Operation and sealing method of large cubic press based on two-sided jacking mode

Abstract

The invention relates to an operation and sealing method of a large cubic press based on a two-sided jacking mode. The top surfaces of four transverse non-heating hammers of the cubic press are designed into rectangles and are first fitted to form a square cavity during operation, and the oil ways of oil cylinders corresponding to two vertical heating hammers are separated from those of the otherfour oil cylinders and independently controlled; square columns with proper heights are designed at the top ends of the two heating hammers, the pressurizing process is realized by pushing the squarecolumns in the square cavity, and an inner sealing form is adopted between the heating hammers and the cavity; and inner sealing edges with proper widths and angles are designed on the four sides of the square columns. According to the invention, a traditional pressurizing mode is changed, the four non-heating hammers form a square cavity in advance under proper pressure, the pressure of the non-heating hammers is gradually increased and is matched with the pressure of the heating hammers while the heating hammers are pushed forwards, the utilization rate of oil pressure is increased, and theproblem that the pressure of a top hammer plane and the pressure of the sealing edges are uneven due to volume shrinkage in the diamond synthesis process is solved.

Description

technical field [0001] The invention relates to an operation and sealing method of a large six-sided top press based on a two-sided top method. Background technique [0002] Among the equipment used in the diamond synthesis process, although the double-sided press has a large cavity and stable and uniform pressure, it has been gradually replaced by the relatively low-cost six-sided press due to its high cost. [0003] The working principle of the six-sided top press is as follows: figure 1 As shown, six tungsten carbide anvils are vertically pressed from the six faces of the pyrophyllite cube, and through the small bevel angle (41-42°) around the hammer face, about 12 angles are formed on the twelve edges of the pyrophyllite cube - 14mm wide sealing edge with triangular profile. Materials such as pyrophyllite and graphite have good fluidity under high pressure, so the pressure field in the cavity remains relatively balanced. The flow of pyrophyllite under high pressure ha...

AI Technical Summary

Problems solved by technology

Most of the assembled presses with a cylinder diameter of 750mm or more are often used to ensure stability by reducing the size of the anvil and the volume of the powder compact, forming a pattern of large horse-drawn carts, resulting in waste of equipment capacity

To sum up, the bottleneck restricting the development of super-large-bore six-sided top presses should be the uniformity of stress distribution of the anvil

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