JP2001334813A - Aluminum suspension-arm and its manufacturing method - Google Patents
Aluminum suspension-arm and its manufacturing methodInfo
- Publication number
- JP2001334813A JP2001334813A JP2000160279A JP2000160279A JP2001334813A JP 2001334813 A JP2001334813 A JP 2001334813A JP 2000160279 A JP2000160279 A JP 2000160279A JP 2000160279 A JP2000160279 A JP 2000160279A JP 2001334813 A JP2001334813 A JP 2001334813A
- Authority
- JP
- Japan
- Prior art keywords
- arm
- arm body
- manufacturing
- end member
- aluminum suspension
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/129—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding specially adapted for particular articles or workpieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/10—Constructional features of arms
- B60G2206/11—Constructional features of arms the arm being a radius or track or torque or steering rod or stabiliser end link
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/70—Materials used in suspensions
- B60G2206/71—Light weight materials
- B60G2206/7102—Aluminium alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/80—Manufacturing procedures
- B60G2206/81—Shaping
- B60G2206/8101—Shaping by casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/80—Manufacturing procedures
- B60G2206/82—Joining
- B60G2206/8201—Joining by welding
- B60G2206/82013—Friction or heat welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、自動車等の車輌
に用いられるアルミニウム製サスペンションアームおよ
びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum suspension arm used for a vehicle such as an automobile and a method for manufacturing the same.
【0002】[0002]
【従来の技術】自動車の各種構成部材は、車輌の軽量化
を図るために鉄系材料に代わってアルミニウム材料が汎
用されており、サスペンションアームにもアルミニウム
鍛造品が用いられている。しかし、サスペンションアー
ムは、アーム本体の一端または両端に種々形状の他の部
材を取付けるための取付部が延設されたものであり、形
状が複雑であるため、一体成形品を鍛造すると製造コス
トが高いという欠点があった。2. Description of the Related Art Aluminum components are widely used for various components of automobiles in place of iron-based materials in order to reduce the weight of vehicles, and aluminum forgings are also used for suspension arms. However, the suspension arm has a mounting portion for mounting other members of various shapes extending at one end or both ends of the arm body, and the shape is complicated. There was the disadvantage of being expensive.
【0003】そこで、生産効率の良い押出成形によるサ
スペンションアームの製造が提案されている。例えば、
押出によって本体と取付部とを一体に成形した後に所要
厚さにスライス切断する方法や、アーム本体と取付部と
を、別々に押出してそれぞれのスライス切断品をTIG
やMIG等で溶融溶接する方法である。Therefore, there has been proposed a method of manufacturing a suspension arm by extrusion molding with good production efficiency. For example,
A method in which the main body and the mounting portion are integrally formed by extrusion and then slice-cut to a required thickness, or the arm body and the mounting portion are separately extruded and each slice-cut product is subjected to TIG.
And a method of fusion welding with MIG or the like.
【0004】[0004]
【発明が解決しようとする課題】しかし、前者のアーム
本体と取付部との一体押出品ではアーム本体が中実にな
るために軽量化に反し、しかも押出可能な形状に限定さ
れるという問題点があった。また、後者の溶接品では、
アーム本体に中空押出材を採用して軽量化は可能である
が、溶接時の熱影響により接合部分の素材強度の低下や
熱歪みといった問題点が発生する。However, in the former one-piece extruded product of the arm body and the mounting portion, the arm body becomes solid, which is contrary to the weight reduction and is limited to the extrudable shape. there were. In the latter case,
Although it is possible to reduce the weight by using a hollow extruded material for the arm body, problems such as a decrease in the material strength of the joint portion and thermal distortion occur due to the influence of heat during welding.
【0005】この発明は、製造コストの低減を図り、軽
量かつ強度に優れたアルミニウム製サスペンションアー
ムおよびその製造方法の提供を目的とする。An object of the present invention is to provide an aluminum suspension arm which is lightweight and has excellent strength while reducing the manufacturing cost, and a method of manufacturing the same.
