CN103395448A - Top cover beam structure and ship type electrophoresis method - Google Patents
Top cover beam structure and ship type electrophoresis method Download PDFInfo
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- CN103395448A CN103395448A CN2013103317979A CN201310331797A CN103395448A CN 103395448 A CN103395448 A CN 103395448A CN 2013103317979 A CN2013103317979 A CN 2013103317979A CN 201310331797 A CN201310331797 A CN 201310331797A CN 103395448 A CN103395448 A CN 103395448A
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Abstract
The invention provides a top cover beam structure. The cross section of the top cover beam structure is in a shape of a Chinese character 'Ji' and is provided with a front vertical face, a back vertical face and a top face. The front vertical face and the back vertical face expand to form one prismatic table or a plurality of prismatic tables at intervals. The included angle alpha between the front prismatic table face and the top face and between the back prismatic table face and top face meets the inequation that 120 degrees<=alpha<180 degrees. The invention further discloses a method for conducting electrophoresis on the car body of the top cover beam. The top cover beam structure and the ship type electrophoresis method eliminate the problem of cavitation of ship type electrophoresis so as to avoid a large amount of investment needed by improvement of ship type electrophoresis production lines.
Description
Technical field
The present invention relates to automotive field, be specifically related to a kind of roof panel cross member structure and reach the method for automobile being carried out to " ship " formula electrophoresis.
Background technology
At present, that the body in white electrophoresis method of main flow has is convertible, two kinds of " ship " formulas (be also referred to as suspension type, widespread use be the fork chain type).In convertible electrophoresis process, body in white overturns in electrophoresis tank, and body in white enters at a certain angle groove, goes out groove but do not overturn in " ship " formula electrophoresis process.At " Automobile Technology and Material ", 2006 (1): 38-40, the author: brave Li Wen is firm for high one-tenth, autograph: in the article of " application of overturn of vehicle body conveying technology in pre-processing and electrophoresis process ", the author contrasts two kinds of electrophoretics, discussed the plurality of advantages of convertible electrophoresis, and proposition " ship " formula electrophoresis can't be eradicated roof gas bag (air pocket) problem.
But, at first, because " boat form " electrophoresis adopts on a large scale, thereby by the electrophoresis manufacturing line is transformed, eliminate air pocket and must bring huge improvement expenses, secondly, although convertiblely can eliminate air pocket, but white vehicle body lower part electrophoresis thickness deficiency, electrophoresis is abundant not as " ship " formula.
From the electrophoresis scene, when " ship " formula of employing electrophoresis, a large amount of gas can accumulate in back part of top cover, and cavitation is comparatively serious.Therefore at application number: 201210036080.7, the applying date: 2012-02-17, denomination of invention is in the Chinese invention patent application of " a kind of automobile roof beam ", by logical liquid bath is set on the overlap joint flange in the roof panel cross member both sides, make battery acid flow into rapidly the cavity between roof panel cross member and top cover, and therefrom flow out fast.this is conducive to eliminate the air pocket between roof panel cross member and top cover, but, because roof panel cross member generally has " several " font, expansion angle between its front facade and rear facade is unsuitable excessive, be generally 10-40 degree (being namely 95 ° to 110 ° with the end face angle), otherwise will affect structural strength, and the vehicle body of " ship " formula electrophoresis enters groove, go out the general maximum of the angle of the v-groove and be no more than 45 degree, therefore below roof panel cross member, can accumulate a part of gas can't discharge, so the cavitation of roof panel cross member is the most serious, part is even without electrocoating film, adopt the disclosed technical scheme of above-mentioned patent document also can't solve the air pocket problem of roof panel cross member.
Summary of the invention
The objective of the invention is customer service the problems referred to above, change by the change to the roof panel cross member shape and electrophoresis method solves the air pocket problem of " ship " formula electrophoresis, guarantee the good electrophoresis thickness quality of vehicle body, thereby having avoided existing " ship " formula electrophoresis improvement of manufacturing line is the required huge input of convertible electrophoresis, reduces production costs.
