77results about How to "Small degree of deformation" patented technology

An internal combustion engine includes a variable compression ratio mechanism made up of a case-side bearing-forming portion, a block-side bearing-forming portion, and a shaft-shaped drive portion. The case-side bearing-forming portion is formed in an upper portion of a crankcase. The block-side bearing-forming portion extends outward from a lower end portion of an outer wall surface of the cylinder block. The block-side bearing-forming portion is linked to the case-side bearing-forming portion by the shaft-shaped drive portion. Slit-shaped stress reduction groove portions each having an opening in a region between the block-side bearing-forming portion and cylinder bores are formed in a lower surface of the cylinder block. Therefore, even when the block-side bearing-forming portion presses the outer wall surface, the stress reduction groove portions reduce the stress, so that the deformation of the wall surface of each cylinder bore can be restrained.

The invention discloses a carbon fiber sheet, comprising no more than six layers of carbon fiber prepreg and no more than two layers of glass bead-filled epoxy sheet laminate, the glass bead-filled epoxy sheet laminate It is arranged at the middle layer position of several carbon fiber prepregs, and a layer of carbon fiber woven cloth prepreg is added between the carbon fiber prepregs and carbon fiber prepregs, carbon fiber prepregs and glass bead-filled epoxy sheet laminates . The carbon fiber sheet prepared by the invention has flame retardancy, low degree of deformation, light weight, and is easy to produce in batches, and is especially suitable for light-weight application of electronic products.

A stator disc for a turbomolecular pump has an inner ring (3), an outer ring (4), and a plurality of vanes (2) formed of a stator disc plane, extending between the inner and outer rings (3, 4), and having, in connection regions of the vanes with the inner and outer rings, respective radial webs (5) a circumferential width (S) of which is smaller than a vane width (T).

The invention discloses a wide-angle lens infrared image distortion correction method. The method comprises steps that S1, an original distortion image of a target calibration template is shot, threshold segmentation and edge extraction of the original distortion image are carried out to acquire a distortion edge image; S2, a distortion model is established according to the distortion edge image, and a distortion coefficient is acquired; S3, the new position of an edge pixel point is solved according to the distortion coefficient, position transformation is realized, and an edge distortion correction image is generated; and S4, gray correction of the edge distortion correction image is realized by utilizing multiple times of fitting and a bilinear interpolation algorithm. The method can realized distortion correction of a wide-angle lens infrared image, an image distortion degree is reduced, and accuracy and reliability of measured parameters are improved.

The liquid crystal panel has a front-surface plate, a front-side polarizing plate, a liquid crystal display element, and a rear-side polarizing plate in an integrally laminated state, in which the front-surface plate and the front-side polarizing plate are in the state of being laminated with each other via an adhesive layer having a thickness of 2 μm or more, and the liquid crystal panel satisfies Formula A-1: 2020>ECp×dCp×εCp×(100−P)+(Ef×df×εf)−(Er×dr×εr)>0 (ECp is the modulus of elasticity, dCp is the thickness, and εCp is the humidity dimensional change rate, of the front-surface plate, Ef is the modulus of elasticity, df is the thickness, and εf is the humidity dimensional change rate, of the front-side polarizing plate, Er is the modulus of elasticity, dr is the thickness, and εr is the humidity dimensional change rate, of the rear-side polarizing plate, P is the stress relaxation rate of the adhesive layer).

The invention relates to a ceramic, a ceramic injection molding feeding material and a preparation method thereof. The ceramic injection molding feeding material comprises, by mass, 80-83% of ceramicpowder and 17-20% of a binder. The binder comprises a water-soluble binder and a water-insoluble binder. A mass ratio of the water-soluble binder to the water-insoluble binder is (60-70): (23-35). TheCIM research process comprises researching binder selection, molding and discharge. The ceramic, ceramic injection molding feeding material and preparation method thereof have the advantages of low cost, short degreasing time, high efficiency, environmental pollution, no pollution and small product deformation.

