Tuesday 25th June 2024
Durbar Marg, Kathmandu

Riveting machinery consists of equipment that uses rivets to fasten materials together. This type of machine is commonly used in manufacturing, construction and aviation. It can be divided into two types: fixed riveting and movable riveting. For example, pliers, scissors, hinges and automobile beams are examples of movable riveting, while aircraft wings, cylinder heads and other large metal pieces are fixed. Compared to other forms of connecting metals, rivet connections offer high strength and corrosion resistance. They are also highly durable and have good sealing performance. Hence, the use of riveting machines is increasing rapidly in many industries, including electronics, electricity and machinery.

The process of riveting involves inserting fasteners through aligned holes in the parts to be joined, then pressing or hammering them from the insertion side to provide the second retaining head. Riveters and riveting machines come in a wide variety of configurations, from manual hand riveters to multihead automated tools that are electrically, pneumatically (pop riveters and air riveters) or hydraulically actuated.

Choosing the right machine for a specific assembly process requires up-front definition of key assembled joint characteristics, such as assembly cycle time requirements, footprint or space available, cost, plant utilities available and finished part aesthetics. Defining these factors up front ensures that the best possible machine is selected to meet the assembly needs.

The most common form of riveting machines is the rivet gun. This device inserts the rivet through the inserted hole in the part, then the operator pulls a trigger that releases pressurized air to drive the mandrel through the rivet and deform the tail end against the bucking bar at the other side of the joint. This force compresses the tail end and holds the adjoining surfaces together, and the bucking bar prevents the rivet from moving back through the inserted hole.

Some machines, like impact riveters and orbital riveters, work very quickly, achieving each rivet in less than a second. Others, such as self-piercing riveters, are more efficient in terms of energy usage. These machines use dedicated sensors that monitor the setting force and punch movement throughout the riveting process to generate a force-displacement curve, which is then compared with a trained reference curve. If the curve falls within a pre-defined tolerance, the process is allowed to continue; otherwise, it may be flagged for further inspection or halted.

Custom Hot Upset systems are often employed in the automotive industry to join body panels, trim and other components of an automobile together. They can be portable or robot-mounted, and they typically employ multiple heads to increase production efficiency. These systems can also be automated, which helps to minimize human error and increases accuracy. They are also highly flexible and can be customized to suit specific assembly applications. They can be used for metals of different thicknesses, and are suitable for a range of applications, such as joining dissimilar metals. They are able to produce high-quality, repeatable rivets. They are also very affordable, making them an excellent choice for companies that need a reliable and accurate riveting tool.

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