1. In the process of rounding the skeleton, pay attention to the distribution characteristics of the holes should meet the requirements of mechanics, so that the punched holes will be uniformly stressed during the rounding and jointing, so that the skeleton will be durable during use.
2. Generally, the holes should be rounded according to the characteristics of the hole type, so that the holes are staggered and distributed. In this way, according to the mechanical point of view, the force of the skeleton is uniform, and the life of the HYDAC filter element will be greatly improved.
3. The skeleton should be free of flash, burrs, and weld bead, and the weld should be trimmed and smooth. The punching surface of the skeleton should be away from the filter layer to avoid damage to the filter layer.