KR100646246B1 - Method for manufacturing a sliding bearing - Google Patents

Method for manufacturing a sliding bearing Download PDF

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KR100646246B1
KR100646246B1 KR1020050054944A KR20050054944A KR100646246B1 KR 100646246 B1 KR100646246 B1 KR 100646246B1 KR 1020050054944 A KR1020050054944 A KR 1020050054944A KR 20050054944 A KR20050054944 A KR 20050054944A KR 100646246 B1 KR100646246 B1 KR 100646246B1
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South Korea
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mixed powder
base material
metal mixed
powder layer
sliding bearing
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KR1020050054944A
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Korean (ko)
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윤덕재
나경환
최석우
임성주
정하국
이태희
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한국생산기술연구원
주식회사 루-보
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/16—Both compacting and sintering in successive or repeated steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • B22F5/106—Tube or ring forms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
    • B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Powder Metallurgy (AREA)

Abstract

A method for manufacturing a sliding bearing is provided to manufacture a sliding bearing for high load and high strength by improving density and bond strength of a metal mixed powder layer bonded with a matrix and minimize and simplify the manufacturing process by forming oil grooves in the metal mixed powder layer through a process of pressing a mixed powder of the matrix and metal. In a method for manufacturing a sliding bearing, comprising a matrix inserting step(S100), a metal mixed powder supply step(S200), a metal mixed powder pressing step(S300), a carrying out step(S400), a sintering step(S500), a re-pressing step(S600) and a re-sintering step(S700), the method is characterized in that: the re-pressing step is performed by simultaneously pressing a matrix(200) and a metal mixed powder layer(300) through a ring rolling unit(500) comprising a shaft(510), a main roller(520) and an edge roller(530); a plurality of oil grooves(310) are formed within the metal mixed powder layer by forming a plurality of projections(511) on an outer peripheral surface of the shaft of the ring rolling unit in the re-pressing step; and the method further comprises a matrix inner diameter processing step(S100') of processing an inner surface of the matrix in an irregular shape before inserting the matrix into a mold(400).

Description

미끄럼베어링 제조방법{Method for manufacturing a sliding bearing}Method for manufacturing a sliding bearing {Method for manufacturing a sliding bearing}

도 1은 종래 기술에 따른 미끄럼베어링 제조방법을 나열한 블록도,1 is a block diagram enumerating a sliding bearing manufacturing method according to the prior art,

도 2는 종래 기술에 따른 미끄럼베어링 제조방법을 순차적으로 도시한 단면도,2 is a cross-sectional view sequentially showing a sliding bearing manufacturing method according to the prior art,

도 3은 본 발명에 따른 미끄럼베어링 제조방법을 나열한 블록도,Figure 3 is a block diagram listing the sliding bearing manufacturing method according to the present invention,

도 4는 본 발명에 따른 미끄럼베어링 제조방법을 순차적으로 도시한 단면도,4 is a cross-sectional view sequentially showing a sliding bearing manufacturing method according to the present invention;

도 5는 본 발명에 따른 링롤링유닛을 도시한 사시도.5 is a perspective view showing a ring rolling unit according to the present invention.

*도면중 주요 부호에 대한 설명** Description of Major Symbols in Drawings *

100 : 미끄럼베어링 200 : 모재100: sliding bearing 200: base material

300 : 금속혼합분말층 310 : 오일홈300: metal mixed powder layer 310: oil groove

400 : 형틀 410 : 상부펀치400: mold 410: upper punch

420 : 하부펀치 430 : 가이드부시420: lower punch 430: guide bush

450 : 코어 500 : 링롤링유닛450: core 500: ring rolling unit

510 : 샤프트 511 : 돌출턱510: shaft 511: protruding jaw

520 : 메인롤러 530 : 에지롤러520: main roller 530: edge roller

S100' : 모재내경 가공단계 S100 : 모재삽입단계S100 ': Base material diameter processing step S100: Base material insertion step

S200 : 금속혼합분말 공급단계 S300 : 금속혼합분말 가압단계S200: metal mixed powder supplying step S300: metal mixed powder pressurizing step

S400 : 반출단계 S500 : 소결단계S400: Export Step S500: Sinter Step

S600 : 재가압단계 S700 : 재소결단계S600: Repressurization S700: Resintering

F : 분말공급기F: Powder Feeder

본 발명은 미끄럼베어링 제조방법에 관한 것으로, 보다 상세하게는 모재와 금속혼합분말층의 접합강도 및 면압강도를 향상시켜 고하중 및 고강도용의 미끄럼베어링을 제조할 수 있도록 한 미끄럼베어링 제조방법에 관한 것이다.The present invention relates to a sliding bearing manufacturing method, and more particularly, to a sliding bearing manufacturing method to improve the bonding strength and the surface pressure strength of the base metal and the metal mixed powder layer to produce a sliding bearing for high loads and high strength. will be.

