JP2007237262A - Method for assembling panel parts, and panel parts - Google Patents

Method for assembling panel parts, and panel parts Download PDF

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JP2007237262A
JP2007237262A JP2006065067A JP2006065067A JP2007237262A JP 2007237262 A JP2007237262 A JP 2007237262A JP 2006065067 A JP2006065067 A JP 2006065067A JP 2006065067 A JP2006065067 A JP 2006065067A JP 2007237262 A JP2007237262 A JP 2007237262A
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self
piercing rivet
panel
joining
aluminum casting
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JP4779722B2 (en
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Takashi Matsuoka
孝 松岡
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for assembling panel parts in which a secondary trouble due to blasting treatment is eliminated on condition that an aluminum cast component is fastened/joined to a steel sheet component by using a self-pierce rivet in a post-process, and the blasting treatment for improving the coating property is applied. <P>SOLUTION: After a portion except the self-pierce rivet joint part 5 in a substrate of the aluminum cast parts 1, as a treatment objective range Bs1, is previously subjected to shot-blast treatment, this self-pierce rivet joint part 5 serves as a non-joint surface, and the aluminum cast parts is overlapped with the steel sheet parts 2 to be fastened/jointed with the self-pierce rivet 3 to make the panel parts 4. Then, after joining with the self-pierce rivet, the self-pierce rivet joint part 5 containing embossing part 12 generated with this rivet joint, as the treating objective range Bs2, is subjected to shot-blasting treatment. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、一方の部材とアルミ鋳物部品とをセルフピアスリベットにて締結・接合する工程を含むパネル部品の組立方法および一方の部材とアルミ鋳物部品とをセルフピアスリベットにて締結・接合してなるパネル部品に関するものである。   The present invention relates to a method of assembling a panel part including a step of fastening and joining one member and an aluminum casting part with a self-piercing rivet, and fastening and joining the one member and the aluminum casting part with a self-piercing rivet. It is related with the panel component which becomes.

自動車の組立ラインでは、例えば鋳造後のアルミ鋳物部品と鋼板部品とをセルフピアスリベットにて締結・接合して特定のパネル部品とし、このパネル部品を例えば車体構成部品であるところの車体骨格部材あるいは開閉体として車体組立を行い、さらに車体全体に所定の塗装を施した後に車両組立に供して、車体への各種艤装部品やシート等の組み付けのほか、エンジン，トランスミッション等の搭載が行われることになる。   In an automobile assembly line, for example, a cast aluminum cast part and a steel plate part are fastened and joined with self-piercing rivets to form a specific panel part. Car body assembly is performed as an opening and closing body, and after the predetermined coating is applied to the entire car body, it is used for vehicle assembly, in addition to assembling various equipment parts and seats to the car body, as well as mounting engines, transmissions, etc. Become.

そして、上記のようにセルフピアスリベットによる締結・接合をもってパネル部品の一部を構成することになるアルミ鋳物部品に着目した場合、後工程にて塗装が施されることを考慮してアルミ鋳物部品単体の状態で予め脱脂・化成処理を施すことが行われているほか、この脱脂・化成処理に先立って例えば特許文献１に記載のように、アルミ鋳物部品の塗装性向上、すなわちアルミ鋳物部品への塗膜の密着性や耐食性を向上させるためにその表面に予めショットブラスト等のブラスト処理を施すことが行われている。
特開２００４−３１５８６４号公報 And when paying attention to the aluminum casting parts that will constitute part of the panel parts by fastening and joining with self-piercing rivets as described above, the aluminum casting parts are taken into account that the coating is applied in the subsequent process In addition to performing degreasing and chemical conversion treatment in a single state in advance, prior to this degreasing and chemical conversion treatment, for example, as described in Patent Document 1, improvement of paintability of aluminum cast parts, that is, to aluminum cast parts In order to improve the adhesion and corrosion resistance of the coating film, blasting such as shot blasting is performed on the surface in advance.
JP 2004-315864 A

アルミ鋳物部品単体の状態で脱脂・化成処理を施すことを前提とした場合、車体組立完了後の塗装の前処理として脱脂・化成処理が施されることになるにもかかわらず部品段階でも前もって行うことになり、工程重複によるコストアップが余儀なくされることとなって好ましくない。また、アルミ鋳物部品単体の状態でブラスト処理を施した場合、鋳物表面が加工硬化するために後工程でのセルフピアスリベットによる締結・接合時にその接合部に亀裂が発生しやすくなる。セルフピアスリベット接合部に亀裂が発生すると、その部分には化成処理皮膜が形成されずにいわゆる塗膜の乗りが悪くなるために白錆が発生するほか、経年変化により亀裂が拡大して接合強度が低下するおそれがある。   If it is assumed that degrease and chemical conversion treatment is performed in the state of a single cast aluminum part, degreasing and chemical conversion treatment will be performed as a pretreatment for painting after completion of vehicle body assembly, but it will also be performed in advance at the component stage. That is, it is not preferable because the cost is increased due to duplication of processes. Further, when blasting is performed in the state of a single cast aluminum part, the surface of the cast is work-hardened, so that cracks are likely to occur at the joint during fastening and joining by self-piercing rivets in the subsequent process. When a crack occurs in a self-piercing rivet joint, a chemical conversion treatment film is not formed on that part, so the so-called coating film gets worse and white rust is generated. May decrease.

