Process model generation method and apparatus for sheet metal process

Abstract

The invention discloses a process model generation method and apparatus for a sheet metal process. The method comprises the steps of generating a design model of a bending state of a sheet metal part; based on the design model of the bending state, generating multiple continuous bending fit lines of an external profile of the sheet metal part; according to the bending fit lines, generating a bending process model of the sheet metal part and performing process information labeling; and according to preset process parameters, processing an expanded bending process model to generate process state models of the sheet metal part, and performing process information labeling, wherein the process state models include a discharge state model and an edge milling state model. According to the process model generation method and apparatus, automatic fit lineation of the sheet metal part can be realized; the process state models including the bending process model, the discharge state model, the edge milling state model and the like can be automatically generated and the process information labeling is performed; the parameterization, normalization and standardization of a technological design process of the sheet metal part are realized; and the technological design efficiency is improved, so that the workload of manual lineation is reduced and the preparation cycle of a sheet metal manufacturing process is shortened.

Description

technical field [0001] The invention relates to the technical field of sheet metal process design, in particular to a method and device for generating a process model of a sheet metal process. Background technique [0002] Sheet metal is a comprehensive cold processing process for metal sheets, including blanking, milling, bending, riveting, splicing and other processes. Continuous fitting bending sheet metal parts refer to large sheet metal parts that cannot be formed at one time with the given bending equipment processing capacity. The processing and forming process requires multiple bending processes to achieve the required precision requirements. At present, the process design of this type of sheet metal parts mostly adopts a two-dimensional method, that is, using two-dimensional drawing software to manually draw the process drawings of each processing state, including blanking diagrams, milling diagrams, bending diagrams and expansion diagrams, the process design cycle ...

AI Technical Summary

Problems solved by technology

At present, the process design of this type of sheet metal parts mostly adopts a two-dimensional method, that is, using two-dimensional drawing software to manually draw the process drawings of each processing state, including blanking diagrams, milling diagrams, bending diagrams and expansion diagrams, the process design cycle It is relatively long, especially the design process of the bending diagram needs to manually draw the fitting bending line, the marking process is complicated and the accuracy is not high, and the line can only be divided equally with a single step value each time, and when the step value is adjusted again , heavy workload for repeated operations, and low design efficiency

In addition, there is no correlation between the blanking diagram, edge milling diagram, bending diagram and unfolding diagram produced by manual drawing using two-dimensional drawing software, and cannot be automatically associated and changed, and cannot accurately guarantee the consistency of process design information among various graphics Not conducive to data maintenance and management

Although the sheet metal structure design based on the 3D environment has been carried out, it can realize the associated expression problem of the 3D structure design model of the sheet metal and the corresponding unfolded model, but for the sheet metal parts, especially the continuous fitting and bending sheet metal parts, due to its process design In the process, there are many intermediate forming times of sheet metal parts, which require multiple bending operations. When designing sheet metal structures in a 3D environment, designers cannot quickly build a 3D model of a sheet metal part that contains multiple fitting bending features. It is still difficult to effectively solve the problem of rapid process design of this type of sheet metal parts by directly using the three-dimensional structure design model of sheet metal

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