火箭推进

针对转子轴承配合面尺寸超差影响轴承装配问题,结合零件内腔注蜡、产品工序复杂、加工周期长等特点,拟采用刷镀工艺对轴承配合面尺寸进行修复。通过对刷镀工艺的可行性、可靠性及刷镀工艺参数等技术重点和难点分析,设计及优化了匹配该转子刷镀的工艺参数及工装。经过对转子轴承配合面室温刷镀,满足转子轴承配合面铜镀层厚度要求,修复后的转子轴承配合面尺寸不仅满足要求,同时转子在皮带转速试验中镀层状态表现良好,现已通过水试考核验证了工艺技术的可行性。

In view of the problem that the size of rotor bearing's mating surface exceeds the tolerance and affects the bearing assembly, combined with the characteristics of wax injection in the inner cavity of the parts, complicated product process and long processing period, it is proposed to use the brush plating technology to repair the size of bearing's mating surface.Based on the analysis of the feasibility, reliability and technical key points and difficulties of the brush plating process parameters, the process parameters and tooling of this type of rotor are designed and optimized.After brush plating of the rotor bearing matching surface at room temperature, the copper coating thickness of the rotor bearing matching surface is satisfied.In addition, the coating state of the rotor is good in the belt speed test, and the feasibility of the process technology is verified by water test.

引言
1 刷镀原理及研究思路
2 结果与讨论
3 结论

图1 刷镀原理示意图<br/>Fig.1 Schematic diagram of brush plating principle

图1 刷镀原理示意图
Fig.1 Schematic diagram of brush plating principle

图2 转子尺寸修复面示意图<br/>Fig.2 Schematic diagram of rotor dimension repair surface

图2 转子尺寸修复面示意图
Fig.2 Schematic diagram of rotor dimension repair surface

图3 转子刷镀技术研究思路<br/>Fig.3 Research flow of brush plating technology for rotor

图3 转子刷镀技术研究思路
Fig.3 Research flow of brush plating technology for rotor

图4 不同镀层的组织形貌<br/>Fig.4 Microstructure and morphology of different coatings

图4 不同镀层的组织形貌
Fig.4 Microstructure and morphology of different coatings

图5 电镀过程阴、阳极位置示意图<br/>Fig.5 Schematic diagram of the position of cathode and anode in electroplating process

图5 电镀过程阴、阳极位置示意图
Fig.5 Schematic diagram of the position of cathode and anode in electroplating process

图6 镀液的阴极极化曲线示意图<br/>Fig.6 Schematic diagram of cathodic polarization curve of plating solution

图6 镀液的阴极极化曲线示意图
Fig.6 Schematic diagram of cathodic polarization curve of plating solution

表1 电压与镀层的关系<br/>Tab.1 Relationship between voltage and coating

表1 电压与镀层的关系
Tab.1 Relationship between voltage and coating

图7 刷镀线速度与镀层沉积速率关系<br/>Fig.7 Relationship between brush plating wire speed and deposition rate of coating

图7 刷镀线速度与镀层沉积速率关系
Fig.7 Relationship between brush plating wire speed and deposition rate of coating

图8 划格法试验后试片外观<br/>Fig.8 Appearance of test piece after drawing test

图8 划格法试验后试片外观
Fig.8 Appearance of test piece after drawing test

图9 拉伸试验件
Fig.9 Tensile test piece

图10 转子镀层状态<br/>Fig.10 Rotor coating state

图10 转子镀层状态
Fig.10 Rotor coating state

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备注

引言

1 刷镀原理及研究思路

2 结果与讨论

3 结论

期刊信息