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Engine Valves

Manufacture of automotive engine valves can be achieved using both friction welding and electrical upsetting joining and forming techniques.

The joining is usually required to obtain bi-metal engine valves. Both Friction Welding and electrical upsetting are ideal processes for the entire range of standard materials used.

Titanium engine valves are welded using Friction Welding to save precious Titanium material.

Gatwick have been manufacturing Friction Welding Machines and Electrical Upsetters specifically designed and used for engine valve manufacture for the last 44 years.

Our Friction Welding Machines cater for both solid Steel and Titanium engine valves and hollow Sodium Filled Engine Valves. We can offer full automation options to suit your needs.

CNC Friction Welding is highly suitable for all these types of valves particularly Hollow Engine Valves which require special techniques which CNC can provide with very fine control.

  • Applications
  • Products
  • Processes

Typical Example:

 

ENGINE VALVES

Titanium Engine valves also catered for.


FRICTION WELDING MACHINES - FOR PIN TO PIN AND/OR HEAD TO PIN JOINING

NC4000

NC4000 FRICTION WELDER

Welding of up to 10mm diameter steel, Titanium or hollow. Ideal for Engine Valve manufacture Further Information


NC7000

NC7000 FRICTION WELDER

Welding of up to 16mm diameter steel, Titanium and other metals. Further Information


NC10000

NC10000 FRICTION WELDER

Welding of up to 20mm diameter steel and other metals including Titanium. Further Information Further Information


ELECTRICAL UPSETTING - FOR HEAD FORMING AND SHAPING FROM BAR

EU32M

32 kVA Upsetter for up to 14mm Diameter Steel   Further information

EUM 32


electrical upsetting

VALVE HEAD - UPSETTING

A high current is passed into one portion of the material to be upset. Electrical resistance causes the component to heat up. Once this portion of the material reaches plastic state, cold material is pushed into the hot area via hydraulic force.

During open electrical upsetting, the bar material is positioned between the upsetting cylinder and the anvil plate or die. Two-part clamping jaws close around the bar and electrical current flows between the clamping jaws and anvil plate, heating the exposed portion of the component. The hydraulic cylinder exerts a controlled force on the cold end of the bar producing a shaped head. The material is upset to the required shape via the application of heat, pressure, flow and linear travel. In open upsetting techniques the component is then passed to a form tool (press) in the red hot state to finish. Closed techniques produce a finished component direct from the upsetting machine.

The upsetting axis is usually vertical and the stroke is hydraulically powered. The machines incorporate many features that ensure optimum cycle time, excellent repeatability, quick set-up and reliable operation for all types and sizes of valves.

 

VALVE HEAD -FRICTION WELDING

 

FRICTION WELDING PROCESS