The Method Of Making The Doffing Spinning Machine More Economical And Reliable

< p > group < a href= "http://www.91se91.com/news/index_c.asp" > doffing spinning machine < /a > is the main spinning equipment introduced in recent years. The whole spinning process can realize full automatic operation, shorten the doffing time, and save the manual finishing of empty bobbins. The whole equipment is highly automated, labor productivity is high, and the labor intensity of workers is low. At present, the reliability and stability of the collective doffing spinning long car is an important problem that puzzles the equipment manufacturing enterprises and the enterprises of < a target= "_blank" href= "http://www.91se91.com/" > textile > /a. In order to realize the economic and reliable operation of the collective doffing device, this column introduces the practices of Hubei Wuhan Jiangnan Industrial Group Co., Ltd. and Jingwei Limited by Share Ltd Yuci branch. < /p >
< p > < strong > method 1 strengthening maintenance and maintenance < /strong > < /p >
< p > < strong > play < /strong > < a > href= > http://www.91se91.com/news/index_c.asp > > strong > collective doffing device < /strong > /a > strong > effect > /strong > < > > > > > > > > > /a > strong >
< p > Hubei Wuhan Jiangnan Industrial Group Co., Ltd. Ji Wan Ping < /p >
< p > 2010, our company installed 61 sets of collective doffing devices in succession. Since the normal operation, the production efficiency and spinning quality of enterprises have been improved, which has basically reversed the situation of many labor, high labor intensity and low production efficiency in the spinning process, and achieved good results. Through the use, we found that strengthening the collective doffing part maintenance can make the collective doffing device play a greater role. < /p >
< p > we mainly defend the collective doffing from the following aspects. The device button is operated by a special person to prohibit unfamiliar people from operating the equipment. No signal switches and switch seats are prohibited to prevent any electrical signals from causing displacements, and the position of the mobile switch is prohibited and the sensitivity of the photoelectric switch is adjusted. < /p >
< p > maintenance personnel should check the punch and grab pipe on time. If the replacement of the grab pipe is not timely, it will cause air leakage and affect normal operation. After the disc is damaged, it should be replaced in time. It is forbidden to increase or reduce the convex disk at will, so as not to cause the misalignment of the convex disk. < /p >
< p > every running class should check the operation of spade yarn regularly, < a href= "http://www.91se91.com/news/" > doffing device < /a > normal operation. If abnormal phenomena are found, the pipe should be stopped in time and the doffing will be continued after removing the problem. Before the collective doffing is run, check whether there are obstacles on both sides of the machine, whether there is any debris on the guide plate, whether the full bobbins and empty bobbins are delivered, whether the positions of the convex plates and the pipe gripper on the left and right sides are positive; check whether there are bobbins on the middle position pipe bolts; control the time of doffing, and avoid the use of collective doffing devices at the same time for two adjacent cars, so as not to cause injury to personnel. < /p >
< p > when the collective doffing is running, it is forbidden to insert the empty bobbin into the spindle when the collective doffing is not completed, so as to avoid damaging the pipe grasping device. When the collective doffing is run automatically, personnel monitoring should be arranged. Through these maintenance, we can see that the spinning quality of the JWF1520 spinning frame is 18.5% higher than that of the FA506 spinning frame, especially when the spindle is broken. < /p >
< p > < strong > method two improving intermediate installation technology < /strong > < /p >
< p > < strong > improving the reliability of collective doffing < /strong > < /p >
< p > Jingwu Limited by Share Ltd Yuci branch Loutang Yun < /p >
< p > through production practice, we find that the key assembly links affecting the quality of the collective doffer are: the straightness of spindle center, the consistency of the air frame, the consistency of the inlet and outlet, the straightness of the pallet, the positioning and adjustment accuracy of the middle position pipe bolt, and the quality of the electrical control system and the detection device. In order to further improve the reliability of collective doffing, we mainly studied the location and requirements of the location. < /p >
