371 results about "Silumin" patented technology

The disclosure provides Si-free aluminum alloys comprising Ce, Zn, and Mg suitable for laser powder bed fusion (LPBF) 3D printing. The printed components can be subjected to hot isostatic pressing and further heat treated to provide 3D printed components exhibiting higher hardness than existing Al-Si based alloys produced under the same conditions. The Si-free aluminum alloy resists coarsening of second phase on HIP, retaining high strength and hardness. The alloy also does not need separate solutionizing and water quenching following HIP, thus saving cost, time and permitting design of more delicate and intricate geometries.

The invention relates to the technical field of aluminum alloys, in particular to a high-strength wear-resistant aluminum alloy material and a preparation process thereof. Aluminum alloy raw materials are subjected to smelting, casting, high-temperature heat preservation, extrusion forming and stretching forming, and the aluminum alloy plate is obtained. And the surface of the aluminum alloy plate is subjected to thermal diffusion treatment, and the high-strength aluminum alloy plate is obtained. And then modified chitosan, paraffin, a vanillin solution, a sodium tartrate solution and the like are added to prepare the microcapsule corrosion inhibitor. The preparation method comprises the following steps: mixing isophorone diisocyanate, hydroxypropyl polydimethylsiloxane, a microcapsule corrosion inhibitor and dibutyltin dilaurate to obtain an organic silicon modified polyurethane resin prepolymer, and adding various assistants to obtain the high-performance coating. And the surface of the high-strength aluminum alloy plate is coated with the high-performance coating, and a finished product is obtained after drying.

The invention relates to the field of aluminum alloy conductors, and provides a high-strength aluminum alloy conductor and a preparation method thereof. The high-strength aluminum alloy conductor is prepared from the following components in percentage by mass: 0.2 percent to 0.4 percent of Si, 0.5 percent to 0.7 percent of Mg, 0.3 percent to 0.5 percent of Ti, 0.3 percent to 0.5 percent of Zn, 0.1 percent to 0.15 percent of Zr, 0.05 percent to 0.1 percent of Sc, 0.05 percent to 0.15 percent of Yb, 0.01 percent to 0.03 percent of Sn, less than or equal to 0.15 percent of Fe, 0.003 percent to 0.005 percent of B and the balance of inevitable impurities and Al. According to the high-strength aluminum alloy conductor provided by the invention, by optimizing the raw material ratio and the preparation process, the conductivity, strength and corrosion resistance of the aluminum alloy conductor in a high-temperature, humid or corrosive environment are improved.

The invention discloses a high-strength aluminum alloy profile for an anti-collision beam and a preparation method of the high-strength aluminum alloy profile, and the aluminum alloy profile comprises the following components in percentage by mass: 0.42-0.62% of Si; 0.15% to 0.30% of Fe; 0.18% to 0.35% of Cu; mn: less than or equal to 0.15%; mg: 0.87%-1.07%; 0.06% to 0.24% of Cr; 0.10% or less of Zn; 0.02% to 0.14% of Ti; 0.05%-0.15% of La series rare earth; 0.02% to 0.05% of Ge; and the balance of Al and inevitable impurities. The components of the 6-series aluminum alloy are optimized, the content of Fe and Zn is reduced, a small amount of Ge is introduced, the Ge can replace part of Si, compared with Si, a composite phase higher in density and better in coherence with a matrix is formed, and the strength of the aluminum alloy is improved. In addition, Sc is further introduced, Sc and Ge have a good synergistic effect with other elements, and the strength and toughness of the aluminum alloy are remarkably improved.

The invention discloses a 6-series high-strength aluminum alloy plate for an automobile and a preparation method of the 6-series high-strength aluminum alloy plate, and belongs to the technical field of aluminum alloy preparation. The plate comprises the following metal element components in percentage by mass: 0.7%-1.0% of Si, 0.2%-0.3% of Fe, 0.5%-0.9% of Cu, 0.15%-0.3% of Mn, 0.6%-1.0% of Mg, 0.15%-0.25% of Cr, 0.05%-0.1% of Zn, more than or equal to 0.2% and less than or equal to 0.35% of Cr and Zn, and the balance of Al and inevitable impurities. The preparation method comprises the following steps: smelting and casting according to alloy components and proportions to obtain a cast ingot, homogenizing, carrying out hot rolling and coiling, cooling, carrying out cold rolling and coiling, carrying out solid solution treatment, carrying out pre-aging treatment, and detecting whether the mechanical property meets the requirements or not. By adding the Cr and Zn elements and controlling the adding amount of the Cr and Zn elements, the obtained aluminum alloy plate is high in strength, good in plasticity and low in anisotropy.

