Posted Date: 02/10/2011 AppMo 2.0, which solves the problem of knowing how much clamping force the bolt is exposed to during installation and while “working”! AppMo 2.0 also solves the problem regarding the multiplier effects that arise during installation.When fitting bolts with associated nuts and washers, what is required is the tension force clamping force between the metal sheets. It is therefore not sufficient simply to add an operation if you do not know what this operation will contribute to the clamping force in the joint. The tension force can vary significantly if you do not keep track of all the parameters, such as the added operation.Of the added assembly operation, approx. 50 %, is used to overcome friction between the rotating part’s contact surface. Approx. 40 % is used to overcome friction in the threads between the bolt and the nut. This means that only around 10 % of the added operation achieves the desired tension force. This can be increased using AppMo Solid Lubrication Paste, but only to just over approx. 20%.Applying this knowledge, it is easy to understand that the tension force for the same torque can increase to double using AppMo Solid Lubrication Paste, but with the penalty of having a pause in the assembly.Knowledge of assembly operations and the effect of friction on the tension force is very important in order that the assembly …
Source : American Fastener Journal – Read full article on the given date in the news section via American Fastener Journal.