Automatic compensation control system for processing steel wire rod oxide scale

Abstract

The invention provides an automatic compensation control system for processing steel wire rod oxide scale. The automatic compensation control system comprises a PLC main controller. The PLC main controller is connected with and controls the two frequency converters, the two frequency converters are connected with and control the second steel brush motor and the first steel brush motor respectively, the second steel brush motor and the first steel brush motor drive the left steel brush piece and the right steel brush piece to rotate respectively, and the left steel brush piece and the right steel brush piece are installed in a left-right opposite mode. The system is high in automation degree, low in cost, capable of ensuring efficient and reliable real-time data communication based on an automatic compensation adjustment control technology, low in failure rate, capable of reducing maintenance cost and capable of reducing pollution.

Description

Technical Field

[0001] The invention relates to an automatic compensation control system for processing wire rod oxidized iron scale, belonging to. Background Art

[0002] The surface of the wire rod has a layer of hard and brittle iron oxide scale. The iron oxide scale not only causes the lubricating coating in the next process to be unable to firmly bond with the steel matrix, but also scratches the surface of the mold and the steel wire during drawing, and increases the friction between the two, causing wire breakage in severe cases. Sometimes the iron oxide scale may be pressed into the steel wire matrix, causing various defects. There are mechanical and chemical methods to remove the iron oxide scale. The chemical method has a low level of automation and is susceptible to environmental pollution. The formation of iron oxide scale is mainly due to the adsorption of oxygen atoms (from gases such as O2, H2O, CO2) in the atmosphere of the heating furnace on the surface of the steel and combined with iron atoms to form an iron oxide film. The iron oxide scale must be removed before drawing. The earliest chemical method was to remove the iron oxide scale by chemical reaction of acid with iron oxide scale, but it is costly, not environmentally friendly, and prone to hydrogen embrittlement of materials, which seriously affects product quality. As environmental protection issues are increasingly valued, this method is gradually eliminated. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an automatic compensation control system for processing wire rod oxidized iron scale. The automatic compensation control system for processing wire rod oxidized iron scale has a high degree of automation and low cost. It can be based on automatic compensation adjustment control technology to ensure efficient and reliable real-time data communication, low failure rate, reduced maintenance cost, and reduced pollution.

[0004] The present invention is achieved through the following technical solutions.

[0005] The present invention provides an automatic compensation control system for processing wire rod oxidized iron scale, comprising a PLC main controller; the PLC main controller is connected to control two frequency converters, the two frequency converters are respectively connected to control a second steel brush motor and a first steel brush motor, the second steel brush motor and the first steel brush motor respectively drive a left steel brush piece and a right steel brush piece to rotate, and the left steel brush piece and the right steel brush piece are installed opposite to each other in the left and right directions.

[0006] The second steel brush motor is installed on the left-hand screw through a left-hand nut and a seat, and the first steel brush motor is installed on the right-hand screw through a right-hand nut and a seat. The left-hand screw and the right-hand screw are driven to rotate synchronously by a stepper motor.

[0007] The stepper motor is connected and controlled by a stepper driver.

[0008] The left-hand screw and the right-hand screw are coaxially connected in a forward and reverse buckle form.

[0009] The PLC main controller is also connected to a touch screen for control.

[0010] The second steel brush motor is fixed on the left steel brush box, a left-handed nut and a seat are fixed on the left steel brush box, the left-handed nut and the seat are threadedly mounted on the left-handed screw, the left steel brush piece is rotatably mounted in the left steel brush box, and the second steel brush motor drives the left steel brush piece through a chain.

[0011] The first steel brush motor is fixed on the right steel brush box, a right-handed nut and a seat are fixed on the right steel brush box, the right-handed nut and the seat are threadedly installed on the right-handed screw rod, the right steel brush piece is rotatably installed in the right steel brush box, and the first steel brush motor drives the right steel brush piece through a chain.

[0012] The PLC main controller controls the frequency converter via a PN bus connection.

[0013] The PLC main controller adopts Siemens CPU ST20 model PLC.

[0014] The frequency converter adopts ABB's ACS580 series frequency converter.

[0015] The beneficial effects of the present invention are: high degree of automation, low cost, can be based on automatic compensation adjustment control technology, ensure efficient and reliable real-time data communication, low failure rate, reduce maintenance costs, and reduce pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a connection diagram of at least one embodiment of the present invention;

[0017] Figure 2 yes Figure 1 The second steel brush motor 5 and the first steel brush motor 6 are schematically shown in the side view of the installation structure.

