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Purging device for cleaning line-free mill

A non-cleaning, rolling mill technology, used in metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of inability to purify the emulsion liquid film, the formation of black strips on the surface of the strip, and the high amount of emulsion residues, to reduce Equipment replacement cost, the effect of reducing the emulsion on the board surface

Inactive Publication Date: 2011-10-19
NANJING MEISHAN METALLURGY DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, nipple-shaped purging devices are commonly used in rolling mills, which are very effective in reversible cold rolling mills with plate surface cleaning processes such as pickling→rolling→cleaning→annealing→leveling; but our current production process is improved to Pickling→rolling→annealing→leveling, due to the lack of cleaning process, the original nipple-mounted purging device only partially purged the plate surface, and could only purge off the visible emulsified droplets, but could not remove the attached The emulsified liquid film on the plate surface is blown away, resulting in a high residual amount of the emulsified liquid on the plate surface, which is cracked at high temperature during annealing, and black belts are easily formed on the surface of the plate strip

Method used

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  • Purging device for cleaning line-free mill
  • Purging device for cleaning line-free mill
  • Purging device for cleaning line-free mill

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Such as figure 1 with figure 2 As shown, experienced fitters use measuring tools such as angle plates, feeler gauges, and spirit levels, and use steel rulers to simulate the direction of laminar flow for angle adjustment to ensure that the installation angle of the purge nozzle 1 on the purge beam 2 is accurate. Compressed air of 0.5Mpa is pressed in from the compressed air inlet 0, and enters the purge nozzle 1 through the purge pipe, and the emulsion sprayed from the emulsion nozzle 3 forms a laminar flow at the purge nozzle 1, and its state is as follows figure 2 As shown by the dotted line, the emulsion does not drip onto the surface of the rolled piece 4 when the rolled piece 4 passes the roll 5, thereby avoiding the problem of black bands caused by the annealing caused by the residual emulsion. Sampling the board surface after purging and sending it to Meigang Science and Technology Center to test the residue on the board surface, the test result is 1.76mg / m 2...

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Abstract

The invention relates to a purging device for a mill, in particular to a purging device for a cleaning procedure-free mill. In order to overcome defects that the residual amount of emulsion on a surface is high and a black band is easily formed on the surface of a strip in the cleaning procedure-free mill, the invention provides a surging device for a cleaning line-free mill, which comprises a purging pipe. One end of the purging pipe is provided with a compressed air inlet, and the other end of the purging pipe is provided with an outlet communicated with a purging nozzle. Compared with the prior art, the purging device has the advantage that: the purging nozzle has a duckbill shape to ensure no black band on the surface of a rolled piece in a cleaning procedure-free cold rolling process so as to meet the requirement on the surface of a cold-rolled sheet.

Description

[0001] technical field [0002] The invention relates to a purging device for a rolling mill, in particular to a purging device for a rolling mill without a cleaning process. Background technique [0003] At present, nipple-shaped purging devices are commonly used in rolling mills, which are very effective in reversible cold rolling mills with plate surface cleaning processes such as pickling→rolling→cleaning→annealing→leveling; but our current production process is improved to Pickling→rolling→annealing→leveling, due to the lack of cleaning process, the original nipple-mounted purging device only partially purged the plate surface, and could only purge off the visible emulsified droplets, but could not remove the attached The emulsified liquid film on the surface of the plate is blown away, resulting in a high residual amount of emulsion on the plate surface, which is cracked at high temperature during annealing, and black bands are easily formed on the surface of the pla...

Claims

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Application Information

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IPC IPC(8): B21B45/00
Inventor 李永志唐晓晖张志军
Owner NANJING MEISHAN METALLURGY DEV
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