The invention discloses a three-layer solid wood composite electric heating floor and a manufacturing method thereof. The three-layer solid wood composite electric heating floor comprises a decoration wood veneer, an upper insulation layer, an electric heating chip, a lower insulation layer and a three-layer solid wood base material layer. The three-layer solid wood base material layer is formed by laminating an upper wood veneer, a lower wood veneer and a solid wood batten base material layer clamped between the upper wood veneer and the lower wood veneer. The decoration wood veneer, the upper insulation layer, the electric heating chip, the lower insulation layer and the three-layer solid wood base material layer are sequentially overlapped and laid from top to bottom and laminated into the complete floor. The lower surface of the decoration wood veneer is coated with insulation resin glue to form the upper insulation layer and is attached to the upper surface of the electric heating chip. The upper surface of the three-layer solid wood base material layer is coated with insulation resin glue to form the lower insulation layer and is attached to the lower surface of the electric heating chip. The electric heating chip is formed by coating the surface of a copper strip used as a power plug with conductive hot melt glue and laying the copper strip on the surface of carbon fiber electric heating non-woven paper. According to the three-layer solid wood composite electric heating floor, the amount of adopted glue is small, the deformation degree is low, and the floor is more environmentally friendly. The electric heating chip and the copper strip are connected firmly, safety is good, and the service life is long.

The invention discloses a veneer special for a wood blade of a classical ceiling fan and a preparation method for the plywood. The preparation method comprises the following steps of: preparing materials, wherein thickness difference between a eucalyptus core veneer and a eucalyptus long-center veneer is not more than 0.3mm; assembling; hot-pressing, namely performing hot-pressing on a three-layer blank veneer subjected to cold repair; hot stacking for 24 to 72 hours to cure glue water and eliminate stress; cutting an edge, supplying putty, sanding and veneering; hot-pressing the veneered 5-layer veneer; cooling, and hot staking for 2 to 3 days; cutting an edge; performing humidifying and formaldehyde pollution resistant posttreatment; eliminating secondary stress; and performing surface treatment and wood grain filling to obtain the veneer special for the wood blade of the classical ceiling fan. The veneer special for the wood blade of the classical ceiling fan has the advantages of small deformation, high integral strength, flat and smooth surface and no torn grains.

The invention relates to a novel tumor cryoablation catheter. The novel tumor cryoablation catheter comprises a bag body and a pipe connected with the near end of the bag body, the pipe is externally wrapped with a thermal insulation layer and comprises an air inlet pipe and an air return pipe, the far end of the air inlet pipe extends into the bag body, the bag body comprises a far-end face located at the far end, in the ablation process, the air inlet pipe inputs a cold medium to strut the bag body, the far-end face is unfolded, a plane is formed at the far end of the bag body, the near-end part of the bag body bulges to be in a hemispherical shape, and the cold medium flows back through the air return pipe. According to the novel tumor cryoablation catheter, the air inlet pipe extends into the bag body, it is guaranteed that a cold source can be released sufficiently, heat exchange of the cold source is enhanced, and the freezing effect is improved; when the bag body is completely filled, the far end of the bag body is rarely quite little, it is guaranteed that the end face of the far end of the bag body is plane, point contact between a machine and tissues of the human body is avoided, the freezing range is enlarged, the freezing effect is improved, and a better effect is achieved for application of larger gross tumor volume.

The invention relates to a double-surface die inner injection moulding product and a production method thereof. The production method comprises the following steps: employing four-color printing to obtain a right side film (2) and employing Keshi color printing to obtain a back side film (3), forming a required shape through film moulding and cutting, respectively placing the right side film (2) and the back side film (3) in an injection moulding transparent engineering material (1) corresponding to an injection mould, performing nozzle cutting on an injection member after moulding, examining and packaging to obtain the right side film (2) and the back side film (3), and the transparent engineering plastics product capable of performing injection moulding of the right side film (2) and the back side film (3). The production method has the beneficial effect that pattern three-dimensional layering is stronger, no warping is generated on the products, the adhesive force between the film and the transparent plastic is large; product yield rate is increased by 20%, product deformation degree is decreased by 50%; and the production efficiency is increased.

The invention relates to the field of preparation processes of sanitary ceramics, in particular to a formula and a preparation method of sanitary ceramics, which improve the refractoriness of a greenbody and reduce the deformation degree of the green body by adjusting the raw material composition of the formula and optimizing the chemical composition. In the mineral composition of a common feldspar porcelain body, a proper amount of wollastonite raw material is introduced, the content of an anorthite crystalline phase is increased on the basis of original mullite and quartz crystalline phases, and a proper amount of closed independent pores are formed, so that the shrinkage rate and the volume density are reduced; by introducing a proper amount of the borocalcite flux, an (O = B-O-B = O)structure can be provided, the integrity and compactness of a network structure around the pores of the borocalcite flux are ensured, and the sizes of the independent pores are controlled within a certain range so as to avoid reduction of the firing strength.

