JPH08269651A - Heat treatment method and extrusion equipment for metal extruded material - Google Patents

Abstract

(57) [Summary] [Structure] An aluminum extruded material E which is extruded from the extruder 1 and is still in a high temperature state by retaining the heat of extrusion processing is heated to a predetermined quenching temperature. Cool and quench. [Effect] The extruded material 1 can be quenched with good quality stability, heat energy advantage, and efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment method such as quenching of an extruded material made of metal such as aluminum, and an extrusion equipment.

[0002]

2. Description of the Related Art For example, as quenching methods for aluminum extruded materials, a die quench method and an off-line method have been conventionally known.

The die quench method is a method of forcibly cooling the extruded material which is still in a high temperature state and is extruded from the extruder by water cooling or the like. In this die quench method, the processing heat at the time of extrusion is used as it is for the heat for quenching. Therefore, the heat energy can be effectively used, and the heating time for quenching can be eliminated to make the quenching efficient. It has advantages such as good performance.

On the other hand, in the off-line method, the extruded extruded material is heated from room temperature to a predetermined quenching temperature in a heat treatment line different from the extrusion processing line, and then forcedly cooled.

[0005]

However, although the die-quenching method is advantageous in terms of heat energy and efficiency as described above, it has a problem of lacking stability in terms of quality. That is, in extrusion, in the first half and the second half of extrusion, the temperature of the material tends to be higher in the latter half than in the first half due to deformation resistance heat and frictional heat of the extruded material.
There is a difference in the quenching temperature between the leading end side and the trailing end side of the obtained extruded material, which makes it difficult for the extruded material to be quenched to a constant quality in the length direction.

On the other hand, in the off-line method, quenching is performed by a special line for heat treatment, which is provided separately from the extrusion line, so that the extruded material can be quenched to a certain quality in the length direction. Although there is no drawback of the die quench method, however, on the other hand, since it heats the extruded material at room temperature to the quenching temperature, it requires a lot of heat energy for quenching and there is a problem that it is inferior in efficiency. .

In view of the above-mentioned conventional problems, the present invention is capable of heat-treating an extruded material with good quality stability and, in addition, is heat energy-efficiently and efficiently heat-treated. It is an object of the present invention to provide a heat treatment method for metal extruded material and extrusion equipment capable of performing the same.

[0008]

The above object is to heat a metal extruded material extruded from an extruder and still retain the heat of extrusion processing to a predetermined heat treatment temperature, and then cool the extruded material. And a heat treatment method for a metal extruded material.

In this heat treatment method, the cooling is further performed.
It is advisable to chuck both ends of the extruded material with a pre-stretcher in the equipment after the extrusion.

The above object is also achieved by a metal extruding equipment for extruding metal, characterized in that a heating device for heat treatment is provided along an extruding path of the extruding material of the equipment for post-extrusion.

In this extrusion equipment, it is preferable that a pre-stretching table of the equipment for the rear surface of the extrusion is provided with a forced cooling device for heat treatment.

[0012]

In the above heat treatment method, since the extruded material is separately heated to the predetermined heat treatment temperature, the extruded material is uniformly heated to the predetermined heat treatment temperature in the length direction thereof, and therefore, the quality is improved. Heat-treated with good stability.

Moreover, since the extruded material extruded from the extruder and still having the heat of extrusion processing is heated, the extruded material can be heat-treated efficiently in terms of thermal energy and efficiently.

In this heat treatment method, the extruded material is prevented from being bent or distorted by cooling the extruded material by chucking both ends thereof. In addition, since the pre-stretcher of the equipment on the rear surface of the extrusion is used for the chucks at both ends, the extruded material can be chucked advantageously in terms of equipment.

Further, in the above-mentioned extrusion equipment, since the heating device for heat treatment is arranged along the extrusion path of the extruded material of the equipment for the rear surface of extrusion, the extruded material is provided with the heating device in the longitudinal direction thereof. In, the metal extruded material which is uniformly heated to a predetermined heat treatment temperature and heat-treated with good quality stability, and which is still extruded from the extruder and still has the heat of extrusion processing can be heated. However, the heat treatment is advantageous in terms of thermal energy and is performed efficiently.

