KR20040024778A - Making method of roller for roller bearing - Google Patents

Making method of roller for roller bearing Download PDF

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Publication number
KR20040024778A
KR20040024778A KR1020020056221A KR20020056221A KR20040024778A KR 20040024778 A KR20040024778 A KR 20040024778A KR 1020020056221 A KR1020020056221 A KR 1020020056221A KR 20020056221 A KR20020056221 A KR 20020056221A KR 20040024778 A KR20040024778 A KR 20040024778A
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South Korea
Prior art keywords
roller
pipe
cutting
heat treatment
roller bearing
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KR1020020056221A
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Korean (ko)
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김영기
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주식회사 스틸카스피
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Priority to KR1020020056221A priority Critical patent/KR20040024778A/en
Priority to CNB031024025A priority patent/CN1222701C/en
Publication of KR20040024778A publication Critical patent/KR20040024778A/en

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    • 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
    • C21D9/36—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for balls; for rollers
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • 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
    • C21D1/26—Methods of annealing
    • C21D1/28—Normalising
    • 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
    • C21D1/26—Methods of annealing
    • C21D1/30—Stress-relieving
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

PURPOSE: A manufacturing method of roller for roller bearing is provided to manufacture the roller through simple working process of cutting the drawn pipe shaped roller by passing the pipe shaped roller through drawing process after forming a long pipe shaped roller by passing a steel plate through pipe making operation. CONSTITUTION: In a method for manufacturing a roller for roller bearing by roughing and heat treating the cut product after cutting a round bar formed through casting operation to a certain size, the method comprises a pipe making process of butt welding the edge surface of the pipe after forming a circular steel sheet cut to a certain size into a pipe shape; drawing process of processing the steel pipe to dimensions of the roughing step correspondingly to applications by longitudinally drawing a long roller shaped steel pipe 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 specification of the roller bearing; and a heat treatment process of improving mechanical properties of the roller by QT heat treating the roller cut to a certain length through the cutting process, wherein the method comprises the normalizing heat treatment process for removing residual stress of a portion the edge surface of which is butt welded before the drawing process and after completing the pipe making process.

Description

롤러베어링용 롤러의 제조방법{Making method of roller for roller bearing}Making method of roller for roller bearing

본 발명은 에어컨의 일 구성요소인 컴프레셔(compressor)에 사용되는 롤러베어링의 롤러 제조방법에 관한 것으로, 더욱 상세하게는 충분한 경도(46~54HRC)를 지닌 철판을 이용하여 조관공정을 거쳐 파이프의 형태로 가공한 후 인발작업을 통해 사용용도에 적합한 일정 규격의 롤러를 제작하며 이 롤러를 제품길이에 맞춰 절단하는 간단한 작업공정으로 이루어져 제조원가 절감은 물론 생산성 향상 및 제품의 수명이 연장될 수 있도록 한 롤러베어링용 롤러의 제조방법에 관한 것이다.The present invention relates to a roller manufacturing method of a roller bearing used in a compressor (compressor), which is one component of an air conditioner, and more particularly, through a tubing process using an iron plate having a sufficient hardness (46 to 54 HRC). The roller is designed to produce rollers of a certain size suitable for the purpose of use by drawing and then cut the rollers according to the length of the product through drawing process to reduce the production cost, improve productivity and extend the life of the product. It relates to a manufacturing method of a roller for a bearing.

일반적으로 롤러베어링은 회전운동이나 또는 직선운동을 하는 축을 지지하는역할을 하는 것으로, 내부에 도 1과 같은 롤러(1)가 다수개 설치된다.In general, the roller bearing serves to support the axis of rotational movement or linear movement, and a plurality of rollers 1 as shown in FIG. 1 are installed therein.

상기 롤러(1)는 회전하는 원통형으로 이루어지고 미끄럼마찰(sliding friction)을 회전마찰로 바꾸어 주어 운동의 저항을 줄여주게 된다.The roller (1) is made of a rotating cylinder to reduce the sliding friction by changing the sliding friction (sliding friction) to rotational friction.

