113results about How to "Avoid uneven stress" patented technology

The invention relates to a preparation method of a titanium alloy spring made of a wire with a specially-shaped section and belongs to the technical field of springs. The spring is formed by winding of the titanium alloy wire with the specially-shaped section; the titanium alloy wire comprises the components in percentage by mass as follows: 2-4 of Al, 6-10 of V, 4-8 of Cr, 2-6 of Mo, 2-6 of Zr, 0.1-0.3 of Fe, 0.03-0.15 of Si and the balance of Ti. The section of the titanium alloy spring wire can be rectangular, square, orthohexagonal or oval. The titanium alloy wire wound into the spring is prepared with forging, pressing and hot rolling technologies, the wire is subjected to solution treatment before being wound into the spring, and a finished product of the spring is subjected to aging and strengthening treatment. A titanium alloy which is used for preparing the spring can play a weight reduction role, and meanwhile, the titanium alloy has the good corrosion resistance and the long fatigue life in an ocean environment. With the adoption of the wire with the specially-shaped section, the section area can be increased under the condition that specifications of wires are similar, so that the rigidity of the spring is improved, and the usage requirement of the titanium alloy spring under the high workload can be met.

The invention relates to an articulated multiaxial drive and bidirectional driving electric bus, belonging to the technical field of electric bus structure. The articulated multiaxial and bidirectional driving electric bus is characterized in that a chassis frame is provided with two differential driving axles, two differential driving steering axles, a front cab and a back cab; wherein, the differential driving axles are arranged in the middle of a bus body; In the middle of the differential driving axles, a first differential motor and a second differential motor are respectively used for supplying a torque for wheels at both ends; the two axles are articulated by a bus passage turntable; the part of the bus body, where the two axles are articulated, is provided with passage soft connection matched with the bus passage turntable; the differential driving steering axles are respectively arranged at the front side and back side of the bus body. The articulated multiaxial and bidirectional driving electric bus of the invention has simple structure and convenient maintenance as well as realizes articulated connection, multiaxial drive and bidirectional driving. The adoption of the differential driving axles and differential driving steering axles reduces intermediate link, so the bus starts rapidly, which has low noise, flexible steering and saving power supply.

The invention relates to a method for construction of intertidal zone offshore wind power multi-pile conduit frame foundation pile sinking. The method is characterized in that pile sinking positioning and perpendicularity control are performed on steel pipe piles through a piling limiting frame, and a floating crane hydraulic impact hammer setting on a beach is utilized to perform hanging up and beating for pile sinking. The method comprises the steps of performing steel pipe pile processing and marine transportation, performing ship positioning, leveling the beach face of a pile sinking area, placing the piling limiting frame, injecting water to a water containing cavity in the piling limiting frame, adjusting the levelness of the piling limiting frame, vertically lifting the steel pipe piles, inserting the steel pipe piles in a pile holding device of the piling limiting frame, utilizing a piling hammer for pile pressing and utilizing the piling hammer for pile sinking. The method has the advantages that the steel pipe piles are guided and limited through the piling limiting frame, pile sinking perpendicularity is guaranteed, accuracy of relative positions of the steel pipe piles of every foundation is guaranteed, construction of a whole fan foundation can be finished by one-time ship parking, a construction process is simplified, and construction efficiency is greatly improved.

The invention relates to a self-coupling ultrasonic detection probe device. The device comprises a supporting component and a rolling component, wherein the supporting component comprises a support, a water tank, a hollow shaft and nuts, the water tank is installed above the support, the hollow shaft penetrates through the lower end of the support, and two ends of the hollow shaft are fastened through the nuts; the rolling component comprises a probe, two sealing bearings, round plates and a rubber membrane, the probe is installed on the hollow shaft and located between the two sealing bearings, the sealing bearings are embedded in circle centers of the round plates and installed on the hollow shaft, a position between the two round plates is coated with the rubber membrane, a sealed space is formed between the two round plates, and the probe is connected with an ultrasonic detector through a lead. The self-coupling ultrasonic detection probe device is simple in structure, convenient to operate and high in detection efficiency.

