CN104554445A - Small gooseneck type combined welded aluminum alloy longitudinal beam for semitrailer - Google Patents
Small gooseneck type combined welded aluminum alloy longitudinal beam for semitrailer Download PDFInfo
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- CN104554445A CN104554445A CN201410834985.8A CN201410834985A CN104554445A CN 104554445 A CN104554445 A CN 104554445A CN 201410834985 A CN201410834985 A CN 201410834985A CN 104554445 A CN104554445 A CN 104554445A
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- wing plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
- B62D21/04—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members single longitudinal type
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- Auxiliary Methods And Devices For Loading And Unloading (AREA)
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Abstract
The invention discloses a small gooseneck type combined welded aluminum alloy longitudinal beam for a semitrailer. The small gooseneck type combined welded aluminum alloy longitudinal beam comprises a front upper beam, a middle neck beam and a rear lower beam, wherein the front upper beam is arranged as a double-web I-shaped beam and comprises a front upper wing plate, a front double-web plate and a front lower wing plate; the middle neck beam comprises at least two parallel like-right triangular web plates; the rear lower beam is arranged as an I-shaped beam and comprises a rear upper wing plate, a rear web plate and a rear lower wing plate; the right-angle sides I and II of the middle neck beam are respectively welded and fixed with the front end faces of the front lower wing plate and the rear lower beam; a gap matched with the front end of the rear lower beam is arranged at the tail end of the front upper beam; the front upper beam and the rear lower beam are welded and fixed through the matched gap. The aluminum alloy longitudinal beam for the semitrailer provided by the invention adopts a three-section type structure, so that the structural strength is enhanced, the manufacturing cost of the products is lowered and the driving safety is increased.
Description
Technical field
The invention belongs to transportation device FIELD OF THE INVENTIONThe, relate to a kind of aluminum alloy junction component, particularly a kind of superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron.
Background technology
Aluminum alloy density 2.7g/cm
3, be only 1/3 of steel, aluminum alloy corrosion resisting property is useful, and do not need any safeguard procedures to get final product long term maintenance any surface finish, aluminum alloy also has good welding and moulding processing characteristics in addition.For meeting the requirement of energy-saving and emission-reduction, automotive light weight technology has become the common recognition of auto trade, and uses aluminium alloy element to be the mode the most feasible of automobile lightweight in a large number.But intensity of aluminum alloy comparatively iron and steel is low, thus use by restriction to a certain extent.
Superimposed trailer is a kind of wide heavy duty transport vehicle used, for meeting requirement of strength, and current superimposed trailer many employings steel component; Though all aluminium alloy superimposed trailer product also appears in the newspapers, but also mainly rest in the aspect of tank truck and van, framework type container semi-trailer cannot be extended to, this is not mainly because framework type container semi-trailer car load has upper dress assembly, and frame assembly does not have collar tie beam and the parts such as floor and side crossbeam, the intensity of car load is born by longeron completely, significantly improves the requirement of strength of semi-trailer longitudinal beam, and the aluminum alloy longeron of ordinary construction cannot meet this requirement of strength.
The all aluminium alloy semi-trailer longitudinal beam structure that Vehicles Collected from Market circulates is as Fig. 1, shown in 2, all adopt disposable extrusion forming, this kind of vehicle intensity is poor, and manufacturing cost is higher, the framework type container conveying semi-trailer of such as 40 English Foot is also passable reluctantly when a transport 40 English Foot standard container, but when transporting two 20 English Foot freight containers at the same time, two 20 English Foot freight container midway location longerons can because there is gross distortion in undercapacity, time serious there is interference and collision phenomenon in container top, the lifting of freight container is made troubles, also hidden trouble is brought to the safety of car load.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron.
