Multi-motor drive control technology for draw frame

Abstract

The present invention relates to the field of spinning machinery and equipment, specifically to the multi-motor drive control technology of a sliver lap machine, including a PLC controller, a tension sensor, a display screen, a main controller, a motor driver, a motor, a front lap roller, a rear lap roller, a pressure roller and a drafting part in the machine; the present invention controls the start and stop of the main controller through the PCL controller, and then controls the operation of the front lap roller motor driver, the rear lap roller motor driver and the drafting motor driver simultaneously through the main controller, so that the front lap roller motor driver, the rear lap roller motor driver and the drafting motor driver drive the front lap roller motor, the rear lap roller motor and the drafting motor to run synchronously respectively, improving the speed of spinning cotton laps; at the same time, the tension of the sliver is detected by the tension sensor, the rotation speed of the motor is adjusted in time, and then the tension of the sliver is adjusted to control the quantitative difference between the large and small laps, improving the quality of the cotton lap.

Description

Technical Field

[0001] The present invention relates to the field of spinning machinery and equipment, and particularly to the multi-motor drive control technology of a sliver lap machine. Background Art

[0002] In the current cotton spinning process, the main types of cotton spinning comber sliver lap machines are the roller winding type and the belt winding type. Among them, the roller winding type sliver lap machine has a simple structure and low working cost, but its production speed is relatively low; the belt winding type sliver lap machine has a relatively high production speed, but its machine structure is complex, the production cost is very high, and the requirements for machine production and maintenance are also very high.

[0003] Currently, most manufacturers still use the roller winding type sliver lap machine by extending working hours to meet the output requirements and reduce production costs. The traditional sliver lap machine is controlled by a PLC controller through a frequency converter to control the motor, and then control the gearbox to drive the front lap roller, the rear lap roller, the pressure roller and the middle drafting part of the car. The speed of spinning the cotton lap is relatively slow, and the problem of uneven quality will occur during the process of spinning the cotton lap from a small lap to a large lap. Summary of the Invention

[0004] In view of this, the present invention provides a multi-motor drive control technology for a sliver lap machine, which solves the problems of slow speed of spinning the cotton lap by the sliver lap machine and uneven quality of the large and small laps generated during the process of spinning the cotton lap.

[0005] The multi-motor drive control technology of a sliver lap machine includes a PLC controller, a tension sensor, a display screen, a main controller, a motor driver, a motor, a front lap roller, a rear lap roller, a pressure roller and the middle drafting part of the car;

[0006] The PLC controller is electrically connected to the main controller, and the PLC controller controls the start and stop of the main controller;

[0007] The tension sensor is arranged between the front lap roller and the rear lap roller, and between the rear lap roller and the pressure roller and the middle drafting part of the car. The tension sensor detects the tension of the sliver between the front lap roller and the rear lap roller, and the tension of the sliver between the rear lap roller and the pressure roller and the middle drafting part of the car; the tension sensor is electrically connected to the main controller, and the tension sensor sends the detected tension signal to the main controller;

[0008] The main controller is electrically connected to the motor driver, and the main controller controls the operation, rotation speed and stop of the motor driver; the motor driver is electrically connected to the motor, and the motor driver drives the operation of the motor;

[0009] The motor includes a front coiling roller motor, a rear coiling roller motor, and a drafting motor. The output ends of the front coiling roller motor and the rear coiling roller motor are respectively connected with a front coiling roller and a rear coiling roller, and the output end of the drafting motor is connected with a pressure roller and the in-car drafting part; speed measuring instruments are provided on the front coiling roller, the rear coiling roller, the pressure roller, and the in-car drafting part;

[0010] The motor driver includes a front coiling roller motor driver, a rear coiling roller driver, and a drafting motor driver; the front coiling roller motor driver drives the front coiling roller motor, the rear coiling roller motor driver drives the rear coiling roller motor, and the drafting motor driver drives the drafting motor;

[0011] The display screen is electrically connected to the tension sensor and the speed measuring instrument. The display screen displays the electrical signals received from the tension sensor and the speed measuring instrument, and displays the speeds of the front coiling roller, the rear coiling roller, the pressure roller, and the in-car drafting part. At the same time, the display screen displays the tension of the sliver between the front coiling roller and the rear coiling roller, and the tension of the sliver between the rear coiling roller and the pressure roller and the in-car drafting part;

[0012] The multi-motor drive control technology of the sliver lap machine includes the following steps during the process of spinning the cotton lap:

[0013] S11: The PLC controller issues a start control signal and transmits it to the main controller;

[0014] S12: The main controller sends a start control signal and a speed control signal to the motor driver to control the synchronous operation of the front coiling roller motor driver, the rear coiling roller motor driver, and the drafting motor driver, and the drafting motor driver and the front coiling roller motor driver follow the operation of the rear coiling roller motor driver;

[0015] S13: The motor driver controls the speed of the motor. The front coiling roller motor driver, the rear coiling roller motor driver, and the drafting motor driver respectively drive the front coiling roller motor at a speed of V 1 of, the rear coiling roller motor at a speed of K 1 V 1 of, and the drafting motor at a speed of K 2 V 2 to run simultaneously;

[0016] S14: The front coiling roller motor, the rear coiling roller motor, and the drafting motor respectively control the front coiling roller, the rear coiling roller, the pressure roller, and the in-car drafting part to run at different speeds;

[0017] S15: The tension sensor sends an electrical signal to the main controller, which in turn controls the motor driver to drive the motor, change the motor speed, and adjust the tension of the sliver between the front coiling roller and the rear coiling roller, and between the rear coiling roller and the pressure roller and the drafting part in the machine.

[0018] Further, the multi-motor drive control technology of the sliver lap machine includes the following steps when changing the lap:

[0019] S21: The main controller sends a stop control signal to the drafting motor driver, and the drafting motor driver drives the drafting motor to stop running, thereby causing the pressure roller and the drafting mechanism in the machine to stop running; at the same time, the front coiling roller and the rear coiling roller continue to run;

[0020] S22: Detect the tension of the sliver between the front coiling roller and the rear coiling roller, and between the rear coiling roller and the pressure roller and the drafting part in the machine through the tension sensor;

[0021] S23: The main controller sends a stop electrical signal to the front coiling roller motor driver and the rear coiling roller motor driver, and the front coiling roller motor driver and the rear coiling roller motor driver respectively drive the front coiling roller motor and the rear coiling roller motor to stop running, thereby causing the front coiling roller and the rear coiling roller to stop running.

[0022] The beneficial effects brought by the technical solution provided by the present invention are: controlling the start and stop of the main controller through the PCL controller, and then controlling the operation of the front coiling roller motor driver, the rear coiling roller motor driver and the drafting motor driver simultaneously through the main controller, so that the front coiling roller motor driver, the rear coiling roller motor driver and the drafting motor driver respectively drive the front coiling roller motor, the rear coiling roller motor and the drafting motor to run synchronously, improving the speed of spinning the cotton lap; at the same time, detecting the tension of the sliver through the tension sensor, timely adjusting the speed of the motor, adjusting the tension of the sliver between the front coiling roller and the rear coiling roller, and between the rear coiling roller and the pressure roller and the drafting part in the machine, controlling the quantitative difference between the large lap and the small lap, and improving the quality of the cotton lap. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] Since the speed of spinning cotton laps by the traditional sliver lap former is relatively slow, and during the process of spinning cotton laps, the problem of uneven quality will occur from small laps to large laps; the inventors of the present application provide a multi-motor drive control technology for the sliver lap former, which can effectively solve the problems of slow speed of spinning cotton laps by the sliver lap former and uneven quality of large and small laps during the process of spinning cotton laps.

[0028] As Figure 1 shown, the multi-motor drive control technology for the sliver lap former includes a PLC controller 1, a tension sensor, a display screen 6, a main controller 2, a motor driver, a motor, a front lap roller 51, a rear lap roller 52, a pressure roller, and a middle draft part 53 in the car;

[0029] In this embodiment, the PLC controller 1 is electrically connected to the main controller 2, and the PLC controller 1 controls the start and stop of the main controller 2;

[0030] The tension sensor is arranged between the front lap roller 51 and the rear lap roller 52, and between the rear lap roller 52 and the pressure roller and the middle draft part 53 in the car. The tension sensor detects the tension of the sliver between the front lap roller 51 and the rear lap roller 52, and the tension of the sliver between the rear lap roller 52 and the pressure roller and the middle draft part 53 in the car; the tension sensor is electrically connected to the main controller 2, and the tension sensor sends the detected tension signal to the main controller 2;

[0031] The main controller 2 is electrically connected to the motor driver, and the main controller 2 controls the operation, speed, and stop of the motor driver; the motor driver is electrically connected to the motor, and the motor driver controls the operation of the motor;

