Henrob Limited

Roger Stanton Doo

Wojciech Gostylla

Neal Sean Williams

Russell John Trinick

Stuart Edmond Blacket

Christopher James Clarke

Stuart Edmund Blacket

Margaret Lucas

A fastening method comprising using a control apparatus to select a first upsetting volume of an upsetting die, using a punch to push a first fastener into a workpiece and using the upsetting die to upset the first fastener, then using the control apparatus to select a second upsetting volume of the upsetting die, using the punch to push a second fastener into a workpiece and using the upsetting die to upset the second fastener, or using the punch and the upsetting die to form a clinch joint.

Fastening method and apparatus

A joint is produced in at least two overlapping workpieces using a joining tool including a punch reciprocally disposed in a cylinder. The workpieces are disposed between the tool and a die. The tool applies a compressive force to deform the workpieces into a joint at a joining area between the tool and die. Continuous ultrasonic energy is applied to at least one of the workpieces in the joining area for at least part of the time during production of the joint to increase the ductility of at least one of the workpieces in the joining area. This induces an acousto-plastic effect in the material being formed which temporarily reduces its strength so as to exhibit increased ductility. The joining method may be used in self-piercing riveting and clinching techniques and enables viable joints to be formed in high strength materials or thick sheets of material.

Joining apparatus and method

A method of riveting comprising using a punch to push a rivet through a workpiece such that a shank of the rivet is received in a die defined by a die body which is in contact with the workpiece, a slug of material being removed from the workpiece by the rivet and being received in the die, the method further comprising closing or substantially closing the die using a rod and using the rod to upset the shank of the rivet.

Riveting method and apparatus

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Flintshire, United Kingdom

Roger Stanton Doo