78 results about "Auto industry" patented technology

The invention relates to the technical field of coatings, and discloses a carbon nanotube modified acrylic resin coating and a preparation method thereof. The coating disclosed by the invention is prepared from the following raw materials in parts by weight: 100 parts by weight of a carbon nanotube modified water-based acrylic resin emulsion, 0.5 to 0.8 part by weight of a dispersing agent, 8 to 10 parts by weight of deionized water, 0.1 to 0.3 part by weight of a de-foaming agent, 5 to 7 parts by weight of a coalescing agent, 0.1 to 0.3 part by weight of a rheological agent and 0.8 to 1 part by weight of a flatting agent. A physical-chemical cross-linked network structure is formed in the coating by utilizing a long-chain structure and a dialkenyl structure contained in the functionalized carbon nano tube, and the physical-chemical cross-linked network structure and the uniformly dispersed carbon nano tube synergistically improve the mechanical property of the material, and imidazole quaternary ammonium salt and thymol structures contained in the functionalized carbon nano tube synergistically improve the antibacterial property of the material. The paint prepared by the invention has a relatively wide application value in the fields of furniture, woodware, automobile industry and the like.

The invention discloses a bypass inductor echelon current limiting topology and method for solid-state power distribution equipment, relates to the technical field of power electronic distribution, and is suitable for solid-state power controllers in the fields of aerospace, new energy automobiles and industrial automation. In order to solve the problems that when a large capacitive load is started, a current peak is likely to be generated to damage a device, and an existing current limiting scheme is low in efficiency or large in size, the topology comprises an input circuit, a main power circuit, an auxiliary circuit, a current limiting circuit, an absorption circuit and a load side circuit. According to the method, the auxiliary circuit switch tube is turned on in an echelon mode, and the main switch tube is turned on to complete starting after load voltage approaches power supply voltage and reaches a non-voltage-difference condition. According to the planar inductor integrated PCB, the size is reduced, the problem of long-term heating of a resistor is solved, the TVS overvoltage protection and RC anti-interference design are matched, the current peak is effectively restrained, the system efficiency and reliability are improved, and the high-power-density and differential-pressure-free starting requirements are met.

The invention relates to the technical field of impellers, in particular to an integral impeller forming method and an integral impeller, and the integral impeller is manufactured through the steps of manufacturing a water-soluble core, manufacturing an impeller wax mold, removing the water-soluble core in the wax mold, manufacturing slurry of a mold shell, manufacturing the mold shell, dewaxing and cleaning, roasting and forming parts. The water-soluble core is used for supporting the inside of the wax mold, a complex internal structure is formed through an accurate molding process, the size accuracy and the surface quality of the impeller are ensured, then an integral shell is obtained through three-layer coating, alloy is poured into the shell at high temperature to be solidified to form an impeller part, the integrity of the impeller and the consistency of materials are ensured, and the service life of the impeller is prolonged. According to the method, the risk of size inaccuracy caused by secondary splicing of the impeller is effectively avoided, the precision and the quality of a casting part are greatly improved, particularly in the precision casting field such as the aerospace industry or the automobile industry, remarkable technical advantages are achieved, and the performance reliability and the service life of impeller parts are ensured.

The application relates to a dual-phase high-entropy ceramic material for high-temperature thermal barrier coatings and a preparation method thereof, in particular to a dual-phase high-entropy ceramic (La 0.2 Nd 0.2 Gd 0.2 Y 0.2 Ho 0.2 )2Zr2O7 with low thermal conductivity and high thermal expansion coefficient, which is mainly used for thermal isolation, thermal barrier coatings and other applications in high-temperature environments. The application is prepared by adopting a solid-phase reaction sintering process through accurate design of the combination of rare earth elements, forms a stable dual-phase structure, effectively inhibits grain growth through grain boundary pinning, and thus maintains a nanoscale grain structure. Meanwhile, the material can efficiently block heat transfer at high temperatures through optimization of phase proportion, and the thermal expansion characteristics are matched with a metal base layer, effectively avoiding the falling risk caused by the difference in thermal expansion of the two, and thus greatly improving the service life and reliability of the material in a high-temperature environment. The high-entropy ceramic material of the application can be widely applied to fields with high demand for high-temperature thermal isolation in aerospace, aviation, automobile industry and the like, is especially suitable for thermal barrier coatings, high-temperature thermal insulation materials and other high-temperature thermal insulation applications, and has important engineering application value.

