KR20040067313A - Making method of crankshaft for compressor - Google Patents

Making method of crankshaft for compressor Download PDF

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Publication number
KR20040067313A
KR20040067313A KR1020030004356A KR20030004356A KR20040067313A KR 20040067313 A KR20040067313 A KR 20040067313A KR 1020030004356 A KR1020030004356 A KR 1020030004356A KR 20030004356 A KR20030004356 A KR 20030004356A KR 20040067313 A KR20040067313 A KR 20040067313A
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KR
South Korea
Prior art keywords
crank
shaft
crankshaft
pipe
welding
Prior art date
Application number
KR1020030004356A
Other languages
Korean (ko)
Inventor
김영기
Original Assignee
김영기
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.)
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Publication date
Application filed by 김영기 filed Critical 김영기
Priority to KR1020030004356A priority Critical patent/KR20040067313A/en
Priority to CNB031090656A priority patent/CN1228555C/en
Publication of KR20040067313A publication Critical patent/KR20040067313A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/08—Making machine elements axles or shafts crankshafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/10—Piercing billets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes

Abstract

PURPOSE: A manufacturing method of crank shaft for compressor is provided which builds mass production system by simple operation process, improves productivity by reduction of manufacturing cost and shortening of production time and improves quality and life cycle of product by improving abrasion resistance of the crank shaft. CONSTITUTION: The manufacturing method of crank shaft for compressor comprises a pipe forming process of butt welding edge surfaces of the pipe shaped steel sheet after forming a steel sheet appropriately cut to certain dimensions in a pipe shape; a drawing process of processing the shaft shaped steel pipe to dimensions of the roughing step according to purpose of use by longitudinally drawing a long shaft shaped steel pipe passing through the pipe forming process; a cutting process of completing a shaft part(11) by cutting a steel pipe completed by passing through the drawing process to a certain length correspondingly to dimensions of the crank shaft(10); a forging process of completing a crank part(12) by applying pressure to the partially heated crank part, thereby forming a crank(2) having desired dimensions and appearance after partially heating a round rod or pipe shaped crank part cut to a certain size to a certain temperature; a welding process of completing a crank shaft by integrally welding the shaft part and the crank part by an induction current method; a perforating process of perforating a movable hole(3) communicated with movable hole of the shaft part on the crank part passing through the welding process; and a turning processing process of finally turning processing the crank part passing through the perforating process and forming various key grooves on the crank part.

Description

압축기용 크랭크축의 제조방법{Making method of crankshaft for compressor}Manufacturing method of crankshaft for compressors

본 발명은 에어컨 및 냉장고의 일 구성요소인 컴프레셔(compressor)에 사용되는 크랭크축의 제조방법에 관한 것으로, 더욱 상세하게는 조관공정을 통해 철판을 파이프의 형태로 가공한 후 인발공정을 거쳐 일정 규격으로 제작한 축을 제품길이에 맞게 절단하여 축부(軸部)를 완성하는 한편 단조작업을 통해 완성된 크랭크부를 상기 축부(軸部)와 용접하여 최종적인 크랭크축을 완성하는 것을 특징적인 요지로 하는 압축기용 크랭크축의 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a crankshaft used in a compressor (compressor), which is one component of an air conditioner and a refrigerator, and more particularly, to a predetermined standard through a drawing process after the iron plate is processed in the form of a pipe through a tubing process. The crank for the compressor is characterized by cutting the manufactured shaft to the length of the product to complete the shaft portion, and welding the crank part completed by the forging operation with the shaft portion to complete the final crank shaft. It relates to a method for manufacturing a shaft.

