An automatic adjustment system for the head-to-tail rolling interval of wire billets

Abstract

The present invention provides an automatic adjustment system for the head and tail rolling interval of a wire billet, and relates to the technical field of billet production and processing. The automatic adjustment system for the head and tail rolling interval of a wire billet comprises a rolling platform, and the upper surface of the rolling platform is equipped with a furnace roller, an operating box, a flying shear transmission cabinet, a flying shear operating table, a rolling mill body and a rolling mill transmission cabinet. A flying shear is arranged on the top of the flying shear operating table. A connecting guide plate is fixedly connected to the upper end of the flying shear operating table close to the rolling mill body, and the bottom end of the connecting guide plate is fixedly connected to each other through a supporting triangular steel frame and the flying shear operating table. A heat detection mechanism is arranged on the upper side of both ends of the furnace roller and the upper end of the middle part of the connecting guide plate. The rolling speed adjustment under automatic control is realized by automatically adjusting the head and tail rolling speed, and when the rolling interval is too close, the control program can be used to automatically respond, control the flying shear to automatically shear, and control the interval to be stable.

Description

Technical Field

[0001] The invention relates to the technical field of steel billet production and processing, and in particular to an automatic adjustment system for the head-to-tail rolling interval of a wire steel billet. Background Art

[0002] On the full continuous rolling high-speed wire production line, the billet is heated by the heating furnace, and then sent to the main rolling mill for rolling through the walking beam of the heating furnace, the cantilever roller in the discharge furnace and the operation of the discharge roller. Due to the influence of factors such as the mechanical properties of the billet, the friction coefficient of the roller, the weight and length of the billet, and the change of friction when biting into the rolling mill, the residence time of the billet on the roller will fluctuate greatly, resulting in the instability of the steel tapping rhythm. The steel tapping interval time has been fluctuating between 3.8 seconds and 6.8 seconds, which seriously affects the rolling rhythm and reduces the shift output.

[0003] At the same time, once the steel-out rhythm is less than 4 seconds, the operator is required to manually cut the billet to prevent steel piling on the rolling line due to the two billets being too close. The operation process is no less than dealing with a steel piling accident, which increases the labor intensity of the operator and increases unnecessary billet consumption. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides an automatic adjustment system for the top and tail rolling interval of a wire billet, which solves the problem that the rhythm of the existing wire billet rolling is controlled by the steel tapping timing of the furnace roller, which is very unstable and easily leads to steel piling in the rolling wire.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic adjustment system for the top and tail rolling interval of a wire steel billet, comprising a rolling platform, the upper surface of the rolling platform is equipped with a furnace discharge roller, an operating box, a flying shear transmission cabinet, a flying shear operating table, and a plurality of rolling mill bodies and rolling mill transmission cabinets of the same number and arranged in a corresponding front and rear direction, the plurality of rolling mill bodies are arranged linearly, the furnace discharge roller is arranged at the left end of the rolling mill body, the flying shear operating table is arranged at the right end of the rolling mill body, and the flying shear transmission cabinet is arranged at the front side of the flying shear operating table, a flying shear is arranged at the top of the flying shear operating table, a connecting guide plate is fixedly connected to the upper end of the flying shear operating table close to the rolling mill body, and the bottom end of the connecting guide plate is fixedly connected to each other through a supporting triangular steel frame and the flying shear operating table, and a heat detection mechanism is arranged on the upper side of both ends of the furnace discharge roller and on the upper end of the middle part of the connecting guide plate.

[0008] Preferably, the thermal detection mechanism includes a connecting bracket, a thermal detection display, a thermal detection processor and a hot metal detector. The connecting bracket is configured as a door frame type structure, and a hot metal detector is arranged in the middle of the top inner side of the connecting bracket, a thermal detection processor is fixedly connected to the top outer side of the connecting bracket, a thermal detection display is arranged on one side of the thermal detection processor, and the thermal detection display is electrically connected to the hot metal detector and the thermal detection display.

