The spindle is one of the main components for twisting and winding on the spinning machine. It is an assembly with a slender rotary shaft supported by two points as the main body. Improper operation of the spindle not only affects the service life of the spindle itself, but also seriously affects the life of the spindle. Spun yarn product quality and production efficiency.
Example 1
Irregular operation: After tightening the spindle holder nut, use gravity to knock the spindle holder to correct the level of the spindle or the center of the spindle relative to the ring.
For DFG2 type, D12 series, and D32 series spindles, due to the large gap between the spindle outer ring and the rib hole, the design is based on the center of the steel ring as the positioning datum. It is not advisable to tighten the spindle nut sufficiently and then use gravity to knock the spindle holder to adjust the level of the spindle or the center of the spindle to the ring. Such an operation is laborious and not conducive to the adjustment of the spindle. The level is easy to move and the spindle is easily damaged. Rib or spindle surface.
Standard operation: When tapping the spindle holder, use a steel chisel, align it with the side of the spindle holder, and strike at an angle of 20 to 25 degrees. Do not tap the spindle holder nut or below. Do not insert a wrench into a pipe to increase the strength arm to tighten the spindle nut. These practices can easily cause the spindle base to crack or break and be damaged. The tightening torque of the spindle nut is 80 N/m.
Example 2
Irregular operation: add spindle oil while adding oil Insert the spindle into the spindle holder.
D32 series spindles are widely used in cotton spinning mills. Due to the special structure, the spindle oil cannot easily enter the narrow inner cavity of the spindle holder (the layer of the vibration-absorbing coil spring) when refueling. The gap between them is only 0.2 mm). If the spindle is inserted into the spindle holder while adding oil, the spindle oil will overflow, leaving a great hidden danger for the spindle to be short of oil.
Standard operation: When adding spindle oil, the rhythm should be slow. Don’t do it too hastily, let alone miss oil! Leaking oil will definitely burn the spindle. After adding the spindle oil, wait 1 hour before replenishing the oil, and then insert the spindle into the spindle holder.
Example 3
Irregular operation: after the spindle is pulled out, there is no Insert into the original spindle holder or when replacing a bad spindle or bad spindle holder, do not replace the entire set together.
After the spindle has been run, the upper and lower pairs of friction pairs have been run-in. If they are not inserted into the original spindle holder or the complete set is not replaced together, they will have to be worn again. In this way, the spindle will easily become damaged. Numb hands or shaking of the head, large vibration range, causing new wear and tear.
Standard operation: After the spindle is pulled out, it must be inserted into the original spindle holder. When replacing a bad spindle or broken spindle holder, the entire set must be replaced.
Example 4
Irregular operation: incompletely pulling out the spindle Carry out oil replenishment.
If the spindle is not completely pulled out for oil replenishment, the oil cannot be directly added to the rollers of the upper bearing, and good oil replenishment cannot be achieved. If you operate like this for a long time, the spindle rod-disk combination may easily bend and the upper bearing may be damaged.
Standard operation: Completely pull out the spindle and replenish oil.
Example 5
Irregular operation: remove the spindle during equipment maintenance After pulling it out, place it upside down in the gap of the drafting part or place it diagonally on the machine table.
If the spindle is placed upside down or tilted on the machine table, the spindle oil attached to the lower cone part of the spindle will flow back and accumulate in the spindle plate hole. When the spindle is inserted into the spindle holder, the spindle oil will flow to the surface of the spindle holder or dragon ribs, or drip on the ground, causing oil to fly and pollute the ground when driving, and even produce oily yarn.
Standard operation: After the spindle is pulled out, it should be placed vertically on the special spindle car (with an oil storage tray underneath). Before the spindle is inserted into the spindle holder, the lower cone part of the spindle should be wiped with a lint-free cloth to remove the adhered flying particles, waste yarn and impurities.
Example 6
Irregular operation: replace the spindle after pulling it out Traveler.
Standard operation: In order to facilitate the leveling of the spindle and the correction of the spindle to the center of the ring, the replacement of the traveler (especially when prying off the traveler) should be carried out before the spindle is pulled out, so as to Prevent the wire ring from falling into the spindle holder to prevent the spindle from being worn after driving.
Example 7
Irregular operation: spindle cleaning and replacement (supplementary ) After oiling and before starting the machine, the ring plate should not be raised to the highest position, and there is no need to cover both sides of the machine with cloth.
Standard operation: After cleaning the spindle and changing (replenishing) oil, before starting the machine, raise the steel ring to the highest position. Cover both sides of the machine with cloth to prevent it from flying after driving. Oil (mist) affects adjacent machines to produce oily yarn. Stop the machine after driving for 20 minutes, and then use a clean cloth to wipe off the oil splash on the surface of the ring plate, beam, spindle base, etc.
Example 8
Irregular operation: when loading a new spindle If the cleaning and oil changing procedures are not followed, wait for 2 to 3 months of use before cleaning and oil changing.
Standard operation: The new spindle wears violently during the running-in period, and it will inevitably produce tiny particles. If these tiny particles are not removed in time, it will inevitably aggravate the wear and tear of the spindle. wear and tear. The following work should be done according to the new spindle cleaning oil procedure.
Add oil 1 hour after the initial refueling, check the oil level, and lubricate the upper bearing roller. After inserting the spindle, run at low speed 10kr/min~12kr/min for 8 hours and then normal. The spindle speed is run for 1 d~3 d, and the first cleaning and oil change is performed. After 7 d of operation, the second cleaning and oil change is performed; after 15 d~20 d of operation, the third cleaning and oil change is performed, and then the normal operation is performed. Clean and oil change intervals.