일반적으로 크랭크축(crank shaft)은 왕복운동을 회전운동으로 바꾸어주는 역할을 하는 것으로, 도 1 과 같이 일측 소정위치에 커넥팅로드의 대단부가 결합되는 크랭크(2)가 형성되는 한편 상기 크랭크(2)의 외측에는 회전하는 원통형으로 이루어지고 미끄럼마찰(sliding friction)을 회전마찰로 바꾸어 주어 운동의 저항을 줄여주는 롤러가 끼워지며, 상기 크랭크축(1)의 전구간에 걸쳐 축 중심에는 냉매가 유동할 수 있는 유동홀(3)이 천공되는 구성으로 이루어진다.In general, the crank shaft (crank shaft) serves to change the reciprocating motion to the rotational movement, as shown in Figure 1 is formed with a crank (2) is coupled to the large end of the connecting rod at a predetermined position on one side while the crank (2) The outer side of the roller is made of a rotating cylindrical friction sliding (sliding friction) by rotating friction to reduce the resistance of the movement is fitted, the coolant can flow in the center of the shaft throughout the whole of the crankshaft (1) It consists of a configuration in which the flow hole 3 is drilled.

종래에는 이러한 크랭크축(1)의 제조방법을 전적으로 주물작업에 의존하는 것으로, 도 2 에 도시된 제조공정 블럭도와 같이 용해된 금속을 주형에 넣고 일정시간 응고시켜 크랭크축(마루봉)의 형태로 제작하는 주물공정과, 상기 주물공정을 거쳐 제작된 축의 양단을 고정시켜 선삭작업이 용이하게 하기 위해 축의 양단에 홈 가공을 하는 양단 홈가공공정과, 상기 양단홈가공을 거친 축을 선반가공하는 선삭공정과, 상기 선삭공정을 거친 환봉상태의 축을 건드릴을 이용하여 내경 규격에 맞춰 유동홀을 천공하는 천공공정과, 상기 천공공정을 거친 각종 축의 몸체를 가공(드릴구멍, 편심CUT, 기준 PIN홈 가공)하는 가공공정으로 이루어진다.Conventionally, the manufacturing method of such a crankshaft (1) is entirely dependent on the casting operation, the molten metal is put into a mold and solidified for a predetermined time as shown in the manufacturing process block diagram shown in Figure 2 in the form of a crankshaft (floor rod) In the casting process to manufacture, both end groove processing step of grooving at both ends of the shaft to fix both ends of the shaft produced through the casting process to facilitate the turning operation, and the turning process of lathe machining the shaft through the both end groove processing And a drilling process for drilling a flow hole in accordance with an inner diameter standard using a gun drill in the round bar state of the turning process, and processing a body of various shafts through the drilling process (drill hole, eccentric CUT, reference PIN groove processing) It consists of a machining process.

그러나 이러한 종래의 방법은 주물의 특성상 내부에 불순물이 함유되고 다수의 기공이 생성되어 내마모성이 저하되는 한편, 내마모성의 저하는 품질저하로 이어지는 것이었다.However, such a conventional method is that impurities are contained inside and many pores are generated due to the characteristics of the casting, which lowers the wear resistance, while lowering the wear resistance leads to deterioration in quality.

또한 주물생산 및 건드릴 천공작업, 선삭가공으로 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, the drilling and drilling work, turning process, a lot of time is required to reduce productivity, and the cost increase due to the productivity decrease is emerging as a serious problem.

상기와 같은 문제점을 해결하기 위한 방안으로 본 발명 출원인의 선출원 발명인 『발명특허출원 제000078호 명칭 크랭크축 및 모터축의 제조방법』이 제시되고 있는 것이었다.In order to solve the above problems, the present invention of the applicant of the present invention "Invention Patent Application No. 000078 name crankshaft and motor shaft manufacturing method" was proposed.

