Clamping device and machine tool having such clamping device

The utility model relates to a clamping device (510) for clamping a pipe (550) or profile machined on a machine tool (548), having a non-rotatable part (530) and a rotatable part (512) for clamping the pipe (550) or profile, the rotatable part (512) having: a) a chuck (514) with a first clamp (516) and a second clamp (518) for clamping the pipe (550) or profile; b) a first cylinder (526a) in the form of a pneumatic cylinder for tensioning the first clamp (516), the first cylinder (526a) having a first chamber (532) and a second chamber (534), which can be subjected to a first pressure (p1) and a second pressure (p2) independently of one another via a first pneumatic line (A) and a second pneumatic line (B). The utility model also relates to a machine tool having such a clamping device. 本发明涉及一种夹紧装置(510)，用于夹紧在机床(548)上加工的管件(550)或型材，所述夹紧装置具有不可旋转部分(530)和用于夹紧所述管件(550)或型材的可旋转部分(512)，其中，所述可旋转部分(512)具有：a)夹盘(514)，所述夹盘具有用于夹紧所述管件(550)或型材的第一夹钳(516)和第二夹钳(518)；b)用于张紧所述第一夹钳(516)的、呈气动缸形式的第一缸(526a)，其中，所述第一缸(526a)具有第一腔室(532)和第二