KR20100001290A - Manufacture method of track link - Google Patents

Manufacture method of track link Download PDF

Info

Publication number
KR20100001290A
KR20100001290A KR1020080061151A KR20080061151A KR20100001290A KR 20100001290 A KR20100001290 A KR 20100001290A KR 1020080061151 A KR1020080061151 A KR 1020080061151A KR 20080061151 A KR20080061151 A KR 20080061151A KR 20100001290 A KR20100001290 A KR 20100001290A
Authority
KR
South Korea
Prior art keywords
frequency
heat treatment
link
high frequency
track link
Prior art date
Application number
KR1020080061151A
Other languages
Korean (ko)
Other versions
KR101009771B1 (en
Inventor
김정구
김치환
Original Assignee
현대제철 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대제철 주식회사 filed Critical 현대제철 주식회사
Priority to KR1020080061151A priority Critical patent/KR101009771B1/en
Publication of KR20100001290A publication Critical patent/KR20100001290A/en
Application granted granted Critical
Publication of KR101009771B1 publication Critical patent/KR101009771B1/en

Links

Images

Classifications

    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • 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
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
    • 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
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE: A manufacturing method of a track link is provided to increase the productivity by executing a line production and reducing the production costs. CONSTITUTION: A manufacturing method of a track link comprises the steps for: executing the high-frequency heating while moving the material for link processed in the track link form through a milling process and a hot forging process; and successively executing the high-frequency quenching heating process and the high-frequency tempering heating process on the surface of the material for link by using a high-frequency heater(21) and cooling banks(22,24). The high-frequency quenching heating process and the high-frequency tempering heating process are only executed about the side of the material for link contacted to a roller during driving. The high-frequency condition comprises the output of 180~185kw, the voltage of 630~700V, and the range of the frequency 7.6~8.4KHz in the high-frequency quenching heating process. The high-frequency condition comprises the output of 50~70kw, the voltage of 300~400V, and the range of the frequency 2.5~2.9KHz in the high-frequency tempering heating process. The moving speed of a moving chute in the material for link is the range of 14~16mm/sec.

Description

트랙링크의 제조방법{Manufacture method of track link}Manufacturing method of track link

본 발명은 트랙링크의 제조방법에 관한 것으로, 더욱 상세하게는 무한궤도의 크롤러(Crawler)를 구성하는 트랙링크의 제조방법에 관한 것이다. The present invention relates to a method for manufacturing a track link, and more particularly, to a method for manufacturing a track link constituting a crawler crawler.

무한궤도 차량은 건설 중장비, 탱크, 또는 트랙터와 같은 중장비를 일컫는다. 무한궤도 차량의 주행장치인 무한궤도는 여러 개의 트랙 슈(Track shoe)들이 크롤러(Crawler)의 길이방향으로 다수개 배치되어 트랙링크(Track link) 및 트랙 핀(Track pin)에 의해 서로 연속적으로 연결된 구조를 갖는다.A caterpillar vehicle refers to heavy equipment such as construction heavy equipment, tanks, or tractors. The track, which is a driving device of a tracked vehicle, has a plurality of track shoes arranged in the longitudinal direction of a crawler and connected to each other continuously by track links and track pins. Has a structure.

이러한 궤도차량의 이동은 앞, 뒤 롤러 둘레에 트랙 슈를 연결한 고리 모양의 트랙링크를 조립하고, 앞, 뒤 롤러를 동시에 회전시킴으로써 수행된다. 따라서 궤도차량에 조립되는 크랙링크는 차량의 중량에 의한 각종 피로나 충격 및 마모하중 등에 견딜 수 있는 재질로 만들어지며, 특히 주행 중 롤러와 접촉되는 트랙링크의 답면부는 마모가 생길 우려가 크므로 고주파 담금질, 뜨임(Tempering)처리를 실시하여 내마모성이 향상되도록 하고 있다. The movement of the tracked vehicle is performed by assembling an annular track link connecting track shoes around the front and rear rollers, and rotating the front and rear rollers simultaneously. Therefore, the crack link assembled on the track vehicle is made of a material that can withstand various fatigue, impact, and abrasion loads due to the weight of the vehicle. Especially, the surface of the track link contacting the roller during driving has a high risk of wear. Quenching and tempering are performed to improve wear resistance.