[0009] Preferably, the rolling mill body includes a steel rolling operating table, a mobile roller, an inverted L-shaped connecting frame, a hydraulic cylinder, a connecting pressure rod, a lower pressure plate, a steel rolling roller, a reduction motor, a synchronous motor and an auxiliary telescopic rod. Mobile rollers are arranged on both sides of the upper end of the steel rolling operating table. The steel rolling operating table is fixedly connected to the reduction motor on both sides of the upper end on the side close to the rolling mill transmission cabinet, and the reduction motor driving end is fixedly connected to the mobile roller through the rotating shaft passing through the steel rolling operating table. The steel rolling operating table is fixedly connected to the inverted L-shaped connecting frame on the side away from the rolling mill transmission cabinet, and the cross plate of the inverted L-shaped connecting frame faces the rolling mill transmission cabinet. The inverted L-shaped A hydraulic cylinder is fixedly connected to the middle part of the top end of the connecting frame cross plate, and a connecting pressure rod is fixedly connected to the lower driving end of the hydraulic cylinder, and the middle part of the connecting pressure rod passes through the inverted L-shaped connecting frame cross plate, and the bottom end of the connecting pressure rod is fixedly connected to the lower pressure plate, and auxiliary telescopic rods are fixedly connected to the four corners of the upper surface of the lower pressure plate, and the upper ends of the auxiliary telescopic rods are fixedly connected to the lower surface of the inverted L-shaped connecting frame cross plate, and steel rolling rollers are arranged on both sides of the bottom end of the lower pressure plate, and synchronous motors are fixedly connected to both sides of the lower end of the lower pressure plate close to the rolling mill transmission cabinet, and the driving ends of the synchronous motors are fixedly connected to the steel rolling rollers through the rotating shaft passing through the lower pressure plate.

[0010] Preferably, the synchronous motors are fixedly connected to each other via encoders and rolling mill transmission cabinets, the reduction motors are fixedly connected to the rolling mill transmission cabinet, and the rolling mill transmission cabinet is electrically connected to the encoder and the reduction motor via the synchronous motor, the flying shear movable end at the top of the flying shear is fixedly connected to the servo motor driving end, the flying shear operating table and the flying shear transmission cabinet are fixedly connected to each other, and the flying shear transmission cabinet is electrically connected to the servo motor via an internal coding structure.

[0011] Preferably, the operating box, rolling mill transmission cabinet and flying shear transmission cabinet are fixedly connected to each other through a wiring harness tube, a plurality of wiring harness structures are arranged inside the wiring harness tube, and a plurality of data lines for controlling the operating box, rolling mill transmission cabinet and flying shear transmission cabinet to be connected to each other are arranged inside the wiring harness tube.

[0012] Preferably, the heat inspection mechanism is interconnected with an operation box via a data transmission serial port, a PLC central control system is arranged inside the operation box, the PLC central control system can be externally connected to a computer to realize control and display using WINCC configuration software, and the operation box is electrically connected to a rolling mill transmission cabinet and a flying shear transmission cabinet.

[0013] Preferably, the number of the rolling mill bodies is set to 7, and the main logical steps of the operation of the PLC central control system include:

[0014] S1. Control the external mechanical grabber to roll the wire billet head and tail into the heating furnace;

[0015] S2. The steel billet generated by heating in the heating furnace is sent to the furnace discharge roller table through the walking beam action. At this time, the steel billet is heat-tested by the heat detection mechanism, and the heat signal information obtained by the heat detection is used to control the connected rolling mill body to perform delayed operation;

[0016] S3. Wait for the calculation of the time interval between the last time the walking beam controlled the billet to be sent onto the furnace roller and the next time the walking beam controlled the billet to be sent onto the furnace roller. Meanwhile, calculate and control the time interval between each billet reaching the connecting rolling mill body and the tail of the previous billet leaving the connecting rolling mill. Count whether it is less than four seconds. If the time interval is less than four seconds, control the flying shear head of the flying shear to move, increase the flying shear length of the billet by 300 mm, and control the flying shear to shear the billet when it reaches the flying shear operating table.

