KR100465406B1 - Method of taper heating in the billet gas heater for pressure and system for performing the same - Google Patents

Abstract

Taper heating in the billet gas heating furnace for reducing equipment investment cost and extruded billet isothermally so that the uniformity and reliability of the extruded product can be satisfied to meet the consumer's purchasing needs. An apparatus is disclosed. Taper heating apparatus according to the present invention is one end is connected to the heating furnace is formed with a discharge port and the other end is connected to the door opening and closing guide while the upper portion is formed in the exhaust port communicating with the outside; A blower fixedly disposed on the lower surface of the housing, one end of which is connected to the blower and the other end of which extends through the housing, and has a control lever mounted thereon, and an annular ring shape and connected to the blower pipe to one side of the outlet; A blower having an air tunnel duct disposed therein and having a plurality of ejection holes formed therein for injecting a fluid guided by the blowing pipe on the inner circumferential surface; And a plurality of injections having an annular ring shape surrounding the discharge port on the outer circumferential surface of the discharge port and connected to a conventional compressor and spraying compressed air guided by the compressor on the inner circumferential surface to prevent the fluid ejected from the air tunnel duct from flowing into the discharge side. It consists of an air curtain part which has a damper with a ball formed.

Description

Tapered heating apparatus and taper heating method for billet gas heating furnace for extrusion {Method of taper heating in the billet gas heater for pressure and system for performing the same}

The present invention relates to a taper heating apparatus, and more particularly, a song having an air tunnel duct cooling a billet disposed between an outlet of an extruded billet gas heating furnace and a door opening and closing guide equipped with a door. By providing abundance and an air curtain to prevent the air discharged from the air tunnel duct into the outlet of the heating furnace, it is possible to reduce the capital investment cost and to uniformly extrude the discharged billet to isothermal temperature so that the uniformity of the extruded product The present invention relates to a taper heating apparatus and a taper heating method in an extruded billet gas heating furnace capable of satisfying consumer's purchase desires by improving performance and reliability.

In general, isothermal extrusion of billets has evolved according to the relationship between outlet temperature, ram speed and billet temperature. One way to achieve isothermal extrusion is to reduce the extrusion rate during extrusion. At this time, the reduction of the extrusion speed is determined by the measurement of the exit temperature, and the measurement of the exit temperature is continuously required, and the extrusion speed according to the exit temperature is determined by a pre-programmed program, and the current press ram travel distance is the speed control program of the extruder. It is possible to divide step by step of various lengths.

In addition, another method of isothermal extrusion is a method of heating the rear of the billet at a low temperature and a proper temperature gradient. This method is known as taper heating. This taper heating is possible in induction heaters with appropriate coils or in billet gas furnaces using special billet heaters that heat more in front of the back. Another method is to cool the back of the billet by water spray when the billet is transferred from the heating furnace to the container after uniform heating.

However, when using an induction heater, taper heating and precise temperature control are possible, and the heating time is fast, but there is a temperature difference between the surface of the billet and the internal temperature, and the energy cost and equipment investment cost are billet gas. There is a problem that is expensive compared to the heating furnace. In addition, if the billet gas heating furnace is used, the energy cost and equipment investment cost are low, and the uniform temperature of the billet can be obtained, but the heating time is long due to the induction heater and the effect of taper heating is low. There was a problem.

The present invention has been made to solve the conventional problems as described above, an object of the present invention is to cool the billet discharged disposed between the discharge port of the billet gas heating furnace for extrusion and the door opening and closing guide equipped with the door By having a blower having an air tunnel duct and an air curtain to prevent the air discharged from the air tunnel duct into the outlet of the heating furnace, it is possible to reduce the capital investment cost and to extrude the discharged billet isothermally The present invention provides a taper heating apparatus and a taper heating method in a billet gas heating furnace for extrusion, which can improve the uniformity and reliability of a product to be extruded, thereby satisfying a consumer's purchase desire.

1 is a schematic front view of an extruded billet gas heating furnace equipped with a taper heating apparatus according to the present invention, and

FIG. 2 is a perspective view illustrating the inside of the housing illustrated in FIG. 1.