일반적으로, 미끄럼베어링은 베어링 면과 저널이 유막을 사이에 두고 미끄럼운동을 하는 기계요소로써, 중장비, 프레스, 사출기, 차량, 공작기계, 산업기계 등의 구동부위나 슬라이딩부위에 사용되어 축, 저널 또는 카운트 플레이트 등을 지지하는 역할을 한다.In general, sliding bearings are mechanical elements in which bearing surfaces and journals slide with oil film between them. They are used for driving or sliding parts of heavy equipment, presses, injection machines, vehicles, machine tools, industrial machines, etc. It serves to support the count plate and the like.

이러한, 미끄럼베어링은 부시형, 분할형, 플레이트형 등 다양한 형태로 이루어지게 되는데, 통상 강철이면금속으로 이루어진 모재에 동계 합금, 알루미늄계 합금, 구리-납계 합금, 동계 및 합성수지계 복합재 등의 금속혼합분말층이 접합되어 구성된다.Such sliding bearings are made of various shapes such as bush type, split type, plate type, and the like, and are usually mixed with metals such as copper alloys, aluminum alloys, copper-lead alloys, copper and synthetic resin composites in a base metal made of metal. The powder layer is joined.

도 1과 2는 상기한 미끄럼베어링 중에서 부시형의 미끄럼베어링(10)을 제조하는 방법의 일예를 나타낸 것으로, 크게 모재삽입단계(S10), 금속혼합분말 공급단계(S20), 금속혼합분말 가압단계(S30), 반출단계(S40), 소결단계(S50)로 구성된다.1 and 2 shows an example of a method of manufacturing a bush-type sliding bearing 10 of the above-described sliding bearing, largely the base material insertion step (S10), metal mixed powder supply step (S20), pressurized metal mixed powder step (S30), take out step (S40), sintering step (S50) is composed.

먼저, 모재삽입단계(S10)는 중앙에 코어(45)가 설치된 형틀(40) 내부에 모재(20)를 삽입하는 것으로, 상기 모재(20)는 형틀(40) 내측에 접촉되게 구비하고, 상기 모재(20) 상단의 형틀(40) 내측에는 가이드부시(43)를 장착한다. 그리고, 상기 모재(20) 하단에는 모재(20)를 지지하는 역할의 하부펀치(42)를 설치한다.First, the base material inserting step (S10) is to insert the base material 20 into the mold 40, the core 45 is installed in the center, the base material 20 is provided to be in contact with the mold 40, The guide bush 43 is mounted inside the mold 40 at the upper end of the base material 20. Then, the lower punch 42 of the role of supporting the base material 20 is installed at the bottom of the base material 20.

금속혼합분말 공급단계(S20)는 모재(20)와 접합되는 금속혼합분말을 투입하는 것으로, 상기 모재(20)와 코어(45) 사이에 조성되는 공간에 분말공급기(F)를 통하여 공급한다.The metal mixed powder supplying step (S20) is to put the metal mixed powder to be bonded to the base material 20, it is supplied through the powder feeder (F) to the space formed between the base material 20 and the core (45).

계속해서, 금속혼합분말 가압단계(S30)는 형틀(40)에 공급된 금속혼합분말을 가압하는 것으로, 상기 형틀(40) 상부에 위치한 상부펀치(41)를 하강시켜 금속혼합분말을 강한 힘으로 가압함으로써, 금속혼합분말층(30)을 성형한다.Subsequently, the metal mixed powder pressurizing step (S30) is to pressurize the metal mixed powder supplied to the mold 40, and lower the upper punch 41 located on the mold 40 to force the metal mixed powder with a strong force. By pressurizing, the metal mixed powder layer 30 is shape | molded.

반출단계(S40)는 모재(20)와 가압 성형된 금속혼합분말층(30)을 형틀에서 반출하는 단계로, 코어(45) 둘레에 설치된 하부펀치(42)를 상부로 밀어올려 상기 모재(20)와 금속혼합분말층(30)을 함께 상부로 반출하게 된다. 이 때, 모재(20) 상부에 장착되는 가이드부시(43)는 제거하게 된다.Carrying out step (S40) is a step of taking out the base metal 20 and the press-molded metal mixed powder layer 30 in the mold, by pushing the lower punch 42 installed around the core 45 to the upper portion of the base material 20 ) And the metal mixed powder layer 30 are taken out together. At this time, the guide bush 43 mounted on the base material 20 is removed.