[0017] Preferably, the logic judgment step of performing heat inspection on the steel billet and controlling the connection of the rolling mill in step S2 specifically includes:

[0018] a1. The hot metal detector measures the temperature on the furnace roller to obtain a heat signal. When the billet passes through and the heat signal obtained by the hot metal detector disappears, the speed of the connected rolling mill is controlled to decrease by 30%, and then the connected rolling mill body is controlled to achieve a delayed operation of speed reduction;

[0019] a2. When the next billet moves to the connected rolling mill body, the delay time can be controlled to be reached, and the speed of the rolling mill body returns to the original speed.

[0020] (III) Beneficial effects

[0021] The present invention provides a wire billet head-end rolling interval automatic adjustment system. It has the following beneficial effects:

[0022] 1. The present invention is provided with an operation box which is internally provided with a PLC central control system and can be externally connected to a computer using WINCC configuration software, an encoder connected thereto through a data line, a rolling mill body and a rolling mill transmission cabinet. When the steel-out rhythm changes due to the change of rolling specifications, the steel-out timing can be adjusted through the adjustment window on the WINCC control screen. At this time, the tail of the previous steel billet is being rolled in the rolling mill body near the furnace-out roller, and when the head of the next steel billet bites into the rolling mill body near the furnace-out roller, the rolling mill body automatically slows down, and the deformation amount of the steel billet after rolling through the rolling mill body near the furnace-out roller is calculated through the feedback value of the encoder, and when the head of the steel billet bites into the next rolling mill body, the first rolling rolling mill body resumes to a normal speed for rolling. In summary, the stability of the rolling rhythm can be effectively controlled, thereby realizing the rolling speed adjustment under automatic control.

[0023] 2. The present invention is provided with an operation box which is internally provided with a PLC central control system and can be externally connected to a computer using WINCC configuration software, an encoder connected thereto through a data line, a flying shear, a servo motor and a flying shear transmission cabinet. When the rhythm of the head and tail of the steel billet caused by other variables is less than 2.5 seconds, the rhythm of the rolling line looper and the landing sleeve cannot meet the demand. At this time, the automatic head cutting control function of the flying shear 9 which automatically controls the rolling rhythm will be used. Since the flying shear 9 monitors the rolling rhythm in real time, when the detected rolling rhythm is too close, the head cutting length will be automatically adjusted during the head cutting to control the interval stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a main perspective schematic diagram of the present invention;

[0025] Figure 2 It is a side perspective schematic diagram of the internal structure of the rolling mill body of the present invention;

[0026] Figure 3 It is a side perspective schematic diagram of the rolling mill main body connection structure of the present invention;

[0027] Figure 4 It is a front perspective schematic diagram of the shearing machine connection structure of the present invention;

[0028] Figure 5 for Figure 1 The enlarged view of point A in the middle;

[0029] Figure 6 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 7 It is the system logic diagram of the present invention.

[0031] Among them, 1. rolling platform; 2. heat inspection mechanism; 201. connecting bracket; 202. heat inspection display; 203. heat inspection processor; 204. hot metal detector; 3. furnace roller; 4. rolling mill body; 401. steel rolling operation table; 402. moving roller; 403. inverted L-shaped connecting frame; 404. hydraulic cylinder; 405. connecting pressure rod; 406. lower pressure plate; 407. steel rolling roller; 408. reduction motor; 409. synchronous motor; 410. auxiliary telescopic rod; 5. rolling mill transmission cabinet; 6. encoder; 7. wiring harness tube; 8. flying shear operation table; 9. flying shear; 10. connecting guide plate; 11. supporting triangular steel frame; 12. servo motor; 13. flying shear transmission cabinet; 14. operation box. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] Embodiment 1:

