CN103738399A - Front subframe and producing method thereof - Google Patents
Front subframe and producing method thereof Download PDFInfo
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- CN103738399A CN103738399A CN201410015062.XA CN201410015062A CN103738399A CN 103738399 A CN103738399 A CN 103738399A CN 201410015062 A CN201410015062 A CN 201410015062A CN 103738399 A CN103738399 A CN 103738399A
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- 238000000034 method Methods 0.000 title claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000004080 punching Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000002355 dual-layer Substances 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 abstract description 36
- 238000010586 diagram Methods 0.000 description 4
- 238000005476 soldering Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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Abstract
The invention provides a front subframe comprising an upper plate and a lower plate which are connected to form a front subframe body, and a front component used for connecting the front subframe body to a vehicle. A lower swing arm front mounting support and a lower swing arm rear mounting portion are arranged between the upper plate and the lower plate on the left and right sides of the front subframe body. The front component and a front mounting support are punched and formed integrally. The front wall of the front mounting support is welded to the upper plate or the lower plate, and the bottom wall is connected to the lower plate in welded manner so that a front-rear double-layered reinforcing structure and an upper-lower double-layered reinforcing structure are formed. The invention further provides a method for producing the front subframe. The front subframe has the advantages of high strength, convenience of welding and high positioning accuracy.
Description
Technical field
The present invention relates to automobile chassis frame field.
Background technology
Fore sub frame is as load bearing component important on automobile, and a plurality of parts of support and connection automobile, comprise the critical components such as steering hardware, dynamic assembly, stabilizer rod assembly.Its fatigue life, dimensional accuracy play vital effect to the performance of the safety of car load and vehicle performance.
There is two kinds of Casting Parts and sheet material weldments in fore sub frame, rear a kind ofly adopted more and more widely owing to thering is good fuel economy, and automobile in the process of moving unavoidably owing to starting to walk frequently, brake, acceleration and deceleration, jolting produces the power of fore-and-aft direction, the power of the power of left and right directions, above-below direction, by suspension lower swing arm, be delivered to fore sub frame, for simplicity, in accompanying drawing, only indicate the power F of fore-and-aft direction.But because sheet material itself is thinner, and the edge of the upper and lower plate left and right sides is generally irregular shape, causes the problems such as upper and lower plate fatigue cracking, therefore making great efforts to improve the structure of fore sub frame always, technical personnel solves this problem.Prior art as shown in Figure 1, fore sub frame is connected together and forms fore sub frame main body 100 with lower plate 102 by upper plate 101, the form of the rear installation portion 104 forming between mounting bracket 103 and upper and lower plate before the forward and backward attachment point of the lower swing arm (not shown) of the left and right sides of fore sub frame 100 adopts respectively.Lower swing arm connects steering swivel, wheel again.Then, fore sub frame main body 100 is connected with vehicle body by front side member 105.Yet, going out as shown in Figure 1, front mounting bracket 103, front side member 105 are mutual incoherent independent members, for consideration easy for installation, 105 of front side members are welded to connect with upper plate 101 or lower plate 102.Visible in Fig. 1, front side member 105 is to be welded to connect with lower plate 102, and then upper plate 101 is welded to connect with lower plate 102 and the front mounting bracket 103 of part covering, and this mounting means is more clear illustrating in Fig. 4, and front mounting bracket 103 is individual layer force structure.Fig. 2 improves to improve by the welded lap structure at the A-A line place of cutting open to along in Fig. 1 a kind of trial that is subject to force intensity, front mounting bracket 103 is the outsides that are welded on fore sub frame main body 100, it is the only front mounting bracket 103 of part covering of upper plate 101, from different in Fig. 1 be, lower plate 102 is to be resisted against on the rear wall of front mounting bracket 103 to weld, simultaneously in order to improve near the force intensity that is subject to of the fore sub frame main body 100 of front mounting bracket 103, thereby between upper plate 101 and lower plate 102, welding a fagging 106 makes upper plate 101 and lower plate 102 become a kind of opening box-like structure.This welding structure, met the requirement of strength of fore sub frame main body 100, but own for front mounting bracket 103, still only has a front side wall through stressed F, for individual layer force structure, the structural strength of itself is not high, and yet more complicated of this welding structure, the position of weld of front mounting bracket 103 is also more random, and positioning precision is not high.Meanwhile, this structure is also to carry out according to the sequence of welding in Fig. 4, therefore welding also between visible fagging 106 and upper plate 101, and also welding between front mounting bracket 103 and upper plate, intensity is not high.
