Original article date: October 1999 There’s much more to torque control than turning up with an impact wrench, as Alan Quinn found out from MHH Engineering When a bolt is tensioned correctly, it is working at optimum efficiency and will resist coming undone. However, if the tension is too low, the nut could vibrate or [...]
Full article...Original article date: September 1997 German company FAG has become the first bearing manufacturer to recommend the use of adhesives for bearing assembly in its own literature. Roller bearings are usually secured into a housing or onto a shaft be means of an interference fit, which is achieved by press-fitting or shrinking the components. The [...]
Full article...Original article date: March 1999 Ultrasonic welding is a versatile process which can be used to join a wide range of thermoplastics. Jerfurth’s BRIAN SMITH explains how to avoid some of the more common pitfalls. The process of ultrasonic welding is not just about joining long sections of rigid thermoplastics- It can be used directly [...]
Full article...This article was originally written in the period 1995-2000 Assembling cylindrical parts with adhesives requires sophisticated bonding technology. Retaining compounds join circumferential assemblies. Design benefits of adhesives Eliminate bulk needed for high friction force Augment or replace press fits Reduce machining costs Combine materials for the best properties of each Eliminate distortion when installing drill [...]
Full article...Original article date: April 1998 A square self-clinching fastener said to cut assembly time of thin aluminium sheets by up to 80% has been unveiled. Faced with the need to attach thin metal sheets too thin to tap, how best to provide permanent load-bearing threads, while reducing the amount of required hardware and time required [...]
Full article...Original article date: April 1999 The critical weakness in many products is the joints. Bolted joints in particular can be a source of concern for the engineer. In spite of the term ‘nuts and bolts’ being used to describe the simplest aspects of a particular topic, bolted joints are far from simple. They are not [...]
Full article...This article was originally written in the period 1995-2000 Paul Brackell of Townsend Coates covers the basics of a technique which is often overlooked – resistance welding can be the answer to joining small parts together The four basic bonds Braze/soldered bond:-resistance heating of the workpieces produces sufficient heat to melt a third metal, such [...]
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