A method and device for calibrating the position of a high-speed switch in a rolling mill

Abstract

The application discloses a position calibration method and device for a high-speed line switch of a rolling mill, and the position calibration method and device are characterized in that: before the high-speed line of the rolling mill starts continuous production, a calibration hole is opened on a calibration template by a laser calibration device installed on the switch, and the pre-calibration of the switch is completed; when the switch deviates from the preset position and causes a fault, the position of the switch can be quickly corrected by cooperation of the laser calibration device and the calibration template, the position calibration of the switch is completed, the production stop time of the high-speed line of the rolling mill is reduced, and the application has good applicability and can be applied to various flying shears and switches; the laser calibration device can be simply centered and installed by using a multi-jaw chuck, the calibration template can adjust its size by a base and a main plate, and a fixing clamp of the calibration template can also adjust its size, so that the calibration template can be installed on various flying shears.

Description

Technical Field

[0001] This invention relates to the field of bar shear processing technology, specifically to a method and device for calibrating the position of a high-speed wire rod switch in a rolling mill. Background Technology

[0002] In the high-speed wire rod mill used for hot steel rolling of bars and wire rods, switchers and flying shears are essential equipment. The main functions of flying shears include cutting the head and tail of the rolled piece, cutting to length, cutting to multiple length, and crushing. Switchers are usually arranged in front of flying shears. Their function is to control the flow direction and speed of the rolled piece, repeatedly moving the rolled piece from the shearing position to the passing position to cooperate with the flying shear in processing the rolled piece.

[0003] The switch has four positions during the flying shearing process: break-off position, head cutting position, partition position, and passage position. The break-off position is one of the basic working positions of the switch, which is mainly responsible for shearing the rolled workpiece into segments of specified size. In this position, the switch blades are in close contact with the rolled workpiece, and the rolled workpiece is cut into small segments through the shearing action of the blades.

[0004] The shearing position is another working position of the switch, and its main function is to shear the rolled workpiece. In this position, the switch blades shear the rolled workpiece to ensure that the size and shape of the rolled workpiece meet the requirements.

[0005] The partition position is an auxiliary position of the switch. Its main function is to separate and position the cut rolled pieces through the partition located in the scrap chute behind the flying shear. At this position, the partition separates the cut rolled pieces to prevent them from colliding and sticking together.

[0006] The pass position is the working position of the switch after completing the shearing and separation operations. At this position, the switch has completed the shearing and separation operations of the rolled piece, ensuring that the rolled piece can pass smoothly through the switch and enter the subsequent processing stage.

[0007] Because the switch operates frequently during the rolling process of high-speed wire rod and high-speed bar, the hot rolled workpiece passes through it, and the heat transfer causes the transmission mechanism to deform due to heat. This causes the switch to deviate from the preset position during repeated movements, thus the switch often becomes a source of failure. The main manifestations are that the switch is not flexible in operation, jamming and stagnation, and inaccurate start and stop positions. This results in the workpiece being missed, not cut, cut multiple times, or not broken, or even steel piling up. This increases the accident rate and downtime rate of the production line, and seriously restricts the improvement of production line operation rate and product quality.

[0008] After a switch malfunctions, it is necessary to re-examine the actual position of the switch during its movement, check whether each position of the switch during its movement is accurate, and readjust the position of the switch to avoid causing another accident. However, it is difficult to quickly determine whether each position of the switch is accurate during shearing. Existing technology requires a long shutdown for troubleshooting when checking the position of the switch, which seriously affects production efficiency. Summary of the Invention

[0009] The purpose of this invention is to address the problems existing in the prior art by providing a method and device for calibrating the position of a high-speed wire rod switch in a rolling mill.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0011] A method for calibrating the position of a high-speed wire rod switch in a rolling mill includes the following steps:

[0012] Install the laser calibration equipment at the exit of the switch and install the calibration template on the blade of the flying shear.

[0013] Preset rotation angles when the switch is in the break position, cut-off position, partition position, and through position;

[0014] Start the laser calibration device so that the laser is projected onto the calibration template;

[0015] The switch is controlled to rotate sequentially to the break position, the head-cutting position, the partition position, and the through position. Each time it rotates, a calibration hole is opened on the calibration template according to the light spot projected by the laser onto the calibration template.

[0016] After completing four rotations, the laser calibration equipment and calibration template are removed, thus completing the pre-calibration of the switch.

[0017] When the switch malfunctions due to deviation from the preset position, the laser calibration device and the calibration template are reinstalled.

