Punch press, method of replacing punch and die for punch press, and punch system

A punch press, comprising:

• an upper portion main shaft provided to be movable vertically and rotatable, the upper portion main shaft supporting a punch such that the punch is configured to be attached, detached and exchanged, the upper portion main shaft being provided with:
• a punch damper that includes lock claws having a spherical portion at a distal end thereof configured to vertically slide between a broad step portion at a lower end portion of a lower portion space of the upper portion main shaft and to elastically grasp the punch in a manner such that the spherical portion of the lock claws are moved inwardly by the step portion;
• and
• a plate presser supporting member movable vertically and configured to support a plate presser, the upper portion main shaft being provided with a fluid pressure cylinder coupled to and configured to vertically move the plate presser supporting member;
• a lower portion main shaft provided to be movable vertically and rotatable, the lower portion main shaft supporting a die corresponding to the punch such that the die is configured to be attached, detached and exchanged, and the lower portion main shaft being provided with a fluid pressure cylinder configured to push the die up, and a piston rod in the fluid pressure cylinder is formed in a hollow shape configured to abut a lower face of the die;
• a punch exchanging apparatus is configured to reciprocate between a punch accommodating section which accommodates the punch and the upper portion main shaft positioned at the punch exchanging height position;
• and
• a die exchanging apparatus is configured to reciprocate between a die accommodating section which accommodates the die and the lower portion main shaft positioned at the die exchanging height position,
• wherein
• the upper portion main shaft is configured to ascend from a working height position, to perform press working on a work, to a punch exchange height position, to perform punch attaching, detaching and exchanging,
• the lower portion main shaft is configured to descend from a working height position, to perform press working on a workpiece, to a die exchange height position, to perform die attaching, detaching and exchanging,
• the punch press is configured to simultaneously detach and attach the punch and die, and
• when the die exchanging apparatus is moved in one direction to a punch and die set attaching portion, holding a punch and die set supported by the punch and die set attaching portion with the punch and die set exchanging apparatus to detach the punch and die set from the punch and die set attaching portion and sequentially attaching a new punch and die set prepared and held by the punch and die set exchanging apparatus to the punch and die set attaching portion.