Crescent shear control system and cold rolling production line

Abstract

The invention discloses a crescent shear control system and a cold rolling production line, and belongs to the technical field of metallurgy. The control system comprises an encoder and a crescent shear trolley, wherein the encoder is arranged on the crescent shear trolley; the encoder is used for detecting the moving distance of the crescent shear trolley; and the crescent shear trolley is used for shearing a welding seam of the strip steel. According to the control system, the moving distance of the crescent shear trolley can be detected through the encoder, and when the widths of strip steel needing to be sheared are different, the crescent shear trolley can be controlled to move by different distances according to different detection signals of the encoder, so that shearing of different shearing depths is achieved, and the shearing quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, and in particular to a control system of a crescent shear and a cold rolling production line. Background Art

[0002] Crescent shears are a crescent-shaped shearing tool. They are an indispensable shearing tool in the production and processing of cold-rolled strip steel. They are usually used to shear the weld between two cold-rolled strips that exceeds a certain width to ensure the welding quality and reduce the weld breakage rate in the rolling mill.

[0003] At present, photoelectric switches are used to detect the position of the crescent shear trolley. When the first photoelectric switch receives the light signal reflected by the strip, it means that the crescent shear trolley has moved to the vicinity of the weld. When the second photoelectric switch receives the light signal reflected by the strip, it means that the crescent shear trolley has moved to the operating position. At this time, the crescent shear trolley is controlled to stop moving and the crescent shear is controlled to shear, thereby achieving shearing of the weld.

[0004] However, due to the different widths of the excess strip at the weld, the width of the strip that needs to be cut is different. The movement of the crescent shear trolley is controlled according to the light signal of the photoelectric switch, resulting in the same cutting depth each time, that is, the width of the strip cut each time is the same, resulting in large differences in the final cutting quality. Summary of the invention

[0005] In view of the above problems, the present invention is proposed to provide a control system of a crescent shear and a cold rolling production line that solves the above problems. The moving distance of the crescent shear trolley can be detected by an encoder. When the width of the strip to be cut is different, the crescent shear trolley can be controlled to move different distances according to different detection signals of the encoder, thereby achieving shearing at different shearing depths and improving the shearing quality.

[0006] In a first aspect, the present invention provides a control system for a crescent shears, the control system comprising an encoder and a crescent shears trolley, the encoder being arranged on the crescent shears trolley;

[0007] The encoder is used to detect the distance moved by the crescent shears trolley;

[0008] The crescent shear trolley is used to shear the weld of the strip steel.

[0009] Optionally, the control system further includes a controller, and the controller is used to:

[0010] Receiving the moving distance of the crescent shears carriage sent by the encoder;

[0011] If the moving distance is the preset target distance, the crescent shears trolley is controlled to stop moving and the shearing operation is performed.

[0012] Optionally, the control system further comprises a photoelectric switch arranged on the crescent shear trolley, wherein the photoelectric switch is used to send a deceleration signal to the controller when detecting that the crescent shear trolley moves to a preset deceleration position.

[0013] Optionally, the controller is further used for:

[0014] If the deceleration signal sent by the photoelectric switch is received, the crescent shear trolley is controlled to decelerate.

[0015] Optionally, the control system further comprises a length sensor for detecting the length of the weld of the steel strip and sending the length of the weld to the controller.

[0016] Optionally, the controller is further used for:

[0017] Acquiring the width of the steel strip and receiving the length of the weld sent by the length sensor;

[0018] The target distance is determined according to the width of the steel strip and the length of the weld.

[0019] Optionally, the crescent shear trolley includes a trolley body, a crescent shear mechanism and a hydraulic motor driver;

[0020] The crescent shear mechanism is arranged on the trolley body;

[0021] The hydraulic motor driver is used to drive the trolley body to move;

[0022] The crescent shear mechanism is used to shear the weld of the strip steel.

[0023] Optionally, the crescent shears mechanism includes a crescent shear and a shear blade hydraulic cylinder, and the shear blade hydraulic cylinder is used to drive the crescent shears to perform a shearing operation.

[0024] Optionally, the photoelectric switch includes a plurality of photoelectric switches.

[0025] In a second aspect, the present invention provides a cold rolling production line, which includes the control system of the crescent shears described in the first aspect.

