Continuous rolling seamless steel pipe rolling process and device
A seamless steel pipe and process technology, applied in the field of seamless steel pipe rolling, can solve the problems of high investment cost, inability to high-end small-diameter hot-rolled seamless steel pipe, high energy consumption, etc., to reduce quantity, equipment and tool investment , The effect of reducing equipment investment
Active Publication Date: 2016-08-17
太原磬泓机电设备有限公司
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Problems solved by technology
[0002] The existing seamless steel pipe rolling in my country is generally produced by the device of "5-stand continuous rolling mill + 3-stand pipe removal machine + 24-stand tensioning and reducing machine", but this device has the following disadvantages: (1) It cannot use heat Rolling process to produce Φ28, Φ32 and other high-end small-diameter hot-rolled seamless steel pipes; (2) High energy consumption and high investment cost
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[0027] The present invention will be further described below in conjunction with the accompanying drawings.
[0028] A continuous rolling seamless steel pipe rolling process, which is characterized in that Φ28, Φ32~ Φ89 high-end precision small-diameter thin-walled hot-rolled seamless steel pipe.
[0029] Specifically, the steps of the above-mentioned rolling process are:
[0030] (1) After the tube blank is heated in the heating furnace, it is sent to the fungal piercer for perforation and rolling into a thin-walled capillary tube. The maximum extension coefficient of the fungal piercer can reach 5, and the diameter expansion is 1.4;
[0031] (2) After the rolled capillary is subjected to sandblasting and nitrogen blowing anti-oxidation measures, it is sent by the feeding mechanism to the two-roller four-stand restraint mandrel continuous rolling mill to be rolled into a barren tube, and the maximum elongation coefficient of the continuous rolling mill is 2.8;
[0032] (3) ...
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The invention discloses a process and a device for rolling continuously rolled seamless steel tubes and belongs to the technical field of rolling of seamless steel tubes. The process for rolling the continuously rolled seamless steel tubes comprises the following steps: after tube blanks are heated in a heating furnace, rolling the tube blanks into the high-end precise small-caliber thin-wall hot-rolled seamless steel tubes with specifications of phi 28, phi 32 to phi 89 sequentially by a fungoid type punching machine, a four-rack continuous rolling machine, a five-rack extracting mill and a sixteenth-rack stretch-reducing mill. According to the process and the device for rolling the continuously rolled seamless steel tubes, equipment investment is reduced and the finished product rate of the steel tube is improved.
Description
technical field [0001] The invention belongs to the technical field of seamless steel pipe rolling, and in particular relates to a continuous rolling seamless steel pipe rolling process and device. Background technique [0002] The existing seamless steel pipe rolling in my country is generally produced by the device of "5-stand continuous rolling mill + 3-stand pipe removal machine + 24-stand tensioning and reducing machine", but this device has the following disadvantages: (1) It cannot use heat Rolling process produces Φ28, Φ32 and other high-end small-diameter hot-rolled seamless steel pipes; (2) High energy consumption and high investment costs. [0003] At present, the domestic production of small-diameter steel pipes below Φ32 still adopts the "piercing + cold drawing (rolling)" production process that clearly requires the elimination of high pollution and high energy consumption in my country's "Iron and Steel Industry "Twelfth Five-Year Plan" Development Plan". [0...
Claims
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IPC IPC(8): B21B23/00B21B19/04
Inventor 张国庆姜长华李春苗刘徐军
Owner 太原磬泓机电设备有限公司