KR20110005334A - Automobile axle shaft and manufacture method - Google Patents

Automobile axle shaft and manufacture method Download PDF

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Publication number
KR20110005334A
KR20110005334A KR1020090062794A KR20090062794A KR20110005334A KR 20110005334 A KR20110005334 A KR 20110005334A KR 1020090062794 A KR1020090062794 A KR 1020090062794A KR 20090062794 A KR20090062794 A KR 20090062794A KR 20110005334 A KR20110005334 A KR 20110005334A
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South Korea
Prior art keywords
main body
spline
axle shaft
spline member
tubular
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KR1020090062794A
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Korean (ko)
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정기옥
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정기옥
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Priority to KR1020090062794A priority Critical patent/KR20110005334A/en
Publication of KR20110005334A publication Critical patent/KR20110005334A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00Making other particular articles
    • B21D53/88Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08Tube expanders
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/02Welded joints

Abstract

PURPOSE: An axle shaft for a vehicle and a manufacturing method thereof are provided to reduce deformation occurred during a heat-treatment process by integrally coupling a main body and a spline member. CONSTITUTION: A manufacturing method of an axle shaft for a vehicle is as follows. A first pipe body, which is a main body(10) of an axle shaft, with a big diameter and a second pipe body, which is a spline member, with a small diameter are prepared. The first pipe body is expanded and is composed of a spline forming part, a first inclined part(3), a first pipe body part(4), a second inclined part(5), and a second pipe body part(6). A concavo-convex part(8) is formed in the spline forming part. Concavo-convex parts(11) are formed in both inner ends of the main body.

Description

자동차용 엑슬축 및 그 제조방법{Automobile axle shaft and manufacture method}Automobile axle shaft and manufacturing method {Automobile axle shaft and manufacture method}

본 발명은 자동차에 설치되어 엔진에서 발생한 구동력을 변속기를 통하여 바퀴에 전달하는 엑슬축(AXLE SHAFT)의 제조방법과 그러한 방법에 의해 제조되는 엑슬축에 관한 것으로서, 더욱 상세하게는 환봉이 아닌 관체(튜브)를 이용하여 엑슬축을 제조하되, 엑슬축의 양쪽에 스플라인이 형성되는 스플라인 부재와 가운데 관체로 구성된 본체를 별도의 공정을 통해서 제조한 후에 상호 연결하여 구성된 자동차용 엑슬축 및 그 제조방법에 관한 것이다.The present invention relates to a method for manufacturing an axle shaft (AXLE SHAFT) is installed in a vehicle and transmits the driving force generated in the engine to the wheel through the transmission, and more specifically, the axle shaft manufactured by such a method, the tube (not a round rod) Tube) to manufacture an axle shaft, and a spline member in which splines are formed on both sides of the axle shaft, and a body formed of a central tube through a separate process, and then connected to each other, and the axle shaft for automobiles and a method of manufacturing the same. .

주지하는 바와 같이 자동차에서 엔진의 구동으로 얻어지는 회전력이 변속기를 통하여 변속된 후 엑슬축에 의해 바퀴에 전달되어 자동차가 주행하게 되는 것으로, 엑슬축의 가운데는 엑슬축의 내구력을 위하여 굵게 형성되고 양쪽은 좀 가늘면서 선단부 외주연에는 스플라인이 형성되어 있다.As is well known, the rotational force obtained by driving the engine in the car is transmitted through the transmission and then transmitted to the wheels by the axle shaft, and the vehicle is driven. The center of the axle shaft is formed thick for durability of the axle shaft and both sides are a little thin. On the outer periphery of the tip, splines are formed.

종래 이러한 엑슬축은 환봉을 선삭가공하여 사용되었는데, 자동차의 주행과정에서 차체 흔들림과 엔진출력 음에 의한 진동노이즈가 엑슬축에 그대로 전달되어 제동/구동품질에 치명적인 결합이 발생되었고, 이에 따라서 노이즈방지용 댐퍼를 추가로 부착하여 사용해야 하는 단점과 무겁기 때문에 자동차를 경량화하는 추세에 역행하는 점이 있었다.Conventionally, such axle shafts were used by turning round rods, and vibration noise caused by vehicle shake and engine output sound were transmitted to the axle shafts as they were, resulting in a fatal coupling to braking / driving quality. The disadvantages and heavy use of the additional attachment was to counter the trend of lightening the car.

