KR20040039573A - Making method of in and out race and journal bearing for bearing - Google Patents

Making method of in and out race and journal bearing for bearing Download PDF

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Publication number
KR20040039573A
KR20040039573A KR1020020067685A KR20020067685A KR20040039573A KR 20040039573 A KR20040039573 A KR 20040039573A KR 1020020067685 A KR1020020067685 A KR 1020020067685A KR 20020067685 A KR20020067685 A KR 20020067685A KR 20040039573 A KR20040039573 A KR 20040039573A
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Prior art keywords
bearing
cutting
heat treatment
journal
journal bearing
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KR1020020067685A
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Korean (ko)
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KR100541720B1 (en
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김영기
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주식회사 스틸카스피
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Priority to KR1020020067685A priority Critical patent/KR100541720B1/en
Priority to CNB031025005A priority patent/CN100455834C/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • 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
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Rolling Contact Bearings (AREA)
  • Forging (AREA)

Abstract

PURPOSE: A method for manufacturing inner and outer races for bearing and journal bearing is provided to reduce manufacturing cost, improve productivity and extend life cycle of product by fabricating the inner and outer races and journal bearing having certain dimensions suitable for applications and cutting them correspondingly to length of the product. CONSTITUTION: In a method for manufacturing inner and outer races for bearing and journal bearing through cutting, forming, cold forging, turning and heat treatment processes using a work of billet, the method comprises a pipe making process of butt welding edge sides of the pipe shaped plate after forming an original plate properly cut to certain dimensions into a pipe shape; a drawing process of processing the steel pipe to dimensions of the roughing step correspondingly to applications by longitudinally drawing a steel pipe having a shape of long inner and outer races and journal bearing passing through the pipe making process; a cutting process of cutting the steel pipe completed through the drawing process to a certain length correspondingly to dimensions of the inner and outer races and journal bearing; and a heat treatment process of improving mechanical properties of the inner and outer races and journal bearing by quenching and tempering the inner and outer races and journal bearing cut to a certain length through the cutting process.

Description

베어링용 내,외측레이스 및 저어널베어링의 제조방법{Making method of in and out race and journal bearing for bearing}Manufacturing method of inner and outer race and journal bearing for bearings {Making method of in and out race and journal bearing for bearing}

본 발명은 베어링의 내,외측레이스 및 저어널베어링의 제조방법에 관한 것으로, 특히 충분한 경도를 지닌 철판을 소재로 하여 조관공정을 거쳐 파이프의 형태로 가공한 후 인발작업을 통해 사용용도에 적합한 일정 규격의 내,외측레이스 및 저어널베어링을 제작하며 이 내,외측레이스 및 저어널베어링을 제품길이에 맞춰 절단하는 간단한 작업공정으로 이루어져 제조원가 절감은 물론 생산성 향상 및 제품의 수명이 연장될 수 있도록 한 베어링용 내,외측레이스 및 저어널베어링의 제조방법에 관한 것이다.The present invention relates to a manufacturing method of the inner and outer races and journal bearings of the bearing, and in particular, a steel sheet having a sufficient hardness, and then processed in the form of a pipe through a tubing process, suitable for use by drawing work The inner and outer races and journal bearings of the standard are manufactured, and this simple work process cuts the inner and outer races and journal bearings to the length of the product to reduce the manufacturing cost, improve productivity and extend the life of the product. The present invention relates to a method for manufacturing inner and outer races for bearings and journal bearings.

일반적으로 베어링(1)은 회전운동이나 또는 직선운동을 하는 축을 지지하는 역할을 하는 것으로, 도 1과 같이 리테이너에 볼(2)이나 롤러 등이 끼워지고 상기 리테이너의 내,외측에는 원통형의 내,외측레이스(3)(4)가 설치된다.In general, the bearing (1) serves to support the axis of rotational movement or linear movement, as shown in Fig. 1, the ball (2) or rollers are fitted to the retainer and the inner, outer of the retainer cylindrical, The outer races 3 and 4 are provided.