【0006】[0006]
【課題を解決するための手段】前記目的を達成するため
に、この発明のアルミニウム製サスペンションアーム
は、アーム本体(10)の少なくとも一端に、他部材を取
付ける取付部(20)が形成されたアルミニウム製サスペ
ンションアームであって、前記アーム本体(10)は押出
中空形材からなる一方、前記取付部(20)は、前記アー
ム本体(10)に連結するための連結部(21)が一体に形
成された冷間鍛造材からなり、前記取付部(20)が前記
連結部(21)を介して前記アーム本体(10)に組付ら
れ、かつ組付け部分が摩擦攪拌接合により、これら(1
0)(20)が接合一体化されていることを要旨とする。In order to achieve the above object, an aluminum suspension arm according to the present invention has an aluminum body in which a mounting portion (20) for attaching another member is formed at least at one end of an arm body (10). The arm body (10) is made of an extruded hollow profile while the mounting part (20) is integrally formed with a connecting part (21) for connecting to the arm body (10). The mounting part (20) is assembled to the arm body (10) through the connecting part (21), and the assembled part is formed by friction stir welding.
The gist is that (0) and (20) are joined and integrated.
【0007】また、この発明のアルミニウム製サスペン
ションアームの製造方法は、アーム本体(10)の少なく
とも一端に、他部材を取付ける取付部(20)が形成され
たアルミニウム製サスペンションアームの製造方法であ
って、前記アーム本体(10)を所要横断面形状の押出中
空形材を所要長さに切断して製作する一方、T4処理材
を冷間鍛造することにより、前記取付部(20)と該取付
部(20)を前記アーム本体(10)に連結するための連結
部(21)とが一体に成形された端部部材(2)を製作
し、前記アーム本体(10)の端部に連結部(21)を介し
て端部部材(2)を組付け、組付け部分を摩擦攪拌接合
によりこれら(10)(20)を接合一体化し、さらに時効
処理を施すことを基本要旨とする。Further, the method of manufacturing an aluminum suspension arm according to the present invention is a method of manufacturing an aluminum suspension arm in which a mounting portion (20) for attaching another member is formed on at least one end of an arm body (10). The arm body (10) is manufactured by cutting an extruded hollow profile having a required cross-sectional shape into a required length, and the T4 treated material is cold forged to form the mounting portion (20) and the mounting portion. An end member (2) formed integrally with a connecting portion (21) for connecting the (20) to the arm body (10) is manufactured, and a connecting portion ( The basic point is that the end member (2) is assembled via 21), the assembled parts are joined and integrated by friction stir welding, and further subjected to aging treatment.
【0008】また、前記製造方法において、前記端部部
材(2)の連結部(21)の先端側に、前記アーム本体
(10)の中空部(11)に対応する形状の突出部(23)が
形成され、前記突出部(2)をアーム本体(10)の中空
部(11)に嵌入させることによりこれら(10)(20)を
組付けることが好ましい。In the manufacturing method, a protruding portion (23) having a shape corresponding to the hollow portion (11) of the arm body (10) may be provided on the distal end side of the connecting portion (21) of the end member (2). It is preferable that these protrusions (2) are fitted into the hollow portion (11) of the arm body (10) to assemble these (10) and (20).
【0009】また、前記製造方法において、前記端部部
材(2)は、該端部部材(2)に近似した横断面形状を
有する押出材(5)を所要長さに切断した粗形材
(5’)を製作し、この粗形材(5’)に冷間鍛造を施
して所要形状に成形されることが好ましい。In the above-mentioned manufacturing method, the end member (2) may be formed by cutting an extruded material (5) having a cross-sectional shape similar to the end member (2) to a required length. 5 ′), and the forged material (5 ′) is preferably subjected to cold forging to be formed into a required shape.
【0010】[0010]
【発明の実施の形態】図1に示すアルミニウム製サスペ
ンションアーム(1)は、円筒状のアーム本体(10)の
両端に、それぞれU字形の取付部(20)を段付円柱状の
連結部(21)を介して接合されたものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An aluminum suspension arm (1) shown in FIG. 1 has a U-shaped mounting portion (20) at each end of a cylindrical arm body (10), and a stepped cylindrical connecting portion (20). 21) are joined together.