The invention discloses a rare earth modified high-strength aluminum alloy and a preparation method of an aluminum alloy fastener. The aluminum alloy comprises the following chemical components in percentage by mass: 0.4 to 1.6 percent of Mg, 0.4 to 1.0 percent of Si, 0.1 to 0.2 percent of Cu, 0.1 to 1.0 percent of Zn, 0.1 to 1.0 percent of Mn, 0.1 to 0.6 percent of Cr, 0.1 to 0.3 percent of V, 0.03 to 0.3 percent of Ag, 0.01 to 0.35 percent of Ti, 0.01 to 0.35 percent of Zr, 0.01 to 0.35 percent of Hf, less than or equal to 0.40 percent of Fe, 0.05 to 0.5 percent of La, 0.05 to 0.5 percent of Yb, 0.05 to 0.5 percent of Sm, less than or equal to 0.03 percent of other inevitable single impurity elements, less than or equal to 0.15 percent of total impurity elements and the balance of aluminum. Aiming at the problems of low room temperature strength, insufficient plasticity, poor thermal stability and the like of the existing 6 * * * series aluminum alloy bolt, the rare earth modified high-strength aluminum alloy is prepared by adding a proper amount of rare earth elements such as lanthanum, samarium and ytterbium and reasonably optimizing alloy elements through the processes of smelting, refining, casting and the like, and is used for manufacturing the bolt, so that the bolt has a good application prospect. And the bolt can have relatively high room-temperature strength, plasticity and thermal stability so as to meet the requirements of various fields.

The invention discloses a high-strength 6082 aluminum alloy, and relates to the technical field of alloys. When the high-strength 6082 aluminum alloy is prepared, firstly, aluminum chloride, titanium tetrachloride, chromium chloride, cerous nitrate and lanthanum nitrate serve as precursors, carbon fibers are doped, a reinforced phase A is prepared after heat treatment, secondly, aluminum powder, titanium powder, copper powder, chromium powder and manganese powder are prepared into high-entropy alloy to serve as a reinforced phase B, and finally, the high-strength 6082 aluminum alloy is prepared. And the reinforced phase A, the reinforced phase B and the aluminum alloy powder are mixed to prepare the aluminum alloy. The high-strength 6082 aluminum alloy prepared through the method has the good mechanical property.

The invention discloses a notebook computer shell processing method and relates to the technical field of notebook computer shells. The method comprises the following steps: S1, material selection: selecting a high-strength aluminum alloy plate; s2, material cutting is conducted, specifically, the high-strength aluminum alloy plate is cut into a primary blank according to the needed size and shape; s3, pressing a bending groove: pressing the bending groove at the joint between the bottom shell and the bending part; s4, primary bending: stopping applying pressure when a bending angle of 50-80 degrees is formed between the bottom shell and the bending part; s5, secondary bending: forming a 90-degree bending angle between the bottom shell and the bending part; s6, primary hemming: arranging a necking part at the top of the bending part, and stopping applying pressure when a hemming angle of 50-80 degrees is formed between the necking part and the bending part; s7, performing secondary hemming to form a 90-degree hemming angle between the necking part and the bending part; and S8, back extrusion is carried out, wherein a right-angle inner curled edge is formed between the inner side of the necking part and the bent part. The technical scheme has the advantages of strong supporting force, high structural strength, difficulty in deformation and easiness in surface treatment.

A method for producing a sheet or plate of aluminum alloy comprising the steps of: casting the alloy, the alloy having a composition including the following elements and percentage by weight: 6.80 – 10.00% Zn, 2.20 – 3.50% Mg, 1.30 – 4.00% Cu, 0.01 – 0.30% Sc, 0.05 – 0.20% Zr; cold rolling of the aluminum alloy sheet or plate at room temperature with a reduction per pass of between about 5% and 20%; applying a solution heat treatment to the sheet or plate by heating the sheet or plate to a temperature of between about 400°C and 500°C; quenching the sheet or plate; and performing an artificial ageing treatment by heating the sheet or plate to a temperature of between about 80°C and 200°C and maintaining the sheet or plate at this temperature for a time period of between about 30 minutes and 100 hours.

