KR20090070181A - Method for manufacturing knuckle of vehicle - Google Patents

Method for manufacturing knuckle of vehicle Download PDF

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Publication number
KR20090070181A
KR20090070181A KR1020070138092A KR20070138092A KR20090070181A KR 20090070181 A KR20090070181 A KR 20090070181A KR 1020070138092 A KR1020070138092 A KR 1020070138092A KR 20070138092 A KR20070138092 A KR 20070138092A KR 20090070181 A KR20090070181 A KR 20090070181A
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KR
South Korea
Prior art keywords
knuckle
casting
socket
forging
vehicle
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KR1020070138092A
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Korean (ko)
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김진복
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명화공업주식회사
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Priority to KR1020070138092A priority Critical patent/KR20090070181A/en
Publication of KR20090070181A publication Critical patent/KR20090070181A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00Casting in, on, or around objects which form part of the product
    • B22D19/04Casting in, on, or around objects which form part of the product for joining parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/02Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms billets, in which the cross-sectional form is unimportant Rolling combined with forging or pressing
    • B21B1/024Forging or pressing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/28Making machine elements wheels; discs
    • B21K1/40Making machine elements wheels; discs hubs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D7/00Steering linkage; Stub axles or their mountings
    • B62D7/18Steering knuckles; King pins
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C27/00Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/06Alloys based on chromium

Abstract

A manufacturing method for a knuckle for a vehicle is provided to reduce the manpower by omitting a separate socket assembly step. A manufacturing method for a knuckle for a vehicle comprises: a step of casting an aluminum socket in a socket binding part of a knuckle(100) at the same time with casting the knuckle in a casting mold; a step of forging the knuckle after casting; a step of trimming the knuckle after forging; a step of heat-treating the trimmed knuckle; a step of processing one piece of the heat-treated knuckle; and a step of assembling three or more bushes in the knuckle.