상기한 환봉을 선삭가공으로 형성된 엑슬축의 단점을 해결하기 위하여 관체를 이용하여 엑슬축을 제조하는 방법이 안출되기도 하였지만 스플라인이 형성되는 부분에 적절한 두께를 구비하는 기술이 어렵고 회전응력에 견디는 힘이 부족한 단점이 있었다.In order to solve the shortcomings of the axle shaft formed by turning the round bar, a method of manufacturing an axle shaft using a tubular body has been devised. However, a technology having an appropriate thickness on the part where the spline is formed is difficult, and a strength that is insufficient in the strength of rotational stress is lacking. There was this.

또한, 엑슬축을 형성하기 위하여 관체의 양쪽을 축관하고 선단부 외주연에 스플라인을 형성한 후 엑슬축을 열처리하는 과정에서 가운데 관체로 구성된 본체가 변형되는 단점이 있어 엑슬축의 품질이 떨어지는 등의 문제점이 있었다.In addition, in order to form the axle shaft, both sides of the tube and the spline is formed on the outer periphery of the tip portion, the main body consisting of the tube is deformed in the process of heat-treating the axle shaft, there was a problem such as deterioration of the quality of the axle shaft.

상기한 문제점을 해결하기 위한 본 발명은 엑슬축을 열처리하는 과정에서 엑슬축을 구성하는 관체부에서 변형이 많이 되는 점을 감안하여 엑슬축을 구성하는 관체로 된 본체와 스플라인 부재를 분할하여 각각 제조하고 열처리한 후에 상호 용접으로 일체화시키는 엑슬축 제조방법을 제공하며,In order to solve the above problems, in view of the fact that a large number of deformations occur in the tubular part constituting the axle shaft during the heat treatment of the axle shaft, the main body and the spline member of the tubular body constituting the axle shaft are manufactured and heat-treated respectively. It provides a method of manufacturing the axle shaft to be integrated by mutual welding later,

상기와 같은 엑슬축 제조방법에 의해서 열처리로 변형시킨 후에 완성시킨 엑슬축은 완성 후 열처리하는 과정에서 발생하는 비틀림 등 변형되는 단점을 해결하였기 때문에 열처리에 의한 변형에 단점을 해결하고, 내구성 및 직진도를 크게 향상켜줌으로써, 품질이 우수한 엑슬축을 제공할 수 있도록 하는데 소기의 목적하는 바가 있다.As the axle shaft finished after the deformation by heat treatment by the axle shaft manufacturing method as described above solves the disadvantages of deformation such as torsion occurring during the heat treatment after completion, it solves the shortcomings in deformation by heat treatment, and improves durability and straightness. By greatly improving, it is desired to provide a high quality axle shaft.

상기 목적을 달성하기 위한 본 발명의 자동차용 엑슬축 및 그 제조방법은, 엑슬축의 가운데 부분을 구성하는 관체로 된 본체와 양쪽에 스플라인 부재를 분리하여 제조한 후에 상호 연결하여 용접으로 일체화한 것으로서, 더욱 상세하게는 엑슬축의 가운데 부분을 구성하는 관체로 된 본체는, 양쪽 내주연에 요철부를 형성하고, 스플라인 부재는 선단부 외주연에 스플라인을 형성하고 스플라인 부재의 일측을 다단으로 확관하고 단부에 요철부를 형성한 후, 관체로 된 본체와, 스플라인 부재를 열처리하고 본체와, 스플라인 부재의 요철부를 서로 결합한 다음 용접으로 일체화하고 용접부를 가공하는 것이 본 발명에 특징이다.In order to achieve the above object, the axle shaft for a vehicle of the present invention and a method for manufacturing the same are formed by separating a spline member on both sides of a main body made of a tubular body constituting a center portion of the axle shaft, and then interconnecting and integrating the welding. More specifically, the tubular body constituting the center portion of the axle shaft has concave-convex portions on both inner circumferences, the spline member forms splines on the outer circumference of the distal end, and expands one side of the spline member in multiple stages, After forming, the present invention is characterized in that the tubular body and the spline member are heat treated, the main body and the uneven portions of the spline member are joined to each other, integrated by welding, and the welded portion is processed.

