56 results about "Mechanical products" patented technology

The invention discloses a straight tooth extrusion wheel for internal spline inverted conical teeth and a machining method for the internal spline inverted conical teeth, and belongs to the technical field of mechanical product machining. The method comprises the following steps: broaching a to-be-processed workpiece to form an internal spline straight tooth structure; the straight tooth structure of the internal spline is subjected to inverted conical tooth extrusion machining, and metal allowance generated by extrusion deformation synchronously flows to the tooth side area and the small-diameter area of the internal spline; a straight tooth extrusion tool matched with an inverted conical tooth extrusion tool is adopted, secondary extrusion machining is conducted on the straight tooth area of the internal spline, and metal allowance flowing to the tooth side area of the internal spline is completely transferred to the small-diameter area; and the small-diameter area of the internal spline is machined, a bulge structure formed by the transferred metal allowance is removed, and machining of the reverse taper teeth of the internal spline is completed. Secondary gear burnishing is used, the small-diameter allowance is removed through follow-up machining, and the problem that the machining cost of an original internal spline reverse taper gear is too high is solved.

The invention discloses a mechanical product multi-field simulation and prediction system based on digital twinning, and relates to the technical field of thermal error digital twinning. A main shaft load current, a rotating speed, a bearing temperature, a workpiece surface temperature and a cooling liquid parameter are obtained in real time; rapidly predicting a first thermal error according to the load current and the rotating speed by using a preset multi-layer feed-forward neural network, dynamically calculating a thermal inertia time coefficient in combination with the cooling liquid efficiency and the thermal state of a workpiece, and filtering and extracting a slowly-changing thermal state from the temperature of a main shaft bearing according to the thermal inertia time coefficient, thereby obtaining second thermal error prediction; a fusion weight is generated according to the load current change rate and the thermal inertia time coefficient, weighted fusion is carried out on the two predicted values, and a compensation instruction is output; and by monitoring the stability of the fusion weight, the thermal inertia time is reversely and dynamically adjusted to suppress oscillation. According to the method, high-robustness and self-adaptive accurate compensation of complex thermal errors is realized in field processing with changeable environments and working conditions, and the long-term stability of processing precision is remarkably improved.

The invention discloses a mechanical product overhaul life determination method based on preventive maintenance, and relates to the technical field of mechanical product reliability and maintenance engineering, and the method comprises the following steps: S1, constructing a mechanical product disciplinary cross equation; s3, constructing a mechanical product performance degradation model based on preventive maintenance, and estimating unknown parameters by adopting a maximum likelihood estimation method so as to determine a relationship between a performance degradation amount and time; and S4, estimating parameters of the performance degradation model and finally determining the overhaul life of the mechanical product. According to the method, the influence of preventive maintenance on the mechanical product performance is comprehensively considered, the performance fluctuation and degradation process caused by the maintenance activity is described by constructing the segmented performance degradation function, and the relationship between the performance degradation amount and the time is determined by using the maximum likelihood estimation method; and the finally determined overhaul life of the mechanical product is more accurately applied to an actual engineering scene.

This application provides a method for uncertainty analysis in mechanical product assembly performance simulation. This method considers the impact of various uncertainty factors at different stages of the simulation process on assembly performance, classifying these factors into two categories for quantitative analysis. The first category includes the measurement, modeling, and simulation analysis stages in the early stages of simulation; the uncertainty u or error of these factors can be directly calculated. The second category consists of assembly performance uncertainties caused by external loads, boundary conditions, and nonlinear processes primarily based on geometric error distribution. For this category, this method uses simulation analysis results from a physical digital twin model, combined with the construction of an optimal SVR surrogate model and Sobol global sensitivity analysis, to quantitatively analyze the sensitivity of assembly performance to process parameters. In summary, this method provides guidance for the product assembly process.

1. Name of the designed product: adjusting screw. 2. Use of the designed product: used in engineering machinery and other mechanical products. 3. Design points of the designed product: in shape. 4. Picture or photo showing the design points: perspective view.

