190results about How to "Lightweight effect is good" patented technology

The invention discloses a lightweight visualization method of building information model based on Web3D. By parsing the EXPRESS language description file which defines the IFC standard, the method ofextracting all kinds of information from the IFC file is established, and the information for 3D visualization is extracted at the same time. Through the transformation of geometric expression and thecalculation of rotational position matrix, the original 3D visualization information is transformed into the rendering data which can be rendered by a WebGL graphics engine. Then, combined with the building shape characteristics, the original multi-branch tree algorithm is improved to create a hybrid index based on building indoor and outdoor space partition and multi-branch tree forest. Finally,based on the hybrid spatial index, using the technology of view elimination, occlusion elimination, multi-threading and cache management, in the WebGL-based three-dimensional interactive graphics application, the rapid scheduling of three-dimensional model data between the browser and the server is realized. This method has the advantages of good lightweight performance, cross-platform and high computational efficiency.

The present invention discloses a SiC base composite material light reflector with sandwich structure. Said SiC base composite material light reflector has a sandwiched three-layer structure, including SiC base composite material blank body, gradient transition layer and SiC surface coating layer. Said invention also provides its preparation method and concrete steps.

The invention relates to a cold-rolled martensite steel plate with yield strength of 750 MPa grade and a manufacturing method thereof, and mainly aims to solve the technical problem that the existingcold-rolled martensite steel plate with yield strength of 750 MPa grade is high in manufacturing cost. The cold-rolled martensite steel plate provided by the invention consists of the following chemical components in percentage by weight: 0.12-0.22% of C, 0.30-0.90% of Si, 1.30-1.90% of Mn, 0.20-0.80% of Cr, 0.010-0.050% of Ti, 0.020-0.060% of Al, less than or equal to 0.015% of P, less than or equal to 0.008% of S, less than or equal to 0.006% of N, 0.0015-0.004% of Ca and the balance of iron and inevitable impurities. The steel plate has yield strength of 790-830 MPa, tensile strength greater than 980 MPa, and percentage elongation after fracture A80 greater than or equal to 6%. The cold-rolled martensite steel plate is mainly used for manufacturing a truck boundary beam, a square tube stand column and the like.

The invention relates to mulch film, in particular to modified polyglycolic acid biodegradable mulch film and a preparation method thereof. The modified polyglycolic acid biodegradable mulch film is made from, by mass, 15-45 parts of polyglycolic acid, 40-80 parts of poly(butylene succinate-co-butylene terephthalate), 5-15 parts of a compatibilizer, 0.5-1.5 parts of a slipping agent, 0.5-1 part ofa hydrolysis-resistant agent, 0.1-0.5 part of an antioxidant, 0.1-0.5 part of an anti-light aging agent, 0.5-1 part of an antibacterial agent, and 5-20 parts of lightweight modified composite, wherein the lightweight modified composite is made from 0.1-0.5 part of epichlorohydrin, 1-2 parts of beta-cyclodextrin, 1-2 parts of potassium aluminum silicate, and 5-10 parts of mesoporous silica. The modified polyglycolic acid biodegradable mulch film has excellent heat-preserving and moisture-holding properties and has significant weight-reducing effect. The preparation method herein is simple andfeasible and is easy to implement.

The invention provides a variable-thickness automobile front bumper and a manufacturing method thereof. The automobile front bumper comprises a front bumper body which is of a thin-wall structure. The front bumper body sequentially comprises a left body section, a left transition section, a right body section, a right transition section and a right body section. A left energy absorption box and a right energy absorption box are arranged on the inner side faces of the left body section and the right body section of the front bumper body respectively, so that the front bumper body is connected with an automobile front longitudinal beam. The left body section and the right body section are of a uniform-thickness structure. The left transition section and the right transition section are of a continuous variable-thickness structure and become thinner gradually from the two ends to the middle body section. The middle body section is of a uniform-thickness structure and is the thinnest portion of the whole front bumper body. According to the variable-thickness automobile front bumper, by means of the design of parts of different thicknesses, the requirement for collision safety of the automobile front bumper is met, and the design of light parts can be achieved at the same time.

