预应力钢丝缠绕装置钢丝张力的影响分析

Analysis of the Influence of Wire Tension in Prestressed Wire Winding Devices

针对预应力钢丝缠绕装置对超高压模具的预紧问题,设计了一种新型的钢丝张力调节机构,改变钢丝的张力来调节模具的预应力大小。对钢丝张力的产生进行力学模型分析,并通过有限元软件对钢丝在不同压力、不同速度与不同直径下钢丝轴向应力变化的分析。结果表明:钢丝的轴向应力跟钢丝速度呈非线性关系,随着钢丝速度的增加,钢丝轴向应力先增大,达到峰值,而后减小并最终趋于平稳;钢丝的轴向应力与液压缸压力成正比,与钢丝直径成反比。

In view of the preload problem of the preload of the ultra-high pressure mold by the prestressed wire winding device, a new type of wire tension adjustment mechanism is designed to change the tension of the steel wire to adjust the prestress size of the mold. The mechanical model analysis of the generation of steel wire tension is carried out, and the axial stress change of steel wire under different pressures, different speeds and different diameters is analyzed by finite element software. The results show that the axial stress of the steel wire has a nonlinear relationship with the speed of the steel wire, and with the increase of the speed of the steel wire, the axial stress of the steel wire first increases, reaches the peak, and then decreases and eventually tends to be stable;The axial stress of the steel wire is proportional to the hydraulic cylinder pressure and inversely proportional to the diameter of the wire.