515results about "Superstructures" patented technology

There is provided a panel including a steel plate that has a metal structure containing martensite, wherein the surface property aspect ratio Str of the steel plate in a flat part in a center-side portion of the panel is 0.50 to 1.00, and the surface roughness parameter Sa of the steel plate in an end part and the flat part in the center-side portion of the panel is 0.50 μm or below.

The present application relates to the technical field of alloy materials, and provides high-strength hydrogen-embrittlement-resistant press hardening steel and a preparation method therefor and a use thereof. The high-strength hydrogen-embrittlement-resistant press hardening steel comprises the following components in percentage by weight: 0.22-0.28% of C, 0.8-1.4% of Mn, 0.01-0.08% of Nb, 0.2-0.8% of Cr, 0.001-0.005% of B, 0.01-0.06% of Ti, 0-0.5% of V, 0-0.5% of Si, 0-1.0% of Mo, 0-2.0% of Ni, 0-1.0% of W, and the balance being Fe and inevitable impurities, wherein the ratio of the weight percentage of Cr to the weight percentage of Nb is greater than 8. The high-strength hydrogen-embrittlement-resistant press hardening steel can have excellent strength and hydrogen embrittlement resistance, so that the safety performance of vehicles can be greatly improved, and the purpose of light weight is achieved.

Provided is a high-strength steel plate that is excellent in all of strain dispersion ability, ductility, bendability, and delayed fracture resistance under atmospheric corrosion and in a painted state. The steel plate has a specified composition and microstructure, and has an average value [τq] of the stress at which plastic deformation begins, τq, measured by nanoindentation at a position 1 / 4 of the plate thickness of the steel plate, of 1.70 GPa to 3.30 GPa, a standard deviation σq of said τq of 0.42 GPa or less, and further, when the average value [τs] of the stress at which plastic deformation begins, τs, measured by nanoindentation at a position 10 μm from the surface of the steel plate is taken as 0.85 × [τs], the proportion of measurement points that are less than 30.0% is 1.

A structural component, comprising at least two organo-sheet pieces which at least sectionally lie one on top of the other and which each include a fiber layer, wherein at least in the fiber layers of the organo-sheet pieces at least one pair of mutually aligned holes is formed, at which the organo-sheet pieces are positively connected to each other. There is furthermore proposed a method for manufacturing a structural component.

A plant (01) for manufacturing electric or hybrid vehicles, the plant (01) comprising, on one site, at least one assembly space (10) for the vehicles, in which no operation of transforming steel is carried out, thereby largely eliminating toxic emissions, the production of chemical waste, noise pollution, vibrations, dust and water consumption, with the result that the plant can be installed in the vicinity of or in residential areas.

A front rail configured to be supported by a vehicle frame includes a tubular body formed by a roll-formed high-strength metal and configured to undergo axial loading during a frontal vehicle impact. The high-strength metal steel defines a cross-sectional shape along a length of the tubular body. The tubular body includes a central wall extending from a first side wall to a second side wall defining at least a first longitudinal hollow channel and a second longitudinal hollow channel. A first crush initiator is disposed in the first side wall of the tubular body at a first crush area and is formed in the high-strength metal before roll-forming the tubular body. A second crush initiator is disposed in the corners of the tubular body at a second crush area and is formed in the high-strength metal after roll-forming the tubular body.

Provided is a high-strength steel plate that is excellent in all of component strength, stretch flangeability, bendability, and delayed fracture resistance under atmospheric corrosion and in a painted state. The steel plate has a specified composition and microstructure, and has an average value [τq] of the stress at which plastic deformation begins, τq, measured by nanoindentation at a position 1 / 4 of the plate thickness of the steel plate, of 2.50 GPa to 4.10 GPa, a standard deviation σq of said τq of 0.30 GPa or less, and further, when the average value [τs] of the stress at which plastic deformation begins, τs, measured by nanoindentation at a position 10 μm from the surface of the steel plate is taken as 0.85 × [τs], the proportion of measurement points that are less than 25.0% is 25.0% or less.