The present application relates to a kind of flame-retardant polyamide compositions and its preparation method and application.The flame-retardant polyamide compositions, including the following weight parts of component:PA6T / 66 resin 28~70 parts, PA6I / 6T resin 5~25 parts, flame retardant 10~21 parts.The flame-retardant polyamide compositions of the present application has good stability of mechanical properties (tensile strength) in long-period heat retention injection molding, and can be applied to long-time molding cycle large product in the field of automobile industry.

This invention provides a self-inspection control method, device, and server for vehicle production and maintenance, relating to the technical field of the automotive industry. The method includes: when the power supply to an ordered vehicle is detected to be on, connecting an information domain controller to the vehicle's manufacturing execution system (MES) based on a key sent by a vehicle networking service platform; sending vehicle information provided by the MES to the information domain controller, enabling the information domain controller to perform a self-inspection process to prevent errors in the vehicle's electronic control system; after the self-inspection of the vehicle's electronic control system passes, switching the information domain controller to production mode and using an electronic inspection program and a set of external cameras to perform a production self-inspection process on the vehicle's electronic control components and external equipment, so that the ordered vehicle can be delivered after the vehicle's production self-inspection passes. This invention can significantly improve the accuracy and efficiency of fault detection during vehicle production and maintenance.

The utility model provides a backrest grid wire rod rubber sleeving device which comprises a fixing table, a mechanical arm, a three-axis moving mechanism, a moving block, a conveying mechanism, a limiting block and a cutting mechanism. The movable block arranged at the output end of the three-axis moving mechanism, the conveying mechanism used for conveying the rubber sleeve and the cutting mechanism used for cutting the rubber sleeve are arranged, the rubber sleeve penetrates into a backrest grid under the action of the three-axis moving mechanism, and the rubber sleeve arranged in the backrest grid in a sleeved mode is cut off under the action of the cutting mechanism. Then, a new rubber sleeve is conveyed again under the action of the conveying mechanism, then the three-axis moving mechanism is started, and the next rubber sleeve penetrates into the backrest grid, so that continuous rubber sleeving of the rubber sleeve is achieved; therefore, the situation that workers need to assemble the rubber sleeves at the tail ends of the backrest grids one by one is eliminated, the efficiency is improved, meanwhile, manpower is saved, and the requirement for high-speed development of the modern automobile industry is met.

1. The name of the design product: endoscope (BPM-30 series). 2. The use of the design product: endoscope for detecting and analyzing the position of human eye not easy to reach, which can be applied to medical, mechanical manufacturing, petrochemical industry, aerospace, electric power construction, railway and ship, automobile industry, engineering construction, boiler pressure vessel, military reconnaissance and other special equipment inspection fields. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

The application discloses a preparation method of a hot-dip galvanizing zinc-aluminum-magnesium plated steel plate for automobile outer plates. The method controls the uniformity of the substrate organization composition, the surface structure and the organization, strictly controls the thickness of the substrate surface oxide film and the crystallization orientation, and enhances the wettability, adhesion, reactivity and solubility between the plating solution and the steel base. The method overcomes the quality defects such as shrinkage, stripes and small particles caused by the local shrinkage of the plating solution due to the surface tension and wettability difference in the hot-dip process of the prior art. The method not only realizes the 'zero defect' of the zinc-aluminum-magnesium plated steel plate surface, but also has high surface quality, compactness and uniformity, good adhesion, excellent forming performance and coating performance, and can meet the requirements of automobile outer plates, has a wide application prospect in the automobile industry, and will produce very significant social and economic benefits.

This invention belongs to the field of polymer composite materials technology, specifically relating to a composite polymer material and its application in vehicle damping panels. The composite polymer material provided by this invention comprises SBS modified asphalt, fillers, petroleum resin, EVA, silica, silane coupling agent, SBS styrene-butadiene rubber, and plasticizers. The fillers include magnetic powder and KF. The composite polymer material provided by this invention significantly improves the consistency of the material's damping factor, thermal stability, and high and low temperature adhesion performance, ensuring strong and long-lasting magnetic force, thereby meeting the stringent requirements of the automotive industry for lightweight, high reliability, and excellent NVH performance.

