A rolling mill adjustment device and its adjustment method

Abstract

This invention discloses a rolling mill adjustment device and method, relating to the field of bimetallic composite tube forming, to solve the problem that it is impossible to manually align the mandrel axis with the rolling centerline of the three rolls and guide plate in a three-roll skew rolling mill. The device includes: a mandrel passing through a support positioning device, the three-roll skew rolling mill, and another support positioning device, aligning the direction of the line connecting the support centers of the two support positioning devices, the mandrel axis, and the rolling centerline; the support positioning devices provide circumferential positioning and support height adjustment for the mandrel; a first distance measuring device is installed on the rolls, and a second distance measuring device is installed on the guide plate; the measurement paths of the first distance measuring device for each distance measuring the distance from the roll to the mandrel surface and the measurement paths of the second distance measuring device for each distance measuring the distance from the guide plate to the mandrel surface intersect with the mandrel axis; a controller is connected to the support positioning device, the first distance measuring device, the second distance measuring device, and the three-roll skew rolling mill to adjust the positions of the support positioning device, the rolls, and the guide plate.

Description

Technical Field

[0001] This invention relates to the field of bimetallic composite tube forming, and more specifically to a rolling mill adjustment device and its adjustment method. Background Technology

[0002] Three-roll skew rolling is an advanced metal rolling technology that uses three skewed rolls to continuously plastically deform metal billets, achieving diameter reduction, elongation, and forming. It is primarily used to produce metal products with specific geometries, such as hollow shafts and tubes. This technology offers advantages such as short rolling processes, low equipment investment, and high production efficiency, making it suitable for the industrial production of various types and specifications of tubes. Three-roll skew rolling technology has been gradually developed and applied to the fabrication of bimetallic composite tubes. The fabrication of bimetallic composite tubes often requires the use of guide plates to achieve spatial deformation and interface bonding. During the rolling process, the centerline of the three skewed rolls and three guide plates must be aligned with the axis of the mandrel to ensure uniform circumferential stress and consistent wall thickness in the composite tube.

[0003] Currently, traditional three-roll skew mills rely mainly on hydraulic systems for adjusting the roll diameter, making it difficult to position the rolls in space, accurately determine the rolling centerline, and achieve precise alignment of the roll and guide plate centerlines with the mandrel axis. Summary of the Invention

[0004] The purpose of this invention is to provide a rolling mill adjustment device and its adjustment method to ensure that the axis of the mandrel is collinear with the rolling center line of the three rolls, thereby improving the uniformity of circumferential deformation and the uniformity of the wall thickness of the composite tube during the rolling process.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] In a first aspect, the present invention provides a rolling mill adjustment device, comprising:

[0007] mandrel;

[0008] A three-roll skew mill has three rolls and three guide plates spaced apart, with the rolls and guide plates alternately distributed along the circumference.

[0009] Two support and positioning devices are respectively set on the input side and the output side of the three-roll skew mill. The mandrel passes through one of the support and positioning devices, the three-roll skew mill and the other support and positioning device in sequence, so that the line connecting the support centers of the two support and positioning devices, the axis of the mandrel and the rolling center line of the three-roll skew mill coincide. The two support and positioning devices are used for circumferential positioning of the mandrel and adjustment of the support height of the mandrel.

[0010] Three first measuring devices and three second measuring devices are provided. The three first measuring devices are respectively installed on the three rolls, and the three second measuring devices are respectively installed on the three guide plates. The measuring path direction of each first measuring device and the measuring path direction of each second measuring device intersect the axis direction of the mandrel. The first measuring devices are used to measure the distance L1 from the roll to the surface of the mandrel, and the second measuring devices are used to measure the distance S1 from the guide plate to the surface of the mandrel.

[0011] The controller is connected to the support positioning device, the first distance measuring device, the second distance measuring device, and the three-roll skew mill. The controller is used to control and adjust the working position of the support positioning device, the rolls, and the guide plate based on the detected distance information.

