Expansion mandrel for repairing hob

• Main Authors: ZHANG LIANG, LUO GUIQUAN
• Format: Patent
• Language: Chinese; English
• Published: 03.02.2023
• Subjects: BORING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; TRANSPORTING; TURNING

The utility model relates to the field of expansion mandrels, and discloses an expansion mandrel for repairing a hob, which comprises a mandrel main body, and a connecting flange, a boss and an expansion sleeve which are sleeved on the outer wall of the mandrel main body, the connecting flange is positioned on the left side of the boss, the expansion sleeve is positioned on the right side of the boss, and the inner wall of the expansion sleeve is in threaded connection with a locking bolt. The outer surface of the left side of the locking bolt is hermetically connected with a cushion, a hydraulic adjusting bolt is fixedly mounted on the inner wall of the locking bolt, and a gland is welded to the right side of the locking bolt. According to the expansion mandrel for repairing the hobbing cutter, looseness between the mandrel body and the connecting flange is prevented through the boss, hydraulic oil enters the locking bolt after entering the mandrel body, the inlet and outlet speed of the hydraulic oil is adj