An automatic adjustment device and adjustment method for the relationship between piling and pulling steel in a rolling mill

Abstract

An automatic adjustment device for the stacking and pulling steel relationship between rolling mills, comprising a front guiding device, a rear guiding device, a scanner and a PLC controller. The front guiding device includes a base, a front guiding groove and a rotation driving mechanism. The front end of the front guiding groove is rotatably connected to the base, and the rotation driving mechanism is connected to the rear end of the front guiding groove. A fixed roller is also installed at the end of the front guiding groove. The rear guiding device includes a frame, a support seat and a rear guiding groove. The rear guiding groove is composed of a vertical side plate and an L-shaped plate. The vertical side plate is fixed to the side of the frame, and the L-shaped plate is turned downward under the action of a flipping mechanism to open the rear guiding groove. The present invention makes full use of the fact that the downward flipping of the rear guiding groove has a sufficiently large space, improves the front guiding groove into a swingable guiding groove structure up and down, and uses the self-weight of the front guiding groove to swing downward, so that the steel piece forms an arc under the guidance of its own weight and the fixed roller. The downward arc descent distance is scanned by the scanner and compared with the distance set in the PLC controller to realize the automatic adjustment of the stacking and pulling steel relationship between the 16# and 19# rolling mills.

Description

Technical Field

[0001] The present invention relates to the technical field of bar rolling production, and more specifically to an automatic adjustment device and adjustment method for the stacking and pulling steel relationship between rolling mills. Background Art

[0002] The bar rolling production line uses the split rolling process to produce straight threaded steel bars. In order to further reduce the alloy cost, the inter-rolling controlled cooling process is adopted to improve the product performance and ensure that the finished product performance is guaranteed when the billet composition decreases. The specific controlled cooling mode is that the rolled piece is strongly cooled after being split at K3, and after a certain distance of temperature recovery, it enters the K2 pass. By this method, the grains are refined and the mechanical properties of the finished product are improved.

[0003] As Figure 1 shown, in order to ensure the stability of the finished product negative deviation, a vertical loop is used between the 16# rolling mill 1' and the 19# rolling mill 2' to adjust the stacking and pulling steel relationship. If the 9# loop 3' is used, the loop is far from the upstream stand (16# rolling mill 1'), there are problems such as untimely loop adjustment and when a stacking steel fault occurs in the 9# loop 3', the steel parts often rush out from the outlet of the 16# rolling mill 1', and the fault destructiveness is relatively large. There is also a 6# vertical loop 4' at the outlet of the 16# rolling mill 1'. The loop control is stable and the weight stability of the finished product through the bar is relatively good. However, after the steel parts come out of the 16# rolling mill 1', they need to pass through the 6# vertical loop 4' and then enter the water cooler 5' (the cooling lags by about 4.4 m). At this time, the grains of the steel parts grow, affecting the mechanical properties of the finished product; on the other hand, when the position of the water cooler is moved backward, the temperature recovery distance of the rolled piece decreases, the temperature difference between the core and the surface of the rolled piece is larger, and the surface temperature non-uniformity increases, resulting in a mixed crystal phenomenon of locally coarse grains on the cross-section of the finished product, and the mechanical properties of the finished product will decline. Therefore, we provide an automatic adjustment device and adjustment method for the stacking and pulling steel relationship between rolling mills. Summary of the Invention

[0004] The present invention provides an automatic adjustment device and adjustment method for the stacking and pulling steel relationship between rolling mills, and its main purpose is to ensure the implementation of the inter-rolling controlled cooling process and at the same time ensure the stacking and pulling steel relationship of the rolled pieces between the 16# and 19# rolling mills during the rolling process.

[0005] The present invention adopts the following technical solutions:

[0006] An automatic adjustment device for the stacking and pulling steel relationship between rolling mills, comprising a front guiding device, a rear guiding device, a scanner, and a PLC controller. The front guiding device and the rear guiding device are respectively arranged in front of and behind the breaking shear. The front guiding device includes a base, a front guiding groove, and a rotation driving mechanism. The front end of the front guiding groove is rotatably connected to the base, and the rotation driving mechanism is connected to the rear end of the front guiding groove to drive the front guiding groove to flip up and down along the rolling direction. A fixed roller is further installed at the end of the front guiding groove, and an arc-shaped groove adapted to the fixed roller is provided at the bottom of the front guiding groove below the fixed roller. The rear guiding device includes a frame, a support seat, and a rear guiding groove. The rear guiding groove is composed of a vertical side plate and an L-shaped plate. The vertical side plate is fixed to the side of the frame, and the L-shaped plate is installed on the support seat through a flipping mechanism. The bottom side of the L-shaped plate abuts against the outside of the vertical side plate, and the L-shaped plate flips down under the action of the flipping mechanism to open the rear guiding groove. The scanner is used to scan the descending distance of the lower arc of the red steel, and the scanner is communicatively connected to the PLC controller. The PLC controller is also respectively connected to the speed control mechanisms of the 16# rolling mill and the 19# rolling mill.

