Abstract: A header machine for drilling specified hole patterns in pipe and for cutting the pipe to a specified length to form headers for use in heat transfer products. The header machine includes hold clamps for selectively holding the pipe during the processing of the pipe and feed clamps for selectively holding the pipe during the feeding thereof through the header machine. The feed clamps are mounted on a feed carriage which is movably mounted for movement forwardly and rearwardly. The feed carriage is driven by a stepper motor operably coupled to the feed carriage for moving the feed carriage and the pipe endwise to various drilling positions. The header machine also includes a spud drill for drilling spud holes in the pipe, a connection drill for drilling connection holes in the pipe, a circular saw for cutting the pipe to a specified length, and provisions for making double circuit patterns of the spud hole.

Abstract: A mechanical expander for tubing for heat transfer products. The tubing expander includes one or more elongated rods, each having an enlargement on the forward end thereof for insertion into tubing to be expanded. The rods are supported on a carriage which in turn is slidably mount on a frame. The carriage is driven forwardly and rearwardly along the frame by a hydraulic motor operably coupled to the carriage by a continuous chain. Elongated tubes which are respectively fixedly attached to a cross member and which respectively partially surround the rods limit lateral or bowing movements of the rods. There are clamping jaws mounted on the frame for clampingly holding the ends of the tubing to be expanded.