The stamping elbow is one of the elbow fittings, which has a good development trend at home and abroad, and can produce good effects in actual performance. The basic process is to first weld a polygonal ring with a polygonal cross section. The shell or the multi-edge fan-shaped shell closed at both ends, after the internal pressure is filled with the pressure medium, the internal pressure is applied, and the cross-section gradually changes from a polygon to a circle under the action of internal pressure, and finally becomes a circular ring shell. The punching elbow has good Production and processing technology can produce good performance and value in actual use and production, produce certain value and contribution to different industries, and meet the performance value of different industries.
The advantages of stamping elbows are mainly reflected in the following aspects:
(1) The blank is a flat plate or a developable curved surface, so the blanking is simple, the precision is easy to ensure, and the assembly and welding are convenient.
(2) No need for tube blanks as raw materials, which can save the cost of pipe making equipment and molds, and can obtain elbows with any large diameter and relatively thin wall thickness.
(3) Due to the above two reasons, the manufacturing cycle can be shortened, and the production cost is greatly reduced. Since no special equipment is needed, it is especially suitable for processing large-scale stamping elbows on the spot. A3, 16Mn seamless steel tubes are widely used at home and abroad, resulting in serious pipelines. Wear and frequent replacement, a relatively mature cast stone pipe Although the cast stone itself has a high hardness, due to process reasons, the thickness of the cast stone pipe is large, stupid, large, stupid, thick, and is greatly used in use. Restriction. In addition, the cast stone is brittle and easy to break, which brings great difficulties to transportation and installation.
When choosing a stamping elbow, we must pay attention to the choice of materials. After all, the stamping elbow sometimes determines the quality of the whole pipeline to a certain extent. At the same time, we must also consider the overall strength of the pipeline and elbow. In electricity, mining, metallurgy In other industries, the transportation and output of materials are all close-range, high-pressure conveying, the pipeline is subjected to considerable pressure, and subjected to severe wear. It is difficult to meet the requirements of this condition in a single material pipeline, especially the elbow. Because of its safety and service life, the focus is on improving the toughness, impact resistance and wear resistance of the pipeline lining.
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