An origin seeking device and method for a continuous casting mold vibration system

Abstract

An origin seeking device and method for a continuous casting mold vibration system, belonging to the technical field of continuous casting mold vibration control. The origin seeking device includes a mold, a vibration table frame, an electric cylinder, and a positioning base. A origin seeking detection component is arranged on the positioning base. The origin seeking detection component includes an adjustment bracket, proximity switch I, proximity switch II, and proximity switch III. The distance between proximity switch I and proximity switch III is equal to the maximum stroke of the electric cylinder's action trajectory. The height where proximity switch II is located is flush with the height of the movable end of the electric cylinder when the vibration table frame returns to the horizontal position. The beneficial effects of the present invention are that the origin seeking device has a simple structure, is convenient for installation and adjustment, has strong versatility, a long service life, realizes the automatic control of origin seeking, improves the efficiency and accuracy of origin seeking operations, reduces the labor intensity of workers, improves the rhythm of continuous casting pouring, reduces the mechanical failures of the electric cylinder, reduces the breakout accident, and improves the quality of the cast slab.

Description

Technical Field

[0001] The present invention relates to the technical field of continuous casting mold vibration control, and particularly to a device and method for finding the origin of a continuous casting mold vibration system. Background Art

[0002] The continuous casting vibration system uses a computer to calculate and generate a waveform curve (sine or non-sine curve) of the mold vibration, causing the mold to make corresponding movements, and precisely controlling the up and down vibration of the mold in combination with the casting speed, so that the vibration waveform maintains precise frequency, amplitude, negative slippage time, positive slippage time, waveform skew rate, etc., and finally obtains a mold vibration trajectory that meets the process requirements. After the vibration ends and returns to the original position, the vibration system often cannot return to the mechanical origin due to various reasons. For the mold to complete these complex and precise vibration trajectories, the vibration system must start vibrating at the mechanical origin position, and the operation of finding the origin must be performed before each vibration. Otherwise, it will affect the quality of the cast slab, even cause a breakout accident or even cause a major equipment accident.

[0003] The traditional operation of finding the origin is to manually press the "find origin" button on the operation box, and the vibration system finds the origin according to the lifting step distance. However, in this operation of finding the origin, since the operator does not know whether the vibration system has gone through a vibration cycle, the adjustment times often exceed the set value without reaching the mechanical origin, resulting in the failure of the operation of finding the origin; at this time, only manual lifting control can be used to find the origin. Through the intercom, one person observes the state of the vibration table frame, and the other person operates the operation box. It can be successfully debugged only after the vibration table frame is in a horizontal position and the vibration table frame has gone through a vibration cycle. Therefore, it takes many times to succeed. This traditional operation of finding the origin is time-consuming and laborious. In a harsh environment, the labor intensity of workers is high, and it seriously affects the casting rhythm of continuous casting billets, and even directly affects the quality of continuous casting billets, bringing no small losses to the enterprise.

[0004] The continuous casting mold vibration control system must quickly find the mechanical starting origin before starting vibration to ensure the complex and precise vibration of the mold, ensure the production rhythm and the quality of the cast slab. This is a difficult problem encountered in the automatic control technology of continuous casting molds. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a device and method for finding the origin of a continuous casting mold vibration system. According to the vibration stroke of the continuous casting vibration system, two proximity switches are added around the electric cylinder, and a proximity switch for finding the origin is set between the two proximity switches according to the position of the movable end of the electric cylinder when the vibration table frame is horizontal after returning. The upper and lower proximity switches can detect the vibration direction and the number of cycles of the electric cylinder, and the middle proximity switch can be used to detect the position of the vibration table frame when it is horizontal within a vibration cycle of the electric cylinder, that is, the mechanical origin position, so that the reliability, accuracy and efficiency of finding the origin are high.

[0006] To achieve the above object, the technical solution adopted by the present invention to solve its technical problems is as follows: The origin seeking device of the continuous casting mold vibration system includes a mold, a vibration table frame, an electric cylinder, and a positioning base. The upper end of the vibration table frame is connected to the mold, the lower end of the vibration table frame is connected to the positioning base through the electric cylinder, and a origin seeking detection component is arranged on the positioning base. The origin seeking detection component includes an adjustment bracket and proximity switches I, II, and III arranged in sequence from top to bottom along its height direction. The adjustment bracket is connected to the positioning base. The distance between proximity switch I and proximity switch III is equal to the maximum stroke of the action track of the electric cylinder. The height where proximity switch II is located is flush with the height of the movable end of the electric cylinder when the vibration table frame returns to the horizontal position. The distances between proximity switches I, II, and III and the outer wall of the movable end of the electric cylinder are respectively less than or equal to the rated action distances of the corresponding proximity switches.