Description

자동차용 너클 제조 방법{Method for manufacturing knuckle of vehicle}Method for manufacturing knuckle of vehicle
본 발명은 자동차용 너클 제조 방법에 관한 것으로서, 더욱 상세하게는 자동차용 너클을 주조할 때, 너클과 결합되는 알루미늄 소켓을 함께 주조하여 공수절감 및 생산성을 향상시킬 수 있도록 한 자동차용 너클 제조 방법에 관한 것이다.The present invention relates to a method for manufacturing a knuckle for an automobile, and more particularly, to an automotive knuckle manufacturing method for casting an aluminum socket that is combined with a knuckle to improve air-saving and productivity when casting an automotive knuckle. It is about.
차량의 조향장치는 운전자가 직접 스티어링 휠을 조작하여 그 조작력을 조향기어와 링크에 전달하는 조작기구와, 스티어링 휠의 회전을 감속하여 조작력을 증대시키고 조작기구의 운동방향을 바꾸는 기어장치와, 기어장치의 작동을 앞바퀴에 전달하고 좌우 바퀴의 관계위치를 바르게 지지하는 링크기구로 이루어진다. The steering device of the vehicle includes an operation mechanism that directly drives the steering wheel to transmit the operating force to the steering gear and the link, a gear device that increases the operating power by reducing the rotation of the steering wheel, and changes the direction of movement of the operation mechanism. It consists of a link mechanism that transmits the operation of the device to the front wheels and correctly supports the relative position of the left and right wheels.
특히, 링크기구는 기어장치의 회전력이 입력되는 피트먼 암, 조작력을 바퀴로 전달하는 타이로드 및 바퀴와 타이로드에 체결되는 너클 등으로 구성된다.In particular, the link mechanism is composed of a pitman arm into which the rotational force of the gear device is input, a tie rod for transmitting the operating force to the wheel, and a knuckle fastened to the wheel and the tie rod.
상기 너클은 통상적으로 주철재로서, SCM440와 같은 크롬-몰리브덴 합금강 등으로 이루어진 기계구조용 합금강을 열처리 및 기계 가공하여 제조하였다.The knuckle is typically a cast iron material, and was manufactured by heat treatment and mechanical processing alloy steel for mechanical structures made of chromium-molybdenum alloy steel such as SCM440.
이를 간단히 살펴보면, 원소재를 소성 단조 가공하는 소성 단계와, 노멀라이 징을 통하여 내부의 조직을 표준화시키는 열처리 단계와, 스핀들과 홀더를 형성시키는 기계가공 단계와, 스핀들에 고주파 열철리를 실시하는 고주파 열처리 단계와, 스핀들을 정밀하게 가공하는 정삭가공단계를 통하여 차량용 너클을 제조하였다.Briefly, the firing step of firing and forging the raw materials, the heat treatment step of normalizing the internal structure through normalizing, the machining step of forming the spindle and the holder, and the high frequency hot-rolling of the spindle The vehicle knuckle was manufactured through a heat treatment step and a finishing step of precisely machining the spindle.
또한, 일반적으로 주철재료는 단조강재보다는 제조공정상의 특성으로 인하여 제조단가가 상대적으로 저렴한 것으로 알려져 있어서, 일부 차량의 너클에는 구상흑연주철소재를 고주파 열처리하여 제작하고 있기도 하다.In addition, cast iron materials are generally known to be relatively inexpensive due to the characteristics of manufacturing processes rather than forged steels, and some knuckles of vehicles are manufactured by induction hardening of spherical graphite iron materials.
보다 상세하게는, 기존의 주철재 너클의 제조 방법은 첨부한 도 5에 도시된 바와 같이 너클을 주조금형에서 주조하는 단계와; 주조후, 너클을 단조하는 단계와; 단조후, 너클을 트리밍하는 단계와; 트리밍된 너클을 열처리하는 단계와; 열처리된 너클 단품을 가공하는 단계와; 너클에 3개 이상의 부쉬를 조립하는 단계와; 현가장치의 아암과 연결되도록 볼조인트가 끼워지는 2개 이상의 소켓을 너클에 조립하는 단계; 로 진행된다.More specifically, the existing method for manufacturing a cast iron knuckle includes the steps of casting the knuckle in a casting mold as shown in Figure 5 attached; After casting, forging the knuckle; After forging, trimming the knuckle; Heat treating the trimmed knuckle; Processing the heat treated knuckle unit; Assembling three or more bushes in the knuckle; Assembling at least two sockets into which the ball joint is fitted to be connected to the arms of the suspension device in the knuckle; Proceeds.
물론, 부쉬 및 소켓의 갯수는 현가장치의 종류 및 형태에 따라 다르다.Of course, the number of bushes and sockets depends on the type and type of suspension.
그러나, 상기와 같은 기존의 너클 제조 방법은 너클의 제조 완료후, 소켓을 조립하는 단계가 진행됨에 따라, 그 최종적인 조립시간 및 조립비용이 과다하게 소요되고, 공수 증가로 생산성이 저하되는 문제점이 있다.However, in the conventional knuckle manufacturing method as described above, as the assembling of the socket proceeds after the completion of the manufacture of the knuckle, the final assembly time and assembly cost are excessively consumed, and the productivity decreases due to the increase in labor. have.
