Hot-rolled narrow strip steel head three-section type righting traction device and traction method

Abstract

The invention belongs to the technical field of hot-rolled narrow strip steel production equipment, and particularly relates to a hot-rolled narrow strip steel strip head three-section type righting traction device and method. A hot rolling narrow strip steel head three-section type centralizing traction device comprises a head end guiding mechanism, a middle centralizing mechanism and a tail end clamping and conveying mechanism which are sequentially connected, the head end guiding mechanism comprises a water cooler and a guider, a first conical transition section is arranged on the outer side of the water cooler, and a snake vibrator is connected to the small opening end of the first conical transition section; the middle centralizing mechanism comprises a centralizing vehicle body and a centralizer, the tail end clamping and conveying mechanism comprises a clamping and conveying device, a second conical transition section is arranged on the outer side of the clamping and conveying device, and a coiling machine is arranged on the outer side of the conical end of the second conical transition section. By means of the head end guiding mechanism, the middle righting mechanism and the tail end clamping and conveying mechanism, centering, righting and clamping and conveying of the hot-rolled narrow strip steel in the flat chain conveying process are achieved, deformation of the narrow strip steel strip head is controlled in the whole process, the equipment reliability is improved, and automatic strip head traction of the hot-rolled narrow strip steel is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of hot-rolled narrow strip steel production equipment, and in particular relates to a three-stage straightening and traction device and a traction method for a hot-rolled narrow strip steel strip head. Background Art

[0002] China is the world's largest steel producer. In recent years, many steel companies have carried out a lot of technological updates and equipment renovations, and have done a lot of work in improving the automation level and production capacity of rolling mills, and have achieved remarkable results. However, the technological transformation and equipment updates of some enterprises have not kept up with the pace of development of the steel industry, which is particularly evident in the obsolete equipment and low automation level of the subsequent finishing process, which affects the improvement of rolling production efficiency and economic benefits. Among them, the production of hot-rolled narrow strip steel is a typical example. Hot-rolled narrow strip steel is one of the important steel products and is widely used in many fields such as home appliances, hardware, and building materials. According to changes in market demand, China currently has about 60 hot-rolled narrow strip steel production lines, with an annual output of 60 to 80 million tons of hot-rolled narrow strip steel. In the current production of hot-rolled narrow strip steel, most production lines are continuous rolling, but the post-rolling production operations are still manually performed by humans next to the high-temperature strip steel at 600-700°C (lead traction, steel coil bundling, number spraying, etc.). Not only is the labor intensity of the workers high, the high temperature environment is harmful to the health of the workers, there are safety hazards, and the production efficiency is low, which affects the overall operation and management of the rolling line and the improvement of the economic benefits of the production enterprise.

[0003] At present, the hot-rolled steel strips manufactured in the metallurgical industry need to be pulled to the coiler to be packaged into steel coils. In the existing hot-rolled steel strip production, the horizontal steel strip after hot rolling is twisted into a vertical state after passing through the twisting guide plate and sent to the pinch roller, and then swung left and right by the serpentine oscillator, and then placed vertically on the flat chain in an irregular S shape. The head of the steel strip is subject to the combined effect of the swinging inertia force, its own gravity, and the friction resistance of the flat chain and the side wall. Different postures such as head sticking to the wall, head and body sticking, head bending back, and head lying obliquely may appear at different positions. Especially for hot-rolled thin and narrow strip steel, it is more serious, and even curled and fell on the flat chain, so that the steel strip cannot automatically enter the entrance of the winding roller, affecting the automatic winding of the steel strip. In most domestic production lines, the head of the hot-rolled steel strip cannot automatically penetrate the roller behind, but is manually adjusted by long-handled clamps to the position of the head of the steel strip, and the clamps are used to clamp the steel strip when feeding it into the roller to send the head of the steel strip into the roller. This production method often causes the flat chain to stop due to various reasons. Production can only be resumed when the strip head is fed into the coiler, resulting in low work efficiency. In addition, this operation is dangerous and workers are very likely to be burned.