[0007] Further, the device further includes a PC and a PLC control unit connected thereto through an industrial Ethernet. Proximity switches I, II, and III are connected to the signal input end of the PLC control unit, and the signal output end of the PLC control unit is electrically connected to the electric cylinder.

[0008] Further, InTouch software is installed in the PC, and the control interface of the InTouch software communicates with the PLC control unit through an industrial Ethernet.

[0009] Further, two or more sets of the origin seeking detection components are provided, and the proximity switches I on the multiple sets of origin seeking detection components are connected in parallel with each other, the proximity switches II on the multiple sets of origin seeking detection components are connected in parallel with each other, and the proximity switches III on the multiple sets of origin seeking detection components are connected in parallel with each other; the multiple sets of the origin seeking detection components are arranged around the electric cylinder.

[0010] Further, the adjustment bracket includes a fixed base and a mounting plate. The fixed base is set as an L-shaped steel plate, and height adjustment holes I and horizontal adjustment holes are respectively arranged on two vertical plate surfaces of the L-shaped steel plate. Both the height adjustment hole and the horizontal adjustment hole are set as waist-shaped holes. One end of the fixed base is connected to the mounting plate through the height adjustment hole I, and the other end of the fixed base is connected to the positioning base through the horizontal adjustment hole.

[0011] Further, strip-shaped mounting holes and height adjustment holes II are arranged along the length direction of the mounting plate. Proximity switches I, II, and III are installed in the strip-shaped mounting holes, and the height adjustment holes II are connected to the height adjustment holes I through adjustment bolts.

[0012] Further, fastening nuts are provided on the proximity switch I, the proximity switch II, and the proximity switch III. After passing through the strip-shaped mounting holes, the proximity switch I, the proximity switch II, and the proximity switch III are pre-tensioned and positioned by the fastening nuts.

[0013] Further, the electric cylinder includes a cylinder body, a lead screw, and a movable cylinder sleeve. A lead screw is rotatably connected in the cylinder body. A nut on the lead screw is connected to the movable cylinder sleeve. The cylinder body is connected to the vibration table frame, and the lead screw is connected to the positioning base. The movable end of the electric cylinder is the end of the movable cylinder sleeve. The height at the center of the sensing surface of the proximity switch II is flush with the height of the end of the movable cylinder sleeve when the vibration table frame is horizontal.

[0014] A method for finding the origin of a continuous casting mold vibration system, using the origin-finding device described above, includes the following steps:

[0015] 1) Input a control command for finding the origin into the PC to the PLC control unit. The electric cylinder operates according to the preset vibration trajectory in the PLC control unit. The electric cylinder controls the movable cylinder sleeve to move down step by step. When the movable cylinder sleeve approaches the sensing surfaces of the proximity switch I, the proximity switch II, and the proximity switch III in sequence and reaches the operating distance, the proximity switch I, the proximity switch II, and the proximity switch III act in sequence and transmit switch signals to the PLC control unit.

[0016] 2) When the PLC control unit simultaneously detects the three switch signals of the proximity switch I, the proximity switch II, and the proximity switch III, the PLC control unit controls the movable cylinder sleeve of the electric cylinder to move up step by step. When the switch signal of the proximity switch III disappears, the movable cylinder sleeve continues to move up step by step until the switch signal of the proximity switch II disappears, and the movable cylinder sleeve stops moving up step by step.

[0017] 3) The PLC control unit controls the movable cylinder sleeve of the electric cylinder to move down step by step until the switch signal of the proximity switch II appears for the second time. The signal of the second appearance of the switch signal of the proximity switch II is communicated with the PC through the PLC control unit to display a signal indicating successful origin finding.

