钢丝缠绕剖分式超高压模具等张力预紧分析

刘志卫; 吴承伟; 童明俊; 朱守应

doi:10.11858/gywlxb.20200591

钢丝缠绕剖分式超高压模具等张力预紧分析

doi: 10.11858/gywlxb.20200591

安徽理工大学机械工程学院，安徽淮南　232001

基金项目: 国家自然科学基金（51605007）；安徽省自然科学基金（1708085QE126）

详细信息

作者简介:
刘志卫（1986－），男，博士，讲师，主要从事超高压模具设计及塑性加工过程数值模拟研究. E-mail：lzwlws@163.com

通讯作者:
吴承伟（1993－），男，硕士研究生，主要从事超高压模具数值模拟研究. E-mail：wucheng.wei@foxmail.com

中图分类号: O521.3; TG375.41
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出版历程
- 收稿日期: 2020-07-13
- 修回日期: 2020-07-27

Analysis of Equal Tension Pre-Tightening of Steel Wire Winding Split Ultra-High Pressure Die

School of Mechanical Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China

摘要

摘要: 针对超高压装置大型化受限于大质量硬质合金加工困难等问题，设计了一种新型的钢丝缠绕剖分式两面顶超高压模具。该模具主要由内部的剖分式压缸和外部的预应力钢丝组成。对采用等张力钢丝缠绕模具进行了力学模型分析，并通过有限元软件对剖分式压缸和钢丝缠绕层进行研究。结果表明：加载后压缸腔体的最大等效应力出现在压缸腔体内壁；压缸腔体尺寸稳定性与钢丝缠绕层数及钢丝直径成正比；在缠绕层内部，钢丝轴向应力与钢丝直径成反比，与缠绕层数成正比。
- 超高压模具 /
- 钢丝缠绕 /
- 两面顶 /
- 预紧
Abstract: Due to the machining challenge of high-quality cemented carbide, ultra-high pressure devices are always limited on scale. In our work, a new type of wire wound and split ultra-high pressure die with two-anvil was proposed to try to overcome this limitation. The die is mainly composed of internal split cylinder and external prestressed steel wire. On the basis of the mechanical modeling and via the finite element software, the equal tension winding die was analyzed and the split pressure die as well as steel wire winding layer were studied. The results show that the maximum equivalent stress appears on the inner wall of the pressure die cavity after loading; the dimensional stability of pressure die cavity is proportional to the number of layers of wire winding and the diameter of the wire. The axial stress of the wire in the winding layer is inversely proportional to the diameter of the wire but proportional to the number of layers of the wire.
- ultra-high pressure die /
- wire winding /
- two-anvil /
- pre-tightening

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图 1 超高压装置

Figure 1. Ultra-high pressure device

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图 2 剖分式压缸受力分析

Figure 2. Force analysis of split pressure die

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图 3 钢丝缠绕模具有限元模型

Figure 3. Finite element model of steel wire winding die

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图 4 钢丝轴向应力分布

Figure 4. Axial stress distribution of steel wire

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图 5 最外层钢丝的轴向应力分布

Figure 5. Axial stress distribution of outermost steel wire

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图 6 腔体尺寸稳定性的周向变化

Figure 6. Circumferential variation of cavity size stability

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图 7 压缸和支撑环的径向压应力沿周向的分布

Figure 7. Distribution of radial compressive stress of pressure die and support ring along circumferential direction

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图 8 压缸径向位移变化

Figure 8. Radial displacement change of pressure die

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表 1 材料的主要性能参数^[16]

Table 1. Main parameters of materials^[16]

Material Elastic modulus/GPa Poisson’s ratio Yield limit/MPa Failure strength/MPa

YG8 570 0.2 6200
45CrNiMoVA 210 0.3 1325 1600
65Mn 210 0.3 375 2445

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