본 발명은 상기와 같은 문제점을 감안하여 안출한 것으로서, 너클의 제조 단 계중 너클 주조 단계에서 너클과 결합되는 알루미늄 소켓을 함께 주조하여, 별도의 소켓 조립 단계가 배제되어 공수절감 및 생산성을 향상시킬 수 있도록 한 자동차용 너클 제조 방법을 제공하는데 그 목적이 있다.The present invention has been made in view of the above problems, by casting together an aluminum socket coupled to the knuckle in the knuckle casting step of the knuckle manufacturing step, it is possible to eliminate the separate socket assembly step to improve the air-saving and productivity It is an object of the present invention to provide a method for manufacturing an automotive knuckle.
상기한 목적을 달성하기 위한 본 발명은 너클을 주조금형에서 주조할 때, 너클의 소켓 결합부에 알루미늄 소켓이 일시에 함께 주조되는 단계와; 주조후, 너클을 단조하는 단계와; 단조후, 너클을 트리밍하는 단계와; 트리밍된 너클을 열처리하는 단계와; 열처리된 너클 단품을 가공하는 단계와; 너클에 3개 이상의 부쉬를 조립하는 단계; 로 이루어지는 것을 특징으로 하는 자동차용 너클 제조 방법을 제공한다.The present invention for achieving the above object comprises the steps of casting the aluminum socket together at the time of the socket coupling portion of the knuckle when casting the knuckle in a casting mold; After casting, forging the knuckle; After forging, trimming the knuckle; Heat treating the trimmed knuckle; Processing the heat treated knuckle unit; Assembling three or more bushes in the knuckle; It provides a vehicle knuckle manufacturing method characterized in that consisting of.
상기한 과제 해결 수단을 통하여, 본 발명은 다음과 같은 효과를 제공할 수 있다.Through the above problem solving means, the present invention can provide the following effects.
너클의 제조 단계중 너클 주조 단계에서 너클과 결합되는 알루미늄 소켓을 함께 주조하여, 별도의 소켓 조립 단계가 배제되어 공수절감 및 생산성을 향상시킬 수 있다.By casting together the aluminum socket to be combined with the knuckle in the knuckle casting step of the knuckle manufacturing step, a separate socket assembly step can be eliminated to improve the air-saving and productivity.
이하, 본 발명의 바람직한 실시예를 첨부도면을 참조로 상세하게 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
첨부한 도 1은 너클의 제조 공정중, 주조, 단조, 트리밍된 모습의 너클을 나타내는 개략이고, 도 2는 너클 단품 가공품을 나타내는 사시도이며, 도 3은 현가장치에 너클이 조립된 것을 설명하는 개략도이다.1 is a schematic view showing a knuckle of a cast, forged, and trimmed shape during a knuckle manufacturing process, FIG. 2 is a perspective view showing a knuckle single product, and FIG. 3 is a schematic view illustrating a knuckle assembled to a suspension device. to be.
차량에 있어서의 현가장치는 차체와 휠 사이에 존재하며, 이 두 강체를 하나 혹은 다수의 링크를 이용하여 연결하여 주는 장치로서, 상하방향으로는 스프링과 쇽업소버 등에 의해 지지되고, 기타방향으로는 높은 강성과 유연성을 적절히 조화시킴으로써, 차체와 휠 사이의 상대운동을 기계적으로 적절히 조화시키는 기능을 수행하게 된다.Suspension in a vehicle exists between a vehicle body and a wheel, and is a device that connects the two rigid bodies using one or more links. The suspension device is supported by a spring and a shock absorber in the vertical direction. By appropriately balancing high stiffness and flexibility, it is possible to mechanically balance the relative movement between the body and the wheels.
이러한 현가장치는 차량의 주행 중에 발생되는 노면의 불규칙한 입력을 효과적으로 차단하여 탑승자의 안락한 승차감을 제공하고, 운전자의 운전행위 및 노면의 굴곡에 의해 발생된 차체의 흔들림을 적절히 제어하여 운전 편의성을 제공하여야 하며, 불규칙한 노면의 주행 시, 타이어 접지면에서의 수직하중을 적절한 수준으로 유지하여 선회, 제동 구동시 차량의 안정성을 확보하여야 하다는 기본 조건을 만족시켜야만 한다.Such suspension system effectively blocks irregular input of the road surface generated while driving the vehicle to provide a comfortable ride comfort of the occupant, and provides driving convenience by appropriately controlling the shaking of the vehicle body caused by the driver's driving behavior and the curvature of the road surface. In addition, when driving on irregular roads, the vertical load on the tire ground plane should be maintained at an appropriate level to satisfy the basic condition of securing vehicle stability during turning and braking driving.
상기와 같은 조건을 만족시키기 위하여 여러 종류의 현가장치가 개발되어 실차에 적용되고 있는데, 본 발명에 관계하는 종래 현가장치의 구성을 살펴보면, 도 1에서와 같이, 휠(106)을 회전 가능하게 지지하는 너클(100)은 그 하단이 로워 컨트롤 아암을 개재시켜 차체와 연결되고, 이 너클(100)의 상단은 너클 마운팅 유 닛(MU)을 통하여 코일 스프링과 쇽 업소버(102)가 일체로 형성되는 스트럿 어셈블리(104)의 하단부와 연결된다.In order to satisfy the above conditions, various types of suspension devices have been developed and applied to actual vehicles. Looking at the configuration of a conventional suspension device related to the present invention, as shown in FIG. 1, the wheel 106 is rotatably supported. The knuckle 100 has a lower end connected to the vehicle body via a lower control arm, and an upper end of the knuckle 100 is integrally formed with the coil spring and the shock absorber 102 through the knuckle mounting unit (MU). Is connected to the lower end of the strut assembly 104.