[0004] Most of the existing automatic grabbing technologies use a manipulator grabbing method. The difference between each technology lies in the different structures and transmission methods of the mechanical claws for grabbing steel strips. There are two transmission methods: manipulator transmission and coordinate transmission. For example, the utility model patent CN202220586686.7 provides a manipulator grabbing device for hot-rolled steel strips. The device realizes the grabbing of steel strips by driving one claw on each side of the manipulator, and realizes the operation of robot grabbing steel strips. The utility model patent CN218532334 U provides a manipulator grabbing device for hot-rolled steel strips. The device drives three evenly distributed grabbing claws by a manipulator. The utility model patent CN 211100774 U provides a new type of automated strip leading equipment, which realizes the grabbing of the head of the steel strip through coordinate transmission. In the actual process of grabbing the head of the steel strip, since the steel strip is moving and the posture is an irregular three-dimensional S-shaped shape in space, there are phenomena such as the head sticking to the wall, the head and body sticking together, the head bending back, the head lying obliquely, and the curling and lodging, which makes it difficult to achieve accurate "grabbing". The second is the impact of the strip temperature on the traction equipment. The lead traction component equipment is located in the center of the flat chain, and the rest of the transmission mechanism is also in the high-temperature radiation area above the strip, which mainly affects the transmission mechanism accuracy of the mechanical part, the rigidity and wear resistance of the material, the equipment lubrication, the measurement and control components, and the selection of the power source. Therefore, the actual producer cannot achieve the "straightening" and "traction" functions with the above technologies.

[0005] Based on the characteristics of existing technologies, the key point lies in "end control", that is, in the actual process of grabbing the strip head, the strip head of the steel strip that has been bent, lying, moving, and irregular three-dimensional S-shaped is grabbed in front of the pinch roller at the entrance of the flat chain end coiler. Therefore, the robot needs to cooperate with three-dimensional recognition, tracking, grabbing, straightening, guiding and other operations, which is difficult to achieve due to the different shapes of the strip heads, and has not been promoted and applied so far. Summary of the invention

[0006] In view of the above problems, the purpose of the present invention is to provide a three-stage straightening and traction device and traction method for the head of a hot-rolled narrow strip steel. By means of a head-end guiding mechanism, an intermediate straightening mechanism and an end clamping mechanism connected in sequence, the centering, straightening and clamping of the hot-rolled narrow strip steel in the flat chain conveying process can be achieved, and the deformation of the narrow strip steel head can be controlled throughout the whole process, thereby improving the reliability of the equipment and realizing automatic head traction of the hot-rolled narrow strip steel.

[0007] The technical solution of the present invention is: a three-stage straightening and traction device for the head of a hot-rolled narrow strip steel strip, comprising a head end guiding mechanism, an intermediate straightening mechanism and an end clamping mechanism connected in sequence, the head end guiding mechanism comprising a water cooler and a guide, a first conical transition section is provided on the outside of the water cooler, a snake vibrator is connected to the small mouth end of the first conical transition section, the intermediate straightening mechanism comprises a straightening car body, a straightening device is provided in the middle of the straightening car body, the end clamping mechanism comprises a clamping device, a second conical transition section is provided on the outside of the clamping device, a coiler is provided on the outside of the conical end of the second conical transition section, a flat chain is provided between the head end guiding mechanism, the intermediate straightening mechanism and the end clamping mechanism, and the flat chain is used to drive the hot-rolled narrow strip steel to move.

[0008] A first belt head detector is provided at the inlet end of the snake vibrator, second belt head detectors are provided on both sides of the centralizer, and a third belt head detector is provided on the clamping device.

[0009] The guide, the snake vibrator, the centralizer and the clamp are located on the same axis.