The invention discloses a power distribution network operation and maintenance inspection device and method based on artificial intelligence, and relates to the technical field of power distribution network operation and maintenance inspection. The power distribution network operation and maintenance inspection device comprises an inspection device bottom plate, the top of the inspection device bottom plate is provided with a high-strength aluminum alloy main body, and the top of the high-strength aluminum alloy main body is provided with a fixed seat; an electric telescopic rod is mounted at the top of the fixed seat, and a holder movement module is mounted at the output end of the electric telescopic rod; and the holder movement module is used for controlling the horizontal and vertical rotation of the visual monitoring module. The holder movement module is installed, the height of the visual monitoring module is adjusted through an electric telescopic rod, and movement is conducted through a connecting rod mechanism composed of a first movable seat, a first linear connecting rod, a second movable seat, an L-shaped connecting rod, a third movable seat, a second linear connecting rod and a fourth movable seat; the rotation of the mounting seat and the visual monitoring module in the horizontal and vertical directions is realized, so that the monitoring range and flexibility are improved, complex terrains and monitoring requirements are met, and the operation and maintenance efficiency and accuracy are improved.

The invention relates to the technical field of aluminum alloys, in particular to a 6-series high-strength aluminum alloy, a processing technology and application of the 6-series high-strength aluminum alloy in a solar photovoltaic structural member. The 6-series aluminum alloy material comprises the following components: 0.6-0.9 wt% of Si, 0.8-1.1 wt% of Mg, 0.4-0.7 wt% of Cu, less than or equal to 0.2 wt% of Mn, less than or equal to 0.1 wt% of Cr, less than or equal to 0.1 wt% of Zn, less than or equal to 0.1 wt% of Ti, less than or equal to 0.3 wt% of Fe and the balance of Al and inevitable impurities. By adopting the 6-series aluminum alloy designed by the invention, the performance requirement that the yield strength of an extruded profile of a solar photovoltaic structural member is greater than 320 MPa can be met, so that the new high-strength aluminum alloy material can be used for carrying out reduced section design of the solar photovoltaic structural member, and the effects of lighter weight and lighter weight are achieved; the use cost of the material is greatly reduced; and meanwhile, the situation that recrystallization of the extruded material is too thick, and too thick extrusion recrystallization causes bad influence on the appearance of the anode can be avoided.

The invention provides a high-strength aluminum alloy heat treatment process which comprises the following steps: firstly, performing two-stage homogenization treatment: firstly, heating an aluminum bar to 400-420 DEG C, preserving heat for 4-10 hours, then transferring to 420-480 DEG C, and preserving heat for 10-20 hours; then, the aluminum bar is subjected to solution treatment, specifically, the aluminum bar is subjected to heat preservation for 1-4 h at the temperature of 360-420 DEG C; then, in the extrusion process, an extrusion die is preheated, the temperature is kept at 360-380 DEG C, the extrusion speed is 2-5 m / min, and the temperature of an extrusion outlet is 380-420 DEG C; then, on-line solution treatment and on-line quenching are conducted, specifically, after extrusion forming is conducted, the formed material is heated to 450-480 DEG C on line, heat preservation is conducted for 0.5-4 h, and then on-line water spraying quenching is conducted immediately to the room temperature; then, multi-stage aging is conducted, specifically, in the first-stage aging, heat preservation is conducted for 12-18 h at the temperature of 110-130 DEG In the second-stage aging, the temperature of-80 DEG C to-180 DEG C is kept for 2 And in the third-stage aging, the temperature of 160-220 DEG C is kept for 6- By means of the high-strength aluminum alloy heat treatment process, the alloy structure homogenization of the forming material can be effectively improved, and the strength, hardness and elongation of the forming material are improved.

