permanently, as it allows: ■ Quick installation ■ Presence of filler material ■ Removal and reinstallation possible ■ Removal and reinstallation possible ■ Easy installation Type of Union Features Riveting Access 1 Side Permanent fastening Punch riveting Quick installation Easy installation

2. OPERATING PRINCIPLE. The properly dimensioned rivet is inserted into a hole calibrated according to the diameter of the chosen rivet. A specific tool (riveting tool) clamps and pulls the nail, its head radially deforms the rivet body until it meets the first element of the parts to be joined. At this point, opposing forces cause the joining of the components and the subsequent breaking of the nail at a defined point and load. Rivet insertion Nail traction beginning rivet body deformation Nail breakage and joining of components Rivet installation

3. DIAMETER AND LENGTH DIMENSIONING. Depending on the stresses and loads to which rivet diameter d and rivet body length L the materials to be joined will be subjected and dimensioned according to the grip range, and to the environmental conditions of use, the rivet the type of materials making it up. must be defined in terms of its dimensions: FACTORS FOR RIVET DIMENSIONING GRIP RANGE AND HOLE DIAMETER MECHANICAL STRESSES RIVET MATERIAL 4. CHOICE OF MATERIAL BY MECHANICAL OR PHYSICAL CHARACTERISTICS. The choice of rivet manufacturing material must be made according to certain parameters...

The main mechanical stresses to which blind rivets are subjected are: TRACTION: the direction of the stress coincides with the geometric axis of the workpiece and tends to elongate it. SHEAR: the stress lies in the plane of the section subject to sliding with respect to the immediately adjacent section. In order to determine the resistance of rivets to such stresses, tests are carried out on them with equipment in accordance with the international technical reference standard UNI EN ISO 14589. SM = S + S Tensile strength test Shear strength Tests are carried out with two equally sized...

5. SURFACE TREATMENTS Protection against corrosion, especially in a fastening system, becomes one of the most important features to be considered when designing a joint in particularly aggressive environments. The choice of the surface treatment must be carried out depending on the material of the rivet, the environment in which it is used and the aesthetics required.. EXECUTABLE SURFACE TREATMENT Anodising: possible on all aluminium alloy rivet bodies with the exception of those for sealed rivets due to the special production method. Epoxy coating. White or Black Zinc plating: white...

6. FAR RIVET CATEGORIES STANDARD RIVETS Standard rivets are the most common rivets used on metal materials. They are available in different types, materials and head and nail shapes. SPECIAL NON-STRUCTURAL RIVETS These are rivets with geometric and mechanical characteristics used in the fastening of materials with particular characteristics or for particular applications. The following rivets belong to this category: ■ ■ ■ ■ ■ GROOVED RIVETS SEALED RIVETS GRAF (peel) RIVETS MULTIFAR RIVETS PLUS INOX RIVETS HIGH PERFORMANCE (STRUCTURAL) RIVETS These products are designed for joints where...

STANDARD RIVETS Standard rivets are the most common rivets used on metal materials. They are available in different types, material types and head and nail shapes. Rivet body Nail head Rivet body Head Characteristics of the Nail or Mandrel Z A3 Normal Head The standard head is round with no special features Oval Retained Head Used to ensure that it is retained after fixing. Particularly suitable when one wants to be sure that the sheared nail remains inside the rivet body. Generally used in closed or difficult-to-access joints where the nail coming out could cause annoying noises or...

Rivet body Features Normal Head (Rounded) Large head It is used to increase the contact surface of the rivet head with the surface of the materials to be joined to ensure a better coupling. Countersunk head This head housed in a 120° countersunk seat with a depth equal to the thickness of the rivet head allows fastening without any raised parts. Zinc Plated Steel Material Stainless Steel (A2 - A4) Stainless Steel Alloy (Ni - Cu)

SEALED RIVETS Commonly known as a ‘sealed’ rivet, this rivet is referred to as a ‘closed end’ rivet. The use of the sealed rivet is recommended in cases where the passage of liquids through the shims to be joined is to be avoided. It is understandable that given the particular characteristic of the rivet, the precision of the hole and the surface finish is of the utmost importance, and where this is not possible, the insertion of an underhead gasket is recomme