[0010] A three-stage straightening and traction method for a hot-rolled narrow strip steel strip head, using the three-stage straightening and traction device for a hot-rolled narrow strip steel strip head as described above, comprises the following steps: S1: After rolling, the head of the hot-rolled narrow strip steel passes through the vibrator and is transferred from the first conical transition section to the flat chain via the guide; S2: The speed of the leader of the hot-rolled narrow strip on the flat chain decreases and it is relatively stationary with respect to the flat chain. The middle section of the hot-rolled narrow strip begins to accumulate on the flat chain in a serpentine shape. The leader of the hot-rolled narrow strip contacts the second leader detector of the middle straightening mechanism. The second leader detector sends a signal. After the straightening vehicle accelerates to a speed equal to or slightly higher than the speed of the flat chain, the straightening device clamps the leader of the hot-rolled narrow strip, clamps and drags it forward for a certain distance, then releases the leader. The straightening vehicle stops and returns to the working starting point in the opposite direction. At this time, the entire hot-rolled narrow strip is distributed on the flat chain in a serpentine shape, and the flat chain runs toward the coiler at the set speed. S3: When the head of the hot-rolled narrow strip reaches the third head detector installed in front of the coiler, the detection mechanism sends a signal. After the head of the hot-rolled narrow strip passes through the pinch roller of the second conical transition section, it enters the coiler core shaft. The coiler starts and rotates at high speed to coil the strip to the tail to form a strip coil.

[0011] In step S1, the head of the hot-rolled narrow strip steel enters the first conical transition section through the vibrator, and the water cooler automatically selects the cooling water volume and water flow time according to the model of the hot-rolled narrow strip steel. The cooling water in the water cooling hood of the water cooler is sprayed toward the center line on both sides of the center line of the flat chain.

[0012] The technical effects of the present invention are: 1. The present invention realizes the centering, straightening and clamping of the hot-rolled narrow strip steel in the flat chain conveying process through the sequentially connected head-end guiding mechanism, the middle straightening mechanism and the end clamping mechanism, and controls the deformation of the narrow strip steel head throughout the whole process, thereby improving the reliability of the equipment and realizing automatic leading traction of the hot-rolled narrow strip steel; 2. When the present invention is used, the hot-rolled narrow strip steel passes through the oscillator outlet at a high temperature and high speed. First, the temperature of the narrow strip steel head is reduced by the water spray cooling method of the head-end straightening mechanism to increase the rigidity of the narrow strip steel head. Then, under the action of the guide of the head-end straightening mechanism, the head maintains the correct posture and position from the initial stage of entering the flat chain, thereby avoiding the narrow strip steel head from being red hot at high temperature. in a state of high speed impacting the chain plate or side wall of the flat chain, thereby greatly reducing the probability of abnormal deformation of the narrow strip steel head; 3. After the narrow strip steel strip head of the present invention enters the flat chain under the forward advancement of the subsequent strip steel, the speed of the narrow strip steel strip head decreases and becomes relatively stationary with the flat chain. At this time, through the combined action of the straightening, clamping and traction of the reciprocating follower intermediate straightener in the middle of the flat chain, the strip head of a certain length at the end of the narrow strip steel is accurately placed near the symmetrical center line of the flat chain, and a moderate curvature is maintained to avoid lodging; 4. The end of the flat chain of the present invention enters between the clamping rollers of the coiler, and the clamping device of the end clamping mechanism clamps and centers the narrow strip steel strip head in a moving state and realizes auxiliary traction and feeding.

[0013] The following is a further description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a schematic structural diagram of a three-stage straightening and traction device for a hot-rolled narrow strip steel strip head according to an embodiment of the present invention.