The invention discloses an Al-Mg-Zn aluminum alloy plate with excellent strong plasticity and light weight characteristics as well as a preparation method and application of the Al-Mg-Zn aluminum alloy plate. The alloy comprises the following components in percentage by mass: 5.0%-5.5% of Mg, 1.5%-2.0% of Zn, 0.4%-0.5% of Mn, 0.1%-0.3% of Cu, 0.15%-0.25% of Sc, 0.1%-0.15% of Zr, 0.05%-0.15% of Ag, less than or equal to 0.1% of impurities and the balance of Al. The density is not more than 2.63 g / cm < 3 >, the tensile strength is not less than 470 MPa, and the ductility is not less than 23%. The preparation method comprises the steps of high-purity raw material smelting and casting, two-stage homogenization, hot rolling, intermediate annealing, cold rolling, solid solution treatment and single-stage aging. Wherein the total pressing amount of hot rolling is 80-85%, the total pressing amount of cold rolling is 20-35%, and the single-stage aging time is 120-140 DEG C * 16-24 h. The microstructure of the alloy is characterized in that the average size of dispersed AlSc particles is smaller than or equal to 100 nm, the area fraction of deformed grains is larger than or equal to 70%, the average size of nanometer beta-AlMg and T-Mg (Al, Zn) composite precipitated phases is smaller than or equal to 20 nm, the number density is larger than or equal to 1 * 10 < m >, the area fraction of micron-order second phases is smaller than or equal to 0.5%, and the alloy is only formed by impurity Fe. According to the method, the traditional two-stage aging process is simplified, low density, high strength and high plasticity are synchronously improved, and the method is suitable for large-scale industrial application.

A hardtop shell is provided for vehicles having a variety of vehicle body styles, including all sport utility vehicles (SUV), trucks and crossovers. The hardtop shell follows the top frame of the vehicle / OEM roll cage, allowing for much more open-air space, when removing modular portions of the hardtop. The hardtop shell follows the top frame of the vehicle. The hardtop shell also can be mainly fabricated out of metal. The hardtop shell comprises a main outer frame that mates to the body and frame of the vehicle, and may also comprise modular and removable additional components such as roof panels, a rear door and gull wings. The main frame mates to the body or frame of the vehicle with a plurality of bolts, nuts, rivnuts, gaskets, seals, compression latches and other similar hardware or methods.

A glass fiber-based structural composite offers an alternative or supplement to carbon fibers in areas such as battery storage. Through electroless deposition of conductive materials like copper and nickel, the glass fiber surface is made conducting and functions as a good current collector. By using anode and cathode materials like manganese (II, III) oxide and Zinc, cathode and anode mats on the copper- and nickel-coated glass fibers are created via hydrothermal and electro-deposition methods. In one example application, the anode and cathode mats are in an alternate square patterned arrangement using copper and nickel-coated glass fiber as a current collector. The device, with a capacity of >300 mAh / g at 0.1 A / g is assembled using an alternate system of epoxy and electrolyte. Uncoated pristine glass fiber ladened and patterned with electrolyte are used as a separator. Uncoated pristine glass fiber ladened with epoxy can be used as an insulator between two devices.

The invention provides a die-casting aluminum alloy preparation method based on aluminum-containing waste, a die-casting aluminum alloy and application of the die-casting aluminum alloy. The preparation method comprises the following steps: S1, heating and melting the aluminum-containing waste at 760-820 DEG C to obtain a first melt; s2, raw materials are added into the first melt according to the components of the die-casting aluminum alloy to be prepared, and a second melt is prepared; s3, the second melt is cooled, and a third melt with the temperature ranging from 690 DEG C to 720 DEG C is obtained; and S4, the third melt is subjected to die-casting treatment, and the die-casting aluminum alloy is obtained. The die-casting aluminum alloy with high Fe tolerance and high Zn tolerance is prepared by taking the aluminum-containing waste as a main raw material. By accurately controlling the alloy components of the die-casting aluminum alloy and combining the smelting condition of the aluminum-containing waste raw material and the subsequent die-casting process, the die-casting aluminum alloy with high mechanical property is prepared under the condition of avoiding a heat treatment process.

