There are many kinds of transformation of spinning plant equipment on the market, which are successful and ineffective. Here are three more effective ways of spinning frame transformation to share with you. I hope you can comment on them.
Method 1 design a new driving system
Increased automation
A513 spinning frame adopts a single motor, which is driven by open gear. It has a large amount of maintenance work, poor sealing and easy to form oil pollution. The lifting and forming cams of steel ring plate are easy to wear, produce impact force and inconvenient process adjustment, which can not meet the needs of spinning at present. Based on the analysis of the drive system of domestic and foreign advanced spinning frame, combined with the existing multi axis drive technology, the technical personnel of our company put forward a set of transformation scheme of the drive system of spinning frame with its own characteristics and advantages.
The transformation plan cancels the transmission mode of the open gear. The roller adopts the asynchronous motor with encoder to control the speed of the roller precisely in the closed loop. At the same time, the speed of the spindle is sampled in real time, and the PLC controls the front roller motor to change with the spindle speed through the frequency converter. The control system also adopts the DC bus technology, that is, in the case of sudden power failure, the main frequency converter with large capacity supplies power to the front and middle rear roller frequency converters, so that the front and middle rear rollers follow the inertia of the main motor and stop synchronously to avoid large-area disconnection.
Combined with the previous research, Fengwei PLC, Delta pws6800c human-machine, Dongyuan servo motor and Dongyang frequency converter were used for transformation. First, the drafting gear of spinning frame and the lifting cam of steel ring plate are removed, and the motor is installed on the newly designed steel wall plate for transformation. Then the process parameters are input to realize the multi axis CNC transmission of traditional spinning frame. After the test operation, the automation and flexibility of the modified traditional spinning frame are improved, the operation of the car stopper is convenient, and the failure rate of the equipment test process is low.
Method 2 is transformed into hollow roller compact spinning
Better yarn quality
In cooperation with universities, our company has carried out the transformation of hollow roller compact spinning on fa1516 spinning frame and successfully spun jc11.7tex compact spinning with high quality.
The transformation process of hollow roller compact spinning is as follows: the front roller with a diameter of 25 mm is replaced by the hollow roller with a diameter of 50 mm. In order to keep the linear speed of the modified hollow roller consistent with the surface of the modified roller, it is necessary to reduce the angular speed of the front roller by half. Therefore, a pair of driving gears 50t and 32t of the front roller head of fa1516 spinning frame are changed to 36t and 46t. After replacing the front roller with a hollow roller with a diameter of 50 mm, the height of the T-shaped lower pin should be changed from 14 mm to 12 mm, which can effectively improve the friction between the lower apron and the hollow roller. In addition, the angle between the front roller seat and the horizontal plane of the spinning frame should be changed from 45 ° to 30 °, and the position of the middle and rear roller should be adjusted to ensure that the three roller spinning plane is in the same plane, and the installation angle of the xusen type plate spring cradle should be adjusted at the same time.
We use the modified hollow roller compact spinning device to spin jc11.7tex compact yarn successfully on fa1516 ring spinning frame, and compare the spinning quality with traditional ring spinning and xusen grid ring compact spinning. The practice shows that the yarn quality after modification is significantly higher than that of traditional ring spun yarn; compared with the close spinning of xusen grid ring, the yarn quality is slightly better, the strength and elongation performance is equivalent, the harmful hairiness of 3mm is slightly worse, but the hairiness of 1mm-2mm is retained more, which is conducive to improving the fabric style.
Method 3 expand the upper mouth of cotton suction pipe
Reduce the hole blockage of cotton suction pipe
The eyelet of the suction pipe of the company's ring spinning testing machine is very easy to be blocked. According to the analysis of the technicians, the fiber sucked in by the holes at both ends of the cotton suction pipe has a long transportation distance in the pipe cavity, which is easy to stagnate in the chute cavity due to the burr, rust or resistance between the fibers in the pipe; in addition, the suction of the holes at both ends is weak and easy to be blocked due to the uneven suction of the pipe cavity in this form.
According to the above analysis, an improved suction pipe is designed, which is mainly to expand the upper mouth of the suction pipe to 280 mm, the length to 60 mm and the diameter of the lower end to be the same. The two ends of the upper mouth of the cotton suction nozzle are just between the 2 and 3 holes, 6 and 7 holes, which are the places where the fibers are easy to accumulate. The accumulated fibers directly enter the cotton suction nozzle and are easy to be discharged. The two ends of the upper mouth of the original cotton suction nozzle are located at 4 and 5 holes, which are almost at the right angle to the mouth of the cotton suction nozzle. After improvement, there is no such problem; the shortest horizontal distance between the holes at 1 and 8 ends and the cotton suction nozzle is reduced, which is more than half of the original one; and the volume of the cavity in the new cotton suction nozzle increases, which allows the accumulation of large fiber capacity and a long filling time. In addition, the entire cavity of the assembly Suction is much more uniform than before, thus reducing blockage. In actual installation, the connecting pipe shall be shortened accordingly. The results showed that the average number of times of clogging per hour was less than that of the original suction tube.