The invention relates to manufacturing method of vehicle components, as well as vehicle components and a vehicle. The method comprises the following steps of: a, layering continuous-filament woven fabric to obtain a layering structure (1); b, laying a resin film (2) at the bottom of the layering structure (1), and then performing pre-cutting to obtain a fibrous preform (3); and c, placing the fibrous preform (3) in an injection mold with an injection molding space (8), after mold clamping, injecting an injection molding material (6) containing discontinuous fibers and thermoplastic resin into the injection mold, so that the injection molding space (8) is full of the injection molding material (6) through injection molding and the fibrous preform (3) is infiltrated with the injection molding material (6), and performing pressure maintaining and forming so as to obtain the vehicle components (7). The method belongs to revolutionary innovation of a conventional low-pressure injection molding process. The manufactured components can meet the requirements of mechanical properties and formability at the same time. The problems of difficult forming by the conventional laminating process and low mechanical performance of the conventional injection molding process are solved.

The invention provides a variable-thickness automobile doorsill beam and a manufacturing method thereof. The variable-thickness automobile doorsill beam comprises a doorsill beam outer plate, a doorsill beam inner plate and a connecting plate arranged between the doorsill beam outer plate and the doorsill beam inner plate. The doorsill beam outer plate sequentially comprises an outer plate front section, an outer plate front transition section, an outer plate middle section, an outer plate rear transition section and an outer plate rear section. The doorsill beam inner plate sequentially comprises an inner plate front section, an inner plate front transition section, an inner plate middle section, an inner plate rear transition section and an inner plate rear section. The inner plate front section, the outer plate front section, the inner plate middle section, the outer plate middle section, the inner plate rear section and the outer plate rear section are of equal-thickness structures. The inner plate front transition section, the inner plate rear transition section, the outer plate front transition section and the outer plate rear transition section of the doorsill beam are of variable-thickness structures. The thicknesses of the sections are gradually decreased from thicker zones on two sides to the thinner zone. The variable-thickness automobile doorsill beam can well meet the collision safety requirement of an automobile body, is simple in structure and is manufactured by adopting a continuous variable-thickness steel plate, excessive design on the aspects of material thickness and part number can be avoided, the manufacturing cost of the doorsill beam can be reduced, and the lightweight effect is good.

The invention provides an aluminum alloy side wall structure and an automobile, belonging to the automobile lightweight field. The structure comprises an outer frame upper side beam, an outer frame Acolumn, an outer frame C column, an outer frame lower middle side beam, an outer frame lower front side beam, an outer frame lower rear side beam, an upper cross member, a lower cross member, a middlecross member, a door inclined beam, a plurality of upright columns and an inner plug-in joint. The structure comprises an outer frame upper side beam, an outer frame A column, an outer frame C column, an outer frame lower middle side beam, an outer frame lower front side beam, an outer frame lower rear side beam, a lower middle side beam of the outer frame, a lower front side beam of the outer frame, and a lower rear side beam of the outer frame by mortise and tenon. The top cross member is connected with the A column of the outer frame, and the end intersection of the C column of the outer frame is connected with the tenon and mortise of the plug-in joint. One end of the lower cross member is connected with the door inclined beam by the tenon and mortise joint, and the other end of the lower cross member is connected with the tenon and mortise joint of the C column of the outer frame by the tenon and mortise joint. The front beam under the outer frame is connected with the A column of the outer frame, the A column of the outer frame is connected with the upper beam of the outer frame, the upper beam of the outer frame is connected with the C column of the outer frame, and the C column of the outer frame is connected with the lower rear beam of the outer frame by means of plug-in joints. The automobile include that above structure. The structure and the lightweight effect of the automobile are good.

