A cold bed control method for large-size high-quality steel bar rapid collection

Abstract

The present application relates to the technical field of cold bed control method, and particularly relates to a cold bed control method for rapid collection of large-specification excellent steel bars, which comprises the following steps: collecting the large-specification excellent steel bars through a front cold bed, a middle straightening, a middle rapid collection and a final straightening, and then completing the final rapid collection. After the large-specification bars are cut by a hot saw, the alloy bars may be bent, and the straightness of the round steel is improved after the bent bars are straightened by the cold bed. The straightness of the round steel meets the standard requirements after the round steel is rolled forward and backward. The cooling conditions of the alloy steel production can meet various states. The cost of offline straightening is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of cooling bed control methods, and in particular to a cooling bed control method for the rapid collection of large-diameter special steel bars. Background Technology

[0002] During the production of large-diameter alloy steel bars, the small batch size and unstable production control make it difficult to control the temperature of the bars themselves. After hot sawing, high-alloy steel bars are placed on a cooling bed at high temperatures, making them prone to bending during sawing and roller conveyor travel. The existing cooling bed cannot achieve the straightening effect. Behind the cooling bed are moving and fixed toothed racks. When the bar temperature is critical and needs to be entered into the pit, it cannot be collected quickly, which affects the entry temperature and is prone to internal defects. Summary of the Invention

[0003] To overcome existing shortcomings, this invention provides a cooling bed control method for the rapid collection of large-size special steel bars. A row of round steel bars, after being sawn, is placed on the cooling bed. A rotating flat support lifts this row of round steel bars onto a transverse chain in front of the cooling bed. The chain moves the round steel bars to a limiting device at the end. The distance between the round steel bars and a first straightening plate is controlled by the limiting device according to the bar specifications. A stepping rack can pick up one round steel bar in each step, ensuring one round steel bar is placed in each tooth. After passing through a first staggered straightening plate group, the round steel bars are rolled forward (with a 50mm stagger between teeth) to adjust straightness. Subsequently, the temperature of the round steel bars is detected at temperature measuring points on both sides of the rapid collection section. Based on the process temperature requirements, it is determined whether the first lifting wedge group should be raised, and whether the round steel bars need to be rolled forward rapidly. After passing through a second staggered straightening plate group (with a 50mm stagger between teeth), the straightness is adjusted again by rolling straightening. Temperature detection devices are installed on both sides of the final rapid collection section to detect the temperature. Based on the process temperature requirements, it is determined whether the second lifting wedge group should be raised or lowered, and the round steel bars are collected rapidly.

[0004] The technical solution adopted by this invention to solve its technical problem is: a cooling bed control method for rapid collection of large-size special steel bars, comprising rapidly collecting large-size special steel bars by passing them through a front section on the cooling bed, a middle section straightening, a middle section rapid collection, and an end section straightening before completing the end rapid collection; wherein, the cooling bed is provided with a transverse chain, a first set of staggered straight plates, a middle section collection device, a second set of staggered straight plates, and an end collection device in sequence according to the direction of rapid collection of large-size special steel bars; a first set of lifting wedges is provided inside the middle section collection device, and a second set of lifting wedges is provided inside the end collection device; temperature measuring points are provided on both sides of the middle section collection device and the end collection device; after the large-size special steel bars complete the front section on the cooling bed step by passing through the transverse chain, they are straightened by the first set of staggered straight plates, the middle section rapid collection is completed by the first set of lifting wedges, the straightening is completed by the second set of staggered straight plates, and finally the end section is collected by the second set of lifting wedges.

[0005] According to another embodiment of the present invention, it further includes three sets of limiting devices at the contact point between the end of the transverse chain and the front end of the staggered tooth straight plate group; the limiting devices are movable and the displacement position from the staggered tooth straight plate group is L0, wherein L0=LD is satisfied according to the production specification diameter D of the large-size special steel bar and the rack width L of the staggered tooth straight plate group.

[0006] According to another embodiment of the present invention, it further includes that the temperature Ti1 of the round steel is detected by the temperature measuring points on both sides of the intermediate collection device, and the steel grade of the intermediate collection device is set to a rapid step temperature T0.