The present application relates to the field of laser welding, especially to a mechanical product multi-station laser welding machine. The mechanical product multi-station laser welding machine comprises a workbench, a laser, a three-axis module, an inclination mechanism, a laser head, a feeding mechanism and the like; the workbench is internally provided with the laser, the top of the workbench is provided with the three-axis module, the laser head is installed on the three-axis module through the inclination mechanism, and the laser head can adjust the pitch angle under the action of the inclination mechanism. Through the clamping piece, in the process of clamping the workpiece, when one small semicircular block contacts the workpiece, the large semicircular block and the middle semicircular block will automatically rotate until the other small semicircular block contacts the workpiece, and then the large semicircular block and the middle semicircular block stop rotating, so that each small semicircular block clamps the workpiece, so that the workpiece can be fixed more stably, and the fixation of workpieces with different shapes can be adapted.

A cutting insert (1) comprising: a basic body (3), comprising a first area (9), a second surface (11) which is arranged on one of the sides opposite the first surface (9), a first side surface (13) which is connected to the first surface (9) and the second surface (11), a second side surface (15) connected to the first surface (9), the second surface (11) and the first side surface (13), a first recess (17) which leads into the first surface (9), the first side surface (13) and the second side surface (15), and a second recess (19) which leads into the second surface (11), the first side surface (13) and the second side surface (15), a first part (5) with a triangular plate shape, which is arranged in the first recess (17) and has a first cutting edge (21) which is arranged at an intersection of two adjacent surfaces, and a second part (7) with a triangular plate shape, which is arranged in the second recess (19) and has a second cutting edge (23) which is arranged at an intersection of two adjacent surfaces, wherein the first recess (17) has a first floor surface (25) which is arranged away from the first surface (9), a first wall surface (27) which is arranged between the first floor surface (25) and the first surface (9), and a first valley line (29) which is located at an intersection of the first floor surface (25) and the first wall surface (27), the second recess (19) a second floor surface (31) which is arranged away from the second surface (11), a second wall surface (33) which is arranged between the second floor surface (31) and the second surface (11), and a second valley line (35) which is located at an intersection of the second floor surface (31) and the second wall surface (33), and where the first valley line (29) intersects the second valley line (35) in a perspective view onto the first surface (9).

The invention discloses a reliability evaluation method and device for a ship iterative mechanical product, a medium and a product, and relates to the field of reliability evaluation of ship mechanical products, and the method comprises the steps: obtaining a historical degradation and failure data set of a similar product of a target product; the historical degradation and failure data set is preprocessed; obtaining a degradation trend model of the similar product based on the preprocessed historical degradation and failure data set; acquiring supplementary test data of the target product; based on the supplementary test data, improving the degradation trend model to obtain a target product degradation trend model; and performing reliability evaluation on the target product based on the target product degradation trend model to obtain a multi-dimensional reliability evaluation index of the target product. According to the invention, the reliability evaluation efficiency, accuracy and real-time performance of the ship mechanical product can be improved.

The invention relates to the technical field of assembly task allocation, and discloses a mechanical product assembly task allocation method and system, which are used for solving the problems that when a plurality of available schemes exist during mechanical product assembly task allocation, the optimal scheme cannot be accurately selected, and the schemes cannot be adjusted in real time according to field state changes. Calculating and evaluating all the preliminary task allocation schemes to obtain a qualified task allocation scheme set, calculating a corresponding multi-dimensional normalized margin value for each qualified task allocation scheme in the qualified task allocation scheme set, selecting a final task allocation scheme, performing conflict detection on the final task allocation scheme, and if a conflict exists, determining that the final task allocation scheme does not exist. If yes, correcting the final task allocation scheme to obtain a final corrected task allocation scheme; and if the conflict item does not exist, the final task allocation scheme is directly regarded as the final corrected task allocation scheme, so that the continuity and intelligence of the mechanical product assembly process are effectively improved.