In order to improve the force intensity that is subject to of fore sub frame main body 100 and front mounting bracket 103 simultaneously, a kind ofly structurally carry out improved trial and be illustrated in Fig. 3.In this structure, front mounting bracket 103 is between upper plate 101 and lower plate 102, and near front mounting bracket 103, upper plate 101 and lower plate 102 are directly connected to form an opening box-like structure and without fagging 106, this has simplified welded structure.In the ideal situation simultaneously, the front side wall 1031 of front mounting bracket 103 can be welded to connect formation Double-layered reinforcing structure with upper plate 101 or lower plate 102, diapire 1032 can be welded to connect and also form Double-layered reinforcing structure with lower plate 102, thereby improved the be subject to force intensity of fore sub frame main body 100 with front mounting bracket 103 simultaneously, in other words, now before mounting bracket 103 become a reinforced support of upper plate 101 and lower plate 102.
But in actual production, this desirable structure is difficult to reach.First, before original, the positioning precision of mounting bracket 103 is just not high, and the soldering tip of welding robot is while stretching into the interior enforcement of front mounting bracket 103 welding, mounting bracket 103 before must touching, thereby cause unavoidably front mounting bracket 103 to move and further worsened positioning precision, and need because front side wall 1031 and diapire 1032 all exist welding, it is also unpractical therefore in narrow space, increasing fixing device again, this can hinder the action of welding robot soldering tip.For solving the difficult problem of welding, a kind of method that technical personnel is taked as shown in Figure 4, first front mounting bracket 103 is welded in lower plate 102, the location of mounting bracket 102 before realizing, thus and then upper plate 101 and lower plate 102 welding are clipped in front mounting bracket 103 between upper and lower plate.This sequence of welding also meets mechanical field and will technology from down to up, from inside to outside instruct for mechanical assembling sequence.But the problem of implementing the method is, it is the welding on a large scale of carrying out along two panel edges that upper plate 101 and lower plate 102 are welded, the welding manner, the welding robot that adopt when front mounting bracket 103 is welded are not identical, after the welding that completes upper plate 101 and lower plate 102, return again the front side wall 1031 of front mounting bracket 103 is welded obviously and can affect productive temp, and on manufacturing line, increase a welding position and increase that welding robot can bring productive costs.Therefore for cost-saving consideration, before completing after the positioning welding of mounting bracket 103 in lower plate 102, can not carry out again the welding of front side wall 1031, so in fact do not form desirable front and back Double-layered reinforcing structure, and just the upper plate 101 in Fig. 3 or front side wall 1031 stressed separately respectively, be for example to be born separately by upper plate 101 during power from front to back, and power is from back to front to be born separately by front side wall 1031, this has a greatly reduced quality the effort of technical personnel.Secondly, even if strengthen cost drops in order to solve Welding Problems, can not solve the independent front mounting bracket 103 inaccurate problems in location, if front mounting bracket 103 exists a large amount of welding can cause deformation of timbering and welding stress to be concentrated, this can make troubles to follow-up vehicle assembling.
Summary of the invention
The object of the invention is to address the above problem, provide a kind of and be subject to that force intensity is good, positioning precision is high, the structure of front auxiliary frame of convenient welding and manufacture method thereof.
For achieving the above object, embodiments of the invention provide following technical scheme:
A fore sub frame, comprising: thus connect together upper plate and the lower plate that forms fore sub frame main body, and in the left and right sides of described fore sub frame main body, between described upper plate and described lower plate, there is before lower swing arm installation portion after mounting bracket and lower swing arm; For described fore sub frame main body is connected to the front side member on vehicle body; Described front side member and the moulding of described front mounting bracket integrated punching, the front side wall of described front mounting bracket and described upper plate or lower plate is welded to connect, diapire and described lower plate be welded to connect to form before and after Double-layered reinforcing structure and Dual-layer strengthen structure.
Preferably, described upper plate has side opening, and described front side member lower end and described lower plate are welded to connect, and upper end extends up through described side opening.
Preferably, in described side opening place, state front side member and described upper plate is welded to connect.
Preferably, described front side member is trench structure.
Preferably, the common wall portion of described front side member and described front mounting bracket stamps out boss.