[0012] Optionally, in the above-mentioned mill adjustment equipment, the support positioning device includes:

[0013] A three-jaw chuck can contract or expand radially and is used to pass through and hold a mandrel.

[0014] The scissor lift platform can extend and retract vertically. The top of the scissor lift platform is connected to a three-jaw chuck, and the scissor lift platform is driven by the first drive mechanism. The scissor lift platform is used to adjust the support height of the mandrel by the three-jaw chuck.

[0015] Optionally, in the above-mentioned mill adjustment equipment, the three-jaw chuck includes a pneumatic chuck or a hydraulic chuck.

[0016] Optionally, in the above-mentioned mill adjustment equipment, the first drive mechanism includes a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0017] Optionally, the above-mentioned mill adjustment equipment also includes a second drive mechanism, the drive end of which is connected to the mandrel, and the second drive mechanism is used to drive the mandrel to move along its axial direction.

[0018] Optionally, in the above-mentioned mill adjustment equipment, the second drive mechanism further includes a Y-shaped bracket, which is used to support the mandrel.

[0019] Optionally, in the above-mentioned mill adjustment equipment, the first ranging device and the second ranging device have the same structure.

[0020] Optionally, in the above-mentioned mill adjustment equipment, the first ranging device includes a laser rangefinder, an electro-optical rangefinder, or an infrared rangefinder.

[0021] Compared with existing technologies, when using the above technical solution, the operator places two support positioning devices on the input and output sides of the three-roll skew mill, respectively. The controller controls the up-and-down movement of the two support positioning devices. When the line connecting the support centers of the two support positioning devices coincides with the axis of the mandrel, and the axis of the mandrel passes through the rolling space of the three-roll skew mill, the mandrel is then passed sequentially through one support positioning device, the three-roll skew mill, and the other support positioning device. The support positioning devices support and position the mandrel, and the controller controls the movement of these devices until the axis of the mandrel coincides with the rolling center line of the three-roll skew mill. At this point, three first distance measuring devices measure the distance L1 from the three rolls to the surface of the mandrel, and three second distance measuring devices measure the distance S1 from the guide plate to the surface of the mandrel. The controller then calculates the distance based on the measurements from each first distance measuring device. The controller controls the movement of three rolls according to the distance L1 measured by each second distance measuring device, so that the distances L1 from the three rolls to the mandrel are equal. Based on the distance S1 measured by each second distance measuring device, the controller controls the movement of three guide plates, so that the distances S1 from the guide plates to the mandrel surface are equal. Finally, the controller adjusts the target machining diameter of the three-roll skew mill according to the machining diameter of the workpiece, controls the support positioning device to release the mandrel, and moves the mandrel out of the three-roll skew mill and support positioning device along the line connecting the support centers. The mandrel can then be rolled using the three-roll skew mill. Compared to the traditional method of manually adjusting the roll and guide plate positions, this application, through the control connection between the controller and the support positioning device, the first distance measuring device, and the second distance measuring device, achieves accurate control and positioning adjustment of the mandrel's axis being collinear with the rolling center lines of the three rolls, thereby improving the uniformity of the workpiece's circumferential deformation during the three-roll skew mill rolling process.

[0022] Secondly, the present invention also provides an adjustment method for a rolling mill adjustment device, using the rolling mill adjustment device as described above, the method comprising the following steps:

[0023] S100, the controller controls the movement of two support positioning devices so that the line connecting the support centers of the two support positioning devices coincides with the axis of the mandrel in the predetermined position, wherein the axis of the mandrel in the predetermined position passes through the rolling space of the three-roll skew mill.

[0024] S200, the mandrel is passed through one of the support and positioning devices, the three-roll skew mill and another support and positioning device in sequence, and the mandrel is supported and positioned by the support and positioning device;

[0025] S300, the controller moves the support positioning device so that the axis of the mandrel coincides with the rolling center line of the three-roll skew mill:

[0026] S400, the distance L1 from the three rolls to the surface of the mandrel is measured by three first distance measuring devices, and the distance S1 from the guide plate to the surface of the mandrel is measured by three second distance measuring devices.

