Tension control system of wire drawing machine

Abstract

The utility model relates to the technical field of wire drawing machines, in particular to a tension control system of a wire drawing machine, which comprises a PLC (Programmable Logic Controller) main control board and a touch screen which are electrically connected, the PLC main control board is electrically connected with a frequency converter, the frequency converter is in communication connection with a stretcher and a winding machine, the stretcher is in communication connection with a stretcher mainboard, and the winding machine is in communication connection with a winding machine mainboard; an output shaft of the stretching machine is connected with a stretching wheel, an output shaft of the winding machine is connected with a winding wheel, the other end of the winding wheel is connected with a pay-off wheel through a metal wire, a tension swing rod is arranged between the winding wheel and the stretching wheel, and the tension swing rod is in communication connection with a winding machine mainboard. According to the utility model, the tension oscillating bar is arranged between the wire outlet end and the wire take-up end of the wire drawing machine and is used for detecting the tension of an output metal wire, feeding back and inputting the tension as a wire drawing and take-up tension signal into the take-up frequency converter and adjusting the output frequency of the frequency converter, so that the rotating speed of the take-up motor is controlled to be synchronous relative to the linear speed of the wire drawing machine; and the tension of the wire rod is kept constant, and the wire drawing stability and the wire drawing efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wire drawing machine control system, in particular to a wire drawing machine tension control system belongs to wire drawing machine technical field. BACKGROUND

[0002] Wire drawing machine is a kind of mechanical equipment widely used in metal processing industry, mainly used to draw various metal wires to change its diameter, shape or physical properties, wire drawing machine has extensive effect in metal processing industry, construction industry and energy industry.

[0003] With the widespread use of copper wire, steel wire in various trades, the demand of wire thickness specification is more and more, which needs a lot of equipment to thin the thick wire, the existing metal wire drawing machine is often guided and limited to different sizes of metal plate during feeding, and the stability of wire drawing operation and the efficiency of wire drawing are influenced due to the different tension of metal wire in the process of stretching.

[0004] Therefore, it is urgent to improve the tension control system of wire drawing machine to solve the above problems. INVENTION CONTENTS

[0005] The utility model aims at providing a wire drawing machine tension control system, tension swing lever is installed between wire drawing machine wire outlet end and take-up end, which is used to detect the tension of output metal wire, as wire drawing take-up tension signal feedback input winding frequency converter, adjust the output frequency of frequency converter, so as to control the synchronous speed of winding motor relative to the wire speed of stretching machine, at the same time, the stability of wire drawing and the efficiency of wire drawing are improved.

[0006] In order to achieve the above purpose, the main technical scheme of the utility model comprises:

[0007] A wire drawing machine tension control system, comprising PLC main control board and touch screen connected electrically, the PLC main control board is electrically connected with frequency converter, the frequency converter is communicated with stretching machine and winding machine, the stretching machine is communicated with stretching machine mainboard, the winding machine is communicated with winding machine mainboard on the winding machine;

[0008] The output shaft of the stretching machine is connected with a plurality of stretching wheels, the output shaft of the winding machine is connected with winding wheel, the other end of the winding wheel is connected with pay-off wheel through metal wire, tension swing lever is arranged between the winding wheel and the stretching wheel, the tension swing lever is communicated with the winding machine mainboard.

[0009] Preferably, the touch screen is communicated with the PLC main control board through 485 communication protocol;

[0010] The PLC master control board is connected with the frequency converter through a CAN bus protocol.

[0011] Preferably, the stretch machine master board is provided with a start switch S1, an electric operation switch S2, a fault reset switch S3 and a brake emergency stop switch S4 in parallel.

[0012] Preferably, the stretch machine master board is provided with a start switch S1, an electric operation switch S2, a fault reset switch S3 and a brake emergency stop switch S4 in parallel.

[0013] Preferably, the stretch machine master board is provided with a start switch S1, an electric operation switch S2, a fault reset switch S3 and a brake emergency stop switch S4 in parallel.

[0014] Preferably, the stretch machine master board is provided with a start switch S1, an electric operation switch S2, a fault reset switch S3 and a brake emergency stop switch S4 in parallel.

[0015] Preferably, the stretch machine master board is provided with a start switch S1, an electric operation switch S2, a fault reset switch S3 and a brake emergency stop switch S4 in parallel.

[0016] Preferably, the stretch machine master board is provided with a start switch S1, an electric operation switch S2, a fault reset switch S3 and a brake emergency stop switch S4 in parallel.

[0017] The utility model at least has the following beneficial effects:

[0018] The tension swing rod is installed between the wire outlet end and the wire collecting end of the wire drawing machine, is used for detecting the tension of the output metal wire, is taken as the wire drawing and wire collecting tension signal feedback input of the winding frequency converter, that is, the winding frequency converter analog input AI1 connects the swing rod position feedback signal 0-10V, the position point of the expected swing rod stable operation is set as the PID given value, the feedback signal and the given value are compared all the time in the system operation process, the PID controller is automatically operated according to the difference value, then is superimposed with the current synchronous speed of winding, adjusts the output frequency of the frequency converter, thereby controls the winding motor speed to reach the synchronization with the wire speed of the stretch machine, simultaneously, the wire rod tension also keeps constant. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application.