For achieving the above object, the invention provides following technical scheme:
Superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron, comprise front upper beam, middle neck beam and rear underbeam, described front upper beam is two web H-girders, comprise front upper flange, front two webs and front lower wing plate, described middle neck beam comprises at least two blocks of class right-angled triangle webs be arranged in parallel, described rear underbeam is H-girder, comprise rear upper flange, trailing web and rear lower wing plate, square edge I and II of described middle neck beam is welded and fixed with the front end face of front lower wing plate and rear underbeam respectively, described front upper beam end is provided with the breach matched with rear underbeam front end, described front upper beam and rear underbeam are welded and fixed by engages indentation.
Preferably, also comprise the two web T-shaped strength beams being arranged on middle neck beam bottom, this pair of web T-shaped strength beam comprises two sections, front and back, leading portion only comprises substrate, back segment comprises substrate and strengthens two web, and this T-shaped strength beam leading portion and middle neck beam hypotenuse are welded and fixed, and back segment and rear lower wing plate are welded and fixed.
Preferably, also comprise the brace panel be arranged on substrate, this brace panel rear end is welded on substrate surface, and front end extends to forward front lower wing plate bottom and is welded and fixed with it.
Preferably, be provided with stage casing riser between the front end face of described middle neck beam square edge II and rear underbeam, described square edge II and rear underbeam are welded and fixed with this stage casing riser respectively.
Preferably, described front upper beam and two web T-shaped strength beam end are respectively equipped with closure plate I and II, the side of described closure plate I and front pair of web seam, edge respectively with front upper flange and rear upper flange seam; Described closure plate II side with strengthen two web seam, edge respectively with substrate and rear lower wing plate seam.
Preferably, described middle neck beam is made up of the class right-angled triangle web that two pieces are parallel to each other, described class right-angled triangle web monolithic thickness is 8-12mm, such right-angled triangle web square edge I length is 400-500mm, square edge II length is 130-180mm, and described right-angled triangle web hypotenuse is round and smooth shape.
Preferably, described front upper beam length is 3150-3300mm, and sectional dimension is 175-215mm, and wherein, upper flange thickness is 14-17mm, two web thickness is 5-7mm before monolithic, and front lower wing plate thickness is 16-19mm.
Preferably, described rear lower beam length is 8000-12000mm, and sectional dimension is 340-400mm, and wherein, upper flange thickness is 14-17mm, trailing web thickness is 8-10mm, rear lower wing plate thickness is 16-19mm.
Preferably, described pair of web T-shaped strength beam length is 4000-5000mm, and described brace panel length is 2000-3000mm.
Preferably, described front upper beam, rear underbeam and two web T-shaped strength beam adopt extrusion process to obtain.
Beneficial effect of the present invention is:
1, of the present invention trailer longitudinal beam is divided into front upper beam, middle neck beam and rear underbeam three sections, compared with one straight beam, and comparatively front low more than the 100mm of upper beam in underbeam cargo carrying face thereafter, the center of gravity of goods effectively reduced, is conducive to traffic safety;
2, the front upper beam of the present invention and rear underbeam adopt direct extrusion forming, reduce longitudinal beam welding amount, contribute to improving its intensity and reducing welding deformation;
3, front upper beam is designed to two web H-girder by the present invention, effectively can reduce section bar sectional area when not reducing structural strength, thus avoids extruding the excessive problem causing extruding productive costs too high of tonnage;
4, the present invention is provided with two web T-shaped strength beam in rear underbeam bottom, can strengthen rear underbeam and middle neck beam intensity and and then underbeam sectional area after reducing;
