Model before transformation：
Model after transformation：
FA1493/FA1494 Series（Three-axis linkage computer roving machine）
1. Photos after transformation (mechanical part)
2. Picture after transformation (electrical part, Danfoss 302 system)
3. Picture of the whole machine after transformation
Model after transformation:
JHF1477/JHF1478 (three-axis non-differential computer roving frame)
1. Photos after transformation (mechanical part)
2. Transmission part
3. Picture after transformation (electrical part, German Luster system)
4. Picture of the whole machine after transformation
Shortcomings of iron gun roving machine:
The machinery is complex, the equipment has many adjustment points, the operation is labor-intensive, the maintenance is inconvenient, the process variety debugging is difficult, the tension control is unstable, and the efficiency is not high.
Design and transformation of iron gun roving frame:
It can solve the related problems of the iron gun roving machine, and achieve the use effect of the computer roving machine after upgrading, with less capital investment and short transformation period, especially suitable for the equipment transformation of the old iron gun roving machine
Effect after transformation
High degree of intelligence: high control accuracy, digital parameter input, user-friendly operation
High efficiency: increased by 30%
High speed: increased by 20%
Low failure rate: reliable and stable electrical control
Low cost: 80% reduction in the number of parts/, and reduction in the workload of car blocking
Low labor force: the labor force is reduced by 30%, and the labor skill is reduced. Brief introduction of JHF1498/1497 series efficient computer roving frame
Because of the irreplaceable nature of the roving process in the traditional cotton ring spinning process, the development of the roving frame has gone through the development stage from the supporting spindle, the suspension spindle, the cone wheel, and the cone wheel. At present, high efficiency, high quality, and automation have become the inevitable trend of the development of the roving frame. The development of digitalization, intelligence, and information makes the roving frame enter a new era of digital control, So far, four-motor computer roving frame is gradually replacing the traditional iron gun roving frame as the choice of cotton mills.
Mechanical structure features:
1. The four-part motion of roller drawing, spindle wing twisting, rib lifting and bobbin winding is driven step by step, and is directly driven by servo motor through synchronous belt; Arc tooth synchronous belt transmission is adopted, with high transmission accuracy, constant speed ratio can be obtained, and the transmission is stable, more suitable for high speed, low noise, no need for oil lubrication, and convenient maintenance;
2. The lifting part of the keel adopts the transmission mode of elastic coupling and worm gear reducer, and realizes the lifting movement of the keel through the positive and negative rotation of the motor; The elastic coupling uses the elastic deformation of the elastic element to compensate the relative displacement of the two shafts, which can overcome the axial, radial and angular deviation, and has high strength, large damping, sufficient damping force, high manufacturing accuracy of the reducer, ensuring low noise during operation and excellent heat dissipation performance;
3. The bobbin transmission adopts cross shaft double universal coupling transmission, with high transmission efficiency, low lubrication requirements, convenient maintenance and long service life;
4. The draft drive part adopts needle bearing structure, which fully guarantees the linear transmission of the draft shaft, and the spinning has no mechanical wave;
5. The spinning speed of the whole machine can reach 1200 rpm for pure cotton and 1400 rpm for blended varieties;
6. The new air suction device can improve and balance the air pressure and air volume, and increase the cleaning effect during spinning, so that the suction negative pressure of the whole roving frame can reach 770-1045Pa from the front to the rear;
Electrical control features:
1. The special roving program controller and servo driver respectively drive the servo motor to reach the designed matching speed to realize the closed-loop synchronous control of four motors; The electrical equipment adopts integrated control mode and is equipped with general frequency converter. The commissioning parameters are simple to set, the operation is reliable, the user's maintenance is convenient, and the operation is simple, thus reducing the technical requirements for electrical personnel;
2. It has human-machine dialogue function. The spinning process parameters and spinning tension parameters are digitalized. The input of spinning parameters is convenient. The touch screen is used as the human-machine dialogue interface. The process parameters and tension parameters are directly input and dynamically displayed. It can realize online process setting, online parameter correction, and roving tension control and adjustment are simple and fast;
3. It has humanized function, can conduct elongation meter test, adjustable photoelectric sensitivity, real-time display function of machine operation status and fault alarm, and can analyze and eliminate faults according to the status of each input and output point, which is convenient for maintenance. The parking positioning function is added to ensure that the ingot wing stops at the same proper position each time, reducing the operation sequence of the car stopper and improving the efficiency; The full-yarn twisting function is added. When spinning chemical fiber and other weak-twist varieties, due to the low twist, the yarn is easy to break at the top of the spindle wing pressing palm when doffing. This function can increase the twist of the doffing roving segment by setting the corresponding parameters to ensure that the doffing automatically breaks at the pressing palm, improve the yarn breaking efficiency, and reduce the workload of the car stopper;
4. The CCD online tension detection device is configured for real-time monitoring and feedback to form an automatic closed-loop control system of roving tension. The program can automatically adjust the roving tension parameters according to the set tension parameters during the spinning process to ensure that the roving is spinning at the spinning tension, making the spinning digital and intelligent, and ensuring high-quality yarn;
5. It has the function of remote centralized monitoring, which can set and modify the process parameters in a unified way to facilitate the efficient centralized management of the cotton mill;
6. The power-off protection mechanism is configured to support the synchronous and rapid shutdown of the four motors through the DC common bus in case of accidental power failure of the machine, so as to avoid causing the details of the whole car or breaking the head;
7. When changing varieties, readjust the spinning process parameters and tension parameters through the man-machine interface, which can better adapt to the user's production of small batches and multiple varieties, and meet the user's need to change varieties at any time;
8. Full yarn fixed length, positioning, directional parking, with precise fixed length doffing function, the length error between each machine and each doffing is ≤ 1 meter, which can realize centralized drum change and overall yarn change, and improve production management efficiency.
