KR20240039603A - Multi step die - Google Patents

Abstract

The present invention relates to a multi-step die installed in a 4-die forging equipment for forging various steels or alloys to complete the final product by forging input materials that cannot be forged at once in stages without replacing the die.
The present invention includes an upper die with one side fastened to the upper body for forging the upper part of the input material, a lower die with one side fastened to the lower body for forging the lower part of the input material, and one side fastened to the side slide. It is formed as a side die for forging both sides of the input material, and on the upper die, the lower die, and the other side of the side die, the height gradually increases toward the center of the input material from the front to the rear, respectively. It is characterized in that it includes being formed so that more than one pressing part is connected.

Description

MULTI STEP DIE {MULTI STEP DIE}

The present invention relates to a multi-step die installed in a 4-die forging equipment for forging various steels or alloys to complete a final product by continuously step-by-step forging input materials that cannot be forged at once without replacing the die.

In general, forging is the process of completing the final product by applying heat to the input material and then pressing the input material through a forging device. When the gas contained in the material is removed by tapping while hotter than the recrystallization temperature, the crystallization occurs during recrystallization. As it becomes more dense, strength can be increased.

And for forging various steel or alloy ingots and billets, a 4-die forging device is used, and the 4-die forging device is used for rods, columns, intermediate shafts, and torsion. For the manufacture of elongated parts such as torsion bars and rolling mill rolls, as well as for the subsequent forming of forged parts of structural steels, stainless steels, high-temperature and difficult-to-machine steels and alloys. It is widely used in many fields.

The 4-die forging device is disclosed in detail in Republic of Korea Patent Publication No. 10-2209657.

According to the prior art, the 4-die forging device 10, as shown in FIG. 1, has a movable upper body 11 with inclined surfaces formed toward both ends on the lower surface, and both ends are improved on the upper surface. It is disposed between the lower body 12 and the upper body 11 and the lower body 12, which has a formed inclined surface and is fixed, and has an inclined surface corresponding to the inclined surface of the upper body 11 at the upper part, and at the lower part Two side slides (13, 14) having an inclined surface corresponding to the inclined surface of the lower body (12), the upper body (11) and the side slides (13, 14), the lower body (12) and the side It is formed of a plurality of guideways 15 that dynamically connect the slides 13 and 14 to each other.

And an upper die 21 for forging the upper part of the input material is fixed to one side of the upper body 11, and a lower die 22 for forging the lower part of the input material is fixed to one side of the lower body 12. It is fixed, and two side dies (23, 24) for forging both sides of the input material, respectively, are fixed to one side of the side slides (13, 14).

For this four-die forging machine, the dimensions of the four dies (top die, bottom die, and two side dies) determine the minimum dimensions. Therefore, if there is a large difference between the minimum dimension of the die and the dimension of the input material, or if the reduction amount is pressed excessively, there is a limit to the increase in reduction amount due to overlapping of the products due to the excessive difference in reduction amount. We operate with 2 to 3 dies of different heights (sizes), but this has the disadvantage of having to be replaced during work.

That is, in the case where the input material cannot be forged in one go because the dimensions of the input material are larger than the dimensions of the final product, the final product is completed through three forging processes of the input material, as shown in Figure 2, so it is usually Two to three dies with different heights (h1 to h3) were needed.

Referring to Figure 2, in the first forging process, the first input material is first heated through a heating furnace before forging begins, and then the heated input material is pressed into the first die to first reduce the size (cross-sectional area) of the input material. Forging is done to reduce the size.

Thereafter, in the second forging process, the input material whose cross-sectional area is first reduced is secondarily heated and pressed down with a replaced second die to perform forging in which the cross-sectional area is secondarily reduced.

Lastly, in the third forging process, the final product was completed through forging in which the cross-sectional area was reduced a third time by heating the input material whose cross-sectional area was reduced a second time and pressing it with a replaced third die.

Therefore, due to conventional die replacement, reheating of the input material was necessary, and additional maintenance time due to die replacement was problematic. Additionally, due to die replacement, safety accidents (thermal burns) of workers occur and productivity decreases.

Republic of Korea Patent Publication No. 10-2209657

The present invention is intended to solve the above-mentioned problems, and is intended to provide a multi-step die that can complete the final product by forging continuously step by step without replacing the die even if the input material is larger than the size of the final product and cannot be forged at once. to provide.