종래의 트랙링크의 제조 방법은 다음과 같다. The manufacturing method of the conventional track link is as follows.

즉, 단조 및 밀링 제조에 의해 링크형상으로 제조된 소재(1)를 준비하고, 이 링크용 소재(1)의 외경에 고주파를 사용하여 급가열한 후 담금질하는 방법으로 링크용 소재(1)의 답면부를 경화시킨다. 다음으로 고온 뜨임하여 이 답면부를 강인한 뜨임 마르텐사이트조직으로 만든다. 그리고 마무리제조을 실시하여 트랙링크를 완성한다.That is, the raw material 1 prepared in the form of a link by forging and milling is prepared, and the raw material 1 for linking is quenched by rapid heating using a high frequency in the outer diameter of the linking material 1. Harden the tread. Next, it is tempered at high temperature to form a tough tempered martensite structure. Finishing is then done to complete the track link.

하지만, 도 1에 도시된 종래의 고온 뜨임 방법은 상당한 열처리시간을 요구하며, 별도의 뜨임 노(爐)(3)를 필요로 한다. 따라서 노(3)를 축조하기 위한 추가비용이 소모되는 것은 물론 라인(line)생산 또한 불가능하므로 생산성이 낮은 문제점이 있다. However, the conventional high temperature tempering method shown in FIG. 1 requires considerable heat treatment time and requires a separate tempering furnace 3. Therefore, the additional cost for constructing the furnace 3 is consumed, as well as line production is also impossible, there is a problem of low productivity.

또한, 종래의 고온 뜨임 방법은 트랙링크에서 고주파 가열되지 않은 부위도 고온 뜨임을 받은 상태로 된다. 따라서 이미 링크용 소재(1)가 얻어진 경도보다 더욱 경도가 낮은 부분이 발생되고 이에 따라 트랙링크의 요구되는 경도를 만족하지 못하는 문제점이 있다. In addition, according to the conventional high temperature tempering method, a portion of the track link that is not heated by high frequency is also subjected to high temperature tempering. Therefore, there is a problem in that a portion having a lower hardness than the hardness for which the link material 1 has already been obtained and thus does not satisfy the required hardness of the track link.

본 발명은 상기한 바와 같은 종래의 문제점을 해결하기 위한 것으로, 본 발명의 목적은 트랙링크의 제조과정에서 저비용으로도 트랙링크의 마모수명을 향상시킬 수 있는 트랙링크의 제조방법을 제공하는 것이다. The present invention is to solve the conventional problems as described above, an object of the present invention is to provide a track link manufacturing method that can improve the wear life of the track link at a low cost in the manufacturing process of the track link.

상기한 바와 같은 목적을 달성하기 위한 본 발명의 특징에 따르면, 본 발명은 열간 단조가공과 밀링가공을 통해 트랙링크 형상으로 가공된 링크용 소재를 이송슈트로 이송하면서 고주파 열처리를 실시하되, 상기 링크용 소재가 이송슈트의 상부에 교번적으로 구비된 고주파 열처리기와 냉각뱅크를 통과하는 과정에서 상기 고주파 열처리기와 냉각뱅크를 이용하여 상기 링크용 소재의 표면에 고주파 담금질 열처리와 고주파 템퍼링 열처리를 순차적으로 실시한다. According to a feature of the present invention for achieving the above object, the present invention performs a high frequency heat treatment while transferring a link material processed in a track link shape through a hot forging and milling process to a transfer chute, the link In the course of passing the high frequency heat treatment device and the cooling bank alternately provided on the upper part of the transfer chute, the high frequency heat treatment and the high frequency tempering heat treatment are sequentially performed on the surface of the link material using the high frequency heat treatment machine and the cooling bank. do.