After three times of timely and effective initial maintenance, cleaning and oil change, the abrasive particles produced by the initial operation of the spindle can be basically removed, minimizing the harm of initial wear and ensuring that the new spindle is stable and smooth. Good transition to the stable period and normal wear state, which can effectively extend the use of the spindleThe service life lays the foundation for normal spindle maintenance work in the future. It is wrong to clean and change the oil only once after 2 to 3 months of use.
Example 9
Irregular operation: using spindles as tools ( Such as pry bar, punch). Doing so will only cause the spindle to bend, damage the tip and be scrapped.
Standardize operations: Develop good working habits.
Example 10
Irregular operation: suck it up with talcum powder Oil spills and oil splashes on the surfaces of dragon bars, spindle holders and other mechanical parts. This is an extremely wrong approach! Using talcum powder to absorb oil spills or splashes is extremely harmful. The air vortex generated when the spindle is adjusting its rotation can easily bring talcum powder into the spindle holder (which is equivalent to adding abrasive), resulting in serious contamination of the spindle oil, accelerated variation of the physical and chemical properties of the spindle oil, increased spindle vibration, and serious wear and tear of the spindle.
Standard operation: To clean up oil spills or splashes, just wipe them with a cloth.
Example 11
Irregular operation: the spindle has been used for many years and never Do a check to correct for bends.
Standard operation: When the spindle is used for half a year to one year, the spindle should be inspected and corrected for bending. Before correcting the bending, check the condition of the spindle first. If there are grooves, bald spots, or scratches, they should be discarded and scrapped. To correct the bending of the spindle, place both ends of the spindle on a 60-degree V-shaped iron on a flat plate (one end has a backer for positioning) and use a dial indicator to check and measure.
If the bending is out of tolerance, use a small crowbar to press down at the highest point of the bending until it meets the quality requirements. The alignment part should be careful to avoid contact with the spindle tip, the upper taper part of the spindle (that is, the contact point with the “eye of the bobbin”) and the upper bearing. When the spindle plate is eccentric and needs to be corrected, do not pry the spindle plate hole, otherwise it will easily cause the combination of the spindle and the spindle plate to loosen, resulting in numb hands or shaking of the head.
Example 12
Irregular operation: failure to wipe equipment during maintenance Insert the spindle into the spindle holder to remove the flying particles, waste wire and impurities adhering to the lower taper part of the spindle. The cleaning of the spindle surface and the inner cavity of the spindle holder is very important. Any foreign matter entering the spindle holder will affect the lubrication effect, function and service life of the spindle.
Standard operation: Use a lint-free cloth to wipe away the flying particles, waste fibers and impurities adhered to the lower cone part of the spindle, and then insert the spindle into the spindle holder.
Example 13
Irregular operation: equipment maintenance machine stopped When the spindle is not inserted into the spindle holder overnight, do not cover the bearing hole part of the spindle holder with cloth or plastic film.
Standard operation: For machines that need to be parked overnight, when the spindle is not inserted into the spindle holder, special cloth or plastic film should be used to cover the bearing hole of the spindle holder to prevent dust, flying flowers, and debris. Objects falling into the spindle holder will cause variation in oil quality, affect the lubrication effect and even wear the spindle; at the same time, it can also reduce or prevent yarn defects caused by flying particles flying to adjacent machines during cleaning work.
Example 14
Irregular operation: not clearing the spindle tray for a long time The oil flying in the hole accumulates dirt. The existence of these oil flying particles and fouling will undoubtedly increase the rotational resistance of the spindle, causing quality variations caused by reduced spindle speed, increased twisting unevenness, reduced yarn strength, and large spindle differences.
Standard operation: It must be combined with the correction and bending work of the spindle to completely remove the oil dust and scale in the spindle plate hole.
Example 15
Irregular operation: inconsistent spindle belt tension . The spindle belt tension should be consistent across the entire car. If the tension of the spindle belt is too high, it will increase the radial load of the bearing on the spindle, which will easily increase the wear of the spindle and shorten the service life of the spindle. If the tension of the spindle belt is too small, it will easily stall, resulting in a large difference in spindle speed, high yarn twist unevenness, and even less stability. There should be a “death ingot belt”.
Standard operation: The appropriate spindle belt tension should be about 8 N. You can use a spring to hook the spindle belt (in the middle of the two spindles) and pull the spindle belt straight. When the spindle tape frame just swings forward, check the red reading on the spring scale, which is the tension of the spindle tape.
Example 16
Irregular operation: the working position of the spindle belt is incorrect normal.
Standard operation: Carefully position the spindle reel rack at the height, front and rear, and left and right.
High and low position: When the spindle reel frame is in a vertical state, the top surface of the spindle reel should be on the same horizontal plane as the center line of the spindle arc groove. If the horizontal position of the spindle belt is too high or too low, the spindle belt will not be centered. If it sinks, it rubs the bottom of the spindle plate, causing the spindle belt to impact the spindle vibration, and also causes the lower edge of the spindle belt to wear out prematurely; if it floats, it causes the spindle to float upwards, causing abnormal wear of the spindle taper part, which is very harmful.
Front and rear positions: The spindle disk frame should not touch any machine parts after being pushed forward and backward. The front and back swings are natural and flexible without tight rolling, and the swing angles are basically the same.
Left and right position: The spindle belt should not rub against the spindle reel bracket or the side of the spindle reel during rotation. In order to make the arc surrounding the four spindles by the spindle belt as close as possible to reduce uneven twist, the position of the spindle belt tray should be as close to the left as possible, so as to not touch the spindle belt when driving. </p
