9 results about "Micro geometry" patented technology

The invention relates to the field of mechanical engineering, and discloses a processing design method based on a diamond cutter for optical fiber cutting. The method comprises the following steps: acquiring three-dimensional shapes and optical performance indexes of optical fiber end surfaces cut by a diamond cutter with different cutting edge parameters; microcosmic geometrical characteristics such as cutting edge curvature gradient, crystal orientation, collapse density and surface power spectrum density are extracted; constructing a physical interpretable neural network model embedded with fracture mechanics and optical waveguide constraint; reversely solving a cutting edge parameter set meeting the target optical performance; and an ultra-precision machining path is generated, and the single-point diamond lathe is controlled to machine the diamond cutter in a customized mode. Through closed-loop optimization and online fine tuning, the end face reflectivity stability and mode field consistency are improved, the return loss standard deviation is reduced, and the high-speed optical communication requirement is met.

This invention discloses a method and system for constructing the true value of the microscopic morphology of the inner wall of a pipeline based on spatial domain triggering and dynamic shutter control, belonging to the field of pipeline inspection technology. It employs a dynamic time-division stroboscopic acquisition strategy based on spatial sampling consistency to ensure that the four image sequences required for photometric stereo vision overlap in physical space. It introduces dynamic shutter control based on instantaneous velocity to reduce the non-uniformity of imaging quality caused by the variable speed movement of multiple sensor modules. A robust photometric stereo algorithm is used to decouple and separate the pure pipe wall texture and micro-geometry, and reconstruct a high-precision 3D depth map. Finally, standardized true value data integrating position, texture, and geometry is constructed. This invention solves the problem in existing photometric stereo vision methods where multiple frames acquired under different lighting conditions are difficult to keep spatially consistent when the carrier is in continuous motion or experiencing mechanical micro-vibration, leading to significant errors in normal vector calculation and 3D reconstruction results.

The application relates to the field of mechanical engineering and discloses a machining design method based on a diamond cutter for fiber cutting. The method comprises the following steps: collecting the three-dimensional morphology of a fiber end face cut by diamond cutters with different edge parameters and optical performance indexes thereof; extracting microscopic geometric features such as edge curvature gradient, crystal direction orientation, collapse density and surface power spectral density; constructing a physically interpretable neural network model embedded with fracture mechanics and optical waveguide constraints; reversely solving an edge parameter set meeting target optical performance; and generating an ultra-precision machining path to control a single-point diamond lathe to customize diamond cutter machining. Through closed-loop optimization and online fine adjustment, the application improves the stability of end face reflectivity and the consistency of mode fields, reduces the standard deviation of return loss, and meets the requirements of high-speed optical communication.

The invention provides a clamp for visual intelligent detection after forming of a spring piece for an automobile braking system, and relates to the technical field of visual intelligent detection, the clamp comprises a base and a first mounting rack, the upper surface of the first mounting rack is provided with six movable grooves arranged in a circumferential array, and the movable grooves are internally provided with clamping mechanisms; a clamping mechanism is arranged on the upper surface of the base, a spring piece is arranged on the outer side of the clamping mechanism, a detection frame is fixedly connected to the upper surface of the base, a penetrating groove is formed in the detection frame, and an adjusting mechanism is arranged in the penetrating groove. According to the method, metal surface reflection interference can be inhibited in a targeted manner, natural textures and actual cracks can be accurately distinguished, surface fine cracks, sub-surface defects and microscopic geometrical morphology can be respectively identified by means of characteristics of different light sources, the detection misjudgment rate is reduced, and the high-precision and high-efficiency detection requirements after the spring piece is formed are met.

