KR100412417B1 - Aluminum Continuous Extrusion and Hot Mill Unification Process To Produce Aluminum Plate For Fine Parts - Google Patents

Abstract

The present invention relates to an aluminum continuous extrusion-hot rolling integrated process and apparatus.

Aluminum continuous extrusion-hot rolling integrated process and apparatus for the production of aluminum plate for precision parts according to an embodiment of the present invention is a process for producing an aluminum plate by continuously extruding aluminum billets by continuously supplying a plurality of aluminum billet to the extruder and And supplying the aluminum plate to the bit member deeply dug to a predetermined depth, and supplying the aluminum plate from the bit member to a hot rolling mill to hot roll the aluminum plate once to produce an aluminum roll.

The aluminum continuous extrusion-hot rolling integrated process and apparatus according to the present invention do not require the surface processing process of the aluminum coil having the same mechanical properties and performance as that of the aluminum coil produced by the direct chill method, and the hot rolling process and the hot end are terminated in one time. Since the rolling process can be produced in a simple process that does not require an annealing process, the energy investment cost and equipment investment cost for producing a unit aluminum coil by the simple process are much lower than those of the direct chill method, thereby reducing manufacturing costs. .

Description

Aluminum Continuous Extrusion and Hot Mill Unification Process To Produce Aluminum Plate For Fine Parts}

FIELD OF THE INVENTION The present invention relates to extrusion and rolling processes and apparatus, and more particularly to an aluminum continuous extrusion-hot rolling integrated process and apparatus.

In general, an aluminum coil is manufactured by a continuous casting method, a direct chilled method, or the like.

In the continuous casting method, an aluminum plate is cast to a thickness of about 9 to 10 tons or an aluminum roll is formed to a diameter of about 1000 to about 1100, and then cold rolling is performed 3 to 4 times, followed by annealing. After sequentially performing, to produce an aluminum coil having a thickness of about 0.3t ~ 0.5T. The aluminum coil produced by the continuous casting method is used for building exterior materials and vehicle exterior materials, but the mechanical properties and performances of aluminum materials, such as elongation, tensile strength, and orange peel, Defect), resistance, and the like can satisfy only the 60 to 70% level. In addition, the aluminum oxide film is formed on the surface of the aluminum coil produced by the continuous casting method has a disadvantage of poor workability.

The direct chill method first casts aluminum slab having a thickness of about 400 tons, and then processes the slab surface to remove surface defects, preheating process of 400 to 450 ° C., hot rolling (more than 6 times, 1). 50% reduction, final thickness 8t), annealing, cold rolling, and annealing are sequentially performed, and finally, an aluminum coil having a thickness of about 0.3 to 0.5t is produced. The aluminum coil produced by the direct chill method satisfies 90 to 99% of the mechanical properties and performance of the aluminum material. However, the direct chilled method has a number of hot rolling times and a high number of processes, a relatively long casting time, an excessive manufacturing cost, and a large capital investment. In addition, the direct chill method has a problem that work hardening occurs because the temperature of the aluminum material after the hot rolling is less than 200 ℃. For this purpose, the direct chill method requires an annealing process before cold rolling.

Accordingly, it is an object of the present invention to provide an aluminum continuous extrusion-hot rolling integrated process and apparatus which makes the process simple and lowers the manufacturing cost.

1 shows an aluminum continuous extrusion-hot rolling integrated device according to the invention.

<Description of Symbols for Main Parts of Drawings>

1: hydraulic extruder 2: bit

3: hot presser 4: cutting machine

5: rewinder

In order to achieve the above object, the aluminum continuous extrusion-hot rolling integrated apparatus for producing aluminum plate for precision parts according to an embodiment of the present invention, by supplying a plurality of aluminum billet continuously to the extruder to continuously extrude the aluminum billet aluminum plate A process of producing an aluminum plate, a step of supplying an aluminum plate to a bit member deeply drilled to a predetermined depth, and a process of supplying an aluminum plate from the bit member to a hot rolling mill to hot roll the aluminum plate once to produce an aluminum roll. The aluminum continuous extrusion-hot rolling integrated process for producing aluminum plate for precision parts according to an embodiment of the present invention is a plurality of aluminum billets are continuously supplied and extruder for continuously extruded aluminum billets to produce an aluminum plate , The bit member the aluminum plate is supplied from the extruder, and once the hot rolling with respect to the aluminum plate to be supplied from the bit member and a hot rolling mill for producing aluminum roll.

Other objects and features of the present invention in addition to the above object will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, a preferred embodiment of the present invention will be described with reference to FIG. 1.