[0018] The switch is controlled to rotate sequentially to the break position, the cut-off position, the partition position, and the through position. Each time it rotates, the switch is adjusted so that the laser can pass through the calibration hole, thus completing the position calibration of the switch.

[0019] Before continuous production begins at the high-speed wire rod mill, this invention pre-calibrates the switch by opening calibration holes in the calibration template using a laser calibration device installed on the switch. When the switch malfunctions due to deviation from the preset position, the laser calibration device and the calibration template can work together to quickly correct the position of the switch, completing the position calibration of the switch and reducing the downtime of the high-speed wire rod mill.

[0020] Preferably, the rotation angle of the switch is preset according to the relative positions between the flying shear, the switch and the waste chute at the break position, the head cutting position, the partition position and the through position.

[0021] Preferably, the calibration holes include fracture calibration holes, cut-off head calibration holes, partition calibration holes, and through-hole calibration holes.

[0022] Preferably, when opening the calibration holes, the switch opens the fracture position calibration hole when rotating to the break position, the switch opens the cut-off position calibration hole when rotating to the cut-off position, the switch opens the partition position calibration hole when rotating to the partition position, and the switch opens the through position calibration hole when rotating to the through position.

[0023] During the process of presetting the movement position of the switch, the laser calibration device opens calibration holes on the calibration template corresponding to each movement position. Since the switch starts from the break position and gradually moves to the cut-off position, the partition position and the through position, and then returns to the break position in the reverse order, the position of the switch and each calibration hole can be clearly matched during the correction of the switch, and they will not be confused with each other.

[0024] Preferably, the calibration template uses the vertical surface of the flying shear and the horizontal plane where the shear blade is installed as the installation reference surface.

[0025] Preferably, the laser calibration device includes a laser emitter and a multi-jaw chuck, the tail of the laser emitter is disposed on the multi-jaw chuck, and the laser emitter is located on the central axis of the multi-jaw chuck.

[0026] Preferably, the laser emitter is mounted at the exit of the switch via the multi-jaw chuck.

[0027] The laser calibration device utilizes the multi-jaw chuck to easily achieve the centering and installation of the laser calibration device, which is applicable to various types of switches. During the installation process, it ensures that the laser emitter is accurately positioned on the central axis of the switch, avoiding deviations in the installation of the laser emitter that could affect the position calibration of the switch.

[0028] Preferably, the system further includes the calibration template, which includes a base, a main board, and a fixing fixture. The main board includes a telescopic section and a calibration section. The telescopic section is slidably connected to the base, and the fixing fixture is slidably connected to the calibration section. The calibration template contacts the vertical surface of the flying shear through the base.

[0029] Preferably, the calibration section has an I-shaped cross-section, and the fixing fixture includes a C-shaped fixture, a fixing plate, and a sliding clamping plate. The C-shaped fixture holds the calibration section, and the back plate of the C-shaped fixture is disposed against the calibration section. The fixing plate is fixed to the back plate, and the sliding clamping plate is slidably connected to the back plate. The fixing plate and the sliding clamping plate are parallel to each other, and the fixing plate and the sliding clamping plate are connected by bolts.

[0030] Preferably, the fixing clamp adjusts the distance between the fixing plate and the sliding clamping plate by bolts, so as to hold the shear blade by the fixing plate and the sliding clamping plate.

[0031] The calibration template can adjust its size via the base and the main board, and the fixing clamp of the calibration template can also adjust its size, so that the calibration template can be installed on various types of flying shears.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] (1) Before the high-speed wire rod of the rolling mill starts continuous production, the present invention opens calibration holes in the calibration template by using a laser calibration device installed on the switch to complete the pre-calibration of the switch. When the switch malfunctions due to deviation from the preset position, the laser calibration device and the calibration template can work together to quickly correct the position of the switch and complete the position calibration of the switch, thereby reducing the downtime of the high-speed wire rod of the rolling mill.

