US 12,011,755 B2
Punch unit for punching machine
Stefano Saggin, Sarego (IT); Diego Figatti, Sarego (IT); and Giovanni Dalla Costa, Sarego (IT)
Assigned to SALVAGNINI ITALIA S.P.A., Sarego (IT)
Appl. No. 17/430,091
Filed by SALVAGNINI ITALIA S.P.A., Sarego (IT)
PCT Filed Feb. 11, 2020, PCT No. PCT/IB2020/051071
§ 371(c)(1), (2) Date Aug. 11, 2021,
PCT Pub. No. WO2020/165753, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 102019000002039 (IT), filed on Feb. 12, 2019.
Prior Publication US 2022/0143673 A1, May 12, 2022
Int. Cl. B21D 28/34 (2006.01); B26F 1/04 (2006.01); B26F 1/14 (2006.01)
CPC B21D 28/34 (2013.01) [B26F 1/04 (2013.01); B26F 1/14 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A punch unit associable with a respective punch holder of a punching machine to form a punch assembly, the punch unit comprising a punch tip holder mountable on the respective punch holder and a punch tip housed in, and connected to, said punch tip holder in an assembled configuration, said punch tip holder including:
a connecting element coupled to said punch tip;
an adapter element shaped and sized so as to be inserted and housed in the respective punch holder and provided with an inner cavity suitable to house said connecting element with said punch tip in the assembled configuration; and
a locking device housed in said adapter element, said locking device being configured to be operated manually without tools and arranged for locking or unlocking said connecting element with said punch tip to or from said adapter element,
wherein said connecting element comprises a first end, which is configured to be coupled to an actuating element of the respective punch holder, and an opposed second end, which is configured to be coupled to a connecting portion of said punch tip,
wherein said first end of said connecting element comprises a first threaded seat suitable to receive a fastening element of the actuating element, and
wherein said opposed second end of said connecting element is configured to be inserted and fixed by threaded coupling to a second threaded seat of said connecting portion of said punch tip.