[0032] The motor includes a front coiling roller motor 41, a rear coiling roller motor 42, and a drafting motor 43. The output ends of the front coiling roller motor 41 and the rear coiling roller motor 42 are respectively connected with a front coiling roller 51 and a rear coiling roller 52, and the output end of the drafting motor 43 is connected with a pressure roller and a mid-carriage drafting part 53; speed measuring instruments are provided on the front coiling roller 51, the rear coiling roller 52, and the pressure roller and the mid-carriage drafting part 53;

[0033] The motor driver includes a front coiling roller motor driver 31, a rear coiling roller driver 32, and a drafting motor driver 33; the front coiling roller motor driver 31 drives the front coiling roller motor 41, the rear coiling roller motor driver 32 drives the rear coiling roller motor 42, and the drafting motor driver 33 drives the drafting motor 43;

[0034] The display screen 6 is electrically connected to the tension sensor and the speed measuring instrument. The display screen 6 receives the electrical signals of the tension sensor and the speed measuring instrument, and the display screen 6 displays the speeds of the front coiling roller 51, the rear coiling roller 52, and the pressure roller and the mid-carriage drafting part 53. At the same time, the display screen 6 displays the tension of the sliver between the front coiling roller 51 and the rear coiling roller 52 and the tension of the sliver between the rear coiling roller 52 and the pressure roller and the mid-carriage drafting part 53.

[0035] Among them, the multi-motor drive control technology of the sliver lap machine includes the following steps during the process of spinning the cotton lap:

[0036] S11: The PLC controller 1 sends a start control signal to the main controller 2;

[0037] S12: The main controller 2 sends a start control signal and a speed control signal to the motor driver to control the synchronous operation of the front coiling roller motor driver 31, the rear coiling roller motor driver 32, and the drafting motor driver 33, and the drafting motor driver 33 and the front coiling roller motor driver 31 follow the operation of the rear coiling roller motor driver 32;

[0038] S13: The motor driver controls the speed of the motor. The rear coiling roller motor driver 32, the front coiling roller motor driver 31, and the drafting motor driver 33 respectively drive the rear coiling roller motor 42 at a speed of V 1 of, the front coiling roller motor 41 at a speed of K 1 V 1 of, and the drafting motor 43 at a speed of K 2 V 2 to run simultaneously;

[0039] S14: The front coiling roller motor 41, the rear coiling roller motor 42, and the drafting motor 43 respectively control the front coiling roller 51, the rear coiling roller 52, and the pressure roller and the mid-carriage drafting part 53 to run at different speeds;

[0040] S15: The tension sensor sends an electrical signal to the main controller 2, which in turn controls the motor driver to drive the motor, change the rotational speed of the motor, and adjust the tension of the sliver between the front coiling roller 51 and the rear coiling roller 52 and between the rear coiling roller 52 and the pressure roller and the in-vehicle drafting section 53.

[0041] Based on the above embodiments, during the process of spinning the cotton roll, within time t, the rotational speed of the rear coiling roller motor accelerates from 0 to 800 r / s, the rotational speed of the front coiling roller motor accelerates from 0 to 810 r / s, and the rotational speed of the drafting motor accelerates from 0 to 1200 r / s.

[0042] In this embodiment, the multi-motor drive control technology of the sliver lap machine includes the following steps when changing the cotton roll:

[0043] S21: The main controller 2 sends a stop control signal to the drafting motor driver 33, and the drafting motor driver 33 controls the drafting motor 43 to stop running, thereby causing the pressure roller and the in-vehicle drafting mechanism 53 to stop running; at the same time, the front coiling roller 51 and the rear coiling roller 52 continue to run;

[0044] S22: Monitor the tension of the cotton roll between the front coiling roller 51 and the rear coiling roller 52 and between the rear coiling roller 52 and the pressure roller and the in-vehicle drafting section 53 through the tension sensor;

[0045] S23: The main controller 2 sends a stop electrical signal to the front coiling roller motor driver 31 and the rear coiling roller motor driver 32, and the front coiling roller motor driver 31 and the rear coiling roller motor driver 32 respectively control the front coiling roller motor 41 and the rear coiling roller motor 42 to stop running, thereby causing the front coiling roller 51 and the rear coiling roller 52 to stop running.

[0046] Based on the above embodiments, during the entire process of spinning and changing the roll, the rotational speeds of the front coiling roller 51, the rear coiling roller 52, and the pressure roller and the in-vehicle drafting section 53 can be observed through the display screen 6, and at the same time, the tension of the sliver between the front coiling roller 51 and the rear coiling roller 52 and the tension of the sliver between the rear coiling roller 52 and the pressure roller and the in-vehicle drafting section 53 can be observed through the display screen 6.

