Portable Expander
The TSUN Portable Tube Expander is hydraulically powered mechanical expander designed for expansion of heat transfer coils (designed to expand two tubes per cycle). Each portable expander is designed for a specific tube outside diameter and center-to-center dimension and includes the hydraulic unit, drive head and tooling.
Hydraulic unit
Hydraulic unit consists of oil tank, oil filter, oil level indicator, electric motor, hydraulic pump
, controllers and electric box.
In the hydraulic unit, a 3kw 1420RPM electric motor is used as power source. The hydraulic pump coupled
with electric motor can provide up to 16 l/min flow rate and 170bar pressure.
Drive head
The TSUN Portable Expander Drive Head contains two Rod Drive Gear Cartridges
consisting of two gear-drive rollers that mount on top of two set of fixed rollers using
a screw. These two set of four rollers are responsible for driving expander rods through
tubes. The grip pressure of rollers on expanding rod depends on tightness of the screw
while the driving torque transfers through sets of gears from a hydraulic motor.
Tooling
This includes swaging tool, clamp jaw, expander rod, rod stops and hand guard.
Clamp jaw and hand guard are mounted on drive head.
Each Jaw Assembly is precision machined for a specific tube outside diameter
and center-to-center dimension from 1.7225 Steel and heat treated to 40-45 HRC.
The clamping force is adjustable with the clamping pressure provided by a die spring.
This force is overcome by the expander rods when they return to their retracted position
and jaws are open to allow gripping of the tube. Since pre-belling of the tube ends is required
to ensure the proper grip, a swaging tool is provided.
The Rod Stops are used to limit the forward travel of the expander rods during the expansion cycle
by bearing against the hand guard.
| Tube Diameter | 9.52, 12.7, 15.87mm |
| Tube Material | Copper, Aluminum, Other thin-wall materials |
| Tube Per Cycle | 2 |
| Tube Center to Center | 25,38,40,45,50mm |
| Expansion Speed |
