Research And Development Of Digital Single Carding Unit Comber

Cotton spinning comber is a key equipment for the production of high-grade yarn and fabric products and an important support for the high quality development of Chinese textile industry.After a long time of development,domestic cotton spinning comber has made remarkable achievements in spinning speed and spinning quality,but there are still great limitations.The traditional cotton spinning comber mostly adopts the pure mechanical transmission mode,the transmission system is complex,the digital and intelligent level is low,the adjustment of process parameters need to replace a large number of mechanical parts,labor and time.At the same time,the vibration and noise of the mechanical transmission system are larger at high speed,which affects the further improvement of the speed of the comber.Servo control technology is an important means to realize digitalization and intellectualization of textile machinery,but the application of servo control technology in cotton spinning comber is little at present.In addition,cotton spinning combing products present the development trend of "multiple varieties,small batch",the existing eight carding units cotton spinning comber is difficult to adapt.Therefore,the research and development of digital single carding unit comber driven by servo motor is of great significance to simplify the transmission mechanism,reduce the noise,vibration and impact generated during movement,optimize the process adjustment mode and adapt to the market demand.Starting from the single carding unit comber,based on the traditional cotton spinning comber,the following work is carried out: First,the dynamic model of the separation roller and the separation roller and the equivalent dynamic model of the servo drive system of the separation roller are established.The variation law of the output torque of the servo drive system and the inertia torque of each component in a working cycle is calculated.The output torque of the servo motor of the two different drive systems of the separation roller is compared and analyzed.The optimal servo drive system and gear tooth ratio are obtained,and the digitalization of servo motor drive,lap scale adjustment and motion curve setting of various separation rollers are realized,which can meet the needs of different fibers in separation drafting.Secondly,the servo motor drive system of coiling roller,surface press roller and draft roller was developed,which greatly simplified the transmission mechanism of each component,realized the digitalization and continuity of the adjustment of coiling tension,table tension and drafting device’s draft multiple,and the operation was simple and convenient.Thirdly,according to the amount of falling cotton of the single carding unit comb,using the principle of pneumatic conveying,the air volume,wind speed and air pressure are determined reasonably,the conveying pipe,the volume of the filter box and the parameters of the filter screen are designed,and the fan model is selected,and a new dust filter system suitable for the single carding unit comb is developed.Fourthly,on the basis of the above research,the three-dimensional simulation model of the single carding unit comber is established,and the digital single carding unit comber is developed.Fifthly,in order to determine the number of parallel strips after single carding unit combing,the whole process spinning experiments of 1 and 2 parallel strips after combing were designed respectively,and the yarn quality was tested and analyzed.The results showed that the yarn quality of 2 parallel strips after combing was obviously better than that of 1 parallel strips.