微小尺寸等壁厚不锈钢螺旋管充液压制成形方法研究

邓娟; 王澳; 李金平; 石昌帅

doi:10.13433/j.cnki.1003-8728.20200572

微小尺寸等壁厚不锈钢螺旋管充液压制成形方法研究

doi: 10.13433/j.cnki.1003-8728.20200572

邓娟^1,,
王澳²,
李金平²,
石昌帅^2, ,

1.
中航工业成都发动机集团公司，成都　610500
2.
西南石油大学机电工程学院，成都　610500

基金项目: 国家自然科学基金面上项目(52174210)、四川省自然科学基金项目(23NSFSC2137)、成都市国际科技合作项目（2019-GH02-00034-HZ）及西南石油大学青年科技创新团队项目( 2018CXTD03)

详细信息

作者简介:
邓娟（1985−），高级工程师，硕士，研究方向为金属材料应用，blue_dj@126.com

通讯作者:
石昌帅，副教授，博士，scs1202@126.com

中图分类号: TE921; TG376.9; TG376.5
计量
- 文章访问数: 108
- HTML全文浏览量: 77
- PDF下载量: 11
- 被引次数: 0
出版历程
- 收稿日期: 2021-01-26
- 网络出版日期: 2023-03-27
- 刊出日期: 2023-02-25

Study on Hydraulic Pressure Forming of Stainless Steel Spiral Pipe with Small Size and Equal Wall Thickness

1.
AVIC Chengdu Engine Co., Ltd., Chengdu 610500, China
2.
School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China

摘要

摘要: 为了解决常规螺杆钻具寿命短与微小尺寸螺杆钻具等壁厚定子难加工的问题，本文采用充液压制成形工艺加工微小尺寸等壁厚螺旋管，基于304不锈钢拉伸实验，建立了充液压制成形等壁厚螺旋管有限元模型，用数值模拟方法研究管件外径、壁厚、液压力大小、液压力加载路径、压制速度、摩擦系数对螺旋管质量的影响。结果表明，管件外径为51.8 mm，壁厚为5.3 mm时，螺旋管质量较好，最大液压力为650 MPa，液压力加载路径为路径5，模具挤压速度为0.429 m/s，摩擦因数不超过0.125时，螺旋管加工质量较好，导程误差近似为0，壁厚误差小于8%，平均厚度为5 mm，螺旋管中部壁厚误差小于3%。研究结果可为生产实际中微小尺寸等壁厚不锈钢螺旋管的成形工艺提供参考。
- 螺杆钻具 /
- 等壁厚定子 /
- 螺旋管 /
- 充液压制成形 /
- 数值模拟
Abstract: In order to solve the short life of the conventional screw drill and the difficulty of machining small-sized stator of the screw drill with equal wall thickness, this paper uses hydraulic pressure forming technology to manufacture the small-sized equal-wall spiral tubes. Based on the 304 stainless steel tensile experiment, a finite element model for spiral tube with equal wall thickness formed by hydraulic pressure was established. The numerical simulation method is used to study the influence of the pipe outer diameter, wall thickness, hydraulic pressure, hydraulic pressure loading path, pressing speed and friction coefficient on the quality of the spiral pipe. The results show that when the outer diameter of the pipe is 51.8 mm and the wall thickness is 5.3 mm, the quality of the spiral pipe is better, the maximum hydraulic pressure is 650 MPa, the hydraulic pressure loading path is path 5, and the extrusion speed of the die is 0.429 m/s. When the friction coefficient does not exceed 0.125, the spiral tube quality is better, the lead error is approximately 0, the wall thickness error is less than 8%, the average thickness is 5 mm, and the wall thickness error in the middle of the spiral tube is less than 3%. The result can provide the reference for forming the stainless steel spiral pipe with the small size and equal wall thickness.
- screw drill /
- equal wall thickness stator /
- spiral pipe /
- forming of hydraulic pressure /
- numerical simulation

HTML全文

图 1 螺杆钻具定子模型

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图 2 304不锈钢拉伸实验

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图 3 充液压制成形等壁厚螺旋管原理图

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图 4 有限元模型

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图 5 液压力加载路径与模具位移时间路径

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图 6 管件外径对成形质量的影响

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图 7 管件外径变化下的成形极限图

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图 8 管件外径对螺旋管最小壁厚、最大壁厚的影响

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图 9 管件壁厚对成形质量的影响

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图 10 成形极限图

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图 11 管件壁厚对螺旋管壁厚尺寸的影响

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图 12 8种液压力

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图 13 液压力对螺旋管最小、最大壁厚的影响

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图 14 液压力对成形质量的影响

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图 15 液压力变化下的成形极限图

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图 16 8种液压力加载路径

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图 17 液压力加载路径对螺旋管壁厚的影响

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图 18 液压力加载路径对成形质量的影响

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图 19 8种挤压速度

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图 20 挤压速度对螺旋管壁厚的影响

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图 21 挤压速度对成形质量的影响

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图 22 成形极限图

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图 23 挤压速度对壁厚误差的影响

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图 24 摩擦因数对成形质量的影响

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图 25 摩擦因数对壁厚的影响

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表 1 5LZ54定子螺旋管尺寸参数

外径/mm 壁厚/mm 导程/mm 传动比定子头数

54 5 360 5∶6 6

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表 2 不同壁厚的管件参数

壁厚/mm 5.0 5.1 5.2 5.3 5.4 5.5

中径/mm 23.25 23.25 23.25 23.25 23.25 23.25

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