球弧式纵向剖分超高压模具

李胜华; 李金良

doi:10.11858/gywlxb.20200538

球弧式纵向剖分超高压模具

doi: 10.11858/gywlxb.20200538

李胜华^1,,
李金良^2,*, ,

1.
燕山大学机械工程学院，河北秦皇岛　066004
2.
河北省重型智能制造装备技术创新中心，河北秦皇岛　066000

详细信息

作者简介:
李胜华（1995－），男，硕士，主要从事超高压模具研究. E-mail：1179009877@qq.com

通讯作者:
李金良（1963－），男，教授，主要从事制造自动化系统研究. E-mail：jlli@ysu.edu.cn

中图分类号: O521.3
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出版历程
- 收稿日期: 2020-04-07
- 修回日期: 2020-04-19

Spherical Arc Longitudinal Split Ultra-High Pressure Mold

LI Shenghua^1
,,
LI Jinliang^{2,*
, ,}

1.
College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China
2.
Hebei Heavy-Duty Intelligent Manufacturing Equipment Technology Innovation Center, Qinhuangdao 066000, Hebei, China

摘要

摘要: 为了提高普通年轮式超高压模具的最大承载能力，提出了一种新型球弧式纵向剖分超高压模具结构。该模具的球弧式结构将对超高压模具损害最大的周向拉应力转变为轴向应力，并通过纵向剖分方式降低了轴向应力，提高了超高压模具压缸的极限承载能力。球弧式纵向剖分超高压模具不仅可以降低超高压模具的最大等效应力和最大切向应力，而且模具的腔体容积也相应增大。数值模拟结果表明：在相同载荷条件下，球弧式纵向剖分超高压模具的周向拉应力、等效应力和最大切向应力分别比普通年轮式超高压模具减小了68.1%、12.5%和18.0%。球弧式纵向剖分超高压模具的径向位移也有利于提高压缸的保压能力，同时球弧式纵向剖分超高压模具的腔体容积也比普通年轮式模具提高了约43%。分析表明，球弧式纵向剖分结构有利于提高生产效率，增加模具的使用寿命。
- 超高压模具 /
- 球弧式 /
- 纵向剖分 /
- 数值模拟
Abstract: In order to improve the maximum bearing capacity of ordinary annual wheeled ultra-high pressure molds, a new spherical arc longitudinally split ultra-high pressure mold structure is proposed. Due to the spherical-arc structure, the circumferential tensile stress of the ultra-high pressure mold that has suffered the most damage is converted into axial stress. Then, the axial stress is reduced by the longitudinal division method, thus improving the ultimate bearing capacity of the ultra-high pressure mold cylinder. Spherical-arc longitudinal splitting of the ultra-high pressure mold can not only reduce the equivalent stress and the maximum tangential stress of the ultra-high pressure mold, but also greatly increase the cavity volume of the mold. The numerical analysis results show that: under the same load condition, the circumferential tensile stress, equivalent stress and maximum tangential stress of the spherical-type longitudinally split ultra-high pressure mold are lower than ordinary annual wheel-type ultra-high pressure molds by 68%, 12.5% and 18.0%, respectively. The radial displacement of the spherical-arc longitudinally split ultra-high pressure mold is also conducive to improving the pressure-holding capacity of the cylinder, and the cavity volume of the spherical-arc longitudinally split ultra-high pressure mold is also increased by about 43% compared to that of the ordinary annual wheel mold. The analysis shows that the spherical-arc longitudinal split structure helps to improve the production efficiency and mold life.
- ultra-high pressure mould /
- ball-arc /
- longitudinal division /
- numerical analysis

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图 1 1/2年轮式超高压模具示意图

Figure 1. Schematic of 1/2 yearultra-high pressure die

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图 2 1/2球弧式纵向剖分超高压模具示意图

Figure 2. Schematic of 1/2 spherical arc longitudinalsplit ultra-high pressure mold

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图 3 年轮式超高压模具的几何尺寸

Figure 3. Geometrical dimensions of the annualwheeled ultra-high pressure mold

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图 4 球弧式压缸的几何尺寸

Figure 4. Geometrical dimensions of spherical arc cylinder

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图 5 两种模具结构的有限元模型

Figure 5. Finite element models of two mold structures

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图 6 超高压模具的载荷及边界条件

Figure 6. Loading and boundary conditions of ultra-high pressure mold

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图 7 两种超高压模具的周向应力分布

Figure 7. Circumferential stress distribution of two ultra-high pressure molds

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图 8 两种超高压模具的径向位移分布

Figure 8. Radial displacement distribution of two ultra-high pressure molds

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图 9 球弧式纵向剖分超高压模具的轴向位移分布

Figure 9. Axial displacement distribution of the spherical arclongitudinal split ultra-high pressure mold

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图 10 两种超高压模具的等效应力分布

Figure 10. Equivalent stress distribution of two ultra-high pressure molds

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图 11 两种超高压模具的最大剪切应力分布

Figure 11. Maximum shear stress distribution of two ultra-high pressure molds

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图 12 球弧式压缸内部结构和装填方式

Figure 12. Internal structure and filling method of spherical arc pressure cylinder

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表 1 压缸和支撑环的材料参数^[5]

Table 1. Material parameters of cylinder and support ring^[5]

Material	Density/(g·cm⁻³)	Elastic modulus/GPa	Poisson’s ratio	Failure strength/MPa	Shear strength/MPa
YG8	14.60	578	0.22	6 200	3 250
45CrNiMoVA	7.83	210	0.29	1 600	800

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表 2 两种模具压缸相关应力和腔体容积

Table 2. Various stresses and cavity volumes of the two mold cylinders

Mold type	Circumferential tensile stress/MPa	Radial expansion displacement/μm	Maximum equivalent stress/MPa	Maximum shear stress/MPa	Cavity volume/mm³
Annual wheeled mold	2219.7	49.22	7091.9	4094.5	859.35
Spherical arc longitudinally split mold	708.7	38.85	6204.9	3359.3	1228.30

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