JPH06122035A - Forging equipment - Google Patents

Abstract

PURPOSE:To provide a forging equipment wherein a work can be forged under a state that the temperature of the work at the time of forging is kept at a prescribed temperature, and the forged products need not be posttreated in the forging equipment used when a large part is forged. CONSTITUTION:This equipment is provided with a heating furnace 2 introducing, heating a heated work 19 and keeping it warm and a forging die 1 to forge the work 19 taken out of the heating furnace 2 and the heating furnace 2 consists of the heating furnace body 10 storing the work 19 and plural heaters 11 which are installed in the inner part of the heating furnace body 10 and arranged freely attachably and detachably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forging device suitable for use in the production of large forged products.

[0002]

Generally, large parts such as high strength titanium alloys used as parts for aircraft are manufactured by a forging method, especially a constant temperature forging method. In this case, forging is conventionally performed as follows. It is being appreciated. That is, in this method, after heating a material (work) to about 500 to 750 ° C. in a heating furnace, the material is taken out from the heating furnace with a fork and heated to the same temperature as the material to obtain an upper die and a lower die. Then, the upper mold is pressed from above and molded into a predetermined shape. in this case,
Since the material is long, it is impossible to perform forging at once. Therefore, so-called partial forging is performed in which the forging is gradually performed from the tip portion of the material in several steps.
When performing partial forging, even if the material is heated to a predetermined temperature, the part with a slow forging sequence will cool before forging,
It is necessary to prevent this temperature drop. Therefore, in order to keep the material heated to a predetermined temperature in the heating furnace, the entire material after heating is covered with a heat insulating material such as ceramic fiber or a canning material such as stainless steel, Forging with material.

[0003]

However, when forging is performed with the entire material covered with a covering material such as a heat insulating material as described above, the covering material is stuck to the surface of the forged forged product. However, a post-treatment process for removing this covering material is required, and the work is troublesome. In addition, there is a problem in that the heat retention by the covering material is difficult, and the dimensional accuracy of the forged product is poor because the covering material is interposed between the die and the raw material. Further, since the high-strength titanium alloy is a material that is easily affected by heat history, there is a problem that the characteristics of the forged product become non-uniform. As described above, conventionally, when forging a large-sized component, there are various problems described above,
The fact is that a forging device that effectively and appropriately solves these problems has not been provided. The present invention has been made in view of the above circumstances, in a forging device used when performing forging of large parts, it is possible to forge while maintaining the temperature of the material during forging at a predetermined temperature. ,
An object of the present invention is to provide a forging device that does not require post-processing of a forged product.

[0004]

A forging device according to claim 1 for solving the above-mentioned problems is a heating furnace for introducing a heated work and heating the work to keep it warm, and withdrawing from the heating furnace. And a forging die for forging the work, wherein the heating furnace includes a heating furnace main body for accommodating the work, and a plurality of heating heaters arranged in the heating furnace main body so as to be attachable / detachable. I have it. A forging device according to a second aspect is the forging device according to the first aspect, wherein the plurality of heaters are arranged in a line in a supply direction of the work.

[0005]

In the forging apparatus according to the first aspect of the present invention, a heating furnace for heating and heating the heated work is provided, and the work is kept at a temperature suitable for forging until just before forging with a forging die. A plurality of heaters arranged inside the heating furnace body can be attached and detached freely, and the temperature inside the heating furnace body can be adjusted according to the size and shape of the work. A forging device according to a second aspect is the forging device according to the first aspect, in which a plurality of heaters are arranged in a line in a supply direction of the work. Therefore, when selecting the number of heaters, etc.,
A temperature gradient is applied to the work, and the whole work is uniformly maintained at an appropriate temperature.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are views showing a forging device to which the present invention is applied. In these drawings, reference numeral 1 is a forging die, and reference numeral 2 is a heating furnace. Explaining the forging die 1,
As shown in FIG. 1, a lower mold base 5 is fixed on a press table 4 installed on a floor surface 3, and a lower mold 6 is attached to the lower mold base 5. Above the lower mold 6,
An upper mold base 8 to which the upper mold 7 is attached is located, and these upper mold 7 and upper mold base 8 are adapted to be pressed and raised by a drive source (not shown).

On the other hand, as shown in FIG. 1, the heating furnace 2 is arranged adjacent to the forging die 1 and is supported on a support column 9 standing on the floor surface 3 and the press table 4. The heating furnace main body 10 and the plurality of heaters 11 arranged inside the heating furnace main body 10 are the main constituent elements. As shown in FIG. 2, the heating furnace body 10 includes upper and lower wall portions 12, 1
3 and side wall portions 14 and 15 are generally configured, and each of these wall portions 12, 13, 14, and 15 is formed of a refractory material. The front end portion 1 of the heating furnace body 10 shown in FIG.
6 and a rear end portion 17 are provided with a work introduction door and a work withdrawal door (not shown).
A work mounting table 18 is disposed inside the heating furnace body 10, and a work 19 introduced from a work introducing door is mounted on the mounting table 18 as shown in the figure. There is. As shown in FIGS. 2 and 3, a heat insulating material 20 is attached to the inner surfaces of the side wall portions 14 and 15 of the heating furnace body 10, and further, the heat insulating material 20 of the upper wall portion 12 and the lower wall portion 13 is attached. Insert multiple heaters 11 at the inner position.
A plurality of holes 21 and 22 to be removed are arranged in a line in the direction in which the work 19 is fed. In addition, on the lower surface of the lower wall portion 13,
The walls 23 and 24 are fixed so as to close the hole 22.
A sealing member (not shown) is arranged on the upper surface of the upper wall portion 12 to close the hole 21 into which the heater 11 is not inserted.