5, the present invention is provided with reinforcement plate in T-shaped strengthened beam bottom further, can strengthen the anchoring strength of each several part.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is aluminum alloy trailer longitudinal beam constructional drawing in prior art;
Fig. 2 is A-A cutaway view in Fig. 1;
Fig. 3 is aluminum alloy trailer longitudinal beam structural assembly figure of the present invention;
Fig. 4 is B-B cutaway view in Fig. 3;
Fig. 5 is A-A cutaway view in Fig. 3;
Fig. 6 is C-C cutaway view in Fig. 3;
Fig. 7 is upper beam structure figure before the present invention;
Fig. 8 is A-A cutaway view in Fig. 7;
Fig. 9 is lower beam structure figure after the present invention;
Figure 10 is A-A cutaway view in Fig. 9;
Figure 11 is the class right-angled triangle web structure figure of neck beam in the present invention;
Figure 12 is T-shaped strength beam constructional drawing of the present invention;
Figure 13 is A-A cutaway view in Figure 12;
Figure 14 is T-shaped strength beam constructional drawing of the present invention;
Figure 15 is the birds-eye view of Figure 14.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Embodiment 1:
As shown in Fig. 3-15, the superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron of the present embodiment, comprise front upper beam 1, middle neck beam 2 and rear underbeam 3, described front upper beam 1 is two web H-girders, comprise front upper flange 1-1, front two web 1-2 and front lower wing plate 1-3, described middle neck beam 2 comprises at least two blocks of class right-angled triangle webs be arranged in parallel, described rear underbeam 3 is H-girder, comprise rear upper flange 3-1, trailing web 3-2 and rear lower wing plate 3-3, square edge I2-1 and II2-2 of described middle neck beam 2 is welded and fixed with the front end face of front lower wing plate 1-3 and rear underbeam 3 respectively, described front upper beam 1 end is provided with the breach 1-0 matched with rear underbeam 3 front end, described front upper beam 1 and rear underbeam 3 are welded and fixed by engages indentation 1-0.
In the present embodiment: also comprise the two web T-shaped strength beams 4 being arranged on middle neck beam 2 bottom, this pair of web T-shaped strength beam 4 comprises two sections, front and back, leading portion only comprises substrate 4-1, back segment comprises substrate 4-1 and strengthens two web 4-2, this T-shaped strength beam 4 leading portion and middle neck beam 2 hypotenuse 2-3 are welded and fixed, and back segment and rear lower wing plate 1-3 are welded and fixed.
In the present embodiment: also comprise the brace panel 5 be arranged on substrate 4-1, this brace panel 5 rear end is welded on substrate 4-1 surface, and front end extends to forward front lower wing plate 1-3 bottom and is welded and fixed with it.
In the present embodiment: be provided with stage casing riser 6 between the front end face of described middle neck beam 2 square edge II2-2 and rear underbeam 3, described square edge II2-2 and rear underbeam 3 are welded and fixed with this stage casing riser 6 respectively.
In the present embodiment: described front upper beam 1 and two web T-shaped strength beam 4 end are respectively equipped with closure plate I7 and II8, the side of described closure plate I7 and front couple of web 1-2 seam, edge respectively with front upper flange 1-1 and rear upper flange 3-1 seam; Described closure plate II8 side with strengthen two web 4-2 seam, edge respectively with substrate 4-) and rear lower wing plate 3-3 seam.
In the present embodiment: described middle neck beam 2 is made up of the class right-angled triangle web that two pieces are parallel to each other, described class right-angled triangle web monolithic thickness is 8-12mm, such right-angled triangle web square edge I2-1 length is 400-500mm, square edge II2-2 length is 130-180mm, and described right-angled triangle web hypotenuse 2-3 surface is in round and smooth shape.
In the present embodiment: described front upper beam 1 length is 3150-3300mm, and sectional dimension is 175-215mm, wherein, upper flange 1-1 thickness is 14-17mm, two web 1-2 thickness is 5-7mm before monolithic, and front lower wing plate 1-3 thickness is 16-19mm.
In the present embodiment: described rear underbeam 3 length is 8000-12000mm, and sectional dimension is 340-400mm, wherein, upper flange 3-1 thickness is 14-17mm, trailing web 3-2 thickness is 8-10mm, rear lower wing plate 3-3 thickness is 16-19mm.
In the present embodiment: described pair of web T-shaped strength beam 4 length is 4000-5000mm, and described brace panel 5 length is 2000-3000mm.
