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Grinding method based on margin constraint condition

A constraint condition and grinding technology, which is applied in the field of grinding and processing of blade parts, can solve the problems such as the difficulty of self-adaptive grinding of CNC abrasive belts, and achieve the effect of easy operation, guaranteeing grinding accuracy and ensuring accuracy.

Active Publication Date: 2019-05-21
CHONGQING UNIV OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a grinding method based on allowance constraints, which can effectively determine the machining reference and machining allowance of parts, and effectively solve the CNC abrasive belt self-adaptive grinding process for parts without reference blades difficult question

Method used

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  • Grinding method based on margin constraint condition

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] The molding process of marine integral propellers generally adopts blank casting without mechanical processing, so there is no processing standard. At the same time, due to the large size, large volume and weight of marine propellers, and the need for multiple processes to complete the processing, this embodiment uses a robot to clamp the grinding head. Subsequent adaptive grinding and polishing of marine propellers, see figure 1 , shows the grinding method based on allowance constraints, which includes the following steps.

[0034] Step 1, use Hexagon GLOBAL SILVER CLASSIC SR 05.07.05 contact type three-coordinate measuring machine to test it. According to the propeller point cloud data obtained by detection, using NX8.5 three-dimensional modeling software, the three-dimensional non-uniform rational B-spline curve surface algorithm i...

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Abstract

The invention discloses a grinding method based on a margin constraint condition. The method comprises following steps: step one, acquiring three-dimensional measurement data of a part, and reverselyreconstructing a reconstruction model of the part according to the three-dimensional measurement data; step two, performing initial matching to obtain an initial transformation matrix from the reconstruction model to a theoretical model; step three, performing accurate matching, completing accurate matching of the reconstruction model and the theoretical model through iterative operation, and obtaining machining reference and machining allowance of the part; step four, setting grinding parameters according to the machining reference and machining allowance which are obtained in step three, andgrinding the part. According to the method, the machining reference and the machining allowance of the part can be effectively determined, and the problem of difficulty in a numerical control abrasive belt self-adaptive grinding technology of reference-free blade parts is effectively solved.

Description

technical field [0001] The invention relates to the grinding process of blade parts, in particular to a grinding method based on margin constraints. Background technique [0002] The airfoil profile and tenon edge plate of non-standard blade parts are generally not machined, so in the actual CNC abrasive belt adaptive grinding process, the processing benchmark cannot be determined by its tenon and other parts. Subsequent grinding of such non-standard blade parts has been processed by manpower before, and the manpower processing method is not only inefficient, poor in consistency, and low in yield, which cannot meet the processing needs of such parts, but also the working environment It is harsh and labor-intensive, which is not conducive to the health of employees. In recent years, it is a development trend to process such non-reference blade parts by CNC abrasive belt adaptive grinding, and in the process of adaptive grinding, the determination of the processing reference ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B1/00
Inventor 张明德谭依泞沈智军
Owner CHONGQING UNIV OF TECH
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