< p > the installation position of the middle position pipe plug directly affects the pipe inserting and pulling out the bobbin. To solve this problem, we made drilling tools to ensure that the center distance tolerance of each pipe bolt was + 0.1 mm, which ensured the positioning of the middle position pipe bolts. The forming of intermediate position is formed by roll forming. After processing, it should be repeatedly straightened to ensure its straightness and flatness requirements. At the same time, we must strictly control the coaxial degree of injection molding. Through the precision control of the injection mold and the positioning control of the bolt, the injection molding process and inspection mechanism can be strengthened to ensure the quality of the plastic parts of the pipe bolt and avoid the offset and skew of the middle position pipe bolt after the combination. < /p >
< p > installation design improvement. Through the analysis of the structure and existing problems, the product structure and assembly relationship have been redesigned. The scaffold is changed from the original eversion to the inward form. After the combination, the contact surface of the middle bracket increases, and the force is changed from the outward tension to the downward pressure, which relieves the stress deformation of the original structural gas frame after being pressed down. < /p >
< p > support structure is increased after bracket structure is improved. When adjusting, use the gas holder to grab the bobbin and drop to the bottom of the bobbin 5 mm from the top of the pipe bolt. The first adjustment of the middle position pipe plug of each spindle is centered on the bobbin, then the gas holder is lowered into the pipe bolt, and the straightness is checked at the top of the bobbin to check the straightness of the middle position pipe bolt. If a middle pipe bolt deviates, the pipe support can be adjusted. Through analysis and research, through the improvement of the processing technology, installation method and structure of the intermediate position, it can fundamentally overcome the past problems and effectively improve the reliability of the operation of < a href= "http://www.91se91.com/news/" > collective doffing long vehicle < /a >. < /p >
< p > < strong > method three design automatic doffing device < /strong > < /p >.
< p > < strong > transformation of old spinning frame < /strong > /p >
< p > Zhu Baoli, < /p >, School of Aeronautical Manufacturing Engineering, Nanchang Aeronautical University.
At present, in addition to some advanced spindles and long spinning frames adopted by collective automatic doffing, there are still a lot of old spinning frames without collective automatic doffing in China. P The spinning machine with the collective automatic doffing device costs too much, and many a href= "http://www.91se91.com/news/" > textile enterprises < /a > can not afford such a high price. Most spinning machines still use artificial doffing, but there are still many shortages, such as excessive employment, high labor intensity and low production efficiency, so developing the automatic doffing device suitable for the old spinning frame is a pressing matter of the moment. < /p >
< p > the overall design scheme is mainly made up of the grasping pipe part, the empty pipe part, the moving part and the battery pack. The box part of the automatic doffing device is welded out of the framework by the angle iron, and a panel can be opened outside, and the handrail is arranged on the left and right sides of the box, which is used for manually pushing and pulling the automatic doffing device. The automatic doffing device is equipped with a positioning electromagnet. The positioning electromagnet is equipped with a positioning electrode. When the automatic doffing device reaches the parking place, the electromagnetic iron is energized to push out the positioning electrode and contact with the short circuiting ring to stop the advance. The pulley installation board of the automatic doffing device is equipped with a directional pulley with wheels and grooves, which is used for connecting the directional guide of the spinning frame, driving by two front wheels, and the rear wheel is a universal driven pulley. When the infrared receiving device on the automatic doffing device receives the doffing completion signal transmitted by the infrared transmitting device on the spinning frame, the automatic doffing device starts to work. The grasping mechanism completes the work of grasping the bobbin, and the discharge mechanism completes the work of emptying the bobbin, and the controller completes the functions of user instruction input, operation display, working state indication, and storage battery voltage monitoring. < /p >
< p > the air traffic control part is made up of 3 parts: the air traffic control box, the air pipe push rod group and the rotating pallet. The bottom of the ATC box is equipped with 10 zigzag grooves and horizontally aligned with the rotating pallet. 10 empty empty bobbins are designed on the rotating pallet, 3 groups of empty pipe push rods are installed on the other side of the ATC, and the sawtooth grooves at the bottom of the ATM box are horizontally aligned with the push rod group. The stepper motor drives the push rod group to pass through the sawtooth shaped groove at the bottom of the ATC box, pushing the empty bobbin of the empty pipe box into the empty space of the rotating tray. < /p >