The invention discloses a sintering method and apparatus for a rare earth neodymium-iron-boron magnet. The sintering method comprises the following steps specifically: (1) choosing a graphite box and a graphite cover plate with certain specifications; (2), drying the graphite box and the graphite box cover plate in a drying oven at the temperature of 60 DEG C for 8-24 hours for removing humidity; (3), uniformly paving a layer of high-temperature-resistant powder at the bottom of the graphite box; (4), putting the rare earth neodymium-iron-boron magnet products in the graphite box, and uniformly paving a layer of high-temperature-resistant powder in the contact surfaces of the products; (5), putting neodymium-iron-boron waste powder in the gaps of the graphite box; and (6), sintering the accommodated rare earth neodymium-iron-boron magnet products. The sintering method and the apparatus have the beneficial effects that the difficulties in sintering the rare earth neodymium-iron-boron magnet products with thinner thicknesses and cooling the graphite box are solved, the sintering amount of a single furnace is improved, the degree of deformation of products is effectively reduced, the material utilization is improved, the bonding of the products is prevented, the rate of finished products is improved, the oxidization of the products is reduced, and the consistence of the product performance is improved.

The invention discloses an equal-temperature hot drawing forming device and method for controlling wall thickness uniformity of a component, and relates to the field of equal-temperature hot drawing forming devices and methods by controlling the wall thickness uniformity of the component, which solves the technical problem that in an existing hot drawing technology method, bottom part reduction issevere, and thus blank deformation is nonuniform. The equal-temperature hot drawing forming device includes a hot forming press machine, a die and a gas cooler, wherein the die includes a template, afixing plate, an air inlet pipe, an air outlet pipe, a male die and a female die. The method includes the steps that 1, the die is mounted on the hot forming press machine; 2, heating is conducted, sheet materials are put into, heat insulation is conducted, cooling gas is introduced, drawing forming is conducted, and pressure maintaining is conducted; and 3, the die is opened and is cooled to a room temperature, and inspection and acceptance are conducted. According to the equal-temperature hot drawing forming device and method, circulating helium is introduced into a male die hollow structural cavity through an air passage of an upper male die to lower the temperature of the upper die, the degree of deformation of the contact part of the sheet materials and the upper male die is reduced,the thicknesses of the arc positions of the bottom parts of the sheet materials are increased, and uniform deformation of a formed part is achieved. The equal-temperature hot drawing forming device and method are used for preparing sheet material parts.

The invention discloses a bottom plate of an improved table tennis bat and the table tennis bat. The bottom plate of the improved table tennis bat adopts a special material, so that the table tennis bat is impact-resistant, ageing-resistant and better in rigidity; the bottom plate of the improved table tennis bat adopts a fish bone structure to realize the partially hollow effect of the bat bottom plate, and the whole weight of the table tennis bat is reduced; a plurality of concave holes are uniformly distributed in an elastic bottom panel and the bottom plate of the table tennis bat, the contact surface between the table tennis bat and a table tennis is enlarged by the concave hole structure, and most important, the friction and the rotating speed which are produced by the bat to the table tennis when the table tennis is hit in the table tennis sport are improved.

The invention relates to a tool for loosening bolts, especially an adjustable wrench. The high-strength anti-loosening adjustable wrench is composed of a fixed block, a sliding block, a handle and an adjusting cap. The groove matches the angle of the bolt. There is a push rod inside the handle, and the push rod is connected with the slider. The bottom of the handle is provided with an adjusting cap. The adjusting cap is provided with a bolt. The contact surface between the handle and the bolt is threaded. When rotating, the push rod will be pushed to make the slider rise, otherwise, the slider will fall. When the adjustable wrench is used, rotate the adjusting cap to make the slider rise to match the nut or bolt that needs to be loosened or tightened, and the plate wrench can be operated. , When in use, the groove on the slider and the fixed block matches the angle on the nut, so the deformation degree when the wrench and the nut are engaged is extremely small, which can prevent slipping when the force is applied. The fixed block and the bracket are integrally formed, so they can withstand greater work force.

