Continuous annealing apparatus

Patent metadata

Field	Value
Publication number	US-10597749-B2
Application number	US-201715830852-A
Country	US
Kind code	B2
Filing date	Dec 4, 2017
Priority date	Jul 25, 2017
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

A continuous annealing apparatus includes: a pre-treatment device to prepare a strip unwound from a coil; a heating device to heat the strip prepared by the pre-treatment device; a heat holding device to isothermally maintain the strip heated by the heating device; a first cooling device to cool the strip heat-maintained by the heat holding device; an annealing device including a first annealing device for annealing the strip, which, is cooled by the first cooling device, for a first time, and a second annealing device for winding the strip, which is cooled by the first cooling device, into a coil and then unwinding the coil into the strip again after annealing for a second time; a second cooling device to cool the strip annealed by the first annealing device or the second annealing device; and a post-treatment device to wind the strip cooled by the second cooling device into the coil.

First claim

What is claimed is:

1. A continuous annealing apparatus for continuously annealing a strip, the continuous annealing apparatus comprising:
a pre-treatment device to prepare a strip unwound from a coil to continuously anneal the strip;
a heating device to heat the strip prepared by the pre-treatment device;
a heat holding device to isothermally maintain the strip heated by the heating device;
a first cooling device to cool the strip heat maintained by the heat holding device;
an annealing device comprising:
a first annealing device disposed adjacent to a side of the first cooling device and annealing the strip, which is cooled by the first cooling device, for a first time; and
a second annealing device disposed adjacent to the side of the first cooling device and winding the strip, which is cooled by the first cooling device, into a coil and then unwinding the coil into the strip again after annealing for a second time which is a longer period of time than the first time;

a second cooling device to cool the strip annealed by the first annealing device or the second annealing device; and
a post-treatment device to wind the strip cooled by the second cooling device into the coil,
wherein the second annealing device comprises:
a cutting machine to cut the strip cooled by the first cooling device into a predetermined length;
a continuous coil winding machine to wind each of strips transferred through the cutting machine into a coil;
a coil feeding device to transfer the coil wound by the continuous coil winding machine;
a heat treatment device to anneal the coil for the second time;
a main coil unwinding reel to unwind the coil heat-treated by the heat treatment device into a strip again; and
a welding machine to weld preceding and trailing strips unwound from the main coil unwinding reel to each other.

2. The continuous annealing apparatus according to claim 1 , wherein the first annealing, device of the annealing device is a continuous annealing line (CAL), and the second annealing device is a batch annealing furnace (BAF).

3. The continuous annealing apparatus according to claim 1 , wherein the second annealing device further comprises:
an auxiliary coil unwinding reel to unwind an auxiliary strip wound together with the strip wound by the continuous coil winding machine;
a pressure roll to press the auxiliary strip unwound from the auxiliary coil unwinding reel onto one surface of the strip to transfer the auxiliary strip to the continuous coil winding machine; and
an auxiliary coil winding reel to separate the auxiliary strip from the strip unwound from the main coil unwinding reel to wind the auxiliary strip.

4. The continuous annealing apparatus according to claim 3 , wherein the auxiliary strip is a porous metal strip.

5. The continuous annealing apparatus according to claim 1 , wherein the continuous coil winding machine comprises:
first and second winding reels on which the strips cut in the predetermined length are wound respectively; and
a rotary body in which the first and second winding reels are spaced apart from each other and are alternately arranged at winding positions.

6. The continuous annealing apparatus according to claim 1 , wherein the heat treatment device comprises:
a heat treatment furnace in which the coil is accommodated;
a coil support rotatably disposed in the heat treatment furnace to seat the coil;
a motor generating power for rotating the coil support;
first and second gas, diffusers disposed in respective upper and lower portions of the coil support to discharge circulation gas to the coil and then suck the circulation gas;
a gas pipe connected to the first and second gas diffusers to form a circulation passage for the circulation gas;
a pump disposed on the gas pipe for flow of the circulation gas; and
a heater disposed on the gas pipe to heat the circulation gas.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Kwon Soon Woo
• Kang Min Woo
• Bae Moon Ki
• Hong Seung Hyun

Classifications

• C21D9/562 Primary

  Details · CPC title

• F27B9/12

  with special arrangements for preheating or cooling the charge · CPC title

• F27D7/04

  Circulating atmospheres by mechanical means · CPC title

• F27B19/04

  arranged for associated working · CPC title

• F27D2099/0085

  Accessories · CPC title