The invention discloses a tension-compression type residual stress calibration device, which belongs to the technical field of experimental stress measurement in material processing. The device includes a tension and compression loading mechanism, a clamping mechanism and a supporting mechanism. The tension-compression loading mechanism applies uniform tensile or compressive stress in the direction of the entire thickness of the calibration material; the clamping mechanism can adjust the clamping position according to the tension-compression type of the calibration material; the tension-compression loading mechanism and Clamping mechanism, and can adjust the height by itself. The present invention can be used as a supporting loading device for residual stress detection methods such as blind hole method, indentation strain method, etc., to accurately calibrate the stress-strain relationship of materials under tensile stress state and compressive stress state. It solves the problems of convenience and ease of use but uneven stress field during three-point bending loading, or the need for large-size samples and difficult loading when using a tensile testing machine for calibration.

The invention discloses a simple hexagonal brick laying device. The simple hexagonal brick laying device comprises a supporting bottom plate, side supporting plates arranged at the left and right endsof the supporting bottom plate, screw rods arranged in the middles of the side supporting plates and brick boxes arranged at the upper ends of the screw rods, wherein the left and right ends of the upper end face of the supporting bottom plate are symmetrically provided with the two plate-shaped side supporting plates, and two cylindrical rod-shaped guide shafts are symmetrically arranged at front and back between the side supporting plates; hexagonal bricks are introduced into a guiding groove from an inclined supporting plate along a conveying port through the vibration of a vibration motor, the hexagonal bricks slide down to the front end of the guiding groove and fall into a laying layer on the ground from a laying groove, and a driving motor drives the screw rods to drive the brick boxes to move so that an entire machine completes automatic laying, thereby improving the laying efficiency and reducing the construction cost; when the hexagonal bricks fall onto the ground from the laying groove, a hydraulic cylinder drives a pushing and pressing rod and an elastic pad to press the hexagonal bricks, so that the hexagonal bricks are laid on the ground compactly, thereby avoiding the uneven stress during laying, and therefore the quality of the laid brick layer is better.

The invention discloses an automatic fuel cell stack assembling and detecting device, which comprises a rack, a material conveying assembly used for conveying different assemblies forming an electricpile to a designated position, an electric pile output assembly used for outputting assembled electric piles, a pressing assembly used for providing stable and accurate pressure for the electric piles, an automatic lifting assembly used for enabling a hydraulic workbench of the pressing assembly to be located at different heights so as to adapt to electric piles of different specifications, a limiting assembly used for limiting the stacking position of an electric pile assembly on the bottom plate of the rack, an automatic tightening assembly comprising an electric screwdriver, and an air tightness detecting assembly comprising an air cylinder, a connecting pipeline of the air cylinder and a quick-screwing plug and used for detecting the air tightness of the electric piles. The device is high in automation degree, manpower is greatly saved, and the phenomenon that the parts of an electric pile are stressed unevenly is avoided. A positioning pin can be pulled out stably by an automaticpin pulling device, and damage to the electric pile assembly in the manual pin pulling process is avoided.

The invention discloses a large-tonnage foundation pile uplift-resistant static test connection device. The large-tonnage foundation pile uplift-resistant static test connection device mainly comprises a cubic hollow shell, a lower connection rod connected with a longitudinal rib on an uplift-resistant tube pile to be detected, and an upper connection rod connected with a loading counter-force device. The lower connection rod is vertically arranged on the bottom surface of the shell; the position of the lower connection rod is opposite to the position of the longitudinal rib on the uplift-resistant tube pile to be detected in the up-down direction; and the upper connection rod is vertically arranged on the top surface of the shell. The invention also discloses the loading counter-force system which consists of the test connection devices, and a testing method thereof. According to the large-tonnage foundation pile uplift-resistant static test connection device, the loading counter-force system and the testing method, the vertical connection between the longitudinal rib on the uplift-resistant tube pile and the lower connection rod is basically realized, the uniform stress phenomenon of the longitudinal bar is avoided, the accuracy of test results is ensured, and the completeness of the tube pile is also guaranteed. The device can be repeatedly used, so that the quality of engineering piles is improved, the engineering hidden trouble is reduced, and the device is suitable for uplift-resistant static tests of the foundation piles with the pile diameter of 2m and the test load of about 20,000kN.