본 발명은 상기 선출원 발명에 연속되는 다른 실시예의 발명에 관한 것으로, 충분한 경도를 지닌 철판을 소재로 하여 조관공정을 통해 파이프 형태의 긴 축(shaft)을 성형시킨 후 인발공정을 거쳐 일정 규격의 축으로 제작하고 이 축을 제품길이에 맞게 절단하여 축부(軸部)를 완성하는 한편, 환봉이나 파이프를 소재로 하여 단조작업을 통해 크랭크를 성형시킨 크랭크부를 완성하고 상기 축부(軸部)와 크랭크부를 일체로 용접하여 크랭크축의 형태로 완성하는 한편 순차적으로 축부의 유동홀과 연통되게 동일한 직경으로 크랭크부에 유동홀을 천공하고 최종적으로 크랭크 부위를 선삭 및 각종 키홈 등을 가공하는 기술을 강구함으로써 간단한 작업공정을 통해 압축기용 크랭크축을 제조할 수 있게 함을 발명의 주된 목적으로 하는 것이다.The present invention relates to the invention of another embodiment that is continuous to the above-described invention, the shaft of a certain standard through the drawing process after forming a long shaft (shaft) in the form of a pipe through a tubing process from a steel plate having a sufficient hardness The shaft is cut to the length of the product to complete the shaft, while the crank is formed by forging by round rod or pipe, and the shaft and the crank are integrated. Welding process to complete the form of crankshaft, while drilling the flow hole in the crank with the same diameter in order to communicate with the flow hole of the shaft sequentially, and finally devising the technology of turning the crank part and processing various keyways, etc. Through the main purpose of the invention is to be able to manufacture a crankshaft for the compressor.

또한 본 발명은 환봉이나 파이프를 소재로 하여 단조작업을 통해 크랭크를성형하여 크랭크부를 완성함에 있어서, 크랭크부의 축중심에 일측이 개방된 형태의 끼움홀을 형성한 후 상기 축부(軸部)의 외측에 크랭크부의 끼움홀을 끼운 상태에서 축부와 크랭크부를 일체로 용접하여 크랭크축의 형태로 완성함으로써 추가적인 크랭크부의 유동홀 천공작업 공정을 생략한 채 최종적으로 크랭크 부위를 선삭 및 각종 키홈 등을 가공하는 또 다른 기술을 강구한다.In addition, the present invention in forming a crank by forming a crank through the forging operation by using a round bar or a pipe, the outer side of the shaft after forming a fitting hole of the open side on the shaft center of the crank part Another process of finally turning the crank part and processing various key grooves without omitting the additional flow hole drilling process of the crank part by welding the shaft part and the crank part integrally and completing the form of the crank shaft by inserting the crank part fitting hole into the crank part. Find skills.

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 종래 크랭크축의 제조공정을 나타낸 사시도1 is a perspective view showing a manufacturing process of a conventional crankshaft

도 2 는 종래 크랭크축의 제조공정 블럭도2 is a manufacturing process block diagram of a conventional crankshaft

도 3 은 본 발명에 의한 크랭크축의 제조공정을 나타낸 사시도Figure 3 is a perspective view showing a manufacturing process of the crankshaft according to the present invention

도 4 는 본 발명에 의한 크랭크축의 제조공정 블럭도Figure 4 is a block diagram of the manufacturing process of the crankshaft according to the present invention

도 5 는 본 발명 다른 실시예에 의한 크랭크축의 제조공정을 나타낸 사시도Figure 5 is a perspective view showing a manufacturing process of the crankshaft according to another embodiment of the present invention

도 6 은 본 발명 다른 실시예에 의한 크랭크축의 제조공정 블럭도6 is a block diagram of the manufacturing process of the crankshaft according to another embodiment of the present invention.

도 7 은 본 발명 또 다른 실시예에 의한 크랭크축의 제조공정을 나타낸 사시도Figure 7 is a perspective view showing a manufacturing process of the crankshaft according to another embodiment of the present invention

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

1,10,20,30: 크랭크축 2: 크랭크 3: 유동홀1,10,20,30: Crankshaft 2: Crank 3: Flow hole

11,12: 축부(軸部) 12,22: 크랭크부 23: 끼움홀11, 12: shaft portion 12, 22: crank portion 23: fitting hole

본 발명의 바람직한 실시예의 구성을 첨부된 도면에 의거 상세하게 설명하면 다음과 같다.Referring to the configuration of the preferred embodiment of the present invention in detail as follows.