[0034] (2) The present invention has good applicability and can be applied to various flying shears and switches. The laser calibration equipment can easily realize the centering and installation of the laser calibration equipment by using a multi-jaw chuck. The calibration template can adjust its own size through the base and the main board. The fixing clamp of the calibration template can also adjust its own size, so that the calibration template can be installed on various flying shears. Attached Figure Description

[0035] Figure 1 This is a flowchart of the position calibration method in this invention;

[0036] Figure 2 This is a schematic diagram of the switch in the present invention;

[0037] Figure 3 This is a schematic diagram of the disc-type flying shear in this invention;

[0038] Figure 4 This is a schematic diagram of the switch and disc-type flying shear in the present invention during position calibration;

[0039] Figure 5 This is a schematic diagram of the calibration template in this invention;

[0040] Figure 6This is a schematic diagram of the structure of the switch, disc-type flying shear and waste chute when the switch is in the broken position of the present invention;

[0041] Figure 7 This is a schematic diagram of the structure of the switch, disc-type flying shear and waste chute when the switch is in the cut-off position of the present invention;

[0042] Figure 8 This is a schematic diagram of the structure of the switch, disc-type flying shear and waste chute when the switch is in the partition position.

[0043] Figure 9 This is a schematic diagram of the structure of the switch, disc-type flying shear and waste chute of the present invention when the switch is in the pass position and the position is calibrated.

[0044] In the diagram: 1. Disc-type flying shear; 101. Disc blade; 102. Shear blade; 2. Switch; 201. Rotary mechanism; 202. Swing guide; 203. Support seat; 204. Drive structure; 3. Scrap trough; 301. Scrap channel; 302. Rolled piece channel; 303. Partition plate; 4. Laser calibration equipment; 5. Calibration template; 501. Base; 502. Main board; 503. Fixture; 504. Calibration hole; 505. Sliding clamp. Detailed Implementation

[0045] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] like Figures 1-9 As shown, the specific scheme of the embodiment is as follows: In the production line for high-speed wire rod and high-speed bar rolling, the No. 3 flying shear is located in front of the finishing mill and is used for cutting the head and tail of the rolled piece, sampling the head and tail, and protecting the front of the finishing mill from breakage. According to the requirements of modern high-speed rolling process, the No. 3 flying shear is located in front of the modular finishing mill and is used for cutting the head and tail of the rolled piece, sampling the head and tail, and protecting the front of the finishing mill from breakage. Based on the direction of the rolled piece movement, a switch 2 is set in front of the No. 3 flying shear and a scrap trough 3 is set behind the No. 3 flying shear.

[0048] The No. 3 flying shear adopts the common disc flying shear 1. The structure of the disc flying shear 1 mainly includes a shearing mechanism, a frame, and a transmission system. The shearing mechanism consists of a pair of disc blades 101 rotating in opposite directions. The frame is the main structure of the flying shear, and the shearing mechanism is set on the frame. The transmission system includes a motor, gears, worm gears, worms, etc., which are used to transmit power to the main shaft of the flying shear so that it can achieve high-speed rotation.

[0049] The main structure of the switch 2 includes a base, a slewing mechanism 201, a swing guide tube 202, a support seat 203, and a drive structure 204. The slewing mechanism 201 and the support seat 203 are both mounted on the base. The tail end of the swing guide tube 202 is rotatably connected to the slewing mechanism 201, and the head end of the swing guide tube 202 is slidably connected to the support seat 203. The drive structure 204 includes a motor and a push rod. The motor is connected to the head end of the swing guide tube 202 through the push rod. When the switch 2 rotates, the motor pushes the swing guide tube 202 through the push rod, and the swing guide tube 202 rotates around the central axis of the slewing mechanism 201.

[0050] The scrap trough 3 includes a parallel scrap channel 301 and a workpiece channel 302. The scrap cut off by the disc flying shear 1 will leave through the scrap channel 301, while the workpiece processed by the disc flying shear 1 will leave through the workpiece channel 302 and enter the finishing mill after the scrap trough 3.

[0051] A position calibration device for a high-speed wire rod switch 2 in a rolling mill includes a laser calibration device 4 and a calibration template 5. The laser calibration device 4 includes a laser emitter and a multi-jaw chuck. The tail of the laser emitter is set on the multi-jaw chuck, and the laser emitter is located on the central axis of the multi-jaw chuck. The laser emitter is installed at the exit of the switch 2 through the multi-jaw chuck. The diameter of the light source of the laser emitter is between 1 mm and 4 mm.

[0052] The calibration template 5 includes a base 501, a main board 502, and a fixing fixture 503. The main board 502 includes a telescopic section and a calibration section. The base 501 includes a positioning base plate and a connecting slide plate. The positioning base plate and the connecting slide plate are perpendicularly connected to each other. The connecting slide plate is provided with bolts. The telescopic section is slidably connected to the connecting slide plate. The connecting slide plate is tightened against the main board 502 by bolts, thereby fixing the main board 502.