The invention discloses a truss 3D floor plate perforating machine, and belongs to the field of floor plate production equipment. The perforating machine comprises a screw feeding mechanism, wherein the screw feeding mechanism comprises a first perforating assembly, a second perforating assembly and a screw feeding assembly, the first perforating assembly comprises a plurality of first perforating drill bits, and the first perforating drill bits are used for perforating a first workpiece; the second perforating assembly comprises a plurality of second perforating drill bits, and the second perforating drill bits are used for perforating a second workpiece; the screw feeding assembly comprises a plurality of screw feeding heads, and the screw feeding heads are used for fastening the first workpiece and the second workpiece; and under the action of a conveying mechanism, the first perforating assembly is used for perforating the first workpiece to form a first hole, the second perforating assembly is used for continuously perforating the second workpiece along the first hole to form a second hole, and then the second workpiece is conveyed to the screw feeding assembly to connect the first hole with the second hole.

The invention discloses a multi-point equal clamping device applied to the field of mechanical tools. The multi-point equal clamping device is characterized by structurally comprising a plurality of claw fingers and a claw finger drive device, wherein each claw finger comprises a clamping part, and the position, towards a clamped object, of each clamping part is uniformly equipped with a pluralityof hydraulic cylinders; each hydraulic cylinder comprises an oil cylinder piston and a pressure cavity; the pressure cavity on the same claw finger is in communication; and each oil cylinder piston comprises a clamping end which extends to the outside of the corresponding clamping part. The clamping ends of the hydraulic cylinders are utilized to perform clamping operation; pressure cavities of the hydraulic cylinders communicate with one another, so that the position of hydraulic oil also can be transferred according to different pressure, and therefore, the occurrence of a condition that acting force between the clamping ends and workpieces is too high is avoided. Circulating action of the hydraulic oil guarantees stress uniformity of the surface of the clamped object, so that a workpiece damage rate is effectively reduced, and the take-up effect of the clamped object is guaranteed. Meanwhile, weakening, caused by stress deformation, of clamping force can be eliminated during claw clamping by uniform stress, so that guarantee is provided for clamping force, on the clamped objects, of the claw fingers.

The invention relates to the technical field of display, and in particular, relates to a curling device which is used for curling a flexible screen body and comprises a plurality of first reels and asupporting frame, and the shaft radiuses of the first reels are the same. The supporting frame supports the multiple first reels, so that the multiple first reels are arranged in parallel, and for atleast two adjacent first reels continuously wound on the flexible screen body, the connecting line of the centers of every two adjacent first reels located at the interval of every two adjacent firstreels is completely located in the flexible screen body. According to the embodiment of the invention, the curling stress borne by the flexible screen body during curling is relatively uniform, and the uniformity of the flexible screen body at different positions is high, so that the display effect of the flexible screen body is improved.

A method for manufacturing a sensor intermediate product includes: disposing a tubular holder and a tubular compact in a tubular metallic shell, and inserting a metallic pin into a first insertion hole of the holder and a second insertion hole of the compact; compressing the compact so as to form a filling member intermediate having a shape which brings the filling member intermediate into pressure contact with the inner wall surface of the metallic shell and allows removal of the metallic pin from the second insertion hole; pulling out the metallic pin from the first insertion hole and the second insertion hole; inserting a sensor element into the first insertion hole and the second insertion hole; and compressing the filling member intermediate to thereby form a filling member which fixes the sensor element inside of the metallic shell.