본 발명은 무엇보다 종래 주물 제조방법에 의존함에 따라 야기되는 품질저하(기공발생, 내마모성저하) 및 긴 축에 드릴을 사용하여 냉매가 흐를 수 있도록 유동홀(3)을 천공하는 복잡한 작업공정의 문제점을 적극적으로 해소하기 위한 것으로, 원판을 긴 축(shaft)의 형태로 조관한 후 인발공정을 거쳐 일정 규격으로 제작한 축을 제품길이에 맞게 절단하여 축부(軸部)를 완성하는 한편 단조작업을 통해 완성된 크랭크부를 상기 축부(軸部)와 일체로 용접하여 크랭크축을 제조할 수 있게 함을 특징적인 요지로 한다.The present invention is a problem of the complicated work process of drilling the flow hole 3 so that the refrigerant flows by using a drill on the long axis and the quality (porosity, wear resistance decrease) caused by the conventional casting manufacturing method This is to actively solve the problem. After assembling the disc in the form of a long shaft, the shaft is cut to a certain length through the drawing process to complete the shaft part, and forging It is a characteristic gist of the completed crank part to be welded integrally with the said shaft part to manufacture a crankshaft.

이러한 본 발명에 의한 크랭크축의 제조방법을 세부 공정별로 상세하게 설명하면 다음과 같다.The method for manufacturing a crankshaft according to the present invention will be described in detail for each step as follows.

1) 조관공정1) Tube making process

조관공정은 절단, 성형, 용접의 3단계로 구분되는 것으로, 우선 소정두께를 갖는 원판을 튜브(크랭크축)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 disc with a predetermined thickness is cut to meet the specifications of a tube (crankshaft). In order to form a long pipe to form, the electric resistance welding method (ERW) butt the edge surface to perform welding.

이러한 본 발명의 조관공정에 의하면 자동적으로 크랭크축(10)의 축 중심부에 길이방향 전구간에 걸쳐 유동홀(3)이 형성되므로써 종래 크랭크축의 제조방법에서 유동홀(3)을 가공하기 위해 별도의 천공작업을 실시하는 것과 같은 번거로움은 말끔이 해소될 수 있게 된다.According to the tube manufacturing process of the present invention, since the flow hole 3 is automatically formed in the center of the shaft of the crankshaft 10 over the entire longitudinal direction, a separate perforation for processing the flow hole 3 in the conventional crankshaft manufacturing method. The hassle of doing work can be eliminated.

즉 조관공정시 자연적으로 축중심에는 냉매가 유동할 수 있는 유동홀(3)이 형성되는 것이다.That is, the flow hole (3) through which the refrigerant flows is naturally formed in the shaft center during the tubing process.

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 소둔(어닐링) 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 perform annealing (annealing) heat treatment before the drawing process.

노말라이징 열처리를 거친 긴 축(shaft)(크랭크축) 형태의 강관을 외경 다이스와 내경 플러그를 이용하여 출구쪽의 길이방향으로 당겨(인발하여) 최종 황삭단계의 치수(내, 외경 및 기계적성질)에 맞추어 가공한다.The length of the final roughing step (inner, outer diameter and mechanical properties) is drawn by pulling (drawing) a long shaft (crankshaft) shaped steel pipe subjected to normal heat treatment in the longitudinal direction of the outlet side using an outer diameter die and an inner diameter plug. Machining according to

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 크랭크축의 규격에 맞추어 일정길이로 절단하여 축부(軸部)를 완성한다.The long length steel pipe completed through the drawing process is cut to a certain length in accordance with the specification of the product to be processed, that is, the crankshaft by using a cutter to complete the shaft portion.

이러한 상기의 조관공정 →인발공정 →절단공정은 본 발명의 크랭크축(10)의 일구성 요소인 축부(11)를 완성하기 위한 공정이다.The above pipe forming step → drawing step → cutting step is a step for completing the shaft portion 11, which is one component of the crankshaft 10 of the present invention.

4) 단조공정4) Forging process

단조공정은 상기 축부(11)와 일체로 접합되어 크랭크축(10)을 구성하는 크랭크부(12)를 완성하기 위한 것으로, 일정길이로 절단된 환봉이나 파이프의 소정위치(크랭크 성형부위)에 롤러가 외삽되는 한편 커넥팅로드의 대단부가 결합되는 크랭크(2)를 성형시킨다.The forging process is for completing the crank part 12 which is integrally bonded to the shaft part 11 and constitutes the crankshaft 10. The roller is placed at a predetermined position (crank forming part) of the round bar or pipe cut to a certain length. Is extrapolated while forming the crank 2 to which the large end of the connecting rod is coupled.

