Abstract: The invention relates to a fixing mechanism for a tool for treatment of a material, such as machining. The fixing mechanism comprises a combination of a tool (1), its frame (2) and tool holder (3) in the frame of a machine tool. At least one of the connecting surfaces (r, 7) in the tool frame (2) and in the tool holder (3) in the frame of the machining tool, extending mainly in the mounting direction, is shaped as a curved surface. The first contact surface (6) in connection with the tool frame (2) and the second contact surface (8) in the tool holder (3) are adjusted substantially in a direction perpendicular to the mounting direction, to be placed against each other in the operational position of the fixing mechanism, in order to transmit machining force between the tool frame (2) and the tool holder (3).
Abstract: The invention relates to a method and apparatus for adjusting the width of the bending jaws in a bending machine. The total width (L) of the bending jaws is formed by using jaw parts and edge pieces in the following manner:a first set (R.sub.1) is elected to form a group of jaw parts of different widths for so-called fine adjustment, one at a time (R.sub.1n) being at the operational point (T) of the bending jaws,a second set (R.sub.2) is elected to form a group of jaw parts with identical width and to be separate from the edge pieces (RK.sub.1, RK.sub.2) for so-called coarse adjustment, wherein the width of the bending jaws required at a time is elected according to the equationL=R.sub.1n +N * R.sub.2i +C,whereinL=the width of the bending jaws,R.sub.1n =the width of the jaw part (n=0 . . . M) elected from the first set (R.sub.1),N=the width of the jaw parts of the second set (R.sub.2), i.e. a constant,R.sub.2i =the number (i=0 . . . k) of jaw parts of the second set (R.sub.