[0007] In a preferred embodiment, the front guiding groove is composed of a bottom plate, a partition plate, and two side plates. The partition plate is fixed to the top surface of the bottom plate, and two baffle plates are fixed to both sides of the bottom plate and are higher than the top surface of the partition plate.

[0008] In a preferred embodiment, a fixed roller mounting seat is respectively formed at the rear end of each side plate, and a vertical opening groove is respectively formed at the upper part of each fixed roller mounting seat. Both ends of the central axis of the fixed roller are adjustably assembled up and down on the vertical opening groove.

[0009] In a preferred embodiment, an n-shaped connecting plate is provided between the tops of the rear ends of the two side plates, and the rotation driving mechanism is connected to the n-shaped connecting plate.

[0010] In a preferred embodiment, the rotation driving mechanism includes a cylinder, a connecting head, and a chain. The end of the piston rod of the cylinder is connected to the connecting head. The lower part of the chain passes through the n-shaped connecting plate, and the upper part of the chain is fixedly connected to the connecting head through a pin shaft.

[0011] In a preferred embodiment, the flipping mechanism includes a flipping frame and a driving component. The flipping frame is pivotally connected to the support seat, and one end of the flipping frame is fixedly provided with the L-shaped plate, and the other end is provided with the driving component for realizing the above flipping.

[0012] The present invention also provides a method for adjusting the pushing and pulling steel relationship between rolling mills, including the above automatic adjustment device for the stacking and pulling steel relationship between rolling mills. The specific steps are as follows:

[0013] (1) The rotation drive mechanism of the front guiding device retracts to pull up the rear end of the front guiding groove to a horizontal state for the head of the steel workpiece to pass through.

[0014] (2) After the head of the steel workpiece passes through the front guiding groove and the rear guiding groove and is bitten into the 19# rolling mill of the downstream stand, the rotation drive mechanism moves downward. The rear end of the front guiding groove rotates downward under its own gravity, and the fixed roller at the end of the front guiding groove presses down the steel workpiece, causing the steel workpiece to form an arc under its own weight and the guidance of the fixed roller. At the same time, the flipping mechanism flips downward to open the rear guiding groove.

[0015] (3) The scanner scans the downward arc descent distance of the steel workpiece and compares it with the distance set by the PLC.

[0016] (4) If the scanned value is higher than the set value, it is judged that the steel workpiece between the rolling mills is in an excessive state, and the 16# rolling mill of the upstream stand is decelerated; otherwise, the speed of the 16# rolling mill of the upstream stand is increased.

[0017] From the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages:

[0018] The present invention makes full use of the space at the shearing machine, that is, there is enough space for the rear guiding groove of the rear guiding device to flip downward. At the same time, the front guiding groove is improved into a swingable guiding groove structure. The front guiding groove swings downward under its own weight, causing the steel workpiece to form an arc under its own weight and the guidance of the fixed roller. By scanning the downward arc descent distance with a scanner and comparing it with the distance set in the PLC controller, the automatic adjustment of the stockpiling and pulling relationship between the 16# and 19# rolling mills is realized, reducing the weight fluctuation of the finished product in the whole length, ensuring the rapid cooling of the red steel at the outlet of the 16# rolling mill, further improving the mechanical properties of the finished product, reducing the alloy cost of the billet, and improving the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of an existing bar rolling production line.

[0020] Figure 2 It is a schematic structural diagram of the present invention.

[0021] Figure 3 It is a schematic structural diagram of the front guiding device of the present invention.

[0022] Figure 4 is Figure 3 A left view with the rotation drive mechanism omitted.

[0023] Figure 5 It is a front view of the front guiding groove.

[0024] Figure 6 It is a schematic structural diagram of the rear guiding device of the present invention.

[0025] Figure 7This is the front view of the rear guiding device of the present invention.

[0026] Figure 8 This is the front view of the rear guiding device of the present invention in the open state of the rear guiding groove. Detailed implementation manners

[0027] The following describes the detailed implementation manners of the present invention with reference to the accompanying drawings. To fully understand the present invention, many details are described below. However, for those skilled in the art, the present invention can be implemented without these details. For well-known components, methods, and processes, no further detailed description will be given below.

[0028] An automatic adjustment device for the relationship between piling and pulling steel among rolling mills, referring to Figure 2 , includes a front guiding device 1, a rear guiding device 2, a scanner 3, and a PLC controller 4. The front guiding device 1 and the rear guiding device 2 are respectively arranged in front of and behind the shredding shear 5.