[0027] S500, the controller controls the movement of three rollers according to the distance L1 measured by each first ranging device, so that the distance L1 from the three rollers to the mandrel is equal. The controller controls the movement of three guide plates according to the distance S1 measured by each second ranging device, so that the distance S1 from the three guide plates to the surface of the mandrel is equal.

[0028] S600, the controller controls the movement of the three guide plates according to the distance S1 measured by each second ranging device, so that the distance S1 from the three guide plates to the surface of the mandrel is equal.

[0029] The S700 controller adjusts the target machining diameter of the three-roll skew mill according to the machining diameter of the workpiece, controls the support positioning device to release the mandrel, and moves the mandrel out of the three-roll skew mill and the support positioning device along the line connecting the support centers.

[0030] Optionally, in the adjustment method of the above-mentioned rolling mill adjustment equipment, the controller controls the movement of the two support positioning devices so that the line connecting the support centers of the two support positioning devices coincides with the axis of the mandrel in the predetermined position, including:

[0031] Obtain the distance X1 between the core rod at the predetermined position and the ground, and the radius r1 of the core rod;

[0032] Based on X1 and r1, the support height of the two support positioning devices on the mandrel is determined to be H = X1 + r1;

[0033] The controller moves the support positioning device according to the support height, so that the line connecting the support centers of the two support positioning devices coincides with the axis of the mandrel in the predetermined position.

[0034] Compared with the prior art, the beneficial effects of the adjustment method of the mill adjustment equipment provided by the present invention are the same as the beneficial effects of the mill adjustment equipment of the above-mentioned technical solution, and will not be repeated here. Attached Figure Description

[0035] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0036] Figure 1 This is a schematic diagram of the overall structure of a rolling mill adjustment device provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of a rolling mill adjustment device in operation, provided in an embodiment of the present invention;

[0038] Figure 3 for Figure 1Side view;

[0039] Figure 4 for Figure 1 AA direction diagram in the middle;

[0040] Figure 5 This is a schematic diagram of the structure of two support and positioning devices of a rolling mill adjustment device provided in an embodiment of the present invention;

[0041] Figure 6 for Figure 4 A magnified view of a section at point B in the middle;

[0042] Figure 7 for Figure 1 A schematic diagram of the structure in the CC direction before step S303;

[0043] Figure 8 for Figure 3 A schematic diagram of the structure in the DD direction.

[0044] Figure label:

[0045] 1-Mandrel; 2-Three-roll skew mill; 21-Roll; 22-Guide plate; 3-Support positioning device; 31-Three-jaw chuck; 32-Scissor lift platform; 321-Base; 322-Guide rail; 323-Telescopic rod; 324-X-type telescopic frame; 325-Placement plate; 4-First ranging device; 5-Second ranging device; 6-Second drive mechanism; 61-Y-type bracket. Detailed Implementation

[0046] To make the technical problems, solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0047] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0049] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] like Figures 1-8 As shown in the figure, an embodiment of the present invention provides a rolling mill adjustment device, including: a mandrel 1, a three-roll skew rolling mill 2, two support and positioning devices 3, a first distance measuring device 4, a second distance measuring device 5, and a controller.