상기 고주파 담금질 열처리와 고주파 템퍼링 열처리는 주행중 롤러와 접촉되는 링크용 소재의 답면부에만 실시한다. The high frequency quenching heat treatment and the high frequency tempering heat treatment are performed only on the tread portion of the link material that is in contact with the roller while driving.

상기 고주파 담금질 열처리시 고주파조건은 출력;180~185kw, 전압:630~700V, 주파수:7.6~8.4KHz의 범위이고, 상기 고주파 템퍼링 열처리시 고주파조건은 출력:50~70kw, 전압:300~400V, 주파수:2.5~2.9의 범위이다. The high frequency conditions during the high-frequency quenching heat treatment output; 180 ~ 185kw, voltage: 630 ~ 700V, frequency: 7.6 ~ 8.4KHz range, the high frequency conditions during the high frequency tempering heat treatment output: 50 ~ 70kw, voltage: 300 ~ 400V, Frequency: It is in the range of 2.5 ~ 2.9.

상기 이송슈트가 상기 링크용 소재를 이송하는 속도는 14~16mm/sec의 범위이다. The speed at which the transfer chute transfers the link material is in the range of 14-16 mm / sec.

본 발명은 트랙 링크를 제조함에 있어, 트랙 링크의 마모수명을 향상시키기 위해 실시되는 열처리공정을 종래의 노 대신 고주파 열처리기로 대체하였다. 이에 따라 별도의 노(爐)를 구비하지 않아도 되므로 생산비가 절감되는 것은 물론, 라인 생산이 가능하여 생산성이 증대되는 효과가 있다. In the present invention, in the manufacture of the track link, the heat treatment process performed to improve the wear life of the track link is replaced by a high frequency heat treatment device instead of the conventional furnace. Accordingly, it is not necessary to provide a separate furnace (爐) to reduce the production cost, as well as the line production is possible to increase the productivity.

또한, 본 발명은 담금질 열처리와 템퍼링 열처리 모두 고주파를 이용하므로 가열시간이 짧고 열효율이 좋아 균일하고 높은 경도의 확보가 가능하다. 따라서 트랙링크의 마모수명을 향상시킬 수 있는 효과가 있다. In addition, in the present invention, both the quenching heat treatment and the tempering heat treatment use high frequency, so that the heating time is short and the thermal efficiency is good, thereby ensuring uniform and high hardness. Therefore, there is an effect that can improve the wear life of the track link.

이하 본 발명에 의한 트랙링크의 제조방법의 바람직한 실시예를 첨부된 도면을 참고하여 상세하게 설명한다.Hereinafter, a preferred embodiment of a method for manufacturing a track link according to the present invention will be described in detail with reference to the accompanying drawings.

도 2에는 본 발명에 의한 트랙링크의 제조방법에 의해 트랙링크가 제조되는 과정이 작업과정도로 도시되어 있고, 도 3a 및 3b에는 본 발명에 의해 경화된 트랙링크의 답면부를 표시한 정면도 및 평면도이다. Figure 2 shows the process of manufacturing the track link by the method of manufacturing the track link according to the present invention, Figures 3a and 3b is a front view and a plan view showing the step surface portion of the track link cured by the present invention to be.

설명의 편의를 위해 트랙링크에 대해 먼저 설명하기로 한다. For convenience of explanation, the track link will be described first.

도 2를 참조하면, 트랙링크(10)는 트랙 슈가 고정되는 슈설치면(11), 연결핀을 끼워넣는 핀구멍(12), 트랙 부시를 끼워넣는 부시구멍(13), 트랙 슈 체결용 볼트가 삽입되는 슈볼트구멍(14), 주행중 롤러와 접촉되는 답면부(15)를 구비한다. Referring to FIG. 2, the track link 10 includes a shoe mounting surface 11 to which a track shoe is fixed, a pin hole 12 into which a connecting pin is inserted, a bush hole 13 into which a track bush is inserted, and a track shoe fastening bolt. Is provided with a shoe-bolt hole 14 into which the tread is inserted, and the tread portion 15 contacting the roller while driving.

