铝合金液压缸制造工艺研究

Manufacturing Technology of Aluminium Alloy Hydraulic Cylinder

【目的】铝合金液压缸具有质量小、内孔毛刺易清除、外观美观等优点,但也存在冲击韧性低等不足。因此,要开展铝合金液压缸制造工艺研究,保证其高强度、高韧性等性能要求。【方法】选用7050铝合金来优化液压缸结构,开展液压缸毛坯多向锻造、T73热处理及内孔滚压加工等工艺研究,获得了合理的铝合金液压缸制造工艺,保证其高强度、高冲击韧性、高疲劳寿命等力学性能要求和高尺寸精度、低表面粗糙度等加工精度要求。【结果】铝合金液压缸装配碟簧液压机构通过了机械操作寿命试验验证。【结论】采用7050铝合金,毛坯进行多向锻造、T73热处理、内孔滚压加工等工艺制造的铝合金液压缸,可满足其高油压高冲击工况性能要求。

[Purposes]Aluminum alloy hydraulic cylinder has the advantages of small mass,easy removal of inner hole burr and beautiful appearance,but it also has the disadvantages of low impact toughness.Therefore,it is necessary to carry out research on the manufacturing process of aluminum alloy hydraulic cylinder to ensure its high strength,high toughness and other performance requirements.[Methods]The 7050 aluminum alloy was selected to optimize the structure of the hydraulic cylinder,and the multidirectional forging of the hydraulic cylinder blank,T73 heat treatment,and rolling processing of the inner hole were studied to obtain reasonable manufacturing process of the aluminum alloy hydraulic cylinder to ensure its mechanical properties such as high strength,high impact toughness,and high fatigue life,and processing accuracy requirements such as high dimensional accuracy and low surface roughness.[Findings]The aluminum alloy hydraulic cylinder assembly disc spring hydraulic mechanism passed the mechanical operation life test verification.[Conclusions]The aluminum alloy hydraulic cylinder manufactured by multi-directional forging,T73 heat treatment and inner hole rolling of 7050 aluminum alloy blank can meet the performance requirements of high oil pressure and high impact conditions.