[0020] Figure 1 It is the system mechanism drawing of the utility model;

[0021] Figure 2 It is the electrical principle drawing of the utility model;

[0022] Figure 3 It is the stretch machine structure schematic view of the utility model.

[0023] In the diagram, 1. PLC main control board; 2. Touch screen; 3. Frequency converter; 4. Stretching machine; 401. Stretching machine main board; 402. Stretching wheel; 5. Winding machine; 501. Winding machine main board; 502. Winding wheel; 6. Pay-off wheel; 7. Tension swing arm. Detailed Implementation

[0024] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0025] like Figures 1-3 As shown, the tension control system for the wire drawing machine provided in this embodiment includes a PLC main control board 1 and a touch screen 2 electrically connected. A frequency converter 3 is electrically connected to the PLC main control board 1. A stretching machine 4 and a winding machine 5 are communicatively connected to the frequency converter 3. The stretching machine 4 is communicatively connected to a stretching machine main board 401, and the winding machine 5 is communicatively connected to a winding machine main board 501. Several stretching rollers 402 are connected to the output shaft of the stretching machine 4, and a winding roller 502 is connected to the output shaft of the winding machine 5. The other end of the winding roller 502 is connected via a metal... The wire is connected to a wire feeding wheel 6, and a tension lever 7 is set between the winding wheel 502 and the stretching wheel 402. The tension lever 7 establishes a communication connection with the main board 501 of the winding machine. Different types of wire drawing machines can be selected for different requirements, different precision specifications, and different metal materials. Although the wire drawing process is different, its working process is basically the same. It is generally divided into three major steps: wire feeding, stretching, and wire taking. The stretching motor drives the stretching wheel to rotate. The multi-stage stretching wheel is linked by a belt to realize metal stretching and wire feeding. The winding motor realizes winding.

[0026] A tension lever is installed between the wire drawing machine's output end and take-up end to detect the tension of the output metal wire. This tension signal is used as feedback input to the winding frequency converter. Specifically, the winding frequency converter's analog input AI1 is connected to the lever's position feedback signal (0-10V). The desired stable operating position of the lever is set as the PID setpoint. During system operation, the feedback signal is constantly compared with the setpoint. The PID controller automatically calculates the difference and then superimposes it with the current synchronous speed of the winding to adjust the frequency converter's output frequency. This controls the winding motor speed to synchronize with the wire drawing machine's linear speed, while also maintaining a constant wire tension.

[0027] Furthermore, such as Figure 1 As shown, the touch screen 2 establishes a communication connection with the PLC main control board 1 through the 485 communication protocol, and the PLC main control board 1 establishes a communication connection with the frequency converter 3 through the CAN bus protocol. The 485 communication protocol improves the reliability and transmission distance of serial communication. It uses a differential signal transmission method, which transmits positive and negative signals through a pair of signal lines to suppress common-mode interference and improve communication quality.

[0028] Further, as shown in Figure 1 The stretch machine main board 401 is provided with a start running switch S1, an electric running switch S2, a fault reset switch S3 and a clutch emergency stop switch S4 in parallel, and the winding machine main board 501 is provided with a fault reset switch S5 and a clutch emergency stop switch S6 in parallel, and the corresponding collection board controls the motor clutch solenoid to be powered, and the solenoid is de-energized when stopped, which improves stability and efficiency, and also improves flexibility and range of use through manual operation.

[0029] As shown in Figure 1 The stretch machine main board 401 is provided with a start running switch S1, an electric running switch S2, a fault reset switch S3 and a clutch emergency stop switch S4 in parallel, and the winding machine main board 501 is provided with a fault reset switch S5 and a clutch emergency stop switch S6 in parallel, and the corresponding collection board controls the motor clutch solenoid to be powered, and the solenoid is de-energized when stopped, which improves stability and efficiency, and also improves flexibility and range of use through manual operation.

[0030] As shown in Figure 1 The tension swing rod 7 is electrically connected to the +10V pin and the ATI pin of the winding machine main board 501, and the brake resistance is electrically connected to the PB pin and the P pin of the winding machine main board 501, and a plurality of line dividing wheels and molds are arranged between the pay-off wheel 6 and the winding wheel 502, which improves the stability during the drawing process, is simple in structure and ensures that the tension during the drawing process is constant.

