Cutting force model modeling method considering main shaft thermal error and tool bounce

Abstract

The invention discloses a cutting force model modeling method considering a main shaft thermal error and tool bounce. The method comprises the following steps: 1) establishing a cutting force theoretical model under ideal conditions; 2) considering tool bounce, and solving a cutter shaft offset distance rho and a cutter shaft offset angle phi ro caused by the tool bounce; 3) considering the thermal error of the main shaft, correcting the cutter shaft offset distance rho and the cutter shaft offset angle phi ro by the thermal error of the main shaft in a thermal balance state to obtain a corrected cutter shaft offset distance rho1 and a corrected cutter shaft offset angle phi r1, and correcting the cutting force theoretical model by the cutter shaft offset distance rho1 and the cutter shaft offset angle phi r1 to obtain a cutting force model considering the cutter bounce and the thermal error. According to the cutting force model considering the main shaft thermal error and the tool bounce and the modeling method of the cutting force model, the influence of the main shaft thermal error and the tool jump on the cutting force is considered, so that the actual machining condition can be better met.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, in particular to a cutting force model modeling method considering the thermal error of the spindle and the beating of the tool. Background technique [0002] Existing cutting force studies are generally predicted under ideal conditions, that is, the shape of the tool is strictly centrosymmetric and rotates around its axis, and the material removal process does not have any influence on the shape of the tool. For example, the Chinese patent application with the publication number CN 113536543 A discloses a cutting force modeling method for micro PCD milling tools without side edge relief angle, and the Chinese patent application with the publication number CN 113297696 A discloses a method based on semi-analytic method. The modeling method of the static milling force of the ball end milling cutter, these cutting force modeling methods are all realized under the ideal conditions of c...

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Problems solved by technology

For example, the Chinese patent application with the publication number CN 113536543 A discloses a cutting force modeling method for micro PCD milling tools without side edge relief angle, and the Chinese patent application with the publication number CN 113297696 A discloses a method based on semi-analytic method. The modeling method of the static milling force of the ball end milling cutter, these cutting force modeling methods are all realized under the ideal conditions of cutting processing, however, in actual processing, the tool will jump, and the spindle will also run after a long time Thermal errors, tool jump and spindle thermal errors will lead to cheap tool shafts, resulting in changes in cutting forces. The existing cutting force modeling methods cannot meet the cutting force prediction requirements of actual machining

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