상기 크랭크(2)의 성형방법은 일정길이로 절단된 축의 크랭크부위를 일정한 온도로 국부가열한 다음 압력을 가하여 원하는 규격 및 모양으로 성형한다.In the method of forming the crank 2, the crank portion of the shaft cut to a predetermined length is locally heated to a constant temperature and then pressurized to form a desired specification and shape.

5) 용접공정5) welding process

조관공정 →인발공정 →절단공정을 거쳐 완성된 축부(11)와, 단조공정을 거쳐 완성된 크랭크부(12)를 상호 맞댄 상태에서 유도 전류방식에 의해 일체로 접합하여 크랭크축(10) 형태로 완성한다.The shaft portion 11, which has been completed through the tubing process → drawing process → cutting process, and the crank portion 12 that has been completed through the forging process, are integrally joined by an induction current method in the state of mutual contact with each other in the form of a crank shaft 10. Complete

6) 천공공정6) drilling process

상기 용접공정을 거쳐 완성된 크랭크축(10)은 축부(11)의 경우 유동홀(3)이 형성되었지만 크랭크부(12)는 환봉을 소재로 하였을 경우 유동홀(3)이 존재하지 않으며, 파이프를 소재로 하였을 경우에는 단조과정에서 유동홀(3)이 막히게 된다.The crankshaft 10 completed through the welding process has a flow hole (3) is formed in the case of the shaft portion 11, but the crank portion (12) does not have a flow hole (3) when the round bar is made of a material, the pipe In the case of using the material, the flow hole 3 is blocked in the forging process.

따라서 상기 크랭크부(12)에는 축부(11)의 유동홀(3)과 연통되게 동일한 직경으로 유동홀(3)을 천공한다.Therefore, the crank portion 12 drills the flow hole 3 with the same diameter so as to communicate with the flow hole 3 of the shaft portion 11.

7) 선삭 가공공정7) Turning process

상기 용접공정을 거쳐 완성된 크랭크축(10)의 접합부위에는 용접비드가 발생되므로 이를 제거함은 물론 크랭크(2) 부위의 정밀도를 향상시키기 위해 최종적으로 선삭을 실시하고, 각종 키홈 등을 가공하도록 한다.Since the welding bead is generated in the joint portion of the crankshaft 10 completed through the welding process, as well as to remove this, and finally to improve the precision of the crank (2) site to perform a variety of key grooves and the like.

이러한 본 발명에 의하면 작업공정이 간단하고, 실제작 시간이 단축되며, 종래 주물 제조방법에서 야기되는 기공생성으로 인한 내마모성 저하가 말끔이 해결됨에 따라 제품의 품질 및 생산성이 획기적으로 향상될 수 있게 된다.According to the present invention, the work process is simple, the actual working time is shortened, and the wear resistance due to the pore generation caused by the conventional casting manufacturing method is completely solved, so that the quality and productivity of the product can be significantly improved. .

한편 본 발명은 상기와 같이 조관공정 →인발공정 →절단공정 →단조공정 →용접공정 →천공공정 →선삭 가공공정의 7단계 공정을 거치면서 소망하는 크랭크축(10)을 제조할 수 있음은 물론 도 6의 다른 제조공정 블럭도와 같이 천공공정을 생략한 채 조관공정 →인발공정 →절단공정 →단조공정 →용접공정 →선삭 가공공정의 6단계 공정을 통해서도 소망하는 크랭크축(20)을 제조할 수 있는 것이다.Meanwhile, the present invention can manufacture the desired crankshaft 10 while going through the seven steps of the pipe forming process, the drawing process, the cutting process, the forging process, the welding process, the drilling process, and the turning process as described above. As shown in the other manufacturing process block diagram in Fig. 6, the desired crankshaft 20 can be manufactured through the six steps of the pipe forming process, the drawing process, the cutting process, the forging process, the welding process, and the turning process, without the drilling process. will be.

