The invention relates to the technical field of tool changing mechanisms, in particular to a tool changing mechanism capable of preventing side inclination during tool loosening and a control method thereof.The tool changing mechanism comprises a tool changing arm
assembly, a first power
assembly used for supporting and driving the tool changing arm
assembly to rotate and a second power assembly used for loosening the tool of the tool changing arm assembly; the tool changing arm assembly comprises a tool apron, a
flange plate, two tool claw sets and a tool loosening structure, the
flange plate is arranged at the rear end of the tool apron, the two tool claw sets are arranged at the front end of the tool apron, the tool loosening structure corresponds to the tool claw sets and comprises a sleeve, a locking shaft and an elastic piece, and the elastic piece enables the locking shaft to penetrate through the tool apron to lock tools of the tool claw sets. And the second power assembly reversely pulls the locking shaft to move so as to loosen the cutter. Through the arrangement of the tool apron, the
flange plate and the tool loosening structure, the stability of the overall structure of the tool changing arm is enhanced, the anti-roll capacity is improved, the tool loosening mode that the second power assembly pulls the locking shaft is utilized, it is ensured that the tool changing arm loosens the tool stably, and the tool
collision risk caused by roll is effectively reduced.