Explanation of symbols on the main parts of the drawing

100: taper heating device 110: housing

112: exhaust port 120: blower

122: blower 124: blowing pipe

128: air tunnel doctor 130: blowout

140: air curtain portion 142: damper

144: injection hole

In order to achieve the object of the present invention as described above, the present invention,

In the tapered heating apparatus having a inlet and an outlet and a heating furnace equipped with a billet feed roller and a heating burner therein, and a door opening and closing guide, which is disposed on one side of the outlet and the door is transportable,

Taper heating apparatus;

A housing, one end of which is connected to a heating furnace in which an outlet is formed, and the other end of which is connected to a door opening and closing guide, and a housing having an exhaust port communicating with the outside at an upper portion thereof;

A blower fixedly disposed on the lower surface of the housing, one end of which is connected to the blower and the other end of which extends through the housing, and has a control lever mounted thereon, and an annular ring shape and connected to the blower pipe to one side of the outlet; A blower having an air tunnel duct disposed therein and having a plurality of ejection holes formed therein for injecting a fluid guided by the blowing pipe on the inner circumferential surface; And

On the outer circumferential surface of the discharge port, a plurality of injection holes are connected to a conventional compressor and have a plurality of injection holes that prevent the fluid ejected from the air tunnel duct from flowing into the discharge port by injecting compressed air guided by the compressor on the inner circumferential surface. Provided is a taper heating apparatus in an extrusion billet gas heating furnace comprising an air curtain portion having a damper formed thereon.

In addition, the present invention provides a taper heating method in a billet gas heating furnace for extrusion to cool the billet discharged from a conventional heating furnace to a taper temperature range of 50 ~ 100 ℃ by compressed air of 100 ~ 300mmAQ pressure. .

As described above, according to the present invention, a blower having an outlet for the extrusion billet gas heating furnace, and an air tunnel doctor for cooling the discharged billet disposed between the door opening and closing guide equipped with the door, By providing the air curtain part to prevent the air discharged from the air tunnel duct into the outlet of the heating furnace, it is possible to reduce the capital investment cost and to extrude the discharged billet isothermally so that the uniformity and reliability of the extruded product It can be improved to meet the consumer's purchasing needs.

Hereinafter, a taper heating apparatus and a taper heating method in a billet gas heating furnace for extrusion according to an embodiment of the present invention with reference to the accompanying drawings.

FIG. 1 is a front view schematically showing an extruded billet gas heating furnace equipped with a taper heating apparatus according to the present invention, and FIG. 2 is a perspective view showing the inside of the housing shown in FIG. 1.

1 and 2, the tapered heating apparatus 100 according to the present invention has an inlet 12 and outlet 14 while the inside is equipped with a billet feed roller 16 and a heating burner 18 It is disposed between the furnace 10 and the door opening and closing guide 20 in which the door 22 is transportably mounted while being disposed on one side of the outlet 14, and on one side of the door opening and closing guide 20, the billet pull-out driving motor. A billet take-out roller 32 actuated by 30 is arranged.

The taper heating apparatus 100 includes a housing 110, a blower 120, and an air curtain 140. One end and the other end of the housing 110 is open and one end is connected to the heating furnace 10 in which the outlet 14 is formed, and the other end is connected to the door opening and closing guide 20. In this case, an exhaust port 112 communicating with the outside is formed at an upper portion of the housing 110. The blower 120 and the air curtain 140 are formed in the housing 110 formed as described above.

The blower 120 includes a blower 122 and an air tunnel duct 128. The blower 122 is fixedly disposed on the lower surface of the housing 110. The blower 122 has a blow pipe 124 having one end connected to the blower 122 and the other end extending through the housing 110. At this time, the control pipe 126 is mounted to the blowing pipe 124. Preferably, the blower 122 pumps a fluid of any one of air, water, mist or cooling oil. The air tunnel duct 128 has an annular ring shape and is connected to the blowing pipe 124 and disposed at one side of the outlet 14. The inner circumferential surface of the air tunnel duct 128 has a diameter that can smoothly pass through the billet B discharged from the discharge port 14, and a plurality of jets capable of injecting the fluid guided by the blowing pipe 124 on the inner circumferential surface thereof. The ball 130 is drilled.