이러한 롤러(1)는 무엇보다 46~54HRC 정도의 충분한 경도를 지녀야만 내마모성을 유지하게 되나, 이 정도의 경도를 맞추기 위해서는 카본 함유량이 높은 재료를 사용하여야만 가능한 것이었다.Above all, the roller 1 has a sufficient hardness of about 46 to 54 HRC to maintain wear resistance, but in order to meet the hardness, it was possible to use a material having a high carbon content.

그러나 상대적으로 카본량이 늘어날 경우 용접이 불가능한 문제점이 야기되어 종래에는 롤러(1)의 제작방법을 전적으로 주물작업에 의존하고 있는 실정이다.However, when the amount of carbon increases relatively, the welding is not possible, and in the related art, the manufacturing method of the roller 1 is entirely dependent on the casting operation.

종래 주물작업에 의한 롤러(1)의 제조방법은 도 2에 도시된 공정도와 같이, 용해된 금속을 주형에 넣고 일정시간 응고시켜 롤러의 형태로 제작하는 주물공정과, 상기 주물공정을 거쳐 제작된 환봉을 치수에 알맞도록 절단하는 절단공정과, 상기 절단공정을 거쳐 치수에 알맞게 절단된 롤러를 롤러베어링의 특성에 알맞도록 선반가공하는 황삭공정과, 상기 황삭공정을 거친 롤러의 내마모성을 향상시키기 위해 QT열처리를 하는 열처리공정으로 이루어진다.The conventional method of manufacturing the roller 1 by the casting operation is a casting process for producing a roller in the form of a roller by putting molten metal into a mold and solidifying for a predetermined time, as shown in the process shown in FIG. In order to improve the wear resistance of the rollers subjected to the roughing process, a cutting process of cutting the round bar to the dimension, a roughing process of turning the roller cut to the dimension through the cutting process according to the characteristics of the roller bearing, It consists of a heat treatment process that performs QT heat treatment.

이러한 종래의 방법은 주물의 특성상 내부에 불순물이 함유되고 다수의 기공이 생성되어 내마모성이 저하되는 한편, 내마모성의 저하는 품질저하로 이어지는 것이었다.In the conventional method, due to the characteristics of the casting, impurities are contained therein and a large number of pores are generated to reduce wear resistance, while deterioration in wear resistance leads to deterioration in quality.

또한 주물생산 및 황삭가공으로 인해 많은 시간이 소요되어 생산성이 저하되고, 생산성 저하에 따른 원가상승은 피할 수 없는 심각한 문제점으로 대두되고 있는 것이었다.In addition, due to the casting production and roughing process, it takes a lot of time, resulting in a decrease in productivity, and a cost increase due to the decrease in productivity is inevitably a serious problem.

본 발명은 종래의 주물작업에 의존하여 롤러를 제조함에 따라 야기되는 문제점을 일소하기 위한 방안으로, 충분한 경도를 지닌 철판을 소재로 하여 조관작업을 통해 파이프 형태의 긴 롤러를 성형시킨 후 인발공정을 거쳐 롤러베어링의 규격에 알맞도록 절단시키는 간단한 작업공정을 통해 롤러를 제조할 수 있도록 하는 것이다.The present invention is to solve the problems caused by manufacturing a roller in accordance with the conventional casting work, to form a long roller in the form of a pipe through the pipe work with a steel plate having a sufficient hardness and then the drawing process Through the simple working process to cut to meet the specifications of the roller bearing to be able to manufacture the roller.

소기의 목적을 달성하기 위한 본 발명은 롤러베어링의 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 to find a technique using a steel sheet of S45C as a material capable of extinguishing the piping process by welding while having the minimum hardness (HRC) required by the characteristics of the roller bearing.

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, 제품에 불순물이 잔재하거나 기공이 발생되는 일이 없어 제품의 품질 향상은 물론 내구연한이 연장될 수 있게 된다.According to the present invention it is possible to build a mass production system by a simple work process, to improve the productivity by reducing the manufacturing cost and shorten the production time, there is no residual impurities or pores in the product product In addition to improving the quality of the durability can be extended.

