11/21/2023 0 Comments Rivet joint screwThe built-up preload ensures a highly durable structural connection. Also when a spacer is used, there is a regular preload between the connection of the nut, metal sheet, spacer and the additional metal sheet. With a clinch nut or rivet nut, a regular preload builds up between connected metal sheets at the later screw joint. Thus, for applications with high side loads (90-degree angle to the screw axis), we have suitable solutions that are used in series production. Hence, this fastener type handles much higher forces from any load direction. The diameter and height of the clinch nut and rivet nut is significantly larger than the formed bulge of a blind rivet nut. Advantages of clinch nuts & rivet nuts High load capacity If the joint is highly stressed, metal sheet deformation, rivet collar deformation, tear-out of the rivet collar or pulling through the metal sheet may occur. The weakness of the blind rivet nut joint is the formed bulge. Set blind rivet nuts in sheet metal Consequences of high stress With lever loads from the side or axial loads, the blind rivet nut reaches its limits quite fast. The blind rivet bulge has a small diameter and is not very thick. Thus, there is no preload between the metal sheets. Regardless of the tightening torque, the joint only holds on the blind rivet bulge, as the additional metal sheet is screwed against the blind rivet nut head. However, blind rivet nuts with the highest property class do not necessarily meet the expected strength requirements for the subsequent screw joint. In closed profiles with accessibility from one side, the use of blind rivet nuts appears as a common solution. Combination of clinch nut and spacer in useÄisadvantages of a blind rivet nut Strength of the screw joint.There is a wide range of possible applications for the combination of a clinch nut and spacer with additional cost-saving potential in the manufacturing process. This structural connection of a nut, metal sheet and spacer is clearly superior to a blind rivet nut connection. With thicker metal plates, a clinch nut or rivet nut can be combined with a washer / spacer. The spin-pull process enables automated assembly of clinch nuts and rivet nuts in one-sided joining positions, such as closed profiles.
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