The platen of various machine tools, heavy machine platen, and a variety of machining special aids. All platen overall are 45 # carbon steel forged. By special heat treatment processing. Parallel platen Note parallel platen'' the> parallel platen Note parallel platen workpiece clamping methods used in the milling machine, horizontal milling machine, with the end mill milling up. When the workpiece is installed parallel to the platen in the milling machine, the machine tool with the tool is relatively simple, the main machine platen''> machine platen, Horn, T-bolts (or T-nuts) and nuts, etc., in order to meet the installation of a different shape of the workpiece the need, the shape of the platen is also made very many. Use platen should pay attention to: (1) the position of the platen to arrange a suitable pressure in the workpiece rigid processing center place, the size of the clamping force should also be appropriate, or poor rigidity workpieces easy deformation. (2) machine mounts must be properly placed under the platen height should be the same or slightly higher than the workpiece and the workpiece, otherwise it will reduce the clamping effect. (3) The platen bolts must machine as close as possible to the workpiece, and the bolt to the workpiece a distance should be less than the distance of the bolts to the horn, so that the clamping force can be increased. (4) bolts to tighten, or enough because the pressure is not processing center of the workpiece is moved, resulting in damage to the workpiece, machine tool and cutting tool.