[0052] The three-roll skew mill 2 has three rolls 21 spaced apart and three guide plates 22, with the rolls 21 and guide plates 22 alternately distributed along the circumferential direction. Two support positioning devices 3 are respectively set on the input and output sides of the three-roll skew mill 2. The mandrel 1 passes through one of the support positioning devices 3, the three-roll skew mill 2, and the other support positioning device 3 in sequence, so that the line connecting the support centers of the two support positioning devices 3, the axis of the mandrel 1, and the rolling center line of the three-roll skew mill 2 coincide. The two support positioning devices 3 are used for circumferential positioning of the mandrel 1 and adjustment of the support height of the mandrel 1. Three first distance measuring devices 4 are respectively installed on... Three rolls 21 and three second distance measuring devices 5 are respectively installed on three guide plates 22. The measurement path direction of each first distance measuring device 4 and the measurement path direction of each second distance measuring device 5 intersect with the axial direction of the mandrel 1. The first distance measuring device 4 is used to measure the distance L1 from the roll 21 to the surface of the mandrel 1, and the second distance measuring device 5 is used to measure the distance S1 from the guide plate 22 to the surface of the mandrel 1. The controller is connected to the support positioning device 3, the first distance measuring device 4, the second distance measuring device 5 and the three-roll skew mill 2. The controller is used to control and adjust the working position of the support positioning device 3, the rolls 21 and the guide plate 22 according to the detected distance information.

[0053] In specific implementation, such as Figure 1As shown, the operator places two support positioning devices 3 on the input and output sides of the three-roll skew mill 2, respectively. The controller moves the two support positioning devices 3 until the line connecting the support centers of the two support positioning devices 3 coincides with the axis of the mandrel 1. Since the axis of the mandrel 1 passes through the rolling space of the three-roll skew mill 2, the mandrel 1 is then passed sequentially through one support positioning device 3, the three-roll skew mill 2, and the other support positioning device 3. The support positioning devices 3 support and position the mandrel 1. The controller then moves the support positioning devices 3 until the axis of the mandrel 1 coincides with the rolling center line of the three-roll skew mill 2. At this point, three first distance measuring devices 4 measure the distance L1 from the three rolls 21 to the surface of the mandrel 1, and three second distance measuring devices 5 measure the distance S1 from the guide plate 22 to the surface of the mandrel 1. The controller controls the movement of the three... The rolls 21 move to make the distances L1 from the three rolls 21 to the mandrel 1 equal. Based on the distance S1 measured by each second measuring device 5, the three guide plates 22 are controlled to move to make the distances S1 from the three guide plates 22 to the surface of the mandrel 1 equal. Finally, the controller controls and adjusts the target machining diameter of the three-roll skew mill 2 according to the machining diameter of the workpiece to be processed, controls the support positioning device 3 to release the mandrel 1, and moves the mandrel 1 out of the three-roll skew mill 2 and the support positioning device 3 along the line connecting the support centers. The mandrel 1 can then be rolled through the three-roll skew mill 2. Compared with the traditional method of manually adjusting the position of the rolls 21 and the guide plates 22, this application achieves accurate control and positioning adjustment of the mandrel 1's axis being collinear with the rolling center lines of the three rolls through the control connection between the controller and the support positioning device 3, the first measuring device 4 and the second measuring device 5, so as to improve the uniformity of the circumferential deformation of the workpiece during the rolling process of the three-roll skew mill 2.

[0054] Specifically, in this embodiment, the support and positioning device 3 includes a three-jaw chuck 31 and a scissor lift platform 32. The three-jaw chuck 31 can retract or expand radially and is used to pass through and clamp the mandrel 1. The scissor lift platform 32 can extend and retract vertically. The top of the scissor lift platform 32 is connected to the three-jaw chuck 31. The scissor lift platform 32 is driven and connected to the first drive mechanism and is used to adjust the support height of the mandrel 1 by the three-jaw chuck 31.

