KR101496573B1 - Automotive lower arm manufacture method - Google Patents

Automotive lower arm manufacture method Download PDF

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Publication number
KR101496573B1
KR101496573B1 KR20130121757A KR20130121757A KR101496573B1 KR 101496573 B1 KR101496573 B1 KR 101496573B1 KR 20130121757 A KR20130121757 A KR 20130121757A KR 20130121757 A KR20130121757 A KR 20130121757A KR 101496573 B1 KR101496573 B1 KR 101496573B1
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South Korea
Prior art keywords
lower arm
arc
supporting piece
piece
center hole
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KR20130121757A
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Korean (ko)
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허인태
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주식회사 새해성
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards

Abstract

The present invention relates to a method for manufacturing a lower arm for a vehicle. The purpose of the present invention is to provide a method for manufacturing a lower arm for a vehicle which allows a blanking line of a lower arm material to become an outer line of the lower arm after formation of the lower arm and forms a lower arm without a crack of a connection part between a standing piece and a supporting piece on which an arc-shaped contact surface is formed. The method for manufacturing a lower arm for a vehicle forms a lower arm without moving in a mold so that a blanking line of a lower arm material becomes an outer line of a lower arm on which the arc-shaped contact surface formed on the supporting piece of lower arm and the supporting piece are formed, thereby reducing loss of metal sheet and reducing a manufacturing process. The method for manufacturing a lower arm for a vehicle allows the lower arm to be formed in the mold so as to prevent the connection part between the supporting piece and the standing piece having an arc-shaped contact surface adhering to a first bush reinforcing pipe from being cracked, thereby increasing productivity of the lower arm and improving quality of the lower arm. To achieve the purpose, the material of the lower arm has the same shape as that of the development of lower arm, a center hole is formed on the center of a base panel, and a guide hole is formed on one side of the base panel. The material of the lower arm is prepared through blanking to form the supporting piece on the first bush connection side and the arc-shaped contact surface on the standing piece. First, second, and third molds are prepared to form the lower arm through the mold. The first mold includes a center hole coupling protrusion and a guide pin to be coupled to the center hole and the guide hole on the material of the lower arm.

Description

자동차용 로워암 제조방법{Automotive lower arm manufacture method}TECHNICAL FIELD [0001] The present invention relates to an automotive lower arm manufacturing method,

본 발명은 자동차용 로워암 제조방법에 관한 것으로서, 더욱 상세하게는 로워암 소재의 블랭킹 라인이 로워암을 성형 후, 로워암의 외곽라인이 되게 하며, 특히 호형 대접면이 형성된 기립편과 지지편의 연결부분이 균열되지 않고 성형되도록 하는 자동차용 로워암 제조방법에 관한 것이다.The present invention relates to a method of manufacturing a lower arm for an automobile, and more particularly, to a method of manufacturing a lower arm for an automobile, So that the connecting portion is formed without being cracked.

주지하는 바와 같이 자동차용 로워암은 그 차종에 따라 여러 가지 형태로 구성되며, 상기 로워암은 차체측과 바퀴측에 움직일 수 있게 설치되어 자동차가 주행시 노면의 진동 및 충격을 흡수하는 작용을 하는 것이다.As is known, the lower arm for a vehicle is formed in various forms according to the type of the vehicle, and the lower arm is movably installed on the vehicle body side and the wheel side, so that the vehicle acts to absorb vibrations and shocks on the road surface when traveling .

상기한 로워암 중에 제1부시 부재와 제2부시 부재, 볼조인트로 구성된 로워암의 제조방법을 도 1a,1b를 통해 살펴보면, 먼저 로워암 소재를 블랭킹 가공으로 준비할 때, 실물 로워암이 전개된 크기보다 더 크게 로워암 소재를 준비해야 한다.A method of manufacturing a lower arm including a first bush member, a second bush member, and a ball joint in the lower arm will be described with reference to FIGS. 1A and 1B. First, when the lower arm is prepared by blanking, The size of the arm is larger than the size of the arm.