[0018] In the figure: 1-PLC main controller, 2-frequency converter, 3-stepping driver, 4-touch screen, 5-second steel brush motor, 6-first steel brush motor, 7-left steel brush piece, 8-coil, 9-stepping motor, 10-left-hand screw rod, 11-right-hand screw rod, 12-left-hand nut and seat, 13-right-hand nut and seat, 14-left steel brush box, 15-right steel brush box, 16-right steel brush piece. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0020] Example 1

[0021] like Figure 1 , Figure 2An automatic compensation control system for processing wire rod oxidized iron scale shown in the figure includes a PLC main controller 1; the PLC main controller 1 is connected to control two frequency converters 2, and the two frequency converters 2 are respectively connected to control the second steel brush motor 5 and the first steel brush motor 6, the second steel brush motor 5 and the first steel brush motor 6 respectively drive the left steel brush piece 7 and the right steel brush piece 16 to rotate, and the left steel brush piece 7 and the right steel brush piece 16 are installed opposite to each other on the left and right.

[0022] Example 2

[0023] Consistent with Example 1, and further optimized in details, the second steel brush motor 5 is installed on the left-handed screw 10 through a left-handed nut and a seat 12, and the first steel brush motor 6 is installed on the right-handed screw 11 through a right-handed nut and a seat 13. The left-handed screw 10 and the right-handed screw 11 are driven by the stepper motor 9 to rotate synchronously.

[0024] Furthermore, the stepper motor 9 is connected and controlled by the stepper driver 3 .

[0025] Furthermore, the left-hand screw rod 10 and the right-hand screw rod 11 are coaxially connected in a forward and reverse buckle form.

[0026] Furthermore, the second steel brush motor 5 is fixed on the left steel brush box 14, the left-handed nut and the seat 12 are fixed on the left steel brush box 14, the left-handed nut and the seat 12 are threadedly installed on the left-handed screw 10, the left steel brush piece 7 can be rotatably installed in the left steel brush box 14, and the second steel brush motor 5 drives the left steel brush piece 7 through a chain.

[0027] Furthermore, the first steel brush motor 6 is fixed on the right steel brush box 15, the right steel brush box 15 is fixed with a right-handed nut and a seat 13, the right-handed nut and the seat 13 are threadedly mounted on the right-handed screw rod 11, the right steel brush piece 16 is rotatably mounted in the right steel brush box 15, and the first steel brush motor 6 drives the right steel brush piece 16 through a chain.

[0028] Example 3

[0029] Consistent with the first embodiment and further optimized in details, the PLC main controller 1 is also connected to control a touch screen 4 .

[0030] Furthermore, the PLC main controller 1 controls the frequency converter 2 via the PN bus connection.

[0031] Preferably, the PLC main controller 1 adopts a Siemens CPU ST20 model PLC.

[0032] Preferably, the touch screen 4 is a Siemens Smart1000IE touch screen.

[0033] Preferably, the frequency converter 2 adopts ABB's ACS580 series frequency converter.

[0034] Example 4

[0035] Basically consistent with the above embodiment, Siemens CPU ST20 PLC is used as the core of the control system, ABB brand ACS580 series inverter and Siemens Smart1000IE touch screen are used as slave stations, and the master and slave stations are connected through the PN bus. The PLC programmable controller sends control instructions and frequencies to the inverter to drive the 1# and 2# steel brush motors to run respectively, driving the left and right steel brushes to rotate. When the wire rod passes between the left and right steel brushes, the iron oxide on the surface of the wire rod can be removed. After the steel brush piece runs for a period of time, it will be gradually worn away, so that it cannot fully contact with the wire rod. At this time, the load current of the steel brush motor will become smaller. After the PLC system detects that the motor current has become smaller, the system will send a certain number of pulse signals to the stepper driver to drive the stepper motor to drive the bidirectional forward and reverse buckle ball screw to rotate, and the left and right nuts and seats will move relative to each other on the left and right screws. Since the left steel brush box is fixed on the left nut seat and the right steel brush box is fixed on the right nut seat, when the nut seat moves, it will drive the steel brush box to move as a whole. After gradually moving relative to each other, the distance between the left and right steel brush pieces will decrease. At this time, the steel brush piece can fully contact with the wire rod to achieve the effect of removing the oxidized iron scale; at the same time, when the system detects that the load current of the steel brush motor reaches the set value, it means that the moving position has reached the optimal state, and the system stops the stepper motor at this time. The system controls the stepper motor action by continuously detecting the current of the steel brush motor, and automatically compensates and adjusts the distance between the steel brush pieces in real time to achieve the effect of completely removing the oxidized iron scale on the surface of the wire rod. The data transmission technology principle of Ethernet PN communication is adopted, and the data transmission is high-speed and efficient. The system mainly consists of a master station (main controller) and multiple slave stations (frequency converter, stepper driver). The master station is responsible for sending control commands to the entire system and receiving feedback signals and data. The communication and data transmission between the master station and the slave station are carried out through the Profinet communication protocol. The rotation of the steel brush in this system is driven by the main drive motor. The main controller is programmed to send operation instructions and provide a given frequency to the frequency converter, so that the main drive motor drives the load to rotate the steel brush. The frequency converter detects the current generated by the motor during operation and transmits it to the main controller through communication transmission. The main controller receives the real-time current when the motor is running. According to the change of current, the main controller uses the given value of the stepper motor to automatically compensate and adjust the feed position of the steel brush, so that the steel brush can fully achieve the removal effect and meet the quality of wire drawing.

