The structure of export products has not improved significantly, the export of metal processing machine tools shows a straight upward trend, and the growth of CNC metal processing machine tools is more than 66%. Among them: the export growth of CNC special processing machine tools, CNC lathes, CNC boring machines, CNC planer milling machines, CNC forming bending machines exceeds the overall growth rate of CNC Tube Grooving.
In daily life can often be exposed to, the scope of use of pipe fittings is very large, to give a definition of pipe fittings, I think that all the products produced by deep processing of pipe fittings should belong to the category of pipe fittings. The more professional reflection of pipe processing machinery in our country is to bend pipe fittings into arc elbows suitable for customer needs. Then pipe fittings have become a product since they are raw materials for pipes through deep processing, so this product has the dual characteristics of pipes and mechanical parts, which is a combination of the two. Pipe is a necessary raw material 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 pipe fittings develop so rapidly in foreign countries, I think there are two outstanding advantages: * It can replace some machined products, and lighter than mechanical parts, castings, structural parts, saving materials; The second is to save processes and working hours than mechanical processing products and reduce the cost of the workpiece. There are many types of pipe fittings, which can be summarized into the following main types: variable diameter pipe fittings, which means that the diameter of the pipe end or a certain part of the pipe is reduced; Pipe fittings with variable wall thickness mean that the wall thickness changes along the length of the pipe.
Change the section of pipe fittings, according to the requirements, the circular section into square, oval, polygon and so on; Bending pipe fittings, we contact more, is to change the straight pipe into a bend with different curvature radius, such as elbow, elbow and so on; Pipe fittings with flange and round edge, the former refers to the pipe end is convex to the inside or outside, the latter refers to the pipe fittings formed in the circumference direction of the pipe uplift or groove; Pipe fittings with rolling edge and sealing bottom, pipe fittings that increase the total strength of the pipe end to the outside or inside of the pipe edge or seal the end of the pipe; Expanding pipe fittings, according to the requirements to expand the end or a part of the pipe fittings to form various shapes of pipe fittings; There are also many processing methods for pipe fittings. Many also belong to the category of mechanical processing, the most used is stamping method, forging method, roller processing method, rolling method, bulging method, stretching method, bending method, and combined processing method. Pipe fitting processing is the organic combination of machining and metal pressure processing. Examples are as follows: Hydraulic bending method: The pipe is put into the mold with hydraulic power to bend the pipe into an arc processing appearance without deformation. Hydraulic bending method: Accurately put the pipe above the bending machine is also the use of a mold with a pressure plate to bend the pipe with good processing area.
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