Internal cooling key pulling tool

• Main Authors: LI JIQUAN, ZHANG XINLIN, RUAN JIAYOU, GUO SONGLIN, GUO DAHAI, YANG MENGHU
• Format: Patent
• Language: Chinese; English
• Published: 05.08.2022
• Subjects: BROACHING; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT; DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING; FILING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR; MACHINE TOOLS; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; PLANING; SAWING; SCRAPING; SHEARING; SLOTTING; TRANSPORTING

An internal cooling broaching tool relates to the technical field of broaching of internal flat keys of parts and comprises a connecting sleeve, a mandrel and two water inlet pipes, the front end of the mandrel is inserted into the connecting sleeve, and an upper broaching groove and a lower broaching groove are formed in the inner wall of the connecting sleeve and the outer wall of the mandrel respectively; two longitudinal channels in the axial direction of the core shaft are symmetrically formed in the positions, close to the two groove walls of the pull-down groove, in the core shaft, two chamfered inclined planes are symmetrically arranged at the top ends of the two groove walls of the pull-down groove, and a plurality of water outlet holes are formed in the chamfered inclined planes in the axial direction of the core shaft; two radial through holes penetrating to the inner wall of the connecting sleeve are symmetrically formed in the positions, corresponding to the two sides of the pull-down groove, of