A fore sub frame manufacture method, comprising: by upper plate and lower plate formation fore sub frame welded together main body, and in upper plate both sides, reserve side opening; The front side member of integrated punching moulding and front mounting bracket are inserted from the side of described fore sub frame main body, make described front side member enter described side opening; By the front side wall of described front mounting bracket and described upper plate or lower plate be welded to connect form before and after Double-layered reinforcing structure, the diapire of described front mounting bracket and described lower plate are welded to connect and form Dual-layer reinforcement structure.
Preferably, in the end, in a step, the lower end of described front side member and described lower plate are welded to connect.
Preferably, after completing being welded to connect of the lower end of described front side member and described lower plate, also at described side opening place, described front side member and described upper plate are welded to connect.
Because front mounting bracket and front side member in the present invention are integrated punching moulding, and the installation of front side member need to be accurately corresponding with the attachment point on vehicle body, therefore front side member present position precision on fore sub frame is strict with at design phase, and the positioning precision of front mounting bracket is correspondingly met thus.Behind front side member location, the corresponding location of front mounting bracket, the welding of now carrying out diapire, front side wall can not cause the displacement of front mounting bracket again, just can realize two wall welding on a position of weld, thereby is easy to form front and back, Dual-layer reinforcement structure.
Further, adopt and carry out the installation of front side member in the mode of upper plate side opening, both convenient location, facilitated again the carrying out of follow-up welding.
Further, at side opening place, have being welded to connect of upper plate and front side member, the lower end of front side member and lower plate exist and are welded to connect simultaneously, front side member and upper and lower plate are formed and strengthen structure, have further improved the force intensity that is subject to of front mounting bracket.
Further, front side member is trench structure, makes after front side member and upper plate welding, and front mounting bracket is stressed obtains front side member buffering, and then is delivered to upper plate, lower plate, can reduce the stress at upper and lower panel edges place and concentrate, and reduces and tears probability.
Further, the existence of boss had both improved and had been subject to force intensity, can in subsequent installation process, adjust again grade size of opening of the front installation site of lower swing arm.
Accompanying drawing explanation
Next in connection with accompanying drawing, specific embodiments of the invention are described in further detail, wherein:
Fig. 1 is structure of front auxiliary frame schematic diagram of the prior art;
Fig. 2 is similar to the schematic diagram of cutting open along the A-A line in Fig. 1, has shown the front mounting bracket welded structure different from Fig. 1 of the prior art;
Fig. 3 is the front mounting bracket welded structure schematic diagram under perfect condition;
Fig. 4 shows the sequence of welding of fore sub frame in prior art;
Fig. 5 is the structural representation after front side member and the moulding of front mounting bracket integrated punching in embodiments of the invention;
Fig. 6 is the fore sub frame exploded view in embodiments of the invention;
Fig. 7 is the welded structure schematic diagram of front mounting bracket in embodiments of the invention.
Description of symbols in upper figure: fore sub frame main body 100, upper plate 101, lower plate 102, front mounting bracket 103, rear installation portion 104, front side member 105, fagging 106, side opening 1011, weld seam 1012, lower weld nugget 1021, front side wall 1031, diapire 1032, rear wall 1033, boss 1034, upper end 1051, lower end 1052, sidewall 1053, diapire 1054.
The specific embodiment
With reference to figure 5, visible front side member 105 and front mounting bracket 103 integrated punching moulding.Front mounting bracket 103 has front side wall 1031, diapire 1032 and rear wall 1033, and for front side member 105, it and front mounting bracket 103 have a common wall portion 1033, and this wall 1033 and another sidewall 1053 of front side member 105 are, the diapire 1054 of front side member 105 has formed a trench structure jointly.And the upper end 1051 of front side member 105 is for realizing and being connected of vehicle body, lower end 1052 has turnup structure for realizing the welding with lower plate 102.At the wall boss 1034 of having mended on 1033 also punching press place.
With reference to figure 6, be the fore sub frame exploded view in embodiments of the invention, shown the fore sub frame sequence of welding in embodiments of the invention simultaneously.
