KR20120064195A - Partial heating method of partial forging crankshaft using furnace - Google Patents

Partial heating method of partial forging crankshaft using furnace Download PDF

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KR20120064195A
KR20120064195A KR1020100125312A KR20100125312A KR20120064195A KR 20120064195 A KR20120064195 A KR 20120064195A KR 1020100125312 A KR1020100125312 A KR 1020100125312A KR 20100125312 A KR20100125312 A KR 20100125312A KR 20120064195 A KR20120064195 A KR 20120064195A
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South Korea
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partial
heating
crankshaft
forging
heated
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KR1020100125312A
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Korean (ko)
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이명규
송민철
김성호
정석환
박덕수
박연구
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현대중공업 주식회사
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Priority to KR1020100125312A priority Critical patent/KR20120064195A/en
Publication of KR20120064195A publication Critical patent/KR20120064195A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/08—Making machine elements axles or shafts crankshafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K29/00—Arrangements for heating or cooling during processing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Forging (AREA)

Abstract

PURPOSE: A partial heating method using an entire heating furnace in partial forging of a crankshaft is provided to exclude a partial heating furnace by heating a necessary part of a preform using a shield, thereby reducing costs. CONSTITUTION: A partial heating method using an entire heating furnace in partial forging of a crankshaft(10) is as follows. A preform is divided into a partial heating part to be heated for forging and an insulated part not to be heated. A shield(20) is installed in the insulated part which is blocked from radiant heat so that only the partial heating part is heated.

Description

크랭크샤프트 부분형단조시 전체가열로를 이용한 부분가열 방법{Partial heating method of partial forging crankshaft using furnace}Partial heating method of partial forging crankshaft using furnace

본 발명은 크랭크샤프트 부분형단조시 전체가열로를 이용한 부분가열 방법에 관한 것으로, 크랭크샤프트를 부분가열하기 위한 가열로가 없을 경우 전체가열로 내부에서 가열하지 않을 부분에 차단막을 설치하여 복사열을 차단해줌으로써 단조될 부분만 부분 가열할 수 있도록 하는 크랭크샤프트 부분형단조시 전체가열로를 이용한 부분가열 방법에 관한 것이다.
The present invention relates to a partial heating method using the entire heating furnace in the forging of the crankshaft part, in the absence of a heating furnace for partially heating the crankshaft, by installing a shielding film in the portion that will not be heated inside the entire heating furnace to block radiant heat The present invention relates to a partial heating method using a whole heating furnace during crankshaft partial forging, which enables partial heating of only a portion to be forged.

일반적으로 중형엔진의 크랭크샤프트는 TR단조 또는 RR단조라고 하는 부분 형단조 방법으로 제작된다.Generally, the crankshaft of a medium engine is manufactured by a partial forging method called TR forging or RR forging.

여기서 TR단조는 상부금형이 좌우대칭으로 나누어지고 재료에 힘이 가해질 경우 링크 기구에 의해서 업셋팅과 굴곡을 동시에 할 수 있는 단조이고, RR단조는 좌우대칭으로 분리된 상하 금형이 이동대 내에 세트되어, 재료에 힘이 가해질때 이동대 테이퍼 부의 이동 기구에 의하여 업셋팅과 굴곡을 동시에 할 수 있는 단조이다.Here, TR forging is forging that can be upset and bent at the same time by the link mechanism when the upper mold is divided into left and right symmetry, and RR forging is set up in the movable table. When the force is applied to the material, it is forging that can simultaneously set up and bend by the moving mechanism of the moving taper part.

상기와 같은 크랭크샤프트를 형단조 할 경우, 긴 환봉 형태의 예비성형체를 복사열을 이용하여 가열한 후 단조작업을 수행한다.When forging the crankshaft as described above, the forging operation is performed after heating the preform in the form of a long round rod using radiant heat.

이때 크랭크샤프트를 형성하기 위한 예비성형체는 길이가 매우 길기 때문에 금형을 이용하여 한번에 단조할 수 없다.At this time, since the preform for forming the crankshaft is very long, it cannot be forged at once using a mold.

따라서 크랭크샤프트의 일부분만 가열한 후 가열된 부분만 단조 하는 과정을 반복하여 크랭크샤프트의 전체적인 단조작업을 수행하였다.Therefore, the entire process of forging the crankshaft was performed by repeating the process of forging only the heated part after heating only a part of the crankshaft.

