17results about How to "Improve local strength" patented technology

The invention provides a PbZrO3 antiferroelectric capacitor and a preparation method thereof, and relates to the technical field of ferroelectric materials, the PbZrO3 antiferroelectric capacitor comprises a first electrode layer, a PbO layer, a solid solution ferroelectric antiferroelectric layer, a LaNiO3 layer and the like, and phases in the solid solution ferroelectric antiferroelectric layer comprise PbZrO3, a ferroelectric and an Ag-containing Au phase. The invention also provides a preparation method of the capacitor, and the method comprises the following steps: depositing a LaNiO3 precursor solution on a single crystal substrate, and carrying out the crystallization; mixing the PbZrO3 precursor solution with the ferroelectric precursor solution, and then adding Au nanoparticles containing Ag; the LaNiO3 layer is coated with the mixed solution, and crystallization is carried out; depositing the PbO precursor solution on the surface of the antiferroelectric layer of the solid solution ferroelectric, and crystallizing; and carrying out gold electrode deposition to obtain the PbZrO3 antiferroelectric capacitor. The capacitor is high in energy storage efficiency and high in dielectric constant.

The utility model relates to fan maintenance technical field discloses a kind of impeller dismounting device, including first clamping piece, second clamping piece, pusher plate and at least two installation rods;First clamping piece and second clamping piece are all provided with clamping cavity, and each clamping cavity is provided with inner lug;First clamping piece and second clamping piece are all provided with outer lug, and the clamping cavity is formed accommodating cavity after being connected by first clamping piece and second clamping piece, and the matching design of inner lug and impeller radial groove is combined, the accurate positioning and uniform clamping of impeller are realized;Outer lug is used as structure reinforcing part, not only strengthen the local strength of first clamping piece and second clamping piece, also provide stable installation base for installation rod, so that the axial force transmitted by installation rod of pusher plate can be uniformly, stably act on the matching surface of impeller and motor shaft, avoid direct artificial knock impeller or heat impeller shaft sleeve to cause impeller or motor shaft damage, significantly improve dismounting efficiency and security.

The utility model discloses a front bumper and upper grille riveting structure which comprises a front bumper body and an upper grille body, bumper sharp corners are arranged at the two ends of the front bumper body, grille sharp corners are arranged at the two ends of the upper grille body, and the bumper sharp corners and the grille sharp corners are arranged oppositely. The bumper sharp corner is provided with a rotatable connecting piece, the grille sharp corner is fixedly provided with a rivet hole inserting piece, the connecting piece and the rivet hole inserting piece are both provided with riveting holes, and the connecting piece and the rivet hole inserting piece are riveted through a rivet. The riveting structure of the front bumper and the upper grating is simple in layout and ingenious in conception, not only can guarantee smooth demolding of two parts, but also can increase the connection strength, adopts the simplest injection molding and riveting process, and plays roles in increasing local strength and preventing local deformation in the structure. According to the structure, a long-term and stable manufacturing process of the product can be realized only by inputting a simple riveting tool, so that the reliability of the product is improved, the manufacturing cost of the product is greatly reduced, and the project expense is reduced.

The application discloses a kind of local reinforcement selected area laser melting deposition high-strength titanium alloy preparation method and system, belong to additive manufacturing technical field.The local reinforcement selected area laser melting deposition high-strength titanium alloy preparation method provided by the application, by establishing target titanium alloy structure three-dimensional model and carrying out finite element limit load simulation analysis, stress distribution and potential dangerous area are identified;Based on the analysis result, the performance requirement is divided, the material enhanced local area is determined, and the laser scanning path and powder feeder movement trajectory are planned;Path file is imported into composite equipment to set process parameters;Titanium-based composite material powder is selectively laid in the enhanced area, and a locally reinforced structure is obtained by selective laser melting.The scheme realizes the spatial selective distribution of powder composition, forms a uniform distribution of high-stress areas, significantly improves the local strength and maintains the overall strength and plasticity matching, effectively solves the problem of insufficient performance matching of titanium alloy components under complex load.