[0055] like Figure 6As shown, the scissor lift platform 32 includes: a base 321, a guide rail 322, a telescopic rod 323, an X-shaped telescopic frame 324, and a shelf 325. The base 321 is provided with the guide rail 322. The X-shaped telescopic frame 324 has two opposing telescopic ends. One telescopic end is provided with a telescopic rod 323. By extending or shortening the telescopic rod 323, one telescopic end can slide along the guide rail 322. The telescopic rod 323 is driven and connected to the first drive mechanism. The other telescopic end is movably connected to the shelf 325. The shelf 325 is used to support and place the three-jaw chuck 31. The operator can first expand the three-jaw chuck 31 radially to pass through mandrels 1 of different diameters, and then pass one end of the mandrel 1 through the three-jaw chuck 31 on two adjacent support and positioning devices 3 in sequence. After placement, the three-jaw chuck 31 is then retracted radially to fix and clamp the mandrel 1. At this time, the first drive mechanism is activated to drive the scissor lift platform 32 to rise vertically. During this process, the first drive mechanism drives the telescopic rod 323 to retract, causing one of the telescopic ends of the X-shaped telescopic frame 324 to slide along the guide rail 322. The shelf 325 rises continuously vertically, causing the three-jaw chuck 31 to move the mandrel 1 upwards along the vertical direction until it reaches the support height for the mandrel 1. The mandrel 1's axis must coincide with the rolling centerline of the three-roll skew mill 2. After the rolling task is completed, the operator expands the three-jaw chuck 31 radially to release the mandrel 1, removing it from the three-jaw chuck 31 on the two adjacent support positioning devices 3. At this time, the first drive mechanism is activated to drive the scissor lift platform 32 to descend vertically. During this process, the first drive mechanism drives the telescopic rod 323 to extend, causing one of the telescopic ends of the X-shaped telescopic frame 324 to slide along the guide rail 322. The placement plate 325 descends vertically, causing the scissor lift platform 32 to retract and return to its initial position, thus completing the storage of the support positioning device 3 for convenient operation.

[0056] In other embodiments, both the first drive mechanism and the three-jaw chuck 31 are connected to a controller. In the fabrication of bimetallic composite tubes, wall thickness uniformity is a key indicator for evaluating their overall performance. Improving the adjustment accuracy of the rolls and guide plates is particularly important. Simultaneously, due to the gap in the pressing device, the diameter of the target product usually needs to be slightly smaller than the die size. Compared to traditional methods that rely on manual experience and result in low adjustment efficiency and a degree of randomness, this application allows operators to automatically control and adjust the first drive mechanism and the radial contraction or expansion of the three-jaw chuck 31 via the controller during operation. This ensures accurate adjustment of the die size held by the three-jaw chuck 31 over the target product, facilitating operation and improving the uniformity of the wall thickness processed by the mill adjustment equipment.

[0057] Specifically, in this embodiment, the three-jaw chuck 31 includes a pneumatic chuck or a hydraulic chuck. The pneumatic chuck is driven by air pressure, and the hydraulic chuck is driven by hydraulic pressure. Compared with manual chucks, both pneumatic and hydraulic chucks have the advantages of rapid clamping, convenient installation, large clamping force, and stable reliability, which improves the clamping efficiency of the mandrel 1. Of course, the three-jaw chuck 31 can also use other chuck structures to clamp and fix the mandrel 1. The three-jaw chuck 31 is not limited to the chuck structures listed in this embodiment.

[0058] Specifically, in this embodiment, the first drive mechanism includes a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. When the weight of the three-jaw chuck 31 and mandrel 1 supported by the scissor lift platform 32 is large, the force required from the first drive mechanism also increases. The hydraulic cylinder uses a hydraulic system, which can provide the first drive mechanism with the power necessary for normal operation. The hydraulic cylinder has smooth transmission and a compact structure. The pneumatic cylinder has a small volume and uses air in the pipeline, saving the cost of purchasing, storing, and transporting the medium. The air can be reused, and the flow resistance and pressure loss in the pipeline are small. The electric cylinder has low noise and can achieve rapid response through programmable control, and has energy-saving and environmental protection features. The first drive mechanism is not limited to the drive mechanisms listed in this embodiment. Other drive mechanisms with driving functions can also be used, which facilitates accurate control and adjustment of the first drive mechanism through the controller, saving the operating cost of the rolling mill adjustment equipment.