[0053] The calibration template 5 is placed against the vertical surface of the flying shear frame via the positioning base plate. The calibration holes 504 on the calibration template 5 are arranged in a row on the calibration section of the main board 502. The diameter of the calibration holes 504 is 4mm to 6mm.

[0054] The calibration hole 504 includes a fracture calibration hole, a cut-off head calibration hole, a partition calibration hole, and a through calibration hole.

[0055] The fixing clamp 503 is slidably connected to the calibration section. The calibration section has an I-shaped cross-section. The fixing clamp 503 includes a C-shaped clamp, a fixing plate, and a sliding clamp 505. The C-shaped clamp holds the calibration section. Bolts are provided on the upper and lower sides of the C-shaped clamp. The C-shaped clamp is tightened against the upper and lower sides of the calibration section by the bolts, thereby fixing the fixing clamp 503 to the main plate 502. The back plate of the C-shaped clamp is set against the calibration section. The fixing plate is fixed on the back plate. The sliding clamp 505 is slidably connected to the back plate. The fixing plate and the sliding clamp 505 are parallel to each other and are connected by bolts.

[0056] The fixing clamp 503 adjusts the distance between the fixing plate and the sliding clamp 505 by bolts so as to hold the shear blade 102 by the fixing plate and the sliding clamp 505.

[0057] A method for calibrating the position of a high-speed wire rod switch 2 in a rolling mill includes the following steps:

[0058] S1. Before starting the steel rolling production line, install the laser calibration equipment 4 at the outlet of the switch 2 using a multi-jaw chuck;

[0059] S2. Close the cutting blades 102 on the upper and lower disc blades 101 of the disc-type flying shear 1, and then install the calibration template 5. During the installation process, the calibration template 5 uses the vertical surface of the flying shear and the horizontal plane of the cutting blades 102 as the installation reference surface, so that the positioning base plate of the calibration template 5 is close to the vertical surface of the flying shear frame, and the main plate 502 of the calibration template 5 is perpendicular to the vertical surface of the flying shear frame.

[0060] S3. The fixing clamp 503 clamps the cutting blades 102 on the upper and lower disc blades 101 in the disc flying shear 1, and the back plate of the fixing clamp 503 is close to the plane of the cutting blade 102, so that the main plate 502 of the calibration template 5 is parallel to the plane of the cutting blade 102.

[0061] S4. Based on the relative positions between the flying shear, the switch 2, and the waste trough 3, the rotation angles of the switch 2 when it is in the breaking position, the head-cutting position, the partition position, and the through position are preset using the laser emitted by the laser calibration device 4. When the switch 2 is in the breaking position, the laser will irradiate the center position between the two shear blades 102 on the upper and lower disc cutters 101. When the switch 2 is in the head-cutting position, the laser will irradiate the waste channel 301 of the waste trough 3. When the switch 2 is in the partition position, the laser will irradiate the partition 303 of the waste trough 3. When the switch 2 is in the through position, the laser will irradiate the rolling passage 302 of the waste trough 3.

[0062] S5. Start the laser calibration device 4 so that the laser is projected onto the calibration template 5 and a light spot is projected onto the calibration template 5;

[0063] S6. Control the switch 2 to rotate to the break position, and open the break position calibration hole on the calibration template 5 according to the laser spot projected on the calibration template 5.

[0064] S7. Control the switch 2 to rotate to the cut-off position, and open the cut-off position calibration hole on the calibration template 5 according to the laser spot projected on the calibration template 5.

[0065] S8. Control the switch 2 to rotate to the partition position, and open the partition position calibration hole on the calibration template 5 according to the light spot projected by the laser on the calibration template 5.

[0066] S9. Control the switch 2 to rotate to the pass position, and open the pass position calibration hole on the calibration template 5 according to the light spot projected by the laser on the calibration template 5.

[0067] S10. After completing four rotations, remove the laser calibration equipment 4 and calibration template 5 to complete the pre-calibration of switch 2.

[0068] S11. When the switch 2 malfunctions due to deviation from the preset position, the laser calibration device 4 and calibration template 5 are reinstalled.

[0069] S12. When installing the calibration template 5, repeat steps S2 and S3, and adjust the relative positions of the fixing fixture 503 and the main board 502 so that the fracture position calibration hole coincides with the center position between the two shear blades 102 on the upper and lower disc cutters 101 in the horizontal direction.

