The present invention refers to a positioning and blocking device (1) for positioning and blocking a piece (P) with respect to a working table (WT).
In particular, said device (1) comprises: a body (10) with a head (11), blocking means (111) for blocking said piece (P), arranged on said head (11), a first opening (101), arranged on said body (10) to be connected, when said device (1) is in use, to a vacuum generating device (D), a second opening (102) arranged on said head (11), a first duct (13), which extends between said first opening (101) and said second opening (102), an abutment element (15), movable between a rest position and an operative position, as well as a second duct (14) connected to said abutment element (15). When a vacuum is generated in the first duct (13), said blocking means (111) assume said second condition and said abutment element (15) passes from the operative position to the rest position.
The present invention also refers to a method for positioning and blocking a workpiece (P) on at least one positioning and blocking device (1) and to a machine tool for machining said piece (P).