Milling

see also: Etymology of Milling

The Fraisage is a process of Usinage by removal of matter. It is characterized by the recourse to a Machine-outil: the Milling machine. The tool classically used is the strawberry.

In milling, the removal of matter - in the form of chips - results from combination of two movements: rotation of the cutting tool on the one hand, and advances workpiece on the other hand.

The milling machine is particularly adapted to the machining of prismatic parts and also makes it possible, if the machine is equipped with Numerical control, to carry out any type of complex same forms.

The current milling machines are frequently automated (numerically controlled milling machines and center holes). The Programmation of numerical control of these machines requires the recourse to software interfaces, for a share embarked on the machine itself (Directing of Cde Numérique), and for another share, external with the machine (PC + software package Fabrication computer-assisted 2D and 3D). In industry, the workmen qualified milling machine operators frequently carry out complementary work of turning.

Mode of milling

The principal practiced methods of milling are:

the milling of profile (known as “while rolling” or “of form”);
end milling (known as “of envelope”)
milling combined (in end and of profile)
the Tréflage.

Mode of action of the strawberry

In addition, milling can be carried out:

in opposition: the tangential cutting pressure of the strawberry is opposed in advance of the part to mill (to be implemented on conventional machine in order to neutralize the plays of transmission of movement).
in agreement (known as “while swallowing”): the tangential cutting pressure accompanies the part to be milled in its displacement: it is the method used on the machine with Cde Numérique (not of play to be compensated thanks to the ball screw)

See too

List of tools

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