상기와 같이 실물 로워암의 전개된 크기보다 더 크게 로워암 소재를 준비하는 이유는, 종래 로워암을 성형하는 방법에서 1차 금형을 통해 성형할 때, 로워암 소재(100)를 잡아줄 수 있는 구성이 없기 때문에 로워암 소재가 움직이는 폭을 감안해야 하고, 제1부시 보강관체에 접촉되는 호형 대접면이 형성된 기립편과 지지편의 연결부분이 밴딩될 때 연신되는 점을 감안해야 하기 때문이다.The reason why the arm material is prepared so as to be larger than the developed size of the real lower arm as described above is that when the lower arm is molded through the primary mold, It is necessary to take into account the width of the movement of the lower arm material because of the absence of the structure and to take into consideration the fact that the standing portion formed with the arc shaped contact surface contacting the first bushing reinforcing tube and the extending portion when the connecting portion of the supporting piece is bent.

상기와 같이 실물 로워암의 전개된 크기보다 더 크게 로워암 소재를 준비하여 1차~3차 금형을 통해 여러 단계 성형하는 과정에서 호형 대접면이 형성된 기립편(102)과 지지편(101)의 연결부분이 연신되는 과정에서 균열이 발생되고, 기립편에 형성된 호형 대접면(103)과 지지편(101)을 형성하기 때문에 절단면이 매끈하지 못하였다.In the course of preparing the arm material lower than the developed size of the actual lower arm as described above and performing the various stages of molding through the primary to the tertiary molds, the standing piece 102 and the supporting piece 101 Cracks were generated in the process of elongating the connecting portion and the arc-shaped receiving surface 103 and the supporting piece 101 formed on the standing piece were formed, so that the cutting surface was not smooth.

따라서, 기립편(102)에 형성된 호형 대접면과 지지편(101)에 제1부시 보강관체에 밀착시켜 용접하게 되면 상호 완전한 밀착이 이루어지지 않아 용접이 완벽하게 될 수 없는 관계로 로워암의 내구성이 떨어지는 단점이 있다.Therefore, when the arc-shaped fitting surface formed on the standing piece 102 and the supporting piece 101 are welded to the first bushing-supporting tube body, they can not be completely welded to each other, There is a downside to this.

그리고, 실물 로워암 크기보다 더 크게 로워암 소재를 블랭킹하고, 로워암을 성형한 후, 최종적으로 캠 커팅 공정에 의해서 기립편에 형성된 호형 대접면과 지지편이 형성되며, 로워암 소재 준비시 실물 로워암의 전개된 크기보다 더 크게 로워암 소재를 준비하여 성형 후 남은 부분을 트림공정으로 절단하는 관계로 인하여 금속판재의 로스(loss)가 크게 발생하게 되므로 그에 따른 원가가 상승되는 등 많은 문제점이 있다.Then, the arm material is blanked to a size larger than the actual lower arm size, and the lower arm is formed. Finally, the arc-shaped receiving surface and the supporting piece formed on the standing piece are formed by the cam cutting process, There is a problem in that the loss of the metal plate is largely generated due to the relationship that the arm material is prepared and the remaining portion after molding is cut by the trim process because the diameter is larger than the developed size of the arm, .

한국등록특허 제10-1284848호(2013년05월26일자 등록)Korean Registered Patent No. 10-1284848 (registered May 26, 2013) 한국공개특허 제10-2003-0090049호(2013년11월28일자 공개)Korean Patent Publication No. 10-2003-0090049 (published on Nov. 28, 2013) 한국공개특허 제10-2006-0021965호(2006년03월09일자 공개)Korean Patent Publication No. 10-2006-0021965 (published on Mar. 09, 2006)

본 발명은 상기한 문제점을 해결하기 위한 것으로서, 로워암 소재의 블랭킹라인, 즉 로워암의 지지편에 형성된 호형 대접면과 지지편이 완성된 로워암의 외곽 라인이 되도록 금형에서 움직이지 않게 성형되게 하여 금속판재의 로스를 줄이고, 제조공정을 단축하며,SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a blanking line of a lower arm material, that is, an arc-shaped access surface formed on a support piece of a lower arm and an outer line of a lower arm finished with a support piece, It is possible to reduce the loss of the metal plate material, shorten the manufacturing process,

로워암을 금형에서 성형할 때 제1부시 보강관체에 밀착되는 호형 대접면이 형성된 기립편과 지지편의 연결부분에 균열(터짐)현상을 방지할 수 있게 성형하여 로워암의 생산성 향상과 품질 향상에 기여할 수 있는 로워암 제조방법을 제공함에 그 목적이 있다.When forming the lower arm in the mold, it is molded to prevent the cracking phenomenon at the connecting part between the standing piece and the supporting piece, which has the arc-shaped contact surface closely attached to the first bushing reinforcing tube, thereby improving the productivity and quality of the lower arm. And a method of manufacturing a lower arm which can contribute to the lower arm.

