Straightening machine working roll adjusting device capable of adjusting convexity

Abstract

The invention belongs to the technical field of straightening machine working roller adjustment, and particularly relates to a convexity-adjustable straightening machine working roller adjusting device which comprises a working roller assembly installed in a straightening machine frame, the working roller assembly comprises an upper working roller and a lower working roller, a plurality of sets of supporting assemblies are arranged above the upper working roller, and a plurality of sets of supporting assemblies are arranged above the lower working roller. A transmission assembly is arranged above the multiple sets of supporting assemblies and makes contact with the supporting assemblies, and a driving assembly is arranged on one side of the transmission assembly. Sectional type downward pressing of the supporting rollers can be achieved, pressure can be applied in a targeted mode according to the actual conditions of different parts of a plate, the device better adapts to the complex shape of steel, and therefore the straightening precision is improved, the upper working rollers are subjected to sectional downward pressing through the supporting rollers, the downward pressing amount of each section of the upper working rollers on the steel can be accurately controlled, and the straightening precision is improved. Accurate control over the steel deformation is achieved, and the production requirement is better met.

Description

Technical Field

[0001] The invention belongs to the technical field of straightening machine working roll adjustment, and in particular relates to a straightening machine working roll adjustment device with adjustable crown. Background Art

[0002] In the field of metal processing, many metal materials and products often bend or twist during rolling, forging, extrusion, drawing, transportation, cooling, and various other processing processes due to external forces, temperature changes, and internal force fluctuations. In these cases, a straightening process is required to restore them to an ideal straight state. A straightening machine is key equipment for this process, and its performance is directly related to the quality of the material surface and the flatness of the entire plate. The straightening machine directly contacts the material through the work rolls. The backup rolls are mainly used to support the work rolls, withstand the rolling force and bending moment to which the work rolls are subjected during the straightening process, and prevent the work rolls from excessive deformation under the pressure, thereby ensuring the normal operation of the work rolls and the straightening accuracy.

[0003] Currently, when adjusting the crown of the working rolls, wedge blocks and hydraulic systems are often used to adjust the crown. When adjusting the crown using the wedge blocks and hydraulic systems, the pressure on the support rolls at different positions along the length direction will vary due to the action of the wedge blocks. On the side pushed by the wedge blocks, the support rolls are subjected to greater pressure. As the position of the wedge blocks changes, the pressure gradually decreases toward the other side, resulting in an uneven distribution along the length direction. This uneven pressure distribution will cause the support force of the support rolls on the plate to change accordingly, affecting the straightening effect to a certain extent. In addition, this method can only adjust the crown of an entire row of support rolls at the same time, and cannot adjust the support rolls individually. Since the crown of the support rolls cannot be adjusted individually, it is difficult to make precise adjustments to complex plate defects, affecting the flatness of the product. Summary of the Invention

[0004] In view of the above problems, the present invention provides a crown-adjustable working roll adjusting device for a straightening machine.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: A straightening machine working roll adjustment device with adjustable crown includes a working roll assembly installed inside a straightening machine frame, the working roll assembly includes an upper working roll and a lower working roll, the upper working roll is located above the lower working roll, a straightening plate is arranged between the upper working roll and the lower working roll, a plurality of support assemblies are arranged above the upper working roll, the support assemblies are in contact with the upper working roll, a transmission assembly is arranged above the plurality of support assemblies, the transmission assembly is in contact with the support assembly and is used to adjust the lifting and lowering of the support assembly, a drive assembly is arranged on one side of the transmission assembly, and the drive assembly is used to drive the transmission assembly to move.

[0006] Furthermore, the support assembly includes two fixed frames arranged symmetrically on the left and right, the fixed frames are fixedly connected to the straightening frame, a reset assembly is arranged in the fixed frame, and a support roller is rotatably installed between the two groups of the reset assemblies, and the support roller is in contact with the upper working roller.

[0007] Furthermore, the reset assembly includes a mounting groove opened in the middle of the fixed frame, a lifting block is slidably arranged inside the mounting groove, the support roller is rotatably connected to the lifting block, two guide rods are symmetrically arranged inside the mounting groove, a through hole corresponding to the guide rod is opened on the lifting block, a lifting spring is sleeved on the guide rod, and the lifting spring is located between the upper surface of the lifting block and the top wall of the mounting groove.