[0034] The embodiment of the present invention provides an automatic adjustment system for the head and tail rolling interval of a wire steel billet, comprising a rolling platform 1, wherein the upper surface of the rolling platform 1 is provided with a furnace roller table 3, an operation box 14, a flying shear transmission cabinet 13, a flying shear operating table 8, a plurality of rolling mill bodies 4 and a rolling mill transmission cabinet 5 which are arranged in the same number and in a corresponding front and rear manner, wherein the plurality of rolling mill bodies 4 are arranged linearly, the furnace roller table 3 is arranged at the left end of the rolling mill body 4, the flying shear operating table 8 is arranged at the right end of the rolling mill body 4, and the flying shear transmission cabinet 13 is arranged at the front side of the flying shear operating table 8, and the flying shear A flying shear 9 is arranged on the top of the operating platform 8, and a connecting guide plate 10 is fixedly connected to the upper end of the flying shear operating platform 8 close to the rolling mill body 4. The bottom end of the connecting guide plate 10 is fixedly connected to the flying shear operating platform 8 through a supporting triangular steel frame 11. A heat inspection mechanism 2 is arranged on the upper sides of both ends of the discharge roller 3 and on the upper middle end of the connecting guide plate 10, which can solve the problem that the rhythm of the existing wire rod steel billet is controlled by the steel tapping timing of the discharge roller 3 during rolling, which is very unstable and easily leads to steel piling in the rolling wire, thereby avoiding unnecessary consumption of steel billets.

[0035] The thermal inspection mechanism 2 includes a connecting bracket 201, a thermal inspection display 202, a thermal inspection processor 203 and a hot metal detector 204. The connecting bracket 201 is configured as a door frame structure, and a hot metal detector 204 is disposed in the middle of the inner top side of the connecting bracket 201, and a thermal inspection processor 203 is fixedly connected to the outer top of the connecting bracket 201. A thermal inspection display 202 is disposed on one side of the thermal inspection processor 203. The thermal inspection display 202 is electrically connected to the hot metal detector 204 and the thermal inspection display 202. When the steel billet passes through the hot metal detector 204 of the thermal inspection mechanism 2 on the furnace discharge roller 3, a signal output will be generated, and when the steel billet leaves the hot metal detector 204 of the thermal inspection mechanism 2, the output signal will disappear.

[0036] The rolling mill body 4 includes a rolling mill operating table 401, a mobile roller 402, an inverted L-shaped connecting frame 403, a hydraulic cylinder 404, a connecting pressure rod 405, a lower pressure plate 406, a rolling mill roller 407, a reduction motor 408, a synchronous motor 409 and an auxiliary telescopic rod 410. Mobile rollers 402 are arranged on both sides of the upper end of the rolling mill operating table 401. The rolling mill operating table 401 is fixedly connected to the reduction motor 408 on both sides of the upper end of the side close to the rolling mill transmission cabinet 5, and the reduction motor 408 driving end is fixedly connected to the mobile roller 402 through the rotating shaft passing through the rolling mill operating table 401. The rolling mill operating table 401 is fixedly connected to the side away from the rolling mill transmission cabinet 5 with an inverted L-shaped connecting frame 403, and the horizontal plate of the inverted L-shaped connecting frame 403 faces the rolling mill transmission cabinet 5. A hydraulic cylinder 404 is fixedly connected to the middle of the top of the cross plate of the L-shaped connecting frame 403, and a connecting pressure rod 405 is fixedly connected to the lower driving end of the hydraulic cylinder 404, and the middle part of the connecting pressure rod 405 passes through the cross plate of the inverted L-shaped connecting frame 403, and the bottom end of the connecting pressure rod 405 is fixedly connected to a lower pressure plate 406, and auxiliary telescopic rods 410 are fixedly connected to the four corners of the upper surface of the lower pressure plate 406, and the upper ends of the auxiliary telescopic rods 410 are fixedly connected to the lower surface of the cross plate of the inverted L-shaped connecting frame 403, and steel rolling rollers 407 are arranged on both sides of the bottom end of the lower pressure plate 406, and synchronous motors 409 are fixedly connected to both sides of the lower end of the lower pressure plate 406 close to the rolling mill transmission cabinet 5, and the driving ends of the synchronous motors 409 are fixedly connected to the steel rolling rollers 407 through the rotating shaft passing through the lower pressure plate 406.

[0037] The synchronous motors 409 are fixedly connected to each other through the encoder 6 and the rolling mill transmission cabinet 5, the reduction motors 408 are fixedly connected to the rolling mill transmission cabinet 5, and the rolling mill transmission cabinet 5 is electrically connected to the encoder 6 and the reduction motor 408 through the synchronous motor 409, the flying shear movable end of the top of the flying shear 9 is fixedly connected to the driving end of the servo motor 12, the flying shear operating table 8 and the flying shear transmission cabinet 13 are fixedly connected to each other, and the flying shear transmission cabinet 13 is electrically connected to the servo motor 12 through the internal coding structure.

