A method for material forming and/or cutting by means of a tool and a drive unit. The method includes moving the drive unit to provide kinetic energy to the tool, for the tool to strike a work material, so as to form and/or cut the work material when the tool is operatively disassociated from the drive unit before the tool strikes the work material.

A method for material forming and/or cutting by means of a tool and a drive unit. The method includes moving the drive unit to provide kinetic energy to the tool, for the tool to strike a work material, so as to form and/or cut the work material when the tool is operatively disassociated from the drive unit before the tool strikes the work material.

The invention relates to an apparatus for material forming, by means of a tool (41) and a drive unit (2), the apparatus being arranged to move the drive unit (2) to provide kinetic energy to the tool (41), for the tool (41) to strike a work material (W), so as to form the work material (W), the apparatus being provided with an impact head (4″) between the drive unit (2) and the tool (41), and the apparatus being arranged to provide the kinetic energy to the tool by the drive unit (2) striking the impact head (4″), wherein at least a region of the impact head (4″) is allowed to move in relation to the tool (41) laterally to a direction of the stroke of the drive unit, whereby the impact head is arranged to expand laterally in relation to the tool. The invention also relates to a method for material forming.

A hydraulic forming machine, includes a hydraulic cylinder with a piston guided in a cylinder tube and divides the cylinder tube into a first cylinder chamber, and a second cylinder chamber. A hydraulic circuit with a control unit for controlling the operation of the hydraulic cylinder includes a first hydraulic valve coupled to the control unit and is connected to the second cylinder chamber via the second hydraulic connection. The control unit regulates an opening width of the first hydraulic valve such that the first hydraulic valve is open in a first phase and the bear) is accelerated to a target speed in the first phase, while, in a following second phase the opening width of the first hydraulic valve is reduced to an inflow opening width, and the first hydraulic valve is closed during a return stroke running in the opposite direction to the working stroke.