[0026] The technical solution provided in the embodiments of the present invention has at least the following technical effects or advantages:

[0027] The embodiment of the present invention provides a control system of a crescent shear and a cold rolling production line. The control system includes an encoder and a crescent shear trolley. The encoder is arranged on the crescent shear trolley. When the crescent shear trolley moves, the encoder can detect the distance moved by the crescent shear trolley in real time. After the crescent shear trolley moves to a suitable distance, the weld of the strip steel is sheared. The control system can detect the distance moved by the crescent shear trolley through the encoder. When the width of the strip steel to be sheared is different, the crescent shear trolley can be controlled to move different distances according to different detection signals of the encoder, thereby achieving shearing of different shearing depths and improving shearing quality.

[0028] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0030] Figure 1 It is a side structural schematic diagram of a control system of a crescent scissors provided by an embodiment of the present invention;

[0031] Figure 2 The diagram is a top view of the structure of a control system of a crescent scissors provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0033] Figure 1 is a side view structural diagram of a control system of a crescent scissors provided by an embodiment of the present invention, such as Figure 1 As shown, the control system includes an encoder 1 and a crescent shear trolley 2, wherein the encoder 1 is arranged on the crescent shear trolley 2; the encoder 1 is used to detect the moving distance of the crescent shear trolley 2; the crescent shear trolley 2 is used to shear the weld of the strip steel.

[0034] In this embodiment, the welding machine is an important equipment of the cold rolling production line, which is used for welding the tail and head of the production line strip, so as to realize the continuous production of the production line. The welding machine is a device integrating mechanical, electrical and automation, which has the characteristics of high maintenance difficulty and high precision. Its importance is like the "throat" of the human body. In order to ensure the welding quality and reduce the breakage rate of the weld in the rolling mill, a crescent shear is required to shear the strip material at the weld. The accuracy of the positioning of the crescent shear trolley 2 is directly related to the welding quality and efficiency.

[0035] Among them, the encoder 1 is a device that compiles and converts signals or data into signal forms that can be used for communication, transmission and storage. It can convert angular displacement or linear displacement into electrical signals. The former is called a code disk and the latter is called a code ruler. The encoder 1 can be divided into contact and non-contact types according to the readout method, and can be divided into incremental and absolute types according to the working principle.

[0036] In this embodiment, the encoder 1 can be an incremental encoder, which converts the displacement into a periodic electrical signal, and then converts the electrical signal into a counting pulse, and the number of pulses is used to represent the size of the displacement. In addition, the encoder 1 is small in size, light in weight, has a wide variety of products, is fully functional, has a high frequency response, has a strong resolution, has a small torque, consumes little energy, has stable performance, is sensitive and reliable, and has a long service life. The volume of the control system of the crescent shears can be reduced and the sensitivity can be improved.

[0037] The encoder 1 may include multiple encoders, which are respectively installed on the operating side and the driving side of the crescent shear trolley 2.

[0038] In this embodiment, when the crescent shear trolley 2 moves, the encoder 1 will detect the moving distance of the crescent shear trolley 2 in real time. The current position of the crescent shear trolley 2 can be determined according to the position of the crescent shear trolley 2 before moving and the moving distance. When the crescent shear trolley 2 moves to the set position, it will shear the strip steel 3.

[0039] Optionally, the control system further includes a controller, and the controller is used to:

[0040] Receive the moving distance of the crescent shear trolley 2 sent by the encoder 1; if the moving distance is the preset target distance, control the crescent shear trolley 2 to stop moving and perform the shearing operation.

[0041] The controller may be a PLC controller (Programmable Logic Controller).

[0042] In this embodiment, the encoder 1 will feed back the detected moving distance of the crescent shear trolley 2 to the controller through the Profibus-DP bus, and the controller will accept the moving distance. If the moving distance is the preset target distance, it means that the current position of the crescent shear trolley 2 meets the requirements. At this time, the shearing depth can just cut off the excess strip steel 3 at the weld.

[0043] In this embodiment, the control system further includes an HMI (Human Machine Interface), and the user can set the size of the target distance on the HMI.

[0044] Optionally, the control system further comprises a length sensor for detecting the length of the weld of the steel strip 3 and sending the length of the weld to the controller.

