Whole machine static stiffness matching and designing method in view of machine tool top-down design

Abstract

The invention discloses a whole machine static stiffness matching and designing method in view of machine tool top-down design. The method comprises steps: static stiffness of each part of the machine tool in a difference place is defined; a static stiffness model for the whole machine is built; force analysis is carried out on each part of the machine tool, a force condition of each part is obtained, and normal forces and tangential forces of the machine tool body, a vertical column and a slide carriage are obtained through analysis; a function relation between deformation of each part of the machine tool and static stiffness of each part of the machine tool is built; the static stiffness model for the whole machine is built; and on the basis of the static stiffness model for the whole machine, static stiffness matching and designing are carried out. In the machine tool concept design stage, the whole machine static stiffness given by a user serves as a target, machine tool static stiffness design is carried out in a top-down mode, and in the condition in which static stiffness in three directions at the tail end of the whole machine tool is given, reasonable static stiffness for each part is obtained through matching and designing. The static stiffness of the machine tool can be estimated and controlled at the beginning of the design, the efficiency and the accuracy of design are improved, the processing precision of the machine tool is improved, product performance estimation can also be carried out, and the production cost and the manufacturing cost are reduced.

Description

technical field [0001] The invention relates to a static stiffness matching design method of a complete machine. In particular, it relates to a machine tool static stiffness matching design method for forward design. Background technique [0002] Static stiffness is one of the important indicators of machine tool design. Improving the static stiffness of the machine tool is conducive to improving the efficiency, machining accuracy and surface processing quality of the machine tool. In the previous machine tool design, the static stiffness was usually calculated by finite element software after the machine tool structure design was completed. The designed machine tool structure often cannot meet the user's requirements for the static stiffness of the whole machine, resulting in repeated revisions and calculations by designers during the design process, wasting a lot of time and manpower. In addition, designers cannot control the static stiffness of the whole machine at the ...

AI Technical Summary

Problems solved by technology

The designed machine tool structure often cannot meet the user's requirements for the static stiffness of the whole machine, resulting in repeated revisions and calculations by the designer during the design process, wasting a lot of time and manpower

In addition, designers cannot control the static stiffness of the whole machine at the beginning of the design, and there is no effective estimation method for it

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