Disclosed are a high-strength aluminum alloy powder and preparation method thereof, as well as high-strength aluminum alloy parts and additive manufacturing method thereof. The high-strength aluminum alloy powder includes the following components by weight percentage: 4.0 wt. % to 7.0 wt. % of Zn, 1.5 wt. % to 3.5 wt. % of Mg, 1.0 wt. % to 3.5 wt. % of Cu, the content of Sc is a, and 0.4 wt. %≤a≤1.3 wt. %, at most 0.2 wt. % of Zr, at most 0.5 wt. % of Fe, at most 0.4 wt. % of Si, at most 0.5 wt. % of Mn, at most 0.2 wt. % of Ti, at most 0.28 wt. % of Cr, at most 0.05 wt. % of O and N, and the balance of Al.

The utility model provides a low-temperature brittle-fracture-resistant special alloy plate. The low-temperature brittle-fracture-resistant special alloy plate is characterized in that the alloy plate is arranged in a frame assembly, the alloy plate comprises a base layer, two reinforcing layers, two composite layers and two wear-resistant layers, the base layer is made of high-strength 7075 aluminum alloy and used for providing bearing capacity, the reinforcing layers are made of ferrite and used for preventing cracks from expanding, and the composite layers are made of high-strength aluminum alloy and used for providing high-strength aluminum alloy and used for providing high-strength aluminum alloy and high-strength aluminum alloy and used for providing high-strength aluminum alloy and high-strength aluminum alloy. The composite layer is made of a nickel-based alloy material and is used for absorbing external impact energy, and the wear-resistant layer is made of a tungsten steel material and is used for increasing wear resistance; the multiple reinforcing ribs are installed at the top and the bottom of the base layer correspondingly, and butt joint openings are formed in the adjacent faces of the two reinforcing layers correspondingly. According to the low-temperature brittle-failure-resistant special alloy plate provided by the utility model, crack propagation can be effectively hindered through the design, so that when the alloy plate bears external force at a low temperature, cracks need to continuously change directions to bypass grain boundaries and consume more energy, and thus the brittle-failure-resistant capability is remarkably improved.

The utility model provides a building daylighting roof which comprises an outer frame, a daylighting assembly and a heat insulation assembly, the outer frame is made of high-strength aluminum alloy materials and fixed to the top of a building body through expansion bolts, the daylighting assembly is installed on the outer frame, and the daylighting assembly is composed of multiple layers of composite boards. Comprising an outer tempered glass layer, a middle polycarbonate sunlight plate layer and an inner dimming glass layer, and the heat insulation and heat preservation assembly is installed on the outer frame and located below the lighting assembly. The indoor temperature can be reduced in summer, the indoor temperature can be kept warm in winter, the energy consumption of an air conditioning system is reduced, and the energy-saving target of a building is achieved.

The invention provides a hard and tough alternately laminated light-weight corrosion-resistant composite material, which comprises a laminated matrix formed by periodically and alternately stacking high-strength aluminum alloy layers and carbon fiber reinforced thermoplastic resin layers; the metallurgical-mechanical composite interface is located between the high-strength aluminum alloy layer and the carbon fiber reinforced thermoplastic resin layer, forms a nanoscale coarse structure on the surface of the aluminum alloy through plasma activation treatment, and is combined with the thermoplastic resin matrix to form a transition area with mechanical interlocking and chemical bonding functions; the conductive polymer anticorrosive coating covers the surface of the outermost layer of the laminated matrix; the preparation method of the light-weight anti-corrosion composite material comprises the following steps: surface pretreatment, plasma activation treatment, laying, hot-pressing curing and preparation of an anti-corrosion coating. Through the synergistic effect of macroscopic laminated configuration design, microcosmic interface strengthening and a surface active anti-corrosion coating, the advantage of light weight is kept, and meanwhile, balanced improvement of impact wear resistance and long-acting electrochemical corrosion resistance is achieved.

The utility model discloses a distribution cabinet for a cable demarcation room, which belongs to the technical field of distribution cabinets and comprises a shell frame, a protective cover plate, an adjustable support and a modular wiring board. The distribution cabinet for the cable demarcation room is novel in design and ingenious in device, a brand-new design scheme of the distribution cabinet for the cable demarcation room is provided, the defects of a traditional product are overcome, and the distribution cabinet for the cable demarcation room adopts an open type framework concept to be matched with a flexible and changeable combined accessory form; not only is the space use efficiency greatly improved, but also new challenges possibly occurring in the future can be effectively handled, specifically, a stable and reliable bearing platform and a high-strength aluminum alloy shell frame are constructed, and a set of convenient and efficient cable management system, an adjustable bracket and a modular wiring board combination are introduced. And the space occupancy rate of the distribution cabinet in the cable demarcation chamber is greatly improved, so that the distribution cabinet better meets the requirement of the miniaturization trend of current electric power facilities.

