When plastics, light metals or steel are to be joined together, press-fit elements are often used. Thanks to a new triangular quick connector system, which is characterized by circumferential locking grooves on a triangular shaft, very high pull-out forces can now be generated and fast clamping part fixation can be achieved.
Compared to screw connections, press-fit elements can achieve shorter assembly times, independence from preload forces and force-controlled press-fitting. Compared to injection screws in plastics, shorter cycle times are possible and there is no need to insert metal parts into injection molds.
The Tripress quick connector system from ARNOLD UMFORMTECHNIK GmbH & Co. KG has been used reliably for years for fast joining with press-fit screws, for example in the automotive and electronics industries. Now, with Tripress® Plus, a geometrically enhanced version is available that can achieve higher performance. While Tripress® is a polygonal press-fit system that is uniform from top to bottom, the characteristic feature of Tripress® Plus is a polygonal bolt that has a twist. This is created during the profile rolling of the element, i.e. directly during production.
The shaft geometry patented by ARNOLD UMFORMTECHNIK, i.e. the rotating polygonal cross-section, ensures that the user can transfer significantly higher forces with the Tripress® Plus. Customers can thus achieve downsizing or weight reduction.
The Tripress® Plus quick connector can be inserted fully automatically, semi-automatically or using manual press technologies.
Tripress® Plus has a polygonal cross-section that twists over the shaft. The circumferential locking grooves on the triangular shaft ensure very high pull-out forces on the one hand and quick clamping part fixation on the other.
Suitable for aluminum, copper, plastic and steel applications
The fastener is used for light metals, i.e. aluminum, as well as for copper, plastic assemblies and steel. Areas of application include automotive engineering, especially add-on components and electronics, as well as connections in the field of electromobility. The main focus here is on applications in which no rotating elements are to be used, such as circuit board fastenings.
There are a number of arguments in favor of using the Tripress® Plus, for example the lightweight construction due to less connection weight, the smaller installation space and, of course, the significantly shorter cycle time. The setting time is significantly shorter compared to a screw. There is also no dependency between speed and pitch, as Tripress® Plus is pressed in purely axially. This results in significant time savings.
Applications without a clamping part are also possible, as the reliable holding force of the Tripress® Plus is independent of the preload force. The quick connector is tamper-proof, as non-destructive loosening is not possible. And thanks to high holding forces with small press-in depths and a flat head, the fastener is also suitable for small installation spaces.
According to ARNOLD UMFORMTECHNIK, inquiries about press-fit screws have increased. There is demand for suitable connection solutions for ductile light metals, i.e. aluminum and copper. The focus is mostly on assemblies such as control units, charging modules and components for power electronics.
