Rolling mill device for adjusting the head and tail thickness of a strip

Abstract

This invention belongs to the field of strip steel technology, specifically a rolling mill device for adjusting the thickness of strip steel at both ends. Addressing the problem that existing strip steel production methods often result in excessively thick strips at both ends (approximately 1 meter from the head to the tail), due to the much faster temperature drop at the head and tail compared to the middle, leading to difficulty in thickness control and frequent instances of excessive thickness at both ends (approximately 1 meter from the head to the tail), this invention proposes the following solution: The device includes an outer shell, a sliding plate slidably connected to the inner wall of the outer shell, a sliding plate fixedly mounted on the right side of the sliding plate, a scale fixedly mounted on the right side of the outer shell, a rack fixedly mounted on the inner wall of the outer shell, and a gear rotatably connected to the front of the sliding plate, meshing with the rack. In this invention, the thickness of the raw strip steel can be determined by clamping and measuring the raw material. Adjusting the temperature of each region of the raw strip steel afterward significantly reduces errors.

Description

Technical Field

[0001] This invention relates to the field of strip steel technology, and in particular to a rolling mill with adjustable strip thickness at both ends. Background Technology

[0002] During the production of the 3.5-meter strip, the temperature drop rate at the head and tail of the strip is much higher than that in the middle. The head and tail temperatures are lower during rolling, making it difficult to control the thickness. This often results in the finished product being thicker from the head to the 1-meter mark and from the tail to the 1-meter mark. The maximum thickness reading on the thickness gauge curve can even reach 2 mm. Actual measurements on the steel plate on-site can also reveal this problem. As a result, the thicker sections at the head and tail of the finished steel plate need to be cut off, affecting the yield of the steel plate. Moreover, when the thickness at the head and tail of the finished steel plate is severe, the overall length of the plate is shorter, causing the steel plate to be out of dimensional and resulting in quality disputes. Summary of the Invention

[0003] The purpose of this invention is to solve the problem in the prior art that the strip temperature drops much faster at the head and tail than in the middle, resulting in lower temperatures at the head and tail during rolling, making it difficult to control the thickness and often resulting in the finished product being too thick from the head to 1 meter and from the tail to 1 meter. Therefore, this invention proposes a rolling device that can adjust the thickness of the strip at the head and tail.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A rolling mill with adjustable strip thickness at both ends includes a housing, a sliding plate slidably connected to the inner wall of the housing, a clamping plate fixedly installed on the right side of the sliding plate, a scale fixedly installed on the right side of the housing, a rack fixedly installed on the inner wall of the housing, a gear rotatably connected to the front side of the sliding plate, the gear meshing with the rack, and a positioning mechanism and a control mechanism respectively provided on the left side of the housing, the positioning mechanism cooperating with the gear and the control mechanism respectively.

[0006] Preferably, the control mechanism includes a sliding plate, a positioning rod, a spring, a fixing rod, and a spring seat. A control frame is fixedly installed on the left side of the sliding plate. The positioning rod is slidably connected to the front side of the sliding plate. The positioning rod is fixedly connected to the spring. The spring is fixedly connected to the spring seat. The spring seat is fixedly installed on the front side of the control frame. The positioning rod is fixedly connected to the fixing rod.

[0007] Furthermore, by using a control mechanism to release the gear on the left side of the housing, the sliding plate can be unlocked, thereby unlocking the clamping plate and allowing the sliding plate to drive the clamping plate inside the housing.

[0008] Preferably, the positioning mechanism includes a control rod, a rotating wheel, a winch, and a telescopic rod. The control rod is slidably connected to the front side of the control frame, and the control rod is fixedly connected to the winch. The winch is wound around the rotating wheel, and the rotating wheel is rotatably connected to the front side of the control frame. The rotating wheel is fixedly connected to the telescopic rod, and the telescopic rod is rotatably connected to the fixed rod.

[0009] Furthermore, a positioning mechanism is used to position the sliding plate within the housing, enabling the sliding plate to position the clamping plate, thus allowing the clamping plate to stably clamp and measure the strip steel raw material.

[0010] Preferably, a vertical groove is provided on the right side of the outer shell, and the outer side of the clamping plate slides in contact with the inner wall of the vertical groove.

[0011] Furthermore, the vertical sliding mechanism allows the clamping plate to slide on the right side of the housing, thus fitting into the fixing plate.

[0012] Preferably, a control groove is provided on the left side of the outer casing, and the outer side of the control frame is slidably connected to the inner wall of the control groove.

[0013] Furthermore, the control slide allows the control frame to slide downwards on the left side of the sliding plate, which in turn moves the clamping plate downwards.

[0014] Preferably, a fixing plate is fixedly installed on the bottom right side of the outer casing, and the fixing plate is in slidable contact with the sliding plate.

[0015] Furthermore, the fixing plate is used to support the strip steel, making it easier for the clamping plate to measure the strip steel.

