棉纺精梳机钳板的变形及其应力分析

为研究棉纺精梳机下钳板工作状态时的变形与应力,对钳板钳持过程的动力学进行分析,建立了弹簧压力、钳板钳持力矩、钳板有效压力、下钳板变形及应力的数学模型;利用Ansys有限元分析软件对分别采用铬合金、铝合金及钛合金时下钳板的应力及变形进行仿真及分析。结果表明:在钳板钳口钳持状态下,3种不同合金材料的下钳板的实际最大应力远小于其许用应力;在工作状态时,3种不同合金材料下钳板的最大变形分别为钛合金0.008 mm, 铝合金0.010 3 mm, 铬合金0.019 3 mm,即采用钛合金下钳板时下钳板变形最小,有利于改善上下钳板握持状态,改善梳理质量及减少可纺纤维损失。

Deformation and stress analysis on nippers of cotton combing machine

In order to study the stress and deformation on the working state of the lower nipper in cotton spinning combers, and to analyze the kinetic of the nipper clamping process, mathematical models were established to describe the spring pressure, nipper clamping torque and nipper effective pressure, the deformation and stress of the lower nipper. Ansys finite element analysis software was used to simulate and analyze the stress and deformation of the lower nipper made from chromium alloy, aluminum alloy and titanium alloy. The results show that in the clamped state, the actual maximum stress of the lower nippers with the three different alloy materials is much smaller than its permittable stress, and that in the working state, the maximum deformation of the lower nipper using the three different alloy materials are 0.008 mm for titanium alloy, 0.010 3 mm for aluminum alloy, and 0.019 3 mm for chromium alloy. It is clear that when the titanium alloy lower nippers are used, the deformation of the lower nippers is minimal, which is beneficial to improve the gripping state of the upper and lower nippers and hence the quality of combing, and to reduce the loss of spinnable fibers.