[0036] Therefore, the present invention is based on automatic control technology, utilizes the working principle of stepper motor, converts electric pulse signal into open-loop control technology of angular displacement or linear displacement, and the main drive motor drives the steel brush to rotate. The iron oxide scale on the surface of the wire rod is removed by the rotating friction of the steel brush. When the steel brush is worn to a certain extent, the load current of the main drive motor becomes smaller. When the control system detects that the current becomes smaller, the system sends a pulse command to the stepper motor to automatically compensate and adjust the position of the steel brush so that the working surface of the steel brush is close to the wire rod. A good method for removing iron oxide scale is achieved.

Claims

1. An automatic compensation control system for processing wire rod scale, comprising a PLC main controller (1), characterized in that: The PLC main controller (1) is connected to control two frequency converters (2), and the two frequency converters (2) are respectively connected to control a second steel brush motor (5) and a first steel brush motor (6), and the second steel brush motor (5) and the first steel brush motor (6) respectively drive a left steel brush piece (7) and a right steel brush piece (16) to rotate, and the left steel brush piece (7) and the right steel brush piece (16) are installed opposite to each other on the left and right sides.

2. The automatic compensation control system for processing wire rod scale according to claim 1, characterized in that: The second steel brush motor (5) is mounted on a left-handed screw rod (10) via a left-handed nut and a seat (12), and the first steel brush motor (6) is mounted on a right-handed screw rod (11) via a right-handed nut and a seat (13). The left-handed screw rod (10) and the right-handed screw rod (11) are driven to rotate synchronously by a stepping motor (9).

3. The automatic compensation control system for processing wire rod scale according to claim 2, characterized in that: The stepper motor (9) is connected and controlled by a stepper driver (3).

4. The automatic compensation control system for processing wire rod scale according to claim 1, characterized in that: The left-hand screw (10) and the right-hand screw (11) are coaxially connected in a forward and reverse buckle manner.

5. The automatic compensation control system for processing wire rod scale according to claim 1, characterized in that: The PLC main controller (1) is also connected to a touch screen (4) for control.

6. The automatic compensation control system for processing wire rod scale according to claim 1, characterized in that: The second steel brush motor (5) is fixed on the left steel brush box (14), a left-handed nut and a seat (12) are fixed on the left steel brush box (14), the left-handed nut and the seat (12) are threadedly mounted on the left-handed screw rod (10), the left steel brush piece (7) is rotatably mounted in the left steel brush box (14), and the second steel brush motor (5) drives the left steel brush piece (7) through a chain.

7. The automatic compensation control system for processing wire rod scale according to claim 1, characterized in that: The first steel brush motor (6) is fixed on the right steel brush box (15), a right-handed nut and a seat (13) are fixed on the right steel brush box (15), the right-handed nut and the seat (13) are threadedly mounted on the right-handed screw rod (11), the right steel brush piece (16) is rotatably mounted in the right steel brush box (15), and the first steel brush motor (6) drives the right steel brush piece (16) through a chain.

8. The automatic compensation control system for processing wire rod scale according to claim 1, characterized in that: The PLC main controller (1) controls the frequency converter (2) via a PN bus connection.

9. The automatic compensation control system for processing wire rod scale according to claim 1, characterized in that: The PLC main controller (1) adopts a Siemens CPU ST20 model PLC.

10. The automatic compensation control system for processing wire rod scale according to claim 1, characterized in that: The frequency converter (2) adopts ABB's ACS580 series frequency converter.

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