소결단계(S50)는 금속혼합분말층(30)을 가열하여 모재(20)에 접착하는 것으로, 소결이 이루어져 결합된 모재(20)와 금속혼합분말층(30)은 추가적인 열처리 공정을 거쳐 미끄럼베어링(10)을 생산하게 된다.The sintering step (S50) is to heat the metal mixed powder layer 30 to adhere to the base material 20, the base material 20 and the metal mixed powder layer 30, which is sintered and bonded, are subjected to an additional heat treatment process and sliding bearing Will produce (10).

즉, 상기한 미끄럼베어링 제조방법은 분말성형방식을 통해 제품을 생산하는 제조방법의 특성상 원재료 이용률이 높고, 복잡한 형상의 제품 생산이 용이하며, 합금 조성과 특성의 균일화, 후가공비의 절감 및 대량생산을 통한 원가절감 등의 장점이 있는 것이다.That is, the above-mentioned sliding bearing manufacturing method has a high raw material utilization rate, easy to produce complex shaped products, uniform alloy composition and properties, reduction of post-processing cost, and mass production due to the characteristics of the manufacturing method for producing products through powder molding. There are advantages such as cost reduction through.

그러나, 상기한 종래의 미끄럼베어링 제조방법은 분말성형방식의 특성으로 인한 장점 뿐만 아니라 소재내 잔류하는 기공으로 인해 제품의 구성입자 밀도가 상대적으로 떨어지므로, 조직의 치밀성, 내마모성, 피로특성 등 기계적 성질이 저하되는 단점도 있었다.However, the above-described conventional sliding bearing manufacturing method is not only an advantage due to the characteristics of the powder molding method, but also a relatively low density of the constituent particles of the product due to the remaining pores in the material. There was also a disadvantage of this deterioration.

특히, 상기한 종래의 미끄럼베어링 제조방법은 금속혼합분말 가압단계에서 금속혼합분말층이 상, 하부분의 밀도편차와 저밀도로 성형되므로, 상기 금속혼합분말층의 면압강도가 현저하게 떨어지는 문제가 있고, 또한 한차례의 소결단계에서 모재와 금속혼합분말층이 접합되므로, 소재간 접합강도가 저하되는 문제도 있는 것이다. In particular, in the conventional sliding bearing manufacturing method, since the metal mixed powder layer is molded at a density deviation and a low density of the upper and lower portions in the metal mixed powder pressurizing step, there is a problem that the surface pressure strength of the metal mixed powder layer is remarkably decreased. In addition, since the base material and the metal mixed powder layer are joined in one sintering step, there is also a problem that the bonding strength between the materials is lowered.

따라서, 상기한 문제점으로 인해 종래의 제조방법으로 제조되는 미끄럼베어링은 고하중이나 고강도용으로는 사용하기 어려운 폐단이 있었다.Therefore, due to the above problems, the sliding bearing manufactured by the conventional manufacturing method has a closed end that is difficult to use for high load or high strength.

본 발명은 전술한 바와 같은 종래의 문제점을 해결하기 위하여 안출한 것으로, 모재와 접합되는 금속혼합분말층의 밀도를 향상시키고 그 접합강도를 향상시켜 고하중 및 고강도용의 미끄럼베어링을 제조할 수 있도록 한 미끄럼베어링 제조방법을 제공하는 데 있다.The present invention has been made to solve the conventional problems as described above, to improve the density of the metal mixed powder layer to be bonded to the base material and to improve the bonding strength to produce a sliding bearing for high loads and high strength A sliding bearing manufacturing method is provided.

본 발명의 다른 목적은 모재와 금속혼합분말의 가압 과정을 통해 오일홈을 형성하여 제조공정을 최소화 및 간소화할 수 있도록 한 미끄럼베어링 제조방법을 제공하는 데 있다.Another object of the present invention is to provide a sliding bearing manufacturing method that can minimize and simplify the manufacturing process by forming an oil groove through the pressurization process of the base material and the metal mixed powder.

상기와 같은 목적을 달성하기 위한 본 발명의 구성은, 중앙에 코어가 설치된 형틀 내부에 모재를 삽입하고 상기 코어와 모재 사이에 금속혼합분말을 공급하되, 상, 하부펀치로 상기 금속혼합분말을 가압 성형한 후 소결시켜 모재와 결합시키는 미끄럼베어링의 제조 방법에 있어서, 소결 결합된 모재와 금속혼합분말층의 상, 하면과 내, 외측면을 샤프트, 메인롤러, 에지롤러로 구성된 링롤링유닛을 통해 동시에 가압하는 재가압단계와; 상기 재가압된 모재와 금속혼합분말층을 다시 소결 가공하는 재소결단계를 포함하는 것을 특징으로 한다.The construction of the present invention for achieving the above object, while inserting the base material in the mold is installed inside the core in the center and supplying the metal mixture powder between the core and the base material, press the metal mixture powder in the upper, lower punch In the manufacturing method of the sliding bearing to be molded and sintered to bond with the base material, the upper, lower and inner and outer surfaces of the sintered base material and the metal mixed powder layer through a ring rolling unit consisting of a shaft, a main roller, and an edge roller Re-pressurizing step at the same time; And a resintering step of sintering the repressurized base material and the metal mixed powder layer again.