A vehicle body side wall double-door ring structure comprises a single-door ring sub-assembly and a C column sub-assembly, the single-door ring sub-assembly comprises an A column upper edge beam middle section, an A column upper edge beam lower section, an A column lower reinforcing plate, a threshold front reinforcing plate and a threshold rear reinforcing plate which are sequentially connected to form a first door ring, and the C column sub-assembly comprises a second door ring sub-assembly and a third door ring sub-assembly. The C-column sub-assembly comprises an A-column upper edge beam upper section and a C-column lower reinforcing plate, the A-column upper edge beam middle section, the A-column upper edge beam upper section, the C-column lower reinforcing plate and the threshold rear reinforcing plate are sequentially connected to form a second door ring, at least one of the connecting positions of all the part material pieces is in lap spot welding connection, and the rest part material pieces are in laser tailor welding connection. And the connected integrated material sheets are formed through hot stamping. According to the double-door-ring structure, laser tailor-welding and local lap joint are adopted at the same time, then integral hot stamping forming is conducted, on the basis of tailor-welding, a local overlapping lap joint spot welding area is increased, structural lap joint is optimized, a structural weak area is avoided, and local strength is improved without additional reinforcing pieces.

The invention relates to the technical field of vehicles, and discloses an engine hood and a vehicle. The hood includes an outer plate and an inner plate. The inner plate is arranged on the inner side of the outer plate, the inner plate comprises an inner plate frame and three connecting ribs, the inner plate frame is connected with the outer plate, the inner plate frame is provided with a central hollowed-out part, the central hollowed-out part extends in the left-right direction so that the inner plate frame can be annular, the cross section of each connecting rib can be in a flat plate shape, and the three connecting ribs are sequentially arranged on the central hollowed-out part at intervals from left to right; and two ends of the connecting rib are respectively connected with the front edge and the rear edge of the central hollow part. When observed in the top view direction of the inner plate, the ratio of the area of the central hollow part to the total area of the inner plate is larger than 50%. Through the central hollow part and the connecting ribs, the rigidity of the middle area of the engine hood is reduced, the collision probability of the human body and the entity part of the inner plate is reduced, and the impact force on pedestrians in the collision process is reduced. And the torsion resistance of the inner plate frame is improved, the local strength of the inner plate is prevented from being too high, and damage to pedestrians during collision is reduced.

The invention relates to a structure optimization method of a speed reducer box body, which comprises the following steps of: carrying out static simulation and modal analysis on the speed reducer box body on the basis of stress of each part of a gearbox in a force transmission form of gear transmission without axial force under an actual working condition, and extracting a weak structure of the speed reducer box body under static and dynamic simulation calculation; response surface optimization is carried out for the weak structure of the speed reducer box body, and an optimized box body model is obtained; the design variables of response surface optimization are the thicknesses of two output end bearing seats of a main shell in a reducer box body, the lengths of all reinforcing ribs around an input shell, the thickness of a face gear bearing supporting plate in the main shell and the thickness of an input shaft bearing seat; the target variables are the maximum deformation amount of the box body, the maximum linear stress value of the bearing supporting seat and the mass of the box body; and multi-target topological optimization is carried out on the basis of the reducer box body after the response surface optimization, and design variables obtained by the installation and direct force bearing part and the response surface optimization are used as non-optimization areas in the boundary condition setting of the multi-target topological optimization.

The utility model provides an LED lamp with high stability performance, the LED lamp with high stability performance comprises an LED lamp cover, the LED lamp cover comprises a back plate, the back plate is sequentially provided with a first reinforcing protruding strip, a second reinforcing protruding strip, a third reinforcing protruding strip, a fourth reinforcing protruding strip and a fifth reinforcing protruding strip from left to right, and the first reinforcing protruding strip, the second reinforcing protruding strip, the third reinforcing protruding strip, the fourth reinforcing protruding strip and the fifth reinforcing protruding strip are sequentially arranged on the back plate from left to right. The two ends of the first reinforcing protruding strip, the two ends of the third reinforcing protruding strip and the two ends of the fifth reinforcing protruding strip are flush with the two ends of the back plate, and the length of the second reinforcing protruding strip and the length of the fourth reinforcing protruding strip are smaller than the length of the back plate. The stability of the LED lamp is improved, meanwhile, line distribution is optimized, the installation difficulty is lowered, and later maintenance is facilitated.