本発明はこのような課題に着目してなされたものであり、パネル部品の一部を構成することになるアルミ鋳物部品が後工程にてセルフピアスリベットをもって他の部品と締結・接合されること、および塗装性向上のためにブラスト処理が施されることを前提としながらも、ブラスト処理に伴う二次的不具合を効果的に解消し得るパネル部品の組立方法とパネル部品を提供するものである。   The present invention has been made paying attention to such a problem, and an aluminum casting part that constitutes a part of a panel part is fastened and joined to another part by a self-piercing rivet in a later process. And an assembly method of panel parts and a panel part that can effectively eliminate secondary problems associated with the blasting process on the premise that the blasting process is performed to improve paintability. .

請求項１に記載の発明は、一方の部材とアルミ鋳物部品とをセルフピアスリベットにて締結・接合する工程を含むパネル部品の組立方法であることを前提として、上記アルミ鋳物部品の素地のうちセルフピアスリベット接合部以外の領域に予めブラスト処理を施す前処理工程と、上記ブラスト処理が施されていないセルフピアスリベット接合部を非合わせ面として一方の部材とアルミ鋳物部品とを重ね合わせた上で、上記セルフピアスリベット接合部にセルフピアスリベットを打ち込んで両者を締結・接合するリベット接合工程と、上記アルミ鋳物部品の素地のうちセルフピアスリベットをもって締結・接合されたセルフピアスリベット接合部にブラスト処理を施す後処理工程とを含むことを特徴とする。   The invention according to claim 1 is based on the assumption that it is a method for assembling a panel part including a step of fastening and joining one member and an aluminum cast part with a self-piercing rivet. A pre-processing step in which blasting is performed in advance on a region other than the self-piercing rivet joint, and one member and an aluminum casting part are overlapped with the self-piercing rivet joint not subjected to the blasting as a non-mating surface. The rivet joining process in which self-piercing rivets are driven into the self-piercing rivet joints to fasten and join the two parts, and the self-piercing rivet joints that are fastened and joined with the self-piercing rivets out of the base material of the cast aluminum parts are blasted And a post-processing step for performing the processing.

より具体的には、請求項２に記載のように、上記リベット接合工程では、アルミ鋳物部品のセルフピアスリベット接合部側が凸形状となるように一方の部材側からアルミ鋳物部品に向けてセルフピアスリベットを打ち込むものとする。   More specifically, as described in claim 2, in the rivet joining step, the self-piercing from one member side toward the aluminum casting part is performed so that the self-piercing rivet joining part side of the aluminum casting part has a convex shape. Rivets shall be driven.

また、請求項８に記載の発明は、請求項１に記載の技術をパネル部品そのものとして捉えたものであり、一方の部材とアルミ鋳物部品とを重ね合わせた上でその重合部に一方の部材側からセルフピアスリベットを打ち込んで、アルミ鋳物部品側が凸形状となるように塑性変形させながら両者を締結・接合してなるパネル部品であって、セルフピアスリベット接合後に、凸形状となったセルフピアスリベット接合部を含むアルミ鋳物部品の表面にショットブラスト処理を施してあることを特徴とする。   The invention according to claim 8 is the one in which the technique according to claim 1 is grasped as a panel part itself, and one member and an aluminum casting part are overlapped, and then one member is placed in the overlapping portion. Self-piercing rivets are driven from the side, and the aluminum casting parts are plastically deformed so that the convex shape is formed on the aluminum casting part side. The surface of the cast aluminum part including the rivet joint is subjected to shot blasting.

したがって、請求項１，８に記載の発明では、アルミ鋳物部品の素地のうちセルフピアスリベット接合部以外の領域に前処理として予めブラスト処理を施すため、セルフピアスリベット接合部が加工硬化してしまうことがなく、後工程でのセルフピアスリベットによる締結・接合時に亀裂が発生するようなことがなくなる。   Therefore, in the inventions according to claims 1 and 8, since the blasting process is preliminarily performed as a pretreatment for the region other than the self-piercing rivet joint portion of the base of the aluminum cast part, the self-piercing rivet joint portion is work-hardened. And no cracks are generated at the time of fastening / joining by self-piercing rivets in the subsequent process.

