Rolling mill adjusting equipment and adjusting method thereof

Abstract

The invention discloses rolling mill adjusting equipment and an adjusting method thereof, relates to the field of bimetal composite pipe forming, and aims to solve the problem that the axis of a mandril of a three-roller skew rolling mill cannot be kept consistent with the rolling center lines of three rollers and a guide plate manually. According to the equipment, a core rod penetrates through one supporting and positioning device, a three-roller skew rolling mill and the other supporting and positioning device, so that the connecting line direction of the supporting centers of the two supporting and positioning devices, the axis of the core rod and the rolling center line coincide, and the supporting and positioning devices conduct circumferential positioning and supporting height adjustment on the core rod; the first distance measuring devices are installed on the rollers, the second distance measuring devices are installed on the guide plates, and the measuring path of each first distance measuring device for measuring the distance between the rollers and the surface of the core rod and the measuring path of each second distance measuring device for measuring the distance between the guide plates and the surface of the core rod intersect with the axial direction of the core rod. The controller is in control connection with the supporting and positioning device, the first distance measuring device, the second distance measuring device and the three-roller skew rolling mill and adjusts the positions of the supporting and positioning device, the rollers and the guide plate.

Description

Technical Field

[0001] The invention relates to the field of bimetallic composite tube forming, and in particular to a rolling mill adjustment device and an adjustment method thereof. Background Art

[0002] Three-roller cross-rolling technology is an advanced metal material rolling technology. Through three cross-rolling rollers, the metal blank is continuously plastically deformed to achieve material diameter reduction, extension and forming. It is mainly used to produce metal products with specific geometric shapes, such as hollow shafts, pipes, etc. This technology has the advantages of short rolling process, low equipment investment, and high production efficiency. It is suitable for industrial production of multiple varieties and specifications of pipes. Three-roller cross-rolling technology has been gradually developed and applied to the preparation of bimetallic composite pipes. The preparation of bimetallic composite pipes often requires the use of guide plates to achieve spatial deformation and interface bonding. During the rolling process, the center line of the three cross-rolling rollers and the three guide plates around the circumference must be consistent with the axis of the mandrel to ensure uniform circumferential force and consistent wall thickness of the composite pipe.

[0003] At present, the traditional three-roller oblique rolling mill mainly relies on the hydraulic system to adjust the hole diameter, which makes the spatial positioning of the rolls difficult, and the rolling center line cannot be accurately determined, making it difficult to achieve precise coincidence of the center line of the rolls and guide plates with the axis of the mandrel. Summary of the invention

[0004] The object of the present invention is to provide a rolling mill adjustment device and an adjustment method thereof, which are used to ensure that the axis of the mandrel is colinear with the rolling center lines of the three rollers, thereby improving the uniformity of circumferential deformation and the uniformity of wall thickness of the composite pipe during rolling.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

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

[0007] Mandrel;

[0008] The three-roller cross-rolling mill has three rolls and three guide plates arranged at intervals, and the rolls and guide plates are alternately distributed in the circumferential direction;

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

[0010] Three first distance measuring devices and three second distance measuring devices, the three first distance measuring devices are respectively installed on the three rollers, and the three second distance measuring devices are respectively installed on the three guide plates, the measuring path direction of each first distance measuring device and the measuring path direction of each second distance measuring device intersect with the axis direction of the mandrel, the first distance measuring device is used to measure the distance L1 from the roller to the surface of the mandrel, and the second distance measuring device is used to measure the distance S1 from the guide plate to the surface of the mandrel;

[0011] A controller is connected to the support positioning device, the first distance measuring device, the second distance measuring device and the three-roller inclined rolling mill, and is used to control and adjust the working positions of the support positioning device, the rolling rollers and the guide plates according to the detected distance information.

[0012] Optionally, in the above rolling mill adjustment device, the supporting positioning device comprises:

[0013] A three-jaw chuck, which can be contracted or expanded radially, is used to pass and clamp the mandrel;

[0014] The scissor-type lifting platform can be extended and retracted in the vertical direction. The top of the scissor-type lifting platform is connected to the three-jaw chuck. The scissor-type lifting platform is drive-connected to the first driving mechanism. The scissor-type lifting platform is used to adjust the support height of the three-jaw chuck to the core rod.

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

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

[0017] Optionally, in the above rolling mill adjustment device, a second driving mechanism is also included, the driving end of the second driving mechanism is connected to the mandrel, and the second driving mechanism is used to drive the mandrel to move along its axial direction.

[0018] Optionally, in the above-mentioned rolling mill adjustment device, the second driving mechanism also includes a Y-shaped bracket, and the Y-shaped bracket is used to support the mandrel.

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

[0020] Optionally, in the above-mentioned rolling mill adjustment equipment, the first distance measuring device includes a laser distance meter, a photoelectric distance meter or an infrared distance meter.

[0021] Compared with the prior art, when the above technical solution is adopted, the operator places the two supporting and positioning devices on the input side and the output side of the three-roller oblique rolling mill respectively, and controls the two supporting and positioning devices to move up and down through the controller. When the line connecting the support centers of the two supporting and positioning devices coincides with the axis of the mandrel, and the axis of the mandrel passes through the rolling space of the three-roller oblique rolling mill, the mandrel is then passed through one of the supporting and positioning devices, the three-roller oblique rolling mill and the other supporting and positioning device in sequence, the mandrel is supported and positioned by the supporting and positioning devices, and then the supporting and positioning devices are controlled to move by the controller so that the axis of the mandrel coincides with the rolling center line of the three-roller oblique rolling mill. At this time, the distance L1 from the three rollers to the surface of the mandrel is measured respectively by the three first distance measuring devices, and the distance S1 from the guide plate to the surface of the mandrel is measured respectively by the three second distance measuring devices. The controller measures the distances according to the measurements of each first distance measuring device. The distance L1 of the three rollers is controlled to move, so that the distance L1 from the three rollers to the mandrel is equal. According to the distance S1 measured by each second distance measuring device, the three guide plates are controlled to move, so that the distance S1 from the three guide plates to the surface of the mandrel is equal. Finally, the controller controls and adjusts the target processing aperture of the three-roller oblique rolling mill according to the processing diameter of the workpiece to be processed, controls the supporting and positioning device to release the mandrel, and moves the mandrel out of the three-roller oblique rolling mill and the supporting and positioning device along the line connecting the support centers, so that the three-roller oblique rolling mill can be rolled. Compared with the traditional method of manually adjusting the position of the rollers and the guide plates, the present application realizes the accurate control and positioning adjustment of the colinearity of the axis of the mandrel and the rolling center line of the three rollers through the control connection between the controller and the supporting and positioning device, the first distance measuring device and the second distance measuring device, so as to improve the uniformity of the circumferential deformation of the workpiece during the rolling process of the three-roller oblique rolling mill.

[0022] In a second aspect, the present invention further 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 two supporting and positioning devices to move so that the line connecting the supporting centers of the two supporting and positioning devices coincides with the axis of the mandrel at the pre-positioning position, wherein the axis of the mandrel at the pre-positioning position passes through the rolling space of the three-roller cross-rolling mill;

[0024] S200, the mandrel is sequentially passed through one of the supporting and positioning devices, the three-roller inclined rolling mill and another supporting and positioning device, and the mandrel is supported and positioned by the supporting and positioning device;

[0025] S300, the controller controls the support positioning device to move so that the axis of the mandrel coincides with the rolling center line of the three-roller cross-rolling mill:

[0026] S400, respectively measuring the distances L1 from the three rollers to the surface of the mandrel by means of three first distance measuring devices, and respectively measuring the distances S1 from the guide plate to the surface of the mandrel by means of three second distance measuring devices;

[0027] S500, the controller controls the three rollers to move according to the distance L1 measured by each first distance measuring device, so that the distance L1 from the three rollers to the mandrel is equal, and the controller controls the three guide plates to move according to the distance S1 measured by each second distance measuring 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 three guide plates to move according to the distance S1 measured by each second distance measuring device, so that the distances S1 from the three guide plates to the surface of the mandrel are equal;

[0029] S700, the controller controls and adjusts the target processing aperture of the three-roller inclined rolling mill according to the processing diameter of the workpiece to be processed, controls the support positioning device to release the mandrel, and moves the mandrel out of the three-roller inclined rolling mill and the support positioning device along the direction of the line connecting the support centers.

[0030] Optionally, in the adjustment method of the rolling mill adjustment device, the controller controls the two supporting and positioning devices to move so that the line connecting the supporting centers of the two supporting and positioning devices coincides with the axis of the mandrel at the pre-positioning position, including:

[0031] Obtaining the distance X1 between the mandrel at the pre-positioned position and the ground and the radius r1 of the mandrel;

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

[0033] 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 core rod at the pre-positioning position.

[0034] Compared with the prior art, the beneficial effects of the adjustment method of the rolling mill adjustment equipment provided by the present invention are the same as the beneficial effects of the rolling mill adjustment equipment of the above-mentioned technical solution, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0036] Figure 1 It 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 It is a structural schematic diagram of a rolling mill adjustment device provided in an embodiment of the present invention in a working state;

[0038] Figure 3 for Figure 1Side view of

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

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

[0041] Figure 6 for Figure 4 A partial enlarged view of point B in the middle;

[0042] Figure 7 for Figure 1 The CC is a schematic diagram of the structure before step S303;

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

[0044] Reference numerals:

[0045] 1-mandrel; 2-three-roller oblique rolling mill; 21-roller; 22-guide plate; 3-support positioning device; 31-three-jaw chuck; 32-scissor-type lifting platform; 321-base; 322-guide rail; 323-telescopic rod; 324-X-type telescopic frame; 325-storage plate; 4-first distance measuring device; 5-second distance measuring device; 6-second driving mechanism; 61-Y-type bracket. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

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

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0049] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] like Figure 1-Figure 8 As shown, a rolling mill adjustment device provided by an embodiment of the present invention includes: a mandrel 1, a three-roller inclined rolling mill 2, two supporting and positioning devices 3, a first distance measuring device 4, a second distance measuring device 5 and a controller.

[0052] Among them, the three-roller oblique rolling mill 2 has three rollers 21 and three guide plates 22 arranged at intervals, and the rollers 21 and the guide plates 22 are alternately distributed in the circumferential direction; two supporting and positioning devices 3 are respectively arranged on the input side and the output side of the three-roller oblique rolling mill 2, and the mandrel 1 passes through one of the supporting and positioning devices 3, the three-roller oblique rolling mill 2 and the other supporting and positioning device 3 in sequence, so that the connecting direction of the support centers of the two supporting and positioning devices 3, the axis of the mandrel 1 and the rolling center line of the three-roller oblique rolling mill 2 coincide, and the two supporting and positioning devices 3 are used for circumferential positioning of the mandrel 1 and adjustment of the support height of the mandrel 1; the three first distance measuring devices 4 are respectively installed at Three rolling rollers 21 and three second distance measuring devices 5 are respectively installed on the three guide plates 22. The measuring path direction of each first distance measuring device 4 and the measuring 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 rolling roller 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 controlled and connected with the supporting and positioning device 3, the first distance measuring device 4, the second distance measuring device 5 and the three-roller inclined rolling mill 2. The controller is used to control and adjust the working positions of the supporting and positioning device 3, the rolling rollers 21 and the guide plates 22 according to the detected distance information.

[0053] When implementing it, Figure 1As shown, the operator places two supporting and positioning devices 3 on the input side and output side of the three-roller oblique rolling mill 2 respectively, and controls the movement of the two supporting and positioning devices 3 through the controller. When the line connecting the support centers of the two supporting and positioning devices 3 coincides with the axis of the mandrel 1, and the axis of the mandrel 1 passes through the rolling space of the three-roller oblique rolling mill 2, the mandrel 1 is then passed through one of the supporting and positioning devices 3, the three-roller oblique rolling mill 2 and the other supporting and positioning device 3 in sequence, the mandrel 1 is supported and positioned by the supporting and positioning device 3, and then the supporting and positioning device 3 is controlled to move by the controller so that the axis of the mandrel 1 coincides with the rolling center line of the three-roller oblique rolling mill 2. At this time, the three first distance measuring devices 4 respectively measure the distance L1 from the three rollers 21 to the surface of the mandrel 1, and the three second distance measuring devices 5 respectively measure the distance S1 from the guide plate 22 to the surface of the mandrel 1. The controller controls the three first distance measuring devices 4 according to the distance L1 measured by each first distance measuring device 4. The rolling rollers 21 move so that the distance L1 from the three rolling rollers 21 to the mandrel 1 is equal. According to the distance S1 measured by each second distance measuring device 5, the three guide plates 22 are controlled to move so that the distance S1 from the three guide plates 22 to the surface of the mandrel 1 is equal. Finally, the controller controls and adjusts the target processing aperture of the three-roller oblique rolling mill 2 according to the processing diameter of the workpiece to be processed, controls the support and positioning device 3 to release the mandrel 1, and moves the mandrel 1 out of the three-roller oblique rolling mill 2 and the support and positioning device 3 along the line connecting the support centers, so that the mandrel 1 can be rolled by the three-roller oblique rolling mill 2. Compared with the traditional method of manually adjusting the positions of the rolling rollers 21 and the guide plates 22, the present application realizes accurate control and positioning adjustment of the colinearity of the axis of the mandrel 1 and the rolling center line of the three rolling rollers through the control connection between the controller and the support and positioning device 3, the first distance measuring device 4 and the second distance measuring device 5, so as to improve the uniformity of the circumferential deformation of the workpiece during the rolling process of the three-roller oblique rolling mill 2.