【0011】前記サスペンションアーム(1)は、次に
詳述する工程で製造される。The suspension arm (1) is manufactured by the steps described in detail below.
【0012】前記アーム本体(10)は、所定肉厚の丸パ
イプ材を押出し、これを所定長さに切断して製作する。The arm body (10) is manufactured by extruding a round pipe material having a predetermined thickness and cutting it into a predetermined length.
【0013】一方、前記取付部(20)と連結部(21)と
が一体形成された端部部材(2)は、押出と冷間鍛造と
により製作される。On the other hand, the end member (2) in which the mounting portion (20) and the connecting portion (21) are integrally formed is manufactured by extrusion and cold forging.
【0014】即ち、図2に示すように、前記端部部材
(2)の形状に近似した横断面を有する押出材(5)を
製作し、この押出材を所定厚さに切断して粗形材
(5’)を製作する。さらに、前記粗形材(5’)に対
し、冷間鍛造前にT4処理を施す必要がある。この熱処
理により、強度の向上を図るとともに、加工後の後熱処
理による変形を小さくできる。また、好ましいT4処理
条件として、500〜550℃に加熱した後に水冷する
ことを推奨できる。That is, as shown in FIG. 2, an extruded material (5) having a cross section similar to the shape of the end member (2) is manufactured, and the extruded material is cut into a predetermined thickness to form a rough shape. Produce the material (5 '). Further, it is necessary to perform a T4 treatment on the crude material (5 ′) before cold forging. By this heat treatment, strength can be improved, and deformation due to post-heat treatment after processing can be reduced. In addition, as a preferable T4 treatment condition, it is recommended that water cooling be performed after heating to 500 to 550 ° C.
【0015】次に、図3に示すように、前記粗形材
(5’)を端部部材(2)の外面形状に対応する成型用
凹部(40)を有するダイ(41)と内面形状に対応するパ
ンチ(42)とにより冷間鍛造して最終形状に形成する。
冷間鍛造による成形では、押出では成形不可能な複雑形
状も製作可能であり、寸法精度や機械的性質の優れた端
部部材(2)を製作できる。しかも切削等の機械加工よ
りも短時間で加工でき加工設備も簡素化できる。さらに
要すれば、鍛造時に生じたバリを、マシニングショッ
ト、ベルトサンダー等の周知の手段でトリミングして端
部部材(2)を仕上げる。Next, as shown in FIG. 3, the rough shaped material (5 ') is formed into an inner shape with a die (41) having a molding concave portion (40) corresponding to the outer shape of the end member (2). Cold forging with the corresponding punch (42) to form the final shape.
In forming by cold forging, a complicated shape that cannot be formed by extrusion can be manufactured, and an end member (2) having excellent dimensional accuracy and mechanical properties can be manufactured. In addition, machining can be performed in a shorter time than machining such as cutting, and the processing equipment can be simplified. If necessary, burrs generated during forging are trimmed by a known means such as a machining shot or a belt sander to finish the end member (2).
【0016】この鍛造では、連結部(21)を円柱状に形
成するとともに、径大の基端部(22)とその先端側に径
小の突出部(23)を形成して段付状に成形する。前記連
結部(21)において、基端部(22)の横断面径寸法は前
記アーム本体(10)の外径と同寸法に形成され、突出部
(23)の横断面径寸法はアーム本体(10)の中空部(1
1)と同寸法に形成されている。In this forging, the connecting portion (21) is formed in a columnar shape, and a large-diameter base end (22) and a small-diameter protruding portion (23) are formed on the distal end thereof to form a step. Molding. In the connecting portion (21), the cross-sectional diameter of the base end (22) is formed to be the same as the outer diameter of the arm body (10), and the cross-sectional diameter of the protruding portion (23) is set to the arm body ( 10) hollow part (1
It has the same dimensions as 1).
