The machines covered by the specification are intended to perform all of the milling operations on wing skins, integral panels, complex forgings, extrusions, etc., of ferrous and/or non-ferrous materials for the Aerospace Industry.
Purpose
This specification provides a standard for the manufacture, performance, inspection and procurement of a series of numerically controlled, wide bed, vertical spindle, milling machines. These machines will have skin or profile milling capability or both. This standard lists minimum requirements and is not to limit design advances. This specification, as written, depicts a traveling gantry machine but does not preclude a traveling table machine.
Classification
These machines shall be of the following types, sizes, classes and number of axes.
Type
I. Two independent spindles
II. Two fixed spindles
III. Three fixed spindles
IV. Four fixed spindles
V. One Gantry
VI. Two Gantries
Note: Customer may specify two spindle carriers, each carrier having multiple spindles.
Size
I. Small, 96″ wide
II. Medium, 120″ wide
III. Large, 144″ wide
IV. Extra large, 168″ wide
Class
I. High speed spindle, non-ferrous
II. Wide range spindle ferrous and non-ferrous
Number of Axes
I. Three axes
II. Four axes
III. Five axes
