CN102211525A - Design method for extruded magnesium alloy instrument panel tube beam - Google Patents
Design method for extruded magnesium alloy instrument panel tube beam Download PDFInfo
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- CN102211525A CN102211525A CN2011100957508A CN201110095750A CN102211525A CN 102211525 A CN102211525 A CN 102211525A CN 2011100957508 A CN2011100957508 A CN 2011100957508A CN 201110095750 A CN201110095750 A CN 201110095750A CN 102211525 A CN102211525 A CN 102211525A
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Abstract
The invention discloses a design method for an extruded magnesium alloy instrument panel tube beam. According to a design requirement, a preliminary structure of the instrument panel tube beam is designed according to the functions of the instrument panel tube beam, the connection with a vehicle body and occupied space on the basis of bearing capacity, spatial size and connecting hard points, basic performance of the structure is analyzed through modal analysis and rigidity analysis, and the section is optimally designed under the condition that the basic performance is not reduced and by taking the minimal mass as a target and the section size as a variable, so that the designed instrument panel tube beam has the minimal mass on the premise of meeting related technical requirements and regulatory requirements. By the design method, the workload is reduced, the characteristics of extruded magnesium alloy are fully considered, the product development success rate is improved, the development period is shortened, and the design and development of similar extruded magnesium alloy products are facilitated.
Description
Technical field
The invention belongs to mechanical design field, relate to manned vehicle parts design method, especially under the prerequisite of guaranteeing manned vehicle parts relevant art index, design the lightest extrusion magnesium alloy instrument carrier panel pipe girder construction.
Background technology
Magnesium alloy has lightweight, higher stiffness-to-density ratio and characteristics such as strength-to-density ratio, environmental friendliness, and the application on automobile more and more widely.In addition, the damp coefficent of magnesium has good shock resistance far above aluminium and iron and steel, helps vibration and noise reducing, therefore obtains comparatively widespread use in auto parts and components such as steering handwheel skeleton, steering column support, valve chamber cover.China has profuse magnesium resource, promotes the be applied in China of magnesium alloy on automobile and has advantageous advantage.
At present both at home and abroad instrument carrier panel Guan Liang thinks steel stamping part or steel pipe fitting, the technological method for processing of steelwork is full-fledged relatively, and steel instrument carrier panel Guan Liang is connected to being connected of homogeneous material with adjacent elements, adopts the industrial analysis of traditional steelwork and method of attachment design just can meet the demands.Adopt extrusion magnesium alloy to make instrument carrier panel Guan Liang and have lightweight, superior mechanical mechanical property and shock resistance, help alleviating quality and damping noise reduction.The design of existing steel instrument carrier panel Guan Liang mainly comprises two big contents: at first do the structure preliminary design according to designing requirement, adopt Finite Element Method to make cae analysis then and make improvements design.Wherein each components connects the traditional welding manner of employing, also need not to consider the anticorrosion requirement of Denging.This method is suitable for the design of steelwork, does not consider the characteristics of magnesium alloy and extrusion magnesium alloy material self.Therefore,, reach lightweight, failure-free requirement simultaneously, need the new method of designing of research if the magnesium alloy instrument carrier panel pipe beam of designing satisfies corresponding laws and regulations requirement and technical requirements.
Summary of the invention
Problems such as, connectivity more repeatedly for fear of the structure design that the steel instrument carrier panel pipe beam method of designing that adopts is at present both at home and abroad brought the invention provides a kind of extrusion magnesium alloy instrument carrier panel pipe beam method of designing.
In order to reach above purpose, the technical solution used in the present invention is:
A kind of extrusion magnesium alloy instrument carrier panel pipe beam method of designing, according to designing requirement, comprising load-carrying capacity, bulk, consider the function of instrument carrier panel Guan Liang on the basis of connection hard spot, with being connected of vehicle body, take up room and design the preliminary structure of instrument carrier panel Guan Liang, modal analysis and stiffness analytical structure key property, and be not reduced to condition with these key propertys, with the quality minimum is target, with the sectional dimension is that variable carries out the section optimal design, make the instrument carrier panel Guan Liang that designs under the prerequisite that satisfies correlation technique requirement and laws and regulations requirement, have the quality minimum, manufacturing process is analyzed the manufacturing feasibility of each parts of extrusion magnesium alloy instrument carrier panel pipe beam, connect the connection mode of component part in the industrial analysis magnesium alloy instrument carrier panel pipe beam assembly and the method for attachment of instrument carrier panel pipe beam assembly and adjacent steel product, guarantee that the magnesium alloy instrument carrier panel pipe beam of designing satisfies the low order vibration performance, static stiffness performance, anufacturability, connect manufacturability.
