Scheme to increase the ultimate pressure of the China-type cubic press

The China-type cubic press (CCP) is widely used in the high-pressure field because of its simple operation and low cost. However, the low ultimate pressure inside the cavity of CCP has limited its application. In order to improve the ultimate pressure of the cavity, this paper simulates the pressure transfer efficiency and the Von Mises stress (VMS) of the tungsten carbide (WC) anvil. We find that the effect of the pretightening force of the WC anvil can be changed by changing the angle of the steel supporting ring. When the angle of the steel supporting ring is 1.2°, the pretightening force of the WC anvil is the most uniform, and the support effect of the WC anvil is the best. At the same time, this paper designs a double-beveled WC (D-WC) anvil. The D-WC anvil can not only improve the ultimate pressure of the cavity, but also ensure the stability of the cavity and the durability of the WC anvil. The design in this paper can also be used with the first-stage pressurization assembly to achieve better pressurization effect.