Fine grinding non-corrodible steel high temperature and high pressure resistant hollow floating ball

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 As shown, the finely ground stainless steel pressure-resistant hollow float is mainly composed of an upper hemisphere (1), a vent hole (2), a centerline weld (3) and a lower hemisphere (4). Firstly, design a semi-spherical drawing die, and stretch the stainless steel plate into two semi-spherical semi-sphericals with equal wall thickness through a numerical control hydraulic stretching machine, namely the upper hemisphere (1) and the lower hemisphere (4); trim the edges according to the design parameters , a 1.5mm vent hole (2) is drilled on the top of the upper hemisphere (1), so that the hollow ball maintains the balance of internal and external pressure during welding; the upper hemisphere (1) and the lower hemisphere (4) are connected in a triangular shape by argon shield welding The welding is fixed without leaving a gap; then