In this extrusion equipment, a forced cooling device for heat treatment is provided on the pre-stretching table of the rear equipment so that both ends of the extruded material can be chucked for forced cooling. Bending and distortion are prevented, and the chucks at both ends can be chucked by the pre-stretcher of the equipment on the rear surface of the extrusion, so that the chuck of the extruded material can be carried out advantageously in terms of equipment.

[0017]

EXAMPLES Next, examples in which the present invention is applied to the quenching of an aluminum extruded material will be described. Needless to say, the present invention is not limited to the case of quenching and can be applied to various heat treatments such as tempering.

FIG. 1 shows an extrusion equipment according to an embodiment. In the extrusion equipment, (1) is an extruder and (2) is a rear equipment. In the extruder (1), (3) is an extrusion die, (4) is a container, and (5) is an end platen. Also, in the rear equipment (2), (6) is an initial table, (7) is a run-out table, (9) is a puller, (10) is a pre-stretching table, and (11).
(11) is a chuck of a pre-stretcher.

In the rear equipment (2), the initial table (6) to the run-out table (7).
A heating device (13) for quenching is arranged along the extrusion path of the extruded material (E) from the extruder (1). The length of the heating device (13) is designed in consideration of the length of the extruded material (E) to be extruded so that the extruded material (E) can be heated uniformly over substantially the entire length. Preferably.

The heating device (13) is shown in FIG.
As shown in (a), a pair of heat insulating covers (15) having a semicircular arc shape in a horizontal cross section, which are arranged so as to be vertically movable between the extruded material (E) and the table roller (14) supporting the extruded material (E). )
(15) and a large number of nozzles (16) arranged as a whole in the inner peripheral portion of each heat insulating cover (15) (15) at intervals in the circumferential direction and also in the longitudinal direction, Each nozzle (16)
Hot air for quenching and heating is blown out from.

Further, as shown in FIG. 1, in the rear equipment (2), the pre-stretching table (10) is used.
A forced cooling device (19) is provided in the. It is preferable that the cooling device (19) is also designed to have a length capable of uniformly cooling the extruded material (E) over substantially the entire length thereof.

The cooling device (19) is shown in FIG.
As shown in (b), the extruded material (E) and the table roller (20) that supports the extruded material (E) are sandwiched between the pair of covers (21) having a semicircular arc shape in the inner circumference which is vertically movable. (2
1) and a large number of nozzles (22) arranged on the inner circumference of each of the covers (21) (21) at intervals in the circumferential direction and also in the longitudinal direction. The cooling medium for forced cooling is blown out from (22).
The cooling medium may be, for example, a liquid such as water or cold air. When the cooling medium is a liquid such as water, it is preferable that the liquid is blown out in the form of a shower or a mist.

Quenching of the extruded material (E) is performed as follows. That is, the extruded material (E) from the extruder (1) is extruded onto the initial table (6) and the runout table (7) while being pulled by the puller (9), and immediately after the end of the extrusion, the heat insulating cover is (15) With the nozzles (15) relatively close to each other, hot air is discharged from each nozzle (16), and the extruded material (E) is heated to a predetermined quenching temperature by the heating device (13).

Then, the extruded material (E) is the heating device (1
After being uniformly heated in the length direction in 3), the extruded material (E) is dispensed to a pre-stretching table (10), and both ends of the extruded material (E) are chucked ( 11) Chuck with (11). Of course, at this time, tension may be applied to the extruded material (E) by both chucks (11) (11). Then, while the covers (21) (21) are relatively close to each other, each nozzle (2
2) A cooling medium is discharged from ... And the extruded material (E) is forcibly cooled by this cooling device (19). By the above, quenching of the extruded material (E) extruded from the extruder (1) is completed.

As described above, according to the above embodiment, the extruded material (E) is heated to the predetermined quenching temperature by the heating device (13). In the length direction, it can be uniformly heated to a predetermined quenching temperature, and the extruded material (E) can be quenched with good quality stability.