また、上記のように前処理としてのブラスト処理が施されていないセルフピアスリベット接合部については、セルフピアスリベットによる締結・接合後に別途後処理として同様のブラスト処理が施されるため、当該セルフピアスリベット接合部についても他の部位と同様に塗装性向上効果が期待できるようになる。   In addition, the self-piercing rivet joint portion that has not been subjected to the blasting process as described above is subjected to the same blasting process as a separate post-treatment after the fastening and joining by the self-piercing rivet. The effect of improving paintability can be expected for the rivet joint as well as other parts.

請求項１，８に記載の発明によれば、セルフピアスリベット接合部であるかないかにかかわらずアルミ鋳物部品の素地にブラスト処理が施されるために塗装性が向上することはもちろんのこと、セルフピアスリベット接合部についてはセルフピアスリベット接合後にブラスト処理を施すことで、加工硬化していない状態でセルフピアスリベットにて接合することができ、そのセルフピアスリベット接合時の亀裂発生を抑制できるほか、万が一セルフピアスリベット接合時に亀裂が発生したとしてもブラスト処理により亀裂を潰して補修できるため、例えば亀裂にシール材を塗布する等の作業が不要で加工工数の削減が図れる。   According to the inventions described in claims 1 and 8, since the blasting process is performed on the base of the cast aluminum part regardless of whether it is a self-piercing rivet joint or not, the paintability is improved. For pierce rivet joints, by performing blasting after self-pierce rivet joining, it is possible to join with self-piercing rivets in a state where it is not work hardened, and it is possible to suppress the occurrence of cracks during self-piercing rivet joining, Even if a crack occurs at the time of self-piercing rivet joining, it can be repaired by crushing the crack by blasting. For example, an operation such as applying a sealing material to the crack is unnecessary, and the number of processing steps can be reduced.

また、組立後のパネル部品に対し塗装前処理としての脱脂・化成処理を含む塗装を施す場合、アルミ鋳物部品単体の状態で脱脂・化成処理を施す必要がなく、工程重複によるコストアップを招くことがない。   In addition, when painting is performed on panel parts after assembly, including degreasing and chemical conversion treatment as pre-painting treatment, it is not necessary to perform degreasing and chemical conversion treatment in the state of a single cast aluminum part, resulting in increased costs due to process duplication. There is no.

図１以下の図面は本発明のより具体的な実施の形態を示す図であり、自動車の車体の一部を構成することになるパネル部品の組立に適用した場合の例を示しており、特に図１はアルミ鋳物部品と鋼板部品とからなるパネル部品についてアルミ鋳物部品の鋳造から車両組立までの一連のおおまかな工程の流れを、図２はパネル部品の要部拡大断面図をそれぞれ示している。   FIG. 1 and the following drawings show a more specific embodiment of the present invention, and show an example when applied to the assembly of panel parts that constitute a part of a car body of an automobile. FIG. 1 shows a rough flow of a series of processes from casting of an aluminum casting part to vehicle assembly for a panel part made of an aluminum casting part and a steel plate part, and FIG. 2 shows an enlarged cross-sectional view of the main part of the panel part. .

図１，２に示すように、鋳造工程Ｓ１にて鋳造されたアルミ鋳物部品（以下、単に「鋳物部品」と言う）１はそのままの状態もしくは機械加工等の所定の仕上げ加工が施された後に車体組立工程Ｓ３に供され、この車体組立工程Ｓ３をリベット接合工程として後述するように例えば相手側となる鋼板部品２とセルフピアスリベット３をもって締結・接合されることによりパネル部品４と化し、さらにこのパネル部品４を車体構成部品の一部、例えば車両骨格部材あるいは開閉体として車体が組み立てられることになる。そして、組み立てられた車体は塗装工程Ｓ５に投入されて所定の塗装が施され、さらに後工程である車両組立工程Ｓ６において各種艤装部品のほかエンジンあるいはトランスミッション等が車体に組み付けられて自動車としての完成度が高められることになる。なお、上記の塗装工程Ｓ５には、周知のように前処理としての脱脂・化成処理のほか、下塗り、中塗り、上塗り等の複数の工程が含まれている。   As shown in FIGS. 1 and 2, the aluminum casting part (hereinafter simply referred to as “casting part”) 1 cast in the casting step S <b> 1 is left as it is or after a predetermined finishing process such as machining is performed. As will be described later as a rivet joining process, this body assembly process S3 is used as a rivet joining process, and, for example, a steel plate part 2 as a counterpart and a self-piercing rivet 3 are fastened and joined to form a panel part 4; The vehicle body is assembled using the panel component 4 as a part of the vehicle body component, for example, a vehicle frame member or an opening / closing member. Then, the assembled vehicle body is put into the painting process S5, and a predetermined coating is applied. In addition, in the vehicle assembly process S6, which is a subsequent process, in addition to various outfitting parts, an engine or a transmission is assembled to the vehicle body to complete the vehicle. The degree will be increased. Note that the coating process S5 includes a plurality of processes such as undercoating, intermediate coating, and topcoating as well as degreasing and chemical conversion as pretreatment as is well known.