그러나 크랭크샤프트의 일부분을 가열하기 위해서는 부분가열로가 필요하나 이러한 장비가 없을 경우 전체가열로를 이용하여 가열해야 한 후 단조해야 한다.However, in order to heat a part of the crankshaft a partial heating furnace is required, but in the absence of such equipment, the entire heating furnace must be used for heating before forging.

이때 크랭크샤프트를 전체가열로에서 가열할 경우 미리 단조되어 있는 부분이나 단조하지 않아도 될 구간까지 가열되어 치수 변형 및 고온에서 산화 스케일로 인하여 소재 손실이 발생하는 문제점이 있다.
At this time, when the crankshaft is heated in the entire heating furnace, there is a problem in that the material loss occurs due to the dimensional deformation and the oxidative scale at a high temperature because it is heated up to a portion that is not forged in advance or a section that does not have to be forged.

상기와 같은 문제점을 해결하기 위한 본 발명의 목적은, 전체가열로 내부에서 크랭크샤프트의 형단조를 위한 가열시 가열부분을 제외한 부분에 차단막을 설치하여 복사열을 차단해줌으로써 단조될 부분만 부분가열할 수 있도록 함으로써 단조작업이 완료된 부분에는 치수의 변형이나 소재의 손실이 발생되지 않도록 하는 크랭크샤프트 부분형단조시 전체가열로를 이용한 부분가열 방법을 제공함에 있다.
An object of the present invention for solving the above problems is to install only the portion to be forged by blocking the radiant heat by installing a shielding film in the entire heating furnace for heating the forging of the crankshaft inside the entire heating furnace. It is to provide a partial heating method using the entire heating furnace during the crankshaft partial forging to prevent the deformation of the dimensions or the loss of the material in the forging work is completed.

상기한 바와 같은 목적을 달성하고 종래의 결점을 제거하기 위한 과제를 수행하는 본 발명은, 전체가열로의 내부에서 예비성형체를 부분가열하는 방법에 있어서, 상기 예비성형체를 단조를 하기 위해 가열시켜주는 부분가열부와, 가열되지 않도록 하는 단열부로 구획하고, 상기 단열부에 차단막을 설치하여 가열함으로써 상기 단열부는 차단막에 의해 복사열이 차단되고, 부분가열부만 가열되도록 하는 것을 특징으로 한다.
The present invention to achieve the object as described above and to solve the conventional drawbacks, in the method of partially heating the preform in the interior of the entire heating furnace, the preform is heated to forge The heat insulating part is partitioned into a partial heating part and a heat insulating part not to be heated, and a heat shielding part is provided by heating the heat insulating part so that the radiant heat is blocked by the blocking film and only the partial heating part is heated.

이상에서 설명한 바와 같이 본 발명에 의하면, 전체가열로에서 단조를 위해 예비성형체를 가열한다 하더라도 차단막을 이용하여 가열에 필요한 부분만을 가열할 수 있어, 예비성형체의 변형을 방지하면서 소재의 손실을 방지하고, 별도의 국부가열로가 필요치 않게 되어 비용이 절감되며, 차단막을 내화천으로 사용함으로써 부분가열에 필요한 비용을 절감시킬 수 있는 매우 유용한 발명이다.
As described above, according to the present invention, even if the preform is heated in the entire heating furnace for forging, it is possible to heat only a portion necessary for heating by using a barrier film, thereby preventing material loss while preventing deformation of the preform. It is a very useful invention that can reduce the cost required for partial heating by using a separate membrane as a refractory cloth, because no separate local heating furnace is required.

도 1 은 본 발명에 의한 크랭크샤프트를 부분가열하기 위하여 단열부에 차단막을 설치한 상태를 나타낸 예시도,
도 2 는 본 발명에 의한 크랭크샤프트의 부분가열 후 차단막을 벗겨낸 상태를 나타낸 예시도,
도 3 은 본 발명에 의한 크랭크샤프트의 부분가열 상태를 나타낸 예시도,
도 4 는 본 발명에 의한 크랭크샤르트의 부분가열시 온도 변화상태를 나타낸 예시도.1 is an exemplary view showing a state in which a blocking film is installed in the heat insulating part to partially heat the crankshaft according to the present invention;
2 is an exemplary view showing a state in which the blocking film is peeled off after the partial heating of the crankshaft according to the present invention;
3 is an exemplary view showing a partial heating state of the crankshaft according to the present invention,
Figure 4 is an exemplary view showing a temperature change state during partial heating of the crankshaft according to the present invention.