[0031] As shown in Figures 1-3 The principle of the wire drawing machine tension control system provided by the embodiment is as follows: the PLC main control board 1 is electrically connected with the frequency converter 3, the frequency converter 3 is in communication connection with the stretching machine 4 and the winding machine 5, the stretching machine 4 is in communication connection with the stretching machine main board 401, the winding machine 5 is in communication connection with the winding machine main board 501, the output shaft of the stretching machine 4 is connected with a plurality of stretching wheels 402, the output shaft of the winding machine 5 is connected with the winding wheel 502, the other end of the winding wheel 502 is connected with the pay-off wheel 6 through a metal wire, the tension swing rod 7 is arranged between the winding wheel 502 and the stretching wheel 402, and the tension swing rod 7 is in communication connection with the winding machine main board 501. Different requirements, different precision specifications and different metal materials can select different forms of wire drawing machines. Although the wire drawing processes are different, the working processes are basically the same, which generally includes three steps of paying off, stretching and winding. The stretching motor drives the pay-off wheel to rotate, the multi-stage pay-off wheel is linked through a belt, the metal stretching and paying off are realized, and the winding motor realizes winding.

[0032] The tension swing lever is installed between the wire drawing machine wire outlet end and the wire collecting end, and is used to detect the tension of the output wire, as a wire collecting variable frequency device tension signal feedback input, that is, the swing lever position feedback signal 0-10V of the wire collecting variable frequency device analog input AI1 is connected, the position point of the expected swing lever stable operation is set as the PID given value, the feedback signal and the given value are compared during the system operation, the PID controller automatically calculates according to the difference, and then is superimposed with the current synchronous speed of the winding, so as to adjust the output frequency of the variable frequency device, so as to control the synchronous speed of the winding motor speed relative to the wire drawing machine wire speed, and at the same time, the wire tension is kept constant.

[0033] As used in the specification and claims, certain terminology is used to refer to certain components. Those of ordinary skill in the art will appreciate that different manufacturers can refer to the same component by different names. The specification and claims do not distinguish components on the basis of different names but rather on the basis of functional distinctions. As used throughout this specification and in the claims, "comprising" is intended to mean "including but not limited to," such that the listed items are the only items not excluded. "Consisting essentially of" when used throughout this specification and in the claims, excludes items in addition to the recited ones that materially alter the basic and novel characteristics of the claimed application. "Consisting of" is intended to mean "including and limited to," such that the listed items are the only items not excluded.

[0034] It is to be understood that the terms "including", "comprising", "consisting of" or variations thereof merely delineate the introduction of a list of elements and do not exclude the presence of other elements that are not expressly listed. The term "consisting essentially of" does not exclude the presence of other elements or steps, so long as the presence of those other elements or steps do not materially alter the basic and novel characteristics of the claimed application.

[0035] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, the present application is not limited to the forms disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified by the above teachings or related art or knowledge within the scope of the present application. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall be within the scope of protection of the appended claims of the present application.

Claims

1. A wire drawing machine tension control system comprising a PLC master control board (1) and a touch screen (2) connected electrically, characterized in that, The PLC main control board (1) is electrically connected with a frequency converter (3), the frequency converter (3) is in communication connection with a stretching machine (4) and a winding machine (5), the stretching machine (4) is in communication connection with a stretching machine mainboard (401), and the winding machine (5) is in communication connection with a winding machine mainboard (501); The output shaft of the stretching machine (4) is connected with a plurality of stretching wheels (402), the output shaft of the winding machine (5) is connected with a winding wheel (502), the other end of the winding wheel (502) is connected with a pay-off wheel (6) through a metal wire, and a tension swing lever (7) is arranged between the winding wheel (502) and the stretching wheel (402), and the tension swing lever (7) is in communication connection with the winding machine mainboard (501).

2. A tension control system for a wire drawing machine as claimed in claim 1, characterized in that: The touch screen (2) is in communication connection with the PLC main control board (1) through a 485 communication protocol; The PLC main control board (1) is in communication connection with the frequency converter (3) through a CAN bus protocol.

3. A tension control system for a wire drawing machine as claimed in claim 1, wherein: The stretching machine mainboard (401) is provided with a start running switch S1, an electric running switch S2, a fault reset switch S3 and a brake emergency stop switch S4 in parallel.

4. A tension control system for a wire drawing machine as claimed in claim 1, wherein: The pin +10V and ATI of the stretching machine mainboard (401) are electrically connected with a potentiometer.

5. A tension control system for a wire drawing machine as claimed in claim 1, wherein: The winding machine mainboard (501) is provided with a fault reset switch S5 and a brake emergency stop switch S6 in parallel.

6. A tension control system for a wire drawing machine as defined in claim 1, wherein: The tension swing lever (7) is electrically connected with the +10V pin and the ATI pin of the winding machine mainboard (501).

7. A tension control system for a wire drawing machine as claimed in claim 1, wherein: The pin PB and the pin P of the winding machine mainboard (501) are electrically connected with a brake resistor.

8. A tension control system for a wire drawing machine as defined in claim 1, wherein: A plurality of line dividing wheels and a mold are arranged between the pay-off wheel (6) and the winding wheel (502).

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