車体組立工程Ｓ３において当該工程をリベット接合工程として鋳造後の鋳物部品１がセルフピアスリベット３をもって相手側となる鋼板部品２と締結・接合されてパネル部品４と化することは先に述べた通りであるが、セルフピアスリベット３による締結・接合に先立って、図１のほか図３に示すように、前処理としてブラスト処理工程Ｓ２にて鋳物部品１の素地のうちセルフピアスリベット３による締結・接合に関与する部分であるセルフピアスリベット接合部５を除いた部分に予めショットブラスト処理を施すものとする。ここに言うセルフピアスリベット接合部５とは、鋳物部品１の素地のうち相手側の鋼板部品２とセルフピアスリベット３をもって締結・接合されてパネル部品４と化した際に外部に露出することになる面であって（鋳物部品１の素地のうち相手側の鋼板部品２と接合された段階でパネル合わせ面として隠蔽されてしまうことになる面は含まない）、且つセルフピアスリベット３の打ち込みによる圧締力を直接受ける部分とその近傍をも含む領域を言う。図３ではショットブラスト処理対象領域にハッチングを付し、その部分をＢｓ１で示す。   As described above, the cast part 1 after casting is fastened and joined to the mating steel plate part 2 with the self-piercing rivet 3 in the body assembly process S3 as a rivet joining process. However, prior to fastening and joining with the self-piercing rivet 3, as shown in FIG. 3 in addition to FIG. It is assumed that a shot blast process is performed in advance on a portion excluding the self-piercing rivet joint portion 5 which is a portion involved in the joining. The self-piercing rivet joint 5 referred to here is exposed to the outside when it is fastened and joined with the mating steel plate part 2 and the self-piercing rivet 3 in the base of the cast part 1 to form a panel part 4. By the driving of the self-piercing rivet 3 (not including the surface of the base of the casting part 1 that will be concealed as the panel mating surface when it is joined to the mating steel plate part 2) A region that includes a portion that directly receives the pressing force and its vicinity. In FIG. 3, the shot blast processing target area is hatched, and the portion is indicated by Bs1.

ショットブラスト処理を施さないと、後工程である塗装工程Ｓ５の前処理段階で化成皮膜の付着量が不足し、防錆性の低下や外観不良を招きやすくなるためであるが、上記のようにセルフピアスリベット接合部５を除いた部分にショットブラスト処理を施すのは、セルフピアスリベット接合部５にまでショットブラスト処理を施すと、その加工硬化のために図４に示すように後工程でのセルフピアスリベット３による締結・接合時に亀裂Ｃが発生しやすくなるためで、この亀裂Ｃの発生を未然に防止するためである。なお、図４は後述するようにセルフピアスリベット３の打ち込みに伴いその塑性変形によって鋳物部品１側に形成されるエンボス部１２での亀裂Ｃの発生状況を示している。   If shot blasting is not performed, the amount of chemical conversion film will be insufficient at the pre-treatment stage of the coating step S5, which is a subsequent step, and it will easily lead to a decrease in rust prevention and poor appearance. The shot blasting process is performed on the portion excluding the self-piercing rivet joint 5 when the shot blasting process is performed up to the self-piercing rivet joint 5 as shown in FIG. This is because the crack C is likely to occur during the fastening and joining by the self-piercing rivet 3, and this is to prevent the crack C from occurring. FIG. 4 shows the occurrence of a crack C at the embossed portion 12 formed on the casting part 1 side by plastic deformation as the self-piercing rivet 3 is driven, as will be described later.

この前処理としてのブラスト処理は、セルフピアスリベット接合部５にマスキングを施した状態で行うものとし、例えば制振材や外板補強材等のように衝撃吸収性のあるシート等にてセルフピアスリベット接合部５を被覆した上で鋳物部品１の素地全体にショットブラスト処理を施す。より具体的には、例えば図５に示すように、粘着シート６にて裏打ちされたアルミニウム等の金属製シート７をマスキングシートとして用いてセルフピアスリベット接合部５を覆うすように貼り付けた上で、鋳物部品１の素地全体にショットブラスト処理を施す。   The pre-blasting process is performed with the self-piercing rivet joint 5 masked. For example, the self-piercing is performed with a shock-absorbing sheet such as a vibration damping material or an outer plate reinforcing material. After covering the rivet joint 5, the entire base of the cast part 1 is subjected to shot blasting. More specifically, for example, as shown in FIG. 5, a metal sheet 7 such as aluminum lined with an adhesive sheet 6 is used as a masking sheet so as to cover the self-piercing rivet joint 5. Then, the entire base of the cast part 1 is subjected to shot blasting.

