39results about How to "Good strength and stiffness" patented technology

The invention relates to the technology of machining manufacturing of automobile parts made of carbon filer composite materials, in particular to a manufacturing method of an automobile engine cover made of the carbon fiber composite materials. The manufacturing method is mainly applied to machining manufacturing of the engine cover made of the carbon fiber composite materials of different thicknesses. The process procedure includes the steps of clipping carbon fiber cloth, laying the carbon fiber cloth, arranging the multi-layer carbon fiber cloth into a die, conducting resin vacuum pouring, conducting vacuum heating and heat preservation, conducting demolding, taking out a workpiece and conducting trimming. The manufacturing method is characterized in that the carbon fiber cloth is clipped and designed, and the laid carbon fiber cloth layers in different shapes are put into the die and then subjected to resin pouring; and due to the fact that the thicknesses of the compositely formed engine cover made of the carbon fiber composite materials are different, the requirements for strength and rigidity of the engine cover are met, and the weight can be reduced.

An oriented strand board panel and a method for making the same are provided. The OSB panel has at least three layers, namely, a top surface layer, a core layer, and a bottom surface layer. A first cover layer may be provided on the top surface layer. Likewise, a second cover layer may be provided underneath the bottom surface layer. The first cover layer and / or the second cover layer may have a smaller strand angle, defined by an average deviation of strands from a longitudinal axis, than the top surface layer and the bottom surface layer. The smaller strand angles for the first cover layer and / or the second cover layer provide the OSB panel with greater stiffness and strength along the strong direction of the panel without significant compromise of strength and / or stiffness in the weak direction of the panel.

The invention provides a hard rock cutterhead and a cantilever heading machine comprising the same. The hard rock cutterhead comprises a conical cutterhead main structure; the cutterhead main structure comprises a head, spokes and a flange; the head is connected with the spokes, the spokes are connected with the flange, and the head and the spokes are provided with detachable cutters. The cantilever heading machine comprises the hard rock cutterhead. The hard rock cutterhead and the cantilever heading machine comprising the same have the advantages that the stress of the cutterhead structure is more uniform, the deformation resistance and break resistance are high, and the high-thrust high-rotation-speed excavating working condition can be borne; the cutterhead is formed by machining a complete plate or welding steel plates, and the overall strength and stiffness are better; the cutters adopt the form that end covers are located on cutter seat installation surfaces, and the rock breaking efficiency can be improved; a cutterhead center hobbing cutter can be drawn back when the cutterhead conducts swing cutting, and eccentric abrasion, cutting edge breaking and other abnormal damageoccurring to the center hobbing cutter are effectively avoided; hobbing cutters and toothed cutters are subjected to interchange installing, soft soil excavation can be achieved, and in addition, hardrock can be subjected to expanding excavation; and the cutterhead swings up and down as well as leftwards and rightwards, and round and special-shaped fracture surfaces can be excavated.

A microelectronic spring contact for making electrical contact between a device and a mating substrate and method of making the same are disclosed. The spring contact has a compliant pad adhered to a substrate of the device and spaced apart from a terminal of the device. The compliant pad has a base adhered to the substrate, and side surfaces extending away from the substrate and tapering to a smaller end area distal from the substrate. A trace extends from the terminal of the device over the compliant pad to its end area. At least a portion of the compliant pad end area is covered by the trace, and a portion of the trace that is over the compliant pad is supported by the compliant pad. A horizontal microelectronic spring contact and method of making the same are also disclosed. The horizontal spring contact has a rigid trace attached at a first end to a terminal of a substrate. The trace is free from attachment at its second end, and extends from the terminal in a direction substantially parallel to a surface of the substrate to the second end. At least a distal portion of the trace extending to the second end is spaced apart from the surface of the substrate. The spaced-apart distal portion is flexible in a plane parallel to the substrate.

The present disclosure provides a DRAM cell structure. The DRAM cell structure includes a substrate, a gate structure disposed in the substrate, a source region and a drain region disposed in the substrate respectively at two sides of the gate structure, a landing pad disposed over the drain region, a plurality of carbon nanotubes disposed on the landing pad, a top electrode disposed over the plurality of carbon nanotubes, and a dielectric layer disposed between the top electrode and the plurality of carbon nanotubes.

