JPH0718753Y2 - Vertical continuous heat treatment furnace for non-ferrous strips - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical continuous heat treatment furnace for non-ferrous strips.

[0002]

2. Description of the Related Art Non-ferrous strips such as aluminum or copper alloys are subjected to various heat treatments such as solution treatment or annealing treatment. By the way, in the solution treatment, after heating and soaking the strip,
Water cooling is performed immediately, while in the annealing process,
After the strip is heated, it is rapidly cooled by cold air and then cooled by water, and each treatment step is different.

Therefore, conventionally, there has been a problem that a dedicated furnace corresponding to each heat treatment is provided, resulting in an increase in equipment cost and a low operating rate. Further, in any of the above-mentioned furnaces, since the furnace body and the cooling water tank are simply communicated with each other through the communication portion, if the strip bends in the width direction during the treatment step, it is water-cooled as it is. Or, the strip may have a bad shape due to bending due to rapid cooling with water cooling. In view of the above-mentioned conventional problems, the present invention enables solution treatment and annealing treatment of non-ferrous strip in one vertical continuous heat treatment furnace, and prevents vertical defect of the strip of non-ferrous strip that can prevent strip shape defect. An object is to provide a heat treatment furnace.

[0004]

In order to achieve the above-mentioned object, the present invention provides a vertical continuous heat treatment furnace for non-ferrous strips, which includes a vertical heating zone and a vertical processing zone provided with heating means and cooling means. The cooling water tank is arranged below the vertical processing zone via a communication section, and a roller leveler capable of moving up and down is provided in the communication section.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The vertical continuous heat treatment furnace for non-ferrous strips according to the present invention is generally composed of a vertical heating zone 1, a vertical treatment zone 5, a cooling water tank 10 and a roller leveler unit 11.

In the vertical heating zone 1, two nozzle headers 2 and 2 are vertically arranged at a predetermined interval, and a large number of nozzles 3 are provided on the opposing surfaces of the nozzle headers 2 and 2. The nozzle headers 2 and 2 are provided with high-temperature combustion gas from a heating means 4 including a burner or the like, and the non-ferrous strip W is heated by the hot air ejected from the facing nozzles 3. The vertical processing belt 5
Is provided so as to communicate with the lower extraction port of the vertical heating zone 1, and nozzle headers 6 and 6 having a large number of nozzles 7 having the same structure as in the vertical heating zone 1 on the opposite surfaces are provided inside. There is. Further, the nozzle headers 6 and 6 are communicated with a heating means 7 composed of a burner and a cooling means 8 composed of a cooler, so that the vertical processing zone 5 is soaked and gradually heated as described below according to the processing purpose. It is designed to function as a cold or quench zone. The cooling water tank 10 is installed below the vertical processing zone 5, and the communication portion 9 provided on the lower surface of the vertical processing zone 5 is immersed in the water of the cooling water tank 10 and the roller leveler is provided in the communication portion 9. The unit 11 is arranged so as to be vertically movable, and each roller 12 of the roller leveler unit 11 is arranged.
Can move back and forth horizontally. In addition, 13 is a gas seal, 14 is a squeeze roll, and 15 is a dryer.

Next, the operation of the vertical continuous heat treatment furnace will be described. First, in order to perform solution treatment on an aluminum strip, hot air from the heating means 4 is blown onto the strip W in the vertical heating zone 1 to obtain a solution treatment temperature (450 ° C to 600 ° C).
Then, the strip W is kept at the solution temperature for a predetermined time by the hot air from the heating means 7 in the vertical treatment zone 5,
Then, it is immersed in water in the cooling water tank 10 to cool it with water (see the solid line in FIG. 2).

Next, in order to anneal the aluminum strip, the vertical heating zone 1 blows hot air from the heating means 4 onto the strip W and heats it to the annealing temperature (450 to 600 ° C.), and the vertical zone 5 is treated. After adjusting the heating means 7 and the cooling means 8 to blow cold air of 60 to 300 ° C. onto the strip W to gradually cool it, the strip W is immersed in water in the cooling water tank 10 for water cooling (see the broken line in FIG. 2).

Incidentally, in order to perform solution treatment or annealing treatment on the copper alloy strip, as with the aluminum strip,
The heating means 7 of the vertical heating zone 1 and the heating means 7 and cooling means 8 of the vertical processing zone 5 may be adjusted so as to obtain the heat curve shown in FIG.

In any of the above-mentioned embodiments, the strip W that has exited the vertical processing zone 5 is the roller leveler unit 1
Water is cooled while the deformation is corrected by the first roller 12.
Moreover, the restraint is performed at a material temperature optimum for flattening by adjusting the horizontal position (pushing amount) of the roller 12 and the vertical position of the roller leveler unit 11.

[0011]

As is apparent from the above description, according to the present invention, since the vertical heating zone having the heating means and the cooling means is connected to the vertical heating zone, the vertical type treatment zone is connected. By appropriately switching the heating means and the cooling means of the strip, the vertical treatment zone can be made to function as a soaking zone, a slow cooling zone or a rapid cooling zone, and various heat patterns can be secured in one vertical heat treatment furnace. Therefore, since various heat treatments can be performed on the non-ferrous strip in one vertical heat treatment furnace, the facility cost is lower than the conventional one, the operating rate can be increased, and the running cost can be reduced. In addition, a roller leveler is installed in the communication part provided between the vertical processing zone and the cooling water tank, and this roller leveler can be moved up and down.By adjusting the position of the roller leveler, the strip can be flattened at the optimum temperature. It is possible to secure a good shape.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a vertical continuous heat treatment furnace for non-ferrous strips according to the present invention.

FIG. 2 is a heat pattern in solution treatment and annealing treatment of aluminum strip.

FIG. 3 is a heat pattern in solution treatment and annealing treatment of a copper alloy strip.

[Explanation of symbols]

1 ... Vertical heating zone, 2, 6 ... Nozzle header, 4, 7 ... Heating means, 5 ... Vertical processing zone, 8 ... Cooling means, 9 ... Communication part, 1
0 ... Cooling water tank, 11 ... Roller leveler unit.

Claims (1)

[Scope of utility model registration request] 1. A vertical heating zone is provided with a vertical processing zone provided with a heating means and a cooling means, and a cooling water tank is disposed below the vertical processing zone via a communication part. A vertical continuous heat treatment furnace for non-ferrous strips, comprising a roller leveler capable of moving up and down in the communicating portion.