[0054] Specifically, in this embodiment, the supporting and positioning device 3 includes: a three-jaw chuck 31 and a scissors-type lifting platform 32. The three-jaw chuck 31 can shrink or expand radially, and the three-jaw chuck 31 is used to pass and clamp the core rod 1; the scissors-type lifting platform 32 can be extended and retracted in the vertical direction, and the top end of the scissors-type lifting platform 32 is connected to the three-jaw chuck 31, and the scissors-type lifting platform 32 is driven and connected to the first driving mechanism, and the scissors-type lifting platform 32 is used to adjust the supporting height of the three-jaw chuck 31 to the core rod 1.

[0055] like Figure 6As shown, the scissor-type lifting platform 32 includes: a base 321, a guide rail 322, a telescopic rod 323, an X-shaped telescopic frame 324, and a storage plate 325. The base 321 is provided with a guide rail 322, and the X-shaped telescopic frame 324 has two opposite telescopic ends, one of which is provided with a telescopic rod 323. The extension or shortening of the telescopic rod 323 can make one of the telescopic ends slide along the guide of the guide rail 322. The telescopic rod 323 is drivingly connected to the first driving mechanism, and the other telescopic end is movably connected to the storage plate 325. The storage plate 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 the core rods 1 of different diameters, and pass one end of the core rod 1 through the three-jaw chucks 31 on the two adjacent supporting and positioning devices 3 in sequence. After placement, the three-jaw chuck 31 is contracted radially to fix the core rod 1. At this time, the first driving mechanism is started to drive the scissor-type lifting platform 32 to rise upward in the vertical direction. During this process, the first driving mechanism drives the telescopic rod 323 to contract, so that one of the telescopic ends of the X-shaped telescopic frame 324 slides along the guide rail 322, and the storage plate 325 continues to rise in the vertical direction, so that the three-jaw chuck 31 drives the core rod 1 to move upward in the vertical direction until the support height of the core rod 1 is reached. It is sufficient to ensure that the axis of the mandrel 1 coincides with the rolling center line of the three-roller inclined rolling mill 2; when the rolling task is completed, the operator expands the three-jaw chuck 31 radially to release the mandrel 1, and moves the mandrel 1 out of the three-jaw chuck 31 on the two adjacent supporting and positioning devices 3. At this time, the first driving mechanism is started to drive the scissors-type lifting platform 32 to descend downward in the vertical direction. During this process, the first driving mechanism drives the telescopic rod 323 to extend, so that one of the telescopic ends of the X-shaped telescopic frame 324 slides along the guide rail 322, and the storage plate 325 continues to descend in the vertical direction, so that the scissors-type lifting platform 32 shrinks and returns to its initial position, thereby completing the storage of the supporting and positioning device 3, which is convenient for operation.