【0017】なお、前記端部部材(2)の製作に際して
は、近似形状の押出粗形材(5’)を経ず冷間鍛造のみ
で製造することもできるが、粗形材(5’)を利用する
方が生産効率が良い。また、前記粗形材(5’)は、冷
間鍛造によって寸法精度の良い端部部材(2)に成形す
るために、可及的に端部部材(2)に近似しているニア
ネットシェイプが好ましい。When the end member (2) is manufactured, the end member (2) can be manufactured only by cold forging without passing through a roughly extruded coarse material (5 '). Using is more efficient. Further, in order to form the rough shaped material (5 ') into an end member (2) having high dimensional accuracy by cold forging, a near net shape as close as possible to the end member (2) is used. Is preferred.
【0018】次に、図4および図5に示すように、前記
アーム本体(10)の両端に端部部材(2)の連結部(2
1)の突出部(23)を嵌め入れ(一端のみ図示)、アー
ム本体(10)の端面が連結部(21)の基端部(22)の端
面に接するまで差し込んでこれらを一体に組付ける。図
4および図5において、(X)はアーム本体(10)と連
結部(20)との突合せ部を示す。Next, as shown in FIGS. 4 and 5, connecting portions (2) of the end member (2) are provided at both ends of the arm body (10).
Insert the protruding part (23) of 1) (only one end is shown), insert it until the end face of the arm body (10) contacts the end face of the base end part (22) of the connecting part (21), and assemble them together . 4 and 5, (X) shows a butted portion between the arm body (10) and the connecting portion (20).
【0019】前記アーム本体(10)と端部部材(2)と
の連結は、本実施形態のように、連結部(21)の先端側
の突出部(23)をアーム本体(10)の中空部(11)に嵌
入させる構成を採用すれば、単純な突合わせよりも安定
した組付状態を得て次工程の接合作業性が良く、また接
合部分がアーム本体(10)よりも厚肉となってサスペン
ションアームとしての強度も向上する。また、連結部
(21)を段付状に形成することにより、アーム本体への
嵌入深さを規制して長さ方向の位置決めを容易に行え
る。The connection between the arm body (10) and the end member (2) is made by connecting the projecting portion (23) on the distal end side of the connecting portion (21) to the hollow of the arm body (10) as in the present embodiment. By adopting a configuration that fits into the part (11), a more stable assembling state can be obtained than simple butting, and the workability in the next process is better. Also, the joint part is thicker than the arm body (10). As a result, the strength as a suspension arm is also improved. Further, by forming the connecting portion (21) in a stepped shape, the fitting depth to the arm body is regulated, and positioning in the length direction can be easily performed.
【0020】また、上述の嵌入構造において、アーム本
体(10)の中空部(11)と連結部(21)の突出部(23)
との間のクリアランスを可及的に小さく設定して突出部
(23)を中空部(11)に圧入するようにすれば、より安
定した組付状態が得られる。また、突出部(23)および
中空部(11)の断面形状を角形や楕円形等の非円形に形
成することも好ましく、アーム本体の周方向の組付位置
の位置決めが容易になる。In the above-mentioned fitting structure, the hollow portion (11) of the arm body (10) and the projecting portion (23) of the connecting portion (21) are provided.
If the clearance between them is set as small as possible to press-fit the protruding portion (23) into the hollow portion (11), a more stable assembly state can be obtained. Also, it is preferable that the cross-sectional shape of the protruding portion (23) and the hollow portion (11) is formed in a non-circular shape such as a square or an ellipse, which facilitates positioning of the assembling position of the arm body in the circumferential direction.
【0021】次に、図4および図5に示すように、組付
けたアーム本体(10)と端部部材(2)とを摩擦攪拌接
合により接合する。摩擦攪拌接合は、例えば、径大の円
柱状回転子(31)と、該回転子(31)の平坦面からなる
肩部(32)の軸線(Q)上に、回転子(31)と一体回転
自在に突設された径小のピン状プローブ(33)とを有す
る接合工具(30)を用いて次のようにして行う。Next, as shown in FIGS. 4 and 5, the assembled arm body (10) and the end member (2) are joined by friction stir welding. In the friction stir welding, for example, the rotor (31) is integrated with the large-diameter cylindrical rotor (31) and the axis (Q) of a shoulder (32) formed of a flat surface of the rotor (31). This is performed as follows using a joining tool (30) having a small-diameter pin-shaped probe (33) rotatably protruded.