이하 본 발명의 실시 예인 구성과 그 작용을 첨부도면에 연계시켜 상세히 설명하면 다음과 같다. 또한 본 발명을 설명함에 있어서, 관련된 공지기능 혹은 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우 그 상세한 설명은 생략한다.Hereinafter, the configuration and the operation of the embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

도 1 은 본 발명에 의한 크랭크샤프트를 부분가열하기 위하여 단열부에 차단막을 설치한 상태를 나타낸 예시도, 도 2 는 본 발명에 의한 크랭크샤프트의 부분가열 후 차단막을 벗겨낸 상태를 나타낸 예시도, 도 3 은 본 발명에 의한 크랭크샤프트의 부분가열 상태를 나타낸 예시도, 도 4 는 본 발명에 의한 크랭크샤르트의 부분가열시 온도 변화상태를 나타낸 예시도로서,1 is an exemplary view showing a state in which a blocking film is installed in the heat insulating part in order to partially heat the crankshaft according to the present invention, FIG. 2 is an exemplary view showing a state in which the blocking film is peeled off after the partial heating of the crankshaft according to the present invention; 3 is an exemplary view showing a partial heating state of the crankshaft according to the present invention, Figure 4 is an exemplary view showing a temperature change state during the partial heating of the crankshaft according to the present invention,

본 발명의 실시예를 통한 예비성형체는 크랭크샤프트(10)로써, 이러한 크랭크샤프트(10)는 길이가 매우 길게 형성되며, 단조될 부분만 부분 가열하여 단조작업을 수행한다.The preform according to an embodiment of the present invention is a crankshaft 10, the crankshaft 10 is formed of a very long length, only the portion to be forged to perform a forging operation.

본 발명은 전체가열로의 내부에서 상기 크랭크샤프트(10)의 부분 단조를 위한 부분가열부(11)와, 가열되지 않도록 하는 단열부(12)로 구획하고, 상기 단열부(12)에 차단막(20)을 설치하여 가열함으로써, 상기 단열부(12)는 차단막(20)에 의해 복사열이 차단되어 가열되지 않고, 차단막(20)이 설치되지 않은 부분가열부(11)는 원하는 온도로 가열시킬 수 있게 된다.The present invention is partitioned into a partial heating part 11 for partial forging of the crankshaft 10 in the interior of the entire heating furnace, and a heat insulating part 12 to prevent heating, and a blocking film on the heat insulating part 12. By installing and heating 20, the heat insulation portion 12 is not radiated heat is blocked by the shielding film 20 is not heated, the partial heating portion 11 is not provided with the shielding film 20 can be heated to a desired temperature. Will be.

상기 전체가열로에서 단조를 위한 가열온도는 통상 1200도 정도이며 주된 열전달 방법이 복사(radiation)로써, 복사열을 이용하여 가열시켜준다.The heating temperature for forging in the entire heating furnace is usually about 1200 degrees and the main heat transfer method is radiation, which is heated using radiant heat.

상기 차단막(20)은 이 복사열이 단열부(12)에 가해지는 것을 방지할 수 있도록 단열부(12)에 설치됨으로써 열전달을 차단한다.The blocking film 20 is installed in the heat insulating portion 12 to prevent the radiant heat from being applied to the heat insulating portion 12 to block heat transfer.

또한 이러한 차단막(20)은 내화천 등의 섬유재질로 사용할 수 있으며, 단열부(12)를 감싸주도록 설치한다.In addition, the barrier film 20 may be used as a fiber material, such as a fireproof cloth, it is installed to surround the heat insulating portion (12).

또한 차단막(20)은 단열부(12)를 전체적으로 감싸줄 수 있는 크기의 차단막이 있다면, 이를 이용하여 단열부(12)를 한번에 감싸도록 설치하고, 차단막(20)의 폭이 단열부(12)의 폭 보다 작다면 다수의 차단막(20)을 일부분씩 서로 겹쳐지도록 하여 단열부(12)를 감싸준다.In addition, the shielding film 20 is installed to wrap the heat insulating portion 12 at a time by using it, if there is a blocking film of the size that can completely wrap the heat insulating portion 12, the width of the blocking film 20 of the heat insulating portion 12 If the width is smaller than the plurality of shielding film 20 to partially overlap each other to surround the heat insulating portion 12.

