Die changer with removable die adapted thereto and die dome as well as method for removing and inserting the removable die

Removable die of a joining tool, wherein the removable die comprises:

• a. a die head having an upper side and a bottom side as well as
• b. a die shaft extending perpendicularly from the bottom side of the die head, wherein a longitudinal extension of the die shaft defines a longitudinal axis of the removable die, and
• wherein the removable die is adapted to be receivable and lockable in a die dome by means of a rotation-free linear inserting movement of the removable die along the longitudinal axis of the removable die,
• wherein the die shaft comprises:
• c. a free end opposite to the bottom side of the die head,
• d. at least one first radial web extending perpendicular to the longitudinal axis of the removable die and forming two axial undercuts, wherein one of the undercuts is formed by an upper side of the at least one first radial web being arranged opposite the bottom side of the die head and, thus, facing the die head, and wherein the other of the undercuts is formed by a lower side of the at least one first radial web being arranged opposite the upper side of the at least one first radial web and, thus, facing away from the die head, so that by means of the at least one first radial web, the die shaft is lockable in the die dome by a rotation-free linear inserting movement of the removable die along the longitudinal axis of the removable die,
• e. at least one second radial web having a radial length, wherein the radial length is adapted to a diameter of the die dome to ensure a lateral guiding of the die shaft in the die dome, and the at least one second radial web is arranged between the die head and the at least one first radial web, wherein the at least one second radial web is formed by a radially tapered axial section at the bottom side of the die head, which radially tapered axial section extends in a direction of the longitudinal axis of the die shaft and the radially tapered axial section is adapted in its radial extension to the diameter of the die dome, wherein the radially tapered axial section is tapered compared to a radial extension of the die head at the bottom side of the die head,
• f. the die shaft further has a radial tapering section attached to or adjoining the at least one second radial web and having a smaller radial extension than the at least one second radial web, the radial tapering section having a side more proximal to the die head and, thus, facing the die head, and the radial tapering section having a side more proximal to the die head and, thus, facing away from the die head, and
• g. the die shaft comprises further a third radial web attached to or adjoining the side of the radial tapering section facing away from the die head, the third radial web being located between the at least one first radial web and the at least one second radial web, wherein
• h. the die shaft extends axially beyond the at least one first radial web towards the free end, and the at least one first radial web is arranged spaced in the axial direction with respect to the third radial web as well as located between the free end and the at least one second radial web, and
• i. an ejection surface by means of which the removable die can be moved out of the die dome, wherein the ejection surface is arranged adjacent to the free end of the die shaft and adjacent to the at least one first radial web.