[0007] According to another embodiment of the present invention, the method further includes that the temperature Ti2 of the round steel is detected by the temperature measuring points on both sides of the end collecting device, and the steel type of the end collecting device is set to a rapid step temperature T1.

[0008] According to another embodiment of the present invention, the intermediate collection device and the terminal collection device both include a moving beam and a fixed beam; the moving beam and the fixed beam of the intermediate collection device are both rack-type, and the tips of the moving teeth and the fixed teeth are 50mm apart at their lowest positions; the fixed beam of the terminal collection device is a flat, toothless plate, and the moving beam is a rack beam.

[0009] According to another embodiment of the present invention, the operation of rapidly collecting large-diameter special steel bars further includes the following steps: Step 1: The front section is placed on the cooling bed. After the round steel is placed on the cooling bed, it moves forward in a row. When it comes into contact with the limit device, the transverse chain stops moving. After the round steel is picked up by the stepping rack of the staggered straight plate group 1, the transverse chain resumes moving. When the next round steel comes into contact with the limit device again, the transverse chain stops, and the stepping rack of the staggered straight plate group 1 picks up the steel. If the limit does not receive a signal, the stepping rack stops moving after one cycle. Step 2, mid-section straightening: the round steel is straightened by the staggered tooth straightening plate group to form a relatively straight round steel. Step 3: Rapid collection in the middle section. If Ti1≥T0, the round steel will advance step by step with one tooth. If the temperature of the round steel is detected as Ti1<T0, it will be lifted by the lifting wedge group 1. The round steel will roll forward quickly after passing through the lifting wedge group 1. Step 4, end straightening: The round steel is straightened by the two staggered teeth of the staggered straight plate group to form a round steel with relatively straightness; Step 5: Rapid collection at the end. If Ti2≥T1, the round steel is advanced step by step with one tooth. When the temperature of the round steel Ti2<T1 is detected, the lifting operation is performed by lifting wedge group 2.

[0010] The beneficial effects of this invention are that, after large-diameter bars undergo hot sawing, the potential bending of the alloy bars is improved by straightening them using a cold bed with staggered teeth. Through rolling forward and backward, the straightness meets standard requirements. Furthermore, the alloy steel production process can meet various cooling conditions, reducing offline straightening costs. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a top view of the cooling bed; Figure 2 This is the front view of the cooling bed; Figure 3 This is a structural diagram of the lifting wedge; Figure 4 This is a structural diagram of the assembly of the transverse chain, the staggered tooth straight plate group, and the middle section collection device.

[0013] In the diagram: 1. Transverse chain; 2. Alternating tooth straight plate group one; 3. Middle section collection device; 4. Alternating tooth straight plate group two; 5. End collection device; 6. Lifting wedge group one; 7. Lifting wedge group two. Detailed Implementation

[0014] like Figure 1 This is a schematic diagram of the structure of the present invention, a cooling bed control method for rapid collection of large-size special steel bars, characterized by including rapid collection of large-size special steel bars through a front section on the cooling bed, a middle section straightening, a middle section rapid collection, and an end section straightening before completing the end rapid collection; wherein, the cooling bed is provided with a transverse chain 1, a toothed straight plate group 1 2, a middle section collection device 3, a toothed straight plate group 2 4, and an end collection device 5 in sequence according to the direction of rapid collection of large-size special steel bars; a lifting wedge group 1 6 is provided inside the middle section collection device 3, and a lifting wedge group 2 7 is provided inside the end collection device 5; temperature measuring points are provided on both sides of the middle section collection device 3 and the end collection device 5; after the large-size special steel bars complete the front section on the cooling bed step through the transverse chain 1, they are straightened by the toothed straight plate group 1 2, the middle section rapid collection is completed by the lifting wedge group 1 6, the straightening is completed by the toothed straight plate group 2 4, and finally the end section is collected by the lifting wedge group 2 7.

[0015] Specifically, the fixed part of the straightening plate group 12 is a straightening plate of 150*500mm*10 steps, and the position of the moving tooth tip is offset 50mm ahead of the fixed tooth; the lifting wedge group 2 7 and the lifting wedge group 1 6 are both lifting and movable, and move according to the position of the temperature detection point.