또한 저어널(JOURNAL)베어링(5)은 별도의 볼이나 롤러 등이 끼워지지 않고 원통형 자체로 축을 지지하게 된다.In addition, the journal (JOURNAL) bearing (5) is not supported by a separate ball or roller is to support the shaft by the cylindrical itself.

이러한 베어링용 내,외측레이스(3)(4) 및 저어널베어링(5)은 무엇보다 60HRC 정도의 충분한 경도를 지녀야만 내마모성을 유지하게 되나, 이 정도의 경도를 맞추기 위해서는 카본 함유량이 높은 재료를 사용하여야만 가능한 것이었다.These inner and outer races for bearings (3) and journal bearings (5) maintain wear resistance only if they have sufficient hardness of about 60 HRC, but in order to meet this hardness, materials with high carbon content It was only possible to use.

그러나 상대적으로 카본량이 늘어날 경우 용접이 불가능한 또 다른 문제점이 야기된다.However, the relative increase in the amount of carbon causes another problem that is impossible to weld.

종래 이를 극복하기 위한 베어링용 내,외측레이스(3)(4) 및 저어널베어링(5)의 제조방법은 도 2에 도시된 공정도와 같이, 선재(billet)를 원소재로 하여 절단하는 절단과정과, 성형과정, 냉간단조과정, 선삭과정, 열처리과정으로 이루어진다.The manufacturing method of the inner and outer race (3) (4) and journal bearing (5) for the bearing to overcome the conventional is a cutting process of cutting the wire (billet) as the raw material, as shown in Figure 2 It consists of a molding process, cold forging process, turning process and heat treatment process.

이러한 종래의 방법은 불충분한 경도를 지녀 내마모성의 저하로 인해 품질이 떨어지는 문제점이 발생되고, 복잡한 작업공정으로 인해 많은 시간이 소요되어 생산성이 저하되며, 생산성 저하에 따른 원가상승은 피할 수 없는 심각한 문제점으로 대두되고 있는 것이었다.This conventional method has a problem of poor quality due to poor hardness due to insufficient hardness, a long time due to a complicated work process, productivity is lowered, and a cost increase due to productivity degradation is inevitable serious problem It was emerging.

본 발명은 상기와 바와 같은 제반 문제점을 일소하기 위한 방안으로, 충분한 경도를 지닌 철판을 소재로 하여 조관작업을 통해 파이프 형태의 긴 내,외측레이스및 저어널베어링을 성형시킨 후 인발공정을 거쳐 베어링의 규격에 알맞도록 절단시키는 간단한 작업공정을 통해 베어링용 내,외측레이스 및 저어널베어링을 제조할 수 있도록 하는 것이다.The present invention is to solve all the problems as described above, by forming a long inner, outer race and journal bearing in the form of a pipe through a tubing operation made of a steel plate having a sufficient hardness through the bearing process through the drawing process Through the simple work process to cut to meet the standard of the to be able to manufacture the inner and outer race and journal bearing for the bearing.

소기의 목적을 달성하기 위한 본 발명은 베어링용 내,외측레이스 및 저어널베어링의 특성상 요구되는 최소한의 경도(HRC)를 지닌 동시에 용접이 가능하여 조관공정을 소화할 수 있는 소재로서, S45C의 철판을 사용하는 기술을 강구한다.The present invention for achieving the desired object is a material capable of extinguishing the pipe making process with the minimum hardness (HRC) required at the same time due to the characteristics of the inner and outer race for bearings and journal bearings, and the welding, iron plate of S45C Seek to use technology.

또한 또 다른 소재로서 C-0.20~0.40wt%, Si-0.05이상wt%, Mn-0.7~1.8wt%, B-3ppm이상wt%, Ti- 0.005이상wt%, Cr-0.05이상wt%의 화학성분으로 이루어진 철판을 사용하는 기술을 강구한다.In addition, C-0.20 ~ 0.40wt%, Si-0.05wt%, Mn-0.7 ~ 1.8wt%, B-3ppmwt%, Ti-0.005wt%, Cr-0.05wt% Develop techniques for using steel plates made of components.