상기한, 재가압단계에서 링롤링유닛의 샤프트 외주면에는 다수의 돌출턱을 형성하여 금속혼합분말층 내측에 다수의 오일홈이 형성되게 한 것을 특징으로 한다.In the re-pressurization step, a plurality of protruding jaws are formed on the outer circumferential surface of the shaft of the ring rolling unit to form a plurality of oil grooves inside the metal mixed powder layer.

상기한 형틀에 모재를 삽입하기 이전에 모재의 내측면을 미세한 요철형태로 거칠게 가공하는 모재내경 가공단계를 더 포함하는 것을 특징으로 한다.Before inserting the base material in the mold is characterized in that it further comprises a base material inner diameter processing step of roughly processing the inner surface of the base material in a fine concavo-convex shape.

본 발명의 바람직한 실시예를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention.

도 3 내지 도 5는 본 발명의 미끄럼베어링 제조방법에 대한 것으로, 크게 모재내경 가공단계(S100'), 모재삽입단계(S100), 금속혼합분말 공급단계(S200), 금속혼합분말 가압단계(S300), 반출단계(S400), 소결단계(S500), 재가압단계(S600), 재소결단계(S700)로 구성된다.3 to 5 is for the sliding bearing manufacturing method of the present invention, largely the inner diameter processing step (S100 '), the base material inserting step (S100), metal mixed powder supply step (S200), metal mixed powder pressurizing step (S300) ), Carrying out step (S400), sintering step (S500), re-pressurization step (S600), resintering step (S700).

이하 도 3과 도 4를 통하여 설명하면, 먼저 모재내경 가공단계(S100')는 모 재(200)를 형틀(400)에 삽입하기 이전에 모재(200)의 내측면을 가공하는 것으로, 상기 모재(200)의 내측면을 미세한 요철 형태로 거칠게 가공 형성함으로써, 후술되는 금속혼합분말층(300)과의 결합력을 높일 수 있도록 하였다.3 and 4, first, the inner diameter of the base material processing step (S100 ') is to process the inner surface of the base material 200 before inserting the base material 200 into the mold 400, the base material By roughly forming the inner surface of the (200) in the form of fine concavo-convex, it is possible to increase the bonding force with the metal mixed powder layer 300 to be described later.

그리고, 모재삽입단계(S100)는 중앙에 코어(450)가 설치된 형틀(400) 내측에 모재(200)를 삽입하는 것으로, 상기 모재(200)는 형틀(400) 내측에 접촉 구비하고, 상기 모재(200) 상단의 형틀(400) 내측에는 가이드부시(430)를 장착하며, 상기 모재(200) 하단에는 모재(200)를 지지하는 역할의 하부펀치(420)를 설치한다.And, the base material inserting step (S100) is to insert the base material 200 inside the mold 400, the core 450 is installed in the center, the base material 200 is provided in contact with the mold 400, the base material A guide bush 430 is mounted inside the mold 400 at the upper end, and a lower punch 420 having a role of supporting the base 200 is installed at the bottom of the base 200.

계속해서, 금속혼합분말 공급단계(S200)는 상기 모재(200) 내측에 결합되는 금속혼합분말층(300)을 성형하기 위한 것으로, 상기 모재(200)와 코어(450) 사이의 공간에 분말공급기(F)를 이용하여 금속혼합분말을 공급한다. 이 때, 상기 금속혼합분말은 흑연, 구리, 니켈, 철이 혼합 조성된 것을 사용한다.Subsequently, the metal mixed powder supplying step (S200) is for molding the metal mixed powder layer 300 coupled to the inside of the base material 200, and a powder feeder is provided in the space between the base material 200 and the core 450. The metal mixed powder is supplied using (F). In this case, the metal mixed powder is used is a mixture of graphite, copper, nickel, iron.

다음으로, 금속혼합분말 가압단계(S300)는 모재(200)와 코어(450) 사이에 공급된 금속혼합분말을 가압하는 것으로, 상기 금속혼합분말을 가압하여 금속혼합분말층(300)을 예비 성형할 수 있도록 상기 형틀(400) 상부에 상부펀치(410)를 설치한다.Next, the metal mixed powder pressurizing step (S300) is to press the metal mixed powder supplied between the base material 200 and the core 450, and pressurizes the metal mixed powder to preform the metal mixed powder layer 300. The upper punch 410 is installed on the mold 400 so as to be possible.

