CN103901853B - A kind of single ingot single control control system being applied to air yarn cladding machine and control method - Google Patents

Abstract

The invention discloses a single-spindle single-control control system applied to an air-covered yarn machine, including a host computer, a distributed controller and an execution system; the invention also discloses a single-spindle control system applied to an air-covered yarn machine The control method of the single-control control system includes the following steps: 1. The upper computer sets the process parameters and sends them to the distributed controller; 2. Determines whether there is data; 3. Calculates the speed of each motor; 4. Clamps the reel on the clamp arm ;5. Start the running switch; 6. Monitor whether the motor is running normally or whether the yarn is broken; 7. Start the yarn monitoring switch; 8. Determine whether the shuttle is at zero position; 9. Monitor whether the yarn monitoring sensor is working normally; 10. Calculate the thickness of the yarn; 11. Calculate the stroke of the shuttle and the speed of the DC servo motor; 12. Determine whether the number of pulses reaches the preset value; 13. Replace the reel when the yarn is full, and perform steps 1 to 12. It has the advantages of high precision and high production efficiency.

Description

A single-spindle single-control control system and control method applied to an air-covered yarn machine

technical field

The invention relates to an air-covered yarn machine technology in the textile industry, in particular to a single-spindle single-control control system and a control method applied to an air-covered yarn machine.

Background technique

The air-covered yarn machine is a kind of yarn processing machine. It passes the spandex delivered from the spandex feeding device with a certain draft ratio and the untwisted filament (nylon/polyester DTY) through the air covering device in compressed air. Under the action of network wrapping, two or more fibers with different physical properties are intertwined to form a yarn—air-covered yarn. Most of the existing domestic air-covered yarn machines are formed by adding a set of simple spandex conveying device and network nozzle device to the ordinary winding machine. The cost is low, and it is troublesome to change the product variety and change the process. Low-efficiency production of some low-grade or coarse-denier air-covered yarns (such as used in denim clothing), production of fine-denier yarns will cause defects such as many yarn breakages, many leaks, and uneven drafting multiples. In recent years, some new air-covered yarn machines have appeared in China, using frequency conversion speed regulation technology, which reduces the troubles of complex mechanical structures such as process gears and pulleys, and can produce some high-quality fine-denier air-covered yarns. But they all belong to the centralized control type. One machine with multiple spindle positions can only produce one variety with one process, which cannot meet the manufacturer's flexible production requirements of small batches, multiple varieties, and high-tech content. Therefore, the shortcoming and deficiency of prior art are mainly as follows:

1. The control systems of the current air-covered yarn machines are all centralized control types. One machine with multiple spindles can only produce one variety with one process, which cannot meet the flexibility of small batches, multiple varieties and high-tech content of manufacturers. production requirements.

2. The production efficiency is low, the control precision is not high, and the production of fine denier yarns will have defects such as many yarn breakages, many leakages, and uneven drafting multiples.

Contents of the invention

The primary purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and provide a single-spindle single-control control system applied to air-covered yarn machines. The control system is flexible in use, low in cost, high in production efficiency, and suitable for flexible production .

Another object of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide a control method for controlling a single-spindle single-control control system applied to an air-covered yarn machine. The control method is practical, efficient and accurate.

The primary purpose of the present invention is achieved through the following technical solutions: a single-spindle single-control control system applied to an air-covered yarn machine, including: a host computer, a distributed controller and an execution system;

The execution system includes: frequency converter, AC motor, stepping motor, stepping motor driver, AC servo motor, AC servo motor driver, DC servo motor, DC servo motor driver, wire sensor, encoder, proximity switch, gas Road switch and network nozzle;

The upper computer is connected to one end of the distributed controller, one end of the frequency converter, one end of the stepper motor driver, one end of the AC servo motor driver, one end of the DC servo motor driver, a wire sensor, and a proximity switch , one end of the encoder and the gas circuit switch are connected with the other end of the distributed controller; the other end of the frequency converter is connected with the AC motor; the other end of the stepper motor driver is connected with the stepper motor, Used to drive the stepper motor; the other end of the AC servo motor driver is connected to the AC servo motor for driving the AC servo motor; the other end of the DC servo motor driver is connected to the DC servo motor for driving the DC servo motor ; The other end of the air circuit switch is connected with the network nozzle.

