A heavy-duty machine tool assembly method that suppresses the negative migration of assembly accuracy

Abstract

An assembly method of a heavy machine tool that suppresses the negative transfer of assembly accuracy, and relates to an assembly method of a heavy machine tool. The invention aims to solve the problem that the existing assembly method cannot realize the effective control of the migration of the assembly precision of the machine tool. Using the influence characteristics of the assembly method of each process in the assembly process on the assembly accuracy, a migration characterization method of assembly accuracy is proposed; the mapping relationship between the deformation field of the machine tool and the assembly accuracy index is established; the assembly accuracy index matrix of the machine tool, the characteristic variable matrix of the deformation field and the It correlates with the transformation matrix and proposes a method for predicting the migration of machine tool assembly accuracy; adopts the redistribution response surface method of machine tool assembly deformation field to construct the control variable matrix of machine tool assembly accuracy migration and its response transformation matrix; constructs the hierarchical structure of influencing factors for assembly accuracy migration; proposes The identification method of assembly precision migration type is proposed, and the control method of assembly precision migration is proposed; the design method of machine tool assembly process is proposed. The invention is used for the assembly of heavy machine tools.

Description

technical field [0001] The invention relates to a method for suppressing the negative migration of assembly accuracy of heavy machine tools, in particular to a method for characterization of assembly accuracy migration of heavy machine tools, a prediction method for assembly accuracy migration of heavy machine tools, a method for identifying migration of heavy machine tool assembly accuracy, and a method for the migration of assembly accuracy of heavy machine tools The control method and the assembly process design method are used to assemble a heavy-duty turning and milling machine tool for processing large-scale nuclear power parts; it belongs to the technical field of heavy-duty machine tool assembly. Background technique [0002] Heavy-duty machine tools have the characteristics of large tonnage, complex structure, large assembly load, and difficult transportation. After the initial assembly accuracy test is passed, it needs to be disassembled into several types of compon...

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Problems solved by technology

[0005] In order to solve the problem that the existing heavy-duty machine tool assembly method does not consider the mapping relationship between the deformation field and the assembly accuracy in the repeated assembly process of the heavy-duty machine tool, there is ambiguity in the redistribution of the deformation field caused by the existing machine tool assembly and its influence mechanism on the assembly accuracy and uncertainty, it is impossible to effectively control the migration of machine tool assembly accuracy, and provide a heavy-duty machine tool assembly design method that suppresses the negative migration of assembly accuracy

[0008] Step 1: Aiming at the deficiencies of the existing methods for solving machine tool assembly accuracy out-of-tolerance, reveal the formation process of machine tool assembly accuracy migration, and then ascertain the formation process and types of heavy-duty machine tool repeated assembly accuracy migration, and propose a characterization method for heavy-duty machine tool assembly accuracy migration , to obtain the different types formed by the positive migration, negative migration and mutual transformation of assembly accuracy in each process of the machine tool;

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