Torque of the rivet nut

Expansion rivet nut (also known as expansion nut or compression rivet nut) is a type of fastener used for thin plate connections, typically used in the assembly of materials such as metal sheets and plastics. Its characteristic is that it does not require operation on the back of the board, and can be fixed on the board through a simple pressing or expansion process, forming a firm internal thread. The torque of the rivet nut refers to the rotational torque required to achieve the predetermined tightening degree after the bolt is screwed into the nut.

The torque of the rivet nut is affected by various factors, including but not limited to:

Material: The hardness and friction coefficient of nuts vary depending on the material used (such as steel, stainless steel, nylon, etc.), resulting in differences in the required torque.

Size: The size of the nut (such as thread diameter, pitch, etc.) directly affects the magnitude of the torque. Normally, the larger the thread diameter, the greater the required torque.

Surface treatment: Different surface treatment methods (such as galvanizing, nickel plating, etc.) may affect the friction coefficient of the nut, thereby affecting the required torque.

Thickness of the board: The thickness of the board determines the embedding depth of the rivet nut, which also affects the magnitude of the torque.

Installation method: The installation method of the rivet nut (such as press in or riveting) can also affect the torque value. The press in installation method usually requires greater torque than the riveting installation method.

Fastener fit: The degree of fit between bolts and nuts (such as compatibility, tolerance, etc.) can also affect torque. A tight or loose fit can affect the magnitude of torque.

The Importance of Torque

The correct setting of torque is crucial for ensuring the reliability of the connection. Excessive torque may cause thread damage and even damage to the sheet metal; If the torque is too small, it may lead to insufficient connection, affecting the safety and service life of the product.

Measurement and Calculation

To ensure that the torque of the rivet nut meets the design requirements, it is usually necessary to use professional tools such as torque wrenches for measurement. In practical applications, manufacturers usually provide corresponding technical manuals or data sheets, listing the torque range. For specific application scenarios, it may be necessary to determine the appropriate torque value through experimentation.

summary

The torque of the rivet nut is a technical parameter that needs to be determined according to the specific application situation. In the design and use process, the influence of various factors mentioned above should be fully considered, and the appropriate torque value should be determined through experiments or consulting data provided by the manufacturer to ensure the reliability and safety of the connection.