The application relates to a SiC f ultrasonic vibration assisted cutting finite element simulation method of SiC, which comprises the following steps: (1) establishing a three-dimensional micro-geometric model (workpiece model and tool model); (2) dividing the grid; setting the tool model as a rigid body; setting the grid element type and grid size of the workpiece model and the tool model; (3) defining the boundary conditions; the boundary conditions comprise: a) all six degrees of freedom of the bottom of the workpiece model are completely constrained; b) the cutting speed of the tool model is equal to the actual cutting speed of the tool in the experiment; c) the motion speed function of the tool model under three cutting conditions satisfies a specific expression; (4) defining the material constitutive model and the damage criterion; (5) defining the contact condition; (6) calculating and precision control; (7) submitting the task and carrying out the finite element simulation calculation. The application can make up for the defects of the prior art and realize the simulation of the material removal mechanism of SiC f / SiC in ultrasonic vibration assisted cutting.

The invention provides a graded concave arc bionic pattern tire structure. The graded concave arc bionic pattern tire structure comprises central ribs, central longitudinal grooves, tire shoulder region longitudinal grooves, transition region first-stage transverse grooves, tire shoulder region second-stage transverse grooves, transition region pattern blocks and tire shoulder region pattern blocks, the first-stage transverse groove of the transition area and the second-stage transverse groove of the tire shoulder area are of a multi-stage arc structure imitating the macro-micro geometric structure of the carved owl wing feather; the transition area first-stage transverse groove comprises a first arc; the tire shoulder area second-stage transverse groove comprises a second circular arc and a third circular arc; the curvature radius of the first arc is smaller than that of the second arc and that of the third arc, and the curvature radius of the second arc is smaller than that of the third arc; the tangent line of the first arc and the outer side wall of the central longitudinal groove form a certain included angle, and the tangent line of the second arc and the inner side wall of the tire shoulder longitudinal groove form a certain included angle. According to the bionic symmetrical pattern tire structure designed by the invention, collision between fluid particles and the side wall surfaces of the longitudinal and transverse grooves can be reduced, the vortex strength is reduced, the stability of a flow field in the tread pattern grooves is improved, and the pneumatic noise of the tire is reduced while the water skiing performance of the tire is improved.

This disclosure relates to a method and a system for evaluating the microgeometry of gears. The disclosure includes receiving a plurality of gear profiles from predefined sources. Each of the multiple gear profiles consists of corresponding peaks and valleys of predefined parameters associated with the gears. The method further includes classifying each of the plurality of gear profiles as an acceptable gear profile and an unacceptable gear profile. The classification is performed based on predefined thresholds associated with the predefined parameters relating to the peaks and valleys in each of the multiple gear profiles, using a classification model. The method then includes evaluating the microgeometry of the gears based on the classification.

The invention discloses a welding extrusion adjusting method and device for a high-frequency welded pipe and a storage medium, and relates to the field of welded pipe welding. The method comprises the following steps: determining extrusion deformation before and after welding extrusion; according to the welding seam parameters corresponding to the extrusion deformation, the corresponding relation between the extrusion deformation and the welding seam parameters is determined; the optimal welding seam parameters are determined in the mode of adjusting the extrusion deformation amount; according to the corresponding relation between the extrusion deformation and the weld parameters, the optimal extrusion deformation corresponding to the optimal weld parameters is determined; and welding parameters are adjusted according to the optimal extrusion deformation. Whether the extrusion amount of the weld joint is appropriate or not is accurately determined through the microscopic geometrical morphology of the weld joint, macroscopic mechanical adjustment of the process parameters is guided accordingly, the high-frequency welding extrusion amount can be accurately adjusted, the stability of the welding process is improved, monitoring of the process parameters of the welding process is facilitated, and the weld joint quality is improved; and it is effectively guaranteed that the comprehensive mechanical performance of the weld joint meets the requirement of the pipe manufacturing standard.

The invention relates to the field of mechanical engineering, in particular to a method for predicting the service life of a nib spring, and aims to solve the problem that in the prior art, although a traditional digital simulation technology can provide part of prediction capacity, model construction of the traditional digital simulation technology is often limited to macroscopic structure parameters and cannot be brought into microcosmic geometric defect factors generated in the manufacturing process. By acquiring the key defect parameters and combining the digital twinborn model and the lightweight time sequence AI model for prediction, the method has the advantage of efficiently and accurately predicting the fatigue life of the nib spring.