이러한 트랙링크(10)는 열간 단조가공(S1)과 밀링가공(S2)을 통해 완성품에 가까운 트랙링크 형상으로 제조하고, 다음으로 주행중 롤러와 접촉되는 답면부(15)의 내마모성을 향상시키기 위해 부분 고주파 열처리(S3,S4)를 실시하게 된다. 보다 정확하게는 링크용 소재(10a)의 답면부(15)에만 고주파 열처리를 실시한다. The track link 10 is manufactured in a track link shape close to the finished product through hot forging (S1) and milling (S2), and then to improve the wear resistance of the step surface portion 15 in contact with the roller while driving. High frequency heat treatment (S3, S4) is performed. More precisely, the high frequency heat treatment is performed only on the step surface portion 15 of the link material 10a.

고주파 열처리는 표면 담금질성이 좋고, 급속가열이 가능하다. 보다 상세하게는 직접가열에 의한 열효율이 좋아 가열시간이 짧으므로 경화면의 산화, 탈탄이 극히 적다. 또한 라인에 의한 대량 생산이 가능하므로 균일한 소입(Quenching)이 가능하다. 이러한 이유로 종래의 노를 이용한 템퍼링 열처리를 고주파 템퍼링 열처리로 대체하고, 고주파 담금질 열처리 후 고주파 템퍼링 열처리가 연속적으로 이루어지도록 구성하였다. High frequency heat treatment has good surface hardenability and rapid heating. In more detail, the thermal efficiency by direct heating is good and the heating time is short, so that the hardened surface is hardly oxidized and decarburized. In addition, mass production by line enables uniform quenching. For this reason, the conventional tempering heat treatment using the furnace was replaced with the high frequency tempering heat treatment, and the high frequency tempering heat treatment after the high frequency quenching heat treatment was configured to be made continuously.

즉, 밀링가공부의 출구측에 이송슈트(20)를 배치하고, 이 이송슈트(20)의 상방으로 고주파 가열로와 냉각뱅크를 교번적으로 설치하여 링크용 소재(10a)가 이송슈트(20)에 의해 이송되는 과정에서 답면부(15)에 고주파 열처리를 실시하는 것이다. 여기서, 고주파 담금질 열처리시 사용되는 노를 고주파 담금질 열처리기(21), 고주파 템퍼링 열처리시 사용되는 노를 고주파 템퍼링 열처리기(23)라 칭하기로 한다. That is, the transfer chute 20 is disposed on the exit side of the milling part, and the high frequency heating furnace and the cooling bank are alternately installed above the transfer chute 20 so that the link material 10a transfers the chute 20. In the process to be transferred by the high frequency heat treatment to the step surface portion 15. Here, the furnace used for the high frequency quenching heat treatment will be referred to as the high frequency quenching heat treatment machine 21 and the furnace used for the high frequency tempering heat treatment.

고주파 열처리 방법은 다음과 같다. The high frequency heat treatment method is as follows.

링크용 소재(10a)의 답면부를 900~950℃의 온도영역까지 고주파 가열하고 120~190℃ 범위까지 급냉하는 고주파 담금질(Quenching) 열처리(S3)를 실시한 후, 담금질 처리로 형성된 마르텐사이트(Martensite)조직을 파괴하지 않도록, 링크용 소재(10a)에 대해서 200~230℃의 온도영역까지 가열하는 고주파 템퍼링(Tempering) 열처리를 실시한다. Martensite formed by quenching after performing high frequency quenching heat treatment (S3) to heat the upper surface of the link material 10a to a temperature range of 900 to 950 ° C. and quench it to a range of 120 to 190 ° C. In order not to destroy the structure, a high frequency tempering heat treatment is performed to heat the linkage material 10a to a temperature range of 200 ° C to 230 ° C.

