WO2016206326A1 - Sizing machine tension control system based on plc and engineering frequency converter - Google Patents

Abstract

Disclosed is a sizing machine tension control system based on PLC and an engineering frequency converter. The sizing machine tension control system comprises a sizing machine. A programmable controller, a tension frequency converter, a coder, a display module, a vehicle speed sensor, a motor rotating speed sensor and a power supply module are disposed on the sizing machine. The tension frequency converter, the coder, the display module and the power supply module are connected to corresponding ports of the programmable controller. The vehicle speed sensor and the motor rotating speed sensor are each connected to the programmable controller sequentially by means of an analog-to-digital conversion circuit and an amplification circuit. In the present utility model, a weaving axial tension control system of the sizing machine is refitted to be controlled by the frequency converter, so that the tension value of the weaving axial tension control system of the sizing machine can be easily adjusted; the control system is refitted to be semi-automated, control is easier, monitoring is convenient, and the repair amount is decreased.

Description

Sizing machine tension control system based on PLC and engineering inverter Technical field

The utility model relates to a tension control system, in particular to a sizing machine tension control system based on PLC and engineering type frequency converter, belonging to the field of tension control.

Background technique

Tension control, in layman's terms, is to control the force that keeps objects elongated or taut when they are being taken. Tension is used in the widest range of light industry such as paper, fiber, plastic film, wire, printed matter, tape, etc. The tension of the strip or wire is critical to the quality of the product. In order to ensure the quality and efficiency of production, it is important to maintain a constant tension during the winding and unwinding process.

In the metallurgy, papermaking, textile and other industries, in the process of processing or after the completion of processing, the last process is generally to wind the processed product into a cylindrical shape. In this process, the quality of the winding will be the key to determine the quality of the product. The volume is too tight, the fabric is easily deformed, the fabric is broken, the coil is too loose and the coiling is not compact, which is not conducive to handling and transportation. Therefore, in order to achieve compact winding and ensure the quality of the product, it is required to establish a certain tension on the fabric during the winding process and maintain the tension at a constant value. The system capable of realizing this function is called the tension control system. . At present, the tension control system applied has three main principles according to its measurement control: indirect method tension control system; direct method tension control system; and composite tension control system with indirect method and direct method.

According to the classification of control methods, the tension control can be generally divided into three types: manual, semi-automatic and fully automatic; the winding diameter control method can automatically detect the winding diameter to adjust and compensate the tension actuator to achieve constant tension. The roll diameter control method is a semi-automatic control mode. Its outstanding feature is that it eliminates the relatively expensive tension sensor, which is easy to install and can easily obtain taper tension control. It is especially suitable for metallurgy, printing, packaging, paper making, printing and dyeing industries. Cutting and winding machines.

The tension of the slasher directly affects the yield. The old sizing machine uses a mechanical transmission mechanism with a narrow tension adjustment range. As the mechanical parts of the equipment age wear, the tension gradually decreases. The inconvenience of replacing mechanical parts and the high cost of the company prompted the company to make up its mind to transform it.

For example, a tension control device of the application number "201310193026.8" is used in a roll-to-roll rolling apparatus to control the tension of the winding, the roll-to-roll rolling apparatus includes a take-up reel, and the tension control device includes: a thickness a measuring unit located on the take-up reel for measuring a thickness of the web on the take-up reel; a processing unit according to the thickness The thickness measured by the measuring unit calculates the tension value of the winding; and the control unit receives the tension value output by the processing unit to control the tension of the winding. The tension control device can control the tension on the take-up reel to vary according to the thickness of the web, thereby preventing the surface of the web from being scratched during winding.

Further, a tension control device of the application number "201410600667.5" is composed of a driving portion, a tension control portion, and an output guide roller, and the driving portion has a driving roller, a nip roller, a nip roller driving member, and a driving roller driving member, and is driven. The roller is connected with the driving roller driving part, the nip roller is connected with the nip roller driving part, the driving roller is matched with the nip roller, and the tension control part comprises a block component, an induction component, a swinging lever, an adjusting guide roller, an adjusting component, and the swinging lever rotates The utility model is mounted on the adjusting component, the induction component is fixed on the swinging bar, the adjusting roller is fixed at one end of the swinging bar, the fixed block component is fixed at the other end of the swinging bar, the conveyed material is passed around the output guiding roller, the guiding roller is adjusted and connected to the driving roller, and the pressure is pressed. Between the feed rolls, the angle between the materials being conveyed on both sides of the adjustment guide rolls is less than 180 degrees.