반출단계(S400)는 가압 성형된 금속혼합분말층(300)과 모재(200)를 동시에 외부로 반출시키는 것으로, 형틀(400) 하단에 설치한 하부펀치(420)를 상부로 밀어올려 상기 금속혼합분말층(300)과 모재(200)를 반출시킨다. 이 때, 상기 모재(200) 상단에 구비되는 가이드부시(430)는 제거된다.Carrying out step (S400) is to simultaneously carry out the press-molded metal mixture powder layer 300 and the base material 200 to the outside, by pushing the lower punch 420 installed at the bottom of the mold 400 to the upper to the metal mixture The powder layer 300 and the base material 200 are carried out. At this time, the guide bush 430 provided on the top of the base material 200 is removed.

소결단계(S500)는 가압에 의해 성형된 금속혼합분말층(300)을 가열하여 모재 (200) 내측에 소결 접합하는 것으로, 불활성가스의 분위기에서 소결온도는 1050~1150℃에서 1~15분간 유지하는 것이 적절하다.Sintering step (S500) is to heat the metal mixed powder layer 300 formed by pressing to sinter bonding inside the base material 200, the sintering temperature is maintained for 1 to 15 minutes at 1050 ~ 1150 ℃ in the atmosphere of inert gas It is appropriate.

한편, 본 발명의 특징적인 구성인 재가압단계(S600)는 소결 결합된 모재(200)와 금속혼합분말층(300)의 상, 하면과 내, 외측면을 링롤링유닛(500)을 통해 동시에 재가압하는 것으로, 상기 링롤링유닛(500)은 샤프트(510), 메인롤러(520), 상, 하부의 에지롤러(530)로 구성된다.On the other hand, the re-pressurization step (S600) is a characteristic configuration of the present invention simultaneously the upper, lower and inner and outer surfaces of the base material 200 and the metal mixed powder layer 300 sintered through the ring rolling unit 500 Re-pressurizing, the ring rolling unit 500 is composed of a shaft 510, the main roller 520, the upper, lower edge roller 530.

도 4 및 도 5를 통하여 보다 상세하게 설명하면, 상기 샤프트(510)와 메인롤러(520)는 수직방향을 중심으로 각각 회전 가능하게 설치되고, 상기 샤프트(510)와 메인롤러(520) 사이에는 소결 접합된 모재(200)와 금속혼합분말층(300)이 가압 상태로 끼워진다. 4 and 5, the shaft 510 and the main roller 520 are rotatably installed in the vertical direction, respectively, between the shaft 510 and the main roller 520. The sintered base material 200 and the metal mixed powder layer 300 are fitted in a pressurized state.

즉, 샤프트(510) 외측에는 금속혼합분말층(300)의 내측이 가압 상태로 접촉되고, 메인롤러(520) 외측에는 모재(200)의 외측이 가압 상태로 접촉되므로, 상기 샤프트(510)와 메인롤러(520)에 의해 모재(200)와 금속혼합분말층(300)을 서로 가압할 수 있는 것이다. 이 때, 상기 샤프트(510) 외측에는 다수의 돌출턱(511)이 형성되므로, 샤프트(510) 외측에 접촉되는 금속혼합분말층(300) 내측에는 오일홈(310)을 형성할 수 있게 된다.That is, the inner side of the metal mixed powder layer 300 is in contact with the outer side of the shaft 510 in a pressurized state, and the outer side of the base material 200 is in contact with the outer side of the main roller 520 in a pressurized state. The main roller 520 may press the base material 200 and the metal mixed powder layer 300 to each other. At this time, since the plurality of protrusions 511 are formed on the outside of the shaft 510, the oil groove 310 may be formed inside the metal mixed powder layer 300 which is in contact with the outside of the shaft 510.

그리고, 상기 소결 접합된 모재(200)와 금속혼합분말층(300) 상면과 하면에는 원뿔 형태의 에지롤러(530)가 회전 가능하게 각각 설치된다. 즉, 상기 각각의 에지롤러(530)의 일면이 모재(200)와 금속혼합분말층(300)의 상면과 하면 상에 가압 상태로 접촉 회전하므로, 금속혼합분말층(300)의 상, 하면을 각각 가압할 수 있 는 것이다.The conical edge rollers 530 are rotatably installed on the upper and lower surfaces of the sintered base material 200 and the metal mixed powder layer 300, respectively. That is, since one surface of each of the edge rollers 530 rotates in contact with the upper surface and the lower surface of the base material 200 and the metal mixed powder layer 300 in a pressurized state, the upper and lower surfaces of the metal mixed powder layer 300 are rotated. Each can be pressurized.

