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Graded cooling control system of rod finish rolling

A cold system and finishing rolling technology, applied in metal rolling, temperature control, metal rolling, etc., can solve problems such as space waste, and achieve the effect of avoiding abnormal structure, good rolling line adaptability, and small equipment investment.

Active Publication Date: 2017-01-11
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When rolling small-sized bars, the last finishing mill is often used as a finished product stand, and the looper between the finishing rolling units plays an irreplaceable role, but when rolling larger-sized bars, the finished stand moves forward , the redundant finishing mills need to be dismantled, and the loops between the finishing mills need to be replaced with guide grooves to ensure the smooth passage of the rolled pieces. great waste of space

Method used

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  • Graded cooling control system of rod finish rolling
  • Graded cooling control system of rod finish rolling
  • Graded cooling control system of rod finish rolling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 2 As shown, the finished frame of Φ14mm spring steel bar is a reducing and sizing unit, and the empty looper between 2# flying shear and 13# rolling mill is replaced with a controllable cooling water guide groove to realize controlled cooling before finishing rolling; The empty looper between the 17# rolling mill and the 18# rolling mill is a water-through guide groove with controllable cooling. At the same time, the post-rolling guide tubes after all the finishing mills are replaced with controllable cooling post-rolling guide tubes to realize the controlled cooling in the finishing rolling; in 18 #The first cooling water tank is installed between the rolling mill and the reducing and sizing unit to realize controlled cooling before final rolling; the second cooling water tank is installed between the reducing and sizing unit and 3# flying shear to realize controlled cooling after rolling. Finally, the entrance temperature of finish rolling can be reduc...

Embodiment 2

[0030] Such as image 3 As shown, the finished frame of Φ22mm spring steel bars is the 18# rolling mill, and the empty looper between the 2# flying shear and the 13# rolling mill is replaced with a controllable cooling water guide groove to realize controlled cooling before finishing rolling; The post-rolling conduit behind the #~17# rolling mill is a controllable cooling post-rolling conduit, which realizes the controlled cooling in the finishing rolling; replaces the empty looper between the 17# rolling mill and the 18# rolling mill with a controllable cooling water-through guide groove to realize Controlled cooling before the final rolling; replace the empty looper before the reducing and sizing group as a water-through guide groove with controllable cooling, set the first cooling water tank between the 18# rolling mill and the reducing and sizing group, #A second cooling water tank is installed between the flying shears to realize controlled cooling after rolling. Finally...

Embodiment 3

[0034] Such as Figure 4 As shown, the finished frame of Φ28mm spring steel bars is the 14# rolling mill, and the empty looper between the 2# flying shear and the 13# rolling mill is replaced with a controllable cooling water guide groove to realize controlled cooling before finishing rolling; #The post-rolling conduit behind the rolling mill is a controllable cooling post-rolling conduit, which realizes controlled cooling in the finishing rolling; replaces the empty looper between the 14#~18# rolling mills with a controllable cooling water-through guide groove, between the 18# rolling mill and The first cooling water tank is installed between the reducing and sizing unit, and the second cooling water tank is installed between the reducing and sizing unit and 3# flying shear to realize controlled cooling after rolling. Finally, the entrance temperature of finish rolling can be reduced to 1000°C, the temperature of finish rolling can be reduced to 980°C, the temperature of uppe...

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Abstract

The invention relates to a graded cooling control system of rod finish rolling. The existing old rod finishing mill group layout is rebuilt; dummied loops in the finishing mill group and useless loop mechanisms among finishing mills during product specification replacement are removed; a cooling controllable water passing guide groove is mounted on the original base; rolled conduits of the all finishing mills before a finish product rack are replaced with cooling controllable rolled conduits; a first cooling water tank is arranged between the finishing mill group and a reducing and sizing mill group; and a second cooling water tank is arranged between the reducing and sizing mill group and a No. 3 flying shear. Rolling mill fittings are updated; a cooling control water tank is added; a cooling control equipment layout is designed; the finish rolling temperature of a rod is reduced by stage and step; the temperature control before, during and after finish rolling is achieved for the rod of different types of steel and in different specifications; and controlled cooling of a phase change keypoint is achieved particularly, so that the purposes of improving structure properties of finished rolled pieces, reducing alloy cost, improving product quality and raising a product grade are achieved.

Description

technical field [0001] The invention relates to a graded and controlled cooling system for bar finishing rolling, in particular to a graded and controlled cooling system for rods before finishing rolling, during finishing rolling and after finishing rolling. Background technique [0002] The water-piercing cooling device is an indispensable and important part of the modern rod and wire production line. It is installed between the finishing mills or after the finishing mills, and is used to control the temperature of the rolling process and the cooling temperature of the finished product respectively to achieve improved Purpose of Product Performance. However, in the old-fashioned rod and wire production line, since there is no reserved place for the water-through cooling device, the problems of insufficient cooling capacity and high finish rolling temperature cannot be solved, so only low-grade products can be produced or the mechanical properties of the product can be impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B45/02B21B37/74
CPCB21B37/74B21B45/0224
Inventor 左龙飞张建春李阳麻晗
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE