442results about How to "Address stress" patented technology

The invention relates to a vascular recanalization system for cardiovascular stenosis lesions. The vascular recanalization system comprises a balloon, an energy generation controller and a catheter. The catheter comprises a main body tube, one end of the catheter is connected with the energy generation controller, and the main body tube at the other end of the catheter is connected with one end ofthe balloon; wherein the balloon mainly comprises a balloon main body, an inner tube and an electrode pair, and the inner tube is arranged in the balloon main body; and the energy generation controller can send out and regulate a vibration signal with a specific frequency to enable the electrode pair to generate a vibration wave. The system further has a drug delivery function, can inhibit increase of endovascular membranes after recanalization and avoid restenosis after recanalization, thereby achieving the function of long-term treatment of stenotic lesions. For many vascular diseases needing to be implanted with stents, the purpose of achieving long-term patency rate without stent implantation is achieved, and therefore real intervention implantation-free is achieved.

The present invention discloses a GaN device based on component-gradual-changed GaN MISFET and its processing method. The device includes substrate (1), buffer layer (2), intrinsic GaN layer (3), AlN isolating layer (4) and source (7), drain (8), gate (9), in which component-gradual-changed AlGaN layer (5) and AlN cap layer (6) are orderly set on the AlN isolating layer. The process of the device includes: the GaN or AlN buffer layer are orderly extended on sapphire or silicon carbide substrate; the intrinsic GaN layer is deposited; the AlN isolating layer is deposited; the component-gradual-changed AlGaN is deposited; the AlN cap layer is deposited; two sides of the AlN cap layer on top and parts of two sides of component-gradual-changed AlGaN layer are separately etched to form a step structure which is high in central and low in two sides; ohmic contacts of the source and the drain and metal contact of the gate are separately made on different steps of the structure. The present invention has low drain current and high gate voltage, and can be used to process high power microwave devices.

The invention discloses a material breakage constraint-based continuum structure topology design modeling and optimization design method, which is used for solving (a) problems of stress concentration and singularity, and (b) a problem of maximum stress fluctuation and a problem of high analyzed and calculated quantity in different degrees in the prior art. In the method, effective stress constraint relaxation is adopted to treat the phenomenon of stress singularity. In the process of optimizing problem approximation modeling, a q1 norm metrical function of the structural stress serves as a penalty function, all unit stress constraints are replaced by q2 norm metrical function constraint of the structural stress, the most potential active unit stress constraints and the introduced volume constraints, and the local stress level is controlled by combining variable constraint limit. The optimization process of the method is divided into two optimization stages and a conversion stage, and the design space is automatically expanded and reduced. A quadratic programming method is utilized to solve each stage, a pure optimized structural topology in black/white distribution can be obtained, and the method has high optimization design efficiency.

The invention discloses a preparation method of a wall thickness controllable directional solidification casting mould. The preparation method comprises the steps of: firstly, designing an initial casting mould in three-dimensional software; then, placing the initial casting mould into casting software to finish stress calculation, and determining the optimal casting mould wall thickness; next, placing a secondary casting mould into a directional crystal growth simulation environment to carry out radiative heat transfer calculation, analyzing a temperature field distribution rule and a thermal field change rule, changing the wall thickness and giving a wall thickness close to a directional solidification growth temperature gradient rule; repeating the radiative heat transfer calculation and stress check, and revising the design until the final three-dimensional design of the casting mould is determined; and manufacturing the casting mould based on a rapid manufacturing method for a rapidly-molded ceramic casting mould. The method is used for solving the problem that the casting mould affects the growth of a directional crystal in the direction solidification process of a complex high-temperature alloy structure, thus a directional crystal blade can be more easily obtained, higher-quality directional crystal products can be obtained, and problems such as crack and stress deformation caused by hot stress and other stresses are avoided to a certain extent.

The invention relates to an integral equipment bay which comprises a framework, a bottom plate, an end plate and an apron board, wherein the bottom plate, the end plate and the apron board are all fixedly arranged on the framework; the framework consists of an upper edge beam, a lower edge beam, multiple cross beams, multiple camber beams arranged between the upper edge beam and the lower edge beam, and end part brackets arranged at two ends; the upper edge beam and the lower edge beam are arranged along the vehicle length direction, and the multiple cross beams are arranged along the vehicle width direction; the upper edge beam, the camber beams, the lower edge beam, the cross beams and the end part brackets are fixedly connected with one another by virtue of fastening pieces; the upper edge beam is fixedly arranged on a vehicle body edge body by virtue of a fastening piece. <0}{0><}0{>According to the integral equipment bay, an overall equipment bay module can be preassembled by virtue of toolings offline; during entrucking, the overall equipment bay module is connected with the vehicle body edge beam, so that the entire car assembling table bit occupation time is shortened, and the entire car assembly efficiency and the equipment bay commercialization degree are greatly improved.

The invention relates to a vibratory stress relief apparatus for medium frequency and low frequency shaft type parts, and a use method thereof. The apparatus comprises a vibration exciter, a support block for clamping and supporting a workpiece, and a support mechanism connected with the support block. The support mechanism comprises a pair of support frames comprising a left support frame and a right support frame, and a support seat for installing the left support frame and the right support frame, wherein the left support frame and the right support frame right are arranged relatively. Thesupport block respectively forms rotatable connections with the left support frame of the support mechanism and the right support frame of the support mechanism. The apparatus further comprises a vibration exciter base for installing the vibration exciter, wherein the vibration exciter base is arranged on the middle portion of the workpiece, the vibration exciter, the vibration exciter base and the workpiece synchronously vibrate during vibratory stress relief. According to the present invention, a simply supported beam form is adopted, the flexural vibration type primary resonance is generated by the shaft type parts under the excitation of the vibration exciter at the natural frequency adopted for shaft flexural vibration; in the prior art, the dynamic stress generated by the apparatus does not reach the requirement of residual stress decreasing, with the apparatus provided by the present invention, the problem in the prior art is solved; the deformation amounts on both ends of the shaft are substantially improved; the dynamic stress distribution of the shaft is uniform so as to effectively reduce the residual stress of the shaft part.

The alkaline water-base cutting liquid for silicon wafer and other semiconductor material consists of polyglycol of molecular weight 200-1000 in 30-90 weight portions, pH regulator 9-30 weight portions, chelating agent 1-10 weight portions and deionized water for the rest. The present invention has the beneficial effects of homogeneous stable chemical splitting effect coexisting with the mechanical effect, less stress, lowered damage of the semiconductor material, raised chip cutting efficiency and quality, simple post-treatment, and avoiding the chemical bonding and adsorption on the surface of silicon wafer.

The invention discloses a device and a method for degumming in SMT (surface mounting technology) industry, which are used for removing a coating layer on a PCB (printed circuit board) board. The device comprises an optical system, a platform motion system, a CCD (charge coupled device) visual positioning system and a control system, wherein the optical system is used for performing the alignment transmission on CO2 (carbon dioxide) lasers and finally focusing on material surface and is used for walking along the laser track within the region through optical scanning; the control system is used for controlling the optical system, the platform motion system and the CCD visual positioning system; the platform motion system is used for performing the laser spanned degumming process through the matching motions of a numerical control platform along X and Y directions; the PCB board is arranged on the numerical control platform of the platform motion system; and the optical system is arranged above the numerical control platform of the platform motion system. By using the method and device provided by the invention, the defects of mechanical degumming, such as the influence of the mechanical degumming on the quality of the product, are avoided, the stress problem of the mechanical degumming is solved and the better degumming effect is achieved.

The present invention discloses a welded member fatigue stress and strain real-time non-contact type monitoring method. According to the method, the welded member welding seam and a certain surrounding area are subjected to grid division with a certain interval, each grid intersection point is adopted as an infinitesimal body as the stress and strain analysis unit, the feature information of the pixel points of all infinitesimal bodies in the area to be measured during the fatigue load acting process are extracted through a machine vision monitoring system when the fatigue load acts on the member, the collected member image is subjected to pixel point matching, the relation between the stress and strain change law and the image feature is established so as to obtain the feature change of the infinitesimal body during the fatigue load acting process, and finally the strain value and stress distribution law and the stress strain evolution law during the fatigue process are obtained. The method of the present invention is used for solving the monitoring problem of the stress and strain status distribution and evolution law of the welded member in the steel structure under the fatigue load acting.

The invention discloses a silicone master batch with long-lasting scratch resistance, and a preparation method thereof. The raw materials of the master batch contain modified silicone, the modified silicone is an active group-containing long side chain-grafted high molecular weight polysiloxane, and the raw materials also contain polypropylene, a reinforcing agent, an anti-aging agent and other assistants. The raw materials are internally mixed at 200-220 DEG C, and then are extruded and granulated under certain conditions by a twin-screw extruder to obtain the silicone master batch with long-lasting scratch resistance. The silicone master batch prepared by the invention contains the active group-containing long side chain-grafted high molecular weight polysiloxane, so the problems of unabiding scratch resistance and stress whitening of common silicone are well solved, the plastic processing performance is improved, and the device wearing is reduced. The preparation method of the invention has the advantages of simple process, environmental protection, safety, good repeatability, and easiness in industrialization. The silicone masterbatch prepared in the invention is mainly used for preparing a scratch-resistant automotive interior polypropylene composite material.

A solid rocket engine with a high thrust ratio comprises a combustion chamber shell. A heat insulated layer is pasted to the inner surface of the combustion chamber shell. A heat insulated sleeve is bonded to the outer surface of a grain and forms a whole with the grain. The grain with the heat insulated sleeve is arranged in the combustion chamber shell with the heat insulated layer in a free-filling mode. A spray pipe is arranged at the outlet end of the combustion chamber shell. The grain comprises a booster-stage three-arm type grain body and a cruising-stage end-burning grain body which are connected in series to form the integrated grain. The booster-stage three-arm type grain body and the cruising-stage end-burning grain body are grain bodies for four-component hydroxy-terminated polyb propellants of the same formula. By means of the solid rocket engine with the high thrust ratio and a manufacturing method thereof, the problem of a small thrust ratio can be solved, the high thrust ratio can be provided, working is table, and the structure and performance are reliable.

A linear cutting liquid for semiconductor material is prepared from polyethanediol 10-10000, amine soda, penetrant, ether-alcohol as activating agent, chelating agent and deionized water. Its advantages are less corrosion to cutting wire, no filings deposit on the surface of Si chip, high penetrating, lubricating and cooling effect and low cost.

The invention discloses a self-adaption laser shot blasting shape correcting device based on a large data platform and a method. The method comprises the following steps: (1) surface curvature data of a calibrated workpiece and a workpiece needing to be corrected the shape is input to respectively build three-dimensional curvature models; (2) an optimal shape correcting scheme is calculated through a laser shot blasting shape correcting large data platform in a self-adaption manner; (3) the shapes of the workpieces are corrected according to the optimal shape correcting scheme; the surface curvature detection is performed for the shape-corrected workpieces through a three-dimensional shape measurer; and data is input in the large data platform; and (4) the shape correcting effect is estimated through the large data platform to determine if secondary shape correction is needed; and if so, the steps (1-3) are repeated until the final machining requirements are reached, so that the self-adaption laser shot blasting shape correction of the workpieces is realized.

The invention relates to a flexible display module. The flexible display module is provided with a bent zone and an extending zone located at the end of the flexible display module. The flexible display module comprises a first superposed layer and a second superposed layer which are superposed, and the first superposed layer and the second superposed layer are non-fixedly connected in at least part of bent zone and are fixedly connected in the extending zone. On one hand, the first superposed layer and the second superposed layer are non-fixedly connected in the bent zone, so that when the flexible display module is bent, the first superposed layer and the second superposed layer can be freely bent in the bent zone, and the stress problem caused by a bonding material to the two superposedlayers during traditional bending is avoided; on the other hand, the first superposed layer and the second superposed layer are fixedly connected in the extending zone, and relative slippage of the superposed layers during bending is avoided. The whole flexible display module is not likely damaged in the bending process.

The invention discloses a perforation cartridge case manufacturing process which comprises the following steps of (1) medium frequency heating: performing the medium frequency heating on round steel with a medium frequency furnace, and heating the round steel to 1150 DEG C to 1200 DEG C, (2) round steel blanking, (3) cake upsetting: allowing the middle of the head of the round steel to form a spherical concave, (4) stamping forming: keeping the stamping temperature higher than 1100 DEG C, and ensuring that the final forging temperature is higher than 850 DEG C, (5) normalizing, (6) cold pressing, (7) shape finish turning, (8) groove milling, and (9) oil stain and burr removal, and surface electroplating. The perforation cartridge case manufacturing process effectively solves the technical problems of nonuniform heating, high stamping rejection rate, and greater internal stress of a perforation cartridge case material.

The invention discloses a test apparatus and method for simulating the hydraulic fracture of concrete under a high water pressure. The apparatus comprises a concrete sample, a water pressure supply system and a data acquisition system, the concrete is provided with a crack in advance, and the water pressure supply system comprises an electrically controlled pressure pump. The method comprises the following steps: 1, making a die; 2, pouring the sample; 3, carrying out demolding curing; 4, loading the sample; and 5, testing: introducing water into the crack through the electrically controlled pressure pump, and gradually improving the water pressure until the concrete sample is destroyed; and 6, analyzing the hydraulic fracture: replacing the concrete sample, repeating step 4 and step 5, and analyzing the phenomenon and the mechanism of the hydraulic fracture of the concrete sample according to a result obtained after several tests. The water pressure and deformation parameters are fast to acquire.

The invention relates to a wide-temperature range thermoelectric generation device with a multi-segmented structure and a preparation method thereof. The thermoelectric generation device is formed bycombining at least two types of thermoelectric materials with excellent thermoelectric properties in different temperature zones along the temperature gradient direction; high-temperature terminal electrodes and low-temperature terminal electrodes are used for being connected with P-type single thermoelectric elements and N-type single thermoelectric elements in a diversion manner; and barrier layers and connection layers are arranged between the high-temperature terminal electrodes or the low-temperature terminal electrodes and the corresponding single thermoelectric elements and between thesingle thermoelectric elements of two adjacent temperature segments. According to the wide-temperature range thermoelectric generation device with the multi-segmented structure and the preparation method thereof, maximization of the energy conversion efficiency of the whole temperature zone can be achieved, and the reliability of the thermoelectric generation device is high.

The invention discloses a small-section square girder and welding process thereof, belonging to welding technology and capable of solving the problem of low welding quality in case of small manual welding space. The small-section square girder has four girder plates with widths of 200-220mm and lengths smaller than or equal to 10m in paired arrangement to form a box-shaped inner cavity, in which are arranged reinforcement rib plates, flanges are welded at two ends of the girder plates, and inside and outside fillets are present between the girder plates and between the girder plates and the flanges. In welding, a to-be-welded part is cleaned before welding, a run-on plate and a run-off plate are assembled and welded, welding is carried out by use of an automatic welding cart, an inner cavity and an exposed welding seam alternate welding sequence is adopted during welding, an inner cavity backing welding seam is firstly formed, the backing welding seam for an exposed welding seam is then formed after the back gouging is strictly performed, the inner cavity and the exposed welding seam are sequentially formed, and a back-step welding method is adopted. According to the invention, welding deformation is controlled within an allowable range, torsion resistance and shearing resistance of the small-section square girder are improved, and stability and reliability of the girder are ensured.

