Global deformation simulation method suitable for plane milling multi-step process

A simulation method, multi-step technology, applied in design optimization/simulation, instrumentation, electrical digital data processing, etc.

Pending Publication Date: 2020-05-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is the transfer and cumulative calculation of non-uniform global deformation in the multi-step process

Method used

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  • Global deformation simulation method suitable for plane milling multi-step process
  • Global deformation simulation method suitable for plane milling multi-step process
  • Global deformation simulation method suitable for plane milling multi-step process

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Embodiment Construction

[0038] The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

[0039] In the drawings, components with the same structure are denoted by the same numerals, and components with similar structures or functions are denoted by similar numerals. The size and thickness of each component shown in the drawings are shown arbitrarily, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of parts is appropriately exaggerated in some places in the drawings.

[0040] The present invention first determines the reference checkerboard space of the surface of the workpiece to be processed, and...

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Abstract

The invention discloses a global deformation simulation method suitable for a plane milling multi-step process. The invention relates to the field of milling deformation calculation. The method comprises the steps of rasterizing the surface of a workpiece; constructing a workpiece surface reference chessboard space; and then converting the surface point cloud calculated in each step of positioning, clamping, milling and releasing into a reference chessboard space expression quantity according to a chessboard expression method of a fixed space grid reference, and finally realizing calculation of final global deformation of the multi-step milling surface through numerical accumulation calculation of point cloud variables with the same reference chessboard space. According to the method, coordinated analysis of non-homologous surface error point clouds in the multi-step process is achieved, transfer and accumulation calculation of non-uniform global deformation in the multi-step process is well achieved, and the method is suitable for multi-step global deformation calculation of complex workpieces, especially multi-hole surfaces with unknown surface geometric equations.

Description

technical field [0001] The invention relates to the field of milling deformation calculation, in particular to a global deformation simulation method suitable for the multi-step process of plane milling. Background technique [0002] Large-size multi-tooth disc milling cutters are usually used for end face milling of complex porous workpieces, such as engine block, cylinder head, transmission valve body end face processing, due to the uneven deformation of the tool at different times and different milling positions during the milling process As a result, the surface of the processed workpiece presents a global deformation problem of "sag in the middle and warping of four sides", which affects the quality of the processed surface. The description method using a single point or a few key points cannot fully reflect the non-uniform distribution characteristics of the global deformation. Therefore, the most comprehensive way to express the non-uniform global deformation presente...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/17G06F119/14
Inventor 金隼刘顺
Owner SHANGHAI JIAO TONG UNIV
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