[0018] Further, in steps 1), 2), and 3), the states of the switch signals of the proximity switch I 52, the proximity switch II 53, and the proximity switch III 53 are displayed on the control interface of the InTouch software of the PC through the PLC control unit.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention adds proximity switch I and proximity switch III around the electric cylinder according to the vibration stroke of the continuous casting vibration system. The distance between the two proximity switches is the maximum stroke of the electric cylinder in one action cycle. Therefore, it is convenient for the staff to judge the vibration direction and cycle times of the electric cylinder. A proximity switch II for finding the origin is set between the two proximity switches. The position of proximity switch II is the position of the movable end of the electric cylinder when the vibration table returns to the horizontal position, that is, the mechanical origin position of the continuous casting vibration system. When the electric cylinder moves according to the set vibration trajectory and the movable end of the electric cylinder approaches the proximity switch and reaches the action distance, the corresponding proximity switch outputs a switch signal. When the electric cylinder approaches proximity switch II again after a vibration cycle and proximity switch II outputs a switch signal, the origin finding is successful. The origin is found through the action states of proximity switch I, proximity switch II and proximity switch III, which makes the origin finding highly reliable and accurate. Moreover, there is no need for workers to observe and repeatedly debug on site, improving the efficiency of the origin finding operation and reducing the labor intensity of workers.

[0021] 2. Specifically, the origin finding device inputs instructions through the control interface of the InTouch software of the PC and communicates with the PLC control unit. The PLC control unit controls the action of the electric cylinder through the switch signals of proximity switch I, proximity switch II and proximity switch III to reach the mechanical origin of the continuous casting vibration system, realizing the automatic control of origin finding, with accurate positioning and high efficiency, making the operation more convenient. Signal instructions can be input on the control interface of the InTouch software to make the PLC control unit execute commands. At the same time, the changes of the switch signals of proximity switch I, proximity switch II and proximity switch III can also be observed in real time on the control interface of the InTouch software to judge the working state of the device, further improving the reliability of the device and reducing the failure rate of the device.

[0022] 3. The origin finding detection component includes an adjustment bracket and proximity switch I, proximity switch II and proximity switch III installed thereon. Two or more groups of origin finding detection components are provided, and multiple proximity switch Is are connected in parallel, multiple proximity switch IIs are connected in parallel, and multiple proximity switch IIIs are connected in parallel. When one of the proximity switches of the same type fails, the other proximity switches of the same type can still work, extending the service life of the device and improving the reliability of the device in use.

[0023] 4. The adjustment bracket therein includes a fixed base and a mounting plate. Height adjustment holes I and II for adjusting the height of the mounting plate are respectively provided on the fixed base and the mounting plate. The height adjustment holes I and II are connected by an adjustment bolt. A strip-shaped mounting hole for adjusting three proximity switches is also provided on the fixed base. Therefore, a cyclic action stroke of the electric cylinder can be obtained according to the vibration trajectory of the continuous casting vibration system. The height of the mounting plate can be adjusted according to different cyclic action strokes of the electric cylinder. The mounting position of the proximity switches can also be adjusted within the strip-shaped mounting hole to adjust the distance between proximity switch I and proximity switch III. Moreover, the position of proximity switch II can be adjusted according to the position of the movable end of the electric cylinder when the vibration table returns to the horizontal position. The position adjustment of the three proximity switches is convenient, improving the versatility of the device. A horizontal adjustment hole is provided on the mounting plate, and the distance between the three proximity switches and the outer wall of the movable cylinder sleeve of the electric cylinder can be adjusted according to factors such as the working environment, so that the distance between the sensing surface of the proximity switch and the movable cylinder sleeve of the electric cylinder reaches the operating distance of the proximity switch, enabling the proximity switch to respond quickly, further improving the accuracy and efficiency of origin seeking.

[0024] 5. The origin seeking method involved in the present invention is as follows: First, the electric cylinder operates until the movable cylinder sleeve therein approaches and reaches the operating distance from the sensing surfaces of the three proximity switches, causing the three proximity switches to operate and transmit switch signals to the PLC control unit, and then transmitted to the PC for display that all three proximity switches are working properly, ensuring the reliability of detection. Then, the movable cylinder sleeve of the electric cylinder moves up in a jogging motion until the switch signal of proximity switch III disappears. To make the origin seeking position more accurate, the movable cylinder sleeve of the electric cylinder moves down in a jogging motion until the switch signal of proximity switch II appears for the second time, then it is determined that the origin seeking is successful, preventing the position of the movable cylinder sleeve of the electric cylinder from being significantly different from the mechanical origin position when the switch signal of proximity switch II disappears, and causing the movable cylinder sleeve of the electric cylinder to move down for further detection, improving the accuracy of origin seeking.

