斯贝发动机部件间联接和紧固所用的螺栓,大部分是锻造螺栓。其中以外十二方型螺栓和外六方型螺栓最为普遍。这种螺栓标准化程度高、系列性强,在国外已大量生产。它与机加螺栓相比具有生产稳定,质量可靠、效率高、成本低等优点。对于螺栓类标准件生产而言,锻造成形是一种很有发展前景的生产技术。 Most of the bolts used to connect and fasten the engine parts between Spey, are forged bolts. Among them, twelve square bolts and outer hexagon bolts are the most common. This bolt a high degree of standardization, strong series, mass production in foreign countries. Compared with the mechanical bolt it has the advantages of stable production, reliable quality, high efficiency and low cost. For the production of bolts standard parts, forging forming is a very promising production technology.