1, the aluminum continuous extrusion-hot rolling integrated apparatus according to the present invention is a hydraulic extruder (1), a bit (2), a hot rolling mill (3), a cutting machine (4) arranged in an in-line form And a rewinder 5. The hydraulic extruder 1 is continuously supplied with two or more aluminum billets. Here, the aluminum billet is cast and preheated (400 to 450 ° C.) and supplied to the hydraulic extruder 1 as a billet having a diameter of 250 mm and 775 mm. The aluminum billet thus supplied is continuously extruded by the hydraulic extruder 1 to form an aluminum plate having a thickness of about 8 to 10 tons. Here, in the case of the conventional direct chill method, when the size of slab is determined, the outer diameter of the final coil is limited accordingly, whereas a mold structure for joining each billet is developed, and thus the mold structure is used. The outer diameter of the extrusion plate roll produced after hot rolling can be freely adjusted. When joining the aluminum bitlets supplied to the hydraulic extruder 1, a surface chamfering process of a newly introduced billet is preceded to prevent foreign matter from mixing and to remove the aluminum oxide layer. The extrusion outlet temperature of the hydraulic extruder 1 is 480 ~ 500 ℃ it is possible to continuous hot work without additional heating.

The aluminum plate discharged from the hydraulic extruder 1 is supplied to the hot rolling mill 3 via the bit 2 of a predetermined depth. The bit 2 serves to prevent the stop of the hot rolling mill 3 at the time of billet exchange by maintaining the aluminum plate supplied to the hot rolling mill 3 at all times. For this purpose, the extrusion speed of the hydraulic extruder 1 is adjusted faster than the hot rolling input speed. According to the conventional method without the bit 2, when the equipment is stopped during the hot rolling progression, a defect, for example, a change in the thickness of the aluminum plate, occurs in the aluminum plate portion corresponding to the stop portion. The hot rolling mill 3 hot-rolls the 8-10 t aluminum plate supplied via the bit 2 once, and discharges the aluminum roll which has a thickness of about 4-5 t. The rewinder 5 serves to wind the aluminum roll supplied from the hot rolling mill. When the aluminum roll of a predetermined length is wound by the rewinder 5, the aluminum roll discharged from the hot rolling mill 3 is cut by the cutting machine 4. Rewinder (5) is equipped with a torque limiter (torque limiter) to prevent the change of the plate thickness due to the instantaneous pulling shape during the rewinding operation of the aluminum roll.

Subsequently, a cold rolling process and an annealing process are performed on the aluminum roll wound on the rewinder 5 using a cold rolling apparatus (not shown). The aluminum coil produced after the annealing process has a thickness of about 0.3 to 0.5t. Here, since the work hardening of the aluminum coil does not occur after hot rolling, the annealing process performed before the conventional cold rolling is unnecessary. The aluminum coil thus produced maintains the same mechanical properties and performance as those produced by the direct chill method.

The aluminum continuous extrusion-hot rolling integrated process using the aluminum continuous extrusion-hot rolling integrated apparatus shown in FIG. 1 is performed by the aluminum billet casting process → preheating process (400-500 ° C.) → continuous extrusion process (8-10 t) as described above. → hot rolling once (4 ~ 5t) → cold rolling → annealing to produce 0.3 ~ 0.5t of aluminum coil.

As described above, the aluminum continuous extrusion-hot rolling integrated process and apparatus according to the present invention eliminates the need for a surface machining process of an aluminum coil having the same mechanical properties and performance as that of the aluminum coil produced by the direct chill method and is terminated in one time. It can be produced in a simple process that does not require the unrolling process after the hot rolling process and the hot rolling process, and the energy investment cost and facility investment cost for producing a coil of 1 kg by the simple process are much lower than that of the direct chilled method. You can save.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (6)

Continuously feeding a plurality of aluminum billets to an extruder to produce an aluminum plate by continuously extruding the aluminum billets; Supplying the aluminum plate to a bit member deeply drilled to a predetermined depth; Supplying the aluminum plate from the bit member to a hot rolling mill to hot roll the aluminum plate once to produce an aluminum roll, the aluminum continuous extrusion-hot rolling for producing aluminum plate for precision parts Integral process. The method of claim 1, Casting and preheating the aluminum bladder prior to extruding the aluminum bitlet; And annealing the cold rolled aluminum coil. The aluminum continuous extrusion-hot rolling integrated process for producing an aluminum plate for precision parts. The method of claim 1, The extrusion exit temperature of the extruder is maintained at 480 ~ 500 ℃ aluminum continuous extrusion-hot rolling integrated process for producing aluminum plate for precision parts. An extruder that supplies a plurality of aluminum billets continuously and continuously extrudes the aluminum billets to produce an aluminum plate, A bit member to which the aluminum plate is supplied from the extruder; An aluminum continuous extrusion-hot rolling integrated apparatus for producing aluminum plate for precision parts, characterized in that it comprises a hot rolling mill for producing an aluminum roll by hot rolling once against the aluminum plate supplied from the bit member. The method of claim 4, wherein And a cold rolling mill for cold rolling the aluminum roll, wherein the aluminum continuous extrusion-hot rolling integrated apparatus for producing an aluminum plate for precision parts is further provided. The method of claim 4, wherein Further provided with a rewinder for winding the hot rolled aluminum roll, The rewinder is an aluminum continuous extrusion-hot rolling integrated apparatus for producing aluminum plate for precision parts, characterized in that the torque limiter is mounted to reduce the instantaneous pulling when winding the aluminum roll.