[0025] In summary, the origin seeking device involved in the present invention has a simple structure, is convenient for installation and adjustment, has strong versatility, a long service life, is easy to operate, realizes automatic control of origin seeking, eliminates the need for workers to observe and repeatedly debug on site, improves the efficiency and accuracy of origin seeking operations, reduces the labor intensity of workers, increases the rhythm of continuous casting, reduces mechanical failures of the electric cylinder, reduces breakout accidents caused by the continuous casting vibration system, and at the same time improves the quality of the cast slab. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The content expressed in each drawing of the specification of the present invention and the marks in the drawings are briefly described below:

[0027] Figure 1 is a schematic structural diagram of the origin seeking device in the present invention;

[0028] Figure 2 This is the control schematic diagram of the origin-finding device in the present invention;

[0029] Figure 3 is Figure 1 the structural schematic diagram of the fixed base in;

[0030] Figure 4 is Figure 1 the structural schematic diagram of the mounting plate in;

[0031] The markings in the above figures are all: 1. Mold, 2. Vibration table frame, 3. Electric cylinder, 31. Cylinder block, 32. Lead screw, 33. Movable cylinder sleeve, 4. Positioning base, 5. Origin-finding detection component, 51. Adjusting bracket, 511. Fixed base, 512. Mounting plate, 513. Height adjustment hole Ⅰ, 514. Horizontal adjustment hole, 515. Strip-shaped mounting hole, 516. Height adjustment hole Ⅱ, 52. Proximity switch Ⅰ, 53. Proximity switch Ⅱ, 54. Proximity switch Ⅲ. Specific embodiments

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, 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. 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 circumstances.

[0034] The specific implementation scheme of the present invention is as follows: As Figure 1As shown in the figure, an origin seeking device for a continuous casting mold vibration system includes a mold 1, a vibration table frame 2, an electric cylinder 3, and a positioning base 4. The upper end of the vibration table frame 2 is connected to the mold 1, and the lower end of the vibration table frame 2 is connected to the positioning base 4 through the electric cylinder 3. The electric cylinder 3 operates according to a set motion trajectory to drive the vibration table frame 2 to vibrate, so that the mold 1 makes corresponding movements. A origin seeking detection component 5 is arranged on the positioning base 4. The origin seeking detection component 5 includes an adjustment bracket 51 and proximity switches I 52, proximity switches II 53, and proximity switches III 54 arranged in sequence from top to bottom along its height direction. The adjustment bracket 51 is connected to the positioning base 4. Due to the influence of external temperature and other factors, the actual operating distance of the proximity switch may be less than the rated operating distance. During installation, the distances between the proximity switches I 52, proximity switches II 53, and proximity switches III 54 and the outer wall of the movable end of the electric cylinder 3 are respectively less than or equal to the operating distances of the corresponding proximity switches. When the outer wall of the movable end of the electric cylinder 3 gradually approaches the corresponding proximity switch, the proximity switch can act in time, making the reaction more sensitive. The distance between the proximity switches I 52 and proximity switches III 54 is equal to the maximum stroke of one cycle of the motion trajectory of the electric cylinder 3. Therefore, when the proximity switch I 52 outputs a switch signal first and the proximity switch III 54 outputs a switch signal later, it can be judged that the electric cylinder is moving in the direction of the proximity switch III 54. The number of action cycles of the electric cylinder can be judged according to the number of disappearances of the proximity switch I 52 or proximity switch III 54. The height where the proximity switch II 53 is located is flush with the height of the movable end of the electric cylinder 3 when the vibration table frame 2 returns to the horizontal position, that is, the mechanical origin position of the continuous casting vibration system. When the electric cylinder 3 operates according to the set vibration trajectory and the movable end of the electric cylinder 3 approaches the proximity switch and reaches the operating distance, the corresponding proximity switch outputs a switch signal. When the electric cylinder 3 approaches the proximity switch II 53 again after a vibration cycle, and the proximity switch II 53 outputs a switch signal, the origin seeking is successful. By using the action states of the proximity switches I 52, proximity switches II 53, and proximity switches III 54 to seek the origin, the reliability and accuracy of origin seeking are strong, and there is no need for workers to observe and debug repeatedly on site, improving the efficiency of origin seeking operation and reducing the labor intensity of workers.