[0038] The operation box 14, the rolling mill transmission cabinet 5 and the flying shear transmission cabinet 13 are fixedly connected to each other through the wiring harness tube 7. A plurality of harness structures are arranged inside the wiring harness tube 7, and a plurality of data lines for controlling the operation box 14, the rolling mill transmission cabinet 5 and the flying shear transmission cabinet 13 to be connected to each other are arranged inside the wiring harness tube 7.

[0039] The heat detection mechanism 2 is connected to the operation box 14 through the data transmission serial port. The operation box 14 is provided with a PLC central control system. The PLC central control system can be connected to an external computer and use the WINCC configuration software to realize control and display. The operation box 14 is electrically connected to the rolling mill transmission cabinet 5 and the flying shear transmission cabinet 13. The distance between the hot metal detector 204 for detecting the steel billet and the center line of the No. 1 rolling mill is fixed. When the hot metal detector 204 detects the tail of the steel billet, it will transmit the signal to the PLC. Then the PLC calculates the time when the tail of the steel billet will pass through the No. 1 rolling mill body 4 according to the speed of the furnace roller 3 and the linear speed of the rolling mill body 4, and converts the number of pulses installed on the encoder 6 according to the time and the current speed. When the number of pulses calculated by the program is compared with the number of pulses of the encoder 6 actually collected and they are consistent, A signal is issued to allow steel tapping, and the billet waiting on the discharge cantilever roller will move to the discharge roller 3 through the operation of the discharge roller and reach the position of the No. 1 rolling mill body 4 to start rolling. If the steel tapping rhythm changes due to the change of rolling specifications, the steel tapping timing can also be adjusted through the adjustment window on the WINCC control screen. At this time, the tail of the previous billet is being rolled in the No. 1 rolling mill body 4. When the head of the next billet bites into the No. 1 rolling mill body 4, the rolling mill body 4 automatically slows down, and the deformation of the billet after rolling through the No. 1 rolling mill body 4 is calculated through the feedback value of the encoder 6. When the head of the last billet reaches the No. 2 rolling mill body 4, and then when the head of the billet bites into the No. 2 rolling mill body 4, the No. 1 rolling mill body 4 returns to normal speed for rolling, which can effectively control the stability of the rolling rhythm.

[0040] At this time, if the rhythm of the head and tail of the steel billet is lower than 2.5 seconds due to other variables, the rhythm of the rolling line looper lifting and lowering sleeve will not be able to meet the demand. At this time, the automatic control function of the flying shear 9 to automatically control the rolling rhythm will be used. The flying shear 9 monitors the rolling rhythm in real time. When the detected rolling rhythm is too close, the cutting length will be automatically adjusted during the head cutting to meet the rolling interval requirements.

[0041] The number of rolling mill bodies 4 is set to 7, and they are numbered 1-7 from the furnace roller table 3 to the flying shear operation table 8. The main logical steps of the PLC central control system operation include:

[0042] S1. Control the external mechanical gripper arm to roll the wire billet head and tail into the heating furnace. When the last billet is transported out of the furnace door through the discharge cantilever from the roller conveyor, the hot metal detector 204 of the heat detection mechanism 2 at the furnace door will detect that the billet has completely left the furnace. At this time, the walking beam will automatically circulate positively and park the billet on the discharge cantilever roller conveyor to wait for the signal command to allow steel discharge;

[0043] S2. The steel billet generated by heating in the heating furnace is sent to the furnace roller table 3 through the walking beam action. At this time, the steel billet is heat-tested by the heat detection mechanism 2, and the heat signal information obtained by the heat detection process is used to control the connected rolling mill body 4 to perform delayed operation;

[0044] S3. Wait for calculating the time interval between the last time the walking beam controlled the steel billet to be fed onto the furnace roller 3 and the next time the walking beam controlled the steel billet to be fed onto the furnace roller 3, and at the same time calculate and control the time interval between each steel billet reaching the connecting rolling mill body 4 and the tail of the previous steel billet leaving the connecting rolling mill, and count whether it is less than four seconds. If the time interval is less than four seconds, control the flying shear head of the flying shear machine 9 to move, so that the flying shear length of the steel billet is increased by 300 mm, and control the flying shear machine 9 to shear the steel billet when the steel billet reaches the flying shear operating table 8.