[0045] In this embodiment, since the length of the weld produced each time the strip steel 3 is welded will be different, resulting in a different width of the strip steel 3 that needs to be cut each time, the length of the weld can be detected by a length sensor, so that a more appropriate target distance can be set according to the length of the weld.

[0046] Optionally, the controller is further configured to:

[0047] The width of the steel strip 3 and the length of the weld sent by the receiving length sensor are obtained; and the target distance is determined according to the width of the steel strip 3 and the length of the weld.

[0048] In this embodiment, the target distance can also be automatically generated without manual input, so that the cutting process is more automated and the cutting accuracy is further improved.

[0049] Specifically, the width of the steel strip 3 to be sheared is related to the width of the steel strip 3 and the length of the weld, so the width of the steel strip 3 can be obtained from the control system of the rolling production line, and then combined with the length of the weld detected by the length sensor to determine the target distance, so that the target distance can be different according to the different widths of the steel strip 3 and the different lengths of the weld, thereby controlling the shearing depth more reasonably and improving the shearing quality.

[0050] Figure 2 is a schematic diagram of a top view of a control system of a crescent scissors provided by an embodiment of the present invention, such as Figure 2 The control system shown also includes a photoelectric switch 4, which is arranged on the crescent shear trolley 2. The photoelectric switch 4 is used to send a deceleration signal to the controller when it detects that the crescent shear trolley 2 moves to a preset deceleration position.

[0051] In this embodiment, the photoelectric switch 4 can be arranged at the head of the crescent shear trolley 2, so that the light signal reflected by the strip steel 3 can be better received. When the photoelectric switch 4 receives the light signal reflected by the strip steel 3, it indicates that the crescent shear trolley 2 has moved to the deceleration position, and the crescent shear trolley 2 can be further positioned by the photoelectric switch 4. At the same time, when the crescent shear trolley 2 moves to the deceleration position, the photoelectric switch 4 can also send a deceleration signal to the controller, so that the controller can perform corresponding control according to the deceleration signal.

[0052] Optionally, the controller is further configured to:

[0053] If a deceleration signal is received from the photoelectric switch, the crescent shear trolley 2 is controlled to decelerate.

[0054] In the present embodiment, in order to more accurately control the moving distance of the crescent shears trolley 2 to be the target distance and make the crescent shears trolley 2 stop at the target position, a deceleration position can be set in advance. When the crescent shears trolley 2 moves to the deceleration position, the controller will control the crescent shears trolley 2 to decelerate. After the speed of the crescent shears trolley 2 is reduced, when the crescent shears trolley 2 is controlled to stop moving, the crescent shears trolley 2 can stop at the target position more accurately to prevent inertia from causing the actual parking position of the crescent shears trolley 2 to exceed the target position.

[0055] Optionally, the photoelectric switch 4 includes multiple ones.

[0056] In this embodiment, when there are multiple photoelectric switches 4, they can be installed on the operating side and the driving side of the crescent shear trolley 2. When the controller receives the deceleration signal sent by all the photoelectric switches 4, it can control the crescent shear trolley 2 to decelerate, making the control more accurate and avoiding misjudgment.

[0057] Optionally, the crescent shear trolley 2 includes a trolley body, a crescent shear mechanism and a hydraulic motor driver 5;

[0058] The crescent shear mechanism is arranged on the trolley body; the hydraulic motor driver 5 is used to drive the trolley body to move; the crescent shear mechanism is used to shear the weld of the strip steel 3.

[0059] In this embodiment, the trolley body is equivalent to a base, which can support and stabilize the crescent shear mechanism. The stroke of the hydraulic motor driver 5 can be controlled by a controller to control the moving distance of the trolley body.

[0060] like Figure 2 As shown, the trolley body includes wheels 6 , and the control system also includes tracks 7 , on which the wheels 6 can run.

[0061] like Figure 2 As shown, the crescent shear mechanism includes a crescent shear 8 and a shear blade hydraulic cylinder, and the shear blade hydraulic cylinder is used to drive the crescent shear 8 to perform a shearing operation.

[0062] In this embodiment, the crescent shear 8 is driven by the shear blade hydraulic cylinder to move vertically downward to achieve shearing of the strip steel 3, and the sheared crescent waste is slid into the waste box next to the transmission side equipment through the movable chute.