The invention relates to the technical field of ethylene propylene diene monomer, and discloses an ethylene propylene diene monomer composite material for an automobile sealing strip and a preparation process of the ethylene propylene diene monomer composite material. The ethylene propylene diene monomer composite material comprises the following components in parts by weight: 55-75 parts of ethylene propylene diene monomer, 25-45 parts of ethylene-vinyl acetate copolymer, 2-8 parts of nano titanium dioxide, 0.4-1.5 parts of vinyl acetate polymer, 1-1.8 parts of vulcanizing agent and the like. A polyvinyl acetate molecular chain is grafted on the surface of the nano titanium dioxide, so that the nano titanium dioxide has good compatibility with the ethylene-vinyl acetate copolymer and the ethylene propylene diene monomer, can be uniformly dispersed in the composite material, and has a better reinforcing effect on the material; the prepared EPDM rubber composite material has excellent hardness, tensile strength, elongation at break and tear strength, and can be better applied to the automobile industry fields such as sealing strips.

This invention relates to a filtration medium, more particularly, to a filtration medium comprising at least one layer and a resin binder composition comprising a lignin modified phenolic resin such as may be used for filtering fluids in automotive, industrial and domestic applications. It also relates to a filter element comprising the filter medium, a paper, methods of preparing the filter medium and element, and use of the filter medium or element.

This invention relates to the field of titanium alloy materials, specifically to an additive manufacturing method for a high fatigue strength Ti4Mo6Zr2Fe5Cu0.25O alloy and its preparation method. The chemical composition of this titanium alloy, by weight percentage, is: Mo: 3.0–5.0; Zr: 4.0–8.0; Fe: 1.0–3.0; Cu: 3.0–7.0; O: 0.10–0.40; with the balance being Ti. The preparation method of this titanium alloy is as follows: the titanium alloy is prepared using coaxial powder-feed laser additive manufacturing technology, with a laser power between 1500 and 3100 W, a scanning rate between 700 and 1500 mm / min, and an interlayer spacing of 0.4–1.2 mm. The titanium alloy prepared by this invention possesses excellent comprehensive mechanical properties and can be widely used in many important fields such as aerospace, biomedicine, petrochemicals, automotive industry, and marine engineering.

Filters and filter media are provided that comprise at least one layer and a resin binder composition comprising a lignin modified phenolic resin such as may be used for filtering fluids in automotive, industrial and domestic applications. Also provided herein are filter elements and / or a paper that comprise the filter medium, methods of preparing the filter medium and element, and use of the filter medium or element.

The utility model provides a rotary curing oven for brake pads, and relates to the field of curing ovens. The rotating frame is arranged in the square furnace body and is used for placing the brake pad and realizing rotation; the heating assemblies are arranged on the two sides of the square furnace body and used for uniformly heating the furnace cavity; the transmission assembly is used for driving the rotating frame to rotate; and the feeding and discharging assembly is arranged on the square furnace body and used for achieving automatic feeding and discharging of the brake pads. Compared with the single structural design of a traditional curing oven, the layout mode that the square oven body is combined with the rotating frame is adopted, and the space in the oven is more fully utilized. More groups of brake pads can be accommodated in a limited occupied area for curing treatment at a time, the requirement of mass production of the brake pads under rapid development of the automobile industry is met, the brake pad curing device is particularly suitable for small and medium-sized enterprises with limited production sites, and precious production space resources are saved for the enterprises.

The present invention relates to a composition comprising a thermoplastic polyurethane which is the reaction product of at least one diisocyanate (II), at least one polyol composition (PC) and at least one chain extender (CE), wherein the polyol composition comprises a polyol (PA) having secondary terminal hydroxyl groups; and the composition further comprises a component (CC) selected from the group of bismuth carboxylates and zinc carboxylates, preferably from the group consisting of bismuth carboxylates. The present invention also relates to a process for the production of said composition and to the use of the composition according to the invention for the production of extruded, injection-molded and pressed articles and foams, shoe soles, cable sheaths, hoses, profiles, conveyor belts, fibers, nonwovens, films, moldings, plugs, housings, damping elements for the electrical industry, the automotive industry, mechanical engineering, 3-D printing, medicine and consumer goods, in particular for the production of injection-molded products, extruded products, films, profiles and shaped articles. The present invention also relates to a shaped article comprising the composition according to the invention.

The invention concerns a method for producing a 6xxx series aluminium sheet comprising the steps of homogenizing an ingot made from a 6XXX series aluminium alloy; cooling the homogenized ingot with a cooling rate in a range of from 150° C. / h to 2000° C. / h directly to the hot rolling starting temperature; hot rolling the ingot to a hot rolling final thickness and coiling at the hot rolling final thickness with such conditions that at least 90% recrystallization is obtained while controlling the temperatures of hot rolling, in particular the relationship between the hot rolling starting temperature and the hot rolling exit temperature and / or controlling the grain size after coiling; cold rolling to obtain a cold rolled sheet. The method of the invention is particularly helpful to make sheets for the automotive industry which combine high tensile yield strength and good formability properties suitable for cold stamping operations, as well as high surface quality.

