Two layers of sheet metal are inserted in the tooling.
The punch descends, clamping to the two layers of sheet metal between the punch and die.
The punch advances and draws both layers of sheet metal down into the die.
The punch squeezes the joint, forcing the top layer of sheet metal for flow into the bottom layer, forming the joint.
The punch retracts completely and the two layers of sheet metal are removed from the clinching machine.
What are the advantages of clinching?
Green technology; no welding fumes
No heat affected zone
Low training requirements
Easily join un-weldable or dissimilar material
Easily join pre-coated material
Portable and easily customized
High cycle speeds
Easily inspected via go/no-go gauging
Self-piercing rivets and clinching are non-thermal processes, meaning they do not generate heat during assembly. This eliminates the risk of warping or distortion in materials, making them ideal for joining material that is less than 0.25" (6.3mm) thick or sensitive metals.
Additionally, these methods are faster, requiring significantly less setup time than welding, which can boost production efficiency. Self-piercing rivets and clinching create joints without the need for consumable materials like welding wire or filler metals, resulting in cost savings. They also produce cleaner, more aesthetically pleasing seams, making them ideal for visible or finished surfaces.
It's important to note that welding still has its place in manufacturing. In scenarios where extremely high strength is required, or in applications involving thicker materials, welding may be the superior choice. Moreover, welding offers greater flexibility with a wider range of materials, and it's often the preferred method for critical structural components.
If you're not sure if your part can and should be clinched or riveted, reach out to our team or consider using our sample evaluation process.
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