[0063] The control system of the crescent shear in this embodiment includes an encoder 1, a photoelectric switch 4, a PLC controller, a hydraulic motor driver 5, a shear blade hydraulic cylinder, a crescent shear 8, and a trolley body. The signal lines of the encoder 1 and the photoelectric switch 4 in this control system are connected to an analog input module, and this analog input module is connected in series to the PLC device. The PLC controller controls the forward and reverse rotation of the hydraulic motor according to the preset target distance, and drives the trolley body forward and backward. After the crescent shear 8 reaches the specified position, the shear blade hydraulic cylinder drives the upper shear blade to move vertically downward to achieve shearing, and the sheared crescent waste is slid into the waste box next to the transmission side equipment through the movable chute. The PLC controller of this control system sends a command to the crescent shear trolley 2, and the crescent shear trolley 2 starts to move. When the photoelectric switch 4 detects the strip steel 3, the crescent shear trolley 2 starts to decelerate. When the target distance is moved, the crescent shear trolley 2 stops moving, and the shearing sequence starts to achieve precise shearing.

[0064] Based on the same inventive concept, an embodiment of the present invention further provides a cold rolling production line, which includes a control system of the above-mentioned crescent shear.

[0065] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0066] The embodiment of the present invention provides a control system of a crescent shear and a cold rolling production line. The control system includes an encoder and a crescent shear trolley. The encoder is arranged on the crescent shear trolley. When the crescent shear trolley moves, the encoder can detect the distance moved by the crescent shear trolley in real time. After the crescent shear trolley moves to a suitable distance, the weld of the strip steel is sheared. The control system can detect the distance moved by the crescent shear trolley through the encoder. When the width of the strip steel to be sheared is different, the crescent shear trolley can be controlled to move different distances according to different detection signals of the encoder, thereby achieving shearing of different shearing depths and improving shearing quality.

[0067] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0068] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those explicitly recited in each claim. More specifically, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present invention.

[0069] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "one" or "an" preceding a component does not exclude the presence of a plurality of such components. The present invention may be implemented by means of hardware comprising a number of different components and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc., does not indicate any order. These words may be interpreted as names.

Claims

1. A control system for a crescent scissors, characterized in that: The control system includes an encoder and a crescent shear trolley, and the encoder is arranged on the crescent shear trolley; The encoder is used to detect the distance moved by the crescent shears trolley; The crescent shear trolley is used to shear the weld of the strip steel.

2. The control system of the crescent scissors according to claim 1, characterized in that: The control system further comprises a controller, wherein the controller is configured to: Receiving the moving distance of the crescent shears carriage sent by the encoder; If the moving distance is the preset target distance, the crescent shears trolley is controlled to stop moving and the shearing operation is performed.

3. The control system of the crescent scissors according to claim 2, characterized in that: The control system also includes a photoelectric switch arranged on the crescent shears trolley, and the photoelectric switch is used to send a deceleration signal to the controller when it detects that the crescent shears trolley moves to a preset deceleration position.

4. The control system of the crescent scissors according to claim 3, characterized in that: The controller is also used for: If the deceleration signal sent by the photoelectric switch is received, the crescent shear trolley is controlled to decelerate.

5. The control system of the crescent scissors according to claim 2, characterized in that: The control system further comprises a length sensor for detecting the length of the weld of the steel strip and sending the length of the weld to the controller.

6. The control system of the crescent scissors according to claim 5, characterized in that: The controller is also used for: Acquiring the width of the steel strip and receiving the length of the weld sent by the length sensor; The target distance is determined according to the width of the steel strip and the length of the weld.

7. The control system of the crescent scissors according to claim 1, characterized in that: The crescent shear trolley comprises a trolley body, a crescent shear mechanism and a hydraulic motor driver; The crescent shear mechanism is arranged on the trolley body; The hydraulic motor driver is used to drive the trolley body to move; The crescent shear mechanism is used to shear the weld of the strip steel.

8. The control system of the crescent scissors according to claim 7, characterized in that: The crescent shear mechanism comprises a crescent shear and a shear blade hydraulic cylinder, and the shear blade hydraulic cylinder is used to drive the crescent shear to perform a shearing operation.

9. The control system of the crescent scissors according to claim 3, characterized in that: The photoelectric switch includes a plurality of photoelectric switches.

10. A cold rolling production line, characterized in that: The cold rolling production line includes the control system of the crescent shears described in any one of claims 1-9.

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