[0059] like Figure 1 and Figure 2 As shown, specifically in this embodiment, the mill adjustment equipment further includes a second drive mechanism 6. The drive end of the second drive mechanism 6 is connected to the mandrel 1, and the second drive mechanism 6 is used to drive the mandrel 1 to move along its axial direction. The second drive mechanism 6 can employ a screw drive, motor drive, hydraulic drive, or pneumatic drive, or other drive methods, as long as the drive end of the second drive mechanism 6 can drive the mandrel 1 to move along its axial direction. Furthermore, compared to the traditional method of manually pushing and placing the mandrel 1, the second drive mechanism 6 can also be connected to a controller, allowing the controller to accurately control and adjust the movement of the second drive mechanism 6 according to the axial position of the mandrel 1. This improves the response speed of the second drive mechanism 6, facilitates the adjustment and control of its movement, and saves labor costs.

[0060] like Figure 7As shown, specifically in this embodiment, the second driving mechanism 6 further includes a Y-shaped bracket 61, which is used to support the mandrel 1. The Y-shaped bracket 61 can withstand a large load and has good stability. The Y-shaped bracket 61 can be arranged at intervals of 2, 3, 5, etc. along the axial direction of the mandrel 1. Of course, U-shaped brackets or other shapes of brackets can also be used, as long as the Y-shaped bracket 61 can stably support the mandrel 1, so that the mandrel 1 can be placed relatively stably during the movement of the mandrel 1 driven by the second driving mechanism 6.

[0061] Specifically, in this embodiment, the first ranging device 4 and the second ranging device 5 have the same structure, which facilitates installation and disassembly and reduces the usage cost of the first ranging device 4 and the second ranging device 5.

[0062] Specifically, in this embodiment, the first ranging device 4 includes a laser rangefinder, an electro-optical rangefinder, or an infrared rangefinder. Laser rangefinders, electro-optical rangefinders, and infrared rangefinders all feature high precision, high speed, and good stability. During measurement, the laser rangefinder primarily measures distance by the speed of light propagation; the electro-optical rangefinder indirectly measures distance by measuring the time required for electromagnetic waves to travel back and forth across the distance to be measured; and the infrared rangefinder measures distance by measuring the time it takes for infrared light to travel from emission to reception and the speed of infrared propagation. Of course, the first ranging device 4 is not limited to the measuring devices listed in this embodiment. It can also employ an ultrasonic distance sensor or other devices with distance measurement capabilities, thereby improving the accuracy of distance measurements for the distance L1 from the surface of the roll 21 to the surface of the mandrel 1 and the distance S1 from the surface of the guide plate 22 to the surface of the mandrel 1.

[0063] Meanwhile, the present invention also provides an adjustment method for a rolling mill adjustment device, using the rolling mill adjustment device described above, the method comprising the following steps:

[0064] In step S100, the controller controls the two support positioning devices 3 to move so that the line connecting the support centers of the two support positioning devices 3 coincides with the axis of the mandrel 1 in the predetermined position, wherein the axis of the mandrel 1 in the predetermined position passes through the rolling space of the three-roll skew mill 2.

[0065] Step S200: The mandrel 1 is passed through one of the support and positioning devices 3, the three-roll skew mill 2 and the other support and positioning device 3 in sequence, and the mandrel 1 is supported and positioned by the support and positioning device 3.

[0066] In step S300, the controller controls the support positioning device 3 to move so that the axis of the mandrel 1 coincides with the rolling center line of the three-roll skew mill 2.

[0067] In step S400, the distance L1 from the three rolls 21 to the surface of the mandrel 1 is measured by the three first distance measuring devices 4, and the distance S1 from the guide plate 22 to the surface of the mandrel 1 is measured by the three second distance measuring devices 5.

[0068] In step S500, the controller controls the movement of the three rollers 21 according to the distance L1 measured by each first ranging device 4, so that the distance L1 from the three rollers 21 to the mandrel 1 is equal. The controller also controls the movement of the three guide plates 22 according to the distance S1 measured by each second ranging device 5, so that the distance S1 from the three guide plates 22 to the surface of the mandrel 1 is equal.