이러한 본 발명에 의하면 간단한 작업공정에 의해 대량생산 체제를 구축할 수 있고, 제조원가의 절감 및 생산시간의 단축으로 인해 생산성을 향상시킬 수 있으며, 충분한 경도를 지녀 내마모성이 뛰어나 제품의 품질 향상은 물론 내구연한이 연장될 수 있게 된다.According to the present invention, a mass production system can be established by a simple work process, productivity can be improved due to reduction of manufacturing cost and shortening of production time, and have sufficient hardness to provide excellent wear resistance, as well as durability of the product. The age can be extended.

도 1 은 일반적인 베어링의 평단면도 및 저어널베어링의 사시도1 is a sectional view of a general bearing and a perspective view of a journal bearing

도 2 는 종래 베어링용 내,외측레이스 및 저어널베어링의 제조 공정도Figure 2 is a manufacturing process of the inner, outer race and journal bearing for the conventional bearing

도 3 은 본 발명에 의한 제조 공정도3 is a manufacturing process diagram according to the present invention

[도면의 주요부분에 대한 부호의 설명][Explanation of symbols on the main parts of the drawings]

1: 베어링 3: 내측레이스 4: 외측레이스1: bearing 3: inner race 4: outer race

5: 저어널베어링5: journal bearing

이하, 본 발명의 목적을 효과적으로 달성할 수 있는 바람직한 실시예에 관해 상세하게 설명하기로 한다.Hereinafter, a preferred embodiment that can effectively achieve the object of the present invention will be described in detail.

본 발명은 무엇보다 종래의 제조방법에서 야기되는 경도저하 및 복잡한 작업공정의 문제점을 적극적으로 해소하기 위한 것으로, 원판을 긴 내,외측레이스 및저어널베어링의 형태로 조관한 후 사용용도에 알맞는 길이로 절단하여 베어링용 내,외측레이스 및 저어널베어링을 제조할 수 있게 함을 특징적인 요지로 한다.The present invention is intended to actively solve the problems of hardness and complex work process caused by the conventional manufacturing method, and it is suitable for use after the original plate in the form of long inner, outer race and journal bearing It is characterized by the fact that it is possible to manufacture inner and outer race and journal bearing for bearing by cutting to length.

이러한 본 발명에 의한 내,외측레이스 및 저어널베어링의 제조방법을 공정별로 상세하게 설명하면 다음과 같다.The manufacturing method of the inner and outer race and journal bearing according to the present invention will be described in detail for each process as follows.

1) 조관공정1) Tube making process

조관공정은 절단, 성형, 용접의 3단계로 구분되는 것으로, 우선 소정두께를 갖는 원판을 튜브(롤러)의 규격에 알맞도록 세절한 후 용접작업전 용접성을 보장하기 위한 목적으로 에지면 맞대기를 하기 위해 긴 파이프의 형태로 성형을 하며, 전기저항용접방식(ERW)으로 상기 에지면을 맞대기 하여 용접을 실시한다.The tubing process is divided into three stages: cutting, forming, and welding. First, a disk with a predetermined thickness is cut to meet the specifications of a tube (roller), and then the edges are welded to ensure weldability before welding. In order to form a long pipe to form, the electric resistance welding method (ERW) butt the edge surface is welded.

2) 인발공정2) drawing process

인발공정에 앞서, 상기 조관공정의 용접과정을 거친 긴 강관형태의 제품은 통상 용접부위에 잔류응력이 잔존하여 모재부보다 경도가 높게 된다. 따라서 이 잔류응력을 제거하기 위해 인발공정 이전에 노말라이징 열처리를 추가적으로 실시함이 바람직하다.Prior to the drawing process, the product of the long steel pipe form that has undergone the welding process of the tube manufacturing process, the residual stress is usually left in the welded portion is higher than the base material portion. Therefore, in order to remove this residual stress, it is preferable to additionally perform normalizing heat treatment before the drawing process.