도 1은 롤러베어링용 롤러의 일예시도1 is an exemplary view of a roller for roller bearings

도 2는 종래 롤러의 제조 공정도2 is a manufacturing process diagram of a conventional roller

도 3은 본 발명에 의한 롤러의 제조 공정도Figure 3 is a manufacturing process of the roller according to the present invention

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

1: 롤러1: roller

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 종래 롤러의 제조방법을 주물제작에 의존함에 따라 발생되는 문제점을 적극적으로 해소하기 위한 것으로, 원판을 긴 롤러의 형태로 조관한 후 사용용도에 알맞는 길이로 절단하여 롤러를 제조할 수 있게함을 특징적인 요지로 한다.The present invention is to solve the problems caused by the production of the conventional roller manufacturing method depend on the casting process of the first, after the original tube in the form of a long roller to cut the length to suit the intended use to manufacture the roller It is a characteristic gist that we can do it.

이러한 본 발명에 의한 롤러베어링용 롤러의 제조방법을 공정별로 상세하게 설명하면 다음과 같다.The manufacturing method of the roller bearing roller 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 롤러형태의 강관을 외경 다이스와 내경 플러그를 이용하여 출구쪽의 길이방향으로 당겨(인발하여) 최종 황삭단계의 치수(내, 외경 및 기계적성질)에 맞추어 가공한다.The roller-shaped steel pipe subjected to the normalizing heat treatment is pulled (drawn) in the longitudinal direction of the exit side using an outer diameter die and an inner diameter plug and processed to meet the dimensions (internal, outer diameter and mechanical properties) of the final roughing step.

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 롤러베어링의 규격에 맞추어 일정길이로 절단한다.The long length steel pipe completed through the drawing process is cut to a certain length according to the specifications of the product to be processed, that is, the roller bearing, by using a cutter.

4) 열처리공정4) Heat treatment process

절단공정을 거쳐 일정길이로 절단(인발공정 완료)된 롤러를 기계적성질을 개선하기 위해 QT열처리를 실시한다.QT heat treatment is performed to improve the mechanical properties of the rollers cut to a certain length through the cutting process (completed drawing process).

상기 열처리의 방법은 오스템퍼링에 의한 방법으로 실시하고 이 과정에서 최종 경도값을 만족시키게 되고 롤러의 내마모성을 향상시키는 역할을 수행하게 된다.The heat treatment method is performed by the method of ostampering and in this process satisfies the final hardness value and serves to improve the wear resistance of the roller.

한편 상기한 바와 같은 조관, 인발, 절단, 열처리공정을 포함하는 제조방법을 통해 롤러베어링용 롤러를 제조함에 있어서, 본 발명의 또 다른 핵심기술로는 롤러베어링의 특성상 반드시 롤러가 갖추어야 할 경도(HRC)를 구비하고, 동시에 용접작업이 가능하여 조관공정에 무리가 없는 소재의 원판을 제시한다.Meanwhile, in manufacturing a roller bearing roller through a manufacturing method including a tube, drawing, cutting, and heat treatment process as described above, another core technology of the present invention is a hardness (HRC) that a roller must necessarily have in view of the characteristics of the roller bearing. ), And at the same time the welding work is possible to present the original plate of the material that is not unreasonable in the piping process.

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 주물제작에 따른 불순물의 잔재 및 기공발생이 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 the quality and quality of the product can be remarkably improved as the remnants and porosity of impurities according to the conventional casting are solved.

한편 본 발명은 조관공정 →인발공정 →절단공정 →열처리공정의 4단계 공정을 거치면서 소망하는 롤러를 제조할 수 있음은 물론 인발공정을 제외한 조관공정→절단공정 →열처리공정의 3단계 공정을 통해서도 소망하는 롤러를 제조할 수 있는 것으로, 이 경우 조관공정에서 보다 정밀한 치수의 강관을 형성하므로써 인발공정을 거치지 않더라도 치수의 정밀도를 유지할 수 있도록 한다.On the other hand, the present invention can manufacture the desired roller through the four steps of the tube manufacturing process → drawing process → cutting process → heat treatment process, as well as through the three stage process of the tube manufacturing process → cutting process → heat treatment process except drawing process It is possible to manufacture a desired roller, in this case by forming a steel pipe of a more precise dimension in the tubing process it is possible to maintain the precision of the dimension without going through the drawing process.