[0015] Figure markings: 1-head end guiding mechanism, 2-middle straightening mechanism, 3-end clamping mechanism, 4-hot-rolled narrow strip, 5-flat chain, 6-coiler, 101-water cooler, 102-guide, 103-first belt head detector, 104-snake vibrator, 105-first conical transition section, 201-straightening car body, 202-straightening device, 203-second belt head detector, 301-clamping device, 302-third belt head detector, 303-second conical transition section. DETAILED DESCRIPTION Example 1

[0016] like Figure 1As shown, a three-stage straightening and traction device for the head of a hot-rolled narrow strip steel strip comprises a head-end guiding mechanism 1, an intermediate straightening mechanism 2 and an end clamping and conveying mechanism 3 which are connected in sequence, wherein the head-end guiding mechanism 1 comprises a water cooler 101 and a guide 102, a first conical transition section 105 is arranged on the outer side of the water cooler 101, a snake vibrator 104 is connected to the small end of the first conical transition section 105, the intermediate straightening mechanism 2 comprises a straightening car body 201, a straightening device 202 is arranged in the middle of the straightening car body 201, the end clamping and conveying mechanism 3 comprises a clamping and conveying device 301, a second conical transition section 303 is arranged on the outer side of the clamping and conveying device 301, a coiler 6 is arranged on the outer side of the conical end of the second conical transition section 303, a flat chain 5 is arranged in the middle of the head-end guiding mechanism 1, the intermediate straightening mechanism 2 and the end clamping and conveying mechanism 3, and the flat chain 5 is used to drive the hot-rolled narrow strip steel 4 to move.

[0017] During actual use, the head of the hot-rolled narrow strip steel 4 after rolling of the present invention passes through the serpentine vibrator 104, and is transferred from the first conical transition section 105 to the flat chain 5 via the guide 102, until the entire hot-rolled narrow strip steel 4 is distributed in a serpentine shape on the flat chain 5, and the flat chain 5 is in a continuous working cycle at a set speed toward the coiler 6. After the head of the hot-rolled narrow strip steel 4 passes through the clamping roller fixedly installed in the second conical transition section 303 in front of the coiler 6, it enters the core shaft of the coiler 6, and the coiler 6 starts and rotates at high speed to coil the strip steel to the tail to form a strip steel coil. The present invention realizes the centering, straightening, and clamping of the hot-rolled narrow strip steel in the flat chain conveying process through the sequentially connected head end guiding mechanism, the middle straightening mechanism, and the end clamping mechanism, and controls the deformation of the narrow strip steel head throughout the process, thereby improving the reliability of the equipment and realizing automatic head traction of the hot-rolled narrow strip steel. Example 2

[0018] Preferably, on the basis of Example 1, in this embodiment, a first belt head detector 103 is provided at the inlet end of the snake vibrator 104, second belt head detectors 203 are provided on both sides of the straightener 202, and a third belt head detector 302 is provided on the clamp 301.

[0019] During actual use, the inlet end of the snake vibrator 104 of the present invention is provided with a first strip head detector 103. Before the hot-rolled narrow strip 4 is vibrated, the first strip head detector 103 detects the strip head and sends a signal. The water cooler 101 automatically selects the cooling water volume and water flow time according to the model of the hot-rolled narrow strip 4. The cooling water in the water cooling cover of the water cooler 101 is sprayed toward the center line on both sides of the center line of the flat chain 5. The second strip head detector 203 is provided on both sides of the centralizer 202. The strip head of the hot-rolled narrow strip 4 contacts the second strip head detector 203 of the intermediate centralizer 2. The second strip head detector 203 sends a signal. After the centralizer 201 is accelerated to a speed equal to or slightly higher than the speed of the flat chain 5, the centralizer 202 clamps the strip head of the hot-rolled narrow strip 4, clamps and drags it forward for a certain distance, and then releases the strip head. The centralizer 201 stops and reverses back to the starting point of the work; at this time, the entire hot-rolled narrow strip 4 is distributed on the flat chain 5 in a snake shape. The clamping device 301 is provided with a third strip head detector 302. When the strip head of the hot-rolled narrow strip 4 reaches the third strip head detector (302) installed in front of the coiler 6, the detection mechanism sends a signal. After the strip head of the hot-rolled narrow strip 4 passes through the clamping roller of the second conical transition section 303, it enters the core shaft of the coiler 6. The coiler 6 starts and rotates at high speed to coil the strip to the tail to form a strip coil. Example 3

[0020] Preferably, on the basis of Example 1 or Example 2, in this embodiment, the guide 102, the snake vibrator 104, the centralizer 202 and the clamp 301 are on the same axis.