[0008] Furthermore, the transmission assembly includes a rotating shaft, both ends of which are fixedly connected to the straightening frame through mounting seats, and a plurality of driving cams are rotatably mounted on the rotating shaft, the number of the driving cams being the same as the number of support assemblies above the upper working roll, one end of the driving cam being in contact with the corresponding support roll, and the other end of the driving cam being provided with teeth, and the driving cam being transmission-connected to the driving assembly through the teeth.

[0009] Furthermore, the driving assembly includes a top plate fixedly mounted on the straightening frame, a plurality of telescopic cylinders fixedly mounted on the top plate, the telescopic ends of the telescopic cylinders fixedly connected to a driving tooth plate, and the driving tooth plate meshes with the teeth on the corresponding driving cam.

[0010] Compared with the prior art, the present invention has the following advantages: The present invention can realize the segmented downward pressure of the support roller, and can apply pressure in a targeted manner according to the actual conditions of different parts of the plate, better adapt to the complex shape of the steel, thereby improving the straightening accuracy. The support roller performs segmented downward pressure on the upper working roller, and can accurately control the downward pressure of each segment of the upper working roller on the steel, thereby achieving precise control of the deformation of the steel and better meeting production requirements. The segmented downward pressure can also make the pressure distribution more targeted, which is convenient for ensuring the straightening effect. The segmented downward pressure of the present invention can make the contact between the steel surface and the upper working roll more uniform, reduce local friction, thereby reducing the possibility of surface scratches, improving the surface quality of the steel, and can disperse pressure to avoid the phenomenon of local stress concentration on the steel surface, effectively reducing surface stress concentration, improving the surface quality and reliability of the steel, extending the service life of the upper working roll, reducing fatigue damage, improving production efficiency, increasing process flexibility, and conveniently adapting to the straightening needs of steels of different specifications and materials.

[0011] The present invention can adjust the crown of a single support roller and can accurately adjust for different plate shape defects, so that the flatness of the plate can be effectively controlled and the product quality can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the three-dimensional structure of Example 1 of the present invention; Figure 2 Schematic diagram of the position distribution of the driving cam in Example 1 of the present invention; Figure 3 This is a front view of Example 1 of the present invention; Figure 4 A top view of Example 1 of the present invention; Figure 5 For the present invention Figure 1 A partial enlarged view of the middle circle A; Figure 6 Schematic diagram of the relative position distribution of the upper working roll, the lower working roll and the backup roll in Example 1 of the present invention; Figure 7 Schematic diagram of the three-dimensional structure of embodiment 2 of the present invention; Figure 8 Schematic diagram of the position distribution of the driving cam in Example 2 of the present invention; Figure 9 For the present invention Figure 7 A partial enlarged view of the middle circle B; In the figure, top plate 1, telescopic cylinder 2, driving gear plate 3, mounting seat 4, rotating shaft 5, driving cam 6, upper working roller 7, lower working roller 8, fixing frame 9, mounting groove 10, lifting block 11, guide rod 12, pulling spring 13, supporting roller 14, straightening plate 15. DETAILED DESCRIPTION

[0013] In order to further illustrate the technical solution of the present invention, the present invention is further described below through examples. Example 1

[0014] like Figures 1 to 6 As shown, a straightening machine working roll adjustment device with adjustable crown includes a working roll assembly installed inside the straightening machine frame, the working roll assembly includes an upper working roll 7 and a lower working roll 8, the upper working roll 7 is located above the lower working roll 8, a straightening plate 15 is arranged between the upper working roll 7 and the lower working roll 8, a plurality of groups of support assemblies are arranged above the upper working roll 7, the support assemblies are in contact with the upper working roll 7, a transmission assembly is arranged above the plurality of groups of support assemblies, the transmission assembly is in contact with the support assembly, and is used to adjust the lifting and lowering of the support assembly, a drive assembly is provided on one side of the transmission assembly, and the drive assembly is used to drive the transmission assembly to move.

[0015] The support assembly includes two fixed frames 9 arranged symmetrically on the left and right, and the fixed frames 9 are fixedly connected to the straightening frame. A reset assembly is arranged in the fixed frame 9, and a support roller 14 is rotatably installed between the two groups of the reset assemblies. The support roller 14 is in contact with the upper working roller 7.