Identical with the structure shown in Fig. 1 is, thereby in the present embodiment, be also to connect together and form fore sub frame main body 100 with lower plate 102 by upper plate 101, and also have for fore sub frame main body being connected to the front side member 105 on vehicle body, after while lower swing arm, installation portion 104 is also by upper plate 101, lower plate 102 rear formation welded together.But different from structure shown in Fig. 1 to Fig. 5 is, the front side member 105 shown in Fig. 5 and the structure of front mounting bracket 103 integrated punching moulding in the structure shown in Fig. 6, have been adopted, and on upper plate 101, there is side opening 1011, compare with Fig. 4 thus, whole fore sub frame assembling sequence can be changed: be first upper plate 101 and lower plate 102 formation fore sub frame welded together main body 100, just formed like this box-like structure of a both-side opening between upper plate 101 and lower plate 102.Then the front side member of integrated punching moulding 105 and front mounting bracket 103 are inserted from the side of fore sub frame main body 100, make front side member 105 approaching side openings 1011, so just realized the location of front side member 105, correspondingly front mounting bracket 103 is also positioned.Because front side member 105 and the connection location of vehicle body need strict corresponding, therefore the positional precision of front side member 105 on whole subframe obtained strict guarantee in design phase, production phase, therefore the positioning precision of front mounting bracket 103 is also guaranteed, and can guarantee that power that front mounting bracket 103 is subject to due to reasons such as jolting of the external world is in the optimization in the path of transmitting to vehicle body through upper plate 101, lower plate 102, front side member 105.After this, even under the condition of front side member 105 not being welded, welding robot also can directly soldering tip be stretched into 103 pairs of front side walls 1031 of front mounting bracket and diapire 1032 welds, and also can not cause the displacement of front mounting bracket 103.In Fig. 6, only show weld nugget 1021 under diapire 1032 and lower plate 102 one group, and the weld nugget of also not shown front side wall 1031 and upper plate 101 or lower plate 102, but those of ordinary skills can imagine at an easy rate, front side wall 1031 can adopt same soldering tip, realize the welding with upper plate 101 or lower plate 102 in an identical manner.In addition, in fact front side member 105 and front mounting bracket 103 become a large member, therefore adapts to welding in a big way and not yielding.Certainly, for obtaining the better object that is subject to force intensity, preferably when diapire 1032 and lower plate 102 are welded, also the lower end 1052 of front side member 105 is welded with lower plate 102, therefore the lower weld nugget 1021 in Fig. 6 is two groups, simultaneously visible in conjunction with Fig. 7, after completing being welded to connect of lower end 1052 and lower plate 102, also, at side opening 1011 places, the bearing part of front side member 105 and upper plate 101 is welded to connect and forms weld seam 1012.Like this, upper plate 101, lower plate 102, front side member 105, front mounting bracket 103 have surrounded partial reinforced structure jointly.
With reference to figure 7, it more specifically shows has assembled near the structure of rear front mounting bracket 103.Visible upper plate 101 and lower plate 102 have realized and being welded to connect in front side wall 1031 the place aheads after bending, therefore front mounting bracket 103 has been clipped between upper plate 101 and lower plate 102 completely, and not the only part shown in Fig. 1, Fig. 2 cover.And, front side wall 1031 has formed actual front and back Double-layered reinforcing structure after being welded to connect with upper plate 101 or lower plate 102, the part and the front side wall 1031 that are upper plate 101 are jointly stressed, together with the Dual-layer reinforcement structure that is welded to connect formation with diapire 1032 and lower plate 102, the stress-bearing capability that has formed a desirable welded structure lower swing arm front portion is improved.Now, still with power F from front to back, analyze, known in front side, F is born jointly by upper plate 101 and front side wall 1031, and then a part is via diapire 1032 towards lower plate 102 decay, and a part is towards upper plate 101 decay.And at front side member 105 weld seam 1012 places with upper plate 101, first the part power of upper plate 101 is born by having larger area rear wall 1033, then the existence due to weld seam 1012 makes the edge of upper plate 101 easily occur that the intensity of the sharp change in elevation that stress is concentrated is higher, is not easy to occur cracking.And in power after the trench structure decay of front side member 105, also reduced power and continued along upper plate 101 edges the intensity in transmittance process backward, so the whole lateral edges of upper plate 101 is all not easy to produce and tears.
Although the present invention is described in conjunction with above embodiment, but the present invention is not limited to above-described embodiment, and being only subject 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 (8)
1. a fore sub frame, is characterized in that, comprising:
Thereby connect together the upper plate and the lower plate that form fore sub frame main body, and in the left and right sides of described fore sub frame main body, between described upper plate and described lower plate, there is before lower swing arm installation portion after mounting bracket and lower swing arm;
For described fore sub frame main body is connected to the front side member on vehicle body;
Described front side member and the moulding of described front mounting bracket integrated punching, the front side wall of described front mounting bracket and described upper plate or lower plate is welded to connect, diapire and described lower plate be welded to connect to form before and after Double-layered reinforcing structure and Dual-layer strengthen structure.