The heater 11 arranged inside the heating furnace body 10 is formed in a rod shape as shown in FIG. Each heater 11 has a hole 2 in the upper wall 12.
1, the lower end of the heater 11 is inserted into the lower wall 13
The heating portion is inserted and arranged in the hole 22 of the heating furnace and is arranged inside the heating furnace body 10. In this way, these heaters 11 are arranged in a row in the heating furnace main body in the direction of feeding the work. Each heater 1
1 is heated by being supplied with electric power from an electric power supply source (not shown) as necessary.

Next, a description will be given of a procedure for forging a large part of a high-strength titanium alloy for an aircraft, for example, using the above forging device. As the forging method in this case, a constant temperature forging method is applied, and since the work is large, partial forging is performed for each forging section divided into a plurality of parts in the direction of feeding the work to the forging die 1. Is done.
First, the work 19 to be forged is heated to a predetermined temperature by another heating furnace (not shown), introduced into the inside of the heating furnace body 10 from the work introduction door of the heating furnace 2, and placed on the mounting table 18. The upper die 7 and the lower die 6 of the forging die 1 are heated to the same temperature as the work 19. Work 19
Prior to the introduction into the heating furnace body 10, the heating furnace body 10 is appropriately selected by appropriately selecting the number and installation positions of the heaters 11 arranged in the heating furnace body 10 according to the size and shape of the workpiece 19 to be forged. Adjust the internal temperature appropriately. Further, even when it is necessary to give a temperature gradient to the work 19 itself, the temperature gradient is formed inside the heating furnace main body 10 by appropriately selecting the number and installation positions of the heaters 11. In this way, the work 19 is introduced into the heating furnace body 10 and kept at an appropriate temperature for forging. Next, the work 1 inside the heating furnace main body 10
9 is pulled out from the tip by one forging section and fed to and positioned on the lower die 6, and the upper die 7 and the upper die base 8 are pressed and forged. Then, the next forging section of the work 19 is pulled out from the inside of the heating furnace main body 10 and forged in the same manner. In this way, by forging all the forging sections of the work 19 for each forging section, the forging of the work 19 is completed.

When the work piece 19 is forged by using this forging device, the heated work piece 19 is kept warm while being heated in the heating furnace 2, and one forging section of the work piece 19 is drawn out to forge die. 1 can be forged, so work 1
9 can be forged at an appropriate temperature without lowering the temperature. Also,
A plurality of heaters 11 are arranged in the side walls 14 and 15 of the heating furnace main body in the direction of feeding the work 19 via a heat insulating material 20, and these heaters 11 have holes 21 and 22.
Since it can be attached and detached through the heater, the temperature inside the heating furnace main body 10 can be easily adjusted by appropriately selecting the number of heaters 11 and the installation position, and when it is necessary to give a temperature gradient to the work. Can easily form a temperature gradient. Therefore, a forged product having uniform characteristics and high dimensional accuracy can be easily manufactured without requiring post-treatment as in the conventional case.

[0011]

In the forging device according to the first aspect of the present invention, a heating furnace for heating and heating the heated work is provided, and a plurality of heating heaters are arranged inside the heating furnace body so that they can be attached and detached. ing. When a forged product is manufactured using this forging device, it is possible to forge the work by keeping it at an appropriate temperature in a heating furnace without coating the work with a covering material such as a heat insulating material, so post-processing after forging is necessary. Since the number of heating heaters and the like can be appropriately selected according to the size and shape of the work and the temperature of the work can be appropriately maintained, a forged product having uniform characteristics and high dimensional accuracy can be obtained. A forging device according to a second aspect is the forging device according to the first aspect, in which a plurality of heaters are arranged in a line in a supply direction of the work. When a forged product is manufactured using this forging device, it is possible to forge a long work piece as a whole at an appropriate temperature, and if necessary, form a temperature gradient in the work piece and forge it. A forged product that is uniform and has high dimensional accuracy can be obtained.

[Brief description of drawings]

FIG. 1 is a side view of a forging device shown as an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the main parts of the device.

FIG. 3 is a partial cross-sectional perspective view of the device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Forging die 2 Heating furnace 10 Heating furnace main body 11 Heating heaters 21 and 22 holes

Claims (2)

[Claims] 1. A heating furnace for introducing a heated work and keeping it warm while heating the work, and a forging die for forging the work drawn out from the heating furnace. A forging device comprising: a heating furnace main body for accommodating the above; and a plurality of heating heaters that are detachably mounted inside the heating furnace main body. 2. The forging device according to claim 1, wherein the plurality of heaters are arranged in a line in a supply direction of the work.