Described each parts of instrument carrier panel pipe beam comprise:
Instrument carrier panel pipe beam crossbeam adopts the extruding once-forming, carries out in-plane bending technology then 4 times, is provided with the linear portion of being convenient to clamp between two sections adjacent flex positions, and shaping, side cut are carried out in the two ends of instrument carrier panel pipe beam crossbeam, and local shaping is carried out in the centre;
Instrument carrier panel pipe boom support adopts the drawing work once-forming, cuts edge then, gets out corresponding datum hole, assembly opening in the position identical with the instrument carrier panel pipe boom support of existing steel instrument carrier panel Guan Liang;
Steering column is whole disposable being crushed to, and similar grooved spare is provided with long weld seam at midway location, and the middle sheet material in the steering column of existing steel instrument carrier panel Guan Liang is removed, and adopts extrudate, and the two ends bore hole goes out corresponding assembly opening;
The radio receiver support has been avoided incision design, adopts the mode of cutting edge to process, and it adopts crooked once-forming, carries out self-clinching stud hole, two ends and deburring then simultaneously;
Driver side and copilot's side stand, adopt extrudate to form by an extrusion stretching, carry out in-plane bending then six times, be provided with the linear portion of being convenient to clamp between two sections adjacent flex positions, in the position identical with copilot's side stand with the driver side of existing steel instrument carrier panel Guan Liang corresponding wire harness hole and connecting bore are set, the side that online beam hole is relative with connecting bore has been reserved the operational space of spanner;
Central support adopts extrudate by the extruding once-forming, carries out flange, side cut then, goes out positioning hole corresponding and assembly opening at last again, guarantees that fitting surface and hole site are identical with the central support of existing steel instrument carrier panel Guan Liang;
The air bag support adopts the drawing work once-forming, cuts edge then, gets out corresponding assembly opening in the position identical with the air bag support of existing steel instrument carrier panel Guan Liang;
Air conditioner support, make by blanking and punching technology, its bottom with the air bag support extends to the upper surface of air conditioner support, remove air conditioner support and dashboard cross member welding section, air conditioner support is welding with the part of air bag support applying, thereby avoided the more weak class cantilever beam structure of rigidity, can strengthen mutually between two parts.
The console support adopts flanging forming, and two side stand cross sections are identical, and go out corresponding assembly opening, console support and chaufeur/copilot's side stand butt welding, and promptly console support cross-sectional plane is welded on chaufeur/copilot's side stand surface;
Fixed support adopts bending forming, and fitting surface and hole site are identical with existing steel instrument carrier panel.
Each parts of described instrument carrier panel Guan Liang all adopt magnesium alloy materials, adopt argon arc welding to connect between each parts, and the steel bolt that instrument carrier panel Guan Liang uses when being connected with vehicle body or instrument carrier panel attaching parts on every side carries out aluminising to be handled.
According to instrument carrier panel pipe beam assembly geometric model, extract the middle face of parts, set up finite element model, instrument carrier panel pipe beam adopts the shell unit modeling, solder joint unit CWELD simulation is adopted in spot welding, and the seam weldering adopts node to overlap simulation, and the rigid element simulation is adopted in the position that part can't realize.
Link to each other with vehicle body three translational degree of freedom of position and three rotational freedoms of described instrument carrier panel pipe beam assembly are made as zero and retrain, with the relative motion relation of mimic board Guan Liang and vehicle body.
Before each parts sectional dimension of instrument carrier panel pipe beam is optimized, calculate the sensitivity of the whole natural frequency of dashboard cross member frame assembly single order earlier to its each parts sectional dimension, obtain those to the bigger parts of the whole natural frequency influence of dashboard cross member frame assembly single order, thereby choosing of design variable became more effective when sectional dimension was optimized, be unlikely to blindly to choose a large amount of design variables, influence computational efficiency and precision, according to the sensivity analysis result, having chosen the suitable components sectional dimension, to carry out mode dimensionally-optimised, finally the main components thickness of slab made amendment.
Described instrument carrier panel pipe beam external diameter is 50mm, and thickness is 2.5mm.
The bending spring of described instrument carrier panel pipe beam crossbeam is 100mm, and the length of straigh line between two sections adjacent flex positions is all more than or equal to 50mm.
Described instrument carrier panel pipe boom support thickness of slab is 2mm.
Described steering column thickness of slab is 2mm, and transitional region is by round-corner transition, to reduce stress concentration.
Described air bag support thickness of slab is 2mm.
Described console support thickness of slab is 1.5mm.