On the other hand, the air curtain 140 is provided with a damper 142 having an annular ring shape surrounding the outlet 14 on the outer peripheral surface of the outlet (14). This damper 142 is connected to a conventional compressor (not shown). At this time. On the inner circumferential surface of the damper 142, a plurality of injection holes 144 capable of injecting compressed air are formed.

The tapered heating device 100 formed as described above is forcibly cooled by using the fluid injected from the air tunnel duct 128 to the front of the billet (B) discharged from the outlet 14, the front and rear of the billet (B) While maintaining the proper temperature difference of the guide to the turning device (not shown) disposed outside the door opening and closing guide 20, the turning device is guided to the extrusion step by turning the guide billet (B). At this time, the billet (B) guided to the extrusion step is formed an appropriate temperature gradient. Meanwhile, the damper 142 of the air curtain unit 140 prevents the fluid injected from the air tunnel duct 128 from being introduced into the heating furnace 10 through the outlet 14.

The heating method using the tapered heating apparatus 100 in the extrusion billet gas heating furnace formed as described above will be described.

The billet (B) discharged through the outlet 14 in the heating furnace 10 is cooled by compressed air having a pressure of 100 ~ 300mmAQ for 1 to 3 minutes to the taper temperature range of 50 ~ 100 ℃ after turning apparatus Rotate 180 ° by using one side of the billet (B) having a high temperature to the extruder side. At this time, when the compressed air pressure is 100mmAQ or less, the cooling effect is reduced, and when the compressed air pressure is 300mmAQ or more, there is a problem of overcooling. In addition, if the taper temperature is less than or exceeds the range of 50 ~ 100 ℃ isothermal extrusion is not possible.

As described above, the tapered heating apparatus 100 according to the present invention is connected to the blower 122 and the air tunnel duct 128 and the air tunnel duct 128 to cool the billet (B) discharged from the outlet 14 By having a damper 142 for ejecting compressed air to prevent the fluid injected from the inside of the heating furnace 10 is introduced into the heating furnace 10, it is possible to exhibit isothermal extrusion at a low capital investment cost, and to extend the life of the mold Not only can this be done, it also has the advantage of improving the quality of the product.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims You will understand.

Claims (5)

In the tapered heating apparatus having a inlet and an outlet, the inside of the heating furnace is equipped with a billet feed roller and a heating burner, and the door opening and closing guide is disposed on one side of the outlet port so that the door is transportable, The taper heating device; A housing having one end connected to the heating furnace in which the discharge port is formed and the other end connected to the door opening and closing guide and having an exhaust port communicating with the outside at an upper portion thereof; A blower fixedly disposed on the lower surface of the housing, one end of which is connected to the blower and the other end of which extends through the housing, and a blowing pipe having a control lever mounted thereon, and having an annular ring shape and being connected to the blowing pipe. An air blowing unit disposed at one side of the outlet and having an air tunnel duct perforated with a plurality of ejection holes for injecting a fluid guided by the blowing pipe on an inner circumferential surface thereof; And It has an annular ring shape surrounding the outlet port on the outer circumferential surface of the outlet port and is connected to a conventional compressor and sprays compressed air guided by the compressor on the inner circumferential surface to prevent the fluid ejected from the air tunnel duct from flowing into the outlet side. Taper heating apparatus in the billet gas heating furnace for extrusion, characterized in that the air curtain having a damper formed with a plurality of injection holes. The taper heating apparatus of claim 1, wherein the fluid is any one of air, water, mist, and cooling oil. In the tapered heating method of the billet for extrusion using the tapered heating device of claim 1, A taper heating method in a billet gas heating furnace for extrusion, characterized in that the billet discharged from a conventional heating furnace is cooled to a taper temperature range of 50 to 100 ° C. by compressed air having a pressure of 100 to 300 mmAQ. 4. The method of claim 3, wherein the cooling is performed for 1 to 3 minutes. The tapered heating method of claim 3 or 4, wherein the cooled billet is rotated 180 degrees by a turning device so that one side having a high temperature is charged to the extruder side.