Current label: Square tube manufacturing
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Production and manufacturing of square tubes: many defects of square tubes are formed in the process of piercing, so the piercing process of tube blanks is the key process of consuming square tubes. The main difficulty of high alloy piercing is the low piercing performance. In order to ensure the quality, it is necessary to rationally select the deformation parameters of piercing. A small tightening amount will cause instability in the perforation process, so the critical tightening amount per hour should be the first tightening amount
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In order to prevent the square tube from showing the defect of hot cracking, we can take the following eight measures: (1) According to the pipe structure, size, length and width, thickness, etc., design a correct and reasonable gating system structure and setting position. In the process of condensation line shrinkage, ensure the temperature difference is balanced, and then solidify in order to make the square tube shrink normally and freely. (2) According to the mud core structure, the core bone structure shall be manufactured with corresponding rigidity
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Process of seamless rectangular pipe: ① main consumption process of hot rolled seamless rectangular pipe (main inspection process): preparation and inspection of pipe blank → heating of pipe blank → piercing → pipe rolling → reheating of raw pipe → sizing (reducing) → heat treatment → straightening of waste pipe → finishing → inspection (non-destructive, physical and chemical, bench inspection) → warehousing ② cold rolling (drawing) Main consumption process of seamless rectangular tube: blank preparation → pickling
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Manufacturing process of precision seamless steel pipe: precision seamless square pipe is extremely low in cold bending deformation, and can be used for various complex deformation and machining treatment. Color of square tube: white with light, also with welding. The chemical composition of precision bright tube includes carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P and chromium Cr. Introduction to precision bright tube process: good carbon steel, finish rolling, non oxidation bright heat treatment(
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And it shall be tied with the vertical pole to tighten the horizontal pole. Structural requirements for square pipes: when the erection height exceeds 40m and there is wind vortex effect, the structural requirements for square pipes shall conform to the following rules: 1. The longitudinal distance and step distance of degree poles of single and double row square pipes shall not be greater than 2.1m, and transverse diagonal braces shall be set. 2. The upper part of the top layer of the portal frame, the setting layer of the wall connecting parts, and the protective shed
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Introduction to rectangular tubes: There are two main consumption modes of rectangular tubes, namely, cold rolling and hot rolling. Rectangular tube hot rolling is made of hot rolled strip steel after processing. Cold drawn or cold rolled fine rectangular tubes. Cold rolled rectangular tubes are cold drawn or cold rolled fine rectangular tubes with high dimensional accuracy and good external brightness for mechanical structures and hydraulic equipment. Cold drawn rectangular tube is used as the starting material