The invention discloses a heat insulation component for heat control of a Mars Landing machine. The heat insulation component comprises a thin layer structure, structure support pieces, first aerogel blocks, second aerogel blocks, honeycombs and skins, wherein the second aerogel blocks are filled inside the honeycombs and clamped between the upper skin and the lower skin so as to form a honeycomb plate, the first aerogel blocks and the structure support pieces are arranged on the first surface of the honeycomb plate, the thin layer structure is covered on the outer surface of the first aerogel blocks, and both the first aerogel blocks and the second aerogel blocks are composite SiO2 aerogel materials. The invention further discloses a manufacturing method for the heat insulation component. By utilizing the heat insulation component based on SiO2 aerogel, the problem that the aerogel material is difficult to use due to poor mechanical property is solved, and the heat insulation component is excellent in heat insulation performance and capable of effectively meeting requirement on heat insulation under the environment on the surface of the Mars, has obvious effect of light weight, can reduce the weight of a Mars lander, and is resource saving.

The invention provides a variable-thickness automobile roof middle cross beam. A roof middle cross beam body is of a thin-wall structure and sequentially comprises a left body section, a left transition section, a middle body section, a right transition section and a right body section. The left body section and the right body section are connected with an automobile side body column B and have a uniform thickness. The left transition section and the right transition section are of a continuous variable-thickness structure and become smaller in thickness from the two ends to the middle body section. The middle body section is the thinnest portion of the roof middle cross beam. According to the variable-thickness automobile roof middle cross beam, by means of the design that parts of different thicknesses are arranged along an automobile body in the Y axis direction, the safety requirements for collision resistance and pressure resistance of the roof middle cross beam are met, and the design of light parts can be achieved at the same time.

The invention discloses an automobile steering support beam assembly which comprises a main steering support beam, left and right mounting assemblies for steering support, a central support assembly and left and right DVD brackets, and the like, wherein the left and right mounting assemblies for steering support are integrated at left and right ends of the main steering support beam; the central support assembly is integrated with the middle part of the main steering support beam; a PAB mounting bracket and a glove box bracket are integrated on the right section of the main steering support beam; the main steering support beam has a groove structure and is formed by successively and adjacently arranging outward opening first groove structure and inward opening second groove structure in sections; criss-cross reinforcing ribs are arranged in the first and second grooves. The automobile steering support beam assembly can realize the integration and light weight of the steering support beam assembly under the condition of ensuring the rigidity and strength of the steering support beam assembly.

The invention provides a large-diameter main reflecting mirror. The large-diameter main reflecting mirror comprises a mirror surface, a back plate, an external wall, three mounting hole walls and a plurality of reinforcing walls, wherein the external wall is arranged on the outer side of the back plate, the three mounting hole walls are evenly distributed on the back plate in a circle, and the plurality of reinforcing walls are arranged between the external wall and the mounting hole walls. The plurality of reinforcing walls comprise a centre hole wall arranged in the center of the back plate, three reinforcing wall units evenly distributed around the centre hole wall and three connection walls connecting the three reinforcing units. The diameter of the large-diameter main reflecting mirror is 500mm, the large-diameter main reflecting mirror is mounted through the manner of back supporting, and the three parts on the periphery of a hole in the back are symmetrical based on variant densimetry calculation.

The invention relates to an environment-friendly aluminum alloy automobile sub-frame. The environment-friendly aluminum alloy automobile sub-frame is of a bilaterally symmetrical structure, is made of aluminum alloy, and comprises a front cross beam, a front automobile body left installing part, a front automobile body right installing part, a rear automobile body left installing part, a rear automobile body right installing part, a left longitudinal beam and a right longitudinal beam, wherein the front automobile body left installing part and the front automobile body right installing part are welded and connected through the front cross beam; the rear automobile body left installing part and the rear automobile body right installing part are connected in a butt welding mode; the front automobile body left installing part and the rear automobile body left installing part are welded and connected through the left longitudinal beam; and the front automobile body right installing part and the rear automobile body right installing part are welded and connected through the right longitudinal beam. All use performance indexes such as the strength and the rigidity of the sub-frame can be effectively ensured. The environment-friendly aluminum alloy automobile sub-frame has the advantages that parts are few; the manufacturing process is simple; and the light-weight effect is obvious. On one hand, the workload is greatly reduced; on the other hand, the assembly precision problem due to welding deformation can be reduced; and in addition, the projection area of a single part is not large, so that the goal can be achieved by an ordinary extrusion casting machine.