상기 목적을 달성하기 위한 본 발명에 의한 자동차용 로워암 제조방법은, 로워암의 전개된 형상(로워암의 외곽 라인)과 같게 로워암 소재를 준비하되, 베이스 판넬 가운데 센타홀과 일측에 안내 가이드홀이 형성되고, 제 1부시 연결부쪽에 지지편과, 기립편에 호형 대접면이 형성되게 블랭킹을 통해서 로워암 소재를 준비하며,To achieve the above object, according to the present invention, there is provided a method of manufacturing a lower garment arm for a vehicle, comprising the steps of: preparing a lower arm material having the same shape as the developed shape of the lower arm (outer line of the lower arm) And a lower arm material is prepared through blanking so as to form a supporting piece on the side of the first bush connecting portion and an arc receiving surface on the rising piece,

상기 로워암 소재를 금형을 통해 성형할 수 있게 1차~3차 금형을 준비하되, 1차 금형에 센타홀 결합돌부와 안내 가이드핀을 형성하여 로워암 소재에 형성된 센타홀과 안내 가이드홀을 결합시켜서 로워암 소재가 어느 한쪽으로 밀리지 않고 정확한 위치에서 성형되게 하며,The first through third molds are prepared so that the lower arm material can be molded through a mold. A center hole joint portion and a guide pin are formed in the primary mold to form a center hole formed in the lower arm material and a guide hole So that the lower arm material is molded at the correct position without being pushed to one side,

특히, 1차~3차 금형에 통해 호형 대접면이 형성된 기립편과 지지편을 베이스 판넬로부터 1차~3차 단계;로 동시에 성형하는 제조방법이 본 발명에 특징이다.Particularly, the present invention is characterized in that the method of simultaneously molding the standing piece and the supporting piece, in which the arc-shaped fitting surfaces are formed through the primary to the tertiary molds, from the base panel in the first to third steps.

이상과 같은 본 발명에 의하면, 금형을 통해 로워암 소재가 움직이지 않게 한 후, 성형하기 때문에 로워암 소재의 블랭킹 라인이 로워암의 외곽라인이 될 수 있고, 그러한 결과로 금속판재의 로스(loss)가 생기지 않고 생산성이 향상되므로 제조원가를 절감하는 효과가 있으며,According to the present invention, since the lower arm is prevented from moving through the metal mold, the blanking line of the lower arm material can be an outer line of the lower arm. As a result, the loss of the metal plate ) Is not generated and the productivity is improved, so that the production cost is reduced,

특히, 제1부시 보강관체가 닿는 호형 대접면이 형성된 기립편과 지지편이 베이스 판넬에서 동일하게 다단계;로 성형되기 때문에 호형 대접면이 형성된 기립편과 지지편의 연결부분에 균열(터짐)현상을 방지할 수 있게 되므로 로워암의 내구성 향상과 불량을 최소화시켜 품질이 우수한 로워암을 제공하는 효과가 있다.Particularly, since the standing pieces and the supporting pieces formed with the arc-shaped fitting surfaces contacting with the first bushing reinforcing tube are formed in the same multi-step manner in the base panel, the cracks in the connecting parts of the standing pieces and the supporting pieces, It is possible to improve the durability of the lower arm and to minimize the defects, thereby providing the lower arm having high quality.

도 1a는 종래 로워암 소재 전개도, 1b는 종래 로워암의 최종 트림공정을 보인 예시도
도 2는 본 발명에 의한 로워암 제조방법을 실현하기 위한 로워암이 전개된 평면도
도 3a~3c는 본 발명의 제조공정에 의해서 로워암 성형 단계를 보인 사시도
도 4는 본 발명에 의한 로워암의 기립편이 단계별로 성형되는 단면도
도 5는 본 발명에 의한 로워암의 지지편이 단계별로 성형되는 단면도
도 6,7,8은 본 발명의 제조방법을 실현하기 위한 1차~3차 금형의 예시도1A is a developed view of a conventional lower arm, 1B is an example showing a final trim process of a conventional lower arm
2 is a plan view showing a lower arm for realizing a lower arm manufacturing method according to the present invention.
Figs. 3A to 3C are perspective views showing a lower arm forming step according to the manufacturing process of the present invention. Fig.
Fig. 4 is a cross-sectional view of a standing arm of a lower arm according to the present invention,
Fig. 5 is a cross-sectional view of a supporting member of a lower arm according to the present invention formed stepwise
Figs. 6, 7 and 8 are diagrams showing examples of primary to tertiary molds for realizing the manufacturing method of the present invention

본 발명에 의한 자동차용 로워암 제조방법을 도면과 관련하여 상세하게 설명하면 다음과 같다.A method of manufacturing a lower arm for an automobile according to the present invention will be described in detail with reference to the drawings.