고주파 담금질 열처리(S3)시 가열온도가 너무 높으면 에너지 손실이 크고 입 자가 조대화되며, 너무 낮으면 탄소고용도가 낮아져 연속하여 진행되는 템퍼링 열처리시 충분한 강도 및 경도를 얻을 수게 된다. 따라서 고주파 담금질 열처리기(21)는 고주파 출력조건이 180~185kw, 전압 630~700V, 주파수 7.6~8.4 범위의 고주파를 출력하여 링크용 소재(10a)를 900~950℃의 온도영역까지 가열한다. If the heating temperature is too high during the high-frequency quenching heat treatment (S3), the energy loss is large and the particles are coarsened. If the heating temperature is too low, the carbon utilization is lowered, so that sufficient strength and hardness can be obtained during the continuous tempering heat treatment. Therefore, the high frequency quenching heat treatment unit 21 outputs a high frequency in the range of high frequency output conditions of 180 ~ 185kw, voltage 630 ~ 700V, frequency 7.6 ~ 8.4 to heat the link material 10a to a temperature range of 900 ~ 950 ℃.

급냉은 이송슈트(20)의 상부에 구비되는 냉각뱅크(22)에서 냉각수가 분사됨에 의해 행해지는데, 이때의 냉각온도에 따라 링크용 소재(10a)의 재질이 결정된다. 이를 위해 링크용 소재는 14 ~ 16mm/sec의 속도로 이송된다. 링크용 소재(10a)의 이송속도는 냉각뿐만 아니라 가열에도 영향을 미치게 되는데, 상기 조건에서는 우수한 내마모 특성을 가지나 이보다 빠르거나 느린 이송속도조건에서는 내마모성을 충분히 확보하기에는 미흡하다. The quenching is performed by spraying the cooling water from the cooling bank 22 provided on the transfer chute 20. The material of the linking material 10a is determined by the cooling temperature at this time. For this purpose, the link material is transported at a speed of 14 to 16 mm / sec. The feed speed of the link material 10a affects not only cooling but also heating, but has excellent wear resistance under the above conditions, but is insufficient to ensure sufficient wear resistance under fast or slow feed rate conditions.

즉, 이송속도가 16mm/sec를 초과하는 경우에는 가열 및 냉각이 충분히 이루어지지 않고, 이송속도가 14mm/sec 미만인 경우에는 가열시간 및 냉각시간이 길어져 링크용 소재(10a)가 과열 과냉됨에 의해 답면부(15)에 크랙이 발생될 수 있는 문제점이 있다. That is, when the feed rate exceeds 16mm / sec, heating and cooling is not sufficiently performed. When the feed rate is less than 14mm / sec, the heating time and the cooling time are long, and the link material 10a is overheated and overcooled. There is a problem that cracks may occur in the unit 15.

고주파 템퍼링 열처리(S4)는 링크용 소재(10a)가 14 ~ 16mm/sec의 속도로 이송되는 과정에서 고주파 담금질 열처리 후 연속하여 이루어진다. 가열온도는 200~230℃범위이며, 가열 후 냉각을 실시한다. 냉각은 고주파 템퍼링 열처리기(23) 출측으로 구비된 냉각뱅크(24)에서 분사되는 냉각수에 의해 이루어진다. The high frequency tempering heat treatment (S4) is made continuously after the high frequency quenching heat treatment in the process of the link material 10a is transferred at a speed of 14 ~ 16mm / sec. Heating temperature is in the range of 200 ~ 230 ℃, cooling after heating. The cooling is performed by the cooling water sprayed from the cooling bank 24 provided to the high frequency tempering heat treatment unit 23 exit side.

고주파 템퍼링 온도는 200℃보다 낮으면 복합탄화물의 미립자를 석출시키지 못하여 경도가 불균일해지고, 230℃보다 높으면 복합탄화물의 과시효에 의해 경도 가 급감하게 된다. 이를 위하여 고주파 템퍼링 열처리기(23)의 고주파의 전압은 300~400V, 주파수는 2.5~2.9, 출력조건은 50~70kw 범위인 고주파가 출력된다. 고주파 템퍼링 열처리는 고주파 담금질 열처리(S3)에 의해 형성된 마르텐사이트를 안정화한다. 이에 따라 링크용 소재(10a)의 답면부(15)가 초경도가 되고 내마모성이 향상된다. If the high frequency tempering temperature is lower than 200 ° C, the hardness of the composite carbide cannot be precipitated and the hardness becomes uneven. If the temperature is higher than 230 ° C, the hardness decreases rapidly due to overaging of the composite carbide. To this end, a high frequency voltage of the high frequency tempering heat treatment unit 23 is 300 ~ 400V, the frequency is 2.5 ~ 2.9, the output condition is a high frequency range of 50 ~ 70kw is output. The high frequency tempering heat treatment stabilizes martensite formed by the high frequency quenching heat treatment S3. Thereby, the tread surface part 15 of the link material 10a becomes superhard, and abrasion resistance improves.

