Typically this is a size increase or decrease on round tubing, however other shapes are possible as well. Simple tools are C style tooling. These Tools form metal tubes from the outside (decrease, size down) or from the inside (increase, size up). The limitation with these tools is only one function inside or outside is able to occur at a time.
C tooling is a type of segmented Tooling that can be used for both expansion and reduction. C Tooling is:
Inside and outside tools are built together. This type of end formed tooling supports material forming from both sides to deliver tighter roundness tolerances for joining or welding after I/O sizing. Specialty I/O tools can be made for oval, square and other shapes. Slight edge flaring and turn downs are possible as well normal ball shapes with locating rings and dimples.
For large expansions or reductions of up to 30% depending on material formability. Ram forming tooling is usually used for changing shape e. g. standard tooling is round to larger or smaller round, round to oval. round to square, or round to pie shape.
Ram multi-strike tools are used for flaring, beading, large expansions or reductions using multi ram tooling to gradually move the material to prevent stresses that could crack or break material. The Ram Multi strike advantage is that all forming occurs in the same machine, and the tooling indexes automatically providing a robust and repeatable process in one machine instead of several.
Flare tools are used for putting a cone or spherical flare shape in tubing.
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