계속해서, 재소결단계(S700)는 도 4와 같이 상기 재가압된 금속혼합분말층(300)을 다시 가열하여 모재(200)와의 결합력을 가일층 향상시키는 것으로, 이 때 불활성가스의 분위기에서 소결온도는 1050~1150℃에서 15~45분간 유지하는 것이 적절하다.Subsequently, the resintering step (S700) is to further heat the re-pressurized metal mixed powder layer 300 as shown in Figure 4 to further improve the bonding force with the base material 200, at this time the sintering temperature in the atmosphere of inert gas It is appropriate to keep 15 ~ 45 minutes at 1050 ~ 1150 ℃.

그리고, 이처럼 재소결단계(S700)를 거쳐 접착된 모재(200)와 금속혼합분말층(300)은 추가적인 열처리단계를 통하여 경도를 보다 향상시키는 것이 가능하고, 상기 열처리단계는 침탄, 질화, 또는 소려 등 다양한 열처리 방법이 적용 가능하다.Then, the base material 200 and the metal mixed powder layer 300 bonded through the resintering step (S700) can be further improved in hardness through an additional heat treatment step, and the heat treatment step is carburizing, nitriding, or thinning. Various heat treatment methods are applicable.

이와 같이 구성된 본 발명의 작용 및 효과를 상세하게 설명하면 다음과 같다.Referring to the operation and effect of the present invention configured as described in detail as follows.

본 발명의 미끄럼베어링 제조방법을 통하여 부시형의 미끄럼베어링(100)을 제조하기 위해서는 도 4와 같이 먼저 모재(200) 내측면을 미세한 요철 형태로 거칠게 가공한 후, 형틀(400) 내측에 접촉 구비되게 모재(200)를 삽입하고, 상기 모재(200) 상단에 가이드부시(430)를 삽입 장착하며, 상기 모재(200)와 코어(450) 사이에 조성되는 공간에 분말공급기(F)를 통하여 금속혼합분말을 공급한다.In order to manufacture the bush-type sliding bearing 100 through the sliding bearing manufacturing method of the present invention, after roughly processing the inner surface of the base material 200 in a fine concavo-convex shape as shown in FIG. 4, the contact member is provided inside the mold 400. Insert the base material 200, the guide bush 430 is inserted into the top of the base material 200, and the metal through the powder feeder (F) in the space formed between the base material 200 and the core 450 Feed the mixed powder.

그리고, 상기 형틀(400) 상단에 설치된 상부펀치(410)를 하강시켜 금속혼합분말을 강한 힘으로 가압한다. 이 때, 상기 형틀(400) 하단에는 모재(200)와 금속혼합분말을 지지하는 역할의 하부펀치(420)가 설치되므로, 상기 금속혼합분말을 가압하여 금속혼합분말층(300)을 성형할 수 있는 것이다.Then, by lowering the upper punch 410 installed on the top of the mold 400 to press the metal mixture powder with a strong force. At this time, since the lower punch 420 is provided at the bottom of the mold 400 to support the base material 200 and the metal mixed powder, the metal mixed powder layer can be formed by pressing the metal mixed powder. It is.

이 후에, 상기 상부펀치(410)를 승강시키고 하부펀치(420)를 상승시켜 상기 하부펀치(420)에 지지되는 모재(200)와 금속혼합분말층(300)을 동시에 반출하게 된다. 그리고, 반출된 모재(200)와 금속혼합분말층(300)을 가열하여 상기 모재(200)에 금속혼합분말층(300)을 소결 접착시킨다.Thereafter, the upper punch 410 is elevated and the lower punch 420 is raised to simultaneously carry out the base material 200 and the metal mixed powder layer 300 supported by the lower punch 420. Then, the carried out base metal 200 and the metal mixed powder layer 300 are heated to sinter the metal mixed powder layer 300 to the base material 200.

이처럼 소결 접착된 모재(200)와 금속혼합분말층(300)은 다시 링롤링유닛(500)을 통해 재가압하게 된다. 즉, 샤프트(510)와 메인롤러(520)를 통하여 모재(200)와 금속혼합분말층(300)의 내, 외측면을 각각 가압하는 동시에, 복수의 에지롤러(530)에 의해 금속혼합분말층(300)의 상, 하면을 각각 가압하는 것이다. The base material 200 and the metal mixed powder layer 300 sintered and bonded as described above are repressurized through the ring rolling unit 500. That is, the inner and outer surfaces of the base material 200 and the metal mixed powder layer 300 are pressed through the shaft 510 and the main roller 520, respectively, and the metal mixed powder layer is pressed by the plurality of edge rollers 530. The upper and lower surfaces of the 300 are respectively pressed.