상술한 바와 같은 방법에 의해 고주파 열처리한 링크용 소재(10a)의 답면부 경도는 HRc(로크웰 경도)로 45 이상이며, 바람직하게는 HRc48~HRc52 사이로 된다. The hardness of the tread portion of the link material 10a subjected to the high frequency heat treatment by the above-described method is 45 or more in HRc (Rockwell hardness), preferably between HRc48 and HRc52.

다음으로 열처리한 링크용 소재(10a)에 앤드밀을 이용하여 황삭 및 정삭가공(S5)을 실시한다. 황삭 및 정삭가공(S5)은 핀구멍과 부시구멍을 제조하기 위한 공정이다. 이 후 링크용 소재의 방향을 전환하여 드릴링 가공(S6)을 실시한다. 드릴링 가공(S6)에서는 슈볼트구멍을 가공한다. 그리고, 볼트안착면을 가공하는 브러치 가공(S7)과 버(Burr)를 제거하는 디버링 가공(S8)을 순차적으로 수행하여 트랙링크를 제조한다. Next, roughing and finishing (S5) is performed to the heat-treated link material 10a using an end mill. Roughing and finishing (S5) is a process for manufacturing pin holes and bush holes. After that, the direction of the link material is changed to perform drilling (S6). In drilling (S6), the shoe bolt hole is processed. In addition, the track link is manufactured by sequentially performing the brush processing (S7) for processing the bolt seating surface and the deburring processing (S8) for removing the burr (Burr).

이하, 본 발명의 트랙링크 제조방법을 실시예를 통해 종래의 방법과 비교하여 설명한다. 발명의 이해를 돕고자 본 발명과 종래의 발명의 열처리 조건을 비교예와 실시예의 표로서 나타낸다. Hereinafter, the track link manufacturing method of the present invention will be described by comparing with the conventional method through the embodiment. In order to help the understanding of the invention, the heat treatment conditions of the present invention and the conventional invention are shown as tables of comparative examples and examples.

구분 division 담금질 열처리 Quenching heat treatment 템퍼링 열처리Tempering heat treatment 답면부 경도(HRc) Surface hardness (HRc) 가열방법Heating method 가열온도Heating temperature 가열방법Heating method 가열온도Heating temperature 조건Condition 비교예Comparative example 고주파 (180~185 kw)   High frequency (180 ~ 185 kw) 900~950 (℃)  900 ~ 950 (℃) 노 furnace 200~230 (℃)200 ~ 230 (℃) 노 유지시간 3시간 이상Furnace holding time more than three hours 40~4540-45 실시예Example 고주파 (50~70 kw)High frequency (50 ~ 70 kw) 200~230 (℃)200 ~ 230 (℃) 출력(kw):50~70, 전압(V):300~400, 주파수(KHz):2.5~2.9, 이송속도(mm/sec):14~16  Output (kw): 50 to 70, Voltage (V): 300 to 400, Frequency (KHz): 2.5 to 2.9, Feed rate (mm / sec): 14 to 16 48~52 48-52

표 1에서 확인할 수 있는 바와 같이, 본 발명의 고주파 템퍼링 열처리를 이용한 제조방법이 종래의 노 템퍼링 열처리를 이용한 제조방법보다 가열시간이 짧고 답면부 경도도 증가함을 알 수 있다. As can be seen from Table 1, it can be seen that the manufacturing method using the high-frequency tempering heat treatment of the present invention is shorter heating time and the hardness of the back surface than the conventional manufacturing method using the furnace tempering heat treatment.

