46results about How to "Reduce stress and strain" patented technology

The invention discloses a designing method for realizing the equal load-carrying of a tension-loaded butt joint with a central crack on a welding line, and the application of a K factor, which belong to the field of welding and aim to solve the problem that the load-carrying capacity of the tension-loaded butt joint with the central crack is lower than that of a parent metal. If the parent metal of the tension-loaded joint with the central crack on the welding line also has a crack, the designing method comprises the following steps of: determining equal load-carrying conditions, and the fracture toughness of a weld metal and the parent metal; calculating a stress intensity factor of a parent metal area and the stress intensity factor of a welding line area meeting equal load-carrying; calculating a stress intensity factor formula; and obtaining geometrical parameter values of the welding line. If the parent metal of the tension-loaded joint with the central crack on the welding line is free from defect, the designing method comprises the following steps of: determining the equal load-carrying conditions, and the tensile strength of the parent metal; calculating the stress intensity factor formula; determining a critical stress relational expression, and the fracture toughness of the weld metal; and obtaining the geometrical parameter values of the welding line. The stress intensity factor of the welding line area is applied to the calculation of critical crack size, critical stress and remaining service life of the tension-loaded joint with the central crack. The method and the application are applied to plate butt joints welded on both sides.

The invention relates to the technical field of metallurgy steelmaking sheet billet continuous casting, in particular to a method of preventing transverse corner cracks of a microalloyed steel continuous casting sheet billet. After the method is applied in a ladle furnace smelting technology and a continuous casting technology, the mass percent of Ti in microalloyed steel is controlled at 0.018-0.025%, and a specific water flow of secondary cooling water of a continuous casting machine is adjusted to 0.42L/kg. According to the method, the problem of the transverse corner cracks of microalloyed steel continuous casting sheet billet is mainly solved by adopting a technological means; through molten steel micro-Ti treatment, the grain boundary precipitation of NbN and VN in the microalloyed steel and the grain boundary strength are reduced and weakened, a third high-temperature brittleness area of steel is avoided from a cooling procedure, and the stress strain of corners of the casting billet during straightening is reduced; no additional equipment transformation or investment is required; no strict requirement is made on whether electromagnetic stirring equipment is equipped; and the method is low in investment and wide in application range, and has few restrictions.

The invention discloses a flexible hinge and floating frame matched clamping and positioning device for an optical component. A flexible hinge and a floating frame are matched to be used for clamping and positioning the optical component, so that a large-caliber optical component is provided with the low-stress-strain reliable clamping capacity in the horizontal plane, moreover, the floating frame and two-dimensional large stroke are in flexible connection, so that the parallelism between the optical element surface and the work table plane is guaranteed. The flexible hinge is fixedly connected with a crystal frame, connection lugs are fixed on the crystal frame, positioning blocks are fixed in the crystal frame, and the optical component is disposed in the crystal frame integrally and positioned through the positioning blocks. Locking blocks are fixed in the crystal frame, first positioning screws are screwed in the locking blocks, and the optical component is pre-clamped and fixed between the first positioning screws and the positioning blocks. Compression blocks are fixedly connected with the crystal frame, and the optical component is compressed and fixed vertically through the compression blocks. Spherical hinge studs are fixedly connected with connection lugs and are in contact with air floating pads. The device is used for clamping and positioning of optical elements during micro-defect rapid searching and repairing.

A heat sink has a first flat plate, a partition plate, and a second flat plate. The first flat plate has an upper surface in which a first recess is formed. The second flat plate has a lower surface in which a second recess is formed, and an upper surface on which a semiconductor laser element is mounted. These recesses form a part of a refrigerant channel. The partition plate has a lower surface covering the first recess, an upper surface covering the second recess, and at least one through hole having the first recess communicated with the second recess. The first flat plate and the second flat plate both have a first coefficient of thermal expansion. The partition plate has a second coefficient of thermal expansion lower than the first coefficient of thermal expansion.

An electrically driven entryway activation system for opening and closing two spaced swinging doors hung on spaced rotating parallel door posts comprises a base plate extending between the door posts. Levers attached to each door post rotate in a plane parallel to the base plate. A low profile actuation system spaced between the levers comprises a center post, a sector gear journaled on the center post for rotation parallel to the base plate, and a low profile gearmotor mounted between the base plate and the sector gear. A low profile emergency manual mechanism is provided for unclutching the output pinion gear of the gearmotor.

