Shear thickening effect-based milling chatter suppression and deformation control method for thin-wall part

Abstract

The invention discloses a shear thickening effect-based milling chatter suppression and deformation control method for a thin-wall part. The method comprises the following steps that: a shear thickening liquid is prepared; a thin-wall part to be machined is fixed to a workbench of a machine tool through a clamp; the side, opposite to a machining face, of the thin-wall part to be machined, is filled with the shear thickening liquid, and the shear thickening liquid makes contact with the opposite face of the machining face; and a numerical control milling center is started to machine the thin-walled part through a hard alloy cutter, a milling mode is a smooth milling mode, after machining is completed, the part is taken out and cleaned, and the whole machining process is completed. According to the method, the unique rheological mechanical property of the shear thickening fluid is applied to milling of the thin-wall part, under the impact action of milling dynamic load, the thickening effect of the shear thickening fluid greatly improves the rigidity of the thin-wall part, the damping in the milling process is increased, and milling chatter suppression and machining deformation control of the thin-walled part can be realized at the same time.

Description

technical field [0001] The invention relates to a thin-walled part chatter vibration and processing deformation control method, in particular to a thin-wall part milling chatter suppression and processing deformation control method. Background technique [0002] Due to the low rigidity of thin-walled parts, milling stability has a great influence on its processing quality during milling. Unstable milling process, that is, flutter causes thin-walled parts to produce machining chatter marks during the processing process, accelerates tool wear, and seriously affects the surface quality of the workpiece, such as surface roughness, machining residual stress, etc. Severe chatter can even lead to termination. Even in a stable cutting state, due to the small thickness and low rigidity of the thin-walled parts, the workpiece generates a large vibration displacement under the action of periodic milling force, resulting in over-cut or under-cut phenomenon and reduced machining accurac...

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Problems solved by technology

[0004] 1. Research on milling vibration usually does not consider forced vibration, but mainly focuses on chatter suppression;

[0005] 2. In the research on the deformation of thin-walled parts, it is usually assumed that it is carried out in a stable cutting interval, and the method of reducing deformation does not consider whether it will affect the chatter of thin-walled parts;

[0006] The rigidity of thin-walled parts is low, and the influence of dynamic milling vibration on processing deformation and processing quality during processing cannot be ignored. Independently solving chatter or reducing processing deformation may lead to one thing at the expense of another, which is not conducive to the improvement of thin-walled parts processing quality

In the existing methods, there is no report on the use of shear thickening effect to suppress the milling chatter of thin-walled parts and reduce the deformation of thin-walled parts.

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