노말라이징 열처리를 거친 내,외측레이스 및 저어널베어링 형태의 강관을 외경 다이스와 내경 플러그를 이용하여 출구쪽의 길이방향으로 당겨(인발하여) 최종 황삭단계의 치수(내, 외경 및 기계적성질)에 맞추어 가공한다.Inner and outer race and journal bearing type steel pipes subjected to normal heat treatment are pulled (drawn) in the longitudinal direction of the exit side using an outer diameter die and an inner diameter plug to the dimensions (inner, outer diameter and mechanical properties) of the final roughing step. Process it accordingly.

상기 인발의 목적은 기계적인 성질을 만족시키고, 치수의 정밀도를 향상시키며, 표면 상태를 개선하기 위해 실시하는 것이다.The purpose of the drawing is to fulfill the mechanical properties, to improve the precision of the dimensions, and to improve the surface condition.

3) 절단공정3) Cutting process

인발공정을 거쳐 완료된 긴 길이의 강관을 절단기를 이용하여 가공하고자 하는 제품, 즉 일반 베어링 및 저어널베어링의 규격에 맞추어 일정길이로 절단한다.The long length steel pipe completed through the drawing process is cut to a certain length in accordance with the specifications of the product to be processed using a cutter, that is, the general bearing and journal bearing.

4) 열처리공정4) Heat treatment process

절단공정을 거쳐 일정길이로 절단(인발공정 완료)된 내,외측레이스 및 저어널베어링을 기계적성질을 개선하기 위해 QT열처리를 실시한다.QT heat treatment is performed to improve the mechanical properties of inner and outer races and journal bearings that are cut to a certain length through the cutting process (completed drawing process).

상기 열처리의 방법은 오스템퍼링에 의한 방법으로 실시하고 이 과정에서 최종 경도값을 만족시키게 되며 내,외측레이스 및 저어널베어링의 내마모성을 향상시키는 역할을 수행하게 된다.The method of heat treatment is carried out by the method of ostampering and in this process satisfies the final hardness value and serves to improve the wear resistance of the inner and outer races and journal bearings.

한편 상기한 바와 같은 조관, 인발, 절단, 열처리공정을 포함하는 제조방법을 통해 베어링용 내,외측레이스 및 저어널베어링을 제조함에 있어서, 본 발명의 또 다른 핵심기술로는 베어링의 특성상 반드시 내,외측레이스 및 저어널베어링이 갖추어야 할 경도(HRC)를 구비하고, 동시에 용접작업이 가능하여 조관공정에 무리가 없는 소재의 원판을 제시한다.On the other hand, in the manufacturing of the inner, outer race and journal bearing for the bearing through the manufacturing method including the tube, drawing, cutting, heat treatment process as described above, another core technology of the present invention necessarily in the nature of the bearing, It has the hardness (HRC) that the outer race and journal bearing should have, and at the same time, the welding work is possible, so the original plate of the material which is not too troubled in the piping process is presented.

상기 조건을 만족하는 원판의 소재로는 S45C 의 철판이 적용된다.Iron plate of S45C is applied as a material of the original plate satisfying the above conditions.

또한 원판의 또 다른 소재로는 C-0.20~0.40wt%, Si-0.05이상wt%, Mn-0.7~1.8wt%, B-3ppm이상wt%, Ti- 0.005이상wt%, Cr-0.05이상wt%의 화학성분으로 이루어진 철판이 적용될 수 있게 된다.In addition, other materials of the disc include C-0.20 ~ 0.40wt%, Si-0.05wt%, Mn-0.7 ~ 1.8wt%, B-3ppmwtwt, Ti- 0.005wtwt, Cr-0.05wtwt Iron plates consisting of% chemical composition can be applied.

