A kind of U-shaped pipe chipless forming machine and its working method

Abstract

The invention discloses a U-shaped pipe chip-free forming machine and its working method. The main point of the technical solution is to include a frame, and the frame is respectively equipped with a feeding device and a clamping die for clamping pipe fittings. device, a bending device, an anti-slope device and a material cutting mechanism for preventing a bevel when the pipe is bent, the bending device includes a mounting plate that can be driven to turn over, and a mounting plate A profile that turns over together to bend the tube. The anti-slope mouth pipe sleeve of the present invention always supports the nozzle of the copper pipe when the copper pipe is bent, and prevents the side of the copper pipe with a small diameter from elongating, which can effectively prevent the deformation of the nozzle and ensure the quality of the U-shaped pipe. , the mandrel is inserted into the bending position of the copper tube, which can effectively prevent the copper tube from being wrinkled and deformed.

Description

【Technical field】 [0001] The invention relates to a U-shaped tube chipless forming integrated machine and a working method thereof. 【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 process of the heat exchanger mainly has the following three forming pro...

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Problems solved by technology

[0003] The existing U-shaped pipe bending machine and its working method have at least four disadvantages: first, if there is no anti-slope device, when the copper pipe is bent, the end of the outer ring of the pipe will shrink, and the end of the inner ring of the pipe will elongate As a result, the nozzle is deformed into a bevel. The usual treatment method is to cut off the deformed bevel, but this will lead to waste of materials; second, when cutting the nozzle, burrs will be generated, so there must be a process to deal with the burrs. This will lead to an increase in the production process and production costs; third, the copper tube is easily squeezed and deformed during bending, and is usually flattened, resulting in a high rate of defective products; fourth, the degree of automation is too low

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