ここで、鋳物部品１の形状や重量が大きないわゆる大物部品の場合には、その姿勢変更等の取り扱い補助のために鋳物部品１そのものを把持してクランプする把持治具が使用されることがある。このような場合には、図６に示すように、ベースブロック８にクランププレート９をヒンジピン１０にて回動可能に結合してなる把持治具１１をマスキング治具としても兼用化し、この把持治具１１にて鋳物部品１の素地のうち上記セルフピアスリベット接合部５を遮蔽するようにして把持・クランプした上で先のショットブラスト処理に供すると、上記の金属製シート７によるマスキングと同等のマスキング効果が得られ、コスト的にも有利となる。なお、必ずしもクランププレート９の全面がセルフピアスリベット接合部５に密着している必要はなく、要はセルフピアスリベット接合部５へのショットＳの衝突を遮ることができれば機能的に十分である。   Here, in the case of a so-called large part having a large shape and weight of the cast part 1, a gripping jig that grips and clamps the cast part 1 itself may be used to assist in handling such as changing the posture. . In such a case, as shown in FIG. 6, a gripping jig 11 formed by rotatably connecting a clamp plate 9 to a base block 8 with a hinge pin 10 is also used as a masking jig. When the tool 11 is gripped and clamped so as to shield the self-piercing rivet joint 5 of the base material of the cast part 1, it is equivalent to the masking by the metal sheet 7. A masking effect is obtained, which is advantageous in terms of cost. The entire surface of the clamp plate 9 does not necessarily need to be in close contact with the self-piercing rivet joint 5. In short, it is functionally sufficient if the collision of the shot S with the self-pierce rivet joint 5 can be blocked.

また、上記のブラスト処理工程Ｓ２でのショットブラスト処理は、後工程での脱脂・化成処理を含む塗装工程Ｓ６の前処理として、鋳物部品１の素地表面に付着している酸化皮膜や離型材の除去を目的とするものであるから、サンドブラスト処理よりも例えばショット材としてステンレス製の球を用いたショットブラスト処理の方が適している。   In addition, the shot blasting process in the blasting process S2 described above is performed as a pretreatment of the coating process S6 including a degreasing / chemical conversion process in a post process, such as an oxide film or a release material adhering to the base surface of the casting part 1. For the purpose of removal, shot blasting using, for example, stainless steel balls as the shot material is more suitable than sandblasting.

こうしてセルフピアスリベット接合部５以外の領域Ｂｓ１にショットブラスト処理が施された鋳物部品１は次工程である車体組立工程Ｓ３に供され、この車体組立工程Ｓ３をリベット接合工程として、図２のほか図７に示すように、セルフピアスリベット接合部５を非合わせ面側として相手側部品である鋼板部品２と重ね合わせた上で両者の重合部に鋼板部品２側からセルフピアスリベット３を打ち込んで両者を締結・結合し、パネル部品４として組み立てる。そのセルフピアスリベット接合部５の拡大断面は図２に示した通りであり、相手側となる鋼板部品２側からセルフピアスリベット３を打ち込むことにより、そのセルフピアスリベット３は鋳物部品１の裏面までは貫通しないものの、鋳物部品１のうちセルフピアスリベット３が打ち込まれた部分が凸形状で且つ円形のエンボス部１２となるように塑性変形することになる。また、鋳物部品１と鋼板部品２とを接合する場合には、少なくともセルフピアスリベット接合部５に相当する部分の両者の合わせ面に電食対策として予め接着剤１３を介装することが行われる。   The casting part 1 in which the shot blasting process has been performed on the region Bs1 other than the self-piercing rivet joint portion 5 is provided to the next vehicle body assembly step S3, and this vehicle body assembly step S3 is used as a rivet joint step. As shown in FIG. 7, after the self-piercing rivet joint 5 is overlapped with the mating steel plate part 2 with the non-mating surface side, the self-piercing rivet 3 is driven into the overlapping portion from the steel plate part 2 side. Both are fastened and combined, and assembled as a panel component 4. The enlarged cross section of the self-piercing rivet joint 5 is as shown in FIG. 2, and the self-piercing rivet 3 reaches the back surface of the casting part 1 by driving the self-piercing rivet 3 from the steel plate part 2 side which is the counterpart. However, the part into which the self-piercing rivet 3 is driven out of the cast part 1 is plastically deformed so as to be a convex and circular embossed part 12. In addition, when the casting part 1 and the steel plate part 2 are joined, an adhesive 13 is previously placed on the mating surfaces of at least the part corresponding to the self-piercing rivet joining part 5 as a measure against electrolytic corrosion. .