Described fixed support thickness of slab is 2.5mm.The extrusion magnesium alloy instrument carrier panel pipe beam method of designing that the present invention relates to is a kind of a kind of new method of designing of taking all factors into consideration structure design, manufacturing process, connection technology and material self-characteristic, contain structure design, finite element analysis technology, manufacturing process analysis and be connected industrial analysis, material analysis, effective combination of these analysis method can reach the inaccessiable effect of existing additive method, as fast, accurately reaching comfort feature.
The invention has the beneficial effects as follows: can make the extrusion magnesium alloy instrument carrier panel pipe girder construction of designing reach Optimum Matching in structural arrangement, bar cross section type and size, guarantee to guarantee under existing working condition, just can manufacture in low order vibration characteristic and necessary stiffness performance and consideration corrosion-proof connectivity.This method has not only been simplified work capacity, and has improved the product development success ratio, shortens time-to-market, has made full use of the lightweight of extrusion magnesium alloy self and the advantage of superior mechanical mechanical property.
Description of drawings
Fig. 1 is the schematic flow sheet of the inventive method.
Fig. 2 is the extrusion magnesium alloy instrument carrier panel tubular skeleton constructional drawing of designing.
Table 1 is mode sensivity analysis result.
Table 2 is the dimensionally-optimised results of mode.
The specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawing illustrated embodiment.
Fig. 1 is the schematic flow sheet of the inventive method, mainly comprise: according to designing requirement, comprising load-carrying capacity, bulk, consider the function of instrument carrier panel Guan Liang on the basis of conditions such as connection hard spot, with being connected of vehicle body, take up room and design the preliminary structure of instrument carrier panel Guan Liang, modal analysis and stiffness analytical structure key property, and be not reduced to condition with these key propertys, with the quality minimum is target, with the sectional dimension is that variable carries out the section optimal design, make the instrument carrier panel Guan Liang that designs under the prerequisite that satisfies correlation technique requirement and laws and regulations requirement, have the quality minimum, manufacturing process is analyzed the manufacturing feasibility of each parts of extrusion magnesium alloy instrument carrier panel pipe beam, connect the connection mode of component part in the industrial analysis magnesium alloy instrument carrier panel pipe beam assembly and the method for attachment of instrument carrier panel pipe beam assembly and adjacent steel product, guarantee that the magnesium alloy instrument carrier panel pipe beam of designing satisfies the low order vibration performance, static stiffness performance, anufacturability, connect manufacturability.
Fig. 2 is the magnesium alloy instrument carrier panel pipe girder construction figure that the present invention designs.
1, dashboard cross member 1
Consider structural behaviour and magnesium alloy materials performance, wait under the bending resistant section rigidity that along with the increase of external diameter, internal diameter increases gradually, thickness diminishes gradually, and quality constantly reduces.Consider that from the loss of weight angle increasing external diameter is to improve bending resistant section rigidity approach preferably.Because the restriction of locus, the external diameter of Guan Liang can not unconfined increase.Take all factors into consideration above factor, instrument carrier panel pipe beam 1 of the present invention (CCB) external diameter is 50mm, and thickness is 2.5mm.
The manufacturing process of instrument carrier panel pipe beam crossbeam is to adopt the extruding once-forming, carry out 4 in-plane bendings (promptly four axis of bendings are all in same plane) then, consider and make feasibility and comfort feature, dashboard cross member of the present invention adopts the magnesium alloy extruded tube material to obtain by bending process, all bending springs all are designed to 100mm, all designing between two sections adjacent flex positions has the linear portion of being convenient to clamp, and length of straigh line is all more than or equal to 50mm.Shaping need be carried out in two ends, cut edge, with the location that makes things convenient for CCB and with the welding of support, the fitting surface of design assurance of the present invention and support is constant; For avoiding interference and the support bracket fastened assembly precision with instrument carrier panel, the midway location of instrument carrier panel Guan Liang has carried out local shaping.Described shaping is one drawing operation, is to suppress on the basis of preceding one procedure again, and purpose is to guarantee the accuracy of this portion size and shape.
2, CCB two side stands 2 and support 3
Existing C CB backing thickness is 1.5mm, and rule of thumb, magnesium alloy thickness of slab and steel plate thickness are 12: 1 o'clock, and magnesium alloy plate has identical intensity with steel plate; Magnesium alloy plate and steel plate thickness are 1.7: 1 o'clock, and magnesium alloy plate has identical rigidity with steel plate.CCB of the present invention left and right sides support thickness of slab is 2mm.
The manufacturing process of CCB two side stands is to adopt the drawing work once-forming, to guarantee precision, cuts edge then, gets out corresponding datum hole, assembly opening in the position identical with existing support.The incision design in the existing design has been cancelled in design of the present invention, thereby guarantees the stiffness at CCB support and place, dashboard cross member position of weld.