The invention discloses a fiber reinforced composite material guardrail system and a production process, the fiber reinforced composite material guardrail system comprises a guardrail, a stand column and an anti-blocking block, the guardrail is a fiber reinforced composite material elastic sheet, and the cross section of the guardrail is of a continuous three-wave structure with a semi-closed opening; extension parts extend from two wave end points on the outermost side of the guardrail, and each extension part comprises an arc-shaped part and a straight part; adjacent guardrails are lapped along scales; the anti-blocking block is provided with a supporting structure. The product can be self-lapped and can be replaced with a steel plate with the same specification by a single plate, and a good protection effect can be achieved; through the extending parts, better elastic supporting can be achieved, the connecting strength of the guardrail and the pins is enhanced, the pultrusion technology can improve the local strength of the elastic sheet while low-cost production is achieved, and the strength requirement is met while economical efficiency is achieved in cooperation with the strength structure design.

The invention relates to a fan structure for a small temperature rise centrifugal vapor compression device, and relates to the technical field of vapor compression, the fan structure comprises a volute, a main shaft body is rotatably arranged in the volute, the main shaft body is sleeved with a hub body, the hub body is sleeved with a front disc body and a rear disc body, and the main shaft body, the hub body, the front disc body and the rear disc body are coaxially arranged; a plurality of blades are welded among the front disc body, the rear disc body and the hub body, an air seal seat is arranged between the volute and the main shaft body and located on the side, away from the front disc body, of the rear disc body, a plurality of large auxiliary blades and a plurality of small auxiliary blades are fixedly arranged on the side, away from the blades, of the rear disc body, and the large auxiliary blades are located on the sides, away from the hub body, of the small auxiliary blades. A plurality of trapezoidal grooves are formed in the front disc body, and the number of the trapezoidal grooves is consistent with that of the blades. The impeller has the effects of reducing the failure rate of matched operation of the impeller and the main shaft and improving the matched operation stability of the impeller and the main shaft.

The utility model belongs to the technical field of cutters, and discloses a drilling blade and a drilling cutter, in the extension direction of a cutting edge playing a cutting role and in the preset direction far away from the edge center of the drilling cutter, L is gradually reduced, and L difference values corresponding to any two preset sections spaced by unit length are equal; the preset direction is the extension direction of the acting cutting edge, and the edge width of the cutting edge close to one side of the central axis of the cutter bar is increased in the radial outward direction of the central axis of the cutter bar, so that the structural strength of the cutting edge close to the drill core is improved, and meanwhile, the sharpness of the cutting edge away from the drill core is ensured; on the premise of ensuring the sharpness of the cutting edge of the drilling blade, the local strength of the cutting edge is improved, so that the service life of the drilling blade is prolonged. During cutting, the structural strength of the cutting edges at all positions of the whole cutting edge is in a proper level under the corresponding working condition, and the situation that the strength of a certain position on the cutting edge is relatively too low, and consequently the cutting edge loses efficacy first is not prone to occurring.

The present invention discloses a front door ring for an automobile, comprising: an automobile A-pillar including an upper section of an A-pillar and a lower section of an A-pillar, wherein the upper section of the A-pillar has a first soft zone for welding with a roof cross beam; an automobile B-pillar including an upper section of a B-pillar and a lower section of a B-pillar; a front door sill whose front and rear ends are respectively fixed to the rear side of the lower part of the lower section of the A-pillar and the front side of the lower part of the B-pillar; a rear door sill fixed to the rear side of the lower section of the B-pillar; the upper section of the A-pillar except the first soft zone, the lower section of the A-pillar, the upper section of the B-pillar, the front door sill and the rear door sill are all hard zones, and the lower section of the B-pillar is a second soft zone. The present invention also discloses a manufacturing method of the above automobile front door ring and an automobile including the above automobile front door ring. The automobile front door ring, the manufacturing method thereof and the automobile provided by the present invention have the advantages that the automobile A-pillar and the roof cross beam are not prone to cracking, the front door ring has good buffering performance, can shrink and absorb energy when impact occurs, and can control the deformation of the front door ring, which is beneficial to protecting the heads of drivers and passengers, and has good safety.