[0035] Specifically, as Figure 2As shown in the figure, the device further includes a PC and a PLC control unit connected thereto through an industrial Ethernet. Among them, proximity switch I 52, proximity switch II 53, and proximity switch III 54 are connected to the signal input terminal of the PLC control unit. The signal output terminal of the PLC control unit is electrically connected to the electric cylinder 3. The PLC control unit receives the switch signals generated by proximity switch I 52, proximity switch II 53, and proximity switch III 54 and controls the electric cylinder 3 to perform the operation of finding the origin. The PC is provided with InTouch software. The control interface of the InTouch software communicates with the PLC control unit through the industrial Ethernet. Signal instructions can be input on the control interface of the InTouch software to make the PLC control unit execute commands. At the same time, the changes in the switch signals of proximity switch I 52, proximity switch II 53, and proximity switch III 54 can also be observed in real time on the control interface of the InTouch software, which is used to judge the working state of the device, further improving the reliability of the device operation and reducing the failure rate of the device.

[0036] Specifically, as Figure 1 shown, two or more sets of origin-finding detection components 5 can be provided. Figure 1 Only two sets are shown in the figure. Two or more sets can also be provided according to needs. The proximity switch I 52 on multiple sets of origin-finding detection components 5 are connected in parallel with each other. The proximity switch II 53 on multiple sets of origin-finding detection components 5 are connected in parallel with each other. The proximity switch III 54 on multiple sets of origin-finding detection components 5 are connected in parallel with each other. When one of the proximity switches of the same type fails, the other proximity switches of the same type can still work, extending the service life of the device and improving the reliability of the device use. Optimally, in order to make the structure of multiple sets of origin-finding detection components 5 more compact after installation and reduce the occupied space, multiple sets of origin-finding detection components 5 can be installed around the electric cylinder 3. Of course, they can also be installed on the same side of the electric cylinder 3, as long as the heights of the sensing surfaces of the proximity switches of the same type can be made flush.

[0037] Specifically, as Figure 1 、 Figure 3 and Figure 4As shown in the figure, the adjusting bracket 51 includes a fixed base 511 and a mounting plate 512. The fixed base 511 is set as an L-shaped steel plate. Height adjusting holes Ⅰ 513 and horizontal adjusting holes 514 are respectively arranged on two vertical plate surfaces of the L-shaped steel plate. Both the height adjusting holes and the horizontal adjusting holes 514 are set as waist-shaped holes. One end of the fixed base 511 is connected to the mounting plate 512 through the height adjusting holes Ⅰ 513, and the other end of the fixed base 511 is connected to the positioning base 4 through the horizontal adjusting holes 514. The mounting plate 512 is provided with strip-shaped mounting holes 515 and height adjusting holes Ⅱ 516 along its length direction. A proximity switch Ⅰ 52, a proximity switch Ⅱ 53 and a proximity switch Ⅲ 54 are installed in the strip-shaped mounting holes 515, and the height adjusting holes Ⅱ 516 are connected to the height adjusting holes Ⅰ 513 through adjusting bolts. The mounting methods of the proximity switch Ⅰ 52, the proximity switch Ⅱ 53 and the proximity switch Ⅲ 54 are as follows: fastening nuts are arranged on the three proximity switches, external thread segments are arranged on the outer walls of the three proximity switches, and the proximity switch Ⅰ 52, the proximity switch Ⅱ 53 and the proximity switch Ⅲ 54 pass through the strip-shaped mounting holes 515 and are pre-tightened and positioned through the fastening nuts. Therefore, a cyclic action stroke of the electric cylinder can be obtained according to the vibration trajectory of the continuous casting vibration system. The relative position between the height adjusting holes Ⅱ 516 and the height adjusting holes Ⅰ 513 can be adjusted according to different cyclic action strokes of the electric cylinder to adjust the height of the mounting plate 512. The mounting positions of the proximity switches can also be adjusted in the strip-shaped mounting holes 515 to adjust the distance between the proximity switch Ⅰ 52 and the proximity switch Ⅲ 54. Moreover, the position of the proximity switch Ⅱ 53 can be adjusted according to the position of the movable end of the electric cylinder 3 when the vibration table 2 returns to the horizontal position. The position adjustment of the three proximity switches is convenient, which improves the versatility of the device. And a horizontal adjusting hole 514 is arranged on the mounting plate 512, and the distance between the three proximity switches and the movable end of the electric cylinder 3 can be adjusted according to factors such as the working environment, so that the distance between the sensing surface of the proximity switch and the outer wall of the movable end of the electric cylinder reaches the action distance of the proximity switch, enabling the proximity switch to respond quickly, further improving the accuracy and efficiency of finding the origin. The proximity switch Ⅰ 52, the proximity switch Ⅱ 53 and the proximity switch Ⅲ 54 can be set as proximity switches of the same model, and their action distances are the same. Therefore, the fixed position of the horizontal adjusting hole 514 needs to be adjusted to make the sensing surfaces of the three proximity switches in the same vertical plane.

