Tapered Cutting Tool Assembly to Prevent Heat-Induced Loosening

The patent changes the attachment mechanism from thermal deformation (shrink fitting) to mechanical deformation. The tapered surfaces are pressed together through plastic deformation using a pressing device, creating a firm mechanical interlock that is not affected by subsequent thermal expansion during processing. This parameter change from thermal to mechanical deformation resolves the contradiction between ease of assembly and attachment stability under heat.

The patent replaces the thermal-mechanical attachment system (shrink fitting relying on thermal contraction) with a direct mechanical deformation system. The tapered surfaces are mechanically pressed together to create plastic deformation and firm contact, establishing a rigid connection that maintains attachment firmness even when the head undergoes thermal expansion during high-rigidity rotation operations.

The patent changes the deformation parameter from thermal to mechanical, pressing the tapered surfaces together to create permanent plastic deformation. This mechanical deformation method establishes precise surface contact and firm attachment that maintains manufacturing precision throughout processing, eliminating the accuracy deterioration caused by thermal expansion and contraction cycles in traditional shrink fitting methods.