Utility model content

The technical problem to be solved by the utility model is to provide a sizing machine tension control system based on PLC and engineering type inverter for the deficiency of the background art.

The utility model adopts the following technical solutions to solve the above technical problems:

A sizing machine tension control system based on PLC and engineering type frequency converter, comprising a sizing machine, wherein a programmable controller, a tension frequency converter, an encoder, a display module, a vehicle speed sensor and a motor speed are arranged on the sizing machine a sensor and a power module; the tension converter, the encoder, the display module and the power module are connected to corresponding ports of the programmable controller, and the vehicle speed sensor and the motor speed sensor are sequentially connected by an analog-to-digital conversion circuit and an amplifying circuit. Programming controller

The amplifying circuit includes an amplifier chip, a first resistor, a second resistor, and a third resistor. The output ends of the analog-to-digital conversion circuit are respectively connected to one ends of the first resistor and the second resistor, and the other end of the second resistor is connected to the anode of the amplifier chip. The anode of the amplifier chip is connected in series with the third resistor and grounded to the other end of the first resistor, and the voltage output terminal of the amplifier chip is connected to the programmable controller.

As a further preferred embodiment of the sizing machine tension control system based on the PLC and the engineering type inverter, the chip type of the programmable controller is EC20-3232BRA.

As a further preferred embodiment of the sizing machine tension control system based on the PLC and the engineering type inverter, the chip type of the tension converter is EV3300-4T0220G.

As a further preferred embodiment of the sizing machine tension control system based on the PLC and the engineering type inverter, the chip type of the encoder is ES3-062N6941.

As a further preferred embodiment of the sizing machine tension control system based on the PLC and the engineering type inverter, the vehicle speed sensor adopts a Hall type vehicle speed sensor.

Compared with the prior art, the utility model has the following technical effects:

1. The utility model has the advantages of simple structure, easy realization and high measurement precision;

2. The utility model has good anti-interference performance, can complete the control effect well, and is stable and reliable in operation;

3. The utility model adjusts the tension control system of the sizing machine woven shaft by the frequency converter, so that the tension is easy to adjust; the control system is modified to make it semi-automatic, easier to control, convenient to monitor and reduce maintenance.

DRAWINGS

Figure 1 is a schematic structural view of the utility model;

2 is a circuit diagram of an amplifier circuit of the present invention.

detailed description

The technical solution of the utility model is further described in detail below with reference to the accompanying drawings:

As shown in Figure 1, a sizing machine tension control system based on PLC and engineering inverter, including a sizing machine, is characterized in that: a programmable controller, a tension converter, and a code are provided on the sizing machine. The device, the display module, the vehicle speed sensor, the motor speed sensor and the power module; the tension converter, the encoder, the display module and the power module are connected on corresponding ports of the programmable controller, and the vehicle speed sensor and the motor speed sensor are in turn The programmable controller is connected through the analog-to-digital conversion circuit and the amplifying circuit; the modified sizing machine tension control system of the sizing machine is controlled by the frequency converter, so that the tension is easy to adjust; the control system is modified to make it semi-automatic and easier to control, Easy to monitor and reduce maintenance.

As shown in FIG. 2, the amplifying circuit includes an amplifier chip, a first resistor, a second resistor, and a third resistor. The output ends of the analog-to-digital conversion circuit are respectively connected to one ends of the first resistor and the second resistor, and the second resistor is further One end is connected to the positive pole of the amplifier chip, the negative pole of the amplifier chip is connected in series with the third resistor, and the other end of the first resistor is grounded, and the voltage output end of the amplifier chip is connected to the programmable controller.

Wherein, the chip type of the programmable controller is EC20-3232BRA, the chip type of the tension converter is EV3300-4T0220G, the chip type of the encoder is ES3-062N6941, and the speed sensor adopts a Hall type speed sensor. The utility model adjusts the tension control system of the sizing machine woven shaft by the frequency converter, so that the tension is easy to adjust; the control system is modified to make it semi-automatic, easier to control, convenient to monitor and reduce maintenance.