[0038] Specifically, as Figure 1As shown in the figure, the electric cylinder 3 includes a cylinder block 31, a lead screw 32, and a movable cylinder sleeve 33. A lead screw 32 is rotatably connected inside the cylinder block 31. A nut on the lead screw 32 is connected to the movable cylinder sleeve 33. The cylinder block 31 is connected to the vibration table 2. The lead screw 32 is connected to the positioning base 4 through a threaded sleeve, so that the positioning base 4 will not rotate when the lead screw 32 rotates. Driven by a servo motor and a reducer, the lead screw 32 is driven to rotate through a synchronous belt. The lead screw 32 drives the nut thereon to move linearly along the lead screw 32, and the nut makes the movable cylinder sleeve 33 move linearly synchronously. Therefore, the movable end of the electric cylinder 3 is the end of the movable cylinder sleeve 33, and the height where the center of the sensing surface of the proximity switch II 53 is located is flush with the height where the end of the movable cylinder sleeve 33 is located when the vibration table 2 is horizontal.

[0039] The installation process of the above device is as follows: First, obtain a cyclic action stroke of the electric cylinder 3 according to the vibration trajectory of the continuous casting vibration system, and adjust the positions of the proximity switch I 52 and the proximity switch III 54 on the strip-shaped mounting hole 515 according to different cyclic action strokes of the electric cylinder 3, so that the distance between the proximity switch I 52 and the proximity switch III 54 is equal to the maximum stroke of a cyclic action of the electric cylinder 3; Then, according to the distance between the end of the movable cylinder sleeve 33 of the electric cylinder 3 and the positioning base 4 when the vibration table 2 returns to the horizontal position, that is, the installation height of the proximity switch II 52, adjust the relative position between the height adjustment hole II 516 and the height adjustment hole I 513 to adjust the height of the mounting plate 512, so that the proximity switch II 52 is installed between the proximity switch I 52 and the proximity switch III 54; Finally, adjust the distance between the three proximity switches and the outer wall of the movable cylinder sleeve 33 of the electric cylinder 3 according to factors such as the working environment, so that the distance between the sensing surface of the proximity switch and the outer wall of the movable cylinder sleeve 33 reaches the action distance of the proximity switch, and parallelly connect the same kind of proximity switches and electrically connect them to the signal input end of the PLC control unit.

[0040] The method for finding the origin using the above continuous casting mold vibration system origin finding device includes the following steps:

[0041] 1) Input the origin finding control command to the PLC control unit in the control interface of the InTouch software of the PC. The electric cylinder 3 operates according to the preset vibration trajectory in the PLC control unit. The electric cylinder 3 controls the movable cylinder sleeve 33 to move downward step by step. When the movable cylinder sleeve 33 approaches the sensing surfaces of the proximity switch I 52, the proximity switch II 53, and the proximity switch III 54 in sequence and reaches the action distance, the proximity switch I 52, the proximity switch II 53, and the proximity switch III 54 act in sequence and transmit the switch signal to the PLC control unit, and then it is transmitted to the control interface of the InTouch software of the PC to display that all three proximity switches are working properly, ensuring the reliability of the detection.

[0042] 2) When the PLC control unit simultaneously detects the switch signals of proximity switch I 52, proximity switch II 53, and proximity switch III 54, the PLC control unit controls the movable cylinder sleeve 33 of the electric cylinder 3 to jog up step by step. When the switch signal of proximity switch III 54 disappears, the movable cylinder sleeve 33 continues to jog up until the switch signal of proximity switch II 53 disappears, and then the movable cylinder sleeve 33 stops jogging up. The signals of the sequential disappearance of the switch signals of proximity switch III 54 and proximity switch II 53 can be displayed on the control interface of InTouch software on the PC.