3, the steering column support 4
Alternate design should guarantee rigidity, intensity key property index, and steering column thickness of slab of the present invention is designed to 2mm, and transitional region is by round-corner transition, to reduce stress concentration.Because this structure is whole disposable being crushed to, similar grooved spare, and long weld seam is arranged in the midway location design.Design assurance of the present invention and turning facilities fitting surface and hole site are constant, and the middle sheet material in the existing design is removed, and adopt extrudate, and the two ends bore hole goes out corresponding assembly opening.
4, the radio receiver support 5
Radio receiver support original structure is that the midway location place of pressed sheet has otch, but otch can reduce the stiffness of support, produces stress concentration at the incision site place, and poor to this manufacturability of magnesium alloy.Design-calculated radio receiver support of the present invention has been avoided incision design, has adopted the mode of cutting edge to process, and technology realizes feasible;
Design-calculated radio receiver support of the present invention at first adopts crooked once-forming, carries out self-clinching stud hole, two ends and deburring then simultaneously, guarantees with the fitting surface and the hole site of radio devices constant.
5, driver side support 6 and copilot's side stand 7
Existing driver side backing thickness is 2mm, be a monoblock through drawing, cut edge, the sheet metal component of three complex bends, punching, the Mold Making complexity, cost is higher.Generally speaking, the minimum bending radius of magnesium alloy punched plate is 3 times of thickness of slab.By analyzing as can be known, produce similar structure with magnesium alloy plate and come out, technology will be complicated more, and cost increases greatly.Consider that in addition the position of fitting surface and connecting bore can not revise, design therefore of the present invention intends adopting extrudate.
Design plan of the present invention forms by an extrusion stretching, carries out in-plane bending then six times, and all designing between two sections adjacent flex positions has the linear portion of being convenient to clamp.At Position Design corresponding wire harness hole and the connecting bore identical with existing support, for guaranteeing the comfort feature of operation, the side that online beam hole is relative with connecting bore has been reserved the operational space of spanner.
6, central support 8
Existing central support thickness is 1.5mm, be a monoblock through drawing, the sheet metal component of side cut, punching, the Mold Making complexity, cost is higher.The design of central support bottom has short flange, is used to support media device, guarantees the integral rigidity of central support simultaneously.Substitute the part principle of design according to magnesium alloy, the position of fitting surface and connecting bore remains unchanged.Consider the restriction of design space and magnesium alloy minimum bending radius, design of the present invention intends adopting extrudate.Design-calculated central support structure of the present invention as shown in Figure 2, thickness of slab is 2mm.
Design plan of the present invention adopts the extruding once-forming, carries out flange then, cuts edge, and goes out positioning hole corresponding and assembly opening at last again; The present invention designs and guarantees that fitting surface and hole site are constant.
7, the PAB support 9
Existing air bag support (PAB support) thickness is 1.5mm, is made up of two symmetrical parts that are stamped to form, and the discontinuous flange of support periphery design is so that support is located and cooperated with the air bag assembly.Substitute the part principle of design according to magnesium alloy, the position of fitting surface and connecting bore remains unchanged.Consider the restriction of design space and magnesium alloy minimum bending radius, design-calculated PAB supporting structure of the present invention as shown in Figure 2, thickness of slab is 2mm.
Design plan of the present invention adopts the drawing work once-forming, to guarantee precision, cuts edge then, gets out corresponding assembly opening in the position identical with existing support.
8, the HVAC support 10
Existing air conditioner support (HVAC) thickness is 1.2mm, is a monoblock through the sheet metal component that draws, cuts edge, local shaping and punching form, and the Mold Making cost is higher.In the transitional region of air conditioner support and with the design of place, dashboard cross member fit area local reinforced rib in three places and the long reinforced rib of twice are arranged, with this guarantee air conditioner support with the fitting surface vertical direction on rigidity.By analysis as can be known, be very difficult with the magnesium alloy punched design plan that has, though can revise the requirement of satisfying minimum bending radius for how much in transitional region, it is relatively more difficult for magnesium alloy to go out similar reinforced rib.
Design assurance fitting surface of the present invention and hole site are constant.Guaranteeing under air bag support and the air bag assembly mating surfaces unmodified situation, the bottom of air bag support is extended to the upper surface of air conditioner support, remove air conditioner support and dashboard cross member welding section, air conditioner support is welding with the part of air bag support applying, thereby avoided the more weak class cantilever beam structure of rigidity, can strengthen mutually between two parts.Fabrication procedure only needs blanking and punching to get final product, and has simplified manufacturing process greatly, has reduced die cost.