[0016] According to another embodiment of the present invention, it further includes that three sets of limiting devices are provided at the contact point between the end of the transverse chain 1 and the front end of the staggered tooth straight plate group 2; the limiting devices are movable and the displacement position from the staggered tooth straight plate group 2 is L0, wherein, according to the production specification diameter D of the large-size special steel bar and the tooth width L of the staggered tooth straight plate group 2, L0=LD is satisfied.

[0017] According to another embodiment of the present invention, the method further includes that the temperature Ti1 of the round steel is detected by the temperature measuring points on both sides of the intermediate collection device 3, and the steel grade of the intermediate collection device 3 is set to a rapid step temperature T0.

[0018] According to another embodiment of the present invention, it further includes that the temperature Ti2 of the round steel is detected by the temperature measuring points on both sides of the end collecting device 5, and the steel type of the end collecting device 5 is set to a rapid step temperature T1.

[0019] According to another embodiment of the present invention, the intermediate collection device 3 and the terminal collection device 5 both include a moving beam and a fixed beam; the moving beam and the fixed beam of the intermediate collection device 3 are both rack-type, and the tips of the moving teeth and the fixed teeth are 50mm apart at their lowest positions; the fixed beam of the terminal collection device 5 is a flat, toothless plate, and the moving beam is a rack beam.

[0020] According to another embodiment of the present invention, the operation of rapidly collecting large-diameter special steel bars further includes the following steps: Step 1: The front section is placed on the cooling bed. After the round steel is placed on the cooling bed, it moves forward in a row. When it comes into contact with the limit device, the transverse chain 1 stops moving. After the round steel is picked up by the stepping rack of the staggered straight plate group 2, the transverse chain 1 resumes moving. When the next round steel comes into contact with the limit device again, the transverse chain 1 stops, and the stepping rack of the staggered straight plate group 2 picks up the steel. If the limit does not receive a signal, the stepping rack stops moving after one cycle. If a production failure occurs, manual intervention and adjustment can be performed. Step 2, mid-section straightening: the round steel is straightened by the staggered straight plate group 1-2 staggered straightening to form a round steel with relatively straightness; Step 3, rapid collection in the middle section. If Ti1≥T0, the round steel will advance step by step with one tooth. If the temperature of the round steel is detected as Ti1<T0, it will be lifted by the lifting wedge group 6. The round steel will roll forward rapidly after passing the lifting wedge group 6. Step 4, end straightening: The round steel is straightened by the staggered tooth straightening plate group 2 with 4 staggered teeth to form a round steel with relatively straightness; Step 5: Rapid collection at the end. If Ti2≥T1, the round steel is advanced step by step with one tooth. When the temperature of the round steel Ti2<T1 is detected, the lifting operation is performed by lifting wedge group 2 7.

[0021] Specifically, in the production process of large bars, 42CrMo steel with a diameter of 70mm is produced. The required entry temperature is ≥450℃. During hot sawing, due to uneven cooling during sawing and the small batches of bars filling the sawing rollers, the round bars on both sides form arc bends. The temperature on the upper cooling bed is around 700℃. With a rack width of L=200mm, the moving rack step L0=130mm. The round bars are straightened by the transverse chain 1 through the staggered straight plate group 2, forming relatively straight round bars. When the temperature is detected at 600℃ by the temperature measuring sections on both sides of the intermediate collection device 3, the moving lifting wedge group 6 moves to this position for lifting and lowering. The round bars roll on the fixed beam, further improving the straightness to within 4‰. Then, after rolling straightening by the staggered straight plate group 4, the straightness is further improved to meet the offline straightness requirement of 3‰. When the temperature is detected at 470℃ by the temperature measuring points on both sides of the subsequent end collection device 5, the moving lifting wedge group 7 moves to this position for lifting and lowering. The round bars roll into the collection trough for collection and entry into the pit.

[0022] The above description is illustrative only and not restrictive of the present invention. Those skilled in the art will understand that many modifications, variations or equivalents can be made without departing from the spirit and scope defined by the appended claims, and all such modifications, variations or equivalents will fall within the protection scope of the present invention.