[0045] The logical judgment step of performing heat inspection on the steel billet in step S2 to control the connection of the rolling mill specifically includes:

[0046] a1. On the furnace roller 3, the hot metal detector 204 is used to measure the temperature and obtain a heat signal. When the billet passes through the hot metal detector 204, the heat signal obtained by the temperature measurement disappears, and the speed of the connected rolling mill is controlled to decrease by 30%. After that, the connected rolling mill body 4 is controlled to realize the delayed operation of speed reduction;

[0047] a2. When the next billet moves to the connected rolling mill body 4, the delay time can be controlled to be reached, and the speed of the rolling mill body 4 is restored to the original speed.

[0048] At the position of the No. 1 rolling mill body 4, a head-to-tail state is formed and the rolling mill body 4 enters the No. 1 rolling mill body 4 for rolling. However, the action cycle of equipment such as the rolling line looper must also be considered. Therefore, it is necessary to adjust the control speed of the No. 1 rolling mill body 4, so that when the tail of the previous steel billet leaves the No. 1 rolling mill body 4, the speed of the rolling mill body 4 drops by 30%. After the speed drops, the next steel billet is continuously extending from the No. 1 rolling mill body 4 to the No. 2 rolling mill body 4. When the head of the steel billet reaches the No. 2 rolling mill body 4, the No. 1 rolling mill body 4 restores the original control speed, thereby achieving a stable rolling rhythm controlled between 2.5 and 3 seconds. At the same time, when the head-to-tail rolling in the No. 1 rolling mill body 4 does not control the interval to more than 2.5 seconds due to the speed reduction, the flying shear control program will automatically respond to increase the shear length of the steel head by 30CM, so as to effectively ensure the stability of the rolling interval.

[0049] Embodiment 2:

[0050] The control system realizes unmanned operation and can run automatically by simply setting parameters on the control computer screen.

[0051] The specific control process is as follows:

[0052] Program segment 1: Reduce the speed of data transmission according to the set time and length;

[0053] Program segment 2: When the main body 4 of the No. 1 rolling mill bites the steel, when the main body 4 of the No. 2 rolling mill also bites the steel, the intermediate signal M24.0 is set;

[0054] Program segment 3: After M24.0 is set, if the main body 4 of the No. 1 rolling mill also bites the steel, M55.2 is set;

[0055] Program segment 4: After M55.2 has a signal, compare the actual encoder 6 pulse number MD314 and the set encoder 6 pulse number MD266 to see if they are consistent. If they are consistent, set M55.4 and output indicator light Q125.6. M55.4 is reset after being set for 3 seconds;

[0056] Program segment 5: After M55.4 has a signal, 0 is transmitted to MD266;

[0057] Program segment 6: When there is a signal, the left heat detection mechanism 2 on the furnace roller 3 is connected with a delay of 100ms, and M24.3 is connected, and the delay is 100ms when it is disconnected;

[0058] Program segment 7: When M24.3 changes from signal to no signal (the signal of the left heat detection mechanism 2 changes from signal to no signal), if the main body 4 of the No. 1 rolling mill has bitten the steel, the M24.5 signal is set;

[0059] Program segment 8: When the load signal of the No. 2 rolling mill main body 4 arrives, if the No. 1 rolling mill main body 4 also has a load signal, then the M92.1 signal is set;

[0060] Program segment 9: If the time MW310 set on the screen is less than 130, then 130 is transmitted to MW310;

[0061] Program segment 10: Transfer the value in MW310 to the intermediate variable #temp10-1, then multiply the data in #temp10-1 by 90000 and save the result in #temp10-1, divide the data in #temp10-1 by the data in MD256 and save the result in #temp10-1, then multiply the data in #temp10-1 by 10 and save the result in MD288;

[0062] Program segment 11: When M24.5 has a signal, M57.0 is set; when M57.7 has a signal, M57.0 is set;