9, the console support 11
Existing console support (CNSL support) thickness is 1mm, is made up of two asymmetric of being stamped to form.Former support need be cut edge through drawing, and series of process such as punching are made, and die cost is higher.Bending spring is less in addition, only can't satisfy the minimum bending radius requirement by revising how much, and it is infeasible therefore simply to thicken scheme.
Design plan of the present invention considers that chaufeur/copilot's side stand is the rectangular tube structure, outside face is smooth, therefore existing support and chaufeur/copilot's side stand joint welding are revised as butt welding, promptly the support cross-sectional plane is welded on chaufeur/copilot's side stand surface.Design-calculated CNSL supporting structure of the present invention, thickness of slab is 1.5mm.Adopt flanging forming, two side stand cross sections are identical, go out corresponding assembly opening then; Design assurance fitting surface of the present invention and hole site are constant.
10, fixed support 12
The existing fixed backing thickness is 1.5mm, and through crooked, local shaping is made.Local reinforced rib mainly be for guarantee fixed support with the fitting surface vertical direction on rigidity.Because the fixed support size is less, make similar reinforced rib, be very difficult for magnesium alloy.Therefore design of the present invention only realizes by thickening that consider the restriction of minimum bending radius, design-calculated fixing rack structure of the present invention is shown in 3 (j), and thickness of slab is 2.5mm.
Design plan of the present invention adopts bending forming; Design assurance fitting surface of the present invention and hole site are constant.
11, instrument carrier panel pipe beam connects technology
Each parts that constitutes instrument carrier panel Guan Liang all adopt magnesium alloy materials, so adopt argon arc welding to connect between each parts, and welding is carried out in end that CCB contacts with the left and right sides support and side; The position welding that CCB contacts with steering column; PAB support and the welding of CCB position contacting; The position welding that the driver side support contacts with CCB; The position welding that copilot's side stand contacts with CCB; The position welding that fixed support contacts with CCB; Central support and driver side and the welding of copilot's side stand contact position; The position welding that the PAB support contacts with the HVAC support; CNSL support and driver side and the welding of copilot's side stand contact site.
Because direct contact can produce corrosion between magnesium alloy and the steel, therefore the steel bolt that uses when instrument carrier panel Guan Liang is connected with vehicle body or instrument carrier panel attaching parts on every side carries out the aluminising processing, so that play the corrosion-proof effect.
12, instrument carrier panel pipe beam finite element simulation
According to dashboard cross member frame assembly geometric model, extract the middle face of parts, set up finite element model.Instrument carrier panel pipe beam adopts the shell unit modeling, and solder joint unit CWELD simulation is adopted in spot welding, and the seam weldering adopts node to overlap simulation, and the rigid element simulation is adopted in the position that part can't realize.
The material that dashboard cross member frame assembly of the present invention adopts is JDM1 of magnesium alloy Shanghai Communications University magnesium alloy, and density is 1.85 * 10
-9T/mm
3, modulus of elasticity 45000MPa, Poisson's ratio 0.37.Link to each other with vehicle body three translational degree of freedom of position and three rotational freedoms of instrument carrier panel pipe beam assembly are made as zero and retrain, with the relative motion relation of mimic board Guan Liang and vehicle body.
Before the parts sectional dimension is optimized, calculated the sensitivity of the whole natural frequency of dashboard cross member frame assembly single order earlier to its each parts sectional dimension, obtain those to the bigger parts of the whole natural frequency influence of dashboard cross member frame assembly single order, thereby choosing of design variable became more effective when sectional dimension was optimized, be unlikely to blindly to choose a large amount of design variables, influence computational efficiency and precision.According to the sensivity analysis result, having chosen the suitable components sectional dimension, to carry out mode dimensionally-optimised, and finally the modification to the main components thickness of slab has proposed corresponding suggestion.
The sectional dimension parameter of all parts is got variable.Analyze the response sensitivity of different parts to dashboard cross member frame assembly structural modal, find out the sensitive compressible members that influences the whole natural frequency of single order, choosing with dimensionally-optimised interpretation of result of design variable proposes certain instruction during to the mode sensivity analysis.Specifically be to draw the parts the most responsive, be of a size of variable with these parts then and carry out sectional dimension optimization, may change to original sectional dimension in the section optimal process, thereby influence model frequency conversely the value of model frequency by sensivity analysis.
Table 1 is mode sensitivity calculations result.Can estimate dashboard cross member frame assembly parts mass change to the whole natural frequency amount of influence of its single order from dashboard cross member frame assembly lightweight angle like this.Increase figure medium sensitivity coefficient is that the thickness of slab of positive parts can improve the whole model frequency of dashboard cross member frame assembly single order, the desensitization coefficient can improve the whole model frequency of dashboard cross member frame assembly single order for the thickness of slab of negative parts, and these parts also can be used as the loss of weight object.