さらに、鋳物部品１と鋼板部品２とをセルフピアスリベット３をもって締結・接合することによりパネル部品４と化したならば、図１，８のほか図９に示すように、後処理工程としてのブラスト処理工程Ｓ４において鋳物部品１のうち先にショットブラスト処理が施されていないセルフピアスリベット接合部５に後処理としてショットブラスト処理を施す（ブラスト処理工程Ｓ４でのショットブラスト処理領域を符号Ｂｓ２で示す）。このセルフピアスリベット接合部５にはセルフピアスリベット３の打ち込みによって生じた図２のエンボス部１２も含まれる。   Further, when the cast part 1 and the steel sheet part 2 are fastened and joined with the self-piercing rivet 3 to form the panel part 4, as shown in FIG. 9 in addition to FIGS. In the processing step S4, a shot blasting process is performed as a post-processing on the self-piercing rivet joint 5 that has not been subjected to the shot blasting process first in the casting part 1 (the shot blasting processing area in the blasting process step S4 is indicated by a symbol Bs2). ). The self-piercing rivet joint 5 includes the embossed portion 12 of FIG. 2 generated by driving the self-piercing rivet 3.

エンボス部１２はセルフピアスリベット３の打ち込み段階ではショットブラスト処理が施されていない故に加工硬化しておらず、したがってセルフピアスリベット３の打ち込みに伴って平板状態からエンボス部１２となるべく塑性変形する際の亀裂Ｃの発生は抑制されるものの、なおも亀裂発生の可能性を残している。しかしながら、仮にエンボス部１２に微細な亀裂Ｃが発生したとしても、上記のように後からその部分にショットブラスト処理を施すことで亀裂Ｃを潰していわゆる補修を行うことができる。   When the self-piercing rivet 3 is driven, the embossed portion 12 is not hardened because shot blasting is not performed. Therefore, when the self-piercing rivet 3 is driven, the embossed portion 12 is plastically deformed from the flat state to the embossed portion 12 as much as possible. Although the generation of cracks C is suppressed, the possibility of cracks still remains. However, even if a fine crack C occurs in the embossed portion 12, it can be repaired by crushing the crack C by performing shot blast processing on the portion later as described above.

また、鋳物部品１と鋼板部品２とをセルフピアスリベット３をもって締結・接合してパネル部品４として組み立てた場合には、少なくともセルフピアスリベット接合部５に相当する部分の両者の合わせ面に電食対策として予め接着剤１３を介装することは先に述べた通りである。この場合、図１０に示すようにパネル部品４の端縁であって且つセルフピアスリベット接合部５に近い部分では、セルフピアスリベット３による圧締力を受けて接着剤１３がはみ出すことがある。そこで、ブラスト処理工程Ｓ４でのショットブラスト処理の際に接着剤１３がはみ出した端縁にも積極的にショットブラスト処理を施すことで、そのはみ出した接着剤１３を除去することができる。特にショット材として使用するステンレス球を予め冷却した上でショットブラスト処理を行うと接着剤１３の除去をより効果的に行うことができる。   Further, when the cast part 1 and the steel sheet part 2 are assembled and joined as the panel part 4 by fastening and joining with the self-piercing rivet 3, at least the portion corresponding to the self-piercing rivet joint 5 is electrolytically eroded. As described above, the adhesive 13 is interposed in advance as a countermeasure. In this case, as shown in FIG. 10, the adhesive 13 may protrude at the edge of the panel component 4 and close to the self-piercing rivet joint 5 due to the pressing force of the self-piercing rivet 3. Therefore, the protruding adhesive 13 can be removed by positively performing the shot blasting process on the edge where the adhesive 13 protrudes during the shot blasting process in the blasting process S4. In particular, when the shot blasting process is performed after the stainless steel balls used as the shot material are cooled in advance, the adhesive 13 can be removed more effectively.

こうして、図１の各工程Ｓ１〜Ｓ４を経ることにより組み立てられたパネル部品４は、例えば車体骨格部材あるいは開閉体として車体の一部を構成することになり、塗装工程Ｓ５および車両組立工程Ｓ６の各工程を経ることにより自動車としての完成度が高められることになる。   Thus, the panel component 4 assembled through the steps S1 to S4 in FIG. 1 constitutes a part of the vehicle body as, for example, a vehicle body skeleton member or an opening / closing body, and the painting step S5 and the vehicle assembly step S6 Through each step, the degree of completion as an automobile is increased.

ここで、上記塗装工程Ｓ５には脱脂・化成処理のほか、下塗り、中塗り、上塗り等の複数の工程が含まれており、先に述べたように鋳物部品１と鋼板部品２とをセルフピアスリベット３をもって締結・接合してなるパネル部品４にも脱脂・化成処理のほか、下塗り、中塗り、上塗り等のそれぞれの処理が施されることになる。この場合、鋳物部品１の素地のうち鋼板部品３との合わせ面以外の部分では、セルフピアスリベット接合部５であるかないかにかかわらずその全面に予めショットブラスト処理が施されているため、化成皮膜および塗膜の乗りが良好なものとなり、本来の塗装性を確保することが可能となる。   Here, the coating step S5 includes a plurality of steps such as undercoating, intermediate coating, and top coating in addition to degreasing and chemical conversion treatment. As described above, the casting part 1 and the steel plate part 2 are self-pierced. In addition to the degreasing and chemical conversion treatment, the panel component 4 that is fastened and joined with the rivet 3 is also subjected to various treatments such as undercoating, intermediate coating, and topcoating. In this case, the portion other than the mating surface with the steel plate part 3 in the base of the cast part 1 is subjected to the shot blasting process in advance on the entire surface regardless of whether it is the self-piercing rivet joint part 5 or not. In addition, the coating film can be satisfactorily mounted and the original paintability can be secured.