The application relates to the field of epoxy vitreous materials, and discloses a preparation method of a self-repairing epoxy vitreous material and the prepared material, and the preparation method comprises the following steps: performing a first reaction on an epoxy resin copolymer, a modified curing agent and an organic acid catalyst, wherein the molar ratio of the epoxy resin copolymer and the modified curing agent is 2:0.5-5, and the molar ratio of the organic acid catalyst and the epoxy resin copolymer is 1-10:20; the self-repairing epoxy vitreous material provided by the application has high self-repairing efficiency and short self-repairing time; moreover, the preparation raw materials of the self-repairing epoxy vitreous material in the application have wide sources, and the formula is flexible and changeable; the raw material ratio can be adjusted according to actual needs to regulate the mechanical properties of the material; the material can be recycled and reused under certain conditions, environmental pollution is reduced, and the self-repairing epoxy vitreous material has great application potential in products such as structural parts required by space shuttles and automobile industries.

This invention discloses a high-strength eutectic high-entropy alloy material containing trace amounts of non-metallic elements and its preparation method, belonging to the field of high-entropy alloy technology. The general formula for the eutectic high-entropy alloy described in this invention is (Al... a Cr b Fe c Co d Ni e ) g M f Where M represents one or more nonmetallic elements, M = B, C, Si; a, b, c, d, e, f represent the atomic percentage of each corresponding element, and g represents (Al) a Cr b Fe c Co d Ni e The atomic percentages of the alloys prepared by this invention are such that the following conditions are met: 15≤a≤25, 5≤b≤15, 20≤c≤30, 5≤d≤15, 35≤e≤45, 0≤f≤1, 99≤g≤100, where a+b+c+d+e=100 and f+g=100. The eutectic high-entropy alloy prepared by this invention has an FCC+BCC dual-phase structure, and the cast eutectic high-entropy alloy of this invention has a mixed interface composed of K-S interface and non-K-S interface, which has good thermal stability, strength and fracture elongation matching, and a high safety factor. It can be used in key high-tech fields such as aerospace, marine diving and automotive industries, and has high engineering application potential.

The invention discloses a machining method for an integrated metal automobile wheel, and relates to the technical field of the automobile industry. The machining method comprises the steps that S1, blanking is conducted, and a round metal blank is obtained; s2, multi-pass profiling is carried out, and a bidirectional taper material, an accurate angle material and an inwards-concave spoke plane are sequentially formed through three-time profiling procedures; s3, a reference system is prepared, and a center positioning hole and an asymmetric process pin hole are synchronously machined in one-time punching; s4, rim preforming is conducted, and rim protrusions are machined by adopting a shoveling and rotating technology on the basis of reference positioning; s5, rim final forming is conducted, specifically, the protrusions are formed into rims through rolling; s6, performance regulation and control spinning is conducted, specifically, the center of the spoke is rolled and strengthened, and directional wall thickness reduction is conducted on the rim; and S7, all machining is completed on the same standard. By means of the method, real weldless integrated forming can be achieved, production is simplified, and accurate standard unification, active performance regulation and control and reasonable material distribution can be achieved in the whole technological process.

The invention discloses a high-conductivity and high-heat-conductivity polypropylene composite material and a preparation method thereof. The high-conductivity and high-thermal-conductivity polypropylene composite material is prepared from the following raw materials in percentage by weight: 40 to 80 percent of polypropylene resin (PP), 1 to 10 percent of carbon nanostructure material CNS, 5 to 40 percent of boron nitride, 5 to 40 percent of magnesium oxide, 0.1 to 30 percent of talcum powder, 0.5 to 10 percent of compatilizer, 0.1 to 5 percent of silane coupling agent, 0.1 to 15 percent of flexibilizer, 0.1 to 5 percent of antioxidant and 0 to 2 percent of other auxiliaries. The high-conductivity and high-thermal-conductivity polypropylene composite material disclosed by the invention has relatively high mechanical properties, excellent conductivity, relatively high thermal conductivity and excellent injection molding performance, and can be widely applied to the fields of automobile industry, electronic appliances and electronic packaging.