이 경우 단조공정을 통해 크랭크(2)를 성형함에 있어 이와 동시에 크랭크부(22)의 축중심에는 도 5와 같이 일측이 개방된 형태의 끼움홀(23)을 성형하여 크랭크부(22)를 완성하도록 한다.In this case, in forming the crank 2 through the forging process, at the same time, the fitting hole 23 of one side is opened in the shaft center of the crank part 22 to form the crank part 22, thereby completing the crank part 22. Do it.

상기와 같이 크랭크부(22)의 축중심에 끼움홀(23)이 완성되면 축부(21)의 외측에 크랭크부(22)의 끼움홀(23)을 끼운 상태에서 축부(21)와 크랭크부(22)를 유도 전류방식에 의해 일체로 접합하여 크랭크축(20)을 완성한다.When the fitting hole 23 is completed in the shaft center of the crank part 22 as described above, the shaft part 21 and the crank part (with the fitting hole 23 of the crank part 22 inserted in the outer side of the shaft part 21) 22) is integrally joined by an induction current method to complete the crankshaft 20.

따라서 축부(21)의 외측에 크랭크부(22)가 일체로 접함됨에 따라 추가적으로 크랭크부(20)에 유동홀(3)을 천공하는 천공공정이 필요치 않게 된다. 그러므로 용접공정을 거쳐 완성된 크랭크축은 천공공정을 생략한 상태에서 곧 바로 선삭 가공공정으로 연계될 수 있어 작업공정을 보다 간소화시킬 수 있게 된다.Therefore, as the crank part 22 is integrally in contact with the outer side of the shaft part 21, the drilling process for drilling the flow hole 3 in the crank part 20 is not necessary. Therefore, the crankshaft completed through the welding process can be directly linked to the turning process in the state of omitting the drilling process, thereby simplifying the work process.

한편 이상에서 언급한 본 발명의 크랭축은 에어컨에 사용되는 압축기용 크랭크축에 관한 것이며, 도 7은 본 발명의 또 다른 실시예로 냉장고에 사용되는 압축기용 크랭크축(30)에 관한 것으로 이에 대한 제조방법은 에어컨용과 동일하며 단지, 크랭크축(30)의 형상만이 상이할 뿐이다.Meanwhile, the crankshaft of the present invention mentioned above relates to a crankshaft for a compressor for use in an air conditioner, and FIG. 7 relates to a crankshaft for a compressor for use in a refrigerator according to another embodiment of the present invention. The method is the same as for the air conditioner, only the shape of the crankshaft 30 is different.

본 발명은 간단한 작업공정에 의해 대량생산 체제를 구축할 수 있고, 제조원가의 절감 및 생산시간의 단축으로 인해 생산성을 향상시킬 수 있으며, 종래의 주물제조방법과 달리 내부에 불순물이 함유되지 않고 기공이 생성되지 않아 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 unlike the conventional casting manufacturing method, the pores are not contained inside and do not contain impurities. Since it is not produced, the wear resistance is excellent, so that the quality of the product as well as the durability can be improved.

Claims (5)

