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冷轧无缝钢管和冷拔无缝钢管相结合的冷加工方法

2018-12-02 17:23:42 常州市星火铝艺制品有限公司 阅读

依据金属的钣金加工性能、管材尺寸、质量要求以及投资和效益来选择不同的钣金加工方法及相应的辅助工序。冷轧冷拔无缝钢管和冷拔冷拔无缝钢管的基本工序有:(1)管料供给,所用管料为热轧无缝钢管成品管或管坯半成品管、挤压管以及焊接管;(2)管料准备,包括检查、打捆、酸洗、清洗、冲洗、中和、烘干、涂润滑剂等;(3)冷加工(冷轧或冷拔);(4)成品精整包括成品热处理、矫直、取样、切头尾、检查(人工检查和各种探伤)、水压试验、涂油、包装、入库等。不同的产品精整内容有所差异。

According to metal processing performance, pipe size, quality requirements and investment and benefit, different processing methods and corresponding auxiliary processes are selected. The basic processes of cold-drawn seamless steel pipe and cold-drawn seamless steel pipe are: (1) pipe material supply, using hot-rolled seamless steel pipe finished pipe or semi-finished pipe billet, extrusion pipe and welded pipe; (2) pipe material preparation, including inspection, bundling, pickling, cleaning, washing, neutralization, drying, coating lubricant, etc.; (3) cold processing (3) cold processing Cold rolling or cold drawing; (4) Finishing of finished products includes heat treatment, straightening, sampling, cutting head and tail, inspection (manual inspection and various flaw detection), water pressure test, oiling, packaging, storage, etc. Different products have different finishing contents.

冷轧和冷拔相结合的冷加工方法生产管材的整套装备组合。是对热轧管材或焊接管进行深度加工的机组。

A complete set of equipment combination for pipe production by cold rolling and cold drawing. It is a deep processing unit for hot-rolled pipe or welded pipe.

冷拔无缝钢管加工管机组生产特点是管料从投入到加工成成品通常要经过多次冷变形并产生加工硬化,因而整个生产过程由多个准备工序和变形工序组成,且具有往复循环的特点,因而工序多,生产周期长、金属消耗较大,生产效率较低,高精密度,内外表面光亮光滑,无起皮,无裂纹,无麻坑。

The production characteristics of cold-drawn seamless steel pipe processing unit are that the pipe material usually undergoes many cold deformation and hardening processes from input to finished product. Therefore, the whole production process is composed of several preparation processes and deformation processes, and has the characteristics of reciprocating cycle. As a result, there are many processes, long production cycle and large metal consumption. Low productivity, high precision, bright and smooth inner and outer surface, no peeling, no cracks, no pits. 冷拔无缝钢管性能与作用

Performance and Function of Cold Drawn Seamless Steel Pipe

1 、自重轻、强度高,运输安装方便。采用纤维缠绕生严的夹砂玻璃钢管道,其比重在 1.65-2.0 ,只有钢的 1 / 4 ,但冷拔无缝钢管的环向拉伸强度为 180 - 300MPa ,轴向拉伸强度为 60 - 15OMPa ,近似合金钢。因此,其比强度(强度/比重)是合金钢的 2 一 3 倍。这样它就可以接用户的不间要求,设计成满足各类承受内、外压力要求的管道。对于相同管径的单重。 FRP 管只有碳素钢管(钢板卷管)的 1/2.5 ,铸铁管的 1/3.5 ,预应力钢筋水泥管的 1/8 左右,因此运输安装十分方便。冷拔无缝钢管道每节长度 12 米,比混凝土管可减少三分之二三财接头。它的承插连接方式,安装快捷简便,同时降低了吊装费用,提高了安装速度。

1. Light weight, high strength, convenient transportation and installation. The proportion of fibre-wound sand-filled FRP pipe is 1.65-2.0, only 1/4 of steel, but the circumferential tensile strength of cold-drawn seamless steel pipe is 180-300 MPa, and the axial tensile strength is 60-15 OMPa, which is similar to alloy steel. Therefore, the specific strength (strength/specific gravity) of the alloy steel is 23 times as high as that of the alloy steel. In this way, it can meet the user's uninterrupted requirements and be designed to meet all kinds of pipelines to withstand internal and external pressure requirements. For the same diameter of the single weight. FRP pipe is only 1/2.5 of carbon steel pipe (steel coiled pipe), 1/3.5 of cast iron pipe and 1/8 of pre-stressed reinforced concrete pipe. Therefore, transportation and installation are very convenient. The length of cold-drawn seamless steel pipe is 12 meters per section, which can reduce two-thirds of the financial joints compared with concrete pipe. Its socket connection mode is fast and simple to install, while lowering the hoisting cost and improving the installation speed.

2 、防污抗蛀。不饱和聚酯树脂的表面洁净光滑,不会被海洋或污水中的甲贝、菌类等微生物站污蛀附,以致增大糙率;减少过水断面,增加维护费用。冷拔无缝钢管道无这些污染,长期使用洁净如初。同时由于其内壁光滑,且有优异的抗蚀性能,不会产生水垢和微生物的滋生,有效保证水质,保持水阻的稳定。而传统管材还存在日后水阻增大和表面结垢的现象。

2, anti pollution and anti borer. The surface of unsaturated polyester resin is clean and smooth, and it will not be contaminated by shellfish, fungi and other microbial stations in ocean or sewage, so as to increase roughness, reduce cross-section and increase maintenance costs. Cold-drawn seamless steel pipes are clean for long-term use without these pollution. At the same time, because of its smooth inner wall and excellent corrosion resistance, it will not produce scales and microorganisms, effectively ensure the water quality and maintain the stability of water resistance. However, the traditional pipe still has the phenomenon of increasing water resistance and surface scaling in the future.

3 、耐热性、抗冻性好。在一 30 ℃状态下,仍具有良好的韧性和极高的强度,可在一 50 ℃- 80 ℃的范围内长期使用,采用特殊配方的树脂还可在 11O ℃以上的温,及工作。

3. Good heat resistance and frost resistance. Under the condition of 130 C, it still has good toughness and extremely high strength. It can be used for a long time in the range of 150 - 80 C. The resin with special formulation can also work at temperature above 11O C.

4 、耐腐蚀性好,对水质无影响。冷拔冷拔无缝钢管道能抵抗酸、碱、盐、海水、未经处理的污水、腐蚀性土壤或地下水及众多化学流体的侵蚀。比传统管材的使用寿命长,其设计使用寿命一般为 50 年以上。对夹砂玻璃冷拔钢管道而言,更多的是在市政、城市输配管网方面的应用,由于其具有无毒、无锈、无味、对水质无二次污染、无需防腐、使用寿命大大延长、安装简便等优点,因此,受到了给排水行业的欢迎。

4. It has good corrosion resistance and has no effect on water quality. Cold-drawn seamless steel pipe can resist the erosion of acid, alkali, salt, seawater, untreated sewage, corrosive soil or groundwater and many chemical fluids. Compared with the traditional pipe, its service life is longer, and its design service life is generally more than 50 years. For sand-laden FRP pipe, it is more used in municipal and urban transportation and distribution network. Because of its non-toxic, rustless, tasteless, no secondary pollution to water quality, no need for corrosion protection, long service life, simple installation and other advantages, it is welcomed by the water supply and drainage industry.



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