이와 같은 가압 작용이 이루어지면 상기 샤프트(510)에는 다수의 돌출턱(511)이 형성되므로, 샤프트(510)에 가압되는 금속혼합분말층(300)의 내측면에는 다수의 오일홈(310)이 형성된다. 그리고, 상기 재가압 작용 이후에는 상기 모재(200)와 금속혼합분말층(300)을 다시 소결 가공하여 모재(200)와 금속혼합분말층(300)의 소결 접착력을 가일층 강화시키게 된다.When the pressing action is made, a plurality of protruding jaws 511 are formed on the shaft 510, and thus a plurality of oil grooves 310 are formed on the inner surface of the metal mixed powder layer 300 pressed on the shaft 510. Is formed. After the repressurization, the base material 200 and the metal mixed powder layer 300 are sintered again to further strengthen the sintering adhesion between the base material 200 and the metal mixed powder layer 300.

또한, 상기 재소결 단계를 거친 모재(200)와 금속혼합분말층(300)은 최종적인 열처리단계를 거쳐 고하중용의 미끄럼베어링(100)을 완성하게 된다.In addition, the base material 200 and the metal mixed powder layer 300, which have undergone the resintering, are completed through the final heat treatment step to complete the sliding bearing 100 for high load.

즉, 본 발명의 미끄럼베어링 제조방법은 가압 및 소결단계(S300)(S500)를 거친 모재(200)와 금속혼합분말층(300)을 링롤링유닛(500)을 통해 높이 방향과 직경 방향을 동시에 재가압하고 또한 다시 소결 가공함으로써, 미끄럼베어링(100)의 면압강도 및 접합강도를 가일층 향상시켜 고하중 및 고강도용의 부시형태의 미끄럼베어링(100)을 제조할 수 있는 것이다.That is, in the manufacturing method of the sliding bearing of the present invention simultaneously through the pressing and sintering step (S300) (S500) the base material 200 and the metal mixed powder layer 300 in the height direction and the radial direction through the ring rolling unit 500 By repressurizing and sintering again, it is possible to further improve the surface pressure strength and the bonding strength of the sliding bearing 100 to produce a bush-type sliding bearing 100 for high loads and high strength.

더욱이, 본 발명의 미끄럼베어링 제조방법은 금속혼합분말층(300)의 내측면을 가압하는 역할의 샤프트(510) 외측에 다수의 돌출턱(511)을 형성하므로, 제조 및 완성되는 미끄럼베어링(100) 내측에 오일이 저장되는 오일홈(310)을 형성하게 된다. 따라서, 부가적인 오일홈(310) 제조공정이 불필요하여 제품의 생산능률을 향상시킴과 아울러 제조공정 간소화에 따른 생산비용을 획기적으로 줄일 수 있는 것이다.Furthermore, the sliding bearing manufacturing method of the present invention forms a plurality of protruding jaws 511 on the outside of the shaft 510 which serves to press the inner surface of the metal mixed powder layer 300, thereby manufacturing and completing the sliding bearing 100 ) To form an oil groove 310 in which oil is stored. Therefore, the additional oil groove 310 manufacturing process is unnecessary, thereby improving the production efficiency of the product and significantly reducing the production cost due to the simplification of the manufacturing process.

뿐만 아니라, 본 발명의 미끄럼베어링 제조방법은 금속혼합분말층(300)과 접촉되는 모재(200)의 내측면을 미세한 요철 형태로 거칠게 가공함으로써, 상기 모재(200) 내측에 접착되는 금속혼합분말층(300)과의 마찰력을 높여 접합강도를 가일층 향상시킬 수 있도록 한 것이다.In addition, the sliding bearing manufacturing method of the present invention by roughly processing the inner surface of the base material 200 in contact with the metal mixed powder layer 300 in the form of fine irregularities, the metal mixed powder layer adhered to the inside of the base material 200 By increasing the frictional force with the (300) is to further improve the bonding strength.

한편, 본 발명은 상기한 구체적인 예에 대해서만 상세히 설명되었지만 본 발명의 기술사상 범위 내에서 다양한 변형 및 수정이 가능함은 당업자에게 있어서 명백한 것이며, 이러한 변형 및 수정이 첨부된 특허청구범위에 속함은 당연한 것이다.On the other hand, the present invention has been described in detail only with respect to the specific examples described above it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, it is natural that such variations and modifications belong to the appended claims. .