For achieving the above object, the invention provides following technical scheme:
A kind of roof panel cross member structure, its cross-sectional plane is " several " font with front facade, rear facade and end face, described front facade and described rear facade are partly expanded the terrace with edge that forms one or more space, and the front terrace with edge face of described terrace with edge and the angle α between rear terrace with edge face and described end face meet with lower inequality:
135°≤α＜180°。
Preferably, described terrace with edge is arranged in the middle part of described roof panel cross member.
Preferably, described terrace with edge width is 5mm to 10mm.
Preferably, on the overlap joint flange of described roof panel cross member both sides, be provided with logical liquid bath, described logical liquid bath is communicated with described terrace with edge.
A kind of method of the vehicle body with roof panel cross member as above being carried out to " boat form " electrophoresis, the step that comprises has: vehicle body enters groove; Electrophoresis; Vehicle body goes out groove; After when vehicle body enters groove, guaranteeing, the terrace with edge face is parallel with horizontal surface, and before when vehicle body goes out groove, guaranteeing, the terrace with edge face is parallel with horizontal surface.
Beneficial effect of the present invention is:
Because front facade and the rear facade of roof panel cross member are partly expanded formation terrace with edge shape, and most of front facade and rear facade have kept less expansion angle, so the structural strength of roof panel cross member can't reduce.And, because front terrace with edge face and rear terrace with edge face and end face angle are at least 135 ° and less than 180 ° (in fact, reaching or surpassing the situation of 180 ° is impossible occur), thereby, for existing " ship " formula electrophoresis, without the electrophoresis manufacturing line is transformed, before in the time of can guaranteeing that vehicle body enters groove, the terrace with edge face is parallel with horizontal surface, after when vehicle body goes out groove, the terrace with edge face is parallel with horizontal surface, therefore in whole electrophoresis process, roof panel cross member below can air accumulation, has avoided the air pocket generation.
Further, the terrace with edge middle part that is arranged in roof panel cross member is conducive to the overflowing of air of the terrace with edge both sides of roof panel cross member below.
Further, the terrace with edge width is 5mm to 10mm, for general vehicle, both has been unlikely to too large and affect structural strength, is unlikely to again too little and makes air be difficult for discharge.
Further, logical liquid bath is communicated with terrace with edge, can one-shot forming in punching course, both eliminated the air pocket below roof panel cross member, and eliminated again the air pocket between roof panel cross member and top cover.
The accompanying drawing explanation
Fig. 1 is convertible electrophoresis process schematic diagram;
Fig. 2 is " ship " formula electrophoresis process schematic diagram;
Fig. 3 is the roof panel cross member schematic diagram of embodiments of the invention;
Fig. 4 is the part amplification stereogram of the C part in Fig. 3;
Fig. 5 is the viewgraph of cross-section along the B-B line in Fig. 3;
Fig. 6 is the viewgraph of cross-section along the A-A line in Fig. 3;
Fig. 7 is that the vehicle body with roof panel cross member structure of prior art enters groove process schematic diagram;
Fig. 8 is that the vehicle body with roof panel cross member structure of prior art goes out groove process schematic diagram;
Fig. 9 is that the vehicle body with roof panel cross member structure of embodiments of the invention enters groove process schematic diagram;
Figure 10 is that the vehicle body with roof panel cross member structure of embodiments of the invention enters groove process schematic diagram;
Description of symbols in upper figure: before 1-terrace with edge, 12-after terrace with edge face, 13-before terrace with edge face, 2-after facade, 3-facade, 4-end face, 5-overlap flange.
The specific embodiment
In conjunction with Fig. 1, Fig. 2, it shows respectively convertible electrophoresis process and " ship " formula electrophoresis process of body in white.As seen from Figure 1, when convertible electrophoresis, body in white when advancing in battery acid at least one week of direction upset as shown by the arrows in Figure 1, this process can guarantee that the air at each position of body in white all is discharged from, can not produce cavitation, there is the shortcoming of the electrophoresis thickness deficiency of white vehicle body lower part in convertible electrophoresis but simultaneously.As seen from Figure 2, when " ship " formula electrophoresis, according to arrow direction in Fig. 2, body in white enters groove at a certain angle, after immersing battery acid fully, then goes out at a certain angle groove, generally enter groove, go out the angle of the v-groove select 30 ° to 45 ° (if angle more greatly vehicle body can overturn), this process guarantees that the whole electrophoresis of body in white is abundant, but the air at vehicle body top is not easy to discharge, and " air pocket " phenomenon easily occurs.Because the time that " ship " formula electrophoretic techniques occurs will be early than convertible electrophoretic techniques, and consider still to be widely adopted so far for the equipment cost problem, therefore for a lot of car production manufacturer, in order to solve the air pocket problem, transform whole piece electrophoresis manufacturing line and do not calculate, because this means huge fund input, thereby improve the car production cost.
