CN113199772A - 一种航空发动机风扇出口导向静叶组件内端平台再制造工艺 - Google Patents
一种航空发动机风扇出口导向静叶组件内端平台再制造工艺 Download PDFInfo
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Abstract
本发明涉及一种航空发动机风扇出口导向静叶组件内端平台再制造工艺,包括航空发动机风扇出口导向静叶组件预处理和定位;聚氨酯Adiprene L315和固化剂Ethacure 300的预热处理和脱泡;聚氨酯Adiprene L315、固化剂Ethacure 300和着色剂Kemi nero 1929DF按比例真空混合、浇注、固化脱模、硫化处理。本发明可用于航空发动机风扇出口导向静叶组件内端平台的低成本量产再制造,填补航空发动机关键部件的再制造技术空白,降低关键部件的再制造成本和周期。
Description
技术领域
本发明属于航空结构制备技术领域,具体涉及一种航空发动机风扇出口导向静叶组件内端平台再制造工艺。
背景技术
航空发动机风扇出口导向静叶组件结构是航空发动机关键构件之一,处于航空发动机风扇出口,在服役过程中会出现裂纹及破碎等损伤,给航空器安全运行带来巨大隐患和高昂的运维成本;且由于航空发动机风扇出口导向静叶组件构件的适航要求高,复杂结构的成型、耐环境性能和与碳纤维增强复合材料的粘接性能成为限制其应用。
聚氨基甲酸脂(Polyurethane)简称为聚氨酯(PU),是一种新兴生态环保类高分子材料;聚氨酯硬度范围广、强度高、弹性好、低温性能优异、耐磨性好,以及聚氨酯弹性体的生物相容性好、且具备优异的耐油、耐溶剂、耐电压和电绝缘性能等。鉴于聚氨酯弹性体优异的力学性能、物理性能以及化学性能,在国民经济的各个行业被广泛使用。
因此,本发明采用聚氨酯材料作为航空发动机风扇出口导向静叶组件内端平台再制造的注模原材料,旨在发明一种航空发动机风扇出口导向静叶组件内端平台损伤再制造的低成本量产工艺,减少高成本叶片整体更换,缩短停机时间,降低航空发动机全寿命使用成本。
发明内容
本发明的目的在于克服现有技术的不足,提供一种航空发动机风扇出口导向静叶组件内端平台再制造工艺,该工艺采用自动定位工装模具,聚氨酯Adiprene L315、固化剂Ethacure 300作为主材料,着色剂Kemi nero 1929 DF作为改性材料,实现航空发动机风扇出口导向静叶组件内端平台再制造的低成本量产,满足适航要求。
本发明解决其技术问题是通过以下技术方案实现的:
一种航空发动机风扇出口导向静叶组件内端平台再制造工艺,其特征在于:所述工艺步骤为:
1)导向静叶组件的预处理;
2)导向静叶组件的定位及模具预热;
3)浇注液原材料预处理;
4)浇注液制备;
5)浇注;
6)脱模和硫化。
而且,所述步骤1)的具体操作为:采用600~1000号砂纸去除导向静叶组件损伤内端平台与导向静叶粘接部分,并粗化导向静叶组件内端平台粘接区域,但不能损伤纤维,再用无水乙醇冲洗导向静叶组件,然后放置烘箱中60~80℃干燥24h以上。
而且,所述步骤1)中导向静叶组件内端平台粘接区域的粗糙度为Ra25~50。
而且,所述步骤2)的具体操作为:将步骤1)预处理完的导向静叶组件安装在模具的定位工装上,保证导向静叶组件和内端平台的嵌入角度和深度,同时对模具进行预热,恒温100℃。
而且,所述步骤3)浇注液原材料预处理为将聚氨酯Adiprene L315在烘箱中100℃预热12h,固化剂Ethacure 300在烘箱中40℃预热4h,然后分别进行脱泡处理,脱泡真空度为0.1MPa,脱泡时间10min。
而且,所述步骤4)的浇注液制备为将步骤3)脱泡完的聚氨酯Adiprene L315、固化剂Ethacure 300与着色剂Kemi nero 1929 DF按一定比例添加到真空均交机的匀胶灌中,然后在真空匀胶机中进行混合,混合工艺为转速3800r/min,时间400s。
而且,所述步骤4)中聚氨酯Adiprene L315、固化剂Ethacure 300与着色剂Keminero 1929 DF的混合比例为:
w.t%(固化剂)=(聚氨酯×NCO×0.95×107)/4202
w.t%(着色剂)=(w.t%(固化剂)+w.t%(聚氨酯))×3%。
而且,所述步骤5)操作为将步骤4)制备好的浇注液通过模具浇注口浇注入模具中,直至模具冒口有聚氨酯体系溢出,确保浇注时间小于3min。
而且,所述步骤6)的脱模和硫化处理为在步骤5)完成后15min进行脱模,采用目视检查浇注内端平台外观,同时对浇注内端平台尺寸进行检测,确保完整、清洁、无缺陷、饱满,然后将其放入烘箱中100℃硫化16h。
本发明的优点和有益效果为:
1、本发明的航空发动机风扇出口导向静叶组件内端平台再制造工艺,模具采用可拆卸及定位叶片的自动化模具,能严格有效匹配浇注叶片内端平台工艺和尺寸要求,提高生产效率,降低生产成本。
2、本发明的航空发动机风扇出口导向静叶组件内端平台再制造工艺,通过采用聚氨酯Adiprene L315和固化剂Ethacure 300作为主体材料,采用着色剂Kemi nero 1929 DF进行改性,再制造的航空发动机风扇出口导向静叶组件内端平台硬度、强度,以及与导向静叶组件的粘接强度均满足适航要求,确保复合材料成型质量及力学性能。
附图说明
图1为本发明采用模具的结构示意图;
图2为本发明再制造完成航空发动机风扇出口导向静叶组件内端平台的结构示意图。
附图标记说明
1-底模、2-上模、3-加热管道、4-左右定位螺栓、5-导向静叶组件定位装置、6-注口、7-冒口。
具体实施方式
下面通过具体实施例对本发明作进一步详述,以下实施例只是描述性的,不是限定性的,不能以此限定本发明的保护范围。
如图1所示为航空发动机风扇出口导向静叶组件内端平台再制造模具;包括底部底模1、上模2、加热管路3、左右定位螺栓4、导向静叶组件定位装置5、浇注口6、冒口7;
本模具为金属材质,有利于加热过程的热传导,模具表面喷涂一薄层脱模剂,脱模剂与聚氨酯不粘的特性,这样制件在完成固化后极易从模具中分离,从而实现快速脱模。
一种航空发动机风扇出口导向静叶组件内端平台再制造工艺,其特征在于:所述工艺步骤为:
1)导向静叶组件的预处理:采用600~1000号砂纸去除导向静叶组件损伤内端平台与导向静叶组件粘接部分,并粗化导向静叶组件内端平台粘接区域,粗糙度为Ra25~50,但不能损伤纤维,再用无水乙醇冲洗导向静叶组件,然后放置烘箱中60~80℃干燥24h以上;
2)导向静叶组件的定位及模具预热:将步骤1)预处理完的导向静叶组件安装在模具的定位工装上,保证导向静叶组件和内端平台的嵌入角度和深度,同时对模具进行预热,恒温100℃;
3)浇注液原材料预处理:将聚氨酯Adiprene L315在烘箱中100℃预热12h,固化剂Ethacure 300在烘箱中40℃预热4h,然后分别进行脱泡处理,脱泡真空度为0.1MPa,脱泡时间10min;
4)浇注液制备:将步骤3)脱泡完的聚氨酯Adiprene L315、固化剂Ethacure 300与着色剂Kemi nero 1929DF按一定比例添加到真空均交机的匀胶灌中,然后在真空匀胶机中进行混合,混合工艺为转速3800r/min,时间400s;
聚氨酯Adiprene L315、固化剂Ethacure 300与着色剂Kemi nero 1929DF的混合比例为:
w.t%(固化剂)=(聚氨酯×NCO×0.95×107)/4202
w.t%(着色剂)=(w.t%(固化剂)+w.t%(聚氨酯))×3%。;
5)浇注:将步骤4)制备好的浇注液通过模具浇注口浇注入模具中,直至模具冒口有聚氨酯体系溢出,确保浇注时间小于3min;
6)脱模和硫化:在步骤5)完成后15min进行脱模,采用目视检查浇注内端平台外观,同时对浇注内端平台尺寸进行检测,确保完整、清洁、无缺陷、饱满,然后将其放入烘箱中100℃硫化16h。
尽管为说明目的公开了本发明的实施例和附图,但是本领域的技术人员可以理解:在不脱离本发明及所附权利要求的精神和范围内,各种替换、变化和修改都是可能的,因此,本发明的范围不局限于实施例和附图所公开的内容。
Claims (9)
1.一种航空发动机风扇出口导向静叶组件内端平台再制造工艺,其特征在于:所述工艺步骤为:
1)导向静叶组件的预处理;
2)导向静叶组件的定位及模具预热;
3)浇注液原材料预处理;
4)浇注液制备;
5)浇注;
6)脱模和硫化。
2.根据权利要求1所述的航空发动机风扇出口导向静叶组件内端平台再制造工艺,其特征在于:所述步骤1)的具体操作为:采用600~1000号砂纸去除导向静叶组件损伤内端平台与导向静叶粘接部分,并粗化导向静叶组件内端平台粘接区域,但不能损伤纤维,再用无水乙醇冲洗导向静片,然后放置烘箱中60~80℃干燥24h以上。
3.根据权利要求2所述的航空发动机风扇出口导向静叶组件内端平台再制造工艺,其特征在于:所述步骤1)中导向静叶组件内端平台粘接区域的粗糙度为Ra25~50。
4.根据权利要求1所述的航空发动机风扇出口导向静叶组件内端平台再制造工艺,其特征在于:所述步骤2)的具体操作为:将步骤1)预处理完的导向静叶组件安装在模具的定位工装上,保证导向静叶和内端平台的嵌入角度和深度,同时对模具进行预热,恒温100℃。
5.根据权利要求1所述的航空发动机风扇出口导向静叶组件内端平台再制造工艺,其特征在于:所述步骤3)浇注液原材料预处理为将聚氨酯Adiprene L315在烘箱中100℃预热12h,固化剂Ethacure 300在烘箱中40℃预热4h,然后分别进行脱泡处理,脱泡真空度为0.1MPa,脱泡时间10min。
6.根据权利要求1所述的航空发动机风扇出口导向静叶组件内端平台再制造工艺,其特征在于:所述步骤4)的浇注液制备为将步骤3)脱泡完的聚氨酯Adiprene L315、固化剂Ethacure 300与着色剂Kemi nero 1929DF按一定比例添加到真空均交机的匀胶灌中,然后在真空匀胶机中进行混合,混合工艺为转速3800r/min,时间400s。
7.根据权利要求6所述的航空发动机风扇出口导向静叶组件内端平台再制造工艺,其特征在于:所述步骤4)中聚氨酯Adiprene L315、固化剂Ethacure 300与着色剂Kemi nero1929DF的混合比例为:
w.t%(固化剂)=(聚氨酯×NCO×0.95×107)/4202
w.t%(着色剂)=(w.t%(固化剂)+w.t%(聚氨酯))×3%。
8.根据权利要求1所述的航空发动机风扇出口导向静叶组件内端平台再制造工艺,其特征在于:所述步骤5)操作为将步骤4)制备好的浇注液通过模具浇注口浇注入模具中,直至模具冒口有聚氨酯体系溢出,确保浇注时间小于3min。
9.根据权利要求1所述的航空发动机风扇出口导向静叶组件内端平台再制造工艺,其特征在于:所述步骤6)的脱模和硫化处理为在步骤5)完成后15min进行脱模,采用目视检查浇注内端平台外观,同时对浇注内端平台尺寸进行检测,确保完整、清洁、无缺陷、饱满,然后将其放入烘箱中100℃硫化16h。
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