The invention discloses a method for conducting flexibly-selective rough polishing on the surface of a polished tile, and belongs to the field of polished tile processing. Rough polishing is conducted on the surface of the polished tile through grinding heads, and the grinding heads are located over a polished tile conveyer belt. The method is characterized in that multiple grinding heads are adopted and can vertically move, the grinding heads run in a mutually independent mode and are transversely arranged to be in a straight line, and the covering width of the transversely-arranged grinding heads is larger than or equal to the width of the polished tile; after the polished tile on the conveyer belt enters a space under the grinding heads, the grinding heads are flexibly selected according to the surface condition of the polished tile to conduct rough polishing on the surface of the polished tile. According to the method, motors can be flexibly selected to be started to conduct rough polishing on the surface of the polished tile according to the condition of a polished tile blank, and the segmented polishing effect is achieved. Compared with the prior art, the defect that the tile is damaged due to the fact that the polished tile is polished by integrally adopting one hobbing cutter is avoided, and damage to the grinding knifes is avoided.

A method for forming hollow profiles is disclosed. In one exemplary method, a hollow profile is guided through a die in a processing direction and fixed by a mandrel such that at the die, the hollow profile has a material flow velocity in this processing direction (2), in which the method the mandrel has a drawing velocity in the processing direction that is greater than the material flow velocity.

The invention discloses a telescopic filter element, and a filter with a replaceable filter element. The telescopic filter element comprises a wave-shaped filter part, first edge sealing strips and second edge sealing strips are arranged on the periphery of the wave-shaped filter part, the first edge sealing strips are arranged on the two sides of the folded edge of the filter part, the second edge sealing strips are arranged on the two sides of the multi-folded edge of the filter part, and fixing pieces are further arranged on the two sides of the multi-folded edge; and the filter with the replaceable filter element comprises the filter element and a frame, the frame is formed by splicing a first frame piece and a second frame piece, the whole frame piece is of an L-shaped structure, the upper edge of the top end of the long side of the frame piece is arranged to be an inclined face, an inclined protruding strip, a hollow reinforcing rib and a protective net baffle are sequentially arranged on the inner side of the long side from top to bottom, a surface protecting net is installed between the protective net baffle and the L-shaped short edge, and the filter element is installed in the upper space of the surface protecting net. The frame body and the filter element can be separated, the frame can be reused, the filter element can be replaced regularly, and energy conservation and consumption reduction are achieved; and the filter element is telescopic and is convenient to transport and store after being compressed.

A bearing structure for a camshaft includes a bearing part that includes a cylinder head, a cam cap, and a positioning member. The cam cap is assembled to an upper part of the cylinder head. The cylinder head and the cam cap define a journal hole. The cylinder head and the cam cap rotatably support the camshaft in the journal hole. The positioning member determines the position where the cylinder head and the cam cap are assembled to each other. The positioning member is press-fitted into the cylinder head and the cam cap. In the bearing part for the camshaft, the positioning member is provided only in an inner part, which is a part of the bearing part between an axis of the camshaft and a center of an upper part of the cylinder head.

The invention discloses a production method of activated aluminum oxide micropowder and relates to the field of materials. In the production method, a tunnel kiln sintering method is adopted to produce alpha-aluminum oxide micropowder; a green brick is uniform in drying and small in deformation degree; in addition, green brick movement links are relatively small, the broken brick rate is low, andthe conditions are beneficial to keeping good working condition of a tunnel kiln and also ensuring good calcining quality; and the prepared activated aluminum oxide micropowder can be used for a lighttransmitting aluminum oxide sintered body, a carrier for a phosphor, a single crystal material, a high-grade porcelain, an artificial bone, a semiconductor, an integrated circuit substrate, an audiotape filler, a catalyst and a carrier thereof, an abrasive material, a laser material, a cutting tool and the like and particularly plays an important role in development of microelectronics and material industry. The production method has the advantages of simpleness in operation, obvious effect and the like and is suitable for large-scale popularization and application.

A linear actuator can properly drive a movable body even if a viscoelastic body is provided between the movable body and a fixed body. For example, a linear actuator 1 includes a fixed body 2, a movable body 6, a magnetic drive mechanism 5 configured to linearly drive the movable body 6 with respect to the fixed body 2, and a viscoelastic body 9 made of a silicone gel or the like where the viscoelastic body 9 is arranged between the fixed body 2 and the movable body 6. In a case 3 of the fixed body 2 and a first yoke 7 of the movable body 6, the viscoelastic body 9 is arranged between a fixed body side flat surface unit (such as a first fixed plate 331 and a second fixed plate 332) facing parallel to a first direction and a second direction Y orthogonal to a drive direction Z by the magnetic drive mechanism 5 and a movable body side flat surface unit (such as a first side plate unit 76 and a second side plate unit 77). Therefore, when the movable body 6 is driven, the movable body 6 undergoes shear deformation.