In conjunction with Fig. 3, Fig. 4, Fig. 5 and Fig. 6.Roof panel cross member is blanked part, and the centre of base portion is protuberance upwards, makes the cross-sectional plane of roof panel cross member be " several " font with front facade 2, rear facade 3 and end face 4, and both sides also have overlap joint flange 5.In prior art, the width of the whole protuberance of roof panel cross member is the same, namely with any straight line that is parallel to the B-B line, cuts roof panel cross member, and resulting viewgraph of cross-section all as shown in Figure 5.In Fig. 5, the folded angle of the angle that front facade 2 and end face 4 are folded and rear facade 3 and end face 4 is β, under perfect condition, β=90 °, but from the angle of reality processing, β can be greater than 95 °, but can not be greater than 110 °, (suppose that angle reaches the limit words of 180 ° and in fact just becomes one flat plate) because angle is excessive means that structural strength can the out of reach requirement, or size becomes large, weight increase.In conjunction with Fig. 3, Fig. 4 and Fig. 6, visible at preposition, front facade 2 and rear facade 3 form a terrace with edge 1 towards the two side portions expansion, perhaps also can form in different position expansions a plurality of terrace with edges 1 of space, the quantity of terrace with edge is more, more be beneficial to the discharge (this point will be described hereinafter) of roof panel cross member air, but simultaneously, terrace with edge too much can cause structural strength obviously descend (under limiting conditions, the quantity of terrace with edge 1 too much can cause all terrace with edges 1 large to the change that causes together the β angle continuously).From more high-visible Fig. 6, the cross-sectional plane at terrace with edge 1 place, the angle between the angle between front terrace with edge face 12 and end face 5 and rear terrace with edge face 13 and end face 5 is α, and α meets inequality:
135°≤α＜180°。That is to say, in the position of terrace with edge 1, shown in broken lines in the relatively front facade 2(of front terrace with edge face 12 Fig. 6), rear terrace with edge face 13 is shown in broken lines in facade 3(Fig. 6 after relatively) expansion.And can find out in Fig. 3, terrace with edge 1 is positioned at the middle part of roof panel cross member, the air that this means the roof panel cross member below can overflow from terrace with edge 1 more fifty-fifty, and in the electrophoresis process of following described embodiments of the invention, at vehicle body, enter in the groove process, the air of terrace with edge 1 both sides on average overflows and makes the stressed more balanced of roof panel cross member, and electrophoresis process is more steady.
In conjunction with Fig. 7, Fig. 8, it has shown under prior art, and during without terrace with edge 1 structure, body in white enters the groove process and goes out the air pocket moving process of roof panel cross member in the groove process.In Fig. 7 and Fig. 8, with many dotted lines that are parallel to horizontal surface, represent the battery acid in electrophoresis tank.In Fig. 7, vehicle body enters electrophoresis tank according to direction shown in arrow in figure, as what in Fig. 2, illustrate equally, enters the angle of the v-groove and be 45 degree, and those of ordinary skills can imagine at an easy rate, and the end face 4 of roof panel cross member is basically parallel to this direction.In entering the groove process, at first front facade 2 contacts battery acid, then along with vehicle body advances, and the Bas Discharged of battery acid extruding roof panel cross member below.But, due to the angle of β between 95 ° to 110 °, that is to say, at battery acid, do not reach between the junction, turning of end face 4 and rear facade 3, rear facade 3 just starts to contact with battery acid, thereby the space inner sealing between end face 4 and rear facade 3 portion of air, form the air pocket as shown in dash area in Fig. 7.After vehicle body immersed the electrophoresis that battery acid carries out a period of time fully, vehicle body went out groove as shown in Figure 8.In Fig. 8, vehicle body leaves electrophoresis tank according to direction shown in arrow in figure, as what in Fig. 2, illustrate equally, goes out the angle of the v-groove and be 45 degree, and those of ordinary skills can imagine at an easy rate, and the end face 4 of roof panel cross member is basically parallel to this direction.At vehicle body, have and enter the process that go out groove direction of groove direction in changing Fig. 8 in Fig. 7, the air that the roof panel cross member below is sealed can move along end face 4, finally remain between end face 4 and front facade 2, until leave battery acid, as shown as the dash area in Fig. 8.That is to say, in whole electrophoresis process, the overlapping part of the dash area in Fig. 7 and the dash area in Fig. 8 does not touch battery acid always.