Transmission control: (1) Calculate the reduction ratio of the tension motor to the weaving shaft: reduction ratio <= weaving shaft core winding diameter × 3.14 × motor rated speed / maximum vehicle speed (line speed) = (0.116 × 3.14 × 1460) / 60 = 8.87;

(2) Review motor power: motor power >= (maximum tension × motor rated speed × maximum weaving axis radius) / (gear ratio × 9549) = (5000 × 1460 × 0.25) / (8.87 × 9549) = 21.5kw;

(3) Determining the parameters: The calculated reduction ratio should be determined to be about 8.8. The factory was affected by its own conditions during the transformation and decided to increase the reduction ratio to 13.15. Maximum speed = weaving shaft hollow core diameter × 3.14 × motor rated speed / reduction ratio = (0.116 × 3.14 × 1460) / 13.15 = 40.46 The factory confirmed that the maximum speed meets the process requirements. The determined reduction ratio is 13.15. The speed encoder uses a 600-line rotary encoder and is delivered to the factory for installation.

(4) Main inverter parameter setting: According to the actual situation of the slasher, the host inverter of the tension control system selects the td3000-t40110g inverter without speed feedback open-loop vector control mode.

In order to ensure the accuracy of the parameters, Emerson td3300-4t0220g engineering vector inverter parameters are initialized and restored to factory settings. The control mode selects f0.02=1 (closed loop vector control) to check if the encoder is normal. Fb.00=600; press the run key to check if the operation is normal. If the inverter only works around 2hz or starts overcurrent, the display current is very large. It may be the wrong wiring of the encoder, the error of each revolution pulse, the reverse direction of the encoder, etc. If the low speed operation is normal, the high speed overcurrent may be the reason why the coupling of the encoder is loose and high speed slip.

Mechanical transmission ratio: f1.00=13.15. Motor tuning: Set the motor parameters according to the motor nameplate. The motor must be disconnected from the load when the motor is tuned. The tuning process is done automatically. If the motor cannot be turned up for a long time during tuning, the motor parameters are seriously inconsistent or the motor is faulty. Re-enter the motor parameters or replace the motor. Motor direction confirmation: Generally defined as the direction of operation of the motor when fwd is controlled. Inertia tuning: Disconnect the motor from the load.

The utility model adjusts the tension control system of the sizing machine woven shaft by the frequency converter, so that the tension is easy to adjust; the control system is modified to make it semi-automatic, easier to control, convenient to monitor and reduce maintenance.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as the ordinary understanding of one of ordinary skill in the art. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and unless defined as herein, will not be idealized or overly formal. Explanation.

The above embodiments are merely illustrative of the technical idea of the present invention, and the scope of protection of the present invention cannot be limited thereto. Any changes made on the basis of the technical solutions according to the technical idea proposed by the present invention fall into the utility. Within the scope of the new protection. The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, and can be carried out without departing from the scope of the present invention within the scope of knowledge of those skilled in the art. Make a variety of changes.

Claims (5)

A sizing machine tension control system based on PLC and engineering type frequency converter, comprising a slashing machine, characterized in that: a programmable controller, a tension frequency converter, an encoder, a display module and a vehicle speed are arranged on the sizing machine a sensor, a motor speed sensor, and a power module; the tension converter, the encoder, the display module, and the power module are connected to corresponding ports of the programmable controller, and the vehicle speed sensor and the motor speed sensor sequentially pass through an analog-to-digital conversion circuit, The amplifying circuit is connected to the programmable controller; The amplifying circuit includes an amplifier chip, a first resistor, a second resistor, and a third resistor. The output ends of the analog-to-digital conversion circuit are respectively connected to one ends of the first resistor and the second resistor, and the other end of the second resistor is connected to the anode of the amplifier chip. The anode of the amplifier chip is connected in series with the third resistor and grounded to the other end of the first resistor, and the voltage output terminal of the amplifier chip is connected to the programmable controller. A slasher tension control system based on a PLC and an engineering inverter according to claim 1, wherein the programmable controller has a chip type EC20-3232BRA. The slasher tension control system based on the PLC and the engineering type inverter according to claim 1, wherein the chip type of the tension converter is EV3300-4T0220G. The slasher tension control system based on PLC and engineering type inverter according to claim 1, wherein the encoder chip type is ES3-062N6941. The slasher tension control system based on PLC and engineering type inverter according to claim 1, wherein the vehicle speed sensor adopts a Hall type vehicle speed sensor.

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