Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Comparative study of the tensile strength of internal threads versus the use of false threads (helicoil) in aluminum alloy
Submission Author:
Claysson Vimieiro , MG
Co-Authors:
Claysson Vimieiro
Presenter: Claysson Vimieiro
doi://10.26678/ABCM.COBEM2023.COB2023-1647
Abstract
How difficult it is to design a set without using threaded elements. Therefore, the bolt is the most used fastening element for detachable joints and, with technological advances, the use of increasingly resistant materials, provide dimensional reduction. However, only high-sustainability threads achieve high-strength joints. Failures, called Thread Stripping, similar to thread stripping, which occur in materials such as aluminum, arising from the axial force generated by the bolt when exceeding the maximum resistance of the thread threads, are catastrophic. A possible solution would be the application of false threads, commonly known as helicoil. For this article, a 3003 aluminum plate was used, due to the ease of acquisition and because they are more economical materials. Evidently aluminum, when we talk about threads, does not have a very high tensile strength. Composing the studies, we used helicoil that are very resistant to pulling out. The objective was to investigate and compare the tensile strength of threads produced by machining versus thread by insertion. The results showed that when we insert the false threads, the material supports a torque approximately 50% higher, causing fracture by simple traction of the bolt.
Keywords
aluminum alloy, False threads, Internal threads, Helicoil