The invention discloses an ultra-strong temperature-resistant foamed silica gel sealing strip, and aims to solve the problems that a traditional sealing strip is narrow in temperature resistance and severe in high-temperature performance attenuation. The sealing strip is prepared from high-temperature vulcanized silicone rubber base rubber, high-temperature-resistant reinforcing filler, a foaming agent and the like through the steps of mixing, extrusion, synchronous vulcanization foaming and the like, has an independent foam structure with the percentage of closed area being larger than 70%, can stably work at the temperature of-60 DEG C to 300 DEG C, has the compression permanent deformation rate being smaller than 40% at the temperature of 200 DEG C * 72 h, and has the tensile strength retention rate being larger than 80% after being aged at the temperature of 250 DEG C for 168 h. Comparison tests prove that the temperature resistance and the structural stability of the sealing material are remarkably superior to those of conventional products, and the sealing material can be widely applied to high-temperature sealing scenes such as aerospace, new energy automobiles and industrial kilns.

The invention discloses an intrinsic flame-retardant nylon 6 resin and a preparation method and application thereof, the intrinsic flame-retardant nylon 6 resin is prepared by the following steps: respectively salifying a sulfur-containing diacid monomer, a phosphorus-containing diacid monomer and a nitrogen-containing diacid monomer with an aliphatic diamine monomer in pure water to obtain a nylon salt solution S1, a nylon salt solution S2 and a nylon salt solution S3; and adding the nylon salt liquids S1, S2 and S3, caprolactam, a catalyst and a stabilizer into a reaction kettle, replacing air in the reaction kettle with inert gas for 3-4 times after feeding, and carrying out melt polycondensation to obtain the intrinsic flame-retardant nylon 6 resin. The intrinsic flame-retardant nylon 6 disclosed by the invention is very outstanding in heat resistance, weather resistance, processability, flame retardance, mechanical strength and the like, and the preparation method disclosed by the invention has the advantages of simple process flow, capability of realizing industrial continuous production and the like; the related products are widely used in the fields of textile industry, automobile industry, electronic and electric appliances, national defense and military industry, aerospace and the like.

A bio-based transparent polyamide resin, its preparation method, and its applications are disclosed. The general structural formula of the bio-based transparent polyamide resin is: [Formula omitted for brevity]. Wherein, R1 is a nitrogen-substituted meta-aromatic diacid group, R2 is a cyclic bio-based diacid group, and a or b = 4, 5, 6, or 10. The invention also discloses a method for preparing the bio-based transparent polyamide resin. The bio-based transparent polyamide resin can be used in the automotive industry, electronics, industrial machinery, medical devices, optical lenses, or aerospace fields. The bio-based transparent polyamide resin of this invention exhibits excellent adhesion, heat resistance, chemical resistance, and weather resistance; high glass transition temperature; high light transmittance; low water absorption; and diversified product range. The method of this invention uses renewable raw materials, has a simple process, short production cycle, and low cost, making it suitable for continuous industrial production.

The invention discloses a high-conductivity and high-heat-conductivity PBT (polybutylene terephthalate) composite material and a preparation method thereof. The high-conductivity and high-heat-conductivity PBT composite material is prepared from the following raw materials in percentage by weight: 40 to 85 percent of polybutylene terephthalate (PBT) resin, 1 to 10 percent of carbon nanostructure material CNS, 5 to 40 percent of boron nitride, 5 to 40 percent of aluminum oxide, 0.1 to 5 percent of silane coupling agent, 0.1 to 10 percent of dispersing aid, 1 to 15 percent of toughening agent, 0.1 to 5 percent of antioxidant and 0 to 2 percent of other aids. The high-conductivity and high-thermal-conductivity PBT composite material disclosed by the invention has good mechanical properties, excellent electrical conductivity, relatively high thermal conductivity and good injection molding performance, and can be widely applied to the automobile industry and the electronic and electric appliance industry.

The invention belongs to the technical field of automobile industry, and discloses an angle-variable automobile axle mechanical property test device and test method. Through the radial load loading device, the wheel hub controllable position angle driving device and the displacement testing device, wheel hub bearing deformation characteristics under the action of radial loads at different wheel hub angles can be achieved, then rigidity characteristics of a wheel axle at different position angles are obtained, and the rigidity uniformity of the wheel hub is obtained through comparison; according to the wheel hub controllable position angle driving device, the wheel hub is driven to rotate by driving the rolling wheel, then the other rolling wheel is driven to rotate, an encoder is arranged on a shaft of the other rolling wheel, the position angle of the wheel hub is monitored through the transmission ratio of the two rolling wheels, and the position angle of the wheel hub can be accurately adjusted; according to the servo-driven X-shaped folding lifting supporting device, the height of the supporting platform is adjusted through the servo electric cylinder, and then the height of the dowel bar is adjusted to adapt to hubs of different sizes.