이러한 본 발명에 의하면 작업공정이 간단하고, 실제작 시간이 단축되며, 종래 제조방법에서 야기되는 불충분한 경도값으로 인한 내마모성 저하가 말끔이 해결됨에 따라 제품의 품질이 획기적으로 향상될 수 있게 된다.According to the present invention, the work process is simple, the actual working time is shortened, and as the wear resistance deterioration due to the insufficient hardness value caused by the conventional manufacturing method is completely solved, the quality of the product can be significantly improved.

한편 본 발명은 조관공정 →인발공정 →절단공정 →열처리공정의 4단계 공정을 거치면서 소망하는 내,외측레이스 및 저어널베어링을 제조할 수 있음은 물론 인발공정을 제외한 조관공정→절단공정 →열처리공정의 3단계 공정을 통해서도 소망하는 내,외측레이스 및 저어널베어링을 제조할 수 있는 것으로, 이 경우 조관공정에서 보다 정밀한 치수의 강관을 형성하므로써 인발공정을 거치지 않더라도 치수의 정밀도를 유지할 수 있도록 한다.Meanwhile, the present invention can manufacture desired inner and outer races and journal bearings through the four steps of the tube manufacturing process, the drawing process, the cutting process, and the heat treatment process. It is possible to manufacture desired inner and outer races and journal bearings through the three-step process of the process.In this case, by forming steel pipes with more precise dimensions in the pipe making process, it is possible to maintain the precision of the dimensions without the drawing process. .

본 발명은 간단한 작업공정에 의해 대량생산 체제를 구축할 수 있고, 제조원가의 절감 및 생산시간의 단축으로 인해 생산성을 향상시킬 수 있으며, 베어링이 갖추어야 할 충분한 경도를 지녀 내마모성이 우수하여 제품의 품질 향상은 물론 내구연한이 증진될 수 있는 효과가 있는 것이다.The present invention can establish a mass production system by a simple work process, improve productivity due to reduction of manufacturing cost and shortening of production time, and have sufficient hardness to be equipped with bearing, which is excellent in wear resistance and improves product quality. Of course, there is an effect that can be improved durability.

Claims (7)