본 발명은 간단한 작업공정에 의해 대량생산 체제를 구축할 수 있고, 제조원가의 절감 및 생산시간의 단축으로 인해 생산성을 향상시킬 수 있으며, 종래의 주물제품과 달리 제품에 불순물이 잔재하거나 기공이 발생되는 일이 없어 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, unlike the existing casting products, impurities or residual pores in the product There is no effect to improve the quality of the product as well as the durability can be improved.

Claims (7)

주물작업을 통해 성형된 환봉을 일정 치수로 절단한 후 절단된 제품을 황삭가공 및 열처리하여 롤러베어링의 롤러로 제조함에 있어서,In cutting the round bar formed by casting to a certain dimension and then roughing and heat-treating the cut product to produce a roller of the roller bearing, 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 롤러형태의 강관을 길이 방향으로 인발하여 사용용도에 맞게 황삭단계의 치수로 가공하는 인발공정과;A drawing process of drawing a long roller-shaped steel pipe that has undergone the pipe making process in the longitudinal direction and machining the steel tube of a roughing step according to a use purpose; 상기 인발공정을 거쳐 완료된 강관을 롤러베어링의 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 the roller bearing; 상기 절단공정을 거쳐 일정길이로 절단된 롤러를 QT열처리 하여 기계적성질을 개선하는 열처리공정을 포함하는 것을 특징으로 하는 롤러베어링용 롤러의 제조방법.And a heat treatment step of improving the mechanical properties by QT heat treatment of the roller cut to a predetermined length through the cutting process. 청구항 1에 있어서,The method according to claim 1, 조관공정을 위한 원판의 소재는 S45C 인 것을 특징으로 하는 롤러베어링용 롤러의 제조방법.The raw material for the raw material for the tube manufacturing process is a roller bearing roller manufacturing method, characterized in that S45C. 청구항 1에 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 롤러베어링용 롤러의 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 a roller for roller bearings, characterized in that the chemical composition of%. 청구항 1에 있어서,The method according to claim 1, 조관공정의 용접방식은 전기저항용접방식(ERW)으로 실시되는 것을 특징으로하는 롤러베어링용 롤러의 제조방법.The welding method of the tubing process is a roller bearing manufacturing method characterized in that the electrical resistance welding (ERW) is carried out. 청구항 1에 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 롤러베어링용 롤러의 제조방법.The method of manufacturing a roller bearing roller, characterized in that for performing the normalizing heat treatment to remove the residual stress of the welding portion facing the edge before the drawing process is completed. 청구항 1에 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 롤러베어링용 롤러의 제조방법.The heat treatment process is a roller bearing manufacturing method, characterized in that for performing an osmampling heat treatment for the improvement of mechanical properties such as the satisfaction of the final hardness value and improved wear resistance. 주물작업을 통해 성형된 환봉을 일정 치수로 절단한 후 절단된 제품을 황삭가공 및 열처리하여 롤러베어링의 롤러로 제조함에 있어서,In cutting the round bar formed by casting to a certain dimension and then roughing and heat-treating the cut product to produce a roller of the roller bearing, 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 롤러베어링의 규격에 맞춰 일정길이로 절단하는 절단공정과;A cutting step of cutting the steel pipe completed through the pipe manufacturing step to a predetermined length in accordance with the specifications of the roller bearing; 상기 절단공정을 거쳐 일정길이로 절단된 롤러를 QT열처리 하여 기계적성질을 개선하는 열처리공정을 포함하는 것을 특징으로 하는 롤러베어링용 롤러의 제조방법.And a heat treatment step of improving the mechanical properties by QT heat treatment of the roller cut to a predetermined length through the cutting process.
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KR100918612B1 (en) * 2007-11-20 2009-09-25 국방과학연구소 The manufacturing method for a flow formed pressure vessel using a thick plate preform prepared by welding
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CN110682059B (en) * 2019-10-11 2021-07-16 苏州新豪轴承股份有限公司 Processing method of needle roller chamfer and processing method of needle roller

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