【0022】まず、前記回転子(31)を回転させなが
ら、プローブ(33)を突合せ部(X)の外周面に接触さ
せる。そして、回転するプローブ(33)との接触により
生じる摩擦熱で突合せ部(X)の近傍を軟化させるとと
もに攪拌し、さらにプローブ(33)を押し付けて突合せ
部(X)に深く挿入する。より強固な接合を行うため
に、プローブ(33)の先端がアーム部本体(10)の周壁
を超えて連結部(21)の突出部(23)に達するまで挿入
することが好ましい(図5)。また、回転子(31)の肩
部(32)をアーム部本体(10)および連結部(21)に埋
入するまで挿入することにより、摩擦熱をより多く発生
させることができ、突合せ部(X)を迅速に軟化させる
ことができる。First, the probe (33) is brought into contact with the outer peripheral surface of the butting portion (X) while rotating the rotor (31). Then, the vicinity of the butting portion (X) is softened and stirred by frictional heat generated by contact with the rotating probe (33), and the probe (33) is further pressed to be inserted deeply into the butting portion (X). In order to perform stronger bonding, it is preferable to insert the probe (33) until the tip of the probe (33) reaches the protrusion (23) of the connecting portion (21) beyond the peripheral wall of the arm portion main body (10) (FIG. 5). . Further, by inserting the shoulder portion (32) of the rotor (31) until it is embedded in the arm portion main body (10) and the connecting portion (21), more frictional heat can be generated, and the butt portion ( X) can be softened quickly.
【0023】前記プローブ(33)を所定深さまで挿入し
た後、接合工具(30)と組付物とをアーム本体(10)の
軸線(P)周りに相対的に回転させて、接合工具(30)
を突合せ部(X)の周方向に移動させる。この移動によ
り、軟化攪拌部分が接合工具(30)の通過溝を埋めるよ
うに塑性流動したのち、急速に摩擦熱を失って冷却固化
する。この現象が接合工具(30)の移動によって順次繰
り返され、アーム本体(10)と端部部材(2)とが接合
され、換言すればアーム本体(10)と取付部(20)とが
連結部(21)を介して一体に接合される。After inserting the probe (33) to a predetermined depth, the welding tool (30) and the assembly are relatively rotated about the axis (P) of the arm body (10), and the welding tool (30) is rotated. )
Is moved in the circumferential direction of the butting portion (X). By this movement, the softening and stirring portion plastically flows so as to fill the passage groove of the welding tool (30), and then rapidly loses frictional heat and solidifies by cooling. This phenomenon is sequentially repeated by the movement of the joining tool (30), whereby the arm body (10) and the end member (2) are joined, in other words, the arm body (10) and the attachment section (20) are connected to each other. They are joined together via (21).
【0024】上述した摩擦攪拌接合は固相接合であって
溶融溶接やろう付よりも低温で接合できる。そのため、
素材組織の変化が少なく、その変化は接合部近傍の狭い
範囲に留まるため、素材強度を低下や熱歪みといった熱
影響が少なく継ぎ手強度も溶融溶接と比較して優れてい
る。The above-described friction stir welding is a solid-phase welding, and can be performed at a lower temperature than fusion welding or brazing. for that reason,
Since there is little change in the material structure, and the change remains in a narrow range near the joint, there is little thermal effect such as a decrease in material strength or thermal distortion, and the joint strength is superior to that of fusion welding.
【0025】摩擦攪拌接合による接合後は、アームとし
てのさらに優れた強度を得るために時効処理を行う。時
効処理条件は、150〜200℃×5〜20時間が好ま
しい。After joining by friction stir welding, aging treatment is performed to obtain more excellent strength as an arm. The aging condition is preferably 150 to 200 ° C. × 5 to 20 hours.