주물작업을 통해 성형된 크랭크축 형태의 환봉 양단에 홈을 가공한 후 선반가공 및 천공작업을 거쳐 최종적으로 축의 몸체를 가공하여 크랭크축을 제조함에 있어서,In manufacturing the crankshaft by machining grooves on both ends of the round bar in the form of crankshaft formed by casting, and then machining the body of the shaft through lathe processing and drilling. 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 축(shaft) 형태의 강관을 길이 방향으로 인발하여 사용용도에 맞게 황삭단계의 치수로 가공하는 인발공정과;A drawing process of drawing a steel tube having a shaft shape through the pipe forming process in a lengthwise direction and machining the steel pipe having a roughing step according to a use purpose; 상기 인발공정을 거쳐 완료된 강관을 크랭크축의 규격에 맞춰 일정길이로 절단하여 축부(軸部)를 완성하는 절단공정과;A cutting step of cutting the steel pipe completed through the drawing process to a predetermined length in accordance with the specification of the crankshaft to complete the shaft portion; 일정길이로 절단된 환봉이나 파이프의 크랭크부위를 일정한 온도로 국부가열한 다음 압력을 가하여 원하는 규격 및 모양의 크랭크를 성형하여 크랭크부를 완성하는 단조공정과;A forging step of locally heating the crank portion of the round bar or pipe cut to a certain length to a constant temperature and then applying pressure to form a crank of a desired specification and shape; 상기 축부(軸部)와 크랭크부를 유도 전류방식에 의해 일체로 접합하여 크랭크축의 형태로 완성하는 용접공정과;A welding step in which the shaft portion and the crank portion are integrally joined by an induction current method and completed in the form of a crank shaft; 상기 용접공정을 거친 크랭크부에 축부(軸部)의 유동홀과 연통되는 유동홀을 천공하는 천공공정과;A drilling step of drilling a flow hole communicating with the flow hole of the shaft portion through the crank portion subjected to the welding process; 상기 천공공정을 거친 크랭크 부위를 최종적으로 선삭 및 각종 키홈 등을 가공하는 선삭 가공공정을 포함하는 것을 특징으로 하는 압축기용 크랭크축의 제조방법.And a turning processing step for finally turning the crank part subjected to the drilling process and processing various key grooves, and the like. 청구항 1 에 있어서,The method according to claim 1, 조관공정의 용접방식은 전기저항용접방식(ERW)으로 실시하는 것을 특징으로하는 압축기용 크랭크축의 제조방법.The welding method of the tube manufacturing process is a method of manufacturing a crankshaft for a compressor, characterized in that the electric resistance welding (ERW). 청구항 1 에 있어서,The method according to claim 1, 조관공정 완료 후 인발공정의 이전에는 에지면을 맞대기 한 용접부위의 잔류응력을 제거하기 위한 소둔(어닐링) 열처리를 하는 것을 특징으로 하는 압축기용 크랭크축의 제조방법.A method of manufacturing a crankshaft for a compressor, characterized in that the annealing (annealing) heat treatment is performed to remove the residual stress of the welded portions facing the edges after completion of the drawing process. 주물작업을 통해 성형된 크랭크축 형태의 환봉 양단에 홈을 가공한 후 선반가공 및 천공작업을 거쳐 최종적으로 축의 몸체를 가공하여 크랭크축을 제조함에 있어서,In manufacturing the crankshaft by machining grooves on both ends of the round bar in the form of crankshaft formed by casting, and then machining the body of the shaft through lathe processing and drilling. 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 축(shaft) 형태의 강관을 길이 방향으로 인발하여 사용용도에 맞게 황삭단계의 치수로 가공하는 인발공정과;A drawing process of drawing a steel tube having a shaft shape through the pipe forming process in a lengthwise direction and machining the steel pipe having a roughing step according to a use purpose; 상기 인발공정을 거쳐 완료된 강관을 크랭크축의 규격에 맞춰 일정길이로 절단하여 축부(軸部)를 완성하는 절단공정과;A cutting step of cutting the steel pipe completed through the drawing process to a predetermined length in accordance with the specification of the crankshaft to complete the shaft portion; 일정길이로 절단된 환봉이나 파이프의 크랭크부위를 일정한 온도로 국부가열한 다음 압력을 가하여 원하는 규격 및 모양의 크랭크를 성형하는 동시에 축중심에 일측이 개방된 형태의 끼움홀을 성형하여 크랭크부를 완성하는 단조공정과;Locally heat the crank part of the round bar or pipe cut to a certain length to a certain temperature, and apply pressure to form a crank of the desired size and shape, and at the same time, form a fitting hole with one side open to the shaft center to complete the crank part. Forging process; 상기 축부(軸部)의 외측에 크랭크부의 끼움홀을 끼운 상태에서 축부(軸部)와 크랭크부를 유도 전류방식에 의해 일체로 접합하여 크랭크축의 형태로 완성하는 용접공정과;A welding step of integrally joining the shaft portion and the crank portion by an inductive current method to complete the crankshaft in a state where the crank portion fitting hole is inserted outside the shaft portion; 상기 용접공정을 거친 크랭크 부위를 최종적으로 선삭 및 각종 키홈 등을 가공하는 선삭 가공공정을 포함하는 것을 특징으로 하는 압축기용 크랭크축의 제조방법.And a turning processing step of finally turning the crank part subjected to the welding process and processing various key grooves. 청구항 4 에 있어서,The method according to claim 4, 크랭크부는 축중심에 성형된 끼움홀을 축부(軸部)의 외측에 끼운 상태에서 일체로 접합함으로써 추가적으로 크랭크부에 유동홀을 천공하는 천공공정을 생략한 채 선삭 가공공정으로 연계되는 것을 특징으로 하는 압축기용 크랭크축의 제조방법.The crank part is integrally joined in the state in which the fitting hole formed at the center of the shaft is integrally connected to the outer side of the shaft part, so that the crank part is linked to the turning process without omitting the drilling step of drilling the flow hole in the crank part. Method for manufacturing a crankshaft for a compressor.
KR1020030004356A 2003-01-22 2003-01-22 Making method of crankshaft for compressor KR20040067313A (en)