[0016] The reset assembly includes a mounting groove 10 opened in the middle of the fixing frame 9, a lifting block 11 is slidably arranged inside the mounting groove 10, the support roller 14 is rotatably connected to the lifting block 11, two guide rods 12 are symmetrically arranged inside the mounting groove 10, a through hole corresponding to the guide rod 12 is opened on the lifting block 11, a lifting spring 13 is sleeved on the guide rod 12, and the lifting spring 13 is located between the upper surface of the lifting block 11 and the top wall of the mounting groove 10.

[0017] The transmission assembly includes a rotating shaft 5, both ends of which are fixedly connected to the straightening frame through a mounting seat 4. A plurality of driving cams 6 are rotatably mounted on the rotating shaft 5. The number of the driving cams 6 is the same as the number of the support assemblies above the upper working roll 7. One end of the driving cam 6 is in contact with the corresponding support roll 14, and the other end of the driving cam 6 is provided with teeth. The driving cam 6 is transmission-connected to the driving assembly through the teeth.

[0018] The driving assembly includes a top plate 1 fixedly mounted on the straightening frame, a plurality of telescopic cylinders 2 fixedly mounted on the top plate 1, the telescopic ends of the telescopic cylinders 2 fixedly connected to a driving tooth plate 3, the driving tooth plate 3 is a single-sided tooth plate, and the driving tooth plate 3 is engaged with the teeth on the corresponding driving cam 6. Example 2

[0019] like Figures 7 and 8 As shown, in this embodiment, the driving tooth plate 3 is a double-sided tooth plate, and the driving tooth plate 3 engages with the teeth on the driving cams 6 on the adjacent two sides, so as to simultaneously drive the two adjacent driving cams 6 on the same rolling line to move, thereby realizing synchronous adjustment of the same position of the two adjacent upper working rollers 7.

[0020] Working principle: When in use, the present invention drives the tooth plate 3 to move up and down through the extension and contraction of the telescopic cylinder 2. Since the teeth at the end of the driving tooth plate 3 and the driving cam 6 are engaged, the driving cam 6 is driven to rotate on the rotating shaft 5. When the driving cam 6 rotates so that its own end approaches the support roller 14, the driving cam 6 applies pressure to the support roller 14, so that the convexity of the upper working roller 7 pushed by the support roller 14 changes. During this process, the lifting block 11 follows the support roller 14 to move, and the lifting block 11 slides on the fixed vertical rod 12. When the driving cam 6 moves away from the support roller 14, the pulling spring 13 drives the lifting block 11 to reset.

[0021] When the present invention is used, it needs to be used in conjunction with a suitable hydraulic pump station, control valve group, sensor and electrical control system. The hydraulic pump station provides a power source for the telescopic cylinder 2, and includes components such as an oil pump, a motor, an oil tank, and an overflow valve. The oil pump, driven by the motor, pressurizes the hydraulic oil in the oil tank and delivers it to the telescopic cylinder 2. The overflow valve is used to adjust and stabilize the system pressure; the control valve group includes a directional control valve, a flow control valve and a pressure control valve, etc. The directional control valve is used to control the flow direction of the hydraulic oil, thereby realizing the extension, retraction and stop of the telescopic cylinder 2. The flow control valve can adjust the flow of hydraulic oil entering the telescopic cylinder 2, thereby controlling the movement speed of the telescopic cylinder 2. The pressure control valve is used to limit the maximum pressure of the system to protect the safety of the equipment. Sensors can choose displacement sensors, pressure sensors, etc. The displacement sensor The telescopic cylinder 2 is used to monitor its telescopic position in real time and feed back position signals to the electrical control system for precise positioning control. The pressure sensor monitors pressure changes in the hydraulic system, providing a basis for safe system operation and fault diagnosis. The electrical control system receives feedback signals from the sensor and controls the operation of the hydraulic pump station and control valve group according to preset programs and instructions, achieving automated positioning and extension control of the telescopic cylinder 2. Components such as a PLC, relays, and controllers can be selected. When the telescopic cylinder 2 is operating, the hydraulic pump draws oil from the tank and pressurizes it, delivering the high-pressure hydraulic oil to the telescopic cylinder 2 through a pipeline. When the directional control valve is switched to the extend position, the hydraulic oil enters the rodless chamber of the telescopic cylinder 2, pushing the piston and piston rod to extend. The hydraulic oil in the rod chamber flows back to the tank through the directional control valve. Conversely, when the directional control valve is switched to the retract position, the hydraulic oil enters the rod chamber, retracting the piston rod. By controlling the flow rate and pressure of the hydraulic oil, the extension speed and force of the telescopic cylinder 2 can be adjusted. The displacement sensor monitors the position of the piston rod in real time and transmits signals to the electrical control system. When the piston rod approaches the preset position, the electrical control system gradually adjusts the flow and pressure of the hydraulic system according to the feedback signal, so that the telescopic cylinder 2 slows down and stops accurately at the target position. After the telescopic cylinder 2 reaches the precise position, the mechanical positioning device locks the telescopic cylinder 2 in this position by inserting into the positioning hole or cooperating with the positioning block to prevent position deviation due to external force or hydraulic system leakage. The pressure sensor monitors the hydraulic system pressure. When the pressure exceeds the set value, the overflow valve opens and the excess hydraulic oil flows back to the tank to protect the system safety. During the operation of the telescopic cylinder 2, the electrical control system can determine whether the telescopic cylinder 2 encounters overload or other abnormal conditions based on the signal of the pressure sensor, and take corresponding protective measures, such as stopping the telescopic action or issuing an alarm signal.