The invention discloses a carbon-fiber composite fender structure, and a laying and forming method thereof. The fender structure is characterized in that the fender structure comprises a fender body,one end of the fender body is connected with a fender mounting seat, a fender auxiliary mounting plate is arranged at one side edge, opposite to the fender mounting seat, of the fender body, and a fender reinforcing area is arranged on the fender body. The fender structure meets various performance requirements, a lightweight requirement, actual use requirements and forming technology requirements, and a fender produced by using the fender structure has the advantages of light weight, high strength, good anticorrosive property and good vibration damping property. A carbon fiber product with high quality and high performances is obtained through adopting an autoclave forming technology; and compared with traditional metal fenders, the fender produced by adopting the method has the advantages of obvious lightweighting effect and good application prospect.

A heat-insulation cushion applicable to heat control of a space camera relates to the technical field of heat control of space cameras and solves the problem that a fine heat-insulation effect and weight reduction of an existing heat-insulation cushion for heat control of a space camera cannot be realized simultaneously. A plurality of heat-insulation cushion sheets of the heat-insulation cushion are circumferentially clamped among polyimide rings and are fixed by screws via a plurality of layers of fixing points, and the polyimide rings are connected with corresponding equipment by bolts via heat-insulation cushion fixing points. The weight of a heat control system of the space camera can be remarkably lightened, resources of the space camera can be saved, design requirements can be effectively met, and the heat-insulation cushion is convenient and reliable in use.

The invention discloses a pure electric vehicle frame lightweight method based on nonlinear programming. The method comprises the following steps of S1, establishing a finite element model of a frame;S2, determining an optimized objective function and an optimized design variable, and solving a mathematical expression of the objective function by means of the Hypermesh software; S3, determining an optimized constraint condition, and collecting the sample data of each constraint response; S4, processing the sample data, performing function fitting on each constraint response by using a second-order response surface model, and solving an approximate agent model of each constraint; and S5, constructing a nonlinear programming model by using the agent model of each constraint and the mathematical expression of the objective function, and solving the optimization model. According to the method, by adopting the nonlinear programming model, and using the Lingo software for solving and optimizing, the optimal solution can be obtained within the extremely short time, and the optimization efficiency is greatly improved. The optimization method has the characteristics of simple principle, high solution rate, high optimization precision and the like.

The invention discloses a multilayer step-by-step optimization BIM model lightweight processing method. The method comprises the following steps of separating attribute data and grid data in an imported BIM model file; generating a scene tree structure for each component in the grid data according to the attribute data to obtain a topological relation among the components; processing each component of the grid data to generate a plurality of components with different precisions; obtaining a view frustum instruction input by a user, and determining a to-be-displayed component and display precision in combination with a preset visual clipping rule and a topological relation; and pushing the to-be-displayed component corresponding to the display precision to a display interface of the user for display. The invention further discloses a multi-layer step-by-step optimization BIM model lightweight processing system. According to the method and the system disclosed by the invention, the reasonable range and display precision of the display component can be intelligently selected, so that the pressure of displaying a large-volume model by a front-end 3D engine is reduced. The loading fluency is improved, and the purpose of light weight is achieved.

Provided is a mobile terminal part formed from a polybutylene-telephtalate resin composition having excellent properties such as a mechanical strength and a shock resistance and causing little shrinkage or warp deformation. More specifically, the polybutylene-telephtalate resin composition is prepared by mixing [A] 100 % by weight of denaturated polyethylene-telephtalate resin and [B] 40 to 140 %by weight of glass fiber having a flat cross sectional shape.

