The drilling, boring and tapping combined machine tool independently developed and manufactured by Beijing Leiming Symbio Mechanical and Electrical Technology Co., Ltd., successfully completed the drilling and tapping of 32 positioning bolt holes for pressure vessel supports at the site of Unit 1 of the Nuclear Power Demonstration Project on November 30, 2020. The work was accepted as qualified upon one-time inspection, with a qualification rate of 100%. 

The Guonuclear Demonstration Project - the CAP1400 pressurized water reactor nuclear power unit is a non-active large-scale advanced pressurized water reactor nuclear power unit with independent intellectual property rights of our country, which has a higher power capacity and was developed through re-innovation based on the comprehensive absorption and digestion of the passive technology of the third-generation advanced nuclear power AP1000 imported from our country. The construction position space of the bolt holes for the pressure vessel support is very limited and the processing accuracy requirements are high. 

The Raymond Cyber R&D team, based on their processing experience of the support bolt holes of AP1000 pressure vessels and the technical requirements of CAP1400 pressure vessel support bolt holes, independently developed a high-power online processing drilling, boring and tapping combined machine tool, as well as dedicated tools and processing techniques. With one machine tool, the drilling, boring and tapping processes can be carried out simultaneously, reducing the time for on-site machine tool replacement and repetitive positioning adjustment. Once installed, it can achieve the processing of 4 light holes and 4 threaded holes, without the need for re-adjustment of positioning. With high-power drive and a high-stiffness spindle, the processing accuracy, precision and efficiency fully meet the technical requirements of "CAP1400 pressure vessel support bolt holes". 

Raymond Cebu has remained true to its original mission, persisting in independent research and development. It has the courage to break through the technological monopolies of foreign countries and has contributed to the safe, high-quality and efficient development of the country's third-generation nuclear power plants.