The invention provides a three-dimensional memory device and a forming method thereof. A memory unit is bonded with a control unit, and then another memory unit is bonded on the back surface of a substrate of the control unit, so that bonding of at least three units is realized. Therefore, wafer-level bonding is realized, the process is simpler, the stress problem can be effectively solved while the number of storage layers is increased, the structure is more stable, and the risk of structural collapse is reduced. After the memory unit and the control unit are bonded, the bonding pads on the two sides are led out, the bonding pads can be led out from the sides of the two memory units, the bonding pads can also be led out from the two sides of one memory unit and the two sides of the control unit, and a control circuit of the control unit is used for controlling the memory unit accessed during memory. The pad leading-out mode is added, and the number of bonding pads per unit area is increased. The number of bonding pads per unit area is increased, the access hit rate of the memory unit can be improved, and therefore the memory period of the memory unit can be greatly shortened.

The invention relates to a water-cooling closed-loop control technological method and control system of stick materials. The water-cooling closed-loop control technological method of stick materials comprises the following steps of collecting temperature information before finish rolling and after finish rolling of the stick materials; and according to through water cooling and a temperature feedback closed-loop regulating method, performing accurate rolling control and cooling control in the stick material rolling and reinforcing bar splitting rolling process. Through the adoption of the stick material water-cooling closed-loop control technological method disclosed by the invention, the stability of rolling control temperature and the stability of the cooling control technology can be realized, and the alloy usage quantity of the stick materials is reduced; the problems that the water cooling black circle tissue is generated on the surfaces of the stick materials and core surface hardness is poor caused by through water cooling are solved; and increasing the production benefits of a steel mill is facilitated. The method disclosed by the invention provides a technical thought foraccurately controlling a cooling technology for cooling the special steel stick materials including gears and the like after rolling, the problems of coarse crystal grains and cracking during cold shearing caused by unstable cooling technology of the special steel stick materials after rolling can be solved; and under the premise that the production cost of the stick materials of the steel mill isreduced, improving the product quality is facilitated, and the smooth operation of the production is promoted.

The invention discloses a stud welding mixed connection node of a rectangular concrete filled steel tubular column and an H-shaped steel girder. The H-shaped steel girder comprises an upper flange, a web and a lower flange, wherein the upper flange, the web and the lower flange are formed together. The rectangular concrete filled steel tubular column comprises an upper steel tube and a lower steel tube which are vertically arranged adjacently. The node comprises an inner separating board welded to the bottom in the upper steel tube, a through separating board welded to the bottom end of the upper steel tube and a vertical connecting board welded to the side of the bottom of the upper steel tube. The top end of the lower steel tube is welded to the lower surface of the through separating board. The upper flange is opposite to the inner separating board and welded to the upper steel tube. The web is connected with the vertical connecting board through high strength bolts. The lower flange is fixedly connected with the through separating board. According to the node, stud welding mixed connection is adopted, the node can be fast installed in the position in a field, a construction period can be obviously shortened, and the assembly process is facilitated. Meanwhile, due to the arrangement of the through separating board, a girder-end plastic hinge is moved outwards, the steel girder is damaged before the node, and safety of the node is guaranteed.

The invention relates to an automatic-deviation-rectification, constant-speed and constant-tension rewinding machine. A magnetic powder brake and a cantilever unwinding inflation shaft are mounted on a rack; an unwinding membrane passes through an unwinding force sensor roll and an unwinding guide roll, and is delivered into a membrane processing device to form an unwinding tension control device; a screw rod sliding table and a stepping motor are fixed on the rack; a variable frequency motor, a magnetic powder clutch and a cantilever winding inflation shaft are fixed on the surface of the screw rod sliding table; a winding membrane sequentially passes through a photoelectric position sensor, a winding force sensor roll and an encoder roll, and finally passes into the membrane processing device to form a device for controlling winding tension, winding speed, deviation rectification and the like; and an unwinding force, winding force and deviation rectification controller with a program-controlled preset value is utilized to control constant tension of the membrane, and to rectify deviation automatically. The programmable logic controller (PLC), a frequency converter and the variable frequency motor are arranged to control the transmission of the membrane at the constant speed. The machine achieves multifunctional control, solves the problems of high stress deformation, non-uniform viscosity, the deviation and the like, is high in quality and efficiency, simple, reasonable in design, and convenient to operate and maintain, and is particularly applicable to rewinding of a polytetrafluoroethylene adhesive tape coil.