The invention relates to a special-shaped steel tube forming technology for a semitrailer fence. The special-shaped steel tube forming technology for the semitrailer fence comprises the steps of first, uncoiling, wherein steel strip rolls are unfolded; second, leveling, wherein unfolded steel strips are leveled, and are conveyed to a next station; third, end flattening and butt welding, wherein the head portion and the tail portion of one leveled steel strip are cut to be flattened, and the material tail of the steel strip with ends cut to be flattened and the material head of a next steel strip with ends cut to be flattened are welded together; fourth, beforehand storage, wherein the steel strips subjected to butt joint are sent into a loop storage silo; fifth, forming, wherein the steelstrips in the loop storage silo are sent to a forming machine, and are sequentially bent into tube blanks to be welded; sixth, high efficiency welding, wherein high efficiency welding is carried out after the two ends, in butt joint, of every two adjacent tube blanks are pressed to form a certain open angle; seventh, water cooling, wherein the steel tubes subjected to high efficiency welding are cooled to the room temperature in a spraying manner; eighth, special shape gradual sizing, wherein the steel tubes subjected to water cooling are sized through a sizing unit; and ninth, profile machining, wherein the sized steel tubes are segmented into steel tube bodies of specific lengths.

The invention relates to the technical field of heat-resistant glass, in particular to a high-intensity tempering process of heat-resistant glass. The process comprises the steps of heating of the heat-resistant glass, spraying cold quenching, air cooling of the heat-resistant glass, liquid cooling of the heat-resistant glass and drying of the heat-resistant glass drying. Compared with a traditional mode of quenching via a single quenching medium, a multi-layer cold quenching mode in the invention forms a temperature step, and cold quenching temperature is more uniform from high to low, so thecracking of the heat-resistant glass caused by uneven stress on the heat-resistant glass is prevented, the probability of spontaneous explosion in the toughening process of the heat-resistant glass is reduced, and the strength of the heat-resistant glass after toughening is effectively improved.

The invention discloses complete equipment for preparing liquefied consolidated soil from waste residue soil and a construction method of the complete equipment. The complete equipment comprises a screening device, an ingredient conveying device, a material storage device, a material conveying device, a stirring device, a finished product material temporary storage bin, a pumping device, a finished product material conveying pump and a control device. The discharging end of the screening device is connected with the feeding end of the ingredient conveying device. The discharging ends of the ingredient conveying device and the pumping device are both connected with the feeding end of the stirring device, the discharging end of the stirring device is connected with a feeding port of the finished product material temporary storage bin, a discharging port of the material storage device is connected with a feeding port of the material conveying device, and a discharging port of the material conveying device is connected with the ingredient conveying device. The finished product material conveying pump is connected with a discharging port of the finished product material temporary storage bin through a pipeline, and the screening device and the ingredient conveying device are arranged in a radial offset mode. In general, the complete equipment for preparing the liquefied consolidated soil from the waste residue soil and the construction method of the complete equipment have the advantages of being convenient to use, accurate and stable in metering, small in operation difficulty, short in construction period and good in construction quality.

A method of forming an isolation structure includes the following steps. A substrate having a first trench, a second trench and a third trench is provided, wherein the opening of the third trench is larger than the opening of the second trench, and the opening of the second trench is larger than the opening of the first trench. A first oxide layer is formed to conformally cover the first trench, the second trench and the third trench by an atomic layer deposition (ALD) process. A second oxide layer fills up the first trench by an in-situ steam generation (ISSG) process.

The invention provides a glass ceiling connection structure. The glass ceiling connection structure comprises a keel, a fire retardant panel and art glass which are arranged from top to bottom in sequence, and a through hole is only formed in the art glass. A tapping screw passes through the through hole, so that it is achieved that the art glass, the fire retardant panel and the keel are fixed. The through hole is a counter bored hole. An elastic layer is arranged at the head of the tapping screw, so that the tapping screw is isolated from the bottom wall and the side wall of the counter bored hole. In this way, in the installation construction process of a single piece of art glass, the tapping screw makes elastic contact with the bottom wall of the counter bored hole, and in the compression process, the phenomenon that stress of joint parts is not uniform can be effectively avoided. Besides, even when the tapping screw is obliquely inserted, the tapping screw can be prevented from making rigid contact with the art glass, so that cracks are generated in the contact part of the art glass, and the construction reliability is improved. Besides, the invention further provides a ceiling lamp connection structure matched with the glass ceiling connection structure.