[0029] Referring to Figures 3 to 5 , the front guiding device 1 includes a base 11, a front guiding groove 12, and a rotation driving mechanism. The front end of the front guiding groove 12 is pivotally connected to the base 11, and the rotation driving mechanism is connected to the rear end of the front guiding groove 12 to drive the front guiding groove 12 to turn up and down along the rolling direction. A fixed roller 14 is further installed at the end of the front guiding groove 12, and an arc-shaped groove 120 adapted to the fixed roller 14 is provided at the bottom of the front guiding groove 12 below the fixed roller 14.

[0030] Referring to Figure 4 and Figure 5 , the front guiding groove 12 is composed of a bottom plate 121, a partition plate 122, and two side plates 123. The partition plate 122 is fixed to the top surface of the bottom plate 121, and two baffle plates 123 are fixed to both sides of the bottom plate 121 and are higher than the top surface of the partition plate 122. A fixed roller mounting seat 141 is respectively formed at the rear end of each side plate 123, and a vertical opening groove 1410 is respectively opened at the upper part of each fixed roller mounting seat 141. The two ends of the central axis of the fixed roller 14 are adjustably assembled up and down on the vertical opening groove 1410.

[0031] Referring to Figure 4 and Figure 5 , an n-shaped connecting plate 124 is provided between the top parts of the rear ends of the two side plates 123, and the above rotation driving mechanism is connected to the n-shaped connecting plate 124. The rotation driving mechanism shown in this embodiment includes a first cylinder 131, a connecting head 132, and a chain 133. The end of the piston rod of the first cylinder 131 is fixedly connected to the connecting head 132, and the lower part of the chain 133 passes through the n-shaped connecting plate 124, and the upper part of the chain 133 is fixedly connected to the connecting head 132 through a pin shaft.

[0032] Referring to Figures 3 to 5When the piston rod of the first cylinder 131 retracts, the chain 133 is straightened to pull the rear end of the front guide groove 12 to swing upward, so that the bottom of the front guide groove 12 is in the horizontal steel receiving position for the head of the rolled piece to pass through normally; when the first cylinder 131 extends, the rear end of the front guide groove 12 droops downward under its own gravity, and the free fixing roller 14 at the end of the front guide groove 12 presses down the steel piece, so that the red-hot steel forms an arc under its own weight and the guidance of the fixing roller 14.

[0033] Refer to Figures 6 to 8 The rear guiding device 2 includes a frame 21, a support seat 22 and a rear guide groove 23. The rear guide groove 23 is composed of a vertical side plate 231 and an L-shaped plate 232. The vertical side plate 231 is fixed to the side of the frame 21, and the L-shaped plate 232 is installed on the support seat 22 through a turning mechanism. The bottom side of the L-shaped plate 232 abuts against the outside of the vertical side plate 231, and the L-shaped plate 232 turns downward under the action of the turning mechanism to open the rear guide groove 23.

[0034] Refer to Figure 6 and Figure 7 The turning mechanism includes a turning frame 241 and a driving component. The turning frame 241 is pivotally connected to the support seat 22, and one end of the turning frame 241 is fixedly provided with the L-shaped plate 232, and the other end is provided with a driving component to realize the above-mentioned turning. The driving component is preferably a second cylinder 242. The cylinder body of the second cylinder 242 is fixed on the frame 21, and the piston rod is hinged on the turning frame 241.

[0035] Refer to Figure 2 The above scanner 3 is arranged between the front guiding device 1 and the rear guiding device 2 for scanning the descending distance of the lower arc of the red-hot steel. The scanner 3 is communicatively connected to the PLC controller 4, and the PLC controller 4 is also respectively connected to the speed mechanisms of the 16# rolling mill and the 19# rolling mill for control.

[0036] The adjustment method of the above automatic adjustment device for the stacking and pulling steel relationship between rolling mills is as follows:

[0037] (1) The rotation driving mechanism of the front guiding device retracts to pull up the rear end of the front guide groove to the horizontal state for the head of the steel piece to pass through.

[0038] (2) After the head of the steel piece passes through the front guide groove and the rear guide groove and is bitten into the 19# rolling mill of the downstream stand, the rotation driving mechanism moves downward. The rear end of the front guide groove rotates downward under its own gravity, and the fixing roller at the end of the front guide groove presses down the steel piece, so that the steel piece forms an arc under its own weight and the guidance of the fixing roller. At the same time, the turning mechanism turns downward to open the rear guide groove.

[0039] (3) The scanner scans the descending distance of the lower arc of the steel piece and compares it with the distance set by the PLC.

[0040] (4)If the scanned value is higher than the set value, it is determined that the steel parts between the rolling mills are in an excessive state, and the speed of the 16# rolling mill in the upstream stand is reduced. Otherwise, the speed of the 16# rolling mill in the upstream stand is increased.

