Abstract: This invention relates to a device for the bending and/or distortion-free hardening of bar material, particularly leaf springs, which device has a plurality of frame-shaped tools which upon their closing bend the heated workpiece and lower it in clamped condition into a treatment tank. For the bending and lowering the tools are moved in vertical direction in a portal and discharging from the portal in its lowest position and fed by guide rails of a transport device in a treatment tank. Thereupon the tools are grasped by a lift portal and raised into a position lying above the treatment tank in which position they are opened, the workpiece is removed, and the opened tool is transferred via guide rails of another transport device into a ready position.