en.Wedoany.com Reported - At its base in the Dongfang Aerospace Port in Haiyang, Shandong, China's Beijing Jiuxinge Aerospace Technology has achieved the simultaneous production of two large-scale aluminum alloy common bulkhead propellant tanks, with diameters reaching the 4-meter and 5-meter classes respectively. Among them, the 5-meter diameter tank sets a domestic record for the same type of component in active service rockets. The full set of products has passed all process tests and is about to be integrated into key rocket models for assembly and flight missions. Fangyuan Group undertook the precision machining of the core structural components for these two tanks, including two key parts: the fork ring and the integral bottom dome.
In this project, Fangyuan Group's CNC machining center established a dedicated team to tackle the two major processing challenges: the irregular curved surface of the fork ring and the large, thin-walled structure of the integral bottom dome. The team optimized the cutting parameters for large CNC vertical lathes and machining centers, independently designed specialized internal support fixtures and flexible positioning jigs, and established a multi-pass semi-finishing and finishing step-by-step shape control plan. Through hundreds of trial cuts and calibrations, they effectively suppressed cutting deformation of large aerospace aluminum parts. Concurrently, the team refined the full-process inspection procedure, implementing precise point-by-point measurements for curved surface profiles, ring face parallelism, and sealing step dimensions. All machining indicators met the acceptance standards for aerospace first-class products.
The completion of the core component support task for these 4-meter and 5-meter class common bulkhead propellant tanks signifies that Fangyuan Group now possesses the capability for batch precision machining of key load-bearing parts for large-diameter liquid rocket propellant tanks in China, addressing the shortfall in local component supply at the Dongfang Aerospace Port in Haiyang. Fangyuan Group plans to continuously upgrade its aerospace precision machining production lines, iterate on thin-walled aluminum alloy shape and property control processes, and expand the range of supporting rocket body structural components, leveraging local manufacturing capabilities to support the Dongfang Aerospace Port in building a full-chain industrial cluster encompassing component manufacturing, final assembly, and sea launch operations.
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