2. fore sub frame according to claim 1, is characterized in that, described upper plate has side opening, and described front side member lower end and described lower plate are welded to connect, and upper end extends up through described side opening.
3. fore sub frame according to claim 2, is characterized in that, states front side member and described upper plate is welded to connect in described side opening place.
4. fore sub frame according to claim 1, is characterized in that, described front side member is trench structure.
5. fore sub frame according to claim 1, is characterized in that, the common wall portion of described front side member and described front mounting bracket stamps out boss.
6. a fore sub frame manufacture method, is characterized in that, comprising:
By upper plate and lower plate formation fore sub frame welded together main body, and in upper plate both sides, reserve side opening;
The front side member of integrated punching moulding and front mounting bracket are inserted from the side of described fore sub frame main body, make described front side member enter described side opening;
By the front side wall of described front mounting bracket and described upper plate or lower plate be welded to connect form before and after Double-layered reinforcing structure, the diapire of described front mounting bracket and described lower plate are welded to connect and form Dual-layer reinforcement structure.
7. method according to claim 6, is characterized in that, described method also comprises:
The lower end of described front side member and described lower plate are welded to connect.
8. method according to claim 7, is characterized in that, described method also comprises:
After completing being welded to connect of the lower end of described front side member and described lower plate, at described side opening place, described front side member and described upper plate are welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410015062.XA CN103738399B (en) | 2014-01-13 | 2014-01-13 | A kind of fore sub frame and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410015062.XA CN103738399B (en) | 2014-01-13 | 2014-01-13 | A kind of fore sub frame and manufacture method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103738399A true CN103738399A (en) | 2014-04-23 |
| CN103738399B CN103738399B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410015062.XA Active CN103738399B (en) | 2014-01-13 | 2014-01-13 | A kind of fore sub frame and manufacture method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805143A (en) * | 2020-07-15 | 2020-10-23 | 安徽江淮汽车集团股份有限公司 | Positioning tool |
| CN112389182A (en) * | 2020-11-19 | 2021-02-23 | 东风(武汉)实业有限公司 | Engine bracket assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03246169A (en) * | 1990-02-23 | 1991-11-01 | Mazda Motor Corp | Suspension device of vehicle |
| CN2841461Y (en) * | 2005-11-01 | 2006-11-29 | 浙江吉利汽车研究院有限公司 | Auxiliary frame assembly |
| JP2013010419A (en) * | 2011-06-29 | 2013-01-17 | Honda Motor Co Ltd | Vehicle body front structure |
| CN203283293U (en) * | 2013-05-23 | 2013-11-13 | 上海汇众汽车制造有限公司 | Automobile auxiliary frame |
| CN103429484A (en) * | 2011-03-16 | 2013-12-04 | 双叶产业株式会社 | Suspension frame structure |
-
2014
- 2014-01-13 CN CN201410015062.XA patent/CN103738399B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03246169A (en) * | 1990-02-23 | 1991-11-01 | Mazda Motor Corp | Suspension device of vehicle |
| CN2841461Y (en) * | 2005-11-01 | 2006-11-29 | 浙江吉利汽车研究院有限公司 | Auxiliary frame assembly |
| CN103429484A (en) * | 2011-03-16 | 2013-12-04 | 双叶产业株式会社 | Suspension frame structure |
| JP2013010419A (en) * | 2011-06-29 | 2013-01-17 | Honda Motor Co Ltd | Vehicle body front structure |
| CN203283293U (en) * | 2013-05-23 | 2013-11-13 | 上海汇众汽车制造有限公司 | Automobile auxiliary frame |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805143A (en) * | 2020-07-15 | 2020-10-23 | 安徽江淮汽车集团股份有限公司 | Positioning tool |
| CN111805143B (en) * | 2020-07-15 | 2021-10-29 | 安徽江淮汽车集团股份有限公司 | Positioning tool |
| CN112389182A (en) * | 2020-11-19 | 2021-02-23 | 东风(武汉)实业有限公司 | Engine bracket assembly |
| CN112389182B (en) * | 2020-11-19 | 2022-03-01 | 东风(武汉)实业有限公司 | Engine bracket assembly |
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| Publication number | Publication date |
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| CN103738399B (en) | 2016-03-30 |
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