本発明のより具体的な実施の形態を示す図で、アルミ鋳物部品と鋼板部品とからなるパネル部品についてアルミ鋳物部品の鋳造から車両組立までの一連のおおまかな工程の流れを示す工程説明図。The figure which shows more concrete embodiment of this invention, and is process explanatory drawing which shows the flow of a series of rough processes from casting of aluminum casting components to vehicle assembly about the panel components which consist of aluminum casting components and steel plate components. パネル部品におけるセルフピアスリベット接合部の拡大断面図。The expanded sectional view of the self-piercing rivet junction part in panel components. 図１のブラスト処理工程Ｓ２における処理の詳細を示す図で、同図（Ａ）はアルミ鋳物部品の概略を示す斜視図、（Ｂ）は同図（Ａ）のｂ１−ｂ１線に沿う拡大断面説明図。It is a figure which shows the detail of the process in the blasting process S2 of FIG. 1, The same figure (A) is a perspective view which shows the outline of aluminum casting components, (B) is an expanded cross section along the b1-b1 line | wire of the same figure (A). Illustration. 図２のエンボス部での亀裂発生状況を示す説明図。Explanatory drawing which shows the crack generation condition in the embossed part of FIG. 図３のブラスト処理に際してのマスキング処理の一例を示す断面説明図。Cross-sectional explanatory drawing which shows an example of the masking process in the case of the blasting process of FIG. 図３のブラスト処理に際してのマスキング処理の別の例を示す図で、（Ａ）はその斜視図、（Ｂ）は同図（Ａ）のａ−ａ線に沿う拡大断面説明図。It is a figure which shows another example of the masking process in the case of the blasting process of FIG. 3, (A) is the perspective view, (B) is expanded sectional explanatory drawing along the aa line | wire of the same figure (A). 図１の車体組立工程におけるセルフピアスリベット結合状態を示す図で、（Ａ）はパネル部品の概略を示す斜視図、（Ｂ）は同図（Ａ）のｂ２−ｂ２線に沿う拡大断面説明図。It is a figure which shows the self-piercing rivet coupling | bonding state in the vehicle body assembly process of FIG. 1, (A) is a perspective view which shows the outline of a panel component, (B) is expanded sectional explanatory drawing which follows the b2-b2 line | wire of the same figure (A). . 図１のブラスト処理工程Ｓ４における処理の詳細を示す図で、同図（Ａ）はパネル部品の概略を示す斜視図、（Ｂ）は同図（Ａ）のｂ３−ｂ３線に沿う拡大断面説明図。It is a figure which shows the detail of the process in the blasting process S4 of FIG. 1, the same figure (A) is a perspective view which shows the outline of a panel component, (B) is expanded sectional explanation along the b3-b3 line | wire of the same figure (A). Figure. 図８のブラスト処理の詳細を示す拡大説明図。FIG. 9 is an enlarged explanatory view showing details of the blasting process of FIG. 8. 図７のセルフピアスリベット接合に接着剤を併用した場合のブラスト処理の詳細を示す拡大説明図。FIG. 8 is an enlarged explanatory view showing details of a blasting process when an adhesive is used in combination with the self-piercing rivet bonding of FIG. 7.

符号の説明Explanation of symbols

１…アルミ鋳物部品
２…一方の部材としての鋼板部品
３…セルフピアスリベット
４…パネル部品
５…セルフピアスリベット接合部
７…金属製シート（マスキングシート）
１１…把持治具（マスキング治具）
１２…エンボス部
１３…接着剤
Ｂｓ１…ショットブラスト処理領域
Ｂｓ２…ショットブラスト処理領域
Ｓ２…前処理工程としてのブラスト処理工程
Ｓ３…リベット接合工程としての車体組立工程
Ｓ４…後処理工程としてのブラスト処理工程 DESCRIPTION OF SYMBOLS 1 ... Aluminum casting part 2 ... Steel plate part as one member 3 ... Self-piercing rivet 4 ... Panel part 5 ... Self-piercing rivet joint 7 ... Metal sheet (masking sheet)
11 ... Gripping jig (masking jig)
DESCRIPTION OF SYMBOLS 12 ... Embossed part 13 ... Adhesive Bs1 ... Shot blast processing area | region Bs2 ... Shot blast processing area | region S2 ... Blast processing process as a pre-processing process S3 ... Car body assembly process as a rivet joining process S4 ... Blast processing process as a post-processing process

