Large-diameter large-wall-thickness ring piece rewinder

Abstract

The utility model discloses a large-diameter large-wall-thickness ring piece warping machine which comprises four sets of internal expanding and external pressing devices and four sets of ring piece end face supporting and limiting devices. The four groups of internal expansion and external pressure devices are distributed in a circle at uniform intervals in an annular array mode, the four groups of ring piece end face supporting and limiting devices are distributed in a circle at uniform intervals in an annular array mode, and one group of ring piece end face supporting and limiting devices is arranged in a spare space between every two adjacent internal expansion and external pressure devices; wherein each group of internal expanding and external pressing device adopts a matching mode of one internal expanding wheel and two external pressing wheels, and each group of ring piece end face supporting and limiting device adopts a matching mode of a carrier roller and an end face pressing wheel. The large-diameter large-wall-thickness ring piece rewinder is convenient to operate, good in rewinder effect, high in practicability and wide in application range.

Description

Technical Field

[0001] The utility model relates to a ring sizing machine, in particular to a ring sizing machine with large diameter and large wall thickness. Background Art

[0002] Ring rolling is a plastic rotation forming process that causes the ring to undergo plastic deformation, thereby reducing the wall thickness, expanding the diameter, and forming the cross-sectional profile. This process is suitable for producing ring parts or ring blanks of various shapes, sizes, and materials, such as flanges, bearing rings, gear rings, etc.

[0003] At present, with the development of wind power generation, offshore equipment, nuclear power, aviation and other fields, there is a great demand for large-diameter and thick-walled rings as raw materials, and the materials are usually high-value alloy steel. After the ring rolling, the out-of-roundness of this type of ring is very large. After the next heat treatment, the deformation of the ring is even greater, which can easily cause the machining after heat treatment to fail to meet the required size requirements, resulting in the scrapping of the ring. If the processing allowance is increased, it will cause serious material waste and increase production costs. In order to solve the problem of out-of-round rings after ring rolling and reduce production costs, some companies have made sizing machines. The method of sizing the rings by the sizing machine is to expand from the inside of the ring to the outside, and use multiple equal parts of the jack or screw to push against the inner wall of the ring and then push outward. However, due to the plasticity of steel, the ring will rebound after the outward thrust is lost, resulting in an insignificant sizing effect. The problem of large out-of-roundness of the ring is still a difficult problem to solve in this field. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a large-diameter and large-wall thickness ring sizing machine which is easy to operate, has good sizing effect and is highly practical. The sizing machine is suitable for large-diameter and large-wall thickness rings with a size range of: outer diameter 2 to 20m, wall thickness 30 to 500mm, and height 0.4 to 4m.

[0005] In order to solve the problem of the ring being out of roundness after ring rolling, improve the roundness of the ring, and thus ensure the normal subsequent machining of the ring without increasing the machining allowance, and reduce the scrap rate of the ring, the technical solution adopted by the utility model is: set a base with a horizontal mounting surface or select a horizontal site in the factory installation area as the horizontal mounting surface of the base, select a center of a circle on the horizontal mounting surface, and install the large-diameter and large-walled thick ring sizing machine described in this application on the horizontal mounting surface with the center of the circle as the reference. The large-diameter and large-walled thick ring sizing machine includes: four groups of internal expansion and external pressure devices and four groups of ring end face support and limit devices; the four groups of internal expansion and external pressure devices are distributed in a circle in a uniformly spaced annular array relative to the center of the circle, and the four groups of ring end face support and limit devices are distributed in a circle in a uniformly spaced annular array relative to the center of the circle, and there is a group of ring end face support and limit devices in the empty space between two adjacent internal expansion and external pressure devices.

[0006] The structure of each set of internal expansion and external pressure devices includes: an internal