MIL-HDBK-660B
FIGURE 8. Types of mandrels.
FIGURE 9. Undersize plug mandrel setting.
4.4.1.2.2 Formed mandrel. The end of the formed mandrel is shaped to coincide with the bend considerably beyond the point of tangency. More internal support is realized with the formed mandrel. Sharper bends with thinner wall guide can be made with the formed mandrel than with the plain mandrel.
4.4.1.2.3 Ball mandrel. The single ball type mandrel has a ball tip moving in a flexible socket. The ball tip can be swung on the solid body. This movement enables it to be inserted beyond the point of tangency permitting a full radius swing as the guide is drawn into the bend. The guide inside dimension receives full support from the ball. In addition to being able to make tight radii bends on a thin walled-guide, the ball mandrel performs a sizing action. A multiple-ball type mandrel extends further into the bend than the single-ball type. The greater number of balls required increases the possibility of the walls collapsing.
4.4.1.2.4 Cable mandrel. The cable type mandrel is very useful in making compound bends requiring deep mandrel support. Compound bends do not permit straight clamping between bends because the adjacent bends may have their points of tangency too near each other.
12
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business