The invention discloses an aluminum alloy material for a vehicle body and a preparation method of the aluminum alloy material, and relates to the technical field of aluminum alloys, and the aluminum alloy material comprises the following elements in percentage by mass: 7.5 to 9.5 wt% of Si, 0.12 to 0.3 wt% of Mg, 0.25 to 0.75 wt% of Mn, 0.08 to 0.45 wt% of Fe, 0.05 to 0.2 wt% of Ti, 0.015 to 0.03 wt% of Sr, 0.01 to 0.03 wt% of Ce, 0.005 to 0.015 wt% of Sm, 0 to 0.6 wt% of Zn, 0 to 0.2 wt% of Cu, and the balance of Al and impurities. According to the aluminum alloy material and the preparation method thereof, the strength and the toughness of the prepared aluminum alloy material both reach related standards through the matching effect of all proportional elements, meanwhile, effective control over an iron-rich phase can be achieved, and the prepared aluminum alloy material still has excellent strength and toughness under the condition that a higher proportion of regenerated materials is added.

The invention relates to the technical field of plates, in particular to a light-weight impact-resistant carbon fiber composite large plate and a preparation method and application thereof, and the composite large plate comprises a surface carbon fiber rigid composite layer, an internal toughness impact-resistant layer and a light-weight core layer which are sequentially arranged from outside to inside; the surface carbon fiber rigid composite layer is made of epoxy resin carbon fiber cloth prepreg; the internal tough impact-resistant layer is made of epoxy resin ultra-high molecular weight polyethylene prepreg; the lightweight core layer is formed by taking a three-dimensional woven carbon fiber fabric as a framework and adding a filling material in gaps of the three-dimensional woven carbon fiber fabric after reinforcing ribs made of a plurality of carbon fiber hollow square tubes are distributed in the three-dimensional woven carbon fiber fabric; the high-strength and high-modulus carbon fiber composite layer, the ultra-high molecular weight polyethylene composite layer and the light-weight core layer on the surface layer are integrally solidified, so that the technical problems that in the prior art, a foam sandwich plate is insufficient in rigidity and poor in mechanical property, impact resistance and layering resistance are solved.

A method of manufacturing a lightweight panel for a vehicle includes a mat fixing operation of manufacturing a first semi-finished product by fixing a mat to each of upper and lower surfaces of a paper honeycomb in a predetermined thickness and a resin spraying operation of manufacturing a second semi-finished product by applying a resin to each of upper and lower surfaces of the first semi-finished product. The method also includes a thermal molding operation of manufacturing a third semi-finished product by thermally molding the second semi-finished product between a heated upper thermal mold and a heated lower thermal mold, a sheet attaching operation of manufacturing a fourth semi-finished product by attaching a sheet molded on an upper surface of the third semi-finished product, and a trimming operation of cutting an unnecessary area of the fourth semi-finished product.

The invention provides low-cost low-alloy steel with the fracture toughness higher than 140 MPa.m < 1 / 2 > and the product of strength and elongation higher than 50 GPa% and a manufacturing method. The microstructure of the steel is as follows: 78-88% of martensite matrix, 10-20% of retained austenite, 1-3% of transition carbide and less than 1% of stable nano precipitated carbide. The steel comprises the following element components in percentage by mass: 0.60 to 0.70 percent of C, 1.25 to 1.75 percent of Mn, 1.25 to 1.75 percent of Si, 0.02 to 0.05 percent of Nb + V and the balance of iron. According to the manufacturing process, at least one time of normalizing treatment is carried out, and then a quenching-distribution-tempering (Q-P-T) heat treatment process is carried out. The mechanical property of the low-alloy steel is improved by designing a proper microstructure fraction, optimizing steel components and adjusting a heat treatment process, so that the fracture toughness of the low-alloy steel is higher than 140 MPa.m < 1 / 2 >, and the product of strength and elongation is higher than 50 GPa%.