[0022] The foregoing shows and describes the principal features and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations that come within the meaning and range of equivalents of the claims are intended to be embraced therein.

[0023] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A crown-adjustable working roll adjustment device for a straightening machine, comprising a working roll assembly mounted inside a straightening machine frame, wherein the working roll assembly comprises an upper working roll (7) and a lower working roll (8), wherein the upper working roll (7) is located above the lower working roll (8), and a straightening plate (15) is arranged between the upper working roll (7) and the lower working roll (8), wherein the device is characterized in that: A plurality of support assemblies are provided above the upper working roll (7), the support assemblies being in contact with the upper working roll (7), a transmission assembly is provided above the plurality of support assemblies, the transmission assembly being in contact with the support assemblies and being used to adjust the lifting and lowering of the support assemblies, and a drive assembly is provided on one side of the transmission assembly, the drive assembly being used to drive the transmission assembly to move.

2. The crown-adjustable working roll adjustment device for a straightening machine according to claim 1, characterized in that: The support assembly comprises two fixed frames (9) symmetrically arranged on the left and right, the fixed frames (9) being fixedly connected to the straightening frame, a reset assembly being arranged in the fixed frames (9), a support roller (14) being rotatably mounted between the two groups of the reset assemblies, and the support roller (14) being in contact with the upper working roller (7).

3. The crown-adjustable working roll adjustment device for a straightening machine according to claim 2, characterized in that: The reset assembly includes a mounting groove (10) provided in the middle of the fixing frame (9), a lifting block (11) is slidably provided inside the mounting groove (10), the support roller (14) is rotatably connected to the lifting block (11), two guide rods (12) are symmetrically provided inside the mounting groove (10), a through hole corresponding to the guide rod (12) is provided on the lifting block (11), a lifting spring (13) is sleeved on the guide rod (12), and the lifting spring (13) is located between the upper surface of the lifting block (11) and the top wall of the mounting groove (10).

4. The crown-adjustable working roll adjustment device for a straightening machine according to claim 2, characterized in that: The transmission assembly comprises a rotating shaft (5), both ends of which are fixedly connected to the straightening frame via a mounting seat (4), and a plurality of driving cams (6) are rotatably mounted on the rotating shaft (5), the number of the driving cams (6) being the same as the number of the supporting assemblies above the upper working roller (7), one end of the driving cam (6) being in contact with the corresponding supporting roller (14), and the other end of the driving cam (6) being provided with teeth, and the driving cam (6) being transmission-connected to the driving assembly via the teeth.

5. The crown-adjustable working roll adjusting device for a straightening machine according to claim 4, characterized in that: The driving assembly comprises a top plate (1) fixedly mounted on a straightening frame, a plurality of telescopic cylinders (2) fixedly mounted on the top plate (1), the telescopic ends of the telescopic cylinders (2) fixedly connected to driving tooth plates (3), and the driving tooth plates (3) meshing with teeth on corresponding driving cams (6).

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