The invention discloses a carbon fiber composite material skylight reinforcing plate production method. The production method comprises the following steps that carbon fiber composite material prepregis prepared; the prepreg is tailored to be in an overall paving shape; die pre-treatment is carried out; the tailored prepreg is paved to a die molding face layer by layer; the outer side is paved with a vacuum bag after paving of the prepreg is carried out, and vacuumization treatment is carried out; a whole is fed into a hot pressing tank for heating, pressurizing and curing after paving is carried out; and cooling demolding treatment is carried out. By means of the carbon fiber composite material skylight reinforcing plate production method, various performance requirements, the light weight requirement, the actual use requirement and the molding process requirement are met, a produced skylight reinforcing plate is good in structure performance, the light weight effect is obvious compared with a traditional metal skylight reinforcing plate, and the good application prospect is achieved.

The invention belongs to the technical field of pneumatic springs and particularly provides a novel sleeve-type pneumatic spring with an external restraint aluminum cover. The novel sleeve-type pneumatic spring comprises a rubber pneumatic bag, wherein a pressure ring protective cover is arranged at the top end of the outer surface of the rubber pneumatic bag; a pressure ring A is connected between the pressure ring protective cover and the rubber pneumatic bag; an inner support ring is arranged in the rubber pneumatic bag; the external restraint aluminum cover is arranged on the outer surfaceof the rubber pneumatic bag; the external restraint aluminum cover, the rubber pneumatic bag and the inner support ring are buckled and connected through pressure; a piston is connected to the bottomof the rubber pneumatic bag; and the piston and the rubber pneumatic bag are buckled, fastened and sealed through a pressure ring B. According to the novel sleeve-type pneumatic spring, the plastic pressure ring protective cover that is flanged is adopted in an upper cover hold-down device, so that not only is the rubber pneumatic bag prevented from upward flanging, but also the pressure rings are resistant to rust and dust; the novel sleeve-type pneumatic spring is environmentally friendly, light in weight and improved in product security; and the rubber pneumatic bag is prevented from expansion interference with a peripheral part after being protected by the external restaint aluminum cover, so that the fatigue life is long and the safety is high.

The invention discloses a blast deflector. The blast deflector comprises a thermal diffusion layer, a structure layer and a cooling layer, wherein the thermal diffusion layer comprises one or more thermal diffusion modules; each thermal diffusion module comprises a closed circuit pulsating heat pipe and solid-liquid phase transformation materials; the structure layer adopts a lattice sandwich structure, and comprises an upper panel, a lower panel, basic cells and solid-liquid phase transformation materials; the cooling layer comprises a seawater cooling plate and a seawater transporting pump;the seawater cooling plate comprises a water inlet, a water outlet, a water diversion tank, a water collecting tank and a honeycomb type fractal flow channel network; the closed circuit pulsating heatpipes are arranged on the thermal diffusion layer in a module manner; when the center of the surface of the blast deflector is impacted by fuel gas, the characteristics that when any part of the closed circuit pulsating heat pipe is heated, the heat transfer characteristics are hardly changed, the thermal responding speed is high and the heat transfer capacity is excellent are utilized, the solid-liquid phase transformation materials stuffed in the space of a non-closed circuit pulsating heat pipe on the thermal diffusion layer and a non-basic-cell space on the structure layer are used for absorbing and storing massive melting heat in a phase transformation manner, so that heat quantity on the thermal diffusion layer is rapidly diffused, and good soaking performance is realized.

