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Direct current assistance based silicon steel cold rolling process

A technology of DC current and DC power supply, applied in metal rolling, manufacturing tools, metal rolling, etc., can solve the problems of increasing investment in fixed equipment, deteriorating the surface quality of finished products, adding additional equipment, etc., achieving small investment and improving surface processing Quality, reduce the effect of edge cracking and broken belt

Inactive Publication Date: 2020-06-09
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to add additional equipment and increase investment in fixed equipment. In addition, preheating and heat preservation will increase energy consumption per ton of steel and deteriorate the surface quality of finished products.

Method used

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  • Direct current assistance based silicon steel cold rolling process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A cold rolling process of silicon steel based on DC current assistance. The silicon steel described in this embodiment is 1.5% non-oriented silicon steel, the thickness of the blank is 2 mm, and the thickness of the finished product is 0.5 mm.

[0035] The silicon steel cold rolling process such as figure 1 Shown:

[0036] 1), first uncoil the silicon steel billet through the uncoiler 1, start the rolling mill 9, the rolled piece 2 passes through the front guide roller 3, the rolling mill 9 and the rear guide roller 7 to thread the strip, and the rolled piece 2 is coiled by the coiler 8 2 laps, the tension is established, the rolling mill 9 is accelerated, and the rolled piece 2 enters the stable rolling stage.

[0037] 2) When the rolling piece 2 enters the stable rolling stage, the lubricated rolling process is adopted, and the DC power supply 5 is turned on at the same time to apply a DC current to the rolling piece 2 for rolling.

[0038] 3) When entering the rol...

Embodiment 2

[0041] A cold rolling process of silicon steel based on DC current assistance. The silicon steel described in this embodiment is 2.5% non-oriented silicon steel, the thickness of the blank is 2 mm, and the thickness of the finished product is 0.35 mm.

[0042] The silicon steel cold rolling process such as figure 1 Shown:

[0043] 1), first uncoil the silicon steel billet through the uncoiler 1, start the rolling mill 9, the rolled piece 2 passes through the front guide roller 3, the rolling mill 9 and the rear guide roller 7 to thread the strip, and the rolled piece 2 is coiled by the coiler 8 3 laps, the tension is established, the rolling mill 9 accelerates, and the rolled piece 2 enters the stable rolling stage.

[0044] 2) When the rolling piece 2 enters the stable rolling stage, the lubricated rolling process is adopted, and the DC power supply 5 is turned on at the same time to apply a DC current to the rolling piece 2 for rolling.

[0045] 3) When entering the rolli...

Embodiment 3

[0048] A cold rolling process of silicon steel based on DC current assistance. The silicon steel described in this embodiment is 3.5% oriented silicon steel, the thickness of the blank is 2 mm, and the thickness of the finished product is 0.5 mm.

[0049] The silicon steel cold rolling process such as figure 1 Shown:

[0050] 1), first uncoil the silicon steel billet through the uncoiler 1, start the rolling mill 9, the rolled piece 2 passes through the front guide roller 3, the rolling mill 9 and the rear guide roller 7 to thread the strip, and the rolled piece 2 is coiled by the coiler 8 2.5 circles, the tension is established, the rolling mill 9 is accelerated, and the rolling piece 2 enters the stable rolling stage.

[0051] 2) When the rolling piece 2 enters the stable rolling stage, the lubricated rolling process is adopted, and the DC power supply 5 is turned on at the same time to apply a DC current to the rolling piece 2 for rolling.

[0052] 3) When entering the r...

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Abstract

The invention discloses a direct current assistance based silicon steel cold rolling process. According to the technical scheme, firstly a silicon steel blank is uncoiled, a rolling mill (9) is started, tape threading is performed, coiling is performed for 2 -3 circles, tension force is established, and the rolling mill (9) is accelerated and enters a stable rolling stage; then a lubrication rolling process is adopted, a direct-current power supply (5) is turned on, a rolled piece (2) is loaded with direct current, and rolling is performed; and when the rolling mill enters a final rolling stage, the direct-current power supply (5) is turned off, and coiling is performed. The direct current is loaded through two electric brush sets, wherein the first electric brush set (4) in front of the rolling mill (9) is connected with the positive electrode of the direct-current power supply (5), the second electric brush set (6) behind the rolling mill (9) is connected with the negative electrodeof the direct-current power supply (5), and the first electric brush set (4) and the second electric brush set (6) are in direct contact with the surface of the rolled piece (2); and the first electric brush set (4) and the second electric brush set (6) form a current loop through the rolled piece (2), and the current density of the cross section of the rolled piece (2) is 5-40 A / mm<2>. The process has the advantages of small investment, low energy consumption, high silicon steel rolled piece surface quality and high yield.

Description

technical field [0001] The invention belongs to the technical field of silicon steel cold rolling. In particular, it relates to a direct current auxiliary silicon steel cold rolling process. Background technique [0002] The rolling process is the most common and economical production method for the processing of non-ferrous metal materials and ferrous metal materials, and is usually carried out in the form of a rolling mill combination unit. With the increase of silicon content, the magnetism and resistivity of silicon steel will increase, but at the same time, the increase of deformation resistance and the decrease of plasticity will lead to the deterioration of cold rolling processability. During the cold rolling process, the cracks at the edge of the steel plate are dense. At this time, under the action of tension, the cracks are extremely sensitive and rapidly expand, which may easily lead to problems such as edge cracks and strip breakage. [0003] In order to solve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/34B21B15/00B21B45/00B21B45/02
CPCB21B1/34B21B15/00B21B45/00B21B45/0251B21B2015/0057
Inventor 李立新叶奔程书鹏张诗昌
Owner WUHAN UNIV OF SCI & TECH
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