[0047] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Multi-motor drive control technology for a sliver lap machine, characterized in that, it includes: a PLC controller, a tension sensor, a display screen, a main controller, a motor driver, a motor, a front lap roller, a rear lap roller, a pressure roller and a drafting part in the machine; the PLC controller is electrically connected to the main controller, and the PLC controller controls the start and stop of the main controller; the tension sensor is arranged between the front lap roller and the rear lap roller, and between the rear lap roller and the pressure roller and the drafting part in the machine. The tension sensor detects the tension of the sliver between the front lap roller and the rear lap roller, and the tension of the sliver between the rear lap roller and the pressure roller and the drafting part in the machine; the tension sensor is electrically connected to the main controller, and the tension sensor sends the detected tension signal to the main controller; the main controller is electrically connected to the motor driver, and the main controller controls the operation, speed and stop of the motor driver; the motor driver is electrically connected to the motor, and the motor driver drives the operation of the motor; the motor includes a front lap roller motor, a rear lap roller motor and a drafting motor. The output ends of the front lap roller motor and the rear lap roller motor are respectively connected with a front lap roller and a rear lap roller, and the output end of the drafting motor is connected with a pressure roller and a drafting part in the machine; speed measuring instruments are arranged on the front lap roller, the rear lap roller, the pressure roller and the drafting part in the machine; the motor driver includes a front lap roller motor driver, a rear lap roller driver and a drafting motor driver; the front lap roller motor driver drives the front lap roller motor, the rear lap roller motor driver drives the rear lap roller motor, and the drafting motor driver drives the drafting motor; the display screen is electrically connected to the tension sensor and the speed measuring instrument. The display screen displays the electrical signals received from the tension sensor and the speed measuring instrument. The display screen displays the speeds of the front lap roller, the rear lap roller, the pressure roller and the drafting part in the machine. The display screen displays the tension of the sliver between the front lap roller and the rear lap roller and the tension of the sliver between the rear lap roller and the pressure roller and the drafting part in the machine; the multi-motor drive control technology for the sliver lap machine includes the following steps during the process of spinning a cotton lap: S11: The PLC controller sends a start control signal to the main controller; S12: The main controller sends a start control signal and a speed control signal to the motor driver to control the synchronous operation of the front lap roller motor driver, the rear lap roller motor driver and the drafting motor driver, and the drafting motor driver and the front lap roller motor driver follow the operation of the rear lap roller motor driver; S13: The motor driver controls the rotational speed of the motor. The front take-up roller motor driver, the rear take-up roller motor driver, and the drafting motor driver respectively drive the front take-up roller motor at a rotational speed of V 1 , the rear take-up roller motor at a rotational speed of K 1 V 1 , and the drafting motor at a rotational speed of K 2 V 2 to run simultaneously; S14: The front lap roller motor, the rear lap roller motor and the drafting motor respectively control the front lap roller, the rear lap roller, the pressure roller and the drafting part in the machine to run at different speeds; S15: The tension sensor sends an electrical signal to the main controller, and then controls the motor driver to drive the motor, changes the speed of the motor, and adjusts the tension of the sliver between the front lap roller and the rear lap roller and the tension of the sliver between the rear lap roller and the pressure roller and the drafting part in the machine.

2. The multi-motor drive control technology for a sliver lap machine according to claim 1, characterized in that, when changing the lap in the sliver lap machine, the multi-motor drive control technology includes the following steps: S21: The main controller sends a stop control signal to the drafting motor driver, and the drafting motor driver drives the drafting motor to stop running, thereby causing the pressure roller and the in-car drafting mechanism to stop running; at the same time, the front lap roller and the rear lap roller continue to run; S22: Detect the tension of the sliver between the front lap roller and the rear lap roller and between the rear lap roller and the pressure roller and the in-car drafting part through a tension sensor; S23: The main controller sends a stop control signal to the front lap roller motor driver and the rear lap roller motor driver, and the front lap roller motor driver and the rear lap roller motor driver respectively drive the front lap roller motor and the rear lap roller motor to stop running, thereby causing the front lap roller and the rear lap roller to stop running.

3. The multi-motor drive control technology for a sliver lap machine according to claim 1, characterized in that, the front lap roller motor, the rear lap roller motor, and the drafting motor are all servo motors.

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