Analysis of the structure characteristics for hydraulic press with unity of cylinder and beam

The hydraulic press with unity of cylinder and beam(HPUCB) is a new kind of press.It's advantages include as follows: The weight and height can be evidently decreased without upper beam,which cuts down the manufacturing cost and transporting fee.The action area of semispherical hydraulic cylinder in HPUCB has been enlarged 3-5 times compared to that in the traditional press,which causes the capacity of the HPUCB can be enlarged about 6-8 times than the traditional press with same contour.The HPUCB puts forward a new way for manufacturing large capacity press over 10MN.The mechanics analysis of semispherical hydraulic cylinder and traditional cylinder has been compared in the text and the main dimensions of semi-spherical cylinder for HPUCB from 50MN to 900 MN have been introduced.