본 발명에 의한 자동차용 로워암 제조방법은, 크게 로워암 소재 준비단계와, 로워암 성형을 위한 금형 준비단계와, 로워암 소재를 금형을 통해 성형하는 단계로 구분된다.The method for manufacturing a lower arm for an automobile according to the present invention can be roughly classified into a lower arm preparation step, a lower mold preparation step for lower arm forming, and a lower arm molding step through a mold.

먼저, 로워암의 전개된 형상(로워암의 외곽 라인)과 같게 로워암 소재(1)를 준비하되, 베이스 판넬(7)의 가운데 센타홀(2)과 일측에 안내 가이드홀(3)이 형성되고, 베이스 판넬(7)의 제1부시 연결부(8)쪽에 지지편(4)과 기립편(5)(5')에 호형 대접면(6)(6')이 형성되게 블랭킹을 통해서 로워암 소재(1)를 준비한다.First, the lower arm member 1 is prepared in the same manner as the unfolded shape of the lower arm (lower arm), and a guide hole 3 is formed at one side of the middle center hole 2 of the base panel 7 Is formed on the base plate 7 at the side of the first bush connecting portion 8 so as to form arc-shaped receiving surfaces 6 and 6 'on the supporting piece 4 and the standing pieces 5 and 5' Material (1) is prepared.

상기 로워암 소재를 금형을 통해 성형할 수 있게 1차~3차 금형(10)(20)(30)을 준비하되, 1차 금형(10)에 센타홀 돌출부(11)와 안내 가이드핀(12)을 형성하여 로워암 소재에 형성된 센타홀(2)과 안내 가이드홀(3)을 결합시켜 로워암 소재(1)가 어느 한쪽으로 밀리지 않고 정확한 위치에서 1차 금형에 의해서 성형되게 하며,The first through third molds 10, 20 and 30 are prepared so that the lower arm material can be formed through the mold. The center hole 10 and the guide hole pin 12 And the center hole 2 formed in the lower arm material is coupled with the guide hole 3 so that the lower arm material 1 is formed by the primary mold at the correct position without being pushed by either one,

이어서, 2차~3차 금형(20)(30)을 통해서 기립편(5)(5')과 지지편(4)을 다단계로 성형하되, 특히, 호형 대접면(6)(6')이 형성된 기립편(5)(5')과 지지편(4)의 연결부분이 균열이 발생되지 않게 베이스 판넬(7)의 제1부시 연결부(8)쪽에 호형 대접면(6)(6')이 형성된 기립편(5)(5')과 지지편(4)을 동시에 1차~3차 단계;로 서서히 밴딩하여 성형하는 동시에 센타홀(2)에 보강테(2')를 형성시킨다.Subsequently, the standing pieces 5 and 5 'and the supporting pieces 4 are formed in multiple stages through the secondary to tertiary molds 20 and 30, and in particular, the arc-shaped receiving surfaces 6 and 6' The arc shaped receiving surfaces 6 and 6 'are formed on the first bush connecting portion 8 side of the base panel 7 so that the connecting portions of the formed standing pieces 5 and 5' and the supporting piece 4 are not cracked And the reinforcing frame 2 'is formed in the center hole 2 at the same time as the formed standing pieces 5 and 5' and the supporting piece 4 are formed by bending gradually in the first to third steps.

먼저, 로워암 소재 준비 단계;를 좀 더 구체적으로 살펴본다.First, let's look more closely at the preparation phase of low-rock material.