An open cell or highly porous woven composite truss utilizes fibers of carbon, glass, ceramic, or the like that are woven together in a loom. The warps or tow are woven with the wefts, while the fibers are impregnated with resin. The resin impregnation step may be performed before or after the weaving step. The truss is then cured on the loom and later may be machined as needed. A rigid foam material may be used to stabilize the shape of the truss prior to curing and while machining. The foam may be later chemically dissolved or otherwise disposed of.

The invention discloses an adjustable support pad stone template. The adjustable support pad stone template comprises a rectangular template and a template adjusting device, wherein the rectangular template is made of square steels; the rectangular template is made by connecting two transverse square steels with two vertical square steels; the transverse square steels and the vertical square steels, which are adjacent to each other, are detachably connected with each other through connecting devices; the template adjusting device comprises angle irons and angle screws which are correspondinglypaired with the square steels; the template adjusting device is movably connected with the rectangular template and used for adjusting elevation of the template and height differences of four cornersof the top surface of the template; and the angle screws are fixed at the four corners of the angle irons. According to the adjustable support pad stone template, it can be guaranteed that the elevation of support pad stone is accurate and the height differences of the four corners of the support pad stone conform to a specified value; and the quality of the support pad stone can be improved.

The invention discloses a thrust chamber body outer wall structure of a liquid propellant rocket engine. The structure comprises an expansion section outer wall (2), a throat section outer wall (3), acylindrical section outer wall (4) and a liquid collecting ring upper cover (5); one end of the throat section outer wall (3) is connected with the expansion section outer wall (2), and the other endof the throat section outer wall (3) is connected with the cylindrical section outer wall (4); the cylindrical section outer wall (4) is provided with a radial hole (7) and a liquid collecting tank (6); the liquid collecting ring upper cover (5) is connected with the cylindrical section outer wall (4) to form a liquid collecting cavity (8); and the liquid collecting cavity (8) communicates with an external inner wall groove through the radial hole (7) and the liquid collecting tank (6) in sequence. The outer wall structure has the advantages of good assembly property, improvement of the dispersion welding line quality and the like; and meanwhile, the outer wall structure also achieves the function of a liquid collecting ring, is excellent in flowing uniformity and low in pressure loss, reduces the part number, and improves the reliability of a thrust chamber body part.

The present invention proposes a hard rock cutterhead and a cantilever roadheader comprising the cutterhead. The hard rock cutterhead includes a conical cutterhead main structure, the cutterhead main structure includes a head, spokes and flanges, and the head and spokes The spokes are connected to the flange, the head and the spokes are provided with detachable cutters, and the cantilever boring machine includes the above-mentioned hard rock cutter head. The advantages of the invention: the cutterhead structure is more uniform in force, has a strong ability to resist deformation and damage, and can withstand high thrust, high speed and other driving conditions; the cutterhead is made of whole plate processing or steel plate welding, and the overall strength and rigidity are higher. Good; the cutter adopts the form that the end cover is located on the mounting surface of the cutter seat, which can improve the rock-breaking efficiency; the center hob of the cutter head can be retracted when the cutter head swings and cuts, effectively avoiding abnormalities such as eccentric grinding and edge chipping of the center hob Damage problem; the interchangeable installation of the hob and toothed cutter can excavate not only soft soil but also hard rock; the cutter head can swing up and down, left and right, and can excavate circular and special-shaped sections.

The invention discloses a cutter head of a multi-mode shield machine and the shield machine thereof. block and sub-beam, the center block is set in the middle of the cutter head body, the center block is provided with a hob, the center block is connected with the outer ring through the main beam, and the rear part of the center block is detachably provided with a pipeline transition Mechanism; the sub-beam is connected to the main beam through a twisted leg base, and the rear part of the sub-beam is detachably provided with a slag sliding structure; both the main beam and the sub-beam are equipped with knives. In the invention, the knives are evenly distributed, and the structure of the cutter head is reasonable. The middle part of the cutter head adopts a reinforced central block design, which reduces the deformation of the cutter head during the excavation process; The probability of build-up is reduced, reducing wear on the deck face.