The invention relates to the field of simulation, in particular to a simulation test method and device for a mechanical product, electronic equipment and a storage medium, and the method comprises the steps: obtaining project information of a research and development product from a mechanical product research and development system, and controlling a design end to transmit the project information to a simulation end for display; controlling the simulation end to create a simulation task corresponding to the research and development product based on the project information, and controlling the simulation end to display the simulation task; a simulation report obtained after execution of the simulation task is completed is obtained, and the simulation end is controlled to display the simulation report; controlling the simulation end to transmit a verification result of the simulation report to the design end for display; responding to the test operation of the research and development product based on the verification result in the design end, generating a test task, and controlling the design end to send the test task to the test end for display; and obtaining a test report after the execution of the test task is completed, and displaying the test report at the design end, the test end and the simulation end. According to the invention, the research and development efficiency of mechanical products is improved.

This invention discloses a method for constructing a knowledge graph from 3D digital model design data for mechanical products. It primarily addresses the problem that existing technologies cannot acquire, represent, and reuse 3D model design data. The implementation scheme is as follows: 1) Integrating and processing the 3D model data; 2) Constructing a knowledge acquisition program to extract a total knowledge set from the 3D model; 3) Representing and constraining the total knowledge set to obtain a processed knowledge set; 4) Instantiating and tree-forming the processed knowledge set to generate feature trees representing functions, structures, and constraints; 5) Analyzing and processing the obtained feature trees to form sets of structure-structure, structure-function, and structure-constraint relationships; 6) Importing the obtained feature trees and relationship sets into triplet form into Neo4j to generate a knowledge graph. This invention can extract, represent, and reuse design data from 3D digital models and can be used for intelligent design of structural schemes for mechanical products.

The invention provides a complex mechanical product demand tracing method based on a demand management model, and the method comprises the steps: firstly analyzing a SysML demand model of a complex mechanical product, and constructing a heterogeneous graph structure with multiple attributes; constructing a heterogeneous graph neural network model based on an HGT architecture, and training the heterogeneous graph neural network model by adopting a training data set containing positive and negative samples and pseudo label data; verifying the correctness of the demand relationship in the SysML demand model of the complex mechanical product by using the trained heterogeneous graph neural network model, and identifying hidden demand association; and when a new demand or relationship is added, dynamically updating the heterogeneous graph neural network model through an incremental learning method. According to the method, automatic verification of the demand relationship and mining of potential association are realized, and the efficiency and reliability of demand management of complex mechanical products are remarkably improved.

A computer-implemented method of designing a 3D modeled object representing a mechanical product. The 3D modeled object has a feature tree and an original value of a set of semantic parameters. The method includes by a user graphically interacting with the 3D representation graphically selecting a semantic point of an outer surface of the 3D modeled object and graphically selecting one or more target 3D positions of the semantic point. The method further includes, automatically, iteratively modifying the value of the set of semantic parameters. Thereby the method obtains an updated value of the set of semantic parameters. The method further includes, automatically by the CAD system, updating the 3D representation of the 3D modeled object based on the updated value of the set of semantic parameters. This provides an improved solution for updating 3D modeled objects based on graphical interactions.

A robot joint component rapid splicing structure comprises a first joint connecting base and a second joint connecting base, two inclined bayonet platform parts are arranged on the upper side of the first joint connecting base, long-strip-shaped clamping inclined faces A are arranged on the opposite sides of the two inclined bayonet platform parts, and the long-strip-shaped clamping inclined faces A are obliquely arranged in the length direction and the width direction; an inclined clamping block platform part is arranged on the lower side of the second joint connecting base, long-strip-shaped clamping inclined faces B are arranged on the two opposite sides of the inclined clamping block platform part and matched with the long-strip-shaped clamping inclined faces A. Two stable limiting side platform faces are further arranged on the two sides of the inclined clamping block platform part. The two stable limiting side platform surfaces are tightly attached to the upper surfaces of the two inclined bayonet platform parts; a pulling locking device is further arranged between the first joint connecting base and the second joint connecting base. According to the utility model, the structure is simple and convenient to splice, convenient to disassemble, assemble, maintain and expand, and high in connection strength and stability, so that the overall performance and reliability of mechanical products are improved.