A flexible rotary hinge based on four-link mechanisms is formed in such a way that an inner ring and an outer ring are connected with each other through the uniformly distributed four-link mechanisms and are connected with an outer ring support frame. In each four-link mechanism, one end of each side link is connected with the inner wall of the outer ring, the other ends of the side links are connected with rigid links, and the other ends of the rigid links are connected with the inner ring, so that a four-link rotation magnification structure is formed. The flexible rotary hinge provided by the invention is a flexible rotary hinge based on driving of the four-link rotation magnification mechanisms, has the characteristics of large travel and high precision and is suitable for a large-travel precise control mechanism.

The invention relates to a reinforcing method of an orthotropic steel box girder bridge deck slab. The reinforcing method is characterized by including the following operation steps that (1) derusting is performed; (2) a steel box girder top plate is detected; (3) an anti-corrosion layer is sprayed; (4) shear nails are welded; (5) a reinforcing mesh is mounted; (6) a high-tenacity concrete layer is poured; (7) high-temperature steam curing is performed; (8) coating with a water-proof bonding layer is performed; and (9) an asphalt layer is laid. The reinforcing method of the orthotropic steel box girder bridge deck slab is scientific and reasonable in design; the flexural rigidity of the orthotropic steel box girder bridge deck slab is improved, the stress strain of the orthotropic steel box girder bridge deck slab is effectively reduced, and the cracking risk is reduced; and the stability of the whole structure is improved, the cooperative stress of the whole structure after reinforcing is ensured, and the driving comfort and the braking performance are improved.

The invention discloses an armored cable preheated-type cold rotary forging device and a forging method thereof. The forging device comprises a reducing rotary forging machine which is provided with a clamping and feeding device; a cylindrical temperature controllable heater is arranged between a host machine of the reducing rotary forging machine and the clamping and feeding device. The method for carrying out armored cable preheated-type cold rotary forging by utilizing the armored cable preheated-type cold rotary forging device comprises the following steps of: a) straightening; b) clamping; c) feeding; d) heating; and e) rotary forging. According to the invention, the springback quantity of materials in the rotary forging process can be reduced obviously; and by preheating a work piece continuously in the rotary forging process, the stress strain of a work piece inner region is reduced and the plastic deformation capability of work piece materials is improved. A result shows that when the armored cable rotary forging is carried out by adopting the rotary forging technology, the springback quantity of the materials is reduced by 50% in the rotary forging process, the finishing size of the rotary forging piece is ensured, and the tolerance grade of the rotary forging piece is improved effectively.

The invention relates to a truck tyre, in particular to a truck tyre with groove bottom crack resistance. According to the truck tyre with groove bottom crack resistance, a tyre crown part of the tyrecomprises a tread, a first belted layer, a second belted layer, a third belted layer, two zero-degree belted layers, a tyre body and a rubber tyre shoulder pad; at least three pattern grooves are formed on the surface of the tread; the tyre shoulder pad is arranged between the belted layers and the tyre body; the tyre crown part also comprises a tyre body rubber sheet; the tyre body rubber sheetis arranged between the tyre body and the rubber tyre shoulder pad; the distance b between the endpoint of the first belted layer and the inner endpoint of the rubber tyre shoulder pad is 5 to 10 mm;the distance c between the inner endpoint of the rubber tyre shoulder pad and the endpoint of the tyre body rubber sheet is 5 to 10 mm; the edge covering rubber of the first belted layer is 24 to 28 mm in width and 0.5 to 0.8 mm in thickness; and the tyre body rubber sheet is 100 to 110 mm in width and 0.5 to 0.8 mm in thickness. From the angle of the tyre structure design, the tear resistance ofthe tyre groove bottom is improved and the service life of the tyre is prolonged.

The invention particularly relates to a preparation method of an aluminum-doped zinc oxide transparent conductive film. Compared with the prior art, Ga-doped sol A is not prone to acting with components in air during heat treatment so that the sol A can grow a transparent and uniform thin film layer on a substrate as a buffer layer of an aluminum-doped zinc oxide thin film layer, the transparencyis high, and in the thin film doped with Ga, the lattice constant of crystal is closer to the lattice constant of wurtzite ZnO, thus the lattice mismatch effect is effectively reduced and a good lattice buffering effect is achieved, and the aluminum-doped zinc oxide transparent conductive film with better photoelectric performance is prepared.