The invention discloses a tall and large workshop self-made grid platform used as an electromechanical pipeline and a construction method of the platform. The platform comprises a C sectional steel truss and punched CL sectional steel, the C sectional steel truss comprises longitudinal C sectional steel and transverse C sectional steel, and a closed end, opposite to an open end, of the punched CLsectional steel is fixedly connected to a roof steel structure main beam through right-angled tube bundles and antiskid nuts; the open end of the punched CL sectional steel is connected to one end ofgalvanized angle steel through a first L-shaped frame, a connecting plate and bolts; the longitudinal C sectional steel is electrically welded to the other end of the galvanized angle steel; the lowerportion of the C sectional steel truss is connected with an air pressure pipe, a fire service pipe, a wire groove and a wire tube through connecting rods, and the lower portion of the C sectional steel truss is connected to a ceiling by adopting a first through-thread suspension rod. By adopting the self-made grid platform, the dense installation of roof brackets is reduced, extension brackets are made by using the grid platform, the problems of installation and fixation of wire grooves, pipelines and air ducts in a large space are solved, and the platform also can be used as a suspended ceiling keel.

The invention relates to a high-temperature-resistant corrosion-resistant diaphragm core material. The material is characterized in that by weight, 55-65% of ethylene-propylene-diene monomer rubber and 0.8-1.5% of dicumyl peroxide (DCP) are weighed and evenly mixed at normal temperature, then the mixture is added into a first feed inlet of a double-screw extruder for mixing, 10-15% of naphthenic oil is injected after mixing, and then 25-30% of polypropylene and 8-13% of talcum powder are evenly mixed and added into a second feed inlet of the double-screw extruder to be extruded and granulated.The material has the advantages that temperature resistance and corrosion resistance are high, physical property indexes of the material are hardly reduced at a high temperature, and solid-liquid separation work under a relatively high temperature environment can be achieved.

The invention relates to the technical field of pipes, in particular to an XSC50 cold shrinkage type lining plastic aluminum alloy pipe and pipeline system used for fuel gas and a manufacturing method. The XSC50 cold shrinkage type lining plastic aluminum alloy pipe is composed of an XSC50 resin pipe layer, an aluminum pipe layer, an oxidation film protection layer and a high-adhesive-force oxidation-corrosion-prevention layer which are sequentially arranged from inside to outside. The XSC50 resin pipe is used as the raw material, and therefore the manufactured XSC50 cold shrinkage type lining plastic aluminum alloy pipe can be high in mechanical strength, good in tenacity, quite good in strength rigidity in a high-temperature environment, high in heatproof grade and suitable for working under various environments. Meanwhile, the aluminum pipe and the XSC50 resin pipe are connected in a seamless manner through cold shrinkage and can be firmly combined without adhesives; due to the adoption of the XSC50 resin pipe layer of a certain thickness, the aluminum pipe layer of a certain thickness, the oxidation film protection layer of a certain thickness and the high-adhesive-force oxidation-corrosion-prevention layer of a certain thickness, the strength of the manufactured pipeline reaches about 5.5 MPa at the temperature being 70 DEG C within 50 years; and meanwhile the manufacturing cost is controlled. The manufacturing method is simple, and the manufactured XSC50 cold shrinkage type lining plastic aluminum alloy pipe is excellent in performance and has important significance in promoting application and development of fuel gas pipes.

The invention relates to a quick manufacturing process for carbon fiber reinforced paste resin. The quick manufacturing process mainly comprises the following steps of: processing a PS foam board, sequentially performing extrusion-coating on an epoxy paste resin material, a carbon deposition fiber reinforced resin layer and adhesive support, removing the PS foam board to support, position and process a surface, which is separated from the PS foam mould, of the epoxy paste resin material, and performing surface treatment on the processed surface to obtain a final workpiece. Automobile carts manufactured by the quick manufacturing process are short in processing time and are high in processing precision, and processed parts can be modified by many times to meet requirements of a developer. Compared with conventional injection-molding and stamping, the quick manufacturing process greatly shortens development time, reduces cost, and meets physical properties needed, and therefore, a quickand precise process route is provided for developing and repairing automobile part products.