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KR1020030004356A KR20040067313A (en) 2003-01-22 2003-01-22 Making method of crankshaft for compressor
CNB031090656A CN1228555C (en) 2003-01-22 2003-04-03 Method for mfg of eccentral rotary axle of compressor

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KR1020030004356A KR20040067313A (en) 2003-01-22 2003-01-22 Making method of crankshaft for compressor

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101128579B1 (en) * 2005-01-26 2012-03-27 엘지전자 주식회사 A manufacturing process of crank shaft for a rotary compressor
KR20160147327A (en) 2015-06-15 2016-12-23 (주)성진포머 Manufacturing method of eccentric shaft for compressor by automatic cold forging process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108723722A (en) * 2018-06-29 2018-11-02 浙江百达精工股份有限公司 A kind of rotary compressor bent axle blank manufacturing method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59209441A (en) * 1983-05-12 1984-11-28 Toshiba Corp Production of shaft for compressor
JPS63224826A (en) * 1987-03-13 1988-09-19 Sumitomo Metal Ind Ltd Manufacture of rim for wheel for automobile
JPH01148474A (en) * 1987-12-03 1989-06-09 Toshiba Corp Manufacture of crank shaft
JPH0315609A (en) * 1989-06-12 1991-01-24 Mazda Motor Corp Manufacture of assembly cam shaft
JPH04350307A (en) * 1991-01-22 1992-12-04 Hino Motors Ltd Manufacture of cam shaft and device thereof
JPH05221203A (en) * 1991-09-11 1993-08-31 Hino Motors Ltd Axle shaft and its manufacture
KR20040062281A (en) * 2003-01-02 2004-07-07 김영기 Making method of crank shaft and motor shaft

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59209441A (en) * 1983-05-12 1984-11-28 Toshiba Corp Production of shaft for compressor
JPS63224826A (en) * 1987-03-13 1988-09-19 Sumitomo Metal Ind Ltd Manufacture of rim for wheel for automobile
JPH01148474A (en) * 1987-12-03 1989-06-09 Toshiba Corp Manufacture of crank shaft
JPH0315609A (en) * 1989-06-12 1991-01-24 Mazda Motor Corp Manufacture of assembly cam shaft
JPH04350307A (en) * 1991-01-22 1992-12-04 Hino Motors Ltd Manufacture of cam shaft and device thereof
JPH05221203A (en) * 1991-09-11 1993-08-31 Hino Motors Ltd Axle shaft and its manufacture
KR20040062281A (en) * 2003-01-02 2004-07-07 김영기 Making method of crank shaft and motor shaft

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101128579B1 (en) * 2005-01-26 2012-03-27 엘지전자 주식회사 A manufacturing process of crank shaft for a rotary compressor
KR20160147327A (en) 2015-06-15 2016-12-23 (주)성진포머 Manufacturing method of eccentric shaft for compressor by automatic cold forging process

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CN1450280A (en) 2003-10-22
CN1228555C (en) 2005-11-23

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