[0043] 3) The PLC control unit controls the movable cylinder sleeve 33 of the electric cylinder 3 to jog down step by step until the switch signal of proximity switch II 53 appears for the second time. The signal of the second appearance of the switch signal of proximity switch II 53 is communicated through the PLC control unit and the control interface of InTouch software to display the signal of successful origin search. The origin search operation ends. This process prevents the position of the movable cylinder sleeve 33 of the electric cylinder 3 from being significantly different from the position of the mechanical origin when the switch signal of proximity switch II 53 disappears, enabling further detection of the downward movement of the movable cylinder sleeve of the electric cylinder and improving the accuracy of origin search.

[0044] In summary, the origin search device involved in the present invention has a simple structure, is convenient for installation and adjustment, has strong versatility, a long service life, is easy to operate, realizes automatic control of origin search, eliminates the need for workers to observe and repeatedly debug on-site, improves the efficiency and accuracy of origin search operations, reduces the labor intensity of workers, increases the rhythm of continuous casting, reduces mechanical failures of electric cylinders, reduces breakout accidents caused by the continuous casting vibration system, and at the same time improves the quality of cast billets.

[0045] As described above, only some principles of the present invention are illustrated by diagrams. This specification is not intended to limit the present invention to the specific structures and applicable scopes shown and described. Therefore, all possible corresponding modifications and equivalents that can be utilized belong to the scope of the patent applied for by the present invention.

Claims

1. A device for finding the origin of a continuous casting mold vibration system, characterized in that It includes a mold (1), a vibration stand (2), an electric cylinder (3) and a positioning base (4). The upper end of the vibration stand (2) is connected to the mold (1), and the lower end of the vibration stand (2) is connected to the positioning base (4) through the electric cylinder (3). A home position detection component (5) is provided on the positioning base (4). The home position detection component (5) includes an adjustment bracket (51) and proximity switches I (52), proximity switches II (53) and proximity switches III (54) arranged in sequence from top to bottom along its height direction. The adjustment bracket (51) is connected to the positioning base (4). The distance between the proximity switch I (52) and the proximity switch III (54) is equal to the maximum stroke of the action track of the electric cylinder (3). The height where the proximity switch II (53) is located is flush with the height of the movable end of the electric cylinder (3) when the vibration stand (2) returns to the horizontal position. The distances between the proximity switch I (52), the proximity switch II (53) and the proximity switch III (54) and the outer wall of the movable end of the electric cylinder (3) are respectively less than or equal to the rated action distances of the corresponding proximity switches. When the proximity switch I (52) outputs a switch signal first and the proximity switch III (54) outputs a switch signal later, it can be judged that the electric cylinder moves in the direction of the proximity switch III (54). The number of action cycles of the electric cylinder can be judged according to the number of disappearances of the proximity switch I (52) or the proximity switch III (54). The height where the proximity switch II (53) is located is flush with the height of the movable end of the electric cylinder (3) when the vibration stand (2) returns to the horizontal position, that is, the mechanical home position of the continuous casting vibration system. When the electric cylinder (3) moves according to the set vibration track and the movable end of the electric cylinder (3) approaches the proximity switch and reaches the action distance, the corresponding proximity switch outputs a switch signal. When the electric cylinder (3) approaches the proximity switch II (53) again after a vibration cycle, if the proximity switch II (53) outputs a switch signal, the home position search is successful. The home position is searched through the action states of the proximity switch I (52), the proximity switch II (53) and the proximity switch III (54). The adjustment bracket (51) includes a fixed base (511) and a mounting plate (512). The fixed base (511) is set as an L-shaped steel plate. Height adjustment holes Ⅰ (513) and horizontal adjustment holes (514) are respectively arranged on two vertical plate surfaces of the L-shaped steel plate. Both the height adjustment holes and the horizontal adjustment holes (514) are set as waist-shaped holes. One end of the fixed base (511) is connected to the mounting plate (512) through the height adjustment holes Ⅰ (513), and the other end of the fixed base (511) is connected to the positioning base (4) through the horizontal adjustment holes (514). A strip-shaped mounting hole (515) and height adjustment holes Ⅱ (516) are arranged along the length direction of the mounting plate (512). The proximity switch Ⅰ (52), proximity switch Ⅱ (53), and proximity switch Ⅲ (54) are installed in the strip-shaped mounting hole (515). The height adjustment holes Ⅱ (516) and the height adjustment holes Ⅰ (513) are connected by adjusting bolts. The electric cylinder (3) includes a cylinder body (31), a lead screw (32), and a movable cylinder sleeve (33). A lead screw (32) is rotatably connected in the cylinder body (31). A nut on the lead screw (32) is connected to the movable cylinder sleeve (33). The cylinder body (31) is connected to the vibration table frame (2), and the lead screw (32) is connected to the positioning base (4). The movable end of the electric cylinder (3) is the end of the movable cylinder sleeve (33). The height of the center of the sensing surface of the proximity switch Ⅱ (53) is flush with the height of the end of the movable cylinder sleeve (33) when the vibration table frame (2) is horizontal.