[0021] In actual use, the guide 102 , the vibrator 104 , the centralizer 202 and the clamp 301 of the present invention are on the same axis, which facilitates the traction of the hot-rolled narrow strip steel 4 . Example 4

[0022] A three-stage straightening and traction method for a hot-rolled narrow strip steel strip head, using the three-stage straightening and traction device for a hot-rolled narrow strip steel strip head as described above, comprises the following steps: S1: The head of the hot-rolled narrow strip steel 4 after rolling passes through the vibrator 104 and is transferred from the first conical transition section 105 to the flat chain 5 via the guide 102; S2: The speed of the leader of the hot-rolled narrow strip steel 4 on the flat chain 5 decreases and the leader is relatively stationary. The middle section of the hot-rolled narrow strip steel 4 begins to accumulate on the flat chain 5 in a serpentine shape. The leader of the hot-rolled narrow strip steel 4 contacts the second leader detector 203 of the intermediate straightening mechanism 2. The second leader detector 203 sends a signal. After the straightening vehicle 201 is accelerated to a speed equal to or slightly higher than the speed of the flat chain 5, the straightening device 202 clamps the leader of the hot-rolled narrow strip steel 4, clamps and drags it forward for a certain distance, and then releases the leader. The straightening vehicle 201 stops and returns to the working starting point in the reverse direction. At this time, the entire hot-rolled narrow strip steel 4 is distributed on the flat chain 5 in a serpentine shape, and the flat chain 5 runs toward the coiler 6 at the set speed. S3: When the head of the hot-rolled narrow strip steel 4 reaches the third head detector 302 installed in front of the coiler 6, the detection mechanism sends a signal, and the head of the hot-rolled narrow strip steel 4 passes through the clamping roller of the second conical transition section 303 and enters the core shaft of the coiler 6. The coiler 6 starts and rotates at high speed to coil the strip to the tail to form a strip coil.

[0023] In step S1, the head of the hot-rolled narrow strip steel 4 enters the first conical transition section 105 through the vibrator 104, and the water cooler 101 automatically selects the cooling water volume and water flow time according to the model of the hot-rolled narrow strip steel 4. The cooling water in the water cooling hood of the water cooler 101 is sprayed toward the center line on both sides of the center line of the flat chain 5.

[0024] When the present invention is used, the hot-rolled narrow strip steel passes through the outlet of the oscillator at a high temperature and high speed. First, the temperature of the narrow strip steel head is reduced by the water spray cooling method of the head end straightening mechanism, thereby increasing the rigidity of the narrow strip steel head. Then, under the action of the guide of the head end straightening mechanism, the strip head maintains a correct posture and position from the initial stage of entering the flat chain, thereby preventing the narrow strip steel head from impacting the flat chain plate or side wall at a high temperature and red hot state at a high speed, thereby greatly reducing the probability of abnormal deformation of the narrow strip steel head. After the narrow strip steel head enters the flat chain under the forward advancement of the subsequent strip steel, the speed of the narrow strip steel head decreases and becomes relatively stationary with the flat chain. At this time, through the combined action of the straightening, clamping and traction of the reciprocating follower intermediate straightener in the middle of the flat chain, the strip head of a certain length at the end of the narrow strip steel is accurately placed near the symmetrical center line of the flat chain, and maintains a moderate curvature to prevent it from falling over. At the end of the flat chain, it enters between the clamping rollers of the coiler, and the clamping device of the end clamping mechanism clamps and centers the narrow strip steel head in a moving state and realizes auxiliary traction and feeding.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A three-stage straightening and traction device for hot-rolled narrow strip steel strip head, characterized in that: The invention comprises a head end guiding mechanism (1), an intermediate straightening mechanism (2) and a terminal clamping mechanism (3) which are connected in sequence, wherein the head end guiding mechanism (1) comprises a water cooler (101) and a guide (102), a first conical transition section (105) is provided on the outer side of the water cooler (101), and a snake vibrator (104) is connected to the small end of the first conical transition section (105), the intermediate straightening mechanism (2) comprises a straightening car body (201), a straightening device (202) is provided in the middle of the straightening car body (201), the terminal clamping mechanism (3) comprises a clamping device (301), a second conical transition section (303) is provided on the outer side of the clamping device (301), and a coiler (6) is provided on the outer side of the conical end of the second conical transition section (303), and a flat plate chain (5) is provided in the middle of the head end guiding mechanism (1), the intermediate straightening mechanism (2) and the terminal clamping mechanism (3), and the flat plate chain (5) is used to drive the hot rolled narrow strip steel (4) to move.