The upper computer sends out control signals and controls the air-covered yarn machine to send the control signals to the distributed controller. The control signal contains process parameters, and the distributed controller calculates the AC motor, AC servo motor, and DC servo motor according to the process parameters. and the speed of the stepping motor, when the number of yarns wound on the reel increases, the upward rotation angle of the jig arm increases; the angle value of the jig arm rotation is transmitted back to the distributed controller through the encoder fixed on the jig arm shaft , the distributed controller recalculates the DC servo motor speed through the return value of the encoder; if the yarn breaks or the shuttle exceeds the left and right limits during the yarn covering process, the yarn monitoring sensor and the left and right limit sensors will send signals to the distribution The distributed controller stops the operation of the AC motor, AC servo motor, DC servo motor and stepper motor.

The single-spindle single-control control system of the air-covered yarn machine is connected with a touch screen, and the touch screen is used as the upper computer of the system, which can set the process parameters of yarn winding, check the progress of yarn winding, and check the system error report.

The touch screen and the distributed controller are connected through the RS485 bus, and the touch screen and the distributed controller communicate through the Modbus protocol.

The single-spindle single-control control system of the air-covered yarn machine is also connected with a winding mechanism and a wire-discharging mechanism. The winding mechanism is composed of a DC servo motor, a synchronous wheel, and a synchronous belt; the cable arrangement is composed of a DC servo motor, a steel wire wheel, a guide wheel, a steel wire rope, and a shuttle. The winding mechanism is to drive the reel to roll through the synchronous belt of the synchronous wheel through the DC servo motor. The wire arranging mechanism is to realize the wire arranging function by driving the shuttle to swing back and forth through the AC servo motor through the wire rope. The distributed controller controls the DC servo motor and the AC servo motor, the DC servo motor drives the reel to roll, and the AC servo motor drives the shuttle to swing back and forth to perform winding. The wire sensor is used to monitor whether the yarn is broken, and if the yarn is broken, it will alarm and stop the equipment. The said proximity switch is installed on the wire arranging mechanism and is used to limit the reciprocating movement range of the shuttle. If the limit is exceeded, the whole device will stop running.

Another object of the present invention is achieved through the following technical solutions: a control method for controlling a single-spindle single-control control system applied to an air-covered yarn machine, comprising the following steps:

(1) Set the process parameters of the air-covered yarn machine on the touch screen of the upper computer, and send the data to the distributed controller according to the RS485 bus and Modbus protocol. If the distributed controller receives the data sent by the upper computer, perform step (3) , otherwise execute step (1), and the host computer resends the data.

(2) The distributed controller checks whether it has received the data sent by the host computer, and if so, executes step (3), otherwise executes step (1).

(3) According to the process parameters of the air-covered yarn machine sent by the host computer, the distributed controller calculates the speed of motors V1-V4, AC and DC servo motors, DC servo motors and stepping motors.

(4) Some manual operations before winding, wind the yarn eight times in the unwinding direction on the drafting roller, the main covering roller and the reel, pass through the yarn monitoring sensor, and install the reel on the clamp arm.

(5) Turn on the running switch.

(6) After running for a period of time, check whether each motor is running normally and whether there is any broken yarn in the wound yarn. If the yarn breaks, go to step (4), otherwise go to step (7).

(7) Start the yarn monitoring switch.

(8) Whether the shuttle is at zero position, if it is at zero position, the AC motor, AC servo motor, and DC servo motor will start together, if not at zero position, other motors will not start, only the AC servo motor will run to zero position at a low speed. Then the AC motor, the AC servo motor, and the DC servo motor start together at the set speed.

(9) During the winding process, check whether the yarn monitoring sensor is working normally, if it is normal, go to step (10), otherwise go to step (4).