As can be seen from Table 1, central support, the driver side support, copilot's side stand, the CCB support, the sectional dimension of dashboard cross member is relatively large to the sensitivity coefficient of the whole natural frequency of dashboard cross member frame assembly single order, as dimensionally-optimised variable.
Design variable is a central support, driver side support, copilot's side stand, CCB support, the sectional dimension of dashboard cross member.Because in order to reduce the quantity of mould, the driver side support uses identical extrusion dies with copilot's side stand in the present invention's design, the sectional dimension with driver side support and copilot's side stand when therefore optimizing is classified as a variable.The thickness of CCB support is subjected to the restriction of bending spring in addition, so the upper limit is made as 2mm.Optimization aim is a dashboard cross member frame assembly quality minimum; State variable is the whole natural frequency (greater than 66.1Hz) of dashboard cross member frame assembly single order.Through 5 iteration, the quality of objective function dashboard cross member frame assembly reaches minimum value.Table 2 is the dimensionally-optimised results of mode.
Above-mentioned instrument carrier panel tubular skeleton final mass by the extrusion magnesium alloy manufacturing is 1.957kg, compares the loss of weight ratio with steel instrument carrier panel tubular skeleton and reaches 64.7%.
Extrusion magnesium alloy instrument carrier panel pipe beam method of designing provided by the present invention is a kind of a kind of new method of designing of taking all factors into consideration structure design, manufacturing process, connection technology and material self-characteristic, contain structure design, finite element analysis technology, manufacturing process analysis and be connected industrial analysis, material analysis, effective combination of these analysis method can reach the inaccessiable effect of existing additive method, as fast, accurately reaching comfort feature.This method is promoted at the design-calculated of gauge pipe beam similar parts and will greatly be improved designing quality and shorten the design cycle.
Table 1 mode sensitivity calculations result
| Design variable ID | The design variable | Sensitivity coefficient | |
| 1 | Central support | -1.04E+00 | |
| 2 | The console support | -1.19E-01 |
| 3 | The driver side support | 1.20E+00 |
| 4 | The air bag support | -6.54E-01 |
| 5 | Air conditioner support | -4.20E-01 |
| 6 | Fixed support | -7.80E-02 |
| 7 | The radio receiver support | -2.53E-01 |
| 8 | The steering column support | -4.68E-01 |
| 9 | The CCB support | 5.02E+00 |
| 10 | Copilot's side stand | 1.42E+00 |
| 11 | Dashboard cross member | 2.26E+00 |
The dimensionally-optimised result of table 2 mode
Claims (7)
1. extrusion magnesium alloy instrument carrier panel pipe beam method of designing, it is characterized in that: according to designing requirement, comprising load-carrying capacity, bulk, consider the function of instrument carrier panel Guan Liang on the basis of connection hard spot, with being connected of vehicle body, take up room and design the preliminary structure of instrument carrier panel Guan Liang, modal analysis and stiffness analytical structure key property, and be not reduced to condition with these key propertys, with the quality minimum is target, with the sectional dimension is that variable carries out the section optimal design, make the instrument carrier panel Guan Liang that designs under the prerequisite that satisfies correlation technique requirement and laws and regulations requirement, have the quality minimum, manufacturing process is analyzed the manufacturing feasibility of each parts of extrusion magnesium alloy instrument carrier panel pipe beam, connect the connection mode of component part in the industrial analysis magnesium alloy instrument carrier panel pipe beam assembly and the method for attachment of instrument carrier panel pipe beam assembly and adjacent steel product, guarantee that the magnesium alloy instrument carrier panel pipe beam of designing satisfies the low order vibration performance, static stiffness performance, anufacturability, connect manufacturability.
