Computer Roving Machine: Both Cost Reduction And Labor Intensity Reduction.

Purely mechanical Roving frame The equipment adjustment points are many and complex, not only the labor intensity is big, the maintenance is not convenient, and the spinning parameter adjustment scope of the equipment is narrow, and the adjustment precision is limited, thus affecting the spinning. efficiency And quality. At present, the new generation of computer roving machine with high speed, high efficiency, high mechanical and electrical integration, low labor intensity, high yarn quality and low production cost is becoming the first choice for some textile enterprises. The performance of the FA467E roving machine meets this requirement.

　 roving frame Low energy consumption 

The FA467E roving frame is a new roving machine developed on the basis of FA467C cotton spinning frame. It has made full use of electronic technology, such as computer control, frequency conversion control, CCD tension adjustment, etc. The functions of high-speed computing, large capacity data storage and high-precision digital / analog conversion have replaced the traditional mechanical control devices and information processing devices, and increased the function of many mechanical devices.

The FA467E roving frame has four motor drives, of which the spindle motor M1 drive wing system, the M2 bobbin motor drive winding system, the roller motor M3 spanmission drafting system, the lifting motor M4 drive dragline lifting system. The four motors are independently driven, and are synchronized by the computer through the frequency converter to realize the matching of the four movements. The machine set up 6 encoders, of which UC1~UC4 detected four motor speed separately, encoder UC5 detected dragon tendon position, encoder UC6 detected the front roller speed, and sensor CCD detected the roving machine tension. With the combination of these encoders, sensors and computers. drafting , twisting Synchronous operation of the four movements, winding and forming.

On the basis of the FA467C type cotton roving frame, the FA467E roving machine has cancelled the worm wheel steering box, and driven by the lifting motor to reduce the commutation of the Dragon bar through the positive and negative rotation of the motor. The elevator is installed in the vehicle of the main engine to maximize the operation load of the lifting and spanmission system. The spindle motor, bobbin motor and roller motor are installed in the headstock of the main engine. These motors use the self cooling fan to dissipate heat, which not only reduces the energy consumption of the whole machine, but also improves the reliability of the whole machine. At the same time, the headstock mechanism is streamlined, the air flow is unblocked, and the heat dissipation is easy. The mechanism is adopted to avoid overheating of the headstock due to excessive mechanical and electrical properties. Malady 。 At the same time, the whole machine cancelled all gears except drafting, which is easy to operate and easy to install and maintain.

High accuracy of winding forming control

The change of tension in suspension roving frame and the defects in the forming mechanism of artillery is a serious problem that plagued roving machine in pre spinning. The FA467E roving frame has effectively solved such problems through the above structural design.

In spinning process, spinning tension plays a vital role in spinning quality, and there are many factors that affect spinning tension in actual production, such as changes in ambient temperature and humidity. With the increase of spinning diameter, the roving tension is not consistent in the same doffing process, which requires regular adjustment of spinning tension. For this purpose, three high-precision CCD tension sensors were designed. CCD of roving position is detected to detect roving position between the front roller and twister by 0.01 mm accuracy. The roving position between the roller jaw and the twister is automatically detected, the drooping amount of roving between the roller clamp and the twister is automatically detected, and the detection signal is spanmitted to the computer. The computer compares the measured data value with the setting value of roving reference position, adjusts the running state of the bobbin motor according to the comparison result, controls the droop of the roving in the ideal range, makes the roving tension keep the best during the doffing process, realizes constant tension spinning, reduces the difference between ingots and reduces uneven weight, and obviously improves the yarn quality, especially when the spinning mill changes varieties, this function appears more convenient, accurate and reliable. The machine uses three CCD tension sensors to reduce and eliminate system errors, improve accuracy and reliability. {page_break}

The winding mechanism of the computer roving machine is similar to the traditional suspension roving frame, that is, the roving winding is realized by rotating the bobbin and the flyer relatively, so that it can be easily spanported, stored and used for spinning frame. The main function of the forming mechanism is to change the lifting direction of the dragons by reducing the winding speed of the bobbin and the lifting speed of the dragons, so as to shorten the moving distance of the dragline and make the roving have a certain forming angle. The encoder UC5 on the roving frame of FA467E roving machine sends the signal position of the Dragon tendon to the computer, and sends the input signal to the relevant position, that is, through the touch screen to set the starting position of the dragon's tendon, the commutation distance and other parameters to carry out the operation comparison, so as to realize the shortening of the lifting distance of the Dragon bar, and output the signal to control the Dragon bar commutation, so as to ensure that the roving has a certain forming angle.

In order to facilitate the operation of textile enterprise users, the FA467E roving frame has installed a large touch screen display, and the information communication is more intuitive. The touchscreen of roving frame can display all kinds of data information in the process of running the machine at any time, and give the hints of the equipment failure mode and position, and the adjustment method of the main components.

Special functions of computer roving frame

The computer roving frame has special functions such as detail protection, forming repair, initial winding mode selection, doffing length correction, power failure protection, quick redirection, fixed length, positioning doffing, full yarn twisting, etc.

The anti detail function is manifested in the multilevel adjustable anti detail coefficient. In the process of stopping, the details are produced in the contact part of the roving and the false twister in the process of stopping and stopping, and the spinning is slightly loose in the parking process and the resistance moment of the roving and the false twister is reduced by adjusting the coefficient of detail protection, thus eliminating the details. The function of forming and repairing is that in the spinning process, because of the change of inertia of the dragons and tendons, the shoulder of the spindles will be formed, and the formation of the concave shoulder can be eliminated by adjusting the relevant parameters. In particular, the initial winding mode and the doffing length correction function are that the initial winding method can choose the upper winding or the lower winding according to the different types of bobbin tubes, so as to solve the problem of correcting the initial flying head and the doffing length of the doffing head. When the length of the broken doffing is too long or too short due to different varieties of spinning or other reasons, the length of the broken ends can be adjusted by adjusting the length correction coefficient of the doffing breakage.

Through the optimization control of the program and the real-time voltage detection of the inverter, when the external power suddenly goes off, all the motors of the locomotive will stop at the same time, and the roving will not produce coarse details. This is the power failure protection function of the equipment. The fast commutation function of the Dragon bar is shown by the positive and negative control of the frequency converter by using the forward conversion priority control method to eliminate the conversion stop time. The Dragon tendon is driven by 3 kW high-power motor, which improves the rebar pitch and the response sensitivity, reduces the temperature of the motor and prolongs the service life.

The fixed length and positioning doffing function of the machine is the intelligent calculation of the spinning process, so that when the spindle reaches the fixed length, the position of the dragon's tendon will reach the doffing position, so that the deviation of the length of each doffing will be within 1 meters. The function of roving tape protection is that when the spindle speed is relatively high, the spindle weight will sometimes be caused by the spindle weight when the flyer wing speed is relatively high. By adjusting the setting values of relevant functional parameters, the phenomenon of roving tube can be eliminated by reducing the fixed speed in the process of changing the length of the dragons from top to bottom.

In addition, the equipment also has the function of full yarn twisting, that is, the viscosity of some kinds of yarns is low during the doffing process, and the yarn breaks easily on the top of the flyer when the doffing is broken. At this time, the twist of the doffing roving section can be increased by setting corresponding parameters, so as to ensure that the doffing ends at the pressing palm and improves the yarn breaking efficiency.