[0041] The present invention makes full use of the space at the flying shear, that is, the rear guide groove of the rear guiding device can be turned downward with sufficient space. At the same time, the front guide groove is improved into a swingable guide groove structure up and down. The front guide groove swings downward by its own weight, so that the steel parts form an arc under the guidance of their own weight and guide wheels. The descending distance of the lower arc is scanned by a scanner and compared with the distance set in the PLC controller, so as to automatically adjust the piling and pulling relationship between the 16# and 19# rolling mills, reduce the weight fluctuation of the finished product in the whole length, ensure the rapid cooling of the red steel at the outlet of the 16# rolling mill, further improve the mechanical properties of the finished product, reduce the alloy cost of the billet, and improve the economic benefits of the enterprise.

[0042] The above is only the specific embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modification of the present invention using this concept shall fall within the scope of infringement of the protection of the present invention.

Claims

1. An automatic adjustment device for the stacking and pulling steel relationship between rolling mills, Characterized in that: It includes a front guiding device, a rear guiding device, a scanner and a PLC controller. The front guiding device and the rear guiding device are respectively arranged in front of and behind the shredding shear. The front guiding device includes a base, a front guiding groove and a rotation driving mechanism. The front end of the front guiding groove is rotatably connected to the base, and the rotation driving mechanism is connected to the rear end of the front guiding groove to drive the front guiding groove to turn up and down along the rolling direction. A fixed roller is also installed at the end of the front guiding groove, and an arc-shaped groove adapted to the fixed roller is provided at the bottom of the front guiding groove under the fixed roller. The front guiding groove is composed of a bottom plate, a partition plate and two side plates. The partition plate is fixed on the top surface of the bottom plate, and two baffle plates are fixed on both sides of the bottom plate and are higher than the top surface of the partition plate. An n-shaped connecting plate is provided between the top ends of the rear ends of the two side plates, and the rotation driving mechanism is connected to the n-shaped connecting plate. The rotation driving mechanism includes a cylinder, a connecting head and a chain. The end of the piston rod of the cylinder is connected to the connecting head. The lower part of the chain passes through the n-shaped connecting plate, and the upper part of the chain is fixedly connected to the connecting head through a pin shaft. The rear guiding device includes a frame, a support seat and a rear guiding groove. The rear guiding groove is composed of a vertical side plate and an L-shaped plate. The vertical side plate is fixed on the side of the frame, and the L-shaped plate is installed on the support seat through a turning mechanism. The bottom side of the L-shaped plate abuts against the outside of the vertical side plate, and the L-shaped plate turns down under the action of the turning mechanism to open the rear guiding groove. The scanner is used to scan the downward arc drop distance of the red steel, and the scanner is communicatively connected to the PLC controller. The PLC controller is also respectively connected to the speed control mechanisms of the 16# rolling mill and the 19# rolling mill.

2. The automatic adjustment device for the stacking and pulling steel relationship between rolling mills according to claim 1, Characterized in that: A fixed roller mounting seat is respectively formed at the rear end of each side plate, and a vertical opening groove is respectively opened at the upper part of each fixed roller mounting seat. The two ends of the central axis of the fixed roller are adjustably assembled up and down in the vertical opening groove.

3. The automatic adjustment device for the stacking and pulling steel relationship between rolling mills according to claim 1, Characterized in that: The turning mechanism includes a turning frame and a driving component. The turning frame is pivotally connected to the support seat, and one end of the turning frame is fixedly provided with the L-shaped plate, and the other end is provided with the driving component for realizing the above turning.

4. A method for adjusting the pushing and pulling steel relationship between rolling mills, including the automatic adjustment device for the stacking and pulling steel relationship between rolling mills according to claim 1, Characterized in that, The specific steps are as follows: (1) The rotation driving mechanism of the front guiding device retracts to pull up the rear end of the front guiding groove to a horizontal state for the head of the steel supply part to pass through; (2)After the head of the steel workpiece passes through the front guide groove and the rear guide groove and is bitten into the 19# rolling mill of the downstream stand, the driving mechanism rotates and moves downward. The rear end of the front guide groove rotates downward under its own gravity, and the fixed roller at the end of the front guide groove presses down the steel workpiece, so that the steel workpiece forms an arc under its own weight and the guidance of the fixed roller. At the same time, the flipping mechanism flips downward to open the rear guide groove; (3)The scanner scans the descending distance of the lower arc of the steel workpiece and compares it with the distance set by the PLC; (4)If the scanned value is higher than the set value, it is judged that the steel workpiece between the rolling mills is in an excessive state, and the 16# rolling mill of the upstream stand is decelerated. Otherwise, the speed of the 16# rolling mill of the upstream stand is increased.

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