2. extrusion magnesium alloy instrument carrier panel pipe beam method of designing as claimed in claim 1 is characterized in that: described each parts of instrument carrier panel pipe beam comprise:
Instrument carrier panel pipe beam crossbeam adopts the extruding once-forming, carries out in-plane bending technology then 4 times, is provided with linear portion between two sections adjacent flex positions, and shaping, side cut are carried out in the two ends of instrument carrier panel pipe beam crossbeam, and local shaping is carried out in the centre;
Instrument carrier panel pipe boom support adopts the drawing work once-forming, cuts edge then, gets out corresponding datum hole, assembly opening in the position identical with the instrument carrier panel pipe boom support of existing steel instrument carrier panel Guan Liang;
Steering column for whole disposable being crushed to, is provided with long weld seam at midway location, and the middle sheet material in the steering column of existing steel instrument carrier panel Guan Liang is removed, and adopts extrudate, and the two ends bore hole goes out corresponding assembly opening;
The radio receiver support has been avoided incision design, adopts the mode of cutting edge to process, and it adopts crooked once-forming, carries out self-clinching stud hole, two ends and deburring then simultaneously;
Driver side and copilot's side stand, adopt extrudate to form by an extrusion stretching, carry out in-plane bending then six times, be provided with linear portion between two sections adjacent flex positions, in the position identical with copilot's side stand with the driver side of existing steel instrument carrier panel Guan Liang corresponding wire harness hole and connecting bore are set, the side that online beam hole is relative with connecting bore is reserved the operational space of spanner;
Central support adopts extrudate by the extruding once-forming, carries out flange, side cut then, goes out positioning hole corresponding and assembly opening at last again, guarantees that fitting surface and hole site are identical with the central support of existing steel instrument carrier panel Guan Liang;
The air bag support adopts the drawing work once-forming, cuts edge then, gets out corresponding assembly opening in the position identical with the air bag support of existing steel instrument carrier panel Guan Liang;
Air conditioner support is made by blanking and punching technology, and its bottom with the air bag support extends to the upper surface of air conditioner support, removes air conditioner support and dashboard cross member welding section, and air conditioner support is welding with the part of air bag support applying.
The console support adopts flanging forming, and two side stand cross sections are identical, and go out corresponding assembly opening, console support and chaufeur/copilot's side stand butt welding, and promptly console support cross-sectional plane is welded on chaufeur/copilot's side stand surface;
Fixed support adopts bending forming, and fitting surface and hole site are identical with existing steel instrument carrier panel.
3. extrusion magnesium alloy instrument carrier panel pipe beam method of designing as claimed in claim 1, it is characterized in that: each parts of described instrument carrier panel Guan Liang all adopt magnesium alloy materials, adopt argon arc welding to connect between each parts, the steel bolt that instrument carrier panel Guan Liang uses when being connected with vehicle body or instrument carrier panel attaching parts on every side carries out aluminising to be handled.
4. extrusion magnesium alloy instrument carrier panel pipe beam method of designing as claimed in claim 1, it is characterized in that: according to instrument carrier panel pipe beam assembly geometric model, extract the middle face of parts, set up finite element model, instrument carrier panel pipe beam adopts the shell unit modeling, solder joint unit CWELD simulation is adopted in spot welding, and the seam weldering adopts node to overlap simulation, and the rigid element simulation is adopted in the position that part can't realize.
5. extrusion magnesium alloy instrument carrier panel pipe beam method of designing as claimed in claim 1, it is characterized in that: link to each other with vehicle body three translational degree of freedom of position and three rotational freedoms of described instrument carrier panel pipe beam assembly are made as zero and retrain, with the relative motion relation of mimic board Guan Liang and vehicle body.
6. extrusion magnesium alloy instrument carrier panel pipe beam method of designing as claimed in claim 1, it is characterized in that: before each parts sectional dimension of instrument carrier panel pipe beam is optimized, calculate the sensitivity of the whole natural frequency of dashboard cross member frame assembly single order earlier to its each parts sectional dimension, obtain those to the bigger parts of the whole natural frequency influence of dashboard cross member frame assembly single order, thereby choosing of design variable became more effective when sectional dimension was optimized, be unlikely to blindly to choose a large amount of design variables, influence computational efficiency and precision, according to the sensivity analysis result, having chosen the suitable components sectional dimension, to carry out mode dimensionally-optimised, finally the main components thickness of slab made amendment.
7. extrusion magnesium alloy instrument carrier panel pipe beam method of designing as claimed in claim 2 is characterized in that:
Described instrument carrier panel pipe beam external diameter is 50mm, and thickness is 2.5mm;
The bending spring of described instrument carrier panel pipe beam crossbeam is 100mm, and the length of straigh line between two sections adjacent flex positions is all more than or equal to 50mm;
Described instrument carrier panel pipe boom support thickness of slab is 2mm;
Described steering column thickness of slab is 2mm, and transitional region is passed through round-corner transition;
Described air bag support thickness of slab is 2mm;
Described console support thickness of slab is 1.5mm;
Described fixed support thickness of slab is 2.5mm.