상기와 같은 역할을 하는 너클은 대개 주조, 단조, 트리밍, 열처리, 가공 단계를 거쳐 제조되는데, 기존에는 너클 단품 제조후 소켓을 별도로 끼워 장착하는 작업을 진행하였다.Knuckles that play such a role are usually manufactured through casting, forging, trimming, heat treatment, and processing steps. In the past, the knuckles were manufactured by separately inserting sockets.
이렇게 너클 단품 제작후, 너클의 소켓 장착부위에 볼조인트에 의하여 현가장치의 아암과 연결되는 소켓을 장착하게 되면, 그 제작 공수가 늘어나고 제작 시간 오래 소요되어, 생산성이 저하되는 문제점이 있었다.In this way, after the knuckle is manufactured separately, when the socket is connected to the arm of the suspension device by the ball joint on the socket mounting portion of the knuckle, the number of manufacturing time is increased and the production time is long, and there is a problem that productivity is reduced.
이에, 본 발명은 너클의 주조시, 소켓을 일시에 주조하여 소켓을 별도로 장착하는 공수를 없앤 점에 주안점이 있다.Accordingly, the present invention is focused on the point that when casting the knuckle, the socket is cast at a time to eliminate the labor of mounting the socket separately.
본 발명에 따른 너클 제조 방법은 첨부한 도 4의 순서도와 같이, 너클을 주조금형에서 주조할 때, 너클의 소켓 결합부에 알루미늄 소켓이 일시에 함께 주조되는 단계가 선행된다.In the knuckle manufacturing method according to the present invention, when the knuckle is cast in a casting mold, as shown in the flowchart of FIG. 4, the aluminum socket is temporarily cast together at the socket coupling portion of the knuckle.
이때, 주조시 금형내부에 슬라이드 코어에 강재 소켓을 끼워 넣고, 주조후 코어만 배출시킬 수 있도록 금형을 설계하여 주조한다.At this time, the steel socket is inserted into the slide core in the mold during casting, and the mold is designed and cast to discharge only the core after casting.
이어서, 주조후, 너클을 단조하는 단계와, 너클을 트리밍하는 단계가 진행된다.Then, after casting, forging the knuckle and trimming the knuckle proceed.
이때, 단조단계에서 강재소켓의 변형을 방지하기 위해 단조율과 단조조건을 미리 설정하고 슬라이드 코어를 설치하여 위치 변형이 없도록 공정 설계한다.At this time, in order to prevent the deformation of the steel socket in the forging step, the forging ratio and the forging conditions are set in advance, and the slide core is installed to design the process so that there is no position deformation.
이어서, 트리밍된 너클을 열처리하고, 열처리된 너클 단품을 가공하는 단계 가 진행된다.Subsequently, the trimmed knuckles are heat treated, and the heat treated knuckles are processed.
이때, 열처리공정은 용체화 처리, 담금질(quenching), 시효화 처리 등을 거치게 되며, 열처리 조건에 의한 물성변화가 크게 발생됨으로 각 공정에서 최적의 열처리 공정 조건 설정이 매우 중요하므로, 각 공정마다 온도, 시간를 최적화하는 파라메타를 미리 설정하여 제작한다.At this time, the heat treatment process is subjected to solution treatment, quenching, aging treatment, and the like, and since the property change caused by the heat treatment conditions is greatly generated, the optimal heat treatment process condition setting is very important in each process. In this case, the parameters to optimize the time are set in advance.
최종적으로, 상기 너클에 3개 이상의 부쉬를 조립함으로써, 본 발명의 너클로 완성 제조된다.Finally, by assembling three or more bushes in the knuckle, the knuckles of the present invention are completed and manufactured.
이와 같이, 너클의 제조 단계중 너클 주조 단계에서 너클과 결합되는 알루미늄 소켓을 함께 주조함으로써, 기존에 별도의 소켓 조립 단계가 배제되어 공수절감 및 생산성을 향상시킬 수 있게 된다.As such, by casting together the aluminum socket to be combined with the knuckle in the knuckle casting step of the knuckle manufacturing step, it is possible to eliminate the existing separate socket assembly step to improve the air-saving and productivity.
도 1은 너클의 제조 공정중, 주조, 단조, 트리밍된 모습의 너클을 나타내는 개략도,1 is a schematic diagram showing a knuckle in a cast, forged, trimmed state during the manufacturing process of the knuckle,
도 2는 너클 단품 가공품을 나타내는 사시도,2 is a perspective view showing a knuckle single product;
도 3은 현가장치에 너클이 조립된 것을 설명하는 개략도,3 is a schematic diagram illustrating that a knuckle is assembled to a suspension device;
도 4는 본 발명의 너클 제조 방법을 설명하는 순서도,4 is a flowchart illustrating a knuckle manufacturing method of the present invention;
도 5는 종래의 너클 제조 방법을 설명하는 순서도.5 is a flowchart illustrating a conventional knuckle manufacturing method.
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>
100 : 너클 102 : 쇽 업소버100: knuckle 102: shock absorber
104 : 스트럿 어셈블리 106 : 휠104: Strut Assembly 106: Wheel