이와 같은 본 발명의 기본적인 기술적 사상의 범주 내에서, 당업계의 통상의 지식을 가진 자에게 있어서는 다른 많은 변형이 가능함은 물론이고, 본 발명의 권리범위는 첨부한 특허청구 범위에 기초하여 해석되어야 할 것이다.Within the scope of the basic technical idea of the present invention, many other modifications are possible to those skilled in the art, and the scope of the present invention should be interpreted based on the appended claims. will be.

도 1은 종래의 트랙링크의 제조방법을 보인 작업과정도. 1 is a process diagram showing a conventional method for manufacturing a track link.

도 2는 본 발명에 의한 트랙링크의 제조방법에 의해 트랙링크가 제조되는 과정을 보인 작업과정도. Figure 2 is a process diagram showing a process in which the track link is manufactured by the method for manufacturing a track link according to the present invention.

도 3a 및 3b는 본 발명에 의해 경화된 트랙링크의 답면부를 표시한 정면도 및 평면도. 3A and 3B are front and plan views showing the tread portion of the track link cured by the present invention;

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10:트랙링크 10a:트랙링크용 소재10: Track link 10a: Material for track link

11:슈설치면 12:핀구멍11: Shoe mounting surface 12: Pin hole

13:부시구멍 14:슈볼트구멍13: Bush hole 14: Shoe bolt hole

15:답면부 20:이송슈트15: answering section 20: transfer suit

21:고주파 담금질 열처리기 23:고주파 템퍼링 열처리기21: high frequency quenching heat treatment machine 23: high frequency tempering heat treatment machine

22, 24:냉각뱅크22, 24: cooling bank

Claims (4)

열간 단조가공과 밀링가공을 통해 트랙링크 형상으로 가공된 링크용 소재를 이송슈트로 이송하면서 고주파 열처리를 실시하되, High frequency heat treatment is carried out while transferring the link material processed into the track link shape through hot forging and milling. 상기 링크용 소재가 이송슈트의 상부에 교번적으로 구비된 고주파 열처리기와 냉각뱅크를 통과하는 과정에서 상기 고주파 열처리기와 냉각뱅크를 이용하여 상기 링크용 소재의 표면에 고주파 담금질 열처리와 고주파 템퍼링 열처리를 순차적으로 실시하는 것을 특징으로 하는 트랙링크의 제조방법. In the course of passing the high frequency heat treatment device and the cooling bank alternately provided on the upper portion of the transfer chute, the high frequency heat treatment and the high frequency tempering heat treatment are sequentially performed on the surface of the link material by using the high frequency heat treatment machine and the cooling bank. Process for producing a track link, characterized in that carried out by. 청구항 1에 있어서, The method according to claim 1, 상기 고주파 담금질 열처리와 고주파 템퍼링 열처리는 주행중 롤러와 접촉되는 링크용 소재의 답면부에만 실시하는 것을 특징으로 하는 트랙링크의 제조방법. The high-frequency quenching heat treatment and the high-frequency tempering heat treatment is performed only on the step surface portion of the link material in contact with the roller while driving. 청구항 2에 있어서, The method according to claim 2, 상기 고주파 담금질 열처리시 고주파조건은 출력;180~185kw, 전압:630~700V, 주파수:7.6~8.4KHz의 범위이고, 상기 고주파 템퍼링 열처리시 고주파조건은 출력:50~70kw, 전압:300~400V, 주파수:2.5~2.9의 범위임을 특징으로 하는 트랙링크의 제조방법. The high frequency conditions during the high-frequency quenching heat treatment output; 180 ~ 185kw, voltage: 630 ~ 700V, frequency: 7.6 ~ 8.4KHz range, the high frequency conditions during the high frequency tempering heat treatment output: 50 ~ 70kw, voltage: 300 ~ 400V, Frequency: A method for producing a track link, characterized in that the range of 2.5 ~ 2.9. 청구항 1항 또는 청구항 3항 중 어느 한 항에 있어서, The method according to claim 1 or 3, 상기 이송슈트가 상기 링크용 소재를 이송하는 속도는 14~16mm/sec의 범위임을 특징으로 하는 트랙링크의 제조방법. Speed of the transfer chute transfer the material for the link is a manufacturing method of the track link, characterized in that the range of 14 ~ 16mm / sec.
KR1020080061151A 2008-06-26 2008-06-26 Manufacture method of track link KR101009771B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080061151A KR101009771B1 (en) 2008-06-26 2008-06-26 Manufacture method of track link