【0026】前記サスペンションアーム(1)の材料と
なるアルミニウムは特に限定されないが、アーム材とし
ての強度や耐食性を有し、かつ成形性が良好である点
で、JIS 6000系のAl−Si−Mg系合金、特
に6061合金を推奨できる。The aluminum used as the material of the suspension arm (1) is not particularly limited, but is JIS 6000-based Al-Si-Mg in that it has strength and corrosion resistance as an arm material and good formability. Based alloys, especially 6061 alloys, can be recommended.
【0027】また、前記実施形態においては、取付部と
してU字形のものを例示しているが、この発明は取付部
の形状を限定するものではなく、円筒型防振ブッシュ等
の他部材の形状や取付手段によって適宜変更できる。ま
た、アーム本体も前記実施形態の断面円形のパイプ材に
限定されず、断面角形、不定形等のものも含まれる。Further, in the above-described embodiment, the U-shaped mounting portion is exemplified. However, the present invention does not limit the shape of the mounting portion, and the shape of another member such as a cylindrical vibration isolating bush may be used. And attachment means can be changed as appropriate. Further, the arm body is not limited to the pipe material having a circular cross section of the above-described embodiment, but may also include one having a rectangular cross section, an irregular shape, or the like.
【0028】[0028]
【発明の効果】以上の次第で、この発明は、アーム本体
の少なくとも一端に、他部材を取付ける取付部が形成さ
れたアルミニウム製サスペンションアームおよびその製
造方法であって、アーム本体を生産効率が良く軽量の押
出中空材として製作する一方、取付部を押出では不可能
な所望形状に成形できる冷間鍛造材として製作とし、取
付部を該取付部と一体に形成された連結部を介してアー
ム本体に組付け、組付け部分を接合して一体化されてい
るから、軽量かつ所望形状のサスペンションアームを効
率良く生産できる。また、アーム本体と取付部とは摩擦
攪拌接合によって一体化されているから、接合時の熱影
響が少なく素材強度や継ぎ手強度が優れている。さら
に、取付部および連結部を構成する端部部材はT4処理
材を冷間鍛造して製作するから、押出スライス材と比べ
て強度のばらつきが少なく、切削等の後加工もほとんど
不要となる。また接合後に時効処理することによってさ
らに優れた強度が得られる。As described above, according to the present invention, there is provided an aluminum suspension arm in which an attachment portion for attaching another member is formed on at least one end of the arm body, and a method for manufacturing the same. While being manufactured as a lightweight extruded hollow material, the mounting part is manufactured as a cold forged material that can be formed into a desired shape that cannot be formed by extrusion, and the mounting part is connected to the arm body via a connecting part formed integrally with the mounting part. The suspension arm having a desired shape can be efficiently produced because the suspension arm is assembled by joining the assembled parts. Further, since the arm main body and the mounting portion are integrated by friction stir welding, the influence of heat upon joining is small, and the material strength and the joint strength are excellent. Further, since the end members constituting the mounting portion and the connecting portion are manufactured by cold forging a T4 treated material, the variation in strength is smaller than that of the extruded slice material, and post-processing such as cutting is almost unnecessary. Further, by performing an aging treatment after joining, further excellent strength can be obtained.
【0029】また、前記端部部材の連結部の先端側に、
前記アーム本体の中空部に対応する形状の突出部を形成
し、前記突出部をアーム本体の中空部に嵌入させること
によりこれらを組付けることにより、組付時の位置決め
を容易に行え、かつ接合部分が厚肉となるから、継ぎ手
強度が向上する。[0029] Also, on the tip side of the connecting portion of the end member,
A protrusion having a shape corresponding to the hollow portion of the arm body is formed, and the protrusion is fitted into the hollow portion of the arm body to assemble them, thereby facilitating positioning at the time of assembling and joining. Since the portion becomes thick, the joint strength is improved.