이상 설명한 바와 같은 본 발명에 의하면, 엑슬축을 구성하는 관체로 된 본체와 스플라인 부재의 각 부분을 별도의 공정으로 제조하고, 열처리한 후에 상호 결합하고 용접수단으로 일체화하였기 때문에 종래 엑슬축을 완성하고 열처리하는 과정에서 변형이 되는 단점을 해결하는 효과가 있으며,According to the present invention as described above, since the respective parts of the main body and the spline member of the tubular body constituting the axle shaft is manufactured in a separate process, and after the heat treatment, they are joined to each other and integrated by welding means to complete and heat the conventional axle shaft It is effective in solving the disadvantages of deformation in the process,

또한, 본체와 스플라인 부재를 열처리한 후에 연결하였기 때문에 직진도 및 내구성이 크게 향상되고, 엑슬축 전체가 관체로 제공되기 때문에 엑슬축의 경량화에 기여하는 등 품질이 우수한 엑슬축을 제공하는 효과가 있다.In addition, since the main body and the spline member are connected after the heat treatment, the straightness and durability are greatly improved, and since the entire axle shaft is provided as a tubular body, there is an effect of providing an axle shaft with excellent quality, such as contributing to weight reduction of the axle shaft.

이하, 본 발명에 의한 자동차용 엑슬축 및 그 제조방법을 첨부된 도면에 의거 본 발명을 상세히 살펴보면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings of the axle shaft for automobile according to the present invention and a method for manufacturing the same.

도 1은 본 발명에 의한 스플라인 부재를 보인 단면도1 is a cross-sectional view showing a spline member according to the present invention

도 2.3은 본 발명에 의한 압출공정을 나타낸 공정별 단면도2.3 is a cross-sectional view for each process showing an extrusion process according to the present invention

도 4는 본 발명에 의한 스플라인 및 요철부가 형성된 측면도Figure 4 is a side view of the spline and irregularities formed in accordance with the present invention

도 5는 본 발명에 의한 스플라인 부재와 본체를 조립하기 위한 예시도5 is an exemplary view for assembling the spline member and the main body according to the present invention.

도 6은 본 발명에 의한 스플라인 부재와 본체가 용접된 상태를 보인 측면도Figure 6 is a side view showing a state in which the spline member and the main body according to the invention welded

도 7은 본 발명에 의한 스플라인 부재와 본체의 용접부를 가공한 측면도이다.It is a side view which processed the welding part of the spline member and a main body which concerns on this invention.

제 1공정: 소재준비First Step: Material Preparation

본 발명은 엑슬축으로서 요구되는 조건을 갖는 재질의 관체를 마련하되, 엑슬축의 본체가 되는 직경이 큰 관체와, 스플라인 부재가 되는 직경이 작은 관체를 준비한다. The present invention provides a tubular body of a material having a condition required as the axle shaft, and prepares a tubular body having a large diameter serving as the main body of the axle shaft and a tubular body having a small diameter serving as the spline member.

상기 엑슬축의 본체가 되는 직경이 큰 관체는 엑슬축의 본체와 같은 크기에 직경을 가지는 것이 타당하고, 스플라인 부재가 되는 직경이 작은 관체는 스플라인의 외경과 같은 크기의 관체를 준비한다.It is appropriate that the large diameter tube serving as the main body of the axle shaft has the same size as the main body of the axle shaft, and the small diameter tube serving as the spline member prepares a tube having the same size as the outer diameter of the spline.

제2공정: 1차 Second Process: Primary 확관Expansion 공정 fair

스플라인 부재(1)가 되는 직경이 작은 관체를 다이스를 이용하여 스플라인 형성부(2)와 1차 경사부(3)를 형성한다.The spline formation part 2 and the primary inclination part 3 are formed using the dice | dies with the small diameter pipe used as the spline member 1 with a dice | dies.

제3공정: 2차 Third Process: Secondary 확관Expansion 공정 fair

상기 1공정에 연속하여 관체부(4) 및 2차 경사부(5),관체부(6)를 형성하되,상기 관체부(6)의 내경과 외경을 엑슬축의 본체(10)의 내경과 외경이 같게 확관한 다.The tubular part 4, the secondary inclined part 5, and the tubular part 6 are formed continuously in the first step, and the inner and outer diameters of the main body 10 of the axle shaft are defined by the inner and outer diameters of the tubular part 6. This is equally assured.