The invention provides a delivery vehicle complete vehicle structure of a full-integrated, modularized and total light-weighted structure and a vehicle, and belongs to the technical field of vehicles.The delivery vehicle complete vehicle structure comprises an aluminum alloy underbed structure, a lateral enclosure structure, a stand partition face structure, a forecabin instrument desk structure,a ceiling structure and connecting rib pieces. The aluminum alloy underbed structure comprises cross beams. The lateral enclosure structure comprises outer frame upper edge beams and outer frame A columns. The lateral enclosure structure is in mortise and tenon joint connection with cross beams. The ceiling structure is in screw joint or mortise and tenon joint connection with the outer frame upper edge beams. The stand partition face structure is in mortise and tenon joint connection with the lateral enclosure structure, the underbed structure and the ceiling structure. The forecabin instrument desk structure is in mortise and tenon joint connection with outer frame A columns. The forecabin instrument desk structure is in threaded connection or welding connection with the underbed structure. The connecting rib pieces are in mortise welding connection with the aluminum alloy underbed structure, the lateral enclosure structure, the stand partition face structure, the forecabin instrument desk structure, and the ceiling structure. The vehicle comprises the structures. The structures are excellent in mechanical property, is low in weight, and the vehicle can be conveniently manufactured and assembled in a modularization mode.

The invention discloses a battery pack box body and a battery pack with the same. The battery pack box body is characterized by comprising a lower box body, an upper cover arranged at the upper end ofthe lower box body, installation parts arranged on the periphery of the lower box body and a battery containing cavity formed between the lower box body and the upper cover, the lower box body comprises a frame and a spliced bottom plate arranged in the frame, and the frame comprises a first main beam and a second main beam which are vertically arranged; a first connecting part matched with the spliced bottom plate is arranged on the inner side of the first main beam; and a second connecting part matched with the spliced bottom plate is arranged on the inner side of the second main beam. Thebattery pack box body has the advantages of being good in weldability, high in structural strength, easy to expand and the like, the energy density of the system is improved while the safety of the battery system is guaranteed, and the lightweight requirement of the system is met.

Provided is a heavy-load pneumatic tire, which makes both durability and desired circumferential rigidity compatible while saving weight. The heavy-load pneumatic tire includes a steel belt of at least one layer, which is formed such that a plurality of steel cords (1) twisted of a plurality of filaments (11) are arranged in parallel in a bundle state. The height of a cord bundle (2), that is, the shorter diameter (A mm) of the steel cords (1), and a bundle width (B mm) satisfy the following formula (1) of B / A = 2.0 (1). The value of S = B / (B+D), which is defined by the bundle width (B mm) of the cord bundle (2) and a cord-bundle distance (D mm), satisfies the following formula (2) of 0.60 <= S <= 0.80 (2).

The present invention provides a blade spring structure made of composite materials and equal in sectional area. The blade spring structure comprises a blade spring body made of the composite materials, and the blade spring body made of the composite materials is widened and thinned gradually from the middle to two ends along the length direction, so that the cross sectional area of the blade spring body is equal constantly. The middle of the blade spring body made of the composite materials is fixedly connected with a hoop structure, and lifting lugs are fixedly connected to the two ends of the blade spring body through bolts and screws by means of gluing. The blade spring structure made of the composite materials and equal in sectional area has the advantages that by taking advantages of long fibers of the composite materials, the blade spring structure conforms to lightweight design thinking of a blade spring equal-stress beam completely, the service life of a blade spring can be prolonged greatly, a weight reduction effect is remarkable, more than 70% of weight can be reduced, and the blade spring made of the composite materials is extremely high in corrosion resistance by the aid of own composite material characteristics.

The invention belongs to the field of automobile manufacturing, and particularly provides a cantilever beam supporting device and a preparation method thereof. The cantilever beam supporting device comprises a base and a rod piece connected with the base, wherein the base and the rod piece are made of fiber-reinforced resin-based composite materials. The cantilever beam supporting device has the characteristic of lightweight so that the weight of a vehicle can be reduced, and the energy-saving and emission-reducing effects can be achieved. Meanwhile, the cantilever beam supporting device can effectively reduce the resonance effect of the cantilever beam supporting device and a vehicle frame, breaking can be prevented, quality risks are avoided, and the preparation method is simple and feasible.

