Digitization mechanical design method

Abstract

The invention discloses a precise-design high-efficiency designing method of digital machine, which is characterized by the following: finishing three-dimensional modeling of element based on superior CAD software platform; forming digital prototype through virtual assemblage; realizing structure optimizing design of combined harvester with longitudinal axial flow through analyzing and optimizing the property of digital prototype; manufacturing the element according to optimized three-dimensional model of digital prototype; proceeding virtual test and preparation of product under digital condition; realizing precise design; reducing the modification of project greatly; saving large quantity of working model and preparing time.

Description

technical field [0001] The invention relates to a mechanical design method, in particular to a digital mechanical design method. Background technique [0002] At present, most machinery manufacturing enterprises use years of imitation and experience for structural design. Designers draw two-dimensional engineering drawings of parts based on the three-dimensional models in their minds, and then production personnel restore them into three-dimensional models based on the two-dimensional engineering drawings in their minds. Processing and production, this process not only easily leads to errors in the transmission of design information, resulting in waste products, but also leads to the extension of the production cycle. After the processing and production of the prototype parts are completed, the assembly and performance experiments are carried out. In this process, no matter which link has an error or does not meet the design conditions, it must be returned to the designer fo...

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Problems solved by technology

The defect of this design method is that the determination of the structural parameters largely depends on the experience of the designer, which is very random, and the quality of the design results can only be known after the trial production of the product prototype.

[0004] Most of the existing axial flow threshing devices follow the basic formula of the tangential flow threshing theory proposed by Lourier et al., which defaults the movement speed of the grain in the threshing space to be equal to the peripheral speed of the drum, while the measured average movement speed of the grain is only It is 20% to 30% of the peripheral speed of the drum; in addition, it is assumed that the quality of the grain remains unchanged when it moves from the entrance to the exit in the threshing space, but in actual production, with the progress of the axial flow threshing process, it accounts for a large part of the grain quality. Kernels are constantly separated from the concave plate, so the mathematical model based on the idea of ​​constant mass is not convincing

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