제4공정: 요철 및 스플라인 공정4th step: irregularities and spline process

스플라인 형성부(2)에 스플라인(7)을 형성하고 관체부(6)의 단부를 축관하는 동시에 요철부(8)를 형성하여 스플라인 부재(1)를 완성한다.The spline 7 is formed in the spline formation part 2, the end part of the tubular part 6 is piped, and the uneven part 8 is formed, and the spline member 1 is completed.

제5공정: 본체에 요철부 공정5th process: Uneven part process in main body

상기 제 4공정에서 마련된 스플라인 부재(1)의 요철부(8)를 본체(10)에 결합하기 위하여 관체로 된 본체(10)의 양쪽 내주연에 요철부(11)를 형성한다.In order to couple the uneven parts 8 of the spline member 1 provided in the fourth step to the main body 10, the uneven parts 11 are formed on both inner circumferences of the main body 10 made of tubular body.

제6공정 풀림 열처리 공정6th annealing heat treatment process

상기 스플라인 부재 및 관체로 된 본체가 소성변형에 의해 형성된 응력을 풀림 열처리(Annealing)를 통하여 해소시킨다.The splined member and the tubular body solve the stress formed by plastic deformation through annealing.

제7공정: 용접 및 가공 공정7th step: welding and processing

제1~4공정에 의해서 제조된 스플라인 부재 2개를 준비하고 제 5공정에서 제조된 본체를 준비하여 요철부를 상호 결합하고 연결부분을 용접하여 일체화시킨 다음, 상기 용접 공정에 의한 용접부를 가공하고, 스플라인의 단부에 링홈을 가공하고, 중앙부 직경이 축소된 부분과 축소되지 않은 부분 사이에 전조공정을 통하여 홈을 가공한다.Prepare two spline members manufactured by the first to fourth processes, prepare the main body manufactured by the fifth process, join the uneven parts to each other, weld the connecting parts to integrate them, and then process the welded part by the welding process, A ring groove is machined at the end of the spline, and the groove is machined through a rolling process between the portion where the center diameter is reduced and the portion that is not reduced.

제8공정: 마무리 공정8th Step: Finishing Process

가공이 완성된 제품의 표면에 침탄공정과 마스킹 및 도장을 실시하여 엑슬축(100)의 제조를 완료한다. Carburizing process, masking and painting is performed on the surface of the finished product to complete the manufacture of the axle shaft (100).

상기와 같은 방법으로 완성된 엑슬축(100)은 관체로 된 본체(10)와 스플라인 부재(1)를 분리하여 가공하고 열처리한 후에 상호 용접으로 연결하였기 때문에 변형을 최소화시킬 수 있다.The axle shaft 100 completed in the above manner can minimize the deformation because the main body 10 and the spline member 1, which are made of tubular bodies, are processed and heat treated, and then connected to each other by welding.

이렇게 완성된 엑슬축(100)은 관체로 된 본체의 양쪽 내부에 형성된 요철부와 스플라인 부재에 형성된 요철부를 상호 결합하여 용접으로 일체화하였기 때문에 더욱 견고한 연결상태를 유지하게 된다.The axle shaft 100 thus completed maintains a more solid connection because the uneven portions formed on both sides of the tubular body and the uneven portions formed on the spline member are integrated with each other by welding.

또한, 엑슬축의 내부가 중공이 되어 무게를 절감하는 것은 물론이고, 압출에 의한 소성가공으로 재질의 밀도가 향상되어 비틀림 응력이나 회전 토크에 견디는 힘이 강하고 높은 인장강도 등을 얻을 수 있는 것이다. In addition, the inside of the axle shaft is hollow to reduce the weight, as well as to improve the density of the material by plastic processing by extrusion to obtain a high tensile strength, such as strong torsional stress or rotational torque.