[0016] Beneficial effects:

[0017] 1. Through the control mechanism, the positioning mechanism on the left side of the housing can release the gear, thereby unlocking the sliding plate and the clamping plate, so that the sliding plate can drive the clamping plate inside the housing.

[0018] 2. The positioning mechanism is used to position the sliding plate inside the housing, so that the sliding plate can position the clamping plate, and the clamping plate can stably clamp and measure the strip steel raw material.

[0019] In this invention, the thickness of the strip steel raw material can be obtained by clamping and measuring it. Then, by adjusting the temperature of each area of ​​the strip steel raw material, the error can be greatly reduced. Attached Figure Description

[0020] Figure 1 This is a schematic front view of the structure of a rolling mill with adjustable strip head and tail thickness proposed in this invention.

[0021] Figure 2 This is a side view schematic diagram of the structure of a rolling mill with adjustable strip head and tail thickness proposed in this invention;

[0022] Figure 3 This is a three-dimensional schematic diagram of the structural control frame of a rolling mill with adjustable strip head and tail thickness proposed in this invention.

[0023] Figure 4 The present invention provides a structural attachment for a rolling mill with adjustable strip head and tail thickness. Figure 1 Enlarged diagram of A in the middle.

[0024] In the diagram: 1. Outer shell; 2. Fixing plate; 3. Sliding plate; 4. Rack; 5. Scale; 6. Clamping plate; 7. Gear; 8. Positioning rod; 9. Spring; 10. Control frame; 11. Control rod; 12. Rotary wheel; 13. Winding rope; 14. Fixing rod; 15. Telescopic rod; 16. Spring seat. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Example 1

[0027] Reference Figure 1-4 A rolling mill with adjustable strip thickness at the head and tail includes a housing 1. A sliding plate 3 is slidably connected to the inner wall of the housing 1 via a sliding groove. A clamping plate 6 is welded to the right side of the sliding plate 3. A scale 5 is welded to the right side of the housing 1. A rack 4 is welded to the inner wall of the housing 1. A gear 7 is rotatably connected to the front side of the sliding plate 3 via a rotating shaft. The gear 7 meshes with the rack 4. A positioning mechanism and a control mechanism are respectively provided on the left side of the housing 1. The positioning mechanism cooperates with the gear 7 and the control mechanism respectively.

[0028] In this invention, the control mechanism includes a sliding plate 3, a positioning rod 8, a spring 9, a fixing rod 14, and a spring seat 16. A control frame 10 is welded to the left side of the sliding plate 3. The positioning rod 8 is slidably connected to the front side of the sliding plate 3 through a sliding groove. The positioning rod 8 is welded to the spring 9, the spring 9 is welded to the spring seat 16, the spring seat 16 is welded to the front side of the control frame 10, and the positioning rod 8 is welded to the fixing rod 14. Through the control mechanism, the control mechanism is used to control the positioning mechanism to release the gear 7 on the left side of the outer shell 1, which can unlock the sliding plate 3 and unlock the clamping plate 6, so that the sliding plate 3 can drive the clamping plate 6 inside the outer shell 1.

[0029] In this invention, the positioning mechanism includes a control rod 11, a rotating wheel 12, a winch rope 13, and a telescopic rod 15. The control rod 11 is slidably connected to the front side of the control frame 10 via a groove. The control rod 11 is welded to the winch rope 13, which is wound around the rotating wheel 12. The rotating wheel 12 is rotatably connected to the front side of the control frame 10 via a rotating shaft. The rotating wheel 12 is welded to the telescopic rod 15, which is rotatably connected to the fixed rod 14 via a rotating shaft. The positioning mechanism is used to position the sliding plate 3 within the outer casing 1, so that the sliding plate 3 can position the clamping plate 6, and the clamping plate 6 can stably clamp and measure the strip steel raw material.

[0030] In this invention, a vertical sliding groove is provided on the right side of the outer shell 1, and the outer side of the clamping plate 6 slides in contact with the inner wall of the vertical sliding groove. The vertical sliding is used so that the clamping plate 6 can slide on the right side of the outer shell 1 and fit with the fixing plate 2.

[0031] In this invention, a control slide groove is provided on the left side of the outer shell 1. The outer side of the control frame 10 is slidably connected to the inner wall of the control slide groove through the slide groove. The control slide allows the control frame 10 to slide downward on the left side of the sliding plate 3, thereby driving the clamping plate 6 to move downward.

[0032] In this invention, a fixing plate 2 is welded to the bottom right side of the outer shell 1. The fixing plate 2 slides in contact with the sliding plate 3. The fixing plate 2 is used to support the strip steel, which facilitates the clamping plate 6 to measure the strip steel.

