3 results about "Tolerance optimization" patented technology

The invention provides a flange pipeline multi-source coupling error prediction, regulation and control method and device. The flange pipeline multi-source coupling error prediction, regulation and control method comprises the steps that a multi-source error coupling model is constructed based on structure parameters and precision parameters of a flange pipeline; constructing an assembly error migration accumulation model based on the Jacobian matrix and the multi-source error coupling model; a Halton low-difference sequence is adopted to generate random assembly errors meeting spinor constraints, iterative simulation is conducted on the assembly error migration accumulation model, and a prediction accumulation assembly error simulation result is obtained; when the result meets the expected function requirement, updating and reconstructing the assembly error migration accumulation model based on the measured data, and predicting the assembly error of the flange pipeline system based on the reconstructed assembly error migration accumulation model; and when the result does not conform to the expectation, an optimal tolerance allocation scheme is obtained. According to the method, the error sources of flange pipeline assembly are classified and represented, the tolerance optimization model is provided to realize reasonable distribution of tolerance parameters, and the assembly prediction precision and the assembly success rate are improved.

The invention relates to the technical field of high-precision building simulation analysis for digital assembly, and discloses a high-precision building simulation analysis method and system for digital assembly, which comprises a high-precision building simulation analysis method and a high-precision building simulation analysis system for digital assembly. The key technical bottlenecks that in the prior art, the assembly precision depends on artificial experience, tolerance distribution lacks an optimization basis, errors cannot be controllably accumulated and the like are overcome, precision modeling and data structured expression of the whole assembly process are achieved, the error propagation simulation capacity based on a statistical method is provided, a performance-oriented assembly precision evaluation mechanism is established, and the assembly precision evaluation efficiency is improved. A closed-loop tolerance optimization and parameter feedback control path is constructed, and the predictability and the digital control level of the assembly process are remarkably improved.

This invention proposes an example-based tolerance optimization method and system for locking and unlocking mechanisms, belonging to the field of intelligent firearms manufacturing. The method optimizes the tolerance design of the locking and unlocking mechanism by comprehensively considering processing costs and process capability indices while ensuring qualified assembly accuracy. Based on a tolerance example library of locking and unlocking mechanisms, the method constructs optimization objectives for product processing costs and quality losses through contribution analysis and calculation. It establishes an objective optimization model with process capability indices and tolerance accumulation as constraints, achieving a balance between processing costs and assembly quality losses. This invention can meet the design accuracy requirements of precision manufacturing, improve production efficiency, enhance part quality, and further reduce production costs.