도 1은 본 발명에 의한 스플라인 부재를 보인 단면도1 is a cross-sectional view showing a spline member according to the present invention

도 2.3은 본 발명에 의한 압출공정을 나타낸 공정별 단면도2.3 is a cross-sectional view for each process showing an extrusion process according to the present invention

도 4는 본 발명에 의한 스플라인 및 요철부가 형성된 측면도Figure 4 is a side view of the spline and irregularities formed in accordance with the present invention

도 5는 본 발명에 의한 스플라인 부재와 본체를 조립하기 위한 예시도5 is an exemplary view for assembling the spline member and the main body according to the present invention.

도 6은 본 발명에 의한 스플라인 부재와 본체가 용접된 상태를 보인 측면도Figure 6 is a side view showing a state in which the spline member and the main body according to the invention welded

도 7은 본 발명에 의한 스플라인 부재와 본체의 용접부를 가공한 측면도7 is a side view of a spline member and a welded portion of the main body according to the present invention;

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

1: 스플라인 부재1: spline member

2: 스플라인 형성부2: spline formation

3: 1차 경사부3: primary slope

4:6: 관체부4: 6: tube

5: 2차 경사부5: secondary slope

7: 스플라인7: spline

8:11: 요철부8:11: Unevenness

10: 본체10: main body

Claims (2)

엑슬축의 본체가 되는 직경이 큰 관체와, 스플라인 부재가 되는 직경이 작은 관체를 준비하며,Prepare a large diameter tube to be the main body of the axle shaft and a small diameter tube to be the spline member, 스플라인 부재(1)가 되는 직경이 작은 관체를 다이스를 이용하여 스플라인 형성부(2)와 1차 경사부(3), 및 연속하여 관체부(4), 2차 경사부(5)와 관체부(6)를 확관하되, 상기 관체부(6)를 엑슬축의 본체(10)의 직경과 같게 확관하는 공정과;The spline forming part 2 and the primary inclined part 3, and the tubular part 4, the secondary inclined part 5, and the tubular part are used for the small diameter pipe used as the spline member 1 using a dice. (6) expanding, but expanding the tubular portion (6) equal to the diameter of the main body (10) of the axle shaft; 스플라인 형성부(2)에 스플라인(7)을 형성하고 관체부(6)의 단부를 축관하고 요철부(8)를 형성하는 공정으로 스플라인 부재(1)를 완성하는 단계와;Forming a spline (7) in the spline forming portion (2), conduiting the end of the tubular portion (6) and forming the uneven portion (8) to complete the spline member (1); 스플라인 부재의 관체부에 형성된 요철부(8)를 본체(10)에 결합하기 위하여 관체로 된 본체(10)의 양쪽 내주연에 요철부(11)를 형성하는 공정으로 본체를 완성하는 단계와;Completing the main body by a step of forming the uneven parts 11 at both inner circumferences of the main body 10 made of tubular body in order to couple the uneven parts 8 formed in the tubular part of the spline member to the main body 10; 상기 스플라인 부재 및 관체로 된 본체를 가공하는 과정에서 소성변형에 의한 응력을 풀림 열처리(Annealing)를 통하여 해소시키는 공정과;A step of releasing the stress due to plastic deformation through annealing during the processing of the main body made of the spline member and the tubular body; 본체(10)의 양쪽에 스플라인 부재를 상호 결합하고 용접하는 공정, 및 용접부 가공하는 공정으로 이루어진 것을 특징으로 하는 자동차용 엑슬축 제조방법. A method of manufacturing an axle shaft for an automobile, comprising a step of mutually coupling and welding a spline member to both sides of the main body (10), and a process of welding a welding portion. 제 1항에 의해서 스플라인 형성부(2)에 스플라인(7)이 형성되고 관체부(6)의 단부를 요철부(8)를 형성하여 구성된 스플라인 부재(1)와 본체(10)를 상호 결합하되, 본체의 양쪽에 형성된 요철부(11)에 스플라인 부재에 형성된 요철부(8)를 결합 하고 용접으로 일체화된 것을 특징으로 하는 자동차용 엑슬축.The spline (7) is formed in the spline forming part 2 by claim 1 and the spline member (1) and the main body (10) formed by forming an uneven portion (8) at the end of the tubular portion (6), Axle shaft for automobiles, characterized in that the concave-convex portion (11) formed on both sides of the main body coupled to the concave-convex portion (8) formed in the spline member and integrated by welding.
KR1020090062794A 2009-07-10 2009-07-10 Automobile axle shaft and manufacture method KR20110005334A (en)

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