The invention discloses a packaging structure for packaging an OLED device. The packaging structure comprises a packaging unit. The packaging unit comprises an optical adhesive layer; an inorganic packaging layer arranged on the optical adhesive layer; and an organic packaging layer arranged on the inorganic packaging layer. According to the invention, the optical adhesive layer is introduced intothe packaging structure. The stress strain of the inorganic packaging layer during bending is reduced, so that the cracking risk of the inorganic packaging layer is reduced. In addition, compared with the prior art, the packaging structure provided by the invention saves a barrier layer on the outermost layer of the structure. Therefore, the thickness of the packaging structure can be reduced, and the equipment thinning development can be facilitated.

The invention provides a scroll compressor and an air conditioner with the same. The scroll compressor comprises a static scroll disc, at least one pipeline piece and at least one vibration isolationstructure, wherein the at least one pipeline piece is connected with the static scroll disc through the vibration isolation structure. The scroll compressor effectively solves the problem of influenceon the reliability of an air conditioning system pipeline due to overproof stress strain of the air conditioning system pipeline caused by direct transfer of vibration of the static scroll disc to anair sucking pipe or an enthalpy adding pipe in the prior art.

The invention provides a silencer and an air conditioner comprising the same. The silencer comprises a barrel body, an air inlet connecting pipe and an air outlet connecting pipe, wherein the interior of the barrel body is wholly through, a barrel body part is arranged in the middle, an air inlet and an air outlet are formed in two ends respectively, and sectional areas of the air inlet and the air outlet are smaller than the sectional area of an inner cavity of the barrel body part; the sectional area of the air inlet connecting pipe is smaller than that of the inner cavity of the barrel body part, and the air inlet connecting pipe is connected with the air inlet; the sectional area of the air outlet connecting pipe is smaller than that of the inner cavity of the barrel body part, and the air outlet connecting pipe is connected with the air outlet; and the barrel body is made of an elastic material. According to the silencer and the air conditioner comprising the same, the elastic material such as composite rubber or plastic and the like is adopted to prepare the barrel body, so that not only is the cost reduced, but also the barrel body has great elasticity and a buffer performance, and then the silencer can perform an effect of eliminating noise, and can reduce stress strain of a pipeline and pipeline vibration of the device, as well as noise caused by vibration.

The invention relates to the technical field of flexible screens, and provides a flexible screen attaching jig and a flexible screen attaching method. The attaching jig comprises a carrying table, wherein the carrying table comprises a first attaching plate, a second attaching plate, an angle adjusting mechanism and a flattening plate assembly; the first attaching plate is provided with a first attaching surface; the second attaching plate is provided with a second attaching surface, and the second attaching surface and the first attaching surface are coplanar or form a preset included angle;the angle adjusting mechanism is connected between the first attaching plate and the second attaching plate; the flattening plate assembly is arranged on the first attaching face, the angle adjustingmechanism and the second attaching face. The angle adjusting mechanism is used for adjusting the included angle between the first attaching face and the second attaching face, so that the flattening plate assembly forms an arc face, and the radius and the arc length of the arc face are changed. By means of the attaching jig, the stress strain of the flexible screen in the limit state is reduced, arc surfaces with various radiuses and arc lengths can be formed when the flexible screen is attached through one attaching jig, frequent replacement of the attaching jig is not needed, and manpower and material resources are saved.

The invention discloses an auxiliary suction pipe, a suction structure, a household appliance and a dehumidifier for lowering noise produced by the auxiliary suction pipe and relates to the field of household appliances. The auxiliary suction pipe comprises a first suction pipe and a connecting pipe, one end of the connecting pipe is communicated with the other end of the first suction pipe, and the ratio between the outer diameter of the first suction pipe and the outer diameter of the connecting pipe is less than 63%. Different form the existing auxiliary suction pipe formed by pipes with the outer diameter more than 63% of the size of the connecting pipe, the auxiliary suction pipe applies the first suction pipe with small outer diameter, noise caused by vibration of the pipe is lowered by the aid of flexibility of the pipe, and noise of the complete appliance is lowered to the uttermost degree; meanwhile, pipe stress is released better, and stress-strain is lowered.

The invention discloses a thick slab corner crack control process, which relates to the technical field of steel production, and comprises the following steps: comprehensively optimizing steel microalloy element components, selecting casting powder with proper alkalinity and viscosity, adjusting the cooling system of a crystallizer, optimizing secondary cooling strength, optimizing the vibration parameter and taper of the crystallizer, and improving the precision control of casting machine equipment, or measures such as a chamfering crystallizer and a surface structure control SSC technology are adopted, so that the occurrence of transverse cracks at the corners of a casting blank can be effectively controlled.