Serialized varieties:
At present, the company's main product JHF1498/1497 high-efficiency computer roving frame has been fully serialized, with 194 spindle pitches and 220 spindle pitches, and the length series includes 120, 132, 144 and 156 spindles, which can be selected by users;
1. 194 spindles can be selected for spinning and combing varieties to save production energy consumption;
2. For users of Siro spinning varieties, the configuration of 144 spindles can be adopted, which reduces the number of 10000 spindles of roving frame and makes it more reasonable, and reduces the floor area of the equipment; Reduce the use of car blockers and mechanics, and reduce one-time input costs and production costs;
Practical application of upgrading the iron gun roving frame into computer roving
1、 General situation of iron gun machine
From the mid-1980s to the 2000s, cotton spinning mills mostly used the cone wheel roving frame, commonly known as the iron gun roving frame, because the iron gun type suspension roving frame has made a significant change on the basis of the support frame, and used the suspended spindle wing, which to some extent achieved the functions of high-speed roving and large package.
However, with the development of the roving frame, the limitations of the iron gun roving frame are gradually becoming apparent. The defects of the iron gun roving frame are: the winding tension at each winding diameter is unstable, resulting in the instability of the roving elongation, and the resulting roving deflection and uneven count.
The factors affected are as follows:
1) The initial position of the iron gun belt is affected by human operation, and the initial position of each roving iron gun belt is uncertain;
2) The transmission efficiency and accuracy between the iron gun belt and the iron gun are unstable, and change with the change of the friction coefficient between the belt and the iron gun;
3) The displacement and accuracy of the iron gun belt are affected by the selection accuracy of the tension gear;
4) Affected by the change of ambient temperature and humidity, it will change due to the fineness and length of the fiber;
5) It changes with the change of process setting, and changes with the variation of roving weight, twist, twist coefficient and winding density.
From the perspective of user use, its limitations are as follows:
1) The machine is complex, the equipment has many adjustment points, the labor intensity of operation is large, and the maintenance is not convenient. Because the use of gears drives the belt to move, there are many gears, which will cause problems such as cannon wear and belt damage after long-term operation, so the gears and cannon belts need to be replaced frequently, and the replacement is very inconvenient, resulting in large maintenance workload of roving machine users, and the adjustment is difficult, and the spinning efficiency is greatly affected by frequent and irregular shutdown and maintenance;
2) Influenced by the manufacturing accuracy of the forming iron gun, the uneven speed change causes the instability of yarn tension control, which makes it more difficult for the barricade to stop the car, and causes irregular roving weight and poor evenness, which affects the roving quality control.
3) The workload of process adjustment is large. Six kinds of gears need to be adjusted for trial spinning of a variety to approach the designed spinning parameters. The range of adjustment is narrow and the range of variety adaptation is limited. Many gears need to be replaced when changing the variety again. The roving tension adjustment is complex and sometimes unexpected.
4) Spinning quantitative limit: When spinning high-count or ultra-coarse count yarn, especially when the roving quantitative is less than 3g/10m or more than 9g/10m, the density lifting gear cannot adapt to normal production and cannot be adjusted to the appropriate parameter value.
In view of the problems existing in the above roving frames, we adopt modern electronic control technologies such as computer, electronic detection technology and electronic and electrical control actuators to replace the current adjustment mode of mechanical gear transformation; The traditional roving frame is reformed and designed, and the CCD online detection and high-precision frequency conversion speed regulation technology are adopted to implement and apply on the roving frame, which solves the problem of unstable elongation of the original iron gun roving frame for a long time. The optimized design makes the complex mechanical transmission mechanism simpler, greatly reduces the maintenance work, improves the stability of the equipment, and reduces the failure rate of the equipment; At the same time, computer technology is used to realize online process setting, reflect yarn quality online, and modify settings online, which makes the roving machine have human-computer dialogue function, that is, the so-called computer roving machine. Therefore, high efficiency, high quality, and automation have become an inevitable trend of development. The development of digitalization, intelligence, and information makes the roving machine enter a new era of digital control. So far, four motors The computer roving machine with more motors is gradually replacing the traditional iron gun roving machine as the choice of cotton mills.