이상에서와 같이 본 발명은 가압 및 소결단계를 거친 모재와 금속혼합분말층을 링롤링유닛을 통해 상, 하면과 내, 외측면을 동시에 재가압하고 또한 다시 소결가공함으로써, 금속혼합분말층을 고밀도 성형하여 미끄럼베어링의 면압강도 및 접합강도를 향상시키고, 이에 따라 고하중 및 고강도용의 부시형태의 미끄럼베어링을 제조할 수 있는 효과가 있다.As described above, the present invention repressurizes the upper, lower, inner and outer surfaces of the base material and the metal mixed powder layer through the pressing and sintering at the same time through the ring rolling unit, and sinters the metal mixed powder layer at a high density. By molding, the surface pressure strength and the bonding strength of the sliding bearing are improved, and accordingly, there is an effect of manufacturing a bush-type sliding bearing for high load and high strength.

더욱이, 금속혼합분말층의 내측면을 가압하는 역할의 샤프트 외측에 다수의 돌출턱을 형성하므로, 제조 및 완성되는 미끄럼베어링 내측에 오일이 저장되는 오일홈을 형성하게 된다. 따라서, 부가적인 오일홈 제조공정이 불필요하여 제품의 생산능률을 향상시킴과 아울러 제조공정 간소화에 따른 생산비용을 획기적으로 줄일 수 있는 효과도 있다.Furthermore, since a plurality of protruding jaws are formed on the outer side of the shaft which presses the inner surface of the metal mixed powder layer, oil grooves for storing oil are formed inside the sliding bearings that are manufactured and completed. Therefore, the additional oil groove manufacturing process is unnecessary, thereby improving the production efficiency of the product and reducing the production cost by simplifying the manufacturing process.

뿐만 아니라, 금속혼합분말층과 접촉되는 모재의 내측면을 미세한 요철 형태로 거칠게 가공함으로써, 상기 모재 내측에 접착되는 금속혼합분말층과의 마찰력을 높여 접합강도를 가일층 향상시킬 수 있는 효과도 있는 것이다.In addition, by roughly processing the inner surface of the base material in contact with the metal mixed powder layer in the form of fine concavo-convex, the friction strength with the metal mixed powder layer adhered to the inside of the base material can be increased to further improve the bonding strength. .

Claims (3)

중앙에 코어가 설치된 형틀 내부에 모재를 삽입하고 상기 코어와 모재 사이에 금속혼합분말을 공급하되, 상, 하부펀치로 상기 금속혼합분말을 가압 성형한 후 소결시켜 모재와 결합시키고, 소결 결합된 모재와 금속혼합분말층의 상, 하면과 내, 외측면을 재가압하며, 상기 재가압된 모재와 금속혼합분말층을 다시 소결 가공하여 미끄럼베어링을 제조하는 방법에 있어서,Insert the base material inside the mold with the core installed in the center and supply the metal mixed powder between the core and the base material, and press and mold the metal mixed powder with upper and lower punches, and then sinter to combine with the base material, and the sintered base material In the method of manufacturing a sliding bearing by repressurizing the upper, lower, inner and outer surfaces of the metal mixed powder layer and the repressurized base material and the metal mixed powder layer. 상기 모재(200)와 금속혼합분말층(300)을 재가압하는 단계(S600)에서는 샤프트(510), 메인롤러(520), 에지롤러(530)로 구성된 링롤링유닛(500)을 통해 동시에 가압하는 것을 특징으로 하는 미끄럼베어링 제조방법.In the step S600 of repressurizing the base material 200 and the metal mixed powder layer 300, the shaft 510, the main roller 520, and an edge roller 530 are simultaneously pressed through the ring rolling unit 500. Sliding bearing manufacturing method characterized in that. 제 1항에 있어서, 상기 재가압단계(S600)에서 링롤링유닛(500)의 샤프트(510) 외주면에는 다수의 돌출턱(511)을 형성하여 금속혼합분말층(300) 내측에 다수의 오일홈(310)이 형성되게 한 것을 특징으로 하는 미끄럼베어링 제조방법.According to claim 1, In the re-pressurizing step (S600) a plurality of oil grooves in the metal mixture powder layer 300 by forming a plurality of protruding jaw 511 on the outer peripheral surface of the shaft 510 of the ring rolling unit 500 Sliding bearing manufacturing method characterized in that the 310 is formed. 제 1항에 있어서, 상기 형틀(400)에 모재(200)를 삽입하기 이전에 모재(200)의 내측면을 요철형태로 가공하는 모재내경 가공단계(S100')를 더 포함하는 것을 특징으로 하는 미끄럼베어링 제조방법.According to claim 1, Before inserting the base material 200 in the mold 400 further comprises a base material inner diameter processing step (S100 ') for processing the inner surface of the base material 200 in the form of irregularities Sliding Bearing Manufacturing Method.
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KR19980019316A (en) * 1997-04-19 1998-06-05 이우천 SLIDING BEARING AND MANUFACTURING METHOD THEREOF

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980019316A (en) * 1997-04-19 1998-06-05 이우천 SLIDING BEARING AND MANUFACTURING METHOD THEREOF

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