Claims (8)

一方の部材とアルミ鋳物部品とをセルフピアスリベットにて締結・接合する工程を含むパネル部品の組立方法であって、
上記アルミ鋳物部品の素地のうちセルフピアスリベット接合部以外の領域に予めブラスト処理を施す前処理工程と、
上記ブラスト処理が施されていないセルフピアスリベット接合部を非合わせ面として一方の部材とアルミ鋳物部品とを重ね合わせた上で、上記セルフピアスリベット接合部にセルフピアスリベットを打ち込んで両者を締結・接合するリベット接合工程と、
上記アルミ鋳物部品の素地のうちセルフピアスリベットをもって締結・接合されたセルフピアスリベット接合部にブラスト処理を施す後処理工程と、
を含むことを特徴とするパネル部品の組立方法。 A method of assembling a panel part including a step of fastening and joining one member and an aluminum cast part with a self-piercing rivet,
A pre-processing step of performing a blasting process in advance on a region other than the self-piercing rivet joint in the base of the aluminum casting part;
The self-piercing rivet joint that has not been subjected to the blasting process is used as a non-mating surface and one member and an aluminum casting part are overlapped, and then the self-piercing rivet joint is driven into the self-piercing rivet joint to fasten both. Rivet joining process to join,
A post-processing step of performing a blasting process on a self-piercing rivet joint portion which is fastened and joined with a self-piercing rivet among the base material of the aluminum casting part;
A method for assembling a panel part, comprising: 上記リベット接合工程では、アルミ鋳物部品のセルフピアスリベット接合部側が凸形状となるように一方の部材側からアルミ鋳物部品に向けてセルフピアスリベットを打ち込むことを特徴とする請求項１に記載のパネル部品の組立方法。   2. The panel according to claim 1, wherein in the rivet joining step, the self-piercing rivet is driven from one member side toward the aluminum casting part so that the self-piercing rivet joining part side of the aluminum casting part has a convex shape. How to assemble parts. 上記リベット接合工程では、
一方の部材とアルミ鋳物部品とを間に接着剤を介在させた状態でセルフピアスリベットの打ち込みを行う一方、
上記後処理工程では接着剤のはみ出し部位にもブラスト処理を施すことを特徴とする請求項１または２に記載のパネル部品の組立方法。 In the rivet joining process,
While driving the self-piercing rivet with an adhesive interposed between one member and the aluminum casting part,
The panel component assembling method according to claim 1 or 2, wherein in the post-processing step, a blasting process is also performed on the protruding portion of the adhesive. 一方の部材が鋼板部品であることを特徴とする請求項３に記載のパネル部品の組立方法。   4. The method of assembling a panel part according to claim 3, wherein the one member is a steel plate part. 少なくとも前処理工程でのブラスト処理は非処理対象領域にマスキングを施した上で行うことを特徴とする請求項請求項１〜４のいずれかに記載のパネル部品の組立方法。   5. A method of assembling a panel part according to claim 1, wherein at least the blasting process in the pre-processing step is performed after masking the non-processing target area. ブラスト処理がショットブラスト処理であることを特徴とする請求項１〜５のいずれかに記載のパネル部品の組立方法。   6. The panel component assembling method according to claim 1, wherein the blasting process is a shot blasting process. 上記後処理工程に続いて少なくともセルフピアスリベット接合部を含むアルミ鋳物部品の表面に塗装を施す塗装工程を含むことを特徴とする請求項１〜６のいずれかに記載のパネル部品の組立方法。   The panel component assembling method according to any one of claims 1 to 6, further comprising a coating step of coating the surface of the cast aluminum component including at least the self-piercing rivet joint portion after the post-processing step. 一方の部材とアルミ鋳物部品とを重ね合わせた上でその重合部に一方の部材側からセルフピアスリベットを打ち込んで、アルミ鋳物部品側が凸形状となるように塑性変形させながら両者を締結・接合してなるパネル部品であって、
セルフピアスリベット接合後に、凸形状となったセルフピアスリベット接合部を含むアルミ鋳物部品の表面にショットブラスト処理を施してあることを特徴とするパネル部品。 After superposing one member and an aluminum casting part, the self-piercing rivet is driven into the overlapped part from one member side, and the two parts are fastened and joined while plastic deformation so that the aluminum casting part side has a convex shape. Panel parts
A panel part characterized in that after self-piercing rivet joining, a surface of an aluminum casting part including a convex self-piercing rivet joining part is subjected to shot blasting.
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
US10538686B2 (en) 2017-09-27 2020-01-21 Honda Motor Co., Ltd. Multi-material assembly and methods of making thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10538686B2 (en) 2017-09-27 2020-01-21 Honda Motor Co., Ltd. Multi-material assembly and methods of making thereof
US11193045B2 (en) 2017-09-27 2021-12-07 Honda Motor Co., Ltd. Multi-material assembly and methods of making there of

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