Long U-shaped tube bender

Abstract

The invention relates to a long U-shaped tube bender, in particular to the long U-shaped tube bender capable of processing two tubes in different pipe diameters. The long U-shaped tube bender comprises a base, a stand, a rounding and straightening device, a feeding device, a cutting device, a feeding path, a bending device, a receiving device and a controller, wherein the rounding and straightening device comprises two sets of rounding and straightening mechanisms; the stand is provided with a position switching mechanism for adjusting positions of the two sets of rounding and straightening mechanisms; the feeding device comprises two kinds of feeding channels for conveying pipe fittings in different pipe diameters; a position switching part for adjusting the positions of the two feeding channels is arranged on the stand; the bending device comprises two kinds of bending channels for bending pipe fittings in different pipe diameters; and a bending bracket is arranged on the stand and is provided with a position switching part for adjusting the positions of the two bending channels. The long U-shaped tube bender has a simple and reasonable structure, is accurately positioned, is convenient to operate and easy for manufacture. On the basis of no dismount and replacement of main parts, the long U-shaped tube bender can be used for processing the pipes in different pipe diameters and has wide processing range.

Description

technical field [0001] The invention relates to a long U pipe bending machine, in particular to a long U pipe bending machine capable of processing two kinds of pipe materials with different pipe diameters. Background technique [0002] As a compact heat exchanger, the tube-fin heat exchanger has a wide range of applications in the refrigeration industry. With the technical development of the air conditioning and refrigeration industry, and the further strict control of environmental protection regulations, the requirements for the heat exchange performance of the heat exchange unit itself are more stringent to compensate for the low performance of alternative refrigerants. Therefore, the heat exchanger structure (type of heat exchange tubes and fins) and the related heat exchanger forming process are important factors affecting the heat exchange performance, and are of great significance for improving the overall heat exchange performance of the heat exchanger. The forming...

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Problems solved by technology

[0003] When the existing long U pipe bending machine bends a long U (the long U is a U-shaped pipe, also known as a hairpin pipe or a U-shaped long pipe), it is necessary to select the corresponding alignment mechanism and feeding mechanism according to the pipe diameter of the pipe fittings. device, bending device, if there are two kinds of pipe diameters to be processed, it is necessary to dismantle and replace the relevant parts on the circle straightening mechanism, feeding device and bending device, and this disassembly and replacement is very troublesome

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