There are many different processing methods for titanium pipe fittings, many of which fall under the category of mechanical processing. The most commonly used methods are stamping, forging, roller processing, rolling, bulging, stretching, bending, and a combination of these. Pipe fitting processing is an organic combination of machining and metal pressure working.
The following examples illustrate:
Forging: A swaging machine is used to press and stretch the end or portion of a pipe to reduce the outer diameter. Common swaging machines include rotary, connecting rod, and roller types.
Stamping: A taper-shaped core is used on a punch press to expand the pipe end to the desired size and shape.
Roller processing: A core is placed inside the pipe, and rollers are used to press the outer circumference for rounding.
Rolling: A mandrel is generally not used and is suitable for rounding the inside edges of thick-walled pipes.
Bending methods: There are three commonly used methods: stretching, stamping, and the more familiar roller method. This method uses three to four rollers: two fixed and one adjustable. By adjusting the distance between the fixed rollers, the finished pipe is curved. This method is widely used, and the curvature can be increased when producing spiral pipes.
Bulging methods: One method involves placing rubber inside the pipe and compressing it with a punch to create a convex shape. Another method involves hydraulic bulging, where liquid is filled into the center of the pipe. The liquid pressure inflates the pipe into the desired shape. This method is commonly used in the production of corrugated pipes.
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