DOOPSTIC EXTRUSION MACHINE

DOOPSTIC EXTRUSION MACHINE

PREFACE:

In earlier times, there were cutting materials like cutting by hand, with tools made from bone, stick or stone. These were adopted during the years over two and half million years ago. The materials can only used for cutting clothes, cooking utensils, shelters and weapons.
Later, elementary materials such as bronze and iron were employed as cutting materials. These were introduced in 17th century, and used only for softer materials.
Later on, progress had been taken on the development or technical advancement on the cutting materials like steel, etc. during 18th century.
Later on machines like lathes, milling machines, etc. were introduced with many of great features. The introduction of such machines in the field made easier to those which could not be performed machining like cutting, drilling, turning, etc. by using the cutting materials used during earlier periods.
Steels having more additional properties like strength, toughness, temperature resistance, etc. were introduced as cutting materials. These materials include carbide steels, high carbon steels, etc.
These became the convenient and conventional methods of machining which are used even at present.
Generally, in conventional methods of machining like drilling, milling, lathe turning, etc. mechanical cutting action that arises when a sharp tool makes contact with the softer material. The machining processes using these principles are laid on the manufacturing process for almost two centuries.
In recent years, however attention has turned towards the application of non-conventional methods of material due to the development of harder materials.
# Beams of electrons and gaseous ions.
# Electrolytic dissolution
# Light in the form of LASER beam
# Spark generated by the breakdown of a liquid dielectric when a voltage is applied between
two electrodes
# Plasma of ionized gas
# Erosive effects of granular particles undergoing ultrasonic vibration.
# High pressure water jet
# High pressure abrasive jet
These are used as the cutting material for their respective machines.


for more info visit.
http://www.enjineer.com/forum