[0056] In other embodiments, the first drive mechanism and the three-jaw chuck 31 are both connected to the controller. In the preparation of bimetallic composite pipes, the uniformity of wall thickness is a key indicator for evaluating its comprehensive performance. It is particularly important to improve the adjustment accuracy of the rollers and guide plates. At the same time, due to the gap of the pressing device, the diameter of the target product usually needs to be slightly smaller than the hole size. Compared with the traditional reliance on manual experience judgment, the adjustment efficiency is not high and there is a certain randomness. When the present application is working, the operator can realize the automatic control and adjustment of the drive of the first drive mechanism and the radial contraction or expansion of the three-jaw chuck 31 through the controller, ensuring the accurate adjustment of the hole size of the target product clamped by the three-jaw chuck 31, facilitating operation, and improving the uniformity of the wall thickness processed by the rolling 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 the manual chuck, the pneumatic chuck and the hydraulic chuck have the advantages of rapid clamping, convenient installation, large clamping force, and stable and reliable, which improves the clamping efficiency of the mandrel 1. Of course, the three-jaw chuck 31 can also adopt other chuck structures to clamp and fix the mandrel 1, and the three-jaw chuck 31 is not limited to the chuck structure 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 the mandrel 1 supported by the scissor-type lifting platform 32 is large, the force required to be provided by the first drive mechanism also increases. The hydraulic cylinder uses a hydraulic system, which can provide the first drive mechanism with power for normal operation. The hydraulic cylinder has a smooth transmission and a compact structure; the pneumatic cylinder is small in size, and air is used 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 program control, with energy saving and environmental protection, etc. Among them, the first drive mechanism is not limited to the drive mechanism listed in this embodiment. The first drive mechanism can also use other drive mechanisms with driving functions, which is convenient for accurate control and adjustment of the first drive mechanism through the controller, saving the use cost of the rolling mill adjustment equipment.

[0059] like Figure 1 and Figure 2 As shown, specifically, in this embodiment, the rolling mill adjustment device also 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. Among them, the second drive mechanism 6 can adopt a drive mode such as a screw drive, a motor drive, a hydraulic drive or a pneumatic drive. Of course, the second drive mechanism 6 can also adopt other drive modes, as long as it is ensured that the drive end of the second drive mechanism 6 can drive the mandrel 1 to move along its axial direction. At the same time, compared with the traditional manual push to place the mandrel 1, the second drive mechanism 6 can also be connected to the controller control, so that the controller can accurately control and adjust the movement of the second drive mechanism 6 according to the axial position of the mandrel 1, thereby improving the response speed of the second drive mechanism 6, facilitating the adjustment and control of the movement of the second drive mechanism 6, and saving labor costs.

[0060] like Figure 7As shown, specifically, in this embodiment, the second driving mechanism 6 further includes a Y-shaped bracket 61, and the Y-shaped bracket 61 is used to support the mandrel 1. The Y-shaped bracket 61 can bear a large load and has good stability, wherein the Y-shaped bracket 61 can be arranged with 2, 3, 5, etc., along the axial direction of the mandrel 1. Of course, a U-shaped bracket or a bracket of other shapes and structures 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 distance measuring device 4 and the second distance measuring device 5 have the same structure, which is convenient for installation and disassembly, and reduces the use cost of the first distance measuring device 4 and the second distance measuring device 5.

[0062] Specifically, in this embodiment, the first distance measuring device 4 includes a laser distance meter, a photoelectric distance meter or an infrared distance meter. The laser distance meter, the photoelectric distance meter and the infrared distance meter all have the characteristics of high precision, high speed and good stability. When measuring, the laser distance meter mainly measures the distance by the propagation speed of light; the photoelectric distance meter indirectly measures the distance by measuring the time required for the electromagnetic wave to propagate back and forth at the distance to be measured; the infrared distance meter measures the distance by measuring the time from the emission to the reception of the infrared ray and the propagation speed of the infrared ray. Of course, the first distance measuring device 4 is not limited to the measuring equipment listed in this embodiment. The first distance measuring device 4 can also use an ultrasonic distance sensor or other equipment with the function of measuring distance, which improves the accuracy of the distance measurement of the distance L1 from the roller 21 to the surface of the mandrel 1 and the distance S1 from the guide plate 22 to the surface of the mandrel 1.