The present application relates to the technical field of assembly task allocation, and discloses a mechanical product assembly task allocation method and system, which are used to solve the problems that when mechanical product assembly task allocation is performed, multiple available schemes exist, the optimal scheme cannot be accurately selected, and the scheme cannot be adjusted in real time according to the change of the field state, and comprise the following steps: calculating and evaluating qualified task allocation scheme sets in all preliminary task allocation schemes, calculating a corresponding multi-dimensional normalized margin value for each qualified task allocation scheme in the qualified task allocation scheme sets, and selecting a final task allocation scheme; performing conflict detection on the final task allocation scheme, if there is a conflict, modifying the final task allocation scheme to obtain a final modified task allocation scheme; and if there is no conflict item, directly regarding the final task allocation scheme as the final modified task allocation scheme, thereby effectively improving the continuity and intelligence of the mechanical product assembly process.

A cutting insert (1), comprising: a first surface (3) having a corner (9) with a convex-curved shape in an outward direction and a first side (11) and a second side (13) extending each from the corner (9), a second surface (5) which is arranged on one of the sides opposite the first surface (3), and a third surface (7) arranged between the first surface (3) and the second surface (5), wherein an imaginary plane that is orthogonal to a central axis (O1) passing through a center point of the first surface (3) and a center point of the second surface (5), and is arranged between the first surface (3) and the second surface (5), is assumed to be the reference plane, the first surface (3) further has an inclined surface (17) which approaches the reference plane with increasing distance from the corner (9), the inclined surface (17) a first inclined surface (19) which is inclined at a first angle (θ1), a second inclined surface (21) which is arranged further away from the corner (9) than the first inclined surface (19) and is inclined at a second angle (θ2), and a third inclined surface (23) which is arranged further away from the corner (9) than the second inclined surface (21) and is inclined at a third angle (θ3), the first inclined surface (19) has a concave-curved shape in a cross-section orthogonal to an angle bisector (L1) of the corner (9), the second inclined surface (21) is a flat surface, and, in a cross-section that includes the angle bisector (L1) of the corner (9) and is orthogonal to the reference plane, the second angle (θ2) is smaller than the first angle (θ1) and the third angle (θ3), wherein in a top view of the first surface (3) a length (L32) of the third inclined surface (23) in a direction orthogonal to the angle bisector (L1) of the corner (9) is greater than a length (L22) of the second inclined surface (21) in the direction orthogonal to the angle bisector (L1) of the corner (9).

The invention belongs to the technical field of computer vision, and discloses a three-dimensional point cloud registration method based on point-line feature fusion, and the method comprises the steps: firstly completing the three-dimensional point cloud static registration of the surface of a target object through SAC-IA; establishing an initial motion transformation relationship between the three-dimensional point cloud of the 3D model of the target object and the three-dimensional point cloud of the surface of the target object; then, in a dynamic tracking stage, point features extracted through ORB are matched with line segment features extracted through LSD-LBD, coarse registration is achieved in combination with an EPnPL algorithm, mismatching is eliminated through RANSAC, and the robustness of pose estimation is improved; and finally, further optimizing pose estimation by adopting point-to-surface ICP (Inductively Coupled Plasma) in a fine registration stage. The method does not need to depend on manual identification, can complete stable three-dimensional point cloud registration completely based on natural features, and can be widely applied to complex scenes such as mechanical product maintenance and industrial assembly.

The application belongs to the technical field of computer vision, and discloses a three-dimensional point cloud registration method based on point-line feature fusion. The three-dimensional point cloud registration method firstly uses SAC-IA to complete static registration of three-dimensional point clouds on the surface of a target object, and establishes an initial motion transformation relationship from the three-dimensional point clouds of the 3D model of the target object to the three-dimensional point clouds on the surface of the target object. Then, in the dynamic tracking stage, point features extracted by ORB are matched with line segment features extracted by LSD-LBD, coarse registration is realized by combining an EPnPL algorithm, and the robustness of pose estimation is improved by eliminating false matching through RANSAC. Finally, in the fine registration stage, point-to-plane ICP is used to further optimize pose estimation. The method does not need to rely on artificial marking, and can complete stable three-dimensional point cloud registration based on natural features, and can be widely applied to complex scenes such as mechanical product maintenance and industrial assembly.

