1. Objectives of the experiment 1. The observation value of the combing cover electrode force was changed to understand and analyze the combing force of the beam split sliver. Carding machines are used to process cotton fibers and chemical fibers and belong to textile machinery. According to the spinning process, carding is an important process.
The front process of the carding machine is the opening and cleaning machine, and the latter process is the drawing frame (carding process) or the sliver coiler (combing process). During the spinning process of the spinning frame, the semi-finished roving or sliver is drafted, twisted, and wound into a spinning machine. The combed sliver and the needle-carding machine combine the sliver, the needle row is drafted to improve the sliver structure, and the roving is further spun into spun yarn on the ring spinning frame, which is the main spinning machine. The structure of the double twisting unit of the double twisting machine mainly includes the spindle braking device, the spindle part of the double twisting machine, the yarn winding device, and the special device of the double twisting unit.
2. By analyzing and measuring the carding force in different geographical locations of the cover work area, we can understand the fiber carding state of the students in different social positions. 3. Change the process parameters to understand the change of carding force in different processes. 2. Basic knowledge On the carding machine, the action area between the cylinder and the cover is a large carding action area, which is responsible for the main carding action.
Since the opening of the licker-in layer cannot be completely decomposed into fiber bundles and fibers, the flat decomposition of the cylinder and fiber bundles continues to be exerted. When the cylinder head and carded fibers, fiber bundles (or blends) are treated simultaneously in the action of the two comb members in the action of the area. Due to the speed difference of the two parts, the distance between the tips of the fiber aggregates in contact increases, and a certain tension is applied to the fiber bundles on the surface of the same two pins.
And the fibers act on the pins according to a certain resistance, such as the force during carding. Carding force The force acting on the fiber direction, its magnitude and the amount of feed, the needle tooth structure, the relative speed of the working parts, the contact force between the fiber and other factors related to each other, the main force of the impact carding the fiber. During operation of the carding machine, the higher drum surface speed, the gap between the cylinders and the flats, the carded fiber bundles and direct observation are not easy to measure.
This experiment uses a measurement technique to measure the combing force with a certain reliability to find out which properties of combing, combing components and methods for improving the level of improvement are favorable. Generally speaking, the analysis of the important effect of fiber carding in the research area mainly reflects the effect of students on bundle fibers and block fibers. The obvious form of pulse signal is called pulse opening force. The opening force measured by this experimental teaching method is the cotton bundle opening force.
During the test, the caps 4 had three, comb-mounted force sensors on the appropriate part of each cap, a schematic view of the structure shown in the figure. 2-1. Figure 1 is a 1 cmz light weight needle active area, the needle attached to the surface of the cantilever beam 2 strain fixing plate 3.
When subjected to the active force of the combing needle, the action of the strain gage and cantilever deformation, with the change of the resistance value of the strain gage force, changes the combing. The signal is converted by the strain gage into an electrical signal to the strain gage signal which is processed and recorded with a computer data processing system. 3. Experimental equipment and appliances One carding machine, one carding force sensor, one dynamic analysis strain gauge, one function data recorder (or light passing oscilloscope), one silicon code box, and several cotton laps.
Fourth, the experimental content 1. Adjust the process parameters of the carding machine to make it in the required normal operation state. figure 2. Check the installation position of the carding force sensor to see if the end face of the head is parallel to the flat face.
After adjustment, install the cover with sensor on the card. 3. Used to connect the instrument. Turn on the instrument about 0.5B to warm up.
4. Adjust the balance of the strain gauge. After all these instruments are adjusted to the normal management work and life state, the system calibration is carried out. Start the test card.