Claims (1)

  1. 너클을 주조금형에서 주조할 때, 너클의 소켓 결합부에 알루미늄 소켓이 일시에 함께 주조되는 단계와; When casting the knuckle in a casting mold, the aluminum sockets are temporarily cast together at the socket coupling portion of the knuckle;
    주조후, 너클을 단조하는 단계와; After casting, forging the knuckle;
    단조후, 너클을 트리밍하는 단계와; After forging, trimming the knuckle;
    트리밍된 너클을 열처리하는 단계와; Heat treating the trimmed knuckle;
    열처리된 너클 단품을 가공하는 단계와; Processing the heat treated knuckle unit;
    너클에 3개 이상의 부쉬를 조립하는 단계;Assembling three or more bushes in the knuckle;
    로 이루어지는 것을 특징으로 하는 자동차용 너클 제조 방법.Car knuckle manufacturing method characterized in that consisting of.
KR1020070138092A 2007-12-27 2007-12-27 Method for manufacturing knuckle of vehicle KR20090070181A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102500741A (en) * 2011-10-08 2012-06-20 西安奥邦科技有限责任公司 One-step forging and molding method of steering knuckle of heavy-duty car
KR101471045B1 (en) * 2014-07-09 2014-12-09 주식회사 유런하이테크 Working process of front knuckle for car
CN105234628A (en) * 2014-07-08 2016-01-13 四平市方向机械有限公司 Machining method for straight pin hole of knuckle
CN107214288A (en) * 2017-07-12 2017-09-29 安徽凯密克企业管理咨询有限公司 A kind of knuckle moulding process
CN111941020A (en) * 2020-06-28 2020-11-17 湖北三环锻造有限公司 Machining process for steering knuckle rod part

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102500741A (en) * 2011-10-08 2012-06-20 西安奥邦科技有限责任公司 One-step forging and molding method of steering knuckle of heavy-duty car
CN105234628A (en) * 2014-07-08 2016-01-13 四平市方向机械有限公司 Machining method for straight pin hole of knuckle
KR101471045B1 (en) * 2014-07-09 2014-12-09 주식회사 유런하이테크 Working process of front knuckle for car
CN107214288A (en) * 2017-07-12 2017-09-29 安徽凯密克企业管理咨询有限公司 A kind of knuckle moulding process
CN111941020A (en) * 2020-06-28 2020-11-17 湖北三环锻造有限公司 Machining process for steering knuckle rod part
CN111941020B (en) * 2020-06-28 2021-07-13 湖北三环锻造有限公司 Machining process for steering knuckle rod part

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