13results about How to "Rigid and stable" patented technology

The invention provides an underwater extensible acoustic array carrying device, which comprises an autonomous control sealed cabin assembly, a bearing frame assembly, a motor driving assembly, a thrust seat assembly, an extension arm assembly, a tightener and a tightening rope, and is characterized in that the tightener and the tightening rope can adjust the position of the extension arm assembly; the autonomous control sealed cabin assembly is installed on the bearing frame assembly through bolts, the thrust seat assembly is arranged on the bearing frame assembly, and the thrust seat assembly moves up and down to drive the stretching arm assembly to be unfolded and folded. The acoustic array is flexible in arrangement, stable in structure, large in folding and unfolding ratio, stable and reliable in unfolding process, high in overall structure unfolding rigidity, stable in acoustic array type and convenient and fast to machine and assemble, and mistaken touch caused by the water pressure effect under the large water pressure environment can be avoided.

The application relates to a digital twin cooperative control system and method for batch testing of unmanned aerial vehicle rudders, which comprises a multi-channel loading test bench, an excitation twin module, a reference twin module, a twin bus and a test main control module; an excitation twin instance generates a target loading torque sequence according to a flight working condition script and shields the sampling feedback of the measured rudder, a reference twin instance generates an expected response sequence according to a control instruction and sampling feedback, the twin bus aligns the test beats of each measured channel according to a unified flight working condition script progress, and a test main control module completes qualification determination based on the difference between the expected response sequence and the actual measured response sequence. The application has the advantages of resolving the excitation-reference role conflict of the twin, realizing multi-channel horizontal cooperation and protecting the edge qualified measured rudder.

The invention provides an image-guided double-radio-frequency acousto-optic deflection laser cell cutting system and method, and the system comprises a microscopic imaging module which is used for collecting a cell image; the imaging control module is used for controlling the microscopic imaging module to collect cell images and extracting contours of the collected cell images to obtain cell contour coordinates; the laser cutting module is used for emitting pulse laser, performing X-direction and Y-direction double-radio-frequency acousto-optic deflection on the pulse laser, and cutting the cell contour by using the obtained deflection laser; and the cutting control module is used for acquiring a mapping relation between the coordinate system of the microscopic imaging module and the radio frequency of the double-radio-frequency acousto-optic deflection to obtain a coordinate-frequency mapping model, and controlling the laser cutting module to perform the double-radio-frequency acousto-optic deflection on the pulse laser according to the cell contour coordinates and the coordinate-frequency mapping model. According to the invention, the cutting welting accuracy and repeatability can be improved.

This application discloses a grinding wheel dresser spindle, including a rotating shaft unit at the left end and an unloading unit at the right end. An annular positioning groove is provided in the middle of the housing, and a spring sleeve is installed there. The rotating shaft is fitted inside the cavity of the housing, and bearing assembly I and bearing assembly II are installed on the outer surfaces of both ends of the rotating shaft. A spacer is provided between bearing assembly I and bearing assembly II. An externally threaded nut I is installed on the right section of the rotating shaft. An end cover is installed at the left end of the housing; a recessed structure is provided at the left end of the end cover to install a skeleton oil seal. A dust cover is fitted on the outside of the end cover. This grinding wheel dresser spindle, by using an annular positioning groove inside the housing to fit and install a fixed spring sleeve, adjusts the bearing preload and maintains the stability of the spindle's rigidity. The unloading unit reduces the bending effect of radial force on the rotating shaft, improving the rotational accuracy of the shaft. The multi-layered sealing dustproof structure effectively prevents dust and wastewater from entering the spindle, extending its service life.

The application belongs to the technical field of high polymer materials, and particularly relates to a heat-resistant blister packaging box and a preparation method thereof. According to weight parts, the heat-resistant blister packaging box comprises the following raw materials: 100 parts of polylactic acid, 4-8 parts of heat-resistant stabilizer, 1-3 parts of nucleating agent, 0.5-1 parts of chain-extending compatibilizer, 0.1-0.5 parts of antioxidant, and 0.1-0.3 parts of release agent. The application designs a multifunctional heat-resistant stabilizer with an aromatic imide-sulfone-siloxane structure, and constructs a synergistic crystallization system with a phenyl zinc phosphonate nucleating agent, and cooperates with a segmented temperature control rapid heat setting process. The heat distortion temperature of the obtained blister packaging box can reach 93.1 DEG C, the light transmittance is kept above 89.5%, the haze is below 3.5%, the forming cycle is shortened to 6-10 seconds, and there is no small molecule migration risk, so that the industrial production needs of the heat-resistant transparent packaging for food contact are met.

The utility model discloses a multifunctional kitchen knife holder, which belongs to the technical field of multifunctional knife holders and comprises a box frame and a chopstick frame, a clamping plate is arranged in a fixed seat, a second screw rod is rotatably connected to the inner side of a second slide rail, a first motor is arranged outside the second slide rail, and a second screw rod is rotatably connected to the inner side of the first screw rod. The upper surface of the fixed seat is symmetrically provided with a first motor, the upper surface of the second sliding seat is symmetrically provided with two second motors, and output shafts of the two second motors penetrate through the second sliding seat and are connected with a grinding head. A ground kitchen knife can be fixed through the fixing base, the grinding head can be driven by the second motor to rotate, the kitchen knife is ground, the best grinding angle for the kitchen knife is achieved by inclining the second motor and the grinding head, the kitchen knife is ground to be sharper, and the problem that an existing kitchen multifunctional knife holder cannot achieve the functions is solved.