선재(billet)를 원소재로 하여 절단, 성형, 냉간단조, 선삭, 열처리과정을 거쳐 베어링용 내,외측레이스 및 저어널베어링을 제조함에 있어서,In manufacturing inner and outer race for bearing and journal bearing through cutting, forming, cold forging, turning, heat treatment process using raw material as billet, 소정규격에 알맞게 절단된 원판을 파이프의 형태로 성형한 다음 에지면을 맞대기 하여 용접하는 조관공정과;A pipe forming step of forming a disc cut to conform to a predetermined standard in the form of a pipe, and then welding the edge surface by butting; 상기 조관공정을 거친 긴 내,외측레이스 및 저어널베어링 형태의 강관을 길이 방향으로 인발하여 사용용도에 맞게 황삭단계의 치수로 가공하는 인발공정과;A drawing process of drawing the inner and outer race and journal bearing steel pipes which have undergone the pipe forming process in the longitudinal direction and processing them to the size of the roughing step in accordance with the intended use; 상기 인발공정을 거쳐 완료된 강관을 내,외측레이스 및 저어널베어링의 규격에 맞춰 일정길이로 절단하는 절단공정과;A cutting step of cutting the steel pipe completed through the drawing process to a predetermined length in accordance with the specifications of inner and outer races and journal bearings; 상기 절단공정을 거쳐 일정길이로 절단된 내,외측레이스 및 저어널베어링을 QT열처리 하여 기계적성질을 개선하는 열처리공정을 포함하는 것을 특징으로 하는 베어링용 내,외측레이스 및 저어널베어링의 제조방법.And a heat treatment process for improving mechanical properties by QT heat treatment of the inner and outer races and journal bearings cut to a predetermined length through the cutting process. 청구항 1 에 있어서,The method according to claim 1, 조관공정을 위한 원판의 소재는 S45C 인 것을 특징으로 하는 베어링용 내,외측레이스 및 저어널베어링의 제조방법.The manufacturing method of the inner and outer race and journal bearing for the bearing, characterized in that the material of the disc for the tubing process is S45C. 청구항 1 에 있어서,The method according to claim 1, 조관공정을 위한 원판의 소재는 C-0.20~0.40wt%, Si-0.05이상wt%, Mn-0.7~1.8wt%, B-3ppm이상wt%, Ti- 0.005이상wt%, Cr-0.05이상wt%의 화학성분으로 이루어진 것을 특징으로 하는 베어링용 내,외측레이스 및 저어널베어링의 제조방법.The raw material of the disc for the tubing process is C-0.20 ~ 0.40wt%, Si-0.05wt%, Mn-0.7 ~ 1.8wt%, B-3ppmwt%, Ti-0.005wt%, Cr-0.05wtwt Method for producing inner and outer race for bearings and journal bearings, characterized in that the chemical composition of the%. 청구항 1 에 있어서,The method according to claim 1, 조관공정의 용접방식은 전기저항용접방식(ERW)으로 실시되는 것을 특징으로하는 베어링용 내,외측레이스 및 저어널베어링의 제조방법.The welding method of the tube manufacturing process is an electrical resistance welding method (ERW), characterized in that the manufacturing method of the inner and outer race for bearings and journal bearings. 청구항 1 에 있어서,The method according to claim 1, 조관공정 완료 후 인발공정의 이전에는 에지면을 맞대기 한 용접부위의 잔류응력을 제거하기 위한 노말라이징 열처리를 하는 것을 특징으로 하는 베어링용 내,외측레이스 및 저어널베어링의 제조방법.A method of manufacturing inner and outer races for bearings and journal bearings, characterized in that a normalizing heat treatment is performed to remove residual stresses on the welded portions facing the edges after completion of the drawing process. 청구항 1 에 있어서,The method according to claim 1, 열처리공정은 최종 경도값의 만족 및 내마모성 향상 등의 기계적 성질의 개선을 위한 오스템퍼링 열처리를 하는 것을 특징으로 하는 베어링용 내,외측레이스 및 저어널베어링의 제조방법.The heat treatment process is a manufacturing method of the inner, outer race and journal bearing for bearings, characterized in that the osmosis heat treatment for the improvement of mechanical properties such as the satisfaction of the final hardness value and the improvement of wear resistance. 선재(billet)를 원소재로 하여 절단, 성형, 냉간단조, 선삭, 열처리과정을 거쳐 베어링용 내,외측레이스 및 저어널베어링을 제조함에 있어서,In manufacturing inner and outer race for bearing and journal bearing through cutting, forming, cold forging, turning, heat treatment process using raw material as billet, 소정규격에 알맞게 절단된 원판을 파이프의 형태로 성형한 다음 에지면을 맞대기 하여 용접하는 조관공정과;A pipe forming step of forming a disc cut to conform to a predetermined standard in the form of a pipe, and then welding the edge surface by butting; 상기 조관공정을 거쳐 완료된 강관을 내,외측레이스 및 저어널베어링의 규격에 맞춰 일정길이로 절단하는 절단공정과;A cutting step of cutting the steel pipe completed through the pipe manufacturing process to a predetermined length in accordance with the specifications of inner and outer races and journal bearings; 상기 절단공정을 거쳐 일정길이로 절단된 내,외측레이스 및 저어널베어링을 QT열처리 하여 기계적성질을 개선하는 열처리공정을 포함하는 것을 특징으로 하는 베어링용 내,외측레이스 및 저어널베어링의 제조방법.And a heat treatment process for improving mechanical properties by QT heat treatment of the inner and outer races and journal bearings cut to a predetermined length through the cutting process.
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