이렇게 차단막(20)을 겹쳐지도록 설치함으로써 차단막(20)과 차단막(20) 사이로 복사열이 침투되는 것을 방지해주게 된다.By installing the barrier film 20 so as to overlap, the radiant heat is prevented from penetrating between the barrier film 20 and the barrier film 20.

한편 본 발명은 도 2, 3, 4 에서와 같이 크랭크샤프트(10)를 전체가열로에서 부분가열 후 차단막(20)을 벗겨냈을 경우, 차단막(20)에 의해 복사열이 차단된 단열부(12)는 온도의 상승이 거의 일어나지 않았으며, 차단막(20)이 설치되지 않은 부분가열부(11)는 단조가 가능한 온도로 가열되어 있는 것을 알 수 있다.On the other hand, the present invention, when the crankshaft 10 is peeled off the shielding film 20 after the partial heating in the entire heating furnace as shown in Figures 2, 3, 4, the radiant heat is blocked by the shielding film 20 (12) It can be seen that the increase in temperature hardly occurred, and the partial heating part 11 in which the blocking film 20 was not installed is heated to a temperature that can be forged.

이와 같은 본 발명은 상기와 같이 전체가열로를 통한 크랭크샤프트(10)의 가열시 차단막(20)을 이용하여 가열이 필요하지 않은 부분은 가열되지 않도록 함으로써 크랭크샤프트(10) 전체가 가열될 경우에 비하여 치수의 변형 및 소재의 손실을 최소화할 수 있게 된다.The present invention as described above is when the entire crankshaft 10 is heated by preventing the heating of the crankshaft 10 through the entire heating furnace by using a blocking film 20 so as not to heat the portion that does not require heating. In comparison, the deformation of the dimension and the loss of the material can be minimized.

또한 차단막(20)의 설치가 간편하고 설치비용이 저렴하여 누구나 쉽게 작업을 수행할 수 있어 국부가열로가 없더라도 전체가열로에서 필요한 부분만 가열할 수 있게 된다.
In addition, since the installation of the barrier film 20 is simple and the installation cost is low, anyone can easily perform the operation, so that only the necessary portion of the entire heating furnace can be heated even without a local heating furnace.

본 발명은 상술한 특정의 바람직한 실시 예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.
It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(10) : 크랭크샤프트
(11) : 부분가열부
(12) : 단열부
(20) : 차단막(10): crankshaft
(11): Partial heating part
(12): heat insulation
20: blocking film

Claims (1)

전체가열로의 내부에서 예비성형체를 부분가열하는 방법에 있어서,
상기 예비성형체를 단조를 하기 위해 가열시켜주는 부분가열부와, 가열되지 않도록 하는 단열부로 구획하고,
상기 단열부에 차단막을 설치하여 가열함으로써 상기 단열부는 차단막에 의해 복사열이 차단되고, 부분가열부만 가열되도록 하는 것을 특징으로 하는 크랭크샤프트 부분형단조시 전체가열로를 이용한 부분가열 방법.In the method of partially heating the preform inside the whole heating furnace,
The preform is divided into a partial heating part for heating to forge, and a heat insulating part not to be heated,
Partial heating method using the entire heating furnace for the crankshaft partial forging, characterized in that the heat shield is installed by heating the heat shield in the heat insulating part is cut off the radiant heat by the blocking film, so that only the partial heating part is heated.
KR1020100125312A 2010-12-09 2010-12-09 Partial heating method of partial forging crankshaft using furnace KR20120064195A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103128208A (en) * 2013-04-03 2013-06-05 万向钱潮传动轴有限公司 Novel forming process of spline sleeve
KR101719952B1 (en) * 2016-01-29 2017-03-27 주식회사 효성 Heater for a hydrocarbon stream

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103128208A (en) * 2013-04-03 2013-06-05 万向钱潮传动轴有限公司 Novel forming process of spline sleeve
KR101719952B1 (en) * 2016-01-29 2017-03-27 주식회사 효성 Heater for a hydrocarbon stream

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