[0063] At the same time, the present invention also provides an adjustment method for a rolling mill adjustment device, using the above-mentioned rolling mill adjustment device, the method comprises the following steps:

[0064] Step S100, the controller controls the two supporting and positioning devices 3 to move so that the line connecting the supporting centers of the two supporting and positioning devices 3 coincides with the axis of the mandrel 1 at the pre-positioning position, wherein the axis of the mandrel 1 at the pre-positioning position passes through the rolling space of the three-roller cross-rolling mill 2;

[0065] Step S200, the mandrel 1 is passed through one of the supporting and positioning devices 3, the three-roller cross-rolling mill 2 and another supporting and positioning device 3 in sequence, and the mandrel 1 is supported and positioned by the supporting and positioning device 3;

[0066] Step S300: the controller controls the support and positioning device 3 to move so that the axis of the mandrel 1 coincides with the rolling center line of the three-roller cross-rolling mill 2.

[0067] Step S400, using three first distance measuring devices 4 to respectively measure the distance L1 from the three rollers 21 to the surface of the mandrel 1, and using three second distance measuring devices 5 to respectively measure the distance S1 from the guide plate 22 to the surface of the mandrel 1;

[0068] Step S500, the controller controls the three rollers 21 to move according to the distance L1 measured by each first distance measuring device 4, so that the distance L1 from the three rollers 21 to the mandrel 1 is equal, and the controller controls the three guide plates 22 to move according to the distance S1 measured by each second distance measuring 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 distance measuring device 4 and the second distance measuring device 5 are installed, the distances L2 and S2 are both known fixed values. By combining the measured distances L1 and S1, it can be obtained by calculation: the target wall thickness L of the workpiece to be processed is L=L1-L2, and the target size S simulated by the guide plate 22 is S1-S2. The controller controls the position movement of the three guide plates 22 and the three rollers 21 according to the distance information measured by the first distance measuring device 4 and the second distance measuring device 5, so as to ensure that the distances L1 from the three rollers 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, thereby avoiding the risk of tearing of the workpiece to be processed due to stress concentration caused by unequal distances between two adjacent rollers 21, and improving the reliability of the adjustment method of the rolling mill adjustment equipment. Compared with the traditional manual adjustment method to determine the rolling center line, the adjustment method provided by the present application can meet the adjustment requirements of mandrels 1 of 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 controls and adjusts the target machining aperture of the three-roller inclined rolling mill 2 according to the machining diameter of the workpiece to be machined, controls the support and positioning device 3 to release the mandrel 1, and moves the mandrel 1 out of the three-roller inclined rolling mill 2 and the support and positioning device 3 along the line direction of the support center.

[0071] Specifically, in the adjustment method of the rolling mill adjustment device, 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 at the pre-positioning position, including:

[0072] Step S301, obtaining the distance X1 between the mandrel 1 at the pre-positioned position and the ground and the radius r1 of the mandrel 1;

[0073] like Figure 7As shown, during operation, the mandrel 1 is first set on the Y-shaped bracket 61 on the second drive mechanism 6 for fixation. At this time, the mandrel 1 is in a pre-positioning position, and the distance X1 between the mandrel 1 and the ground and the radius r1 of the mandrel 1 in this state are obtained through the controller. In some embodiments, the controller can control the movement of the second drive mechanism 6 according to the obtained distance X1 and radius r1 information, and drive the second drive mechanism 6 to adjust the pre-positioning position of the mandrel 1 until the position of the mandrel 1 meets the working requirements.

[0074] Step S302, according to X1 and r1, determine that the support height of the two support and positioning devices 3 for the core rod 1 is H=X1+r1;

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

[0076] Step S303 : the controller controls the support positioning device 3 to move 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 core rod 1 at the pre-positioning position.

[0077] Compared with the traditional method of manually adjusting the fixed position of the core rod 1, the adjustment method of the present application realizes automatic control and adjustment of the support positioning device 3 through a controller, thereby avoiding the risk of misalignment caused by the deviation of the axial position of the core rod 1 during movement and the rolling center line during rolling, thereby improving the processing quality and processing accuracy of the rolled workpiece.