【0030】また、前記端部部材は、該端部部材に近似
した横断面形状を有する押出材を所要長さに切断した粗
形材を製作し、この粗形材に冷間鍛造を施して所要形状
に成形することにより、冷間鍛造の加工時間を短縮でき
るとともに、寸法精度も向上させることができる。Further, the end member is manufactured by cutting an extruded material having a cross-sectional shape similar to that of the end member to a required length to produce a rough shape material, and subjecting the rough shape material to cold forging. By shaping into the required shape, the working time of cold forging can be shortened and the dimensional accuracy can be improved.
【図1】この発明のアルミニウム製サスペンションアー
ムおよびその製造方法の一実施形態における途中工程を
示す斜視図である。FIG. 1 is a perspective view showing an intermediate step in an embodiment of an aluminum suspension arm and a method of manufacturing the same according to the present invention.
【図2】押出材を切断して粗形材を製作する工程を示す
斜視図である。FIG. 2 is a perspective view showing a process of manufacturing a coarse material by cutting an extruded material.
【図3】粗形材に冷間鍛造を施して端部部材を製作する
工程を示す断面図である。FIG. 3 is a cross-sectional view showing a process of producing an end member by subjecting a crude material to cold forging.
【図4】アーム本体と端部部材の組付状態および摩擦攪
拌接合による接合方法を示す斜視図である。FIG. 4 is a perspective view showing an assembled state of an arm body and an end member and a joining method by friction stir welding.
【図5】アーム本体と端部部材の組付状態および摩擦攪
拌接合による接合方法を示し、一部に図4のV−V線断
面を示す正面図である。FIG. 5 is a front view showing an assembled state of the arm body and the end member and a joining method by friction stir welding, and partially showing a cross section taken along line VV of FIG. 4;
1…サスペンションアーム 2…端部部材 5…押出材 5’…粗形材 10…アーム本体 11…中空部 20…取付部 21…連結部 23…突出部 DESCRIPTION OF SYMBOLS 1 ... Suspension arm 2 ... End member 5 ... Extruded material 5 '... Coarse shape material 10 ... Arm body 11 ... Hollow part 20 ... Mounting part 21 ... Connection part 23 ... Projection
Claims (4)
他部材を取付ける取付部(20)が形成されたアルミニウ
ム製サスペンションアームであって、 前記アーム本体(10)は押出中空形材からなる一方、前
記取付部(20)は、前記アーム本体(10)に連結するた
めの連結部(21)が一体に形成された冷間鍛造材からな
り、 前記取付部(20)が前記連結部(21)を介して前記アー
ム本体(10)に組付られ、かつ組付け部分が摩擦攪拌接
合により、これら(10)(20)が接合一体化されている
ことを特徴とするアルミニウム製サスペンションアー
ム。At least one end of an arm body (10)
An aluminum suspension arm having a mounting portion (20) for mounting another member, wherein the arm body (10) is formed of an extruded hollow material, while the mounting portion (20) is formed of the arm body (10). A connecting portion (21) for connecting to the arm body (10) is integrally formed with the arm body (10) via the connecting portion (21); An aluminum suspension arm characterized in that these parts (10) and (20) are joined and integrated by friction stir welding at an assembly part.
他部材を取付ける取付部(20)が形成されたアルミニウ
ム製サスペンションアームの製造方法であって、 前記アーム本体(10)を所要横断面形状の押出中空形材
を所要長さに切断して製作する一方、T4処理材を冷間
鍛造することにより、前記取付部(20)と該取付部(2
0)を前記アーム本体(10)に連結するための連結部(2
1)とが一体に成形された端部部材(2)を製作し、 前記アーム本体(10)の端部に連結部(21)を介して端
部部材(2)を組付け、組付け部分を摩擦攪拌接合によ
りこれら(10)(20)を接合一体化し、さらに時効処理
を施すことを特徴とするアルミニウム製サスペンション
アームの製造方法。2. At least one end of the arm body (10)
A method for manufacturing an aluminum suspension arm having a mounting portion (20) for mounting another member, wherein the arm body (10) is manufactured by cutting an extruded hollow profile having a required cross-sectional shape into a required length. On the other hand, by cold forging the T4 treated material, the mounting portion (20) and the mounting portion (2
0) to the arm body (10).
