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目前,塔机技术发展已进入一个新阶段,尤其是在结构设计制造方面,已广泛采用变截面、变模数设计取代过去的等截面、等模数设计,使整机重量降低,受力情况大为改善。由此给制造工艺提出了更高的要求,要求工艺对变截面、变模数结构制造的精度、经济性及适应性必须给予保证。对此,我厂在制造QTZ60型变截面、变模数的45m长臂架塔机过程中,研制出一套经
At present, the development of tower crane technology has entered a new stage. Especially in the aspect of structural design and manufacturing, variable cross-section and variable-modulus design have been widely used to replace past equal-section and equal-modulus design, so that the weight of the whole machine is reduced, and the stress is reduced. Greatly improved. As a result, higher requirements are placed on the manufacturing process, and the process must be guaranteed for the precision, economy, and adaptability of variable cross-section and variable-modulus structures. In response, our factory developed a set of models for manufacturing QTZ60 variable-section, variable-modulus 45m long boom tower cranes.