[0063] Program segment 12: When M57.0 has a signal, if the data in MD296 is greater than or equal to 313, M57.7 is set. If M57.7 has a signal, it will be reset after a delay of 3 seconds;

[0064] Program segment 13: When M92.1 has a signal, M92.2 is set. If M92.3 has a signal, M92.2 is reset;

[0065] Program segment 14: When M92.2 has a signal, if the value in MD292 is greater than or equal to MD288, M92.3 is set and the signal indicator Q125.7 is output. If M92.3 has a signal, M92.3 is reset after a delay of 3 seconds;

[0066] Program segment 15: When M57.7 has a signal, 0 is transmitted to MD296;

[0067] Program segment 16: When M92.3 or M190.2 has a signal, 0 is transmitted to MD300 and MD292.

[0068] Flying shear response control program segment: When the rolling wire interval time is less than 4 seconds and the signal is given to the flying shear, the flying shear length signal set in the flying shear control program increases by 300mm.

[0069] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wire rod billet head and tail rolling interval automatic adjustment system, comprising a rolling platform (1), the rolling platform (1) having an upper surface equipped with a furnace discharge roller table (3), an operation box (14), a flying shear transmission cabinet (13), a flying shear operating table (8), a plurality of rolling mill bodies (4) and rolling mill transmission cabinets (5) arranged in the same number and in a corresponding front and rear arrangement, the plurality of rolling mill bodies (4) being arranged linearly, the furnace discharge roller table (3) being arranged at the left end of the rolling mill body (4), the flying shear operating table (8) being arranged at the right end of the rolling mill body (4), and the flying shear transmission cabinet (13) being arranged in front of the flying shear operating table (8), and a flying shear (9) being arranged at the top of the flying shear operating table (8), characterized in that: A connecting guide plate (10) is fixedly connected to the upper end of the flying shear operating table (8) close to the rolling mill body (4); the bottom end of the connecting guide plate (10) is fixedly connected to the flying shear operating table (8) via a supporting triangular steel frame (11); a heat detection mechanism (2) is provided along the upper sides of both ends of the roller conveyor (3) and the middle upper end of the connecting guide plate (10); the heat detection mechanism (2) includes a hot metal detector (204); The heat detection mechanism (2) is connected to an operation box (14) via a data transmission serial port. A PLC central control system is provided inside the operation box (14). The PLC central control system can be connected to an external computer to realize control and display using WINCC configuration software. The operation box (14) is electrically connected to a rolling mill transmission cabinet (5) and a flying shear transmission cabinet (13). The number of the rolling mill bodies (4) is set to 7, and the main logical steps of the operation of the PLC central control system include: S1. Control the external mechanical grabber to roll the wire billet head and tail into the heating furnace; S2. The steel billet generated by heating in the heating furnace is sent to the furnace discharge roller table (3) through the action of the walking beam. At this time, the steel billet is heat-tested by the heat detection mechanism (2), and the heat signal information obtained by the heat detection is used to control the connected rolling mill body (4) to perform a delay operation. The S2 step is specifically as follows: a1. A heat signal is obtained by temperature measurement by a hot metal detector (204) on the furnace roller (3). When the heat signal obtained by the temperature measurement by the hot metal detector (204) disappears after the billet passes through, the speed of the connected rolling mill is controlled to decrease by 30%, and then the connected rolling mill body (4) is controlled to achieve a delayed operation of speed reduction; a2. When the next billet moves to the connected rolling mill body (4), the delay time can be controlled to be reached, at which time the speed of the rolling mill body (4) is restored to its original speed; S3. Waiting to calculate the time interval between the last time the walking beam controlled the steel billet to be fed onto the furnace roller (3) and the next time the walking beam controlled the steel billet to be fed onto the furnace roller (3), and at the same time calculating the time interval between each steel billet being controlled to reach the connecting rolling mill body (4) and the tail of the previous steel billet leaving the connecting rolling mill, and counting whether the time interval is less than four seconds. If the time interval is less than four seconds, the flying shear head of the flying shear machine (9) is controlled to move, so that the flying shear length of the steel billet is increased by 300 mm, and when the steel billet reaches the flying shear operating table (8), the flying shear machine (9) is controlled to shear the steel billet.

