公开(公告)号：US20250041949A1

公开(公告)日：2025-02-06

申请号：US18228430

申请日：2023-07-31

Applicant: Kennametal Inc.

Inventor： Ruy Frota de Souza Filho ,  Austin Baer ,  Dominik Smidt

IPC: B23B31/30

Abstract: A hydraulic chuck assembly includes a tool support member having an axial bore. An expansion sleeve is received within the axial bore of the tool support member. The expansion sleeve comprises an inner surface, an outer surface and a front flange extending radially outward from the outer surface. A primary pressure chamber is formed between the axial bore of the tool support member and the outer surface of the expansion sleeve. A flexibility of the expansion sleeve is increased by removing material from the expansion sleeve in a vicinity of a front braze ring and a rear braze ring, thereby decreasing a maximum stress in the front braze ring and the rear braze ring. The material is removed by undercuts that form secondary pressure chambers in fluid communication with the primary pressure chamber.