| 摘要 |
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. The rods along with the supports thereof are removably mounted on the carriage, the cross member is removably mounted on the frame, and the clamping jaws are removably mounted on the frame, so that the number of the rods, supports, elongated tubes, and clamping jaws may be changed to accommodate the number and center line spacing of the tubes in the coils to be expanded. A programmable logic controller controls the motion of the carriage during the operation of the expander.
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