Moreover, since this heating is performed at the position immediately after extrusion, that is, the initial table (6) and the run-out table (7), the extruded material (E) still has a very large amount of heat for extrusion processing, By heating such an extruded material (E), the extruded material (E)
Is very advantageous in terms of heat energy and efficiently,
It can be heated to the quenching temperature.

Since the cooling is performed by chucking both ends of the extruded material (E) with the chucks (11) and (11), the extruded material (E) is bent or distorted by the cooling action. It is possible to effectively prevent this, and since the chucks at both ends of the extruded material (E) are performed by the chucks (11) (11) of the pre-stretcher of the equipment on the rear surface of the extrusion, the equipment can be used universally. As a result, the extruded material (E) can be chucked in a machine-friendly manner, and at the same time, the extruded material (E) can be subjected to prestitching.

In the above embodiment, the extruded material (E) which has been extruded from the extruder is heated, but the extruded material in the process of being extruded is heated by the heating device (13). It may be started. Further, in the above embodiment, the heating device (13) is arranged from the initial table (6) to the runout table (7),
The heating device (13) is provided only on the runout table (7), and after the extrusion, the entire extruded material (E) is transferred to the runout table (7) so that the extruded material (E) is heated. May be. Further, in the above embodiment, cooling is performed by chucking both ends of the extruded material (E) with the chucks (11) (11) of the pre-stretcher, but in addition, for example, it is provided in the rear equipment. A cooling chuck may be specially provided on the cooling table, and both ends of the extruded material (E) may be chucked by the chuck for cooling. Further, in the above embodiment, the extruded material is forcibly cooled using the cooling medium, but the cooling is not limited to such forced cooling, and may be natural cooling or the like.

[0029]

As described above, the heat treatment method of the present invention is
Since the metal extruded material extruded from the extruder and still having the heat of extrusion processing is heated to a predetermined heat treatment temperature, the extruded material is uniformly heated to a predetermined heat treatment temperature in its length direction. In addition, the extruded material can be heat-treated with good thermal energy efficiency and high efficiency.

In this heat treatment method, cooling is
It is possible to prevent the extruded material from bending or distorting by chucking both ends of the extruded material with the pre-stretcher of the equipment after extrusion. The extruded material can be chucked advantageously.

Further, in the extrusion equipment of the present invention, since the heating device for heat treatment is provided along the extrusion path of the extruded material of the equipment for the rear surface of the extrusion, the extruded material is subjected to a predetermined heat treatment temperature in the longitudinal direction. It is possible to uniformly heat the metal extruded material and heat it with good quality stability. Moreover, it is possible to heat the metal extruded material that has been extruded from the extruder and still retains the heat of extrusion processing. Can be heat-treated efficiently and efficiently in terms of thermal energy.

In this extrusion equipment, a forced cooling device for heat treatment is provided on the pre-stretching table of the rear equipment so that both ends of the extruded material can be chucked for forced cooling. Bending and distortion can be prevented, and the chucks of the both ends can be chucked for the extruded material by using existing pre-stretchers in terms of equipment.

[Brief description of drawings]

FIG. 1 is a plan view showing an extrusion equipment according to an embodiment.

2 is a sectional view taken along the line II of FIG. 1, and FIG. 2B is a sectional view taken along the line II-II of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Extruder 2 ... Rear equipment 10 ... Pre-stretching table 11 ... Chuck 13 ... Heating device 19 ... Forced cooling device

Claims (4)

[Claims] 1. A metal extruded material extruded from an extruder, which still retains heat of extrusion processing, is heated to a predetermined heat treatment temperature, and then this extruded material is cooled. Heat treatment method for extruded materials. 2. The heat treatment method for a metal extruded material according to claim 1, wherein the cooling is performed by chucking both ends of the extruded material with a pre-stretcher of a post-extrusion equipment. 3. An extruding equipment for metal extruded material, characterized in that a heating device for heat treatment is provided along an extruding path of the extruded material of the post-extrusion equipment. 4. The extrusion equipment of metal extruded material according to claim 3, wherein a forced cooling device for heat treatment is provided on the pre-stretching table of the equipment for the rear surface of extrusion.