The invention discloses a thermal-insulation three-dimensional hollow composite board. The board is of a sandwich structure, and comprises a core layer and reinforcement layers disposed on both sidesin the thickness direction of the core layer. The core layer includes a foam layer and reinforcing ribs arranged in the foam layer and prepared from resin A. A reinforcing layer is prepared from a three-dimensional hollow composite material, and is compounded on the foam layer via resin B, and the reinforcing ribs penetrate the foam layer and are connected to the reinforcing layer. The composite board has both the excellent thermal insulation properties of a foam material and the mechanical properties of a three-dimensional hollow composite material, and thus the use scope of the thermal insulation board is expanded. The present invention also discloses the application of the composite board.

The invention discloses a Mg-Li-Sn alloy with flame retardance and a machining process thereof, and unshielded melting of the Mg-Li-Sn alloy under the atmospheric condition can be achieved. The alloyis composed of, by weight, 10.0-12.0% of Li, 2.0-9.0% of Sn, 4.0-6.0% of Sr, 0.2-0.8% of Mn, 0.1-0.2% of Dy, 0.2-0.3% of Ho, 0.8-1.2% of S, 0.2-0.4% of B, and the balance Mg. The solution of a novel material is provided specific to the current situation that a Mg-Li alloy needs shielded melting during melting under high temperature currently. The Mg-Li-Sn flame-retardant alloy with the excellent flame retardance is obtained by an alloying method, and unshielded melting of the Mg-Li alloy under the atmospheric condition is achieved. When the alloy is exposed in the atmosphere under high temperature, an oxide layer and a nitride film are formed on the surface of the alloy. The films are compact in structure and high in spreadability, and the films are solid and not prone to volatilizing under high temperature and can provide excellent protection so that a magnesium alloy melt can be prevented from being further oxidized. The obtained Mg-Li alloy material has the mechanical performance asa traditional Mg-Li alloy under the room temperature, and further has the high heat transfer coefficient which is not possessed by the traditional Mg-Li alloy, specifically, the heat transfer coefficient of the obtained Mg-Li alloy material is 110-120 W / m.K and the heat conductivity coefficient of the traditional material is about 80 W / m.K.

The invention relates to the field of frame-type structural aluminum alloy welding, and discloses a machining method of a frame-type structural aluminum alloy welded auxiliary vehicle frame. The machining method comprises the steps that aluminum alloy pipes, aluminum alloy plates and aluminum alloy profiles are welded to form a frame-type structure, and the frame-type structural aluminum alloy welded auxiliary vehicle frame is obtained. The machining method of the frame-type structural aluminum alloy welded auxiliary vehicle frame is used for solving the problems that in a traditional iron plate stamping welding process, products obtained after stamping welding of high strength steel plates are heavy, and the weight reducing effect is not obvious, the number of welding procedures is reduced, the production efficiency is improved, and the unladen mass of the aluminum alloy welded auxiliary vehicle frame is reduced.

The invention discloses an electric vehicle and a front cabin structure thereof. The front cabin structure comprises a front anti-collision beam, a front longitudinal beam assembly, an oblique supporting beam assembly, a water flowing groove, a front coaming, a damping tower, a first front beam and a second front beam. The front longitudinal beam assembly comprises an energy absorption box, a supporting plate and a front longitudinal beam body, and the front end of the energy absorption box is welded to the two ends of the front anti-collision beam. The oblique supporting beam assembly is welded to the tail of the front longitudinal beam assembly. The lower portion of the damping tower is welded to the front longitudinal beam body, and the upper portion of the damping tower is welded to awater flowing groove framework. The second front beam is arranged at the upper portion of the front longitudinal beam body, the two ends of the second front beam are welded to the damping tower, and the rear side face of the second front beam is welded to the front coaming. The front portion of a water flowing groove body is welded to a water flowing groove framework front supporting beam, and thetwo ends of the water flowing groove body are welded to the water flowing groove framework through a water flowing groove connecting plate. The structure implementing manner is simple, convenient andfast, the manufacturing technology is simple, and the collision safety performance of the structure is improved to a great degree while structure lightweight is achieved.