As a means to solve the above problem, the present invention is installed in the upper sea, lower body, and two side slits formed in a 4-die forging device, and forges input materials that cannot be forged at once in stages. This provides a multi-step die to create the final product.

In addition, the multi-step die of the present invention includes an upper die with one side fastened to the upper body for forging the upper part of the input material, a lower die with one side fastened to the lower body for forging the lower part of the input material, and the side slide. It may include forming a side die in which one side is respectively fastened to each side for forging both sides of the input material.

In addition, the multi-step die of the present invention, on each other side of the upper die, the lower die, and the side die, is stepped from the front to the rear, respectively, and has two or more pressurizations whose heights gradually increase toward the center of the input material. It may include being formed so that the parts are connected.

In addition, the multi-step die of the present invention may include one in which the upper die, the lower die, and the side die can forge the cross-sectional area of the input material to have a square or rectangular shape.

Through the above configuration, the multi-step die according to an embodiment of the present invention can continuously step-by-step forge materials that cannot be forged at once because the input material is larger than the size of the final product, thereby producing the final product. It can be completed.

Therefore, there is no need to reheat the input material due to existing die replacement, and no additional replacement or maintenance time occurs, thereby preventing safety accidents for workers and increasing the productivity of the final product. There is.

In addition, the simple structure makes it easy to install and disassemble, saving time and costs related to maintenance.

Figure 1 is a diagram showing a 4-die forging device.
Figure 2 is a diagram schematically showing a forging process using a conventional die.
Figure 3 is a diagram showing a multi-step die according to an embodiment of the present invention.
Figure 4 is a diagram showing a state in which a multi-step die according to an embodiment of the present invention is installed in a 4-die forging device.
Figure 5 is a diagram schematically showing a forging process using a multi-step die according to an embodiment of the present invention.
Figure 6 is a diagram showing a forging state of a multi-step die according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of a multi-step die according to an embodiment of the present invention will be described in more detail based on the attached drawings.

Here, in all the drawings below, components having the same function are given the same reference numerals, and repeated descriptions are omitted. In addition, the terms described below are defined in consideration of the functions in the present invention, and this is a unique commonly used term. It must be interpreted with meaning. Additionally, in describing the present invention below, if a detailed description of a related known function or configuration is judged to unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Additionally, when a part is said to 'include' a certain component, this does not mean that other components are excluded, but that it can further include other components, unless specifically stated to the contrary.

Figure 3 is a diagram showing a multi-step die according to an embodiment of the present invention, and Figure 4 is a diagram showing the multi-step die according to an embodiment of the present invention installed in a 4-die forging device, Figure 5 is a diagram schematically showing a forging process using a multi-step die according to an embodiment of the present invention.

Referring to Figures 3 and 5, the configuration of the multi-step die 100 according to an embodiment of the present invention is as follows.

As shown in FIG. 4, the 4-die forging device 1000 includes a movable upper body 1110 with inclined surfaces formed on the lower surface toward both ends, and a fixed lower body with inclined surfaces formed on the upper surface by enhancing both ends. It is disposed between the body 1120 and the upper body 1101 and the lower body 1120, and has an inclined surface at the upper part corresponding to an inclined surface of the upper body 1110, and at the lower part of the lower body 1120. Two side slides (1130, 1140) having an inclined surface corresponding to the inclined surface, the upper body (1110) and the side slides (1130, 1140), the lower body (1120) and the side slides (1130, 1140) It is formed of a plurality of guideways 1150 that are dynamically connected to each other.

An upper die 110 is formed on one side of the upper body 1110 to forge the upper part of the input material (P), and one side is fastened to the lower body 1120 to forge the lower part of the input material (P). A lower die 120 is formed, and one side is fastened to the two side slides 1130 and 1140 to form corresponding side dies 130 and 140 for forging both sides of the input material, respectively.

In addition, each other side of the upper die 110, the lower die 120, and the side dies 130 and 140 is gradually stepped from the front to the rear, and the height gradually increases toward the center of the input material, Pressing parts 111, 121, 131, and 141 are formed to continuously press down the long input material.

