The author of this "story", based on numerous professional publications in relevant world journals presents extensive research into the theory and practice of the behavior of threaded joinings during assembly and operation.
Answering question in the title requires seriously means thoroughly knowing the behavior of bolted joints during assembly and in operation. Does a bolted joint represent a steady state after successful tightening, indicating the exact value of the required assembly force, a fixed status quo? If not, what is actually going on there? Not only the...
Flanged pipeline joints are one of the most commonly used joint connections between pipes and components. They have their own specifics compared to other types of bolted joints. The most important parameter is the tightness, determined by the correct tightening of the screws and corrosion resistance.The main costs of any piping system are the costs...
Loosened nuts and bolts during operation have been a problem since their invention. Wedge Locking Washers are currently considered in professional circles to be one of the most reliable locking system for bolted joints. In this sense, they are presented not only by manufacturers, but also by distributors. They gained their popularity mainly after...
According to DIN 8593 "Manufacturing Process Joining", screwing is the most widely used method of joining in the mechanical engineering and in the automotive industry. This is also the reason why the reference from Leonardo da Vinci is current in the technique of mechanical joining of parts using threaded fasteners. Leonardo's compass and rudder in...
The bolted joints are exposed to various mechanical, chemical or most combined attacks when using. Under certain adverse conditions it can cause crash structures often with tragic consequences. The submitted article tries to answer how and why it happens.
Napriek tomu, že správne dimenzovaný, exaktne utiahnutý, podložiek prostý skrutkový spoj nepotrebuje žiadne externé istenie skúsenosti ukazujú, že existujú prípady, kedy je nutné venovať návrhu konštrukčných uzlov so skrutkovými spojmi zvláštnu pozornosť. Platí pravidlo, že neistený skrutkový spoj predstavuje latentné nebezpečenstvo rozpadu...
Bolted joints can loosen when transverse repeated loadings or vibration from internal and external sources are applied to the joints after they are tightened. The loosening process is accompanied by a gradual reduction of bolt tension and in extreme cases can result in the failure of an important joint. There are many cases, loosened bolts and...
Ako je známe, v bežnej strojárskej praxi prevláda nekontrolované uťahovanie skrutkových spojov ručne alebo pomocou nepresných momentových kľúčov. Na príčine nie je iba neochota investovať do kvalitného náradia, ale hlavne utkvelá predstava o dostatočnej kontrole uťahovania podľa citu. Obidva dôvody sú však irelevantné. Veľmi ľahko sa totižto dá...
Táto parafráza známeho výroku z biblie výstižne symbolizuje úlohu skrutkových spojov - spájať. Je to ich priam dejinné poslanie. Veď závit ako nositeľ charakteristických vlastností skrutkových spojov je známy už vyše 2000 rokov a nič nenasvedčuje tomu, že by v budúcnosti mal stratiť na význame. Istý klasik si v tejto súvislosti povzdychol: "Kiežby...
