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Method for rolling large round bar by using bloomer

A billeting machine and round steel technology, applied in the field of steel rolling, can solve the problems of low production efficiency, high equipment requirements, and high production costs, and achieve the effects of high production efficiency, market expansion, and high production costs

Inactive Publication Date: 2011-07-13
JIANGSU SHAGANG GROUP HUAIGANG SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that the production efficiency is low, the production cost is high, the equipment requirements are high, and the investment is large

Method used

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Embodiment Construction

[0019] The tapping temperature of the round billet is controlled at 1150-1200°C. The iron oxide chips on the surface of the billet are removed by a high-pressure water dephosphorization machine, and then enter the billet opening machine for rolling. A closed archway-type two-roller reversible blanking mill (roller diameter is Φ1100mm) is selected to carry out double-roller reciprocating rolling on a Φ500 round billet to produce a Φ480mm round steel. In order to ensure the safety of the equipment, a transition pass is added, that is, the Φ500 round billet is first rolled into a Φ490mm large round bar, and then rolled into a Φ480mm large round bar in the transition pass. The rolling pass is a round pass, and the base circle diameter of each pass is D=d×1.013 (that is, the Φ500 round billet is rolled into a Φ490mm large round steel, and the base circle diameter is 490×1.013≈496.4mm. The transition pass base The diameter of the circle is 480×1.013≈486.2mm), the opening angle of th...

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Abstract

The invention discloses a method for rolling a large round bar by using a bloomer. In the method, the rolling holes are round holes, the diameter D of the base circle of each hole is equal to dx1.013, the aperture angle of the holes is 120 DEG, the depth of a groove is 130 to 160 millimeters, the rolling reduction is no more than 10 millimeters at each time of rolling, a round blank is turned an angle of about 120 DEG by a manipulator of a breaking down mill at each time of rolling, then the round blank is hold by the manipulator to be delivered into the breaking down mill to be rolled again,and the round bland, after being rolled, is rotated an angle of about 120 DEG and then delivered to be rolled, and the round blank is rolled for 3 to 4 times likewise. When the diameter of the round blank is more than 10 millimeters larger than that of a finished product, the round blank is added with a transitional hole for each excessive 10 millimeters. In the method, the round bar production specifications are increased, the production mode is diversified and a new process for rolling a large round bar by a large round blank is created.

Description

Technical field: [0001] The invention relates to the field of steel rolling, in particular to a method for rolling large round steel with a blanking machine Background technique: [0002] At present, the use of rectangular billets or round billets to produce large round steel, no matter which of the following equipment (continuous rolling mill, billet mill, horizontal rolling mill), the largest diameter of the large round steel produced is less than Φ350mm. For example: use the blanking machine to directly produce large round steel, the pass system is an ellipse-round pass system, and the current domestic production specifications are generally ≤Φ250mm. The billet is opened by the billet opener, rolled into a rectangular billet with a certain cross-section, and then rolled into a large round steel in a continuous rolling mill. The production specification is generally ≤Φ350mm. The large round steel is rolled out by a transverse rolling mill, and the billets used mainly incl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B39/20B21B1/00
Inventor 张银生夏兆春袁文军陈子坤
Owner JIANGSU SHAGANG GROUP HUAIGANG SPECIAL STEEL CO LTD
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