첨부된 도면, 도 2에서 보는 바와 같이 금속판재를 블랭킹에 의해서 로워암이 전개된 형상으로 로워암 소재(1)를 준비하는 단계;2, preparing a lower arm material 1 in a shape in which a lower arm is expanded by blanking a metal plate material;

상기 로워암 소재 준비단계;에서 로워암 소재(1)의 로워암의 전개된 형상(로워암의 외곽 라인)과 같게 로워암 소재(1)를 준비하되, 베이스 판넬(7)의 가운데 센타홀(2)과 일측에 안내 가이드홀(3)을 형성하며, 또한 베이스 판넬(7)의 제1부시 연결부(8)쪽에 지지편(4)을 형성하고, 좌우측 기립편(5)(5')에 호형 대접면(6)(6')이 형성되게 한다.The lower arm material 1 is prepared in the same manner as the developed shape of the lower arm of the lower arm material 1 in the lower arm material preparation step, 2 and a guide guide hole 3 on one side and a supporting piece 4 on the side of the first bush connecting part 8 of the base panel 7 and a pair of left and right standing pieces 5, So that the arc-shaped fitting surfaces 6 and 6 'are formed.

로워암을 성형하기 위한 금형 준비 단계; 및 로워암 성형단계;를 좀 더 구체적으로 살펴본다.A mold preparation step for molding the lower arm; And the lower arm forming step will be described in more detail.

상기 로워암 소재(1)를 성형하기 위한 금형은 1차~3차 금형으로 구성되는데, 1차 금형(10)은 로워암 소재(1)를 1차 로워암(1a)로 성형할 수 있게 아웃 성형부(10a)와 인너 성형부(10b)가 형성된 1차 금형(10)으로 구성되되, 로워암 소재(1)가 1차 로워암(1a)의 형상으로 성형될 때 로워암 소재(1)가 어느 한쪽으로 밀리지 않고 정확한 위치에서 성형될 수 있게 로워암 소재(1)에 형성된 센타홀(2)과 일측에 안내 가이드홀(3)이 결합되도록 센타홀 돌출부(11)와 안내 가이드핀(12)을 1차 금형(10)의 인너 성형부(10b)에 형성되어 있다.The mold for molding the lower arm material 1 is composed of a primary mold to a tertiary mold. The primary mold 10 has a primary mold 10, The lower arm material 1 is formed as a first lower body and is formed into a shape of an arm 1a. So that the center hole 2 can be formed at an accurate position without being pushed by either one of the center hole 2 and the guide hole 3 and the center hole protrusion 11 and the guide guide pin 12 ) Is formed in the inner forming portion 10b of the primary die 10.

상기 1차 금형(10)에 의해서 로워암 소재(1)를 호형 대접면(6)(6')이 형성된 기립편(5)(5')과 제 1부시 연결부(8)쪽에 지지편(4)을 베이스 판넬(7)로부터 동시에 1차 로워암(1a)의 형상으로 성형한다.The primary metal mold 10 causes the lower arm material 1 to protrude from the standing pieces 5 and 5 'formed with arc-shaped receiving surfaces 6 and 6' Are simultaneously drawn from the base panel 7 to form the shape of the arm 1a.

그리고, 2차~3차 금형(20)(30)은 기립편(5)(5')과 지지편(4)의 연결부분에 균열이 발생되지 않게 호형 대접면(6)(6')이 형성된 기립편(5)(5')과 제1부시 연결부(8)쪽에 지지편(4)을 베이스 판넬(7)로부터 동시에 2차~3차 단계;로 서서히 아웃 성형부(20a)(30a)와 인너 성형부(20b)(30b)가 동일하게 둔각에서 직각으로 점점 형성되게 구성된다.The secondary to tertiary molds 20 and 30 are provided with arc-shaped receiving surfaces 6 and 6 'so as not to generate cracks at the connecting portions of the standing pieces 5 and 5' and the supporting piece 4 The outrigger portions 20a and 30a are gradually moved from the base panel 7 to the standing pillars 5 and 5 'and the first bush connecting portion 8 at the same time in the second to third stages, And the inner forming portions 20b and 30b are gradually formed at an obtuse angle and at a right angle.

1차 금형에서 성형된 로워암(1a)을 상기 2차~3차 금형에 의해서 로워암(1b)(1c)의 형상으로 서서히 성형하는 동시에 센타홀(2)에 보강테(2')를 형성시킨다.The lower arm 1a formed in the primary mold is gradually formed by the secondary to the tertiary molds into the shape of the lower arm 1b and 1c and the reinforcement frame 2 'is formed in the center hole 2 .

즉, 1차~3차 금형에 의해서 호형 대접면(6)(6')이 형성된 기립편(5)(5')은 3단계;로 밴딩을 통해 수평에서 90도 각으로 절곡되며, 동시에 지지편(4)도 수평에서 25도~40도 각으로 3단계 성형하는 것이다.That is, the standing pieces 5 and 5 'formed with the arc-shaped receiving surfaces 6 and 6' by the primary to the tertiary molds are bent at 90 degrees from the horizontal through the banding in three stages, The piece (4) is also subjected to three-step molding at a horizontal angle of 25 to 40 degrees.

