This utility model discloses a drilling device for the
tail end of a high-strength bolt, relating to the field of high-strength bolt
processing technology. It solves the problem of workpiece quality being affected by the
machining head's feed motion being out of
sync with the workpiece. The device includes: a countersinking mechanism, comprising a countersinking head, a rotary drive
assembly for controlling the countersinking head's rotation, and a first feed control
assembly for controlling the countersinking head's feed motion; a drilling mechanism, comprising a
drill bit, a rotary drive
assembly for controlling the
drill bit's rotation, and a first feed control assembly for controlling the
drill bit's feed motion; a
punching mechanism, comprising a punch and a second feed control assembly for controlling the punch's feed motion; and a
chip removal mechanism, comprising a milling head, a rotary drive assembly for controlling the milling head's rotation, and a first feed control assembly for controlling the milling head's feed motion. This device ensures that the
machining head's position does not shift, and that the
machining head is coaxial with the workpiece, thereby improving machining accuracy and product quality.