[0069] like Figure 8 As shown, after the first ranging device 4 and the second ranging device 5 are installed, the distances L2 and S2 are known fixed values. Combining the measured distances L1 and S1, the target wall thickness of the workpiece to be processed, L = L1 - L2, and the target size simulated by the guide plate 22, S = S1 - S2, can be calculated. The controller controls the position movement of the three guide plates 22 and the three rolls 21 according to the distance information measured by the first ranging device 4 and the second ranging device 5, ensuring that the distances L1 from the three rolls 21 to the mandrel 1 are equal and the distances S1 from the three guide plates 22 to the surface of the mandrel 1 are equal. This avoids the risk of stress concentration and tearing of the workpiece due to unequal distances between adjacent rolls 21, and improves the reliability of the adjustment method of the mill adjustment equipment. Compared with the traditional manual adjustment to determine the rolling center line, the adjustment method provided in this application can meet the adjustment requirements of mandrels 1 with different diameters, while ensuring the thickness uniformity and continuity of the workpiece to be processed, and improving the dimensional accuracy of the processed workpiece.

[0070] In step S600, the controller adjusts the target machining diameter of the three-roll skew mill 2 according to the machining diameter of the workpiece to be processed, and controls the support positioning device 3 to release the mandrel 1, and moves the mandrel 1 out of the three-roll skew mill 2 and the support positioning device 3 along the line connecting the support centers.

[0071] Specifically, in the adjustment method of the above-mentioned rolling mill adjustment equipment, the controller controls the movement of the two support positioning devices 3 so that the line connecting the support centers of the two support positioning devices 3 coincides with the axis of the mandrel 1 in the predetermined position, including:

[0072] Step S301: Obtain the distance X1 between the core rod 1 at the predetermined position and the ground, and the radius r1 of the core rod 1;

[0073] like Figure 7As shown, during operation, the mandrel 1 is first fixed on the Y-shaped bracket 61 on the second drive mechanism 6. At this time, the mandrel 1 is in a predetermined position. The controller obtains the distance X1 between the mandrel 1 and the ground and the radius r1 of the mandrel 1 in this state. In some embodiments, the controller can control the movement of the second drive mechanism 6 based on the obtained distance X1 and radius r1 information, thereby driving the second drive mechanism 6 to adjust the predetermined position of the mandrel 1 until the position of the mandrel 1 meets the working requirements.

[0074] Step S302: Determine the support height of the two support positioning devices 3 on the core rod 1 as H = X1 + r1 based on X1 and r1;

[0075] like Figure 7 As shown, the support height H of the mandrel 1 is the vertical distance from the center point of the mandrel 1 to the ground.

[0076] In step S303, the controller controls the movement of the support positioning device 3 according to the support height, so that the line connecting the support centers of the two support positioning devices 3 coincides with the axis of the mandrel 1 in the predetermined position.

[0077] Compared to the traditional method of manually adjusting and determining the fixed position of the mandrel 1, the adjustment method of this application realizes automatic control and adjustment of the support positioning device 3 through a controller, which avoids the risk of the mandrel 1's axis position deviating from the rolling center line during the movement, thus improving the processing quality and accuracy of the rolled workpiece.

[0078] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0079] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A rolling mill adjustment device, characterized in that, include: mandrel; A three-roll skew mill has three rolls and three guide plates spaced apart, and the rolls and guide plates are alternately distributed along the circumferential direction. Two support and positioning devices are respectively installed on the input side and the output side of the three-roll skew mill. The mandrel passes through one of the support and positioning devices, the three-roll skew mill, and the other support and positioning device in sequence, such that the line connecting the support centers of the two support and positioning devices, the axis of the mandrel, and the rolling center line of the three-roll skew mill coincide. The two support and positioning devices are used for circumferential positioning of the mandrel and adjustment of the support height of the mandrel. Three first ranging devices and three second ranging devices are provided. The three first ranging devices are respectively installed on the three rolls, and the three second ranging devices are respectively installed on the three guide plates. The measurement path direction of each first ranging device and the measurement path direction of each second ranging device intersect the axial direction of the mandrel. The first ranging devices are used to measure the distance L1 from the roll to the surface of the mandrel, and the second ranging devices are used to measure the distance S1 from the guide plate to the surface of the mandrel. The controller is connected to the support positioning device, the first distance measuring device, the second distance measuring device, and the three-roll skew mill. The controller is used to control and adjust the working positions of the support positioning device, the rolls, and the guide plate according to the detected distance information.