2. The automatic adjustment system for the head-to-tail rolling interval of a wire billet according to claim 1 is characterized in that: The thermal detection mechanism (2) further comprises a connecting bracket (201), a thermal detection display (202), and a thermal detection processor (203); the connecting bracket (201) is configured as a door frame-type structure, and a hot metal detector (204) is provided at the middle of the inner top side of the connecting bracket (201); the outer top side of the connecting bracket (201) is fixedly connected to the thermal detection processor (203); a thermal detection display (202) is provided at one side of the thermal detection processor (203); and the thermal detection display (202) is electrically connected to the hot metal detector (204) and the thermal detection display (202).

3. The automatic adjustment system for the head-to-tail rolling interval of a wire billet according to claim 1 is characterized in that: The rolling mill body (4) comprises a rolling mill operating table (401), a movable roller (402), an inverted L-shaped connecting frame (403), a hydraulic cylinder (404), a connecting pressure rod (405), a lower pressure plate (406), a rolling mill roller (407), a reduction motor (408), a synchronous motor (409) and an auxiliary telescopic rod (410). The rolling mill operating table (401) is provided with movable rollers (402) on both sides of the upper end. The rolling mill operating table (401) is fixedly connected to the reduction motor (408) on both sides of the upper end of the side close to the rolling mill transmission cabinet (5), and the driving end of the reduction motor (408) is fixedly connected to the movable roller (402) via a rotating shaft passing through the rolling mill operating table (401). The rolling mill operating table (401) is fixedly connected to the inverted L-shaped connecting frame (403) on the side away from the rolling mill transmission cabinet (5), and the horizontal plate of the inverted L-shaped connecting frame (403) faces the rolling mill transmission cabinet (5). A hydraulic cylinder (404) is fixedly connected to the middle of the top of the transverse plate of the inverted L-shaped connecting frame (403); a connecting pressure rod (405) is fixedly connected to the lower driving end of the hydraulic cylinder (404); and the middle of the connecting pressure rod (405) passes through the transverse plate of the inverted L-shaped connecting frame (403); a lower pressing plate (406) is fixedly connected to the bottom end of the connecting pressure rod (405); auxiliary telescopic rods (410) are fixedly connected to the four corners of the upper surface of the lower pressing plate (406); and the upper ends of the auxiliary telescopic rods (410) are fixedly connected to the lower surface of the transverse plate of the inverted L-shaped connecting frame (403); rolling rollers (407) are arranged on both sides of the bottom end of the lower pressing plate (406); synchronous motors (409) are fixedly connected to both sides of the lower end of the lower pressing plate (406) close to the rolling mill transmission cabinet (5); and the driving ends of the synchronous motors (409) are fixedly connected to the rolling rollers (407) via a rotating shaft passing through the lower pressing plate (406).

4. The automatic adjustment system for the head-to-tail rolling interval of a wire billet according to claim 3 is characterized in that: The synchronous motors (409) are fixedly connected to each other via an encoder (6) and a rolling mill transmission cabinet (5); the reduction motors (408) are fixedly connected to the rolling mill transmission cabinet (5); and the rolling mill transmission cabinet (5) is electrically connected to the encoder (6) and the reduction motor (408) via the synchronous motor (409); the flying shear movable end of the top of the flying shear (9) is fixedly connected to the driving end of the servo motor (12); the flying shear operating table (8) and the flying shear transmission cabinet (13) are fixedly connected to each other; and the flying shear transmission cabinet (13) is electrically connected to the servo motor (12) via an internal coding structure.

5. The automatic adjustment system for the head-to-tail rolling interval of a wire billet according to claim 1 is characterized in that: The operation box (14), the rolling mill drive cabinet (5) and the flying shear drive cabinet (13) are fixedly connected to each other via a wiring harness tube (7), a plurality of harness structures are arranged inside the wiring harness tube (7), and a plurality of data lines for controlling the operation box (14), the rolling mill drive cabinet (5) and the flying shear drive cabinet (13) to be connected to each other are arranged inside the wiring harness tube (7).

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