In conjunction with Fig. 9, Figure 10, it has shown in an embodiment of the present invention, and terrace with edge 1 position body in white enters groove and goes out the electrophoresis situation of roof panel cross member in the groove process.With Fig. 7 and Fig. 8 similarly, in Fig. 9 and Figure 10, with many dotted lines that are parallel to horizontal surface, represent the battery acid in electrophoresis tank.As can be seen from Fig. 9, although vehicle body still enters groove with 45° angle, but the position at terrace with edge 1, because the angle α between rear terrace with edge face 3 and end face 4 has reached 135 °, therefore after, terrace with edge face 3 is parallel with horizontal surface, that is to say, battery acid is that continuous dip is crossed front terrace with edge face 2, end face 4 and rear terrace with edge face 3, and can be between rear terrace with edge face 3 and end face 4 air accumulation.Vehicle body immerses battery acid fully and carries out electrophoresis.Similarly, illustrated in fig. 10, go out the groove process, can guarantee can air accumulation between front terrace with edge face 2 and end face 4 yet.Although in other position except terrace with edge 1 on roof panel cross member, enter groove, to go out the groove process still similar with the process shown in Fig. 7 and Fig. 8, but, at vehicle body, enter in the process of electrophoresis tank, be subject to the extruding of battery acid, the air of other position can collect towards terrace with edge 1 place, finally still can discharge from terrace with edge 1, guarantee that the roof panel cross member below is without air pocket.That is to say, at vehicle body, enter groove, electrophoresis, go out in the whole process of groove, roof panel cross member below can't air accumulation, also just can not produce air pocket.Those of ordinary skills can imagine at an easy rate, if the angle of the v-groove that enters of vehicle body diminishes (but generally not can less than 30 °), increase the angle of angle α, can guarantee equally groove, go out in the groove process after terrace with edge face 3, front terrace with edge face 2 maintenance levels.Perhaps, in the situation that it is certain to enter the angle of the v-groove, while for example being 45 °, increase α, for example increase to 140 degree this moment, can guarantee equally can not produce air pocket.But, as mentioned above, from physical significance but not on mathematical meaning, angle [alpha] can not infinitely increase, can not meet or exceed 180 °.And, for a certain, enter the angle of the v-groove, as long as after guaranteeing, terrace with edge face 3 is parallel with horizontal surface, both can eliminate air pocket, go out the groove situation similar with it, and if continue the value of increase α, the structural strength at terrace with edge 1 place can diminish, as long as therefore guarantee when electrophoresis, as long as after when vehicle body enters groove, guaranteeing, terrace with edge face 3 is parallel with horizontal surface, before when vehicle body goes out groove, guaranteeing, terrace with edge face 2 is parallel with horizontal surface, can reach and both guarantee to eliminate air pocket, guarantee again the optimal objective of structural strength.
Refer again to Fig. 4, the width of visible terrace with edge 1 is 5mm to 10mm, and this scope is a preferred value, because excessive or too smallly all can the optimum assembly between structural strength and exhaust effect be had a negative impact.
Those of ordinary skills can imagine at an easy rate, as what in background technology, introduce, on the overlap joint flange 5 of roof panel cross member both sides, can also be provided with logical liquid bath (not shown), and logical liquid bath is communicated with terrace with edge 1, do like this air pocket that can eliminate simultaneously between roof panel cross member below, roof panel cross member and top cover, and this structure is simpler for the diel moulding.
In sum, the present invention has eliminated cavitation by the improvement of the structure to roof panel cross member itself and the improvement of electrophoresis process method, and needn't existing " ship " formula electrophoresis manufacturing line be transformed, avoid huge fund input, thereby reduced the car production cost.