The utility model relates to the technical field of automobile injection molding structural parts, and discloses a degradable modified plastic automobile integrated injection molding structural part which comprises a fixing seat, a wire arranging seat is fixedly connected to the bottom of the fixing seat, a wire inlet hole is formed in the top of the wire arranging seat, and the output end of the bottom of the wire inlet hole extends to the top of the inner wall of the wire arranging seat. The outer side wall of the wire arrangement seat is provided with four wire outlet holes which are annularly distributed at equal intervals, and the outer wall of one end, close to the wire outlet holes, of the wire arrangement seat is provided with a threaded groove. Cables can be orderly arranged through the wire inlet hole and the wire outlet hole, winding abrasion is avoided, the wire arranging base is in threaded connection with the bottom cover, the sealing performance and the cable fixing effect are enhanced, the overall stability of the structure is improved, meanwhile, the cushion block in the fixing base buffers the cables, the fixing cover resists external impact, internal parts are effectively protected, and the cable arranging base is suitable for the field of the automobile industry.

This invention discloses a production method for preventing cracking of non-quenched and tempered steel billets used in high-strength connecting rods. Addressing the existing problems of high crack sensitivity and deep longitudinal cracks in continuously cast billets and rolled products, this invention first designs a suitable chemical composition for the billet, and then optimizes the entire process from continuous casting, rolling into the furnace, heating, to post-rolling cooling to achieve precise control over billet temperature, stress, and microstructure segregation. Continuous casting employs low-superheat casting with two-stage electromagnetic stirring; rolling into the furnace uses high-temperature slow cooling or high-temperature hot delivery; the heating process is designed differently based on the furnace entry temperature; and post-rolling uses ultra-high-temperature slow cooling in a pit, fundamentally reducing surface stress and core segregation in the billet and preventing cracking. This invention improves the product qualification rate by 10%~15%, stably and efficiently producing high-strength non-quenched and tempered steel bars for connecting rods that meet the needs of the automotive industry, eliminating the need for quenching and tempering heat treatment, and offering advantages such as lightweighting, energy saving, and reduced consumption, thus enhancing the product's market competitiveness.

The application discloses a high-toughness polyether ether ketone composite material and a preparation method and application thereof, belongs to the field of polyether ether ketone composite materials, and aims to solve the technical problem that the existing polyether ether ketone composite material cannot simultaneously have high strength and high toughness. The method comprises the following steps: mixing graphene oxide, silicone rubber and polyether ether ketone resin powder to obtain mixed powder; then, the mixed powder is pressed at room temperature, and then sintering is performed to obtain the high-toughness polyether ether ketone composite material. The polyether ether ketone is modified by the silicone rubber and the graphene oxide in cooperation, the selection and matching of the modified materials are fully used to give full play to the synergistic effect of the silicone rubber and the graphene oxide, the toughness is greatly improved without reducing the strength and thermal stability of the base material, the obtained polyether ether ketone composite material has high strength, high thermal stability and high toughness, and can be applied to fields, such as aerospace, automobile industry and biomedicine, which have high requirements on comprehensive performance.

The invention discloses a zinc-aluminum-magnesium composite steel plate for an automobile and a processing technology of the zinc-aluminum-magnesium composite steel plate. The composite steel plate is formed by sequentially compounding a first functional zinc-aluminum-magnesium steel plate, a damping layer and a second functional zinc-aluminum-magnesium steel plate. The machining process comprises the steps that the surface of the zinc-aluminum-magnesium steel plate is sequentially subjected to cleaning, roughening, chemical activation and functionalization treatment, and the functionalized zinc-aluminum-magnesium steel plate is obtained; and pressing and curing the two layers of functionalized zinc-aluminum-magnesium steel plates and the damping layer under a composite roller to form a composite structure. Wherein the chemical activation treatment adopts an activation solution containing ammonium bifluoride, citric acid and hexafluorozirconic acid, and the functionalization treatment adopts a functional solution containing a silane coupling agent and a corrosion inhibitor. According to the invention, a physical anchoring and chemical bonding synergistic enhancement interface is constructed through multi-level surface modification, interlayer defects are avoided, and the composite material has the characteristics of excellent corrosion resistance, self-repairability, damping vibration attenuation and light weight, and meets the requirements of high durability, high environmental protection and high molding in the automobile industry.