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080061151A KR101009771B1 (en) 2008-06-26 2008-06-26 Manufacture method of track link

Publications (2)

Publication Number Publication Date
KR20100001290A true KR20100001290A (en) 2010-01-06
KR101009771B1 KR101009771B1 (en) 2011-01-19

Family

ID=41811603

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020080061151A KR101009771B1 (en) 2008-06-26 2008-06-26 Manufacture method of track link

Country Status (1)

Country Link
KR (1) KR101009771B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103540719A (en) * 2013-10-24 2014-01-29 新昌县楷翔机电有限公司 Novel high-frequency quenching machine
KR101455456B1 (en) * 2012-07-30 2014-10-27 현대제철 주식회사 Tempering system of martensite steel coil and tempering method using the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58167727A (en) * 1982-03-26 1983-10-04 Topy Ind Ltd Method of high-frequency quenching link of caterpillar
JP3033842B2 (en) * 1990-11-20 2000-04-17 高周波熱錬株式会社 Manufacturing method of wire for cold working and equipment for manufacturing wire for cold working
KR960014504A (en) * 1994-10-07 1996-05-22 이헌조 How to feed / clean your washing machine
JP2001214214A (en) 2000-01-31 2001-08-07 High Frequency Heattreat Co Ltd Working and hardening method of deformed spring steel wire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101455456B1 (en) * 2012-07-30 2014-10-27 현대제철 주식회사 Tempering system of martensite steel coil and tempering method using the same
CN103540719A (en) * 2013-10-24 2014-01-29 新昌县楷翔机电有限公司 Novel high-frequency quenching machine

Also Published As

Publication number Publication date
KR101009771B1 (en) 2011-01-19

Similar Documents

Publication Publication Date Title
JP4043298B2 (en) Track link manufacturing method and track link manufactured by the manufacturing method
CN105349940B (en) Hot forging identifies the carburizing carbo-nitriding composite heat treating method of mould steel
JP5268225B2 (en) Method for manufacturing roller shell of lower traveling body of construction machine
CN103205551A (en) Thermal treatment processing method of thrust wheel
JP2004060003A (en) Method for producing link for endless track
KR100684590B1 (en) Heat treatment manufacturing apparatus and its method
CN101974676B (en) Breaking-preventing knuckle spindle and thermal treatment method thereof
KR101009771B1 (en) Manufacture method of track link
JP3897434B2 (en) Crawler belt bushing and manufacturing method thereof
US20220009569A1 (en) Scallop-resistant track link and method of making same
JP4859889B2 (en) Manufacturing method of crawler belt bush
US5049207A (en) Heat treatment process for bushing used in track of endless track tractor
JPH0978134A (en) Manufacture of link for caterpillar belt
JP4916365B2 (en) Crawler bush
JP3856536B2 (en) Crawler belt bushing and manufacturing method thereof
CN102634650A (en) Thermal treatment method for hinge pin shaft of hydraulic support
JPH03166320A (en) Track bushing and its production
EP0339152A1 (en) Heat treatment process for bushing used in track of endless track tractor
JPS6233991B2 (en)
JPH01272719A (en) Bushing hardened to large depth and production thereof
JPH01165725A (en) Track bushing hardened at high depth and its production
JPH0978136A (en) Manufacture of link for caterpillar belt
KR920000522B1 (en) Heat treatment process for bushing used in track of endless track tractor
JPH0978135A (en) Manufacture of link for caterpillar belt
KR20200089390A (en) Track bush manufacturing method based on high frequency heat treatment

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20131227

Year of fee payment: 4

LAPS Lapse due to unpaid annual fee