The pressing portions 111, 121, 131, and 141 formed on the upper die 110, the lower die 120, and the side die 130, respectively, are, as an example, a first pressing portion located on the front side. It consists of (111a, 121a, 131a, 141a), second pressing parts (111b, 121b, 131b, 141b) located in the middle, and third pressing parts (111c, 121c, 131c, 141c) located in the rear.

The first pressing parts (111a, 121a, 131a, 141a) are for the primary forging process of a long input material, and are formed to have an arbitrary height h1 toward the center of the input material.

The second pressing parts (111b, 121b, 131b, 141b) are for the secondary forging process of a long input material, and the first pressing parts (111a, 121a, 131a, 141a) are directed toward the center of the input material. It is formed to have a larger height (h2).

The third pressing parts (111c, 121c, 131c, 141c) are for the third forging process of the input material with a final length, and the second pressing parts (111b, 121b, 131b, It is formed to have a height (h3) greater than 141b).

Meanwhile, the expression of height (h1, h2, h3) disclosed in the present invention is a term for explaining the present invention, and the height can be expressed differently in terms of length or size, etc.

Referring to FIG. 6, the multi-step die according to an embodiment of the present invention can forge the upper die, the lower die, and the side die so that the cross-sectional area of the input material is square or rectangular.

That is, by making the width of the upper die and the lower die and the width of the side die the same, the input material can be forged so that the cross-sectional area is square, and the width of the upper die and the lower die and the side die are the same. By varying the width, the input material can be forged so that its cross-sectional area forms a rectangular shape.

The operation of the multi-step die 100 according to an embodiment of the present invention configured as described above will be described as follows.

Referring to Figure 5, in the first forging process, heat is applied to a long input material through a heating furnace before starting forging, and then the heated input material is fed into the upper die 110, the lower die 120, and the side die 130. , 140), forging is performed to first reduce the cross-sectional area by pressing it to the first pressing portions 111a, 121a, 131a, and 141a formed on each other side.

Thereafter, in the secondary forging process, the input material whose cross-sectional area is first reduced is successively pressed to the second pressing parts (111b, 121b, 131b, 141b) to perform forging in which the cross-sectional area is secondarily reduced.

Lastly, in the third forging process, the input material whose cross-sectional area was reduced a second time was successively pressed to the third pressing section (111c, 121c, 131c, 141c) to reduce the cross-sectional area a third time, thereby completing the final product.

Therefore, even if the input material is larger than the size of the final product and cannot be forged at once, the final product can be completed by continuously forging in stages without replacing the die.

In addition, since there is no need to reheat the input material due to existing die replacement, and no additional replacement or maintenance time is incurred, safety accidents for workers can be prevented in advance, and productivity of the final product can be further increased. there is.

100: Multi-step die
110: upper die
111: pressurizing part
111a: first pressurizing part
111b: second pressurizing part
111c: third pressurizing part
120: lower die
121: pressurizing part
121a: first pressurizing part
121b: second pressurizing part
121c: third pressurizing part
130: side die
131: pressurizing part
131a: first pressurizing part
131b: second pressurizing part
131c: Third pressurizing part
140: side die
141: pressurizing part
141a: first pressurizing part
141b: second pressurizing part
141c: Third pressurizing part

Claims (3)

It is a multi-step die that is installed on the upper body, lower body, and two side slits formed in a 4-die forging device to complete the final product by forging input materials that cannot be forged at once in stages,
An upper die, one side of which is fastened to the upper body, for forging the upper part of the input material,
A lower die, one side of which is fastened to the lower body, for forging the lower part of the input material,
One side is each fastened to the side slide to form a side die for forging both sides of the input material, respectively,
On the other side of the upper die, the lower die, and the side die, two or more pressing parts are formed to be connected, each step increasing from the front to the rear, and gradually increasing in height toward the center of the input material. die.
According to claim 1,
The pressurizing part is,
a first pressing portion formed on each front side of the upper die, the lower die, and the side die and having an arbitrary height;
a second pressing part connected to the rear of the first pressing part and having a height greater than the first pressing part;
A multi-step die comprising a third pressing part connected to the rear of the second pressing part and having a height greater than the second pressing part.
According to claim 1,
The upper die, the lower die, and the side die are capable of forging the input material so that its cross-sectional area has a square or rectangular shape.

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