(10) According to the rotation angle of the jig arm, measure the rotation angle of the jig arm through the encoder fixed on the jig arm shaft, and calculate the thickness of the yarn on the winding drum according to the measured rotation angle of the jig arm.

(11) Feedback the number of pulses measured by the encoder to the distributed controller, and then the distributed controller calculates the stroke of the shuttle and the speed of the DC servo motor. The encoder is fixed on the rotating shaft of the jig arm.

(12) The distributed controller judges whether the angle measured by the encoder reaches the preset value, and if so, executes step (13), otherwise executes step (11).

(13) When the yarn on the reel is full, open the clamp and replace with a new reel. Repeat steps (1) to (12).

The air covered yarn machine includes: drafting roller, main covering roller, clamp, left limit sensor, zero point sensor, guide wheel, steel wire rope, steel wire wheel, AC servo motor, shuttle, reel, right limit sensor , synchronous wheel, synchronous belt, DC servo motor, wire sensor, encoder, jig shaft and jig arm; a wire rope is wound on the wire wheel, and the wire rope is movably connected with the wire guide wheel, and the wire is used to support the wire rope. The shuttle is fixed on the steel wire rope, the AC servo motor is fixedly connected with the steel wire wheel, and the positive and negative rotation of the AC servo motor drives the left and right movement of the shuttle; the encoder is fixed on the jig arm shaft, and one end of the jig arm is hinged on the jig arm shaft , the upper swing of the clamp arm drives the rotation of the clamp arm shaft, thereby driving the rotation of the encoder.

The control principle of the present invention: the upper computer first sets the process parameters according to the requirements of the coated yarn, and sends the data to the distributed controller, and the distributed controller controls its own spindle independently, that is, each spindle develops a distributed controller It is responsible for the start and stop of the corresponding spindle position, the adjustment of process parameters and the connection of the broken yarn alarm, and has the functions of anti-bulge, anti-lap winding, yarn oiling, etc., and measures the winding through the encoder according to the thickness of the winding on the reel thickness, and then return the data to the distributed controller, and the distributed controller makes certain adjustments to the speed of the DC servo motor. Make some adjustments to the rotation angle of the AC servo motor to meet the required winding yarn requirements. In the process of winding yarn, there is a yarn monitoring sensor that can detect whether the yarn is broken; the invention changes the centralized spindle position control to distributed single spindle single control, which enhances the universal scalability of the machine and improves the flexibility. And the speed of data processing ensures that each spindle can be produced independently, efficiently and with high quality.

Compared with the prior art, the present invention has the following advantages and effects:

1. This method adopts distributed control, and a distributed controller is developed for each spindle, which is responsible for the start and stop of the spindle, the adjustment of process parameters and the connection of yarn breakage alarm, and it has anti-bulge, anti-lapping, yarn Oiling and other functions change the centralized spindle position control to distributed single spindle single control, enhance the universal scalability of the machine, improve the speed of flexible operations and data processing, and ensure that each spindle position can be independent, efficient and High quality production.

2. Flexible use, strong practicability, high efficiency and accuracy, and low cost.

Description of drawings

Fig. 1 is a schematic diagram of the single-spindle single-control control system of the air-covered yarn machine of the present invention.

Fig. 2 is a block diagram of the execution system of the single-spindle single-control control system of the air-covered yarn machine of the present invention.

Fig. 3 is a program flow chart of the single-spindle single-control control system of the air-covered yarn machine of the present invention.

Fig. 4 The relative position distribution diagram of the mechanical parts of the air-covered yarn machine.

