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Processing technology of serpentine bend of laser welded fin tube

Serpentine bend is a special difficult pipe fitting, which can be divided into cold bend and hot bend.

Generally, the CNC pipe bending is mainly the products processed by CNC machine, and the processing technology is mainly cold bending, for example, the stainless steel pipe bending is processed by this kind of processing technology. 1： According to the drawing provided by the user, set the parameters of CNC machine. Second: put raw materials into machinery for processing. Third: polish the finished products. If the processing requirements of stainless steel bend are not strict, the common bending machine can meet the requirements. This machine is relatively simple to operate. The bending machine is divided into manual bending machine, hydraulic bending machine and numerical control bending machine. The manual bending machine is divided into mechanical manual bending machine and electric manual bending machine. The hydraulic bending machine can also be divided into: torsional shaft synchronization, mechanical hydraulic synchronization, and electro-hydraulic synchronization according to the synchronization mode. Hydraulic bending machine can be divided into: up moving type, down moving type. At present, the most widely used stainless steel pipe bender in the market is the hydraulic automatic pipe bender with core pulling function, because it can install the movable mandrel and anti wrinkle die device, the pipe bending out has good plumpness and beautiful appearance; it is easy to learn and use with microcomputer control; the angle is controlled by encoder, with high angle accuracy; the waste rate is low in mass production.

Production of cold bend: cold bend is a way of bending at normal temperature without heating or changing the material structure. The purpose of cold bend is 1. In all kinds of pipes, it is inevitable to use all kinds of bends, such as ship pipes, automobile oil pipes and other pipes. Compared with other types of elbows, arc elbows have many advantages. First, all kinds of materials flow smoothly at the arc elbows, with small and even impact on the pipe wall; second, arc elbows have small stress concentration, strong and high impact resistance; 2. With the rise of modern steel furniture, office chairs, beach chairs, luggage carts, shopping carts, baby carriages, cribs, computer tables, etc, Several metal pipes form several bright lines, which are practical, convenient, safe and reliable; 3. Air conditioning and refrigeration pipes are basically elbows, small U-shaped pipes, return bends, etc.; 4. There are more and more elbows in the bathroom industry, including faucets, towel racks, S-shaped accessories. 5. Motorcycle, automobile, electric vehicle, bicycle and other means of transportation, car handle, bumper, frame, etc.; 6. Fitness equipment, lighting, construction machinery and other industries. 7.。 The convection heating surface of boiler, such as economizer, superheater and reheater, usually adopts the structure of serpentine tube, with horizontal and vertical layout. The vertical serpentine tube is easy to accumulate water in the tube after shutdown, but easy to support and hoist. The longitudinal pitch of serpentine pipe is related to the bend radius r, which is generally not less than 1.5 times of the outer diameter to ensure the quality of the bend.
By Finned Tube Manufacturer

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