The utility model discloses a smoke baffle door of a light-weight elastic sealing structure, and relates to the technical field of smoke baffle doors, the smoke baffle door comprises a door frame and a door plate arranged on the inner side of the door frame, and further comprises a sealing assembly, an elastic pressing assembly, a linkage assembly and a chimney assembly, the door frame is made of a high-strength aluminum alloy material, and the door plate is made of a carbon fiber composite material. According to the utility model, through the wavy elastic sealing gasket and the belleville spring capable of automatically compensating and pressing, the sealing performance is effectively improved, and the smoke leakage is greatly reduced; the aluminum alloy door frame and the carbon fiber composite material door plate are adopted, the weight of the baffle door is obviously reduced, installation and maintenance are convenient, meanwhile, the load of a supporting structure is relieved, and the construction cost is reduced; the device is made of a high-temperature-resistant and corrosion-resistant sealing material and a belleville spring with good buffering performance, so that the device can adapt to a severe smoke environment, and the fatigue damage of a sealing piece is reduced.

A motor applied to a five-in-one electric pump assembly of an active suspension of a vehicle chassis belongs to the technical field of vehicle chassis, and comprises a motor shell, a stator, a rotor and a motor shaft, the motor shell is fixedly connected with the stator, the motor shaft is in interference press fit with the rotor, the motor shell is a high-strength aluminum alloy shell, and the stator is a high-strength aluminum alloy shell. The rotor is arranged in the shell, the rotor and the stator are thermally sleeved together in a heating expansion mode, a protective sleeve is arranged on the inner side of the stator, the protective sleeve is pressed on a corresponding mounting position of the shell to perform sealing protection on the rotor, the motor shaft is a hollow shaft, an oil path channel is arranged in the motor shaft, and the oil path channel is communicated with an air gap between the stator and the rotor. Through the integrated and compact design, the space occupation is reduced, the weight is reduced, the manufacturing cost and the assembly cost are reduced, and the performance and the heat dissipation of the motor are greatly improved.

The invention belongs to the technical field of aluminum alloy material processing, and discloses a cryogenic treatment process of a 7xxx series high-strength aluminum alloy pipe, the process sequentially comprises three core steps of solution treatment, cryogenic treatment and aging treatment, and the 7xxx series high-strength aluminum alloy pipe is obtained by accurately controlling key parameters of each step. The technical problems that in a traditional T6 heat treatment process, a 7xxx series aluminum alloy pipe is uneven in precipitated phase distribution, grain refinement is insufficient, the strength and plasticity are difficult to consider, and internal stress is large are solved. After being treated by the process, the tensile strength of the pipe is improved to 705MPa, the yield strength is improved to 678MPa, the ductility is improved to 11.8%, the size of a precipitated phase in a microstructure is smaller, distribution is more uniform, the internal stress is remarkably reduced, the size stability is greatly improved, industrial batch production can be realized, and the requirements of the fields of aerospace, rail transit and the like on the high-performance aluminum alloy pipe are met.

The invention relates to the technical field of extrusion dies, in particular to a high-strength aluminum alloy extrusion die temperature compensation system which comprises a divergent die, a die holder and a die body, a plurality of divergent bridges are arranged on the divergent die, a die core is arranged in the middle of the divergent die, the divergent bridges are all connected with the die core, and the die holder is coaxially connected to the front end face of the divergent die through bolts; the water pressing groove is formed in the front end of the die holder, the section of the water pressing groove is designed to be in the frustum shape, and cooling liquid entering the water pressing groove flows from the front end to the rear end, so that the cooling effect on the front end of the forming part is higher than that of the rear end, and the situation that the extrusion forming speed of a high-strength aluminum alloy profile is affected due to temperature reduction is avoided; and meanwhile, the problem that the strength of the high-strength aluminum alloy profile is reduced due to the fact that the grain structure in the high-strength aluminum alloy is suddenly changed due to temperature suddenly changing of the high-strength aluminum alloy profile in the extrusion direction is solved, the physical property of the profile is guaranteed, and meanwhile the surface quality of the profile is guaranteed.