Fig. 5 The right side view of the relative positions of the winding mechanism parts of the air-covered yarn machine.

detailed description

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example

As shown in Figure 1, the single-spindle single-control control system of the air-covered yarn machine includes a touch screen and a distributed controller. The touch screen is connected to 48 distributed controllers, and each distributed controller is connected to an execution system, as shown in Figure 2. As shown, the execution system includes: four frequency converters: frequency converter V1, frequency converter V2, frequency converter V3 and frequency converter V4, and four AC motors: AC motor V1, AC motor V2, AC motor V3 and AC motor V4 , a stepper motor driver, a stepper motor, an AC servo motor driver, an AC servo motor, a DC servo motor driver, a DC servo motor, a DC servo motor driver, two wire sensors, an encoder, three a proximity switch, a network nozzle and an air circuit switch.

The touch screen is respectively connected with the distributed controller of each spindle. The distributed controller is respectively connected with four frequency converters, a stepper motor driver, an AC servo motor driver, a DC servo motor driver, two wire sensors, three proximity switches and an encoder. The four frequency converters respectively control four AC motors. The stepping motor driver is connected with the stepping motor. The AC servo motor driver is connected with the AC servo motor. The DC servo motor driver is connected with the DC servo motor.

The air-covered yarn machine single-spindle single-control control system is connected with a touch screen, and the touch screen is used as the upper computer of the system to set the process parameters of yarn winding, and to check the progress of yarn winding and system error reporting.

The touch screen and the distributed controller are connected through the RS485 bus, and the touch screen and the distributed controller communicate through the Modbus protocol.

The single-spindle single-control control system of the air-covered yarn machine is also connected with a winding mechanism and a wire-discharging mechanism. The winding mechanism is composed of a DC servo motor, a synchronous wheel and a synchronous belt. The cable arrangement mechanism is composed of an AC servo motor, a wire rope, a shuttle, and a wire guide wheel. The control system achieves the winding function by controlling the DC servo motor to drive the reel to roll and the AC servo motor to drive the shuttle to swing. The wire sensor is used to monitor whether the yarn is broken, and if the yarn is broken, it will alarm and stop the equipment. The said proximity switch is installed on the wire arranging mechanism, and is used to limit the reciprocating movement range of the shuttle. If it exceeds the limit, the whole device will stop running.

As shown in Figure 4 and Figure 5, the air covered yarn machine includes: drafting roller 1, main covering roller 2, clamp 3, left limit sensor 4, zero point sensor 5, guide wheel 6, steel wire rope 7, steel wire wheel 8 , AC servo motor 9, shuttle 10, reel 11, right limit sensor 12, synchronous wheel 13, synchronous belt 14, DC servo motor 15, wire sensor 16, encoder 17, clamp arm shaft 18 and clamp arm 19; The wire rope 7 is wound on the wire wheel 8 and supported by the wire guide wheel 6. The shuttle 10 is fixed on the wire rope. The AC servo motor 9 is rigidly connected to the wire wheel 8. The positive and negative rotation of the AC servo motor 9 drives the left and right sides of the shuttle 10. sports. The encoder 17 is fixed on the clamp arm shaft 18, and one end of the clamp arm 19 is hinged on the clamp arm shaft 18, and the swing of the clamp arm drives the scrolling of the clamp arm shaft 18, thereby driving the rotation of the encoder 17, and the air covering yarn machine See Figure 4 and Figure 5 for the connection relationship of other parts.

As shown in Figure 3, a control method for controlling a single-spindle single-control control system applied to an air-covered yarn machine includes the following steps:

(1) The upper computer touch screen sets the process parameters of the air-covered yarn machine, and sends the data of the process parameters to the distributed controller according to the RS485 bus and Modbus protocol. If the distributed controller receives the process parameter data sent by the upper computer, then Execute step (3), otherwise, execute step (1), and the upper computer resends the process parameter data;

(2) The distributed controller checks whether it has received the process parameter data sent by the host computer, and if it receives it, execute step (3), otherwise, execute step (1);

(3) According to the process parameters of the air-covered yarn machine sent by the host computer, the distributed controller calculates the speed of AC motors V1-V4, AC servo motors, DC servo motors and stepping motors;

(4) Some manual operations before winding, wind the yarn eight times on the drafting roller, main covering roller and reel in the unwinding direction, pass through the yarn monitoring sensor, and clamp the reel on the clamp arm superior;

(5) Start the running switch;

(6) After running for a period of time, check whether each motor is running normally and whether there is any broken yarn in the wound yarn. If the yarn breaks, execute step (4), otherwise, execute step (7);

(7) Start the yarn monitoring switch;

(8) Whether the shuttle is at zero position, if it is at zero position, the AC motor, AC servo motor, DC servo motor and stepping motor will start together, if not at zero position, other motors will not start, only the AC servo motor will run at low speed to zero. Then the AC motor, AC servo motor, DC servo motor and stepper motor run together at the original set speed;

(9) Detect whether the yarn monitoring sensor works normally during the winding process, if it is normal, perform step (10), otherwise, perform step (4);

(10) Measure the rotation angle of the clamp arm through the encoder fixed on the clamp arm shaft, and calculate the thickness of the yarn on the winding drum according to the measured rotation angle of the clamp arm;

(11) Feedback the number of pulses measured by the encoder to the distributed controller, and then the distributed controller calculates the stroke of the shuttle and the speed of the DC servo motor, and the encoder is fixed on the rotating shaft of the jig arm;

(12) The distributed controller judges whether the number of pulses measured by the encoder reaches the preset value, if so, execute step (13), otherwise, execute step (11);

(13) When the yarn on the reel is full, open the clamp, replace the reel, and then perform steps (1) to (12).

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (4)