2. According to claim 1, a three-stage straightening and traction device for hot-rolled narrow strip steel strip head, characterized in that: A first belt head detector (103) is provided at the inlet end of the snake vibrator (104), second belt head detectors (203) are provided on both sides of the centralizer (202), and a third belt head detector (302) is provided on the clamping device (301).

3. According to claim 3, a three-stage straightening and traction device for hot-rolled narrow strip steel strip head is characterized in that: The guide (102), the snake vibrator (104), the centralizer (202) and the clamp (301) are located on the same axis.

4. A three-stage straightening and traction method for a hot-rolled narrow strip steel strip head, using a three-stage straightening and traction device for a hot-rolled narrow strip steel strip head as claimed in claim 3, characterized in that: The following steps are involved: S1: The head of the hot-rolled narrow strip steel (4) after rolling passes through a snake vibrator (104), and is transferred from the first conical transition section (105) to the flat chain (5) via a guide (102); S2: The speed of the leading edge of the hot-rolled narrow steel strip (4) on the flat chain (5) decreases and the strip becomes relatively stationary with respect to the flat chain (5). The middle section of the hot-rolled narrow steel strip (4) begins to accumulate in a serpentine shape on the flat chain (5). The leading edge of the hot-rolled narrow steel strip (4) contacts the second leading edge detector (203) of the intermediate straightening mechanism (2). The second leading edge detector (203) sends a signal. After the straightening vehicle (201) is accelerated to a speed equal to or slightly higher than the speed of the flat chain (5), the straightening device (202) clamps the leading edge of the hot-rolled narrow steel strip (4), clamps and drags the leading edge forward for a certain distance, and then releases the leading edge. The straightening vehicle (201) stops and returns to the starting point in the opposite direction. At this time, the entire hot-rolled narrow steel strip (4) is distributed in a serpentine shape on the flat chain (5), and the flat chain (5) runs in the direction of the coiler (6) at the set speed. S3: When the head of the hot-rolled narrow steel strip (4) reaches the third head detector (302) installed in front of the coiler (6), the detection mechanism sends a signal, and the head of the hot-rolled narrow steel strip (4) passes through the pinch roller of the second conical transition section (303) and enters the core shaft of the coiler (6). The coiler (6) starts and rotates at high speed to coil the strip to the tail, forming a strip coil.

5. A three-stage straightening and traction method for a hot-rolled narrow strip steel strip head according to claim 4, characterized in that: In the step S1, the head of the hot-rolled narrow steel strip (4) enters the first conical transition section (105) through the vibrator (104), the water cooler (101) automatically selects the cooling water volume and water flow time according to the model of the hot-rolled narrow steel strip (4), and the cooling water in the water cooling hood of the water cooler (101) is sprayed on both sides of the center line of the flat chain (5) relative to the center line.

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