Although the present invention is described in conjunction with above embodiment, but the present invention is not limited to above-described embodiment, and only being subjected to the restriction of claim, those of ordinary skills can easily modify to it and change, but do not leave essence design of the present invention and scope.
Claims (5)
1. roof panel cross member structure, its cross-sectional plane is " several " font with front facade, rear facade and end face, it is characterized in that, described front facade and described rear facade are partly expanded the terrace with edge that forms one or more space, and the front terrace with edge face of described terrace with edge and the angle α between rear terrace with edge face and described end face meet with lower inequality:
135°≤α＜180°。
2. roof panel cross member structure according to claim 1, is characterized in that, described terrace with edge is arranged in the middle part of described roof panel cross member.
3. roof panel cross member structure according to claim 1, is characterized in that, described terrace with edge width is 5mm to 10mm.
4. the described roof panel cross member structure of any one according to claim 1 to 3, is characterized in that, on the overlap joint flange of described roof panel cross member both sides, is provided with logical liquid bath, and described logical liquid bath is communicated with described terrace with edge.
5. one kind to having the method for carrying out " boat form " electrophoresis as the vehicle body of the described roof panel cross member of any one in claim 1 to 4, and the step that comprises has:
Vehicle body enters groove;
Electrophoresis;
Vehicle body goes out groove;
It is characterized in that, when vehicle body enters groove, guarantee that described rear terrace with edge face is parallel with horizontal surface, when vehicle body goes out groove, guarantee that described front terrace with edge face is parallel with horizontal surface.
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| CN201310331797.9A CN103395448B (en) | 2013-08-01 | 2013-08-01 | A kind of roof panel cross member structure and boat form electrophoresis method |
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| CN201310331797.9A CN103395448B (en) | 2013-08-01 | 2013-08-01 | A kind of roof panel cross member structure and boat form electrophoresis method |
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Citations (8)
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|---|---|---|---|---|
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| JPS56141883A (en) * | 1980-04-05 | 1981-11-05 | Nippon Parkerizing Co Ltd | Pretreatment and device for sheet metal structure before coating |
| JP3162853B2 (en) * | 1993-02-15 | 2001-05-08 | 本田技研工業株式会社 | Dipping processing equipment |
| CN201165256Y (en) * | 2007-12-31 | 2008-12-17 | 比亚迪股份有限公司 | Vehicle body top cover |
| CN201762468U (en) * | 2010-08-16 | 2011-03-16 | 上海通用汽车有限公司 | Exhaust structure convenient for gluing and sealing |
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| CN102582692A (en) * | 2012-02-17 | 2012-07-18 | 重庆长安汽车股份有限公司 | Roof crossrail of automobile |
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2013
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1231260A (en) * | 1967-09-30 | 1971-05-12 | ||
| JPS56133494A (en) * | 1980-03-24 | 1981-10-19 | Mitsubishi Motors Corp | Coating method and its device |
| JPS56141883A (en) * | 1980-04-05 | 1981-11-05 | Nippon Parkerizing Co Ltd | Pretreatment and device for sheet metal structure before coating |
| JP3162853B2 (en) * | 1993-02-15 | 2001-05-08 | 本田技研工業株式会社 | Dipping processing equipment |
| CN201165256Y (en) * | 2007-12-31 | 2008-12-17 | 比亚迪股份有限公司 | Vehicle body top cover |
| CN101934821B (en) * | 2009-10-16 | 2012-05-23 | 上汽通用五菱汽车股份有限公司 | Top beam structure for improving strength of top cover |
| CN201762468U (en) * | 2010-08-16 | 2011-03-16 | 上海通用汽车有限公司 | Exhaust structure convenient for gluing and sealing |
| CN102582692A (en) * | 2012-02-17 | 2012-07-18 | 重庆长安汽车股份有限公司 | Roof crossrail of automobile |
Non-Patent Citations (2)
| Title |
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| 宗言峰，华云: "浅谈汽车顶盖横梁结构对涂装电泳的影响", 《现代涂装》, vol. 15, no. 12, 31 December 2012 (2012-12-31) * |
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Address after: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee before: Anhui Jianghuai Automotive Co., Ltd. |
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