There is no obvious improvement in the export product structure. The export of metal processing machine tools shows a straight upward trend, and the growth of CNC metal processing machine tools exceeds 66%. Among them: the export growth of CNC special processing machine tools, CNC lathes, CNC boring machines, CNC gantry milling machines, and CNC forming bending machines all exceed the overall growth rate of CNC pipe bending machines.
In daily life, we often come into contact with pipe fittings. The scope of use is very large. To give a definition of pipe fittings, I think all products produced by deep processing of pipes should belong to the category of pipe fittings. The more professional machinery for pipe processing in my country is to bend pipe fittings into arc elbows that meet the needs of customers. Since pipe fittings are made of pipes as raw materials and become a product through deep processing, this product has the dual characteristics of pipes and mechanical parts, which is a combination of the two. Pipes are the necessary raw materials for pipe fittings, but there are many processing methods for pipe fittings. As long as it is a mechanical processing method, it can be applied. Why are pipe fittings developing so rapidly abroad? I think there are two prominent advantages: first, they can replace some machined products, and are lighter than machined parts, castings, and structural parts, saving materials; second, they save processes and working hours compared to machined products, reducing workpiece costs. There are many types of pipe fittings, which can be summarized into the following main types: variable diameter pipe fittings, which refer to the reduction of the diameter of the pipe end or a certain part of the pipe; variable wall thickness pipe fittings, which refer to the change of wall thickness along the length of the pipe.
Pipe fittings with changed cross-sections, according to requirements, the circular cross-section can be changed into square, elliptical, polygonal, etc.; bent pipe fittings, which we are more exposed to, are to change straight pipes into curved pipes with different curvature radii, such as elbows, elbows, etc.; pipe fittings with flanges and round edges, the former refers to the pipe end convex to the inside or outside, and the latter refers to the pipe fittings with ridges or grooves formed in the circumferential direction of the pipe; pipe fittings with curling and bottom sealing, increase the total strength of the pipe end by curling to the outside or inside of the pipe or sealing the end of the pipe fitting; expanded diameter pipe fittings, according to requirements, expand the end or a certain part of the pipe fitting to form pipe fittings of various shapes; there are many processing methods for pipe fittings. Many of them still belong to the category of mechanical processing, and the most commonly used are stamping, forging, roller processing, rolling, bulging, stretching, bending, and combined processing. Pipe fitting processing is an organic combination of machining and metal pressure processing. Here are some examples: Hydraulic bending method: put the pipe into the mold and use hydraulic power to bend the pipe into an arc. The processing appearance is good and not deformed. Hydraulic bending method: put the pipe accurately on the bending machine and use the mold to bend the pipe with a pressure plate. The effect is good and the processing area of the pipe is wide.