2. The mill adjustment equipment according to claim 1, characterized in that, The support and positioning device includes: A three-jaw chuck, capable of contracting or expanding radially, is used to pass through and clamp the mandrel. The scissor lift platform is capable of extending and retracting vertically. The top of the scissor lift platform is connected to the three-jaw chuck, and the scissor lift platform is driven by a first drive mechanism. The scissor lift platform is used to adjust the support height of the three-jaw chuck on the mandrel.

3. The mill adjustment equipment according to claim 2, characterized in that, The three-jaw chuck includes a pneumatic chuck or a hydraulic chuck.

4. The mill adjustment equipment according to claim 2, characterized in that, The first driving mechanism includes a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

5. The mill adjustment equipment according to claim 1, characterized in that, It also includes a second drive mechanism, the drive end of which is connected to the mandrel, and the second drive mechanism is used to drive the mandrel to move along its axial direction.

6. The mill adjustment equipment according to claim 5, characterized in that, The second drive mechanism also includes a Y-shaped bracket, which is used to support the mandrel.

7. The mill adjustment equipment according to claim 1, characterized in that, The first ranging device and the second ranging device have the same structure.

8. The mill adjustment equipment according to claim 7, characterized in that, The first ranging device includes a laser rangefinder, an optical rangefinder, or an infrared rangefinder.

9. A method for adjusting a rolling mill adjustment device, using the rolling mill adjustment device as described in any one of claims 1-8, characterized in that, The method includes the following steps: S100, the controller controls the two support positioning devices to move, such that the line connecting the support centers of the two support positioning devices coincides with the axis of the mandrel in the predetermined position, wherein the axis of the mandrel in the predetermined position passes through the rolling space of the three-roll skew mill. S200, the mandrel is passed sequentially through one of the support and positioning devices, the three-roll skew mill and the other support and positioning device, and the mandrel is supported and positioned by the support and positioning devices; S300, the controller controls the movement of the support positioning device so that the axis of the mandrel coincides with the rolling center line of the three-roll skew mill; S400, the distance L1 from the three rolls to the surface of the mandrel is measured by the three first distance measuring devices respectively, and the distance S1 from the guide plate to the surface of the mandrel is measured by the three second distance measuring devices respectively; S500, the controller controls the movement of the three rollers according to the distance L1 measured by each of the first ranging devices, so that the distance L1 from the three rollers to the mandrel is equal; the controller controls the movement of the three guide plates according to the distance S1 measured by each of the second ranging devices, so that the distance S1 from the three guide plates to the surface of the mandrel is equal. S600, the controller controls and adjusts the target machining diameter of the three-roll skew mill according to the machining diameter of the workpiece to be processed, controls the support positioning device to release the mandrel, and moves the mandrel out of the three-roll skew mill and the support positioning device along the line connecting the support centers.

10. The adjustment method for the rolling mill adjustment equipment according to claim 9, characterized in that, The controller controls the movement of the two support positioning devices so that the line connecting the support centers of the two support positioning devices coincides with the axis of the mandrel at the predetermined position, including: Obtain the distance X1 between the core rod at the predetermined position and the ground, and the radius r1 of the core rod; Based on X1 and r1, the support height of the two support positioning devices on the mandrel is determined to be H = X1 + r1; The controller controls the movement of the support positioning device according to the support height, so that the line connecting the support centers of the two support positioning devices coincides with the axis of the mandrel in the predetermined position.

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