The invention discloses a preparation process of a high-strength carbon fiber pipe, and relates to the technical field of carbon fiber pipes. The invention relates to a preparation process of a high-strength carbon fiber pipe. The preparation process comprises the following steps: S1, preparing a carbon fiber prepreg; s2, preparing a reinforced inner layer; s3, preparing a reinforcing layer; s4, the prepared reinforcing layer is evenly laid on the carbon fiber prepreg, then the prepared reinforcing inner layer is laid on the reinforcing layer, and a carbon fiber base layer is obtained; s5, the metal core rod is coated with a release agent; the carbon fiber prepreg and the reinforcing inner layer are combined for use, the overall strength, wear resistance and corrosion resistance of the carbon fiber pipe can be obviously improved, meanwhile, the reinforcing layers are additionally arranged in the carbon fiber prepreg and the reinforcing inner layer, on one hand, the local strength of the carbon fiber pipe can be effectively enhanced, on the other hand, the heat resistance of the carbon fiber pipe can be enhanced, and the service life of the carbon fiber pipe is prolonged. And the device can be suitable for different use environments.

The invention provides a pavement repairing structure of a base layer structure type crack and a green disposal method thereof, and the method comprises the following steps: step 1, according to a crack distribution condition, determining dimensions of surrounding cracks in x and y directions, the x direction being a driving direction, the length being A, the width being B and the depth being D, and the thickness of a panel needing to be cut; 2, determining whether the main distribution directions of the main cracks on the x plane and the y plane are x direction, y direction or xy direction; thirdly, a plurality of kerfs are arranged in the direction parallel to the main distribution direction of the main cracks, the kerf width is 2 cm, the kerf depth is D, the distance S between every two adjacent kerfs is equal to the distance between the old pavement cracks, the average value is obtained, and according to the arrangement, the corresponding kerfs are cut in the direction of the main cracks in the second step; and then the kerfs are cleaned, grouting repair should be conducted on the bottom void areas of the plates, then grouting reinforcement is conducted on the kerfs, asphalt sealing is conducted on the crack areas, and after the crack areas are treated, maintenance and paving of the whole pavement are conducted.

The present application relates to the technical field of lithium battery structures, in particular to a polished aluminum sheet for a lithium battery, a top cover, and a lithium battery. The polished aluminum sheet for a lithium battery comprises: a polished aluminum sheet body provided with an explosion-proof hole suitable for mounting an explosion-proof valve therein; a first reinforcing portion protruding or recessed from one surface of the polished aluminum sheet body and continuously or discontinuously surrounding the explosion-proof hole, the first reinforcing portion being spaced apart from the explosion-proof hole; and a second reinforcing portion protruding or recessed from the other surface of the polished aluminum sheet body and continuously or discontinuously surrounding the explosion-proof hole, the second reinforcing portion being spaced apart from the explosion-proof hole. According to the polished aluminum sheet for a lithium battery, the top cover, and the lithium battery which are provided in the present application, the local strength at the position on the polished aluminum sheet where the explosion-proof valve is mounted can be enhanced, such that the explosion-proof valve is prevented from deforming.

A thyristor assembly with multiple combined chips comprises a shell and a base, the base is provided with at least three groups of chipsets which are combined to form a rectangular shape, and each chipset comprises a chip, an electrode, a first conductive plate, a second conductive plate, a third conductive plate and a fourth conductive plate. The first current-conducting plate, the second current-conducting plate, the third current-conducting plate and the fourth current-conducting plate are spliced to form a rectangular shape. The at least two chip sets are arranged on the same base in parallel, and the four current-conducting plates are spliced into the rectangle, so that the internal space of the shell is fully utilized, the whole assembly is more compact, the tedious procedure of selecting from multiple groups when three or more groups are formed by two chips as one group in the prior art is eliminated, and the production efficiency is improved. Therefore, the installation efficiency and the assembly consistency are obviously improved. The overall structure is reasonable, the space utilization rate is high, material waste is reduced, the size of the shell is reduced, miniaturization design and on-site rapid replacement of equipment are facilitated, and the system integration degree and operation and maintenance convenience are further improved.