The utility model belongs to the technical field of mechanical product correction tools, and particularly relates to a rapid correction tool which comprises a workbench used for supporting a mechanical product and a plurality of correction assemblies detachably connected to the workbench. The workbench is provided with a plurality of connecting grooves used for being connected with the correcting assemblies. The correction assembly comprises a correction block, a positioning rod transversely and adjustably arranged on the correction block in a penetrating mode and a positioning block arranged at the bottom of the correction block. The positioning block is inserted into the connecting groove to achieve detachable connection between the correcting assembly and the workbench. The positioning tool is used for solving the technical problem that the production efficiency of the mechanical products is low due to the lack of positioning tools suitable for the mechanical products with different shapes and sizes at present.

The application relates to the field of mechanical product structure design and manufacturing, and provides a hexahedral mesh model generation method, CAE software, equipment and medium, which selects candidate cutting surfaces to form a candidate cutting surface set based on geometric data of a geometric model in the CAE software; each candidate cutting surface of the candidate cutting surface set is evaluated; the geometric model is cut according to an evaluation result and based on a preset rule, a swept volume set of the geometric model is obtained, and a hexahedral mesh model of the geometric model is generated according to the swept volume set. The application can automatically evaluate the candidate cutting surfaces in the CAE software, and automatically select the evaluated candidate cutting surfaces for cutting the geometric model. The automatic evaluation and selection of the cutting surfaces improve the efficiency of geometric model cutting and hexahedral mesh generation, reduce the time cost of CAE software simulation pretreatment, improve the simulation efficiency of the mesh model in the CAE, and thus reduce the mechanical product production time cost.

To solve the problem that a clamper is inclined and an insert cannot be accurately fixed.SOLUTION: The cutting tool includes a holder, an insert, a clamp member, and a fixing member. The holder has a bar shape and includes a front end surface, a pocket, a first side surface, a first hole, and a second hole. The clamp member includes a main body and a protrusion. The fixing member includes a shaft portion, a first head portion, and a second head portion. The second head portion is attachable to and detachable from the shaft portion.SELECTED DRAWING: Figure 2

The utility model relates to the technical field of steel pipes, in particular to a staggered welding combined steel pipe. According to the technical scheme, a cylindrical main body matching connection steel pipe is included, and a cylindrical center matching installation hole penetrating through the whole length direction is formed in the center axis position of the main body matching connection steel pipe. The connecting structure is characterized in that main body connecting combined grooves which are evenly distributed in the circumferential direction are formed in the middle of the outer cylindrical face of the main body matched connecting steel pipe, each main body connecting combined groove is of a rectangular structure, and the main body connecting combined grooves are communicated with the center matched mounting hole. The utility model has the advantages that various fastening and matching connection of fastening positions can be realized, the convenience during combination is stronger, the matching application range during connection is wider, the fastening device can be matched with mechanical products of various specifications for use, the overall matching bearing capacity during later use is stronger, and the durability is better.

This invention relates to a method for evaluating the life distribution function of a wind turbine, comprising the following steps: collecting the time of occurrence of a wind turbine failure, the location of the failure (specifically down to the component), the failure mode, and the failure impact, and performing relevant statistical listing; cleaning the collected failure data (t1, t2, ...) to remove outlier data; estimating the parameters of the three distribution functions (exponential distribution function for conventional electronic products, Weibull distribution function for simple mechanical products, and normal distribution function for mechatronic products) using the cleaned data, and fitting the life distribution according to the following mathematical model: taking the distribution function corresponding to the minimum value after fitting the three distribution functions, which is determined as the life distribution function of the wind turbine, and using this life distribution function to evaluate the life of the wind turbine.