In the present embodiment: described front upper beam 1, rear underbeam 3 and two web T-shaped strength beam 4 adopt extrusion process to obtain.
In the present embodiment, superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron is divided into front upper beam, middle neck beam and rear underbeam three sections, compared with one straight beam, thereafter comparatively front low more than the 100mm of upper beam in underbeam cargo carrying face, the center of gravity of goods effectively reduced, is conducive to traffic safety; The front upper beam of the present embodiment and rear underbeam adopt direct extrusion forming, reduce longitudinal beam welding amount, contribute to improving its intensity and reducing welding deformation; Front upper beam is designed to two web H-girder by the present embodiment, effectively can reduce section bar sectional area when not reducing structural strength, thus avoids extruding the excessive problem causing extruding productive costs too high of tonnage; The present embodiment is provided with two web T-shaped strength beam in rear underbeam bottom, can strengthen rear underbeam and middle neck beam intensity and and then underbeam sectional area after reducing; The present embodiment is provided with reinforcement plate in T-shaped strengthened beam bottom further, can strengthen the anchoring strength of each several part.
This longeron of production the present invention only needs exploitation two kinds of small-sized extrusion dies, and extrusion press tonnage does not need very large (extrusion press tonnage is no more than 90MN) simultaneously, and extruding expense is very low.Mold developing expense does not count, and only extrudes expense and machine and adds two and just can reduce a bulk of cost.First generation car longeron extruding expense be (a computational back-end longeron cost): 11m × 32.153Kg/m × 9.5 yuan/Kg=3360 is first, machine adds expense: 3 hours × 300 yuan/hour=900 yuan, car load longeron (two pieces/platform) back segment cost=(3360+900) × 2=8520 unit; And longeron of new generation extruding pressure expense be (a computational back-end longeron cost): A section: 10m × 22.924Kg/m × 5.8 yuan/Kg=1329.59 is first, B section 4.86m × 16.779Kg/m × 5.8 yuan/Kg=472.97 unit machine adds expense: B section 2 hours * 150 yuan/hours=300 yuan, car load longeron back segment cost=(1329.59+472.97+300) * 2=4205.12 unit.The every chassis of only this item can reduce costs 4314.88 yuan, can get a net gain 862.896 ten thousand yuan by annual 2000 Production rate.
Because Automobile manufacturing adopts aluminum alloy to make automobile total mass alleviate in a large number, thus reduce the consumption of fuel oil; Because oil consumption is low, quality light, the exhaust emission of automobile is just few, contamination level just declines; The percent recovery of junked-auto is high, and aluminium matter automotive parts is substantially all recyclable; Required for reclaiming, the energy is few, and aluminium can repeatedly cyclic regeneration.According to pertinent data, vehicle weight often alleviates 10%, can realize fuel-economizing 8% at most.Often use 1kg aluminium, can make automobile in whole of life, reduce 20kg exhaust emissions.Meanwhile, aluminium is green material, easily reclaims, recovery capable of circulation.The energy adopting aluminium to save is 6-12 times that produces the primary aluminum power consumption used of this part.China is in aluminum alloy vehicular application aspect or stage at the early-stage, and full aluminium loading transport vehicle does not also form high volume product.Developed country's widely used aluminum alloy bodywork superimposed trailers already such as China Logistics equipment superimposed trailer is in seriously delayed state now, American-European.The appearance of this little gooseneck type Combination Welding longeron will expand the generally use of all aluminium alloy superimposed trailer further.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (10)
1. superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron, comprise front upper beam (1), middle neck beam (2) and rear underbeam (3), it is characterized in that: described front upper beam (1) is two web H-girder, comprise front upper flange (1-1), front two web (1-2) and front lower wing plate (1-3), described middle neck beam (2) comprises at least two blocks of class right-angled triangle webs be arranged in parallel, described rear underbeam (3) is H-girder, comprise rear upper flange (3-1), trailing web (3-2) and rear lower wing plate (3-3), the square edge I (2-1) of described middle neck beam (2) and II (2-2) is welded and fixed with the front end face of front lower wing plate (1-3) and rear underbeam (3) respectively, described front upper beam (1) end is provided with the breach (1-0) matched with rear underbeam (3) front end, described front upper beam (1) and rear underbeam (3) are welded and fixed by engages indentation (1-0).
2. superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron according to claim 1, it is characterized in that: also comprise the two web T-shaped strength beams (4) being arranged on middle neck beam (2) bottom, this pair of web T-shaped strength beam (4) comprises two sections, front and back, leading portion only comprises substrate (4-1), back segment comprises substrate (4-1) and strengthens two web (4-2), this T-shaped strength beam (4) leading portion and middle neck beam (2) hypotenuse (2-3) are welded and fixed, and back segment and rear lower wing plate (1-3) are welded and fixed.
3. superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron according to claim 1, it is characterized in that: also comprise the brace panel (5) be arranged on substrate (4-1), this brace panel (5) rear end is welded on substrate (4-1) surface, and front end extends to forward front lower wing plate (1-3) bottom and is welded and fixed with it.
4. superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron according to claim 1, it is characterized in that: be provided with stage casing riser (6) between the front end face of described middle neck beam (2) square edge II (2-2) and rear underbeam (3), described square edge II (2-2) and rear underbeam (3) are welded and fixed with this stage casing riser (6) respectively.
5. superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron according to claim 1, it is characterized in that: described front upper beam (1) and two web T-shaped strength beam (4) end are respectively equipped with closure plate I (7) and II (8), the side of described closure plate I (7) and the seam of front pair of web (1-2), edge respectively with front upper flange (1-1) and rear upper flange (3-1) seam; Described closure plate II (8) side with strengthen two web (4-2) seam, edge respectively with substrate (4-1) and rear lower wing plate (3-3) seam.
6. superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron according to claim 1, it is characterized in that: described middle neck beam (2) is made up of the class right-angled triangle web that two pieces are parallel to each other, described class right-angled triangle web monolithic thickness is 8-12mm, such right-angled triangle web square edge I (2-1) length is 400-500mm, square edge II (2-2) length is 130-180mm, and described right-angled triangle web hypotenuse (2-3) is in round and smooth shape.
7. superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron according to claim 1, it is characterized in that: described front upper beam (1) length is 3150-3300mm, sectional dimension is 175-215mm, wherein front upper flange (1-1) thickness is 14-17mm, before monolithic, two web (1-2) thickness is 5-7mm, and front lower wing plate (1-3) thickness is 16-19mm.
8. superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron according to claim 1, it is characterized in that: described rear underbeam (3) length is 8000-12000mm, sectional dimension is 340-400mm, and wherein, upper flange (3-1) thickness is 14-17mm, trailing web (3-2) thickness is 8-10mm, rear lower wing plate (3-3) thickness is 16-19mm.
9. superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron according to claim 1, is characterized in that: described pair of web T-shaped strength beam (4) length is 4000-5000mm, and described brace panel (5) length is 2000-3000mm.
10. superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron according to claim 1, is characterized in that: described front upper beam (1), rear underbeam (3) and two web T-shaped strength beam (4) adopt extrusion process to obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410834985.8A CN104554445B (en) | 2014-12-26 | 2014-12-26 | Small gooseneck type combined welded aluminum alloy longitudinal beam for semitrailer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410834985.8A CN104554445B (en) | 2014-12-26 | 2014-12-26 | Small gooseneck type combined welded aluminum alloy longitudinal beam for semitrailer |
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| Publication Number | Publication Date |
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| CN104554445A true CN104554445A (en) | 2015-04-29 |
| CN104554445B CN104554445B (en) | 2017-02-22 |
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| CN201410834985.8A Expired - Fee Related CN104554445B (en) | 2014-12-26 | 2014-12-26 | Small gooseneck type combined welded aluminum alloy longitudinal beam for semitrailer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104843071A (en) * | 2015-05-05 | 2015-08-19 | 东风商用车有限公司 | Aluminous alloy frame and manufacturing method thereof |
| CN105252159A (en) * | 2015-11-20 | 2016-01-20 | 辽宁忠旺特种车辆制造有限公司 | Welding process for longitudinal beam gooseneck stiffening plate |
| CN107186080A (en) * | 2017-07-20 | 2017-09-22 | 辽宁陕汽金玺装备制造有限公司 | Car aluminum magnesium alloy longeron cold roll forming mould and its moulding process |
| CN109178103A (en) * | 2018-09-08 | 2019-01-11 | 石家庄金多利专用汽车有限公司 | A kind of aluminium alloy semi-trailer longitudinal beam assembly |
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| EP0322328A1 (en) * | 1987-12-23 | 1989-06-28 | Rémy Diebolt | Forward-elongating device for a flat bed container carrying semi-trailers |
| CN2714408Y (en) * | 2004-02-12 | 2005-08-03 | 熊辉 | Platform trailer frame |
| CN102190019A (en) * | 2010-03-16 | 2011-09-21 | 中集车辆(辽宁)有限公司 | Gooseneck type semitrailer longitudinal beam and semitrailer |
| CN203047363U (en) * | 2013-01-09 | 2013-07-10 | 中国重汽集团济南动力有限公司 | Heavy truck beam assembly |
| CN203094187U (en) * | 2013-03-14 | 2013-07-31 | 辽宁融富通铝业股份有限公司 | Semi-trailer longitudinal beam |
| US20130307248A1 (en) * | 2010-12-08 | 2013-11-21 | Cequent Performance Products, Inc. | Under bed hitch mounting system |
| CN204323481U (en) * | 2014-12-26 | 2015-05-13 | 辽宁忠旺特种车辆制造有限公司 | Superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron |
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2014
- 2014-12-26 CN CN201410834985.8A patent/CN104554445B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0322328A1 (en) * | 1987-12-23 | 1989-06-28 | Rémy Diebolt | Forward-elongating device for a flat bed container carrying semi-trailers |
| CN2714408Y (en) * | 2004-02-12 | 2005-08-03 | 熊辉 | Platform trailer frame |
| CN102190019A (en) * | 2010-03-16 | 2011-09-21 | 中集车辆(辽宁)有限公司 | Gooseneck type semitrailer longitudinal beam and semitrailer |
| US20130307248A1 (en) * | 2010-12-08 | 2013-11-21 | Cequent Performance Products, Inc. | Under bed hitch mounting system |
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| CN203094187U (en) * | 2013-03-14 | 2013-07-31 | 辽宁融富通铝业股份有限公司 | Semi-trailer longitudinal beam |
| CN204323481U (en) * | 2014-12-26 | 2015-05-13 | 辽宁忠旺特种车辆制造有限公司 | Superimposed trailer little gooseneck type Combination Welding aluminum alloy longeron |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104843071A (en) * | 2015-05-05 | 2015-08-19 | 东风商用车有限公司 | Aluminous alloy frame and manufacturing method thereof |
| CN105252159A (en) * | 2015-11-20 | 2016-01-20 | 辽宁忠旺特种车辆制造有限公司 | Welding process for longitudinal beam gooseneck stiffening plate |
| CN107186080A (en) * | 2017-07-20 | 2017-09-22 | 辽宁陕汽金玺装备制造有限公司 | Car aluminum magnesium alloy longeron cold roll forming mould and its moulding process |
| CN109178103A (en) * | 2018-09-08 | 2019-01-11 | 石家庄金多利专用汽车有限公司 | A kind of aluminium alloy semi-trailer longitudinal beam assembly |
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| Publication number | Publication date |
|---|---|
| CN104554445B (en) | 2017-02-22 |
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