The invention discloses a rear drive transmission shaft supporting piece of an integrated bidirectionally-vulcanized structure. The rear drive transmission shaft supporting piece of the integrated bidirectionally-vulcanized structure comprises a middle supporting installation support, a middle supporting bearing and middle supporting main springs. The two middle supporting main springs are in the same shape and are symmetrically arranged, each middle supporting main spring is of a rotary body structure, and the radial section of each middle supporting main spring is of a C-shaped structure. Each middle supporting main spring comprises an edge side and a bent side. The edge sides of the two middle supporting main springs are arranged oppositely. An inner side portion and an outer side portion which are both of an annular structure are arranged between the edge side and the bent side of each middle supporting main spring. Connecting portions used for connecting the inner side portions with the outer side portions are arranged on the bent sides of the middle supporting main springs. Radial protrusions of annular structures are arranged on the edge sides of the inner side portions towards the outer side portions. The rear drive transmission shaft supporting piece of the integrated bidirectionally-vulcanized structure can overcome the defects of the prior art and meet actual use requirements. The invention further discloses a machining method of the rear drive transmission shaft supporting piece of the integrated bidirectionally-vulcanized structure.

A display panel support frame and a display panel are provided. The display panel support frame includes a first support frame, a second support frame, a third support frame, and a plurality of connecting members. The support plate on the first support frame and the second support frame may be relatively displaced from the third support frame through the connecting member of a linking member, thereby reducing the tensile or compressive stress of the non-bending area of the screen.

The invention discloses a split type liquid rubber composite joint with a low diameter-axial ratio and an adjusting method, the split type liquid rubber composite joint comprises a core shaft, a rubber body, vulcanizing body outer sleeves, a stop block and an integral outer sleeve, the vulcanizing body outer sleeves are split type outer sleeves, a gap is formed between every two adjacent vulcanizing body outer sleeves, the rubber body is vulcanized between the vulcanizing body outer sleeves and the core shaft, a gap between the vulcanizing body outer sleeves extends into the rubber body; a hydraulic cavity with an opening in the outer side is defined by the mandrel, the rubber body and the vulcanizing body outer sleeve, a stop block is arranged in the hydraulic cavity and covers the vulcanizing body outer sleeve, and the outer sides of the stop block and the vulcanizing body outer sleeve are sleeved with an integral outer sleeve. The mandrel is provided with a concave pit which is concave towards the inner side of the mandrel, bosses are arranged on the two sides of the concave pit, the inner side of the stopping block is embedded in the concave pit of the mandrel, and when the stopping block and the mandrel move relatively in the axial direction, the bosses of the mandrel can stop the axial movement of the stopping block. Abrasion of a wheel track can be reduced, meanwhile, large axial rigidity is provided, and the running stability of a vehicle is guaranteed.

The invention discloses an electroplated diamond wire saw, diamond wire abrasive particles and a preparation method of the diamond wire abrasive particles, and the preparation method of the diamond wire abrasive particles comprises the following steps: carrying out thermal reaction treatment on diamond micro-powder to obtain the diamond micro-powder with roughened surface and structure defects; uniformly mixing the diamond micro-powder with the roughened surface and the structure defects with oxide ceramic powder to obtain mixed powder; and the mixed powder is placed in a vacuum environment to be sintered, and the diamond wire abrasive particles are obtained. According to the method, diamond micro-powder is sequentially subjected to thermal reaction treatment, physical mixing treatment with oxide ceramic powder and sintering treatment, the diamond wire abrasive particles are obtained, the self-sharpening performance of the diamond abrasive particles is improved, and the holding strength of a plating layer on the diamond abrasive particles is improved; the cutting efficiency, the machining effect and the service life of the electroplated diamond fretsaw are further improved. The invention further provides the electroplated diamond fretsaw comprising the base wire, the electroplated layer and the diamond wire abrasive particles embedded in the electroplated layer.

The invention provides a composite resin concrete steel bridge deck pavement structure and a construction method thereof. The steel bridge deck pavement structure comprises a steel bridge deck slab, a resin waterproof bonding layer and a resin concrete layer. A reinforcing layer is laid in the resin concrete layer. The reinforcing layer is a reinforcing mesh, and/or a fiber material, and/or gravel particles. According to the technical scheme provided by the invention, the reinforcing layer is additionally arranged in the resin concrete, so that the overall strength is improved; meanwhile, the steel bridge deck slab and the resin concrete layer are connected through the resin waterproof bonding layer, so that the bonding strength of the steel bridge deck slab and the resin concrete layer is higher, and the shear resistance of the steel bridge deck slab and the resin concrete layer is remarkably improved.