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| CN103455659A (en) * | 2012-06-04 | 2013-12-18 | 达索系统西姆利亚公司 | Numerical modeling of lineweld connections |
| CN103587608A (en) * | 2013-10-31 | 2014-02-19 | 芜湖普威技研有限公司 | Error proofing device for welding of instrument panel beam assembly |
| CN103738186A (en) * | 2014-01-21 | 2014-04-23 | 安徽江淮汽车股份有限公司 | Automotive console area body structure |
| CN103940563A (en) * | 2014-04-04 | 2014-07-23 | 同济大学 | Automobile instrument board framework modal test method and device |
| CN104149624A (en) * | 2014-08-04 | 2014-11-19 | 辉泰（太仓）汽配有限公司 | Framework assembly of automobile instrument panel |
| CN104750918A (en) * | 2015-03-13 | 2015-07-01 | 奇昊汽车系统（苏州）有限公司 | Implementation method and system of prosthesis steering column one-dimensional unit model for instrument board support optimization and simulation |
| CN104759762A (en) * | 2015-03-31 | 2015-07-08 | 苏州汇能激光科技有限公司 | Extruding aluminum cross beam for laser cutting machine and production process |
| CN106256670A (en) * | 2015-06-16 | 2016-12-28 | 华晨汽车集团控股有限公司 | A kind of optimization method of fascia board girder |
| CN110728084A (en) * | 2019-09-16 | 2020-01-24 | 中国第一汽车股份有限公司 | Forward design method for hollow thin-wall aluminum casting |
| CN111814365A (en) * | 2020-05-26 | 2020-10-23 | 博雷顿科技有限公司 | Strength checking method for electric heavy truck uniform-section charging seat support |
| CN112464382A (en) * | 2020-11-30 | 2021-03-09 | 奇瑞汽车股份有限公司 | Automobile instrument board beam size optimization design method |
| CN114475806A (en) * | 2022-01-07 | 2022-05-13 | 山东华盛荣镁业科技有限公司 | Combined magnesium alloy automobile beam and automobile with beam |
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| CN103455659B (en) * | 2012-06-04 | 2018-10-12 | 达索系统西姆利亚公司 | The numerical modeling of seam weld connection |
| CN103455659A (en) * | 2012-06-04 | 2013-12-18 | 达索系统西姆利亚公司 | Numerical modeling of lineweld connections |
| CN103587608A (en) * | 2013-10-31 | 2014-02-19 | 芜湖普威技研有限公司 | Error proofing device for welding of instrument panel beam assembly |
| CN103587608B (en) * | 2013-10-31 | 2015-07-22 | 芜湖普威技研有限公司 | Error proofing device for welding of instrument panel beam assembly |
| CN103738186A (en) * | 2014-01-21 | 2014-04-23 | 安徽江淮汽车股份有限公司 | Automotive console area body structure |
| CN103940563A (en) * | 2014-04-04 | 2014-07-23 | 同济大学 | Automobile instrument board framework modal test method and device |
| CN104149624A (en) * | 2014-08-04 | 2014-11-19 | 辉泰（太仓）汽配有限公司 | Framework assembly of automobile instrument panel |
| CN104149624B (en) * | 2014-08-04 | 2017-05-17 | 辉泰（太仓）汽配有限公司 | Framework assembly of automobile instrument panel |
| CN104750918A (en) * | 2015-03-13 | 2015-07-01 | 奇昊汽车系统（苏州）有限公司 | Implementation method and system of prosthesis steering column one-dimensional unit model for instrument board support optimization and simulation |
| CN104750918B (en) * | 2015-03-13 | 2018-01-19 | 奇昊汽车系统（苏州）有限公司 | Realization method and system for the one-dimensional model of element of prosthese steering column of instrument panel bracket optimization Simulation |
| CN104759762A (en) * | 2015-03-31 | 2015-07-08 | 苏州汇能激光科技有限公司 | Extruding aluminum cross beam for laser cutting machine and production process |
| CN106256670A (en) * | 2015-06-16 | 2016-12-28 | 华晨汽车集团控股有限公司 | A kind of optimization method of fascia board girder |
| CN110728084A (en) * | 2019-09-16 | 2020-01-24 | 中国第一汽车股份有限公司 | Forward design method for hollow thin-wall aluminum casting |
| CN110728084B (en) * | 2019-09-16 | 2023-03-10 | 中国第一汽车股份有限公司 | Forward design method for hollow thin-wall aluminum casting |
| CN111814365A (en) * | 2020-05-26 | 2020-10-23 | 博雷顿科技有限公司 | Strength checking method for electric heavy truck uniform-section charging seat support |
| CN112464382A (en) * | 2020-11-30 | 2021-03-09 | 奇瑞汽车股份有限公司 | Automobile instrument board beam size optimization design method |
| CN114475806A (en) * | 2022-01-07 | 2022-05-13 | 山东华盛荣镁业科技有限公司 | Combined magnesium alloy automobile beam and automobile with beam |
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Application publication date: 20111012 |