[0070] S13. Control the switch 2 to rotate to the broken position, adjust the switch 2 so that the laser can pass through the broken position calibration hole;

[0071] S14. Control the switch 2 to rotate to the cut-off position, and adjust the switch 2 so that the laser can pass through the cut-off position calibration hole;

[0072] S15. Control the switch 2 to rotate to the partition position, adjust the switch 2 so that the laser can pass through the calibration hole of the partition position;

[0073] S16. Control the switch 2 to rotate to the pass position, adjust the switch 2 so that the laser can pass through the pass position calibration hole;

[0074] S17. After completing four rotations, remove the laser calibration equipment 4 and calibration template 5 to complete the position calibration of switch 2.

[0075] During the process of setting the movement position of switch 2, the laser calibration device 4 opens calibration holes 504 on the calibration template 5 corresponding to each movement position. Since switch 2 starts from the break position and gradually moves to the head-cutting position, the partition position and the through position, and then returns to the break position in the opposite order, the position of switch 2 and each calibration hole 504 can be clearly matched one by one during the correction of switch 2, and they will not be confused with each other.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for calibrating the position of a high-speed wire rod switch in a rolling mill, characterized in that, Includes the following steps: Install the laser calibration equipment at the exit of the switch and install the calibration template on the blade of the flying shear. Preset rotation angles when the switch is in the break position, cut-off position, partition position, and through position; Start the laser calibration device so that the laser is projected onto the calibration template; The switch is controlled to rotate sequentially to the break position, the head-cutting position, the partition position, and the through position. Each time it rotates, a calibration hole is opened on the calibration template according to the light spot projected by the laser onto the calibration template. After completing four rotations, the laser calibration equipment and calibration template are removed, thus completing the pre-calibration of the switch. When the switch malfunctions due to deviation from the preset position, the laser calibration device and the calibration template are reinstalled. The switch is controlled to rotate sequentially to the break position, the cut-off position, the partition position, and the through position. Each time it rotates, the switch is adjusted so that the laser can pass through the calibration hole, thus completing the position calibration of the switch. The calibration template includes a base, a main board, and a fixing fixture. The main board includes a telescopic section and a calibration section. The telescopic section is slidably connected to the base, and the fixing fixture is slidably connected to the calibration section. The calibration template contacts the vertical surface of the flying shear through the base.

2. The method for calibrating the position of a high-speed wire rod switch in a rolling mill according to claim 1, characterized in that, Based on the relative positions of the flying shear, the switch, and the waste chute, the rotation angle of the switch is preset at the break-off position, the head-cutting position, the partition position, and the through position.

3. The method for calibrating the position of a high-speed wire rod switch in a rolling mill according to claim 1, characterized in that, The calibration holes include fracture location calibration holes, cut-off location calibration holes, partition location calibration holes, and through location calibration holes.

4. The method for calibrating the position of a high-speed wire rod switch in a rolling mill according to claim 3, characterized in that, When the calibration hole is opened, the switch opens the calibration hole when it rotates to the break position, the switch opens the calibration hole when it rotates to the cut-off position, the switch opens the calibration hole when it rotates to the partition position, and the switch opens the calibration hole when it rotates to the through position.

5. The method for calibrating the position of a high-speed wire rod switch in a rolling mill according to claim 1, characterized in that, The calibration template uses the vertical surface of the flying shear and the horizontal plane where the shear blade is installed as the installation reference surface.

6. The method for calibrating the position of a high-speed wire rod switch in a rolling mill according to claim 1, characterized in that, The laser calibration device includes a laser emitter and a multi-jaw chuck, with the tail of the laser emitter mounted on the multi-jaw chuck and the laser emitter located on the central axis of the multi-jaw chuck.

7. The method for calibrating the position of a high-speed wire rod switch in a rolling mill according to claim 6, characterized in that, The laser emitter is mounted at the exit of the switch via the multi-jaw chuck.

8. The method for calibrating the position of a high-speed wire rod switch in a rolling mill according to claim 1, characterized in that, The calibration section has an I-shaped cross-section. The fixing fixture includes a C-shaped fixture, a fixing plate, and a sliding clamp. The C-shaped fixture holds the calibration section. The back plate of the C-shaped fixture is set against the calibration section. The fixing plate is fixed to the back plate. The sliding clamp is slidably connected to the back plate. The fixing plate and the sliding clamp are parallel to each other and are connected by bolts.

9. The method for calibrating the position of a high-speed wire rod switch in a rolling mill according to claim 8, characterized in that, The fixing clamp adjusts the distance between the fixing plate and the sliding clamp plate by bolts, so as to hold the shear blade by the fixing plate and the sliding clamp plate.

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