The Friction Weldin

The Friction Weldin

Plan:

1. introduction (введение)

2. distinguishing feature (отличительная черта)

3. Advantages of Friction Welding (преимущества )

4. application (применение)

5. derivation (выводы)

1.Traditionally, friction welding is carried out by moving one component relative to the other along a common interface, while applying a compressive force across the joint. The friction heating generated at the interface softens both components, and when they become plasticised the interface material is extruded out of the edges of the joint so that clean material from each component is left along the original interface. The relative motion is then stopped, and a higher final compressive force may be applied before the joint is allowed to cool. The key to friction welding is that no molten material is generated, the weld being formed in the solid state.

2.

• Minimal workpiece surface billet (минимальная подготовка поверхности заготовок)

• Small time of welding (several seconds)

• High durability of a welded joint (высокая прочность сварного шва)

• Process is clean, free from spatter(spitting) ( нет разбрызгивания)

• Can weld dissimilar metals ( сварка несхожих металлов)

3. Friction welding's benefit sextend beyond joining dissimilar materials in that the process is environmentally friendly, producing little smoke or slag and requiring no flux, gases, or filler material. Friction welding is also energy-efficient, using between 25 to 100 watts per square centimeter of weld area under normal operating conditions.

The fact that friction welding is a simple, machine-controllable process helps

4.

Rotary friction welding, in which one component is rotated against the other, is the most commonly used of the processes, and many carbon steel vehicle axles and sub-axles are assembled in this way. The process is also used to fabricate suspension rods, steering columns, gear box forks and driveshafts, as well as engine valves, in which the ability to join dissimilar

Also in motor industry

5.

The given technology can be applied for a producing of the bimetallic tools of red-hard steel and doped red-hard steels (drill, taps, reamers, milling cutters, drill picks).

In the new millennium there is no doubt that the automotive sector will find an increasing number of uses for this process as its cost-effectiveness and ability to weld dissimilar material combinations with minimal distortion is more widely appreciated.