그러면, 기립편(5)(5')과 지지편(4)은 상호 균형을 유지하면서 밴딩되기 때문에 기립편(5)(5;)과 지지편(4)의 연결부분이 균열이 발생되지 않고 성형될 수 있는 것이다.Since the standing pieces 5 and 5 and the supporting piece 4 are bent while maintaining mutual balance, cracks are not generated in the connecting portion between the standing piece 5 (5;) and the supporting piece 4 It can be molded.

1: 로워암 소재 2: 센타홀
3: 안내 가이드홀 4: 지지편
5,5': 기립편 6,6': 호형 대접면
7: 베이스 판넬 1: lower arm material 2: center hole
3: guide guide hole 4: support piece
5,5 ': standing piece 6,6': arched face
7: Base panel

Claims (2)

로워암의 전개된 형상과 같게 로워암 소재를 준비하되, 베이스 판넬의 가운데 센타홀과 일측에 안내 가이드홀이 형성되고, 제 1부시 연결부쪽에 지지편과 그 양쪽에 형성된 기립편에 호형 대접면을 형성시켜 로워암 소재를 준비하는 단계와;
상기 로워암 소재를 구성하는 베이스 판넬의 가운데 형성된 센타홀과 일측에 형성된 안내 가이드홀을 1차 금형에 형성된 센타홀 돌출부와 안내 가이드핀에 결합하여 로워암 소재가 어느 한쪽으로 밀리지 않게 호형 대접면이 형성된 기립편과 지지편을 베이스 판넬로부터 1차 성형하는 단계와;
2차~3차 금형을 통해서 호형 대접면이 형성된 기립편과 지지편의 연결부분에 균열이 발생되지 않도록 기립편과 지지편이 동시에 2차~3차 단계;로 성형되며,
상기 1차~3차 단계;를 통하여 호형 대접면이 형성된 기립편은 90도각으로, 지지편은 25도~40도각으로 성형하고, 동시에 센타홀에 보강테를 형성하는 것을 특징으로 하는 자동차용 로워암 제조방법.A guide hole is formed at one side of the middle center hole of the base panel and a supporting piece is formed at the side of the first bush connection portion and an arc-shaped support surface is formed at the rising piece formed on both sides thereof To form a lower arm material;
A center hole formed at the center of a base panel constituting the lower arm material and a guide hole formed at one side are coupled to a center hole protrusion formed in the primary mold and a guide guide pin so that the arc- Molding the standing piece and the supporting piece formed from the base panel;
In order to prevent cracks from occurring between the standing piece formed with the arc-shaped seating surface and the connecting part of the supporting piece through the secondary to tertiary molds, the standing piece and the supporting piece are simultaneously molded in the second to third steps,
Wherein the standing piece formed with the arc-shaped fitting surface is formed at an angle of 90 degrees and the supporting piece is formed at an angle of 25 to 40 degrees through the primary to tertiary steps, and at the same time, a reinforcing frame is formed in the center hole. Cancer production method. 삭제delete
KR20130121757A 2013-10-14 2013-10-14 Automotive lower arm manufacture method KR101496573B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190029256A (en) * 2017-09-12 2019-03-20 부산대학교 산학협력단 The thick plate forming apparatus having large surface for blade

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101073573B1 (en) 2009-03-13 2011-10-14 주식회사 새해성 Automotive low arm and the manufacture method
KR101284848B1 (en) * 2012-11-30 2013-07-09 이형광 Lower arm manufacture for press a method of construction

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101073573B1 (en) 2009-03-13 2011-10-14 주식회사 새해성 Automotive low arm and the manufacture method
KR101284848B1 (en) * 2012-11-30 2013-07-09 이형광 Lower arm manufacture for press a method of construction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190029256A (en) * 2017-09-12 2019-03-20 부산대학교 산학협력단 The thick plate forming apparatus having large surface for blade
WO2019054683A1 (en) * 2017-09-12 2019-03-21 부산대학교 산학협력단 Large and curved thick plate molding device for blade
KR101968415B1 (en) * 2017-09-12 2019-04-11 부산대학교 산학협력단 The thick plate forming apparatus having large surface for blade

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