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

[0079] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A rolling mill adjustment device, characterized in that: include: Mandrel; A three-roller cross-rolling mill, comprising three rolls and three guide plates arranged at intervals, wherein the rolls and the guide plates are alternately distributed in sequence along the circumferential direction; Two supporting and positioning devices are respectively arranged on the input side and the output side of the three-roller cross-rolling mill, the mandrel passes through one of the supporting and positioning devices, the three-roller cross-rolling mill and the other supporting and positioning device in sequence, so that the connecting direction of the supporting centers of the two supporting and positioning devices, the axis of the mandrel and the rolling center line of the three-roller cross-rolling mill coincide, and the two supporting and positioning devices are used for circumferential positioning of the mandrel and adjustment of the supporting height of the mandrel; Three first distance measuring devices and three second distance measuring devices, wherein the three first distance measuring devices are respectively installed on the three rollers, and the three second distance measuring devices are respectively installed on the three guide plates, wherein the measuring path direction of each first distance measuring device and the measuring path direction of each second distance measuring device intersect with the axial direction of the mandrel, the first distance measuring device is used to measure the distance L1 from the roller to the surface of the mandrel, and the second distance measuring device is used to measure the distance S1 from the guide plate to the surface of the mandrel; A controller is connected to the support and positioning device, the first distance measuring device, the second distance measuring device and the three-roller inclined rolling mill, and is used to control and adjust the working positions of the support and positioning device, the rolling rollers and the guide plate according to the detected distance information.

2. The rolling mill adjustment device according to claim 1, characterized in that: The supporting and positioning device comprises: A three-jaw chuck capable of contracting or expanding radially, the three-jaw chuck being used to pass through and clamp the mandrel; The scissors-type lifting platform can be extended and retracted in the vertical direction. The top of the scissors-type lifting platform is connected to the three-jaw chuck. The scissors-type lifting platform is driven and connected to the first driving mechanism. The scissors-type lifting platform is used to adjust the supporting height of the three-jaw chuck to the core rod.

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

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

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

6. The rolling mill adjustment device according to claim 5, characterized in that The second driving mechanism further comprises a Y-shaped bracket, and the Y-shaped bracket is used for supporting the core rod.

7. The rolling mill adjustment device according to claim 1, characterized in that: The first distance measuring device and the second distance measuring device have the same structure.

8. The rolling mill adjustment device according to claim 7, characterized in that: The first distance measuring device includes a laser distance measuring device, a photoelectric distance measuring device or an infrared distance measuring device.

9. A method for adjusting a rolling mill adjustment device, using the rolling mill adjustment device according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: S100, the controller controls the two supporting and positioning devices to move so that the line connecting the supporting centers of the two supporting and positioning devices coincides with the axis of the mandrel at the pre-positioning position, wherein the axis of the mandrel at the pre-positioning position passes through the rolling space of the three-roller cross-rolling mill; S200, passing the mandrel through one of the supporting and positioning devices, the three-roller cross-rolling mill and another of the supporting and positioning devices in sequence, and supporting and positioning the mandrel through the supporting and positioning devices; S300, the controller controls the support and positioning device to move so that the axis of the mandrel coincides with the rolling center line of the three-roller cross-rolling mill; S400, respectively measuring the distance L1 from the three rollers to the surface of the mandrel by means of the three first distance measuring devices, and respectively measuring the distance S1 from the guide plate to the surface of the mandrel by means of the three second distance measuring devices; S500, the controller controls the three rollers to move according to the distance L1 measured by each of the first distance measuring devices, so that the distances L1 from the three rollers to the mandrel are equal, and the controller controls the three guide plates to move according to the distance S1 measured by each of the second distance measuring devices, so that the distances S1 from the three guide plates to the surface of the mandrel are equal; S600, the controller controls and adjusts the target machining aperture of the three-roller cross-rolling mill according to the machining diameter of the workpiece to be machined, controls the support and positioning device to release the mandrel, and moves the mandrel out of the three-roller cross-rolling mill and the support and positioning device along the line direction of the support center.

10. The adjustment method of the rolling mill adjustment device according to claim 9, characterized in that: The controller controls the two supporting and positioning devices to move so that the line connecting the supporting centers of the two supporting and positioning devices coincides with the axis of the mandrel at the pre-positioning position, including: Obtaining the distance X1 between the mandrel at the pre-positioned position and the ground and the radius r1 of the mandrel; According to X1 and r1, the support height of the mandrel by the two support and positioning devices is determined to be H=X1+r1; The controller controls the movement of the supporting positioning device according to the supporting height, so that the line connecting the supporting centers of the two supporting positioning devices coincides with the axis of the core rod at the pre-positioning position.

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