2. The origin seeking device for the continuous casting mold vibration system according to claim 1, characterized in that: The device further includes a PC and a PLC control unit connected thereto through an industrial Ethernet. The proximity switch Ⅰ (52), proximity switch Ⅱ (53), and proximity switch Ⅲ (54) are connected to the signal input ends of the PLC control unit. The signal output end of the PLC control unit is electrically connected to the electric cylinder (3).

3. The origin seeking device for the continuous casting mold vibration system according to claim 2, characterized in that: The InTouch software is set in the PC. The control interface of the InTouch software communicates with the PLC control unit through an industrial Ethernet.

4. The origin seeking device for the continuous casting mold vibration system according to claim 3, characterized in that: Two or more sets of origin search detection components (5) are provided. The proximity switch Ⅰ (52) on multiple sets of origin search detection components (5) are connected in parallel with each other. The proximity switch Ⅱ (53) on multiple sets of origin search detection components (5) are connected in parallel with each other. The proximity switch Ⅲ (54) on multiple sets of origin search detection components (5) are connected in parallel with each other. Multiple sets of the origin search detection components (5) are arranged around the electric cylinder (3).

5. The origin seeking device for the continuous casting mold vibration system according to claim 1, characterized in that: Fastening nuts are arranged on the proximity switch Ⅰ (52), proximity switch Ⅱ (53), and proximity switch Ⅲ (54). The proximity switch Ⅰ (52), proximity switch Ⅱ (53), and proximity switch Ⅲ (54) pass through the strip-shaped mounting hole (515) and are pre-tightened and positioned by the fastening nuts.

6. A method for finding the origin point of a continuous casting mold vibration system, which uses the origin point finding device described in any one of claims 1 to 5, characterized in that: Including the following steps: 1) Input the control command for origin seeking into the PC and send it to the PLC control unit. The electric cylinder (3) operates according to the preset vibration trajectory in the PLC control unit. The electric cylinder (3) controls the movable cylinder sleeve (33) to move down step by step in a jogging manner. When the movable cylinder sleeve (33) approaches the sensing surfaces of proximity switch I (52), proximity switch II (53), and proximity switch III (54) in sequence and reaches the operating distance, proximity switch I (52), proximity switch II (53), and proximity switch III (54) act in sequence and transmit the switch signals to the PLC control unit. 2) When the PLC control unit detects the three switch signals of proximity switch I (52), proximity switch II (53), and proximity switch III (54) simultaneously, the PLC control unit controls the movable cylinder sleeve (33) of the electric cylinder (3) to move up step by step in a jogging manner. After the switch signal of proximity switch III (54) disappears, the movable cylinder sleeve (33) continues to move up step by step in a jogging manner until the switch signal of proximity switch II (53) disappears, and then the movable cylinder sleeve (33) stops moving up step by step in a jogging manner. 3) The PLC control unit controls the movable cylinder sleeve (33) of the electric cylinder (3) to move down step by step in a jogging manner until the switch signal of proximity switch II (53) appears for the second time. The signal that the switch signal of proximity switch II (53) appears for the second time is communicated through the PLC control unit with the PC to display the signal indicating successful origin seeking.

7. The method for finding the origin point of the continuous casting mold vibration system according to claim 6, characterized in that: In steps 1), 2), and 3) above, the states of the switch signals of proximity switch I (52), proximity switch II (53), and proximity switch III (54) are transmitted through the PLC control unit to the control interface of the InTouch software on the PC for display.

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