Apparatus for bending a heat-exchanger tube
AssigneeRetermia Oy
InventorRisto Castren
Life of this patent
Estimating the term…
Abstract
A method and apparatus for bending a heat-exchanger tube, which heat-exchanger tube have heat-exchanger ribs preferably having a needle construction. In the method and apparatus, the heat-exchanger tubes are placed one above the other to be defined by one another to form a battery. The battery of heat-exchanger tubes is fed first into a first bending-device portion of the bending device in which the heat-exchanger tube is bent in one direction. After this, the tube battery is fed further, and the bending is performed in the second bending-device portion in the opposite direction of bending, whereby a wave-shaped form is obtained.
Claims21
A bending apparatus for bending a plurality of heat-exchanger tubes, comprising
- first and second bending means for bending the tubes, said first and second bending means being arranged in opposed relationship to one another to define a passage therebetween through which the tubes are passed in a first direction,
- each of said first and second bending means comprising
- a pivot shaft having a geometric axis oriented in a second direction perpendicular to the first direction,
- a bending blade coupled to said pivot shaft,
- first actuating means for pivoting said pivot shaft around its geometric axis to thereby move said bending blade into engagement with the tubes to bend the tubes, and
- second actuating means for displacing said pivot shaft in the second direction.
A bending apparatus for bending a plurality of heat-exchanger tubes, comprising
- first and second bending means for bending the tubes, said first and second bending means being arranged in opposed relationship to one another to define a passage therebetween through which the tubes are passed,
- each of said first and second bending means comprising
- a pivot shaft,
- a bending blade coupled to said pivot shaft,
- first actuating means for moving said bending blade into engagement with the tubes to bend the tubes,
- bending back stops against which said bending blade bends the tubes upon movement of said bending blade by said first actuating means, and
- locking means for locking the tubes in a precise position relative to said bending back stops.
A bending apparatus for bending a plurality of heat-exchanger tubes, comprising
- first and second bending means for bending the tubes, said first and second bending means being arranged in opposed relationship to one another to define a passage therebetween through which the tubes are passed, each of said first and second bending means comprising a pivot shaft, a bending blade coupled to said pivot shaft, and first actuating means for moving said bending blade into engagement with the tubes to bend the tubes, and
- a feeder device comprising a base frame, a pivot frame mounted pivotally on said base frame, said pivot frame being movable to a vertical position, and a separate support wall movable into a vertical position, the tubes being stacked in a magazine space of said pivot frame and being displaceable in said space forward toward said first and second bending means.
Dependencies are inferred from the claim text.