41results about How to "Easy to control appearance" patented technology

The invention discloses an iron-based alloy reactive armor shell with low collateral damage. The shell comprises a reactive armor housing and a reactive armor chamber shell positioned in the reactive armor housing, and is prepared by iron powder of 70-97 parts by weight, copper powder of 2-30 parts by weight and graphite powder of 0.3-1 part by weight through a powder metallurgy method and a subsequent processing technology. A preparation method adopts the powder metallurgy method, and comprises such processes as powder mixing, compression molding, sintering, shaping, oil containing, cleaning, surface treatment and welding. The reactive armor shell prepared by the method is lower in fragment collateral damage effect after the reactive armor effect, and has such advantages as high strength, low cost, controllable shape and batch production.

The invention provides a polyurethane foamed sponge sofa or sponge stool which comprises a liner and an outer pack wrapped outside the liner. The liner is prepared by foaming the following components in parts by weight: 100 parts of at least one polyether glycol, 15-85 parts of toluene diisocyanate, 0.1-0.3 part of tin catalyst, 0.1-0.3 part of amine catalyst, 0.8-6 parts of water and 0.5-2 parts of silicon oil surfactant. The outer pack is prepared by foaming the following components in parts by weight: 100 parts of at least one polyether glycol, 25-80 parts of diphenylmethane diisocyanate, 0.1-0.5 part of tin catalyst, 0.1-0.6 part of amine catalyst, 0.2-3.5 parts of water and 0.3-3 parts of silicon oil surfactant. The polyurethane foamed sponge sofa or sponge stool has the characteristics of simple manufacturing technique, controllable appearance, high production efficiency, low cost, long service life and light weight, and is very convenient to use.

The invention discloses a sponge sofa structure, which comprises a styrofoam sofa base formed by styrofoam foaming, and a sponge layer is integrally foamed on the top surface or the outer surface of the styrofoam sofa base. The sponge sofa structure has the characteristics of simple manufacture technology, easy controlled appearance, high production efficiency and low production cost; in addition, because the styrofoam material is low in price, and has certain support strength and support toughness, the styrofoam material can effectively replace a part of characteristics of hard sponge, the use amount of sponge can be reduced, the material cost of the whole product can be reduced; furthermore, the sponge layer is integrally foamed on the surface of the styrofoam sofa base, is firmly combined with the surface of the styrofoam sofa base, and is not easy to get loose, and the service life of the product can be ensured.

The invention relates to the field of porous material preparation, in particular to a method for preparing ultra-high-strength titanium alloy porous material based on additive manufacturing technology. This method prepares a uniform porous titanium alloy material with adjustable unit cell size and pore shape through "selective laser melting forming technology". By optimizing the process parameters of additive manufacturing and selecting appropriate heat treatment, it can be obtained: the effective density is 0.5-2.0g / cm 3 , the strength can reach 600MPa, and the absorption energy can reach 90MJ / m 3 , A uniform porous titanium alloy bulk material with an elastic modulus of 0.1-20GPa. The method of the invention has simple preparation process and low cost, is suitable for industrialized production, and has good application prospects in the fields of aerospace lightweight design, medical treatment, energy absorption and shock absorption, filtration and the like.

The invention relates to porous material preparation, in particular relates to a method for preparing a high fatigue property porous Ti-6Al-4V bulk material, which is used for solving the problem of low fatigue property of the porous Ti-6Al-4V bulk material of the prior art. The method is that an 'electron beam molten metal molding technology' is utilized to prepare the large Ti-6Al-4V bulk material with the porosity of 50%-95% at first, the porous material is then subjected to two steps of thermal treatment of annealing and aging at 400 DEG C and 1000 DEG C, and the Ti-6Al-4V porous material with high fatigue strength, low elasticity modulus of (0.1-20 GPa) and 'the ratio of fatigue strength / compressive strength' of 0.7 is obtained finally. According to the method, the mechanical performance of the porous Ti-6Al-4V pore wall material is controlled through a thermal treatment technology, and thus, a large titanium alloy porous material with excellent fatigue property is obtained and can be widely applied to the fields of aerospace, medical treatment and the like.

The invention provides a process method for printing soldering paste bodies on a circuit board in a three-dimensional (3D) manner. The process method is a process method capable of accurately printing soldering paste bodies in a three-dimensional (3D) manner. With the process method adopted, the shapes of the soldering paste bodies are controllable, the coating efficiency of soldering paste is high, and different thickness and different shapes can be realized. According to the technical schemes of the invention, the process method is implemented through following manners: a layer of flux of which the shape conforms to the shape of a pad is printed so as to be adopted as a solder powder fixing medium; a layer of solder powder is printed on the flux at a position where the pad is located; after one independent soldering paste body is obtained through layer-by-layer printing, a next soldering paste body is printed; flux layers and solder powder layers which are printed layer by layer are mixed, so that the soldering paste bodies can be formed in real time in a printing process; the flux layers and solder powder layers are printed alternately so as to form required soldering paste bodies; flux is printed at the last layer, so that the 3D printing of the soldering paste is terminated; and flux and solder powder multi-layer liquid naturally compounded soldering paste body layout distribution of different thicknesses and different shapes can be formed on the same printed circuit board.

The invention discloses a method for repairing wear and cracks of blade crowns and sealing teeth. Laser cladding technology is used to repair the worn parts of turbine blade crowns and sealing teeth and the cracks of blade crowns and sealing teeth. It can be cut and processed to restore its external dimensions to the original design geometric dimensions and technical indicators, and can be used again. Laser cladding has the characteristics of rapid melting. Compared with the conventional as-cast structure, the substructure of the laser cladding solidified structure is significantly refined, and a fine and uniform alloy structure can be obtained. The mechanical properties of the turbine blade after laser cladding repair are close to the forging standard.

The invention discloses a shape-controllable dress form robot based on segmented skins. The dress form robot comprises a plurality of parts which respectively simulate the shapes of buttocks, the chest, the waist and shoulders, wherein each part is composed of an inner shape driving module of a multilayer structure and an outer skin characterized by a segmented curved surface. Each inner shape driving module is composed of a plurality of spatially distributed linear propelling mechanisms, and the linear propelling mechanisms control the deformation of the segmented curved surfaces. By adjusting the propelling amount of the linear propelling mechanisms, the shape of the segmented curved surface pieces is controlled, and the simulation of the transverse shape of a human body is realized. Therelative distance between adjacent parts is controlled by a displacement adjusting supporting mechanism, so that the simulation of the longitudinal height of the human body is realized. The fitting result of the human body is represented by the tights worn on the robot, and the robot can be used for simulating the shape of the human body of a customer in garment customization and simulating the dressing effect of a real person on a garment by the robot in the online and offline garment sale.