Claims

1. A cooling bed control method for rapid collection of large-diameter special steel bars, characterized in that, The process includes rapidly collecting large-size special steel bars by passing them through a front cooling bed, a middle straightening process, a middle rapid collection process, and an end straightening process before completing the end rapid collection process. The cooling bed is equipped with a transverse chain (1), a toothed straight plate group one (2), a middle collection device (3), a toothed straight plate group two (4), and an end collection device (5) in sequence according to the direction of rapid collection of large-size special steel bars. The middle collection device (3) is equipped with a lifting wedge group one (6) on its inner side, and the end collection device (5) is equipped with a lifting wedge group two (7) on its inner side. Temperature measuring points are provided on both sides of the middle collection device (3) and the end collection device (5). After the large-size special steel bars complete the front cooling bed step through the transverse chain (1), they are straightened by the toothed straight plate group one (2), and then the middle rapid collection is completed by the lifting wedge group one (6). After straightening by the toothed straight plate group two (4), they are finally collected at the end by the lifting wedge group two (7).

2. The cooling bed control method for rapid collection of large-diameter special steel bars according to claim 1, characterized in that, Three sets of limiting devices are provided at the contact point between the end of the transverse chain (1) and the front end of the toothed straight plate group (2); the limiting device is movable and the displacement position from the toothed straight plate group (2) is L0, wherein, according to the production specification diameter D of the large-size special steel bar and the rack width L of the toothed straight plate group (2), L0=LD is satisfied.

3. The cooling bed control method for rapid collection of large-diameter special steel bars according to claim 1, characterized in that, The temperature Ti1 of the round steel is detected by the temperature measuring points on both sides of the middle section collection device (3), and the steel grade of the middle section collection device (3) is set to a rapid step temperature T0.

4. The cooling bed control method for rapid collection of large-diameter special steel bars according to claim 1, characterized in that, The temperature Ti2 of the round steel is detected by the temperature measuring points on both sides of the end collection device (5), and the steel type of the end collection device (5) is set to a rapid step temperature T1.

5. The cooling bed control method for rapid collection of large-diameter special steel bars according to claim 1, characterized in that, Both the intermediate collection device (3) and the end collection device (5) include a moving beam and a fixed beam; the moving beam and the fixed beam of the intermediate collection device (3) are both rack-type, and the tips of the moving teeth and the fixed teeth are 50mm apart at their lowest positions; the fixed beam of the end collection device (5) is a flat plate without teeth, and the moving beam is a rack beam.

6. The cooling bed control method for rapid collection of large-diameter special steel bars according to any one of claims 1-5, characterized in that, The operation for rapid collection of large-diameter special steel bars includes the following steps: Step 1: The front section is placed on the cooling bed. After the round steel is placed on the cooling bed, it moves forward in a row. When it comes into contact with the limiting device, the transverse chain (1) stops moving. After the round steel is picked up by the stepping rack of the staggered straight plate group 1 (2), the transverse chain (1) resumes moving. When the next round steel comes into contact with the limiting device again, the transverse chain (1) stops, and the stepping rack of the staggered straight plate group 1 (2) picks up the steel. If the limiting device does not receive a signal, the stepping rack stops moving after one cycle of operation. Step 2, mid-section straightening: the round steel is straightened by the staggered tooth straight plate group 1 (2) to form a round steel with relatively straightness; Step 3, rapid collection in the middle section. If Ti1≥T0, the round steel will advance step by step according to one tooth. When the temperature of the round steel is detected as Ti1<T0, it will be lifted and lowered by the lifting wedge group 1 (6). The round steel will roll forward rapidly after passing the lifting wedge group 1 (6). Step 4, end straightening: the round steel is straightened by the staggered teeth of the second (4) straightening plate group to form a relatively straight round steel; Step 5, rapid collection at the end. If Ti2≥T1, the round steel is moved step by step with one tooth. When the temperature of the round steel is detected as Ti2<T1, the lifting operation is performed by lifting wedge group two (7).

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