An information management system (BC) for managing information indicating the state of a machine product (100), the information management system (BC) comprising: an NFT issuing unit (311) that issues, on a blockchain (300), an NFT (103) associated with individual identification information that identifies the machine product (100); and a management unit (313) that associates a VC (107), which is information indicating the state of the machine product (100), with the NFT.

The invention provides a ball linear guide rail pair limit load calculation method, which comprises the following steps of: 1, establishing a ball-raceway displacement coordination equation of a ball linear guide rail pair, and calculating ball-raceway contact deformation and an actual contact angle under the action of vertical displacement of a sliding block; 2, establishing a relational expression of ball-raceway contact deformation and contact force of the ball linear guide rail pair, and calculating ball-raceway Hertz contact force of the linear guide rail pair; and 3, deducing a limit load calculation formula of the ball linear guide rail pair, and calculating the limit load of the ball linear guide rail pair. By the adoption of the method for calculating the limit load of the ball linear guide rail pair, the limit load of the ball linear guide rail pair can be conveniently calculated, a theoretical method is provided for forward design of the ball linear guide rail pair, and a technical means is provided for model selection of the ball linear guide rail pair in the mechanical product design process; and the method has important significance on the technical progress of pushing the rolling linear guide rail.

The invention relates to an environmental stress screening method considering an aging failure mechanism of a mechanical product. The environmental stress screening method mainly comprises an initial performance detection stage, a high-temperature storage aging stage, a damp-heat aging stage, a high-low temperature circulation stage and an aging performance detection stage. According to the method, the failure mechanism of a mechanical product taking aging as the main failure mechanism and the environmental stress type causing product failure are fully considered, the method for reasonably and accurately eliminating the early failure of the same type of products is formulated, defects / failures of the same type of products caused by processes or materials in the manufacturing and production stage are eliminated, the failure rate of the products is reduced, and the production efficiency is improved. And the product reliability is improved.

The cutting tool according to one mode of the present disclosure comprises: a body which extends from a leading end to a rear end along a rotational axis and which is equipped with a first pocket and a second pocket that are disposed on the side of the leading end; a first insert which is positioned in the first pocket and has a first cutting edge; and a second insert which is positioned in the second pocket and has a second cutting edge. The first insert has a positive axial rake angle, while the second insert has a negative axial rake angle.

The utility model relates to a clamp for positioning and processing an inclined hole of a valve body, and belongs to clamps for positioning and processing inclined holes of mechanical products. The supporting assembly and the indexing vertical plate are fixedly connected with the two ends of the upper surface of the bottom plate respectively, the indexing rotating vertical plate is rotationally connected with the indexing vertical plate through the shaft pin assembly, the long positioning pin is used for positioning the indexing rotating vertical plate and the indexing vertical plate, and the rotating bottom plate is fixedly connected to the supporting assembly and the indexing rotating vertical plate. The positioning plate assembly is fixedly connected to the rotary bottom plate, and the workpiece fixing device is installed on the rotary bottom plate and the positioning plate assembly. The clamp has the advantages that the clamp is novel in structure, compact, practical, accurate and reliable in indexing and positioning and rapid in adjustment, rotation at any angle in the vertical direction by taking 1 degree as a unit can be achieved, indexing and positioning can be rapidly achieved by matching with the requirement of the angle in the horizontal direction, rapid adjustment and switching can be achieved, the adjustment time is greatly shortened, and the production efficiency is improved. And the production efficiency and the trial-manufacturing capability of new products are greatly improved.

A cutting insert according to an embodiment of the present disclosure has an upper surface having a rake face region, a lower surface oriented towards a side opposite the upper surface, a front end surface arranged at one side of the front end and having a clearance region, a rear end surface arranged at one side of the rear end, and a first flow path extending from the front end surface to the rear end surface. The first flow path has a first region extending from the front end surface to one side of the rear end, the inner diameter of which increases with increasing proximity to one side of the rear end, and a second region extending from the rear end surface to one side of the front end, the inner diameter of which increases with increasing proximity to one side of the front end.