7results about How to "Improve stress stability" patented technology

This utility model relates to a cutting blade, belonging to the technical field of ultrasonic probe manufacturing equipment. The cutting blade is disc-shaped and used for rotary cutting of an ultrasonic probe to form piezoelectric array elements. The cutting blade includes a blade body and multiple gradient layers disposed on the outer side of the blade body. The multiple gradient layers are connected sequentially along the radial direction of the blade body, and the thickness of each gradient layer gradually decreases radially outward. Adjacent gradient layers are connected in a stepped manner, and the outer edge of each gradient layer away from the rotation center axis of the cutting blade forms a cutting edge, so that the cutting blade has multiple annular cutting edges arranged at radial intervals. The array elements of the probe cut by this cutting blade are pyramid-shaped, with narrow ends and wide bottoms, which ensures that the formed ultrasonic probe piezoelectric array elements are uniform in size, neatly arranged, and have better stability; effectively improving the resolution and stability of probe imaging.

This application discloses a method and system for Z-axis compensation of integrated circuit surface mount technology (SMT) for PCB board warpage, relating to the field of PCB board surface mount technology. The method includes: acquiring sampling data of the PCB board surface height and PCB board design information, extracting the physical structural features corresponding to each sampling point, and constructing a board surface warpage height model based on the sampling data; calculating the estimated board surface height for the target mounting position, and determining the Z-axis safe switching height of the mounting nozzle based on the thickness information of the component to be mounted and a preset safety margin; controlling the mounting nozzle to descend to the Z-axis safe switching height and then using a cutting force feedback correction mode, adaptively correcting the Z-axis displacement based on the dynamic error between the actual contact force and the target mounting force until the actual contact force falls within the preset error range to complete the mounting. This improves the accuracy of mounting height control, the stability of mounting force, and the consistency of mounting quality under complex warpage conditions.

The utility model provides a lifting lever type manhole cover opening device relates to municipal works technical field, including cross rod, the downside of cross rod is provided with lifting lever type manhole cover opening subassembly, lifting lever type manhole cover opening subassembly includes the inner recessed slide groove of setting in the inside of cross rod, the inside of inner recessed slide groove all installs hydraulic pressure adjusting sliding block, the downside of hydraulic pressure adjusting sliding block installs hydraulic pressure rod, the outside of cross rod all is provided with lifting lever sliding frame, the downside of driven rotating shaft is welded with pull -out rod, the end of pull -out rod installs manhole cover clamping plate, put two groups of hydraulic cylinder to the both sides of manhole cover, the hydraulic cylinder starts to fill liquid at this moment, promotes the ascending of hydraulic pressure rod, drives lifting lever sliding frame to ascend, like this can realize the lifting lever type stress of manhole cover, reaches the opening effect, and lifting lever sliding frame can be according to the width of manhole cover and along cross rod left and right horizontal displacement to can be clamped to the cross bar of manhole cover, ensure that the stress of manhole cover is even in the opening process, avoid the damage of single point stress too big.

This utility model relates to an automatic feeding device for a pipe thickening machine, comprising: an upper support, the lower side of which is connected to a lower support via a lifting mechanism and is driven to move up and down by the lifting mechanism; a linear guide rail is provided on the upper support; a fixed bracket assembly, including a fixed base plate and a liftable V-shaped wheel disposed thereon; a movable bracket assembly, which is slidably engaged with the linear guide rail via a movable base plate, and a liftable first V-shaped seat is provided on the movable base plate; a pipe clamping mechanism, which is slidably engaged with the linear guide rail via a clamping base plate, and the clamping base plate is provided with a linear drive mechanism, a gripper mechanism, and a liftable second V-shaped seat. The linear drive mechanism is used to drive the clamping base plate to move, and the gripper mechanism and the liftable second V-shaped seat are arranged parallel and spaced apart along the feeding direction, with the clamping center of the gripper mechanism coaxial with the center of the second V-shaped seat; the clamping base plate is connected to the movable base plate via a first connecting member. This utility model improves the positioning accuracy and stability of the pipe during the conveying process.

The present invention provides a mobile liquid hydrogen tank container, which includes an inner container and an outer container arranged outside the inner container. A plurality of sliding support structures are arranged between the inner container and the outer container in the circumferential direction. The sliding support structures are used to support the inner container and enable the inner container to slide along the axial direction relative to the outer container when thermal stress is generated in the mobile liquid hydrogen tank container. By setting the sliding support structure between the inner container and the outer container in a multi-point connection manner in the circumferential direction, the present invention reduces the contact area between the inner container and the outer container on the basis of supporting the inner container, achieves the purpose of reducing heat leakage, and the inner container is well stressed, which can improve the safety of the inner container.

This utility model relates to the field of communication base station technology, and in particular to a mobile integrated base station. It includes a cabinet with an inclined upper end. A solar panel assembly is rotatably mounted on the lower end of the inclined end. The upper end of the inclined end and the solar panel assembly are fastened together with bolts. Support rods are rotatably mounted on the side walls of the cabinet. The side walls of the solar panel assembly have insertion holes that mate with the support rods. A recessed groove is provided at the upper end of the inclined end, with the bottom wall of the groove recessed towards the rear wall of the cabinet. A mesh panel is detachably mounted on the rear wall of the cabinet at the bottom of the recessed groove. The recessed groove structure at the top of the cabinet allows electrical components to be embedded and installed without interference from the main equipment due to placement inside the cabinet. It also eliminates the need for maintenance personnel to reach into the cabinet through the door for disassembly and assembly, making operation more convenient. The three-point support structure formed by the rotating and adjustable solar panels and the support rods expands the operating space during maintenance, shortening the time required for line disconnection.

This invention discloses a medical nickel-titanium wire testing device, belonging to the field of mechanical testing, comprising a housing, a support plate, and a testing mechanism. Two sliders are slidably mounted on the top wall of the support plate; each slider is equipped with a clamping mechanism; the clamping mechanism includes a mounting groove formed on the slider, and a baffle covering the surface of the mounting groove is detachably mounted on the side wall of the slider; a through hole is formed on the side wall of the baffle. This invention effectively replaces the traditional friction winding clamp by adopting a clamping structure that combines negative pressure automatic guiding wire threading with in-situ embedding of photocurable resin, reducing the ineffective clamping length required at both ends of the nickel-titanium wire. This clamping mode allows for the direct use of small segments of finished instruments, several centimeters long, for high-precision testing, and converts the radial clamping force into a uniform axial shear force within the resin block during stretching, thereby reducing the probability of stress concentration and breakage of the filament at the clamping point, and also reducing the consumption of expensive medical-grade nickel-titanium raw materials.