The invention discloses a preparation method of a 2-series ultrahigh-strength aluminum alloy thick plate for spaceflight, and relates to a manufacturing method of an aluminum alloy plate. The invention aims to solve the technical problem that 2219 alloy plates produced by the current production process cannot meet the requirements of high strength and oversize specification of current spacecraft aluminum alloys of some models. The method comprises the following steps: 1, smelting to obtain molten aluminum alloy; 2, casting into a cast ingot by adopting a semi-continuous water-cooling casting method; 3, surface treatment and saw cutting; 4, heating treatment; 5, rolling; 6, shearing; 7, solid solution quenching; 8, straightening treatment; 9, stretching; 10, aging treatment; and 11, precisely sawing to obtain a finished plate. By improving the traditional process, the comprehensive performance of the material is remarkably improved, and the method is particularly suitable for manufacturing aircraft structural parts with harsh requirements. The method is used for preparing the 2-series aluminum alloy.

The invention provides a device and a method for modularly and quantitatively testing thermal runaway exhaust heat flux of a lithium ion battery, and belongs to the technical field of lithium ion battery testing. A framework of the device for modularly and quantitatively testing thermal runaway exhaust heat flux of the lithium ion battery is constructed by high-strength aluminum alloy sections; a top plate with adjustable height and peripheral baffle plates form a limited space inside a space constraint simulation battery pack, a heating trigger device is arranged inside the space constraint simulation battery pack, and a distributed temperature measurement plate array is positioned and fixed around the top of a test battery in the heating trigger device through a slot, so that the arrangement requirements of different experiment working conditions can be met; the real-time monitoring and quantitative analysis of the heat flux of the thermal runaway exhaust in the constraint space are realized; the invention provides a device and a method for modularly and quantitatively testing thermal runaway exhaust heat flux of a lithium ion battery. Experimental reduction and heat quantification of thermal runaway exhaust to a heating process of an adjacent area can be realized.

The utility model belongs to the technical field of shielding cabinets, particularly relates to a portable shielding cabinet made of lightweight composite materials, and aims to solve the problems that a main body structure of an existing device is integrally made of metal materials, and although the metal materials have excellent electromagnetic shielding performance, the self weight of the metal materials is large, so that in a scene needing frequent movement or temporary construction, the electromagnetic shielding performance of the metal materials is poor. In order to solve the problems that a traditional shielding cabinet is extremely inconvenient to carry and consumes a large amount of manpower and material resources, the utility model provides the following scheme that the portable shielding cabinet made of the lightweight composite material comprises a frame main body which adopts a frame type structure; the utility model has the beneficial effects that the frame main body is formed by splicing high-strength aluminum alloy sections, the density is low, the weight is light, the frame type structure is matched, the frame is stable, the portability is obviously improved, the carrying is easy and labor-saving, the corner connecting pieces are made of high-strength engineering plastics, the weight is reduced, electromagnetic conduction is prevented, and the shielding performance is optimized.

The utility model belongs to the technical field of doors and windows, in particular to a novel hollow glass aluminum tube suitable for doors and windows, which comprises an aluminum tube body, glass is arranged on both sides of the aluminum tube body, a sealing rubber strip is fixedly connected between the inner wall of the aluminum tube body and one side of the glass, and a drying agent cavity is arranged on the aluminum tube body. The aluminum pipe body is made of the high-strength aluminum alloy material, the aluminum pipe body and the glass are installed through the sealing rubber strip, direct convection of indoor air and outdoor air is effectively prevented, the drying agent can absorb moisture in the hollow glass, moisture condensation and corrosion are prevented, and through the arrangement of the through holes, the service life of the hollow glass is prolonged. Water in the hollow space in the glass can conveniently enter the aluminum pipe body, so that a drying agent can conveniently adsorb the water, the aluminum pipe body and an external structure are conveniently installed and connected through the grooves, the corrosion resistance of the aluminum pipe body is enhanced through the oxidation film, the corrosion-resistant coating can resist corrosion of acid, alkali, salt and other chemical substances, and the service life of the aluminum pipe body is prolonged. And the service life of the door and window is further prolonged.

