通过交替使用的工具（WZ）加工保持在夹紧装置中的金属部件的装置，该工具可通过顺序自动控制加工步骤从刀库（14）中取出 。 该装置还包括一个工具主轴更换装置和一个工具更换装置，该工具更换装置包括一个可移动的，可旋转和可枢转的夹具（ZQ），夹具（28,29）可以在主轴轴线上进行调节。 （Z）取下刀具和主轴轴。 该装置还包括一个轮廓（30），其形状对称下颌以容纳工具（WZ），包括分别干锥体的至少两种不同尺寸的，具有至少三个部分（A，B，d）的形式 它们的辐条（ERa，ERb，ERd）分别适用于至少三个棒尺寸或锥体的不同直径，并且相应的工具销（10）， 将处于工作位置的工具引入到安装装置中，从该安装装置中可以将其取出并用可用于备用位置的工具销（11）替换。 夹爪（28,29）的至少三个弧形部分（a，b，d）与其圆心（Ma，Mb，Md）为 位于与供给和排出轴（x）相交的开口弧（KB）上。 发电弧的发生中心（MKB）与夹爪（28,29）的中心（D）重合。

Device for machining a metal workpiece held in a clamping dispostif, with tools (WZ) can be used alternately out of a tool magazine (14) with a sequential automatic control of machining steps . This device also comprises a tool spindle changing device and a tool change device consisting of a clamp (ZQ) movable rotatably and pivotally whose jaws (28, 29) can be adjusted on the axis of sampling tools and the axis of the respective pin (Z). The device further comprises a contour (30) profiled symmetrically jaw to accommodate the tools (WZ), comprising at least two different sizes of stem cone respectively, having at least three sections (a, b, d) form of arc, connected to each other, whose radii (ERa, ERb, DRE) is adapted to the different diameters of at least three sizes of rod or cone, respectively, and for which the respective tool spindle (10), which is in the working position, is inserted into a mounting device where it can be extracted and replaced by a tool spindle (11) provided in a reserve position. The three sections (a, b, d) at least in the shape of a circular arc, the jaws (28, 29) are spaced apart (f) of the corresponding generators arc whose circle centers (Ma, Mb, Md) are located on an open arc (KB) intersecting the feed and discharge axis (x). The generator center (MKB) generators arcs coincide with the center (D) of the gripper jaws (28, 29).