1) is manufactured integrally with the end member (2), and the end member (2) is attached to the end of the arm body (10) via the connecting portion (21). And (10) and (20) are joined and integrated by friction stir welding, and further subjected to aging treatment.
端側に、前記アーム本体(10)の中空部(11)に対応す
る形状の突出部(23)が形成され、前記突出部(2)を
アーム本体(10)の中空部(11)に嵌入させることによ
りこれら(10)(20)を組付ける請求項2に記載のアル
ミニウム製サスペンションアームの製造方法。3. A protruding portion (23) having a shape corresponding to the hollow portion (11) of the arm body (10) is formed on the distal end side of the connecting portion (21) of the end member (2). The method for manufacturing an aluminum suspension arm according to claim 2, wherein the projection (2) is fitted into the hollow portion (11) of the arm body (10) to attach the projections (10) and (20).
(2)に近似した横断面形状を有する押出材(5)を所
要長さに切断した粗形材(5’)を製作し、この粗形材
(5’)に冷間鍛造を施して所要形状に成形される請求
項2または3に記載のアルミニウム製サスペンションア
ームの製造方法。4. The end member (2) is formed into a rough material (5 ′) by cutting an extruded material (5) having a cross-sectional shape similar to the end member (2) to a required length. The method for manufacturing an aluminum suspension arm according to claim 2 or 3, wherein the rough shaped material (5 ') is subjected to cold forging to be formed into a required shape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000160279A JP2001334813A (en) | 2000-05-30 | 2000-05-30 | Aluminum suspension-arm and its manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000160279A JP2001334813A (en) | 2000-05-30 | 2000-05-30 | Aluminum suspension-arm and its manufacturing method |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2001334813A true JP2001334813A (en) | 2001-12-04 |
Family
ID=18664493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000160279A Pending JP2001334813A (en) | 2000-05-30 | 2000-05-30 | Aluminum suspension-arm and its manufacturing method |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004042079A (en) * | 2002-07-10 | 2004-02-12 | Nissan Motor Co Ltd | Suspension part and method for manufacturing it |
JP2005329463A (en) * | 2004-04-19 | 2005-12-02 | Showa Denko Kk | Friction stirring and joining apparatus and friction stirring and joining method |
JP2006264555A (en) * | 2005-03-24 | 2006-10-05 | Suzuki Motor Corp | Suspension rod and its manufacturing method |
JP2013204778A (en) * | 2012-03-29 | 2013-10-07 | Hitachi Automotive Systems Ltd | Method for manufacturing disc brake |
CN110027374A (en) * | 2019-03-15 | 2019-07-19 | 宁波可挺汽车零部件有限公司 | A kind of rear bottom control arm of automobile assembly |
-
2000
- 2000-05-30 JP JP2000160279A patent/JP2001334813A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004042079A (en) * | 2002-07-10 | 2004-02-12 | Nissan Motor Co Ltd | Suspension part and method for manufacturing it |
JP2005329463A (en) * | 2004-04-19 | 2005-12-02 | Showa Denko Kk | Friction stirring and joining apparatus and friction stirring and joining method |
JP4705802B2 (en) * | 2004-04-19 | 2011-06-22 | 昭和電工株式会社 | Friction stir welding apparatus and friction stir welding method |
JP2006264555A (en) * | 2005-03-24 | 2006-10-05 | Suzuki Motor Corp | Suspension rod and its manufacturing method |
JP4589775B2 (en) * | 2005-03-24 | 2010-12-01 | スズキ株式会社 | Suspension rod and manufacturing method thereof |
JP2013204778A (en) * | 2012-03-29 | 2013-10-07 | Hitachi Automotive Systems Ltd | Method for manufacturing disc brake |
CN110027374A (en) * | 2019-03-15 | 2019-07-19 | 宁波可挺汽车零部件有限公司 | A kind of rear bottom control arm of automobile assembly |
CN110027374B (en) * | 2019-03-15 | 2022-06-21 | 宁波可挺汽车零部件有限公司 | Lower control arm assembly behind car |
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