The invention discloses an ultra-thin copper foil suitable for HDI board and its preparation method and application, comprising the following steps: using additives and electrolyte to electrolyze foil to obtain the ultra-thin copper foil; wherein the additives contain hexylbenzylamine salt, sodium polydisulfide dipropane sulfonate, sodium N,N-dimethyl-dithiocarbonyl propane sulfonate, hydroxyethyl cellulose, polyethylene glycol, hydrolyzed collagen and agarose. The invention can control the crystallization process of raw foil by compounding brightener, displacement agent and leveling agent, and obtain raw foil with fine and uniform grains, uniform peak size and gentle peak shape, so that the raw foil has a certain rigidity fundamentally, and solves the problem of poor rigidity of ultra-thin copper foil in the processing of HDI board.

The application discloses a desktop-level particle 3D printer, which comprises a base, an electrical machine box and a double-layer gantry, the double-layer gantry is fixed on the base, the electrical machine box wraps the double-layer gantry and is fixed on the base, a slidable Y-axis assembly is arranged on the base below the double-layer gantry, a liftable Z-axis assembly is arranged between the double-layer gantry, a slidable X-axis assembly is arranged on the Z-axis assembly, a detachable extrusion device is arranged on the X-axis assembly, a printing platform is arranged on the Y-axis assembly, the extrusion device melts plastic particles, extrudes from a nozzle and prints on the printing platform, various conventional plastic particles and composite modified material particles can be used for 3D printing, the traditional mode of using plastic wires as raw materials for printing of small 3D printers is changed, and the printing capacity and printing speed are greatly improved.

The utility model provides a high-precision and high-performance thread spinner outer side wall plate which comprises a wall plate installation bottom plate, a supporting wall plate, an outer side reinforcing edge, a reinforcing rib, a working roller, an extending supporting seat and an auxiliary roller, the supporting wall plate is fixedly installed on the surface of the wall plate installation bottom plate, the outer side reinforcing edge is fixedly installed on the outer side of the supporting wall plate, and the reinforcing rib is fixedly installed on the outer side of the supporting wall plate. The reinforcing rib is fixedly mounted between the wallboard mounting bottom plate and the supporting wallboard; the working roller is rotationally installed in the supporting wall plate, the extending supporting base is fixedly installed on the surface of the outer side reinforcing edge, and the auxiliary roller is rotationally installed in the extending supporting base. Due to the arrangement of the supporting wallboards, the outer side reinforcing edges and the extending supporting seats, the requirements of the modern textile industry for high precision, high stability and high performance can be met.

The invention discloses a powder metallurgy forming air bearing, and belongs to the technical field of air floating foot cups, the powder metallurgy forming air bearing comprises an air floating base, a ball valve fixing groove is formed in the upper end of the air floating base, a universal ball head is arranged in the middle of the ball valve fixing groove, and an adjusting screw rod is arranged at the upper end of the universal ball head; a universal ball head is arranged at the upper end of the air floatation base, a ball head fixing seat is arranged at the position, located on the surface of the universal ball head, of the upper end of the air floatation base, and a connecting port is formed in the side edge of the air floatation base. The gas enables a gap between an adjusting screw rod processed by a powder metallurgy material and a bearing surface to form a gas film, and a reaction force is generated between a powder metallurgy body and the bearing surface, so that a plane air floatation plate made by powder metallurgy relatively suspends, and the plane air floatation plate and the bearing surface work in a non-contact manner, the gas plays a supporting role, the bearing capacity is improved, and the service life of the plane air floatation plate is prolonged. The stable rigidity is realized.

The invention relates to the technical field of machine tool machining equipment, in particular to a double-stand-column movable beam machining center which comprises gantry stand columns, a carrying structure, a driving structure, a spindle box, a replacing structure, a mounting structure and a hoisting structure. The wear-resistant blocks at different positions of the bottom end of the workbench are quickly disassembled and replaced through the replacement structure, so that the disassembly and assembly convenience of the wear-resistant blocks is improved, and meanwhile, the replacement efficiency of the wear-resistant blocks is improved; the position of the spindle box is adjusted through the driving structure, parts of different positions and different sizes can be conveniently machined, the combination of the double-gantry stand column and the cross beam is adopted, stable supporting and rigidity can be provided in the machining process, and the part machining effect is improved; the workbench is hoisted through the hoisting structure, the workbench is installed more easily and rapidly, meanwhile, damage to the second sliding rail is reduced, the workbench and the multiple sliding bases are rapidly fixed through the installation structure, the installation efficiency of the sliding bases is improved, and the installation difficulty of the workbench is reduced.

This invention relates to the field of welding fixture technology, and discloses a welding fixture for assembling automotive parts. The fixture includes a base with two symmetrically arranged movable plates on its top. A ring is mounted on each movable plate, and a clamping component is mounted on the ring. The clamping component includes a clamping assembly mounted on the ring, which is further equipped with a deformation component, an adjustment component, and a linkage pushing component. This welding fixture for assembling automotive parts achieves adaptive flexible clamping of automotive parts of different shapes, such as square and round, through a rotatable and adjustable first clamping plate combined with a hollow rubber plate structure. This overcomes the shortcomings of traditional fixtures, which can only adapt to a single shape of workpiece and require frequent replacement. The deformation component drives the first clamping plate to rotate, forming a V-shaped clamping structure. Combined with the linkage pushing component and the adjustment component, it automatically adapts to the workpiece shape, transforming line contact into surface contact, significantly increasing the force-bearing area and reducing local pressure.