1. A single-spindle single-control control system applied to an air-covered yarn machine, characterized in that it includes: a host computer, a distributed controller and an execution system; The execution system includes: frequency converter, AC motor, stepping motor, stepping motor driver, AC servo motor, AC servo motor driver, DC servo motor, DC servo motor driver, wire sensor, encoder, proximity switch, gas Road switch and network nozzle; The upper computer is connected to one end of the distributed controller, one end of the frequency converter, one end of the stepper motor driver, one end of the AC servo motor driver, one end of the DC servo motor driver, a wire sensor, and a proximity switch , one end of the encoder and the gas circuit switch are connected with the other end of the distributed controller; the other end of the frequency converter is connected with the AC motor; the other end of the stepper motor driver is connected with the stepper motor, Used to drive the stepper motor; the other end of the AC servo motor driver is connected to the AC servo motor for driving the AC servo motor; the other end of the DC servo motor driver is connected to the DC servo motor for driving the DC servo motor ; The other end of the gas path switch is connected to the network nozzle; The upper computer sends out control signals and controls the air-covered yarn machine to send the control signals to the distributed controller. The control signal contains process parameters, and the distributed controller calculates the AC motor, AC servo motor, and DC servo motor according to the process parameters. and the speed of the stepping motor, when the number of yarns wound on the reel increases, the upward rotation angle of the jig arm increases; the angle value of the jig arm rotation is transmitted back to the distributed controller through the encoder fixed on the jig arm shaft , the distributed controller recalculates the DC servo motor speed through the return value of the encoder; if the yarn breaks or the shuttle exceeds the left and right limits during the yarn covering process, the yarn monitoring sensor and the left and right limit sensors will send signals to the distribution Type controller, distributed controller to stop AC motor, AC servo motor, DC servo motor and stepping motor; The air covered yarn machine includes: drafting roller, main covering roller, clamp, left limit sensor, zero point sensor, guide wheel, steel wire rope, steel wire wheel, AC servo motor, shuttle, reel, right limit sensor , synchronous wheel, synchronous belt, DC servo motor, wire sensor, encoder, jig shaft and jig arm; a wire rope is wound on the wire wheel, and the wire rope is movably connected with the wire guide wheel, and the wire is used to support the wire rope. The shuttle is fixed on the steel wire rope, the AC servo motor is fixedly connected with the steel wire wheel, and the positive and negative rotation of the AC servo motor drives the left and right movement of the shuttle; the encoder is fixed on the jig arm shaft, and one end of the jig arm is hinged on the jig arm shaft , the upper swing of the clamp arm drives the rotation of the clamp arm shaft, thereby driving the rotation of the encoder; It is characterized in that, comprising the following steps: (1) The upper computer sets the process parameters of the air-covered yarn machine, and sends the data to the distributed controller according to the RS485 and Modbus protocols. If the distributed controller receives the sent process parameters, then perform step (3), otherwise, Execute step (1), the host computer resends the data; (2) The distributed controller judges whether it has received the data sent by the host computer, if it has received the data sent by the host computer, then execute step (3), otherwise, execute step (1); (3) According to the process parameters and data of the air-covered yarn machine sent by the host computer, the distributed controller calculates the speed of the AC motor, the speed of the AC-DC servo motor and the speed of the stepping motor; (4) Wrap the yarn eight times in the direction of unwinding on the drafting roller, the main covering roller and the reel, then pass through the yarn monitoring sensor, and finally clamp the reel on the clamp arm; (5) Start the operation switch; (6) Check whether each motor is running normally, whether the wound yarn is broken, if the yarn is broken, then perform step (4), otherwise, perform step (7); (7) Start the yarn monitoring switch; (8) The distributed controller judges whether the shuttle is at the zero position. If the shuttle is at the zero position, the AC motor, DC servo motor, AC servo motor and stepping motor are started together. If not, only the AC servo motor is started. Run to zero position at low speed; then the AC motor, DC servo motor, AC servo motor and stepping motor start together again; (9) Detect whether the yarn monitoring sensor works normally during the winding process, if it is normal, then perform step (10), otherwise, perform step (4); (10) Measure the angle of rotation of the clamp arm by the encoder fixed on the axis of the clamp arm, and calculate the thickness of the yarn on the winding drum according to the angle of rotation of the clamp arm measured; (11) The number of pulses measured by the encoder is fed back to the distributed controller, and then the distributed controller calculates the stroke of the shuttle and the speed of the DC servo motor, and the encoder is fixed on the clamp arm rotating shaft; (12) The distributed controller judges whether the number of pulses measured by the encoder reaches a preset value, if reached, then execute step (13), otherwise, execute step (11); (13) When the yarn on the reel is full, open the clamp, replace the reel, and then perform steps (1) to (12). 2. The single-spindle single-control control system applied to an air-covered yarn machine according to claim 1, wherein the upper computer is a touch screen, and the touch screen is used to set the process parameters of the wound yarn, view The progress of the yarn winding and the error report of the viewing system, the touch screen and the distributed controller are connected through the RS485 bus, and the touch screen and the distributed controller communicate through the Modbus protocol. 3. The single-spindle single-control control system applied to an air-covered yarn machine according to claim 2, wherein the distributed controller is used to receive the data sent by the touch screen, the signal sent by the wire sensor, and the encoder The signal sent and the signal sent by the proximity switch, and calculate the relevant data and control the frequency converter, AC servo motor driver, DC servo motor driver and stepper motor driver as required. 4. The single-spindle single-control control system applied to an air-covered yarn machine according to claim 1, wherein the DC servo motor drives the winding structure to rotate through the synchronous belt of the synchronous wheel, and the said winding The structure is a reel; the encoder is used to measure the thickness of the coated yarn wound on the reel to obtain thickness data, and adjust the winding speed of the DC servo motor according to the measured thickness data; the AC servo motor passes The wire arrangement structure is used for arranging the wires. The wire arrangement structure includes a steel wire rope, a shuttle, a wire wheel and a wire guide wheel. The steel wire rope drives the shuttle to swing back and forth; the distributed controller controls the DC servo motor and the AC servo motor. The DC servo motor drives the reel to roll and the AC servo motor drives the shuttle to move left and right for winding; the wire sensor is used to monitor whether the yarn is broken, and if the yarn is broken, it will alarm and stop the equipment operation; the proximity switch is installed on the cable structure, and is used to limit the swing range of the shuttle to be within the limit of the swing amplitude. If the swing of the shuttle exceeds the limit, the equipment will stop running; the air The circuit switch controls the start and stop of the network nozzle, which is used for covering the yarn.