The utility model discloses an outdoor high-strength aluminum alloy stand column profile, which belongs to the technical field of aluminum alloy stand column profiles and comprises an inner sleeve, an outer tube is sleeved outside the inner sleeve, grooves are formed in the upper portion and one side of the inner sleeve, bumps are fixedly connected to the upper portion and one side of the interior of the outer tube, and the bumps are arranged in the outer tube. The two protruding blocks are located in the two grooves correspondingly, storage grooves are formed in the periphery of the inner sleeve, and a plurality of reinforcing steel blocks are fixedly connected to the periphery of the inner side of the outer pipe. The inner sleeve, the outer pipe, the reinforcing steel block and the storage groove are arranged, the inner sleeve has certain strength through the outer pipe, meanwhile, the outer pipe enables the inner sleeve and the outer pipe to have better strength through matching of the reinforcing steel block and the storage groove, and therefore the structure has higher strength; therefore, the structure is not easy to deform when being collided by the outside, so that the overall stability of an object assembled by using the structure can be effectively improved.

The utility model discloses a pipe ditch protection device for thermal engineering, which relates to the technical field of thermal engineering auxiliary equipment and comprises a plurality of protection plates, a plurality of openings are fixedly arranged at the tops and the bottoms of the plurality of protection plates, bolts are arranged in the plurality of openings in a threaded manner, the plurality of protection plates are fixedly connected through the bolts, and an elastic cushion is fixedly arranged at the bottom of one of the protection plates. The protection plate is made of high-strength aluminum alloy and provided with the abrasion-resistant and corrosion-resistant coating, the buffering assemblies on the edges of the bottom and the top can effectively absorb and disperse impact of external force and protect a pipe ditch and a pipeline, the heat preservation layer on the inner side can reduce heat loss, heat transmission efficiency is improved, the protection plate can be rapidly connected and detached, and the service life of the protection plate is prolonged. And the construction efficiency is greatly improved.

The invention provides a method for predicting coarse grain defects on the surface of a high-strength aluminum alloy extruded profile, and relates to the field of aluminum alloy image processing. The method for predicting the surface coarse grain defects of the high-strength aluminum alloy extruded profile comprises the following steps: carrying out a hot extrusion experiment and a hot compression experiment; representing an extruded profile and a thermal shrinkage pressure sample to obtain a recrystallization fraction and a recrystallization grain average size; simulating a profile extrusion process and obtaining basic physical quantities of the profile; determining a function relationship between the physical field quantity and the recrystallization fraction and between the physical field quantity and the recrystallization grain average size through data fitting and linear regression, and establishing a prediction mathematical model; establishing a recrystallization grain growth rate model; and realizing surface coarse grain defect prediction of the extruded profile through numerical simulation. According to the method, the distribution position of the coarse grain defects on the surface of the aluminum alloy profile can be accurately predicted, the recrystallization degree, the grain size and the recrystallization grain coarsening rate of each position of the profile are independently quantified, and the coarse grain defects on the surface of the high-strength aluminum alloy extruded profile are accurately evaluated.

The invention belongs to the technical field of fan blades, and particularly relates to a high-strength aluminum alloy fan blade integrated forming device and process, and the high-strength aluminum alloy fan blade integrated forming device comprises an aluminum alloy fan blade shaping mold, a bidirectional moving base and a mold vibration mechanism; the aluminum alloy fan blade shaping mold comprises an aluminum alloy fan blade lower mold body and an aluminum alloy fan blade upper mold body, the aluminum alloy fan blade upper mold body is detachably and fixedly connected to the upper side of the aluminum alloy fan blade lower mold body, and a shaping cavity is formed in a combination of the aluminum alloy fan blade lower mold body and the aluminum alloy fan blade upper mold body. The aluminum alloy fan blade lower die is installed on the two-way moving base, and the die vibration mechanism is installed on the aluminum alloy fan blade lower die. According to the aluminum alloy fan blade, bubbles in the fluid-shaped aluminum alloy raw material can be reduced in the integrated forming process of the aluminum alloy fan blade, and the strength of the aluminum alloy fan blade after integrated forming is improved.