[0033] Example 2

[0034] The difference between this embodiment and embodiment 1 is that the method of positioning the sliding plate 3 in this invention can be replaced by the method of positioning with bolts. The bolts are inserted from the front side of the outer shell 1 and slidably connected to the front side of the outer shell 1 through the groove, and then the bolts are threadedly connected to the sliding plate 3. However, the method of positioning the sliding plate 3 with bolts requires the use of tools and is not efficient. This invention does not have the above-mentioned disadvantages.

[0035] Working principle: By pulling the control lever 11 upward on the control frame 10, the control lever 11 pulls the winch 13, which drives the rotating wheel 12 to rotate counterclockwise. The rotating wheel 12 then drives the telescopic rod 15 to rotate counterclockwise, and the telescopic rod 15 drives the fixed rod 14 to move to the left. The fixed rod 14 then drives the positioning rod 8 to move to the left. The positioning rod 8 then disengages from the gear 7 and compresses the spring 9, which then presses down on the control frame 10. The control frame 10 then drives the gear 7 to descend, and the gear 7 is driven to rotate by the rack 4, thus... The sliding plate 3 moves downwards and then comes into contact with the strip steel material on the fixed plate 2. After the clamping plate 6 is in contact with the steel strip, the scale on the scale 5 at the bottom of the clamping plate 6 can be observed to measure the strip steel. Then, the control rod 11 is released, and the control rod 11 releases the positioning rod 8. The positioning rod 8 is reset by the return of the spring 9, and the spring 9 pushes the positioning rod 8 to mesh with the gear 7, thereby positioning the gear 7 and the clamping plate 6. This facilitates the observation of the thickness of the strip steel material and the calculation and setting of the strip steel according to the rolling characteristics and rolling force. The head roll gap feedforward value is based on rolling force sampling at 5% of the tail length of the previous pass. During sampling, the maximum and average rolling force points are identified and their positions are recorded. Based on the rolling force at the sampling points of the previous pass's tail, the secondary calculated thickness, and the desired rolling force, we can calculate the actual tail thickness of the previous pass (the difference between the actual and target thickness), and the desired rolling force for rolling the strip head to the target thickness in this pass. This desired rolling force has elasticity... The difference between the jump value and the bounce value calculated by the secondary expected rolling force of this pass is the maximum limit of the head roll gap feed value of this pass. According to the thickness of the strip head, the slope of the feed value to 0 can be reasonably set. The temperature of the head and tail steel decreases more as it approaches the head and tail. On the operation screen, you can set whether this function is enabled or disabled, and select soft or hard steel. Depending on the steel type, you can choose to enable or disable different maximum feed value limits for soft and hard steel. The maximum feed value limit is smaller for softer steel types and larger for harder steel types.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rolling mill with adjustable strip head and tail thickness, comprising a housing (1), characterized in that, A sliding plate (3) is slidably connected to the inner wall of the outer shell (1). A clamping plate (6) is fixedly installed on the right side of the sliding plate (3). A scale (5) is fixedly installed on the right side of the outer shell (1). A rack (4) is fixedly installed on the inner wall of the outer shell (1). A gear (7) is rotatably connected to the front side of the sliding plate (3). The gear (7) meshes with the rack (4). A positioning mechanism and a control mechanism are respectively provided on the left side of the outer shell (1). The positioning mechanism cooperates with the gear (7) and the control mechanism respectively. A fixing plate (2) is fixedly installed on the bottom right side of the outer shell (1), and the fixing plate (2) slides in contact with the clamping plate (6); A strip steel measurement channel is formed between the fixing plate (2) and the clamping plate (6); The control mechanism includes a sliding plate (3), a positioning rod (8), a spring (9), a fixing rod (14), and a spring seat (16). A control frame (10) is fixedly installed on the left side of the sliding plate (3). The positioning rod (8) is slidably connected to the front side of the sliding plate (3). The positioning rod (8) is fixedly connected to the spring (9). The spring (9) is fixedly connected to the spring seat (16). The spring seat (16) is fixedly installed on the front side of the control frame (10). The positioning rod (8) is fixedly connected to the fixing rod (14). The positioning mechanism includes a control rod (11), a rotating wheel (12), a winch (13), and a telescopic rod (15). The control rod (11) is slidably connected to the front side of the control frame (10). The control rod (11) is fixedly connected to the winch (13). The winch (13) is wound around the rotating wheel (12). The rotating wheel (12) is rotatably connected to the front side of the control frame (10). The rotating wheel (12) is fixedly connected to the telescopic rod (15). The telescopic rod (15) is rotatably connected to the fixed rod (14). One end of the helical rope (13) is fixed to the control rod (11).

2. The rolling device for adjusting the head and tail thickness of strip in a rolling mill according to claim 1, characterized in that, A vertical groove is provided on the right side of the outer shell (1), and the outer side of the clamping plate (6) slides in contact with the inner wall of the vertical groove.

3. The rolling device for adjusting the head and tail thickness of strip in a rolling mill according to claim 1, characterized in that, The outer casing (1) has a control groove on its left side, and the outer side of the control frame (10) is slidably connected to the inner wall of the control groove.

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