The invention relates to an integrated aluminum alloy hollow auxiliary frame and a liquid die forging method thereof. According to the liquid die forging method of the integrated aluminum alloy hollow auxiliary frame, the composite liquid die forging technology combining vertical injection, horizontal pressurization, center pouring and a radiation type multi-ingate outlet is adopted, the inorganic sand core and the preheating core setting technology of the inorganic sand core are combined, and the problems that the sand core is prone to crushing and sand burning is serious are effectively solved; meanwhile, the feeding process is optimized through a multi-stage pressurization curve, so that the smoothness of the inner wall of a cavity of the product reaches 0.2 mm, eutectic silicon is refined to 5-10 microns, the secondary dendritic crystal spacing of alpha dendrites is smaller than 20 microns, the strength deviation of the obtained product is smaller than 15 MPa, the elongation deviation is smaller than 1.5%, X-ray flaw detection reaches the 1-2 level, the process yield is 60-80%, and the product quality is improved. The defects that when the integrated aluminum alloy hollow auxiliary frame is prepared through an existing liquid die forging process, a sand core is prone to being crushed, sand burning is serious, the performance deviation is large, and the process yield is low are successfully overcome.

The invention relates to a steel plate base body, a pre-plated steel plate and a preparation method thereof, a hot stamping forming component and a preparation method thereof and an automobile structural part. The steel plate substrate comprises 0.29 to 0.42 wt% of C, 0.15 to 0.50 wt% of Si, 0.30 to 0.90 wt% of Mn, 0.10 wt% or less of P, 0.10 wt% or less of S, 0.10 to 0.50 wt% of Al, 0.05 to 0.10 wt% of Nb, 0.001 to 0.02 wt% of B, 0.20 to 0.80 wt% of W, 0.10 wt% or less of impurities, and the balance of Fe. The hot-stamping formed steel plate disclosed by the invention can have high strength and high hydrogen embrittlement-resistant delayed cracking performance at the same time.

A vehicle chassis structure and a vehicle, the vehicle chassis structure includes: a battery pack housing, integrated with a vehicle body and located in a middle of the vehicle body, and a front sub-frame (191) and a rear sub-frame (192), respectively connected to a front end and a rear end of the battery pack housing; the battery pack housing is provided with a frame (1) arranged in a ring shape, and a front floor panel (15) connected to an inner side of the frame (1); the frame (1) and the front floor panel (15) define a battery module installation space (16); a front end and a rear end of the frame (1) are respectively connected to connection members (18); the front sub-frame (191) and the rear sub-frame (192) are both connected to the frame (1) through the connection members (18) at the corresponding end. The vehicle chassis structure of the present application is conducive to simplifying the assembly structure below the middle of the vehicle body by constructing the vehicle chassis in the form of an integrated battery pack housing; the arranging of the connection members is convenient for connecting and installing the front sub-frame and the rear sub-frame on the battery pack housing, which is conducive to the connection and assembly of the vehicle main structure.

The invention belongs to the technical field of humanoid robots, and particularly relates to a heavy-load anti-explosion humanoid robot moving chassis which comprises a frame assembly. The loading assembly is fixed above the frame assembly and acquires surrounding environment information by arranging a sensor group on the frame assembly; the wheel train assembly comprises four wheels distributed at the four corners of the frame assembly and a driving assembly connected with each wheel, and each driving assembly comprises a walking motor, a steering motor, a steering output piece and a walking connecting piece; the steering motor and the walking motor cooperate to achieve linear walking, steering walking, transverse movement and in-situ rotation of the movable frame assembly. The invention has the advantages of high control precision, small turning radius, difficult wear of tires, low noise and the like, and is suitable for a working scene requiring high precision in a narrow space.

A subframe structure and a vehicle. The subframe structure includes a ring frame (1) including a front cross beam (11) and a rear cross beam (12) spaced apart in a front-rear direction, and a left longitudinal beam (13) and a right longitudinal beam (14) spaced apart in a left-right direction, the left longitudinal beam (13) is connected to left ends of the front cross beam (11) and the rear cross beam (12) respectively, and the right longitudinal beam (14) is connected to right ends of the front cross beam (11) and the rear cross beam (12) respectively; and an upper cross beam (2) and a lower cross beam (3) spaced apart in an up-down direction, the upper cross beam (2) and the lower cross beam (3) are fixedly connected to the left longitudinal beam (13) and the right longitudinal beam (14).

Provided are a body frame member capable of suppressing deformation due to springback, and a method for manufacturing the same. The body frame member 1 of the present invention is formed in a substantially U shape by a web 2 extending in a front-rear direction of a vehicle body, an upper flange 3 extending inward in a vehicle width direction from an upper end of the web 2 and a lower flange 4 extending inward in the vehicle width direction from a lower end of the web 2, and comprises a kick-up portion 5 bent in the vertical direction of the vehicle body, and a convex portion 21 protruding outward or inward in the vehicle width direction is integrally formed from the upper end to the lower end of the web 2 at a portion of the web 2 where the kick-up portion 5 is provided.

An integrated aluminum alloy rear auxiliary frame structure comprises cross beams and side beams which are made of aluminum alloy, front suspension lining installation sleeves are symmetrically arranged on the front cross beam, front vehicle body lining installation sleeves are arranged at the front ends of the left side beam and the right side beam, and rear vehicle body lining installation sleeves are arranged at the rear ends of the left side beam and the right side beam. A transverse stabilizer bar installation opening is formed in the inner side of the rear vehicle body sleeve installation pipe, motor driving shaft receding holes are formed in the middle sections of the left side beam and the right side beam, upper control arm installation supporting lugs are arranged at the upper ends of the motor driving shaft receding holes, and a swing arm front installation opening is formed in the front side of the motor driving shaft receding holes. A motor driving shaft receding hole is formed in the front side of the front beam, a front beam adjusting rod mounting opening is formed in the lower end of the swing arm front mounting opening, a rear suspension lining mounting sleeve is arranged on the rear side of the motor driving shaft receding hole, and a swing arm rear mounting opening is formed in the lower end of the rear suspension lining mounting sleeve. A plurality of sand leakage holes communicated with the inner cavities of the side beams are formed in the upper and lower end surfaces of the left side beam and the right side beam.

To provide a pretreatment method for painting an automobile body including a high-tensile steel plate that can obtain desired corrosion resistance after painting.SOLUTION: There is provided a pretreatment method for painting an automobile body that includes an alkali defatting process, a first washing process, a chemical conversion process, a second washing process, and a cationic electrodeposition coating process in this order, in which a chemical conversion agent used for the chemical conversion process includes zirconium (A), free fluorine ions (B), an allyl amine-diallyl amine copolymer (C), aluminum ions (D), and nitric ions (E) each by a predetermined concentration, and the allyl amine-diallyl amine copolymer (C) forms acid addition salt having an anionic counter ions, pKa of the acid being -3.7 to 4.8 and a diallyl amine content ratio being 80 mol% or more and 98 mol% or less.SELECTED DRAWING: None

The invention relates to a die-casting magnesium alloy, a preparation method thereof and an automobile structural part. The die-casting magnesium alloy comprises 4.2%-7.0% by weight of Al, 0.15%-0.5% by weight of Mn, 0.20%-2.50% by weight of RE, 0.01%-1.5% by weight of Y, 0.03%-0.80% by weight of Ca, 0.01% by weight or less of Fe + Ni + Cu, 0.20% by weight or less of Zn, 0.05% by weight or less of impurities and the balance Mg. Wherein RE + Y is greater than or equal to 0.5 wt%, and RE comprises one or two of La and Ce. The die-casting magnesium alloy disclosed by the invention has relatively low rare earth addition amount, and on the premise of ensuring good mechanical property and casting property of the alloy, a die-casting piece has excellent bending property under the condition of not performing heat treatment, and is better suitable for a vehicle body structural member under a collision compression working condition.

An automotive sub-frame structure is proposed that can improve the stiffness of a sub-frame and minimize an increase in vehicle body weight. The automotive sub-frame structure includes a pair of left and right side members that are formed by hollow members extending in a vehicle body front-rear direction of an automobile and each have a coupling part for a suspension arm, and two or more cross members that are formed by hollow members extending in a vehicle body left-right direction of the automobile and are connected to the pair of left and right side members in a direction intersecting the side members, wherein stiffening parts are installed inside the cross members, near connection parts between each of the cross members and each of the side members, and the stiffening parts each have a cross-section stiffening portion that entirely or partially fills a cross-section of the cross member, and a plate-surface stiffening portion that has a shape conforming to an inner surface of an upper plate or a lower plate of the cross member and to an inner surface of at least one of left and right wall plates of the cross member.

The invention relates to a high-strength and high-toughness aluminum alloy material as well as a preparation method and application thereof. The alloy is particularly suitable for production of new energy automobile parts such as an auxiliary frame and a battery tray. In order to solve the problems that an existing AlSi7Mg alloy is serious in deformation, low in yield strength qualification rate and the like during high-temperature heat treatment, a proper amount of Cu and Mg are introduced on the basis of the AlSi7 alloy, alloy components are optimized, and the content of harmful elements is strictly controlled. By reducing the solid solution temperature to about 490 DEG C and combining proper solid solution time and an artificial aging process, the alloy disclosed by the invention can obviously reduce the heat treatment deformation of a casting while ensuring the tensile strength and the yield strength. Test results show that after the alloy is adopted, the yield ratio of a casting is higher than 0.73, and the ductility and the tensile strength both meet the design requirements of automobile parts. In addition, according to the alloy, the energy consumption is reduced, the shaping workload after heat treatment is reduced, the production efficiency and economic benefits are remarkably improved, and the alloy has wide industrial application prospects.

A structurally insulated body panel (SIP), a body panel made of SIPs and metal tubing skeleton, a vehicle body made of multiple SIPs, and a related process of manufacture.

The invention discloses a magnesium-rare earth alloy with a grinding tooth-shaped interface structure and a preparation method and application thereof, and belongs to the technical field of magnesium alloy material processing. According to the magnesium-rare earth alloy with the meshed tooth-shaped interface structure, a W phase is directionally separated out around the boundary of an Al2 (Gd, Y) phase. The Mg-Gd-Y-Zn-Al alloy serves as a base, a high-modulus Al2 (Gd, Y) phase is introduced, directional precipitation of a W phase around the boundary of the Al2 (Gd, Y) phase is achieved through multiple times of ultrasonic vibration composite multi-axial vibration coupling and secondary solution treatment, the Al2 (Gd, Y) phase with a tooth-shaped microcosmic interface structure is constructed, compatible deformation with a magnesium matrix is achieved, the Al2 (Gd, Y) phase is refined through composite deformation machining, stress concentration is relieved, and the mechanical property of the alloy is improved. And meanwhile, the strength and plasticity of the alloy are improved through torsional deformation of the LPSO phase. Through the formation of the special microstructure, the high strength, the high modulus and the high ductility of the magnesium-rare earth alloy are synchronously improved.

The auxiliary frame comprises an annular composite frame body and a metal connecting piece which is arranged on the frame body and used for being connected with a vehicle in an assembling mode, and the manufacturing method of the auxiliary frame comprises the steps that firstly, a foam core material is machined into a supporting template in the shape of the auxiliary frame body, and a metal insert is arranged on the supporting template; a connecting hole is formed in the metal insert; secondly, a reinforcing frame defined by fiber materials is woven outside the supporting formwork and the metal insert in a three-dimensional weaving mode; and thirdly, resin is injected into the reinforcing frame to be cured to form a composite frame body of the auxiliary frame, and the metal connecting piece is connected to the metal insert before or after resin injection. The formed auxiliary frame is obvious in weight reduction, capable of meeting the requirement for light weight, high in bearing capacity and outstanding in damage tolerance capacity and integrity, and therefore the industrial requirements for high strength, fatigue resistance, integrity and light weight of the automobile auxiliary frame are met.