Computer-assisted combing process design and combed web quality prediction method

Abstract

The invention discloses a computer-assisted combing process design and combed web quality prediction method. The method comprises the following steps: establishing a mathematical model for a nipper mechanism and a detaching roller transmission mechanism of a combing machine, and fitting corresponding displacement and speed equations at a detaching-jointing stage respectively; measuring the fiber length distribution density in a combed cotton small roll; simulating a fiber layer which is the same as the fiber length distribution density in a practical combed cotton small roll; simulating a fiber layer which is about to be detached and jointed after cylinder combing; simulating a single detached bundle state after detaching and jointing; simulating the form of an output web of the combing machine after six detached fiber bundles are overlapped; calculating the CV (Variable Coefficient) value of the output web, and predicting the web quality; optimally designing a combing process. By adopting the computer-assisted combing process design and combed web quality prediction method, optimal process parameter configuration during combing of different combed small loops can be found out rapidly and accurately, the CV value of the combing web can be predicted, the efficiency of the combing machine is increased greatly, and a basis is laid for improvement on the overall quality of a combing product.

Description

technical field [0001] The invention relates to the technical field of cotton spinning combing, in particular to a method for computer-aided combing process design and combed cotton web quality prediction. Background technique [0002] Cotton spinning combing machine is one of the most complex machines in all cotton spinning equipment. Its working process is: when the nipper swing shaft swings forward and reverse, the nipper swings back and forth through the swing arm and the lower nipper seat. When the nipper retreats, the upper nipper gradually closes. After the nipper is closed, the cylinder needles just turn to the bottom of the nipper to comb the cotton layer to remove short fibers and impurities. After the cylinder carding is completed, the nipper gradually opens and swings forward at the same time. At this time, the separation roller reverses, and the cotton web output from the previous cycle is poured into the machine to overlap with the cotton web sent by the nipper...

AI Technical Summary

Problems solved by technology

[0003] During the working process of the combing machine, there is a very precise coordination between the components (such as the nipper, cylinder, and separation roller). Affect the quality of combed products, and the worst is that the equipment cannot work normally. Moreover, as the speed of combing equipment increases, the consequences of this effect become more and more serious

[0004] At present, the setting of the combing process only depends on the experience and feeling of the workers. Therefore, the quality of the products processed by different cotton mills varies widely with the same equipment, and it is difficult to give full play to the optimal performance and efficiency of the combing machine.

[0005] As the proportion of combed yarn increases year by year, the grade and length of combed cotton decrease, and when the quality index of combed raw materials changes, the setting of combing process must also be changed accordingly. Poor, no suitable process change countermeasures

[0006] In view of the high requirements for the process coordination of the above-mentioned combing machine components, there is currently a lack of scientific and reasonable process parameter selection and configuration methods, and there is no ability to predict the quality of the output combed cotton web

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