The blasting head painting, blasting head the volume http://www.hebftc6.com/ Phone 0317-8210122, mobile phone 13722724665 blasting head plant head structure blasting head consists of three parts  Ri is the radius of the spherical r is the radius of the transition arc (i.e., the hemming) and height is h straight edges. Spherical radius of the larger, folding the smaller the radius, the depth of the head will be more shallow, favorable for the molding process. But taking into account the spherical portion and the transition zone coupled at the local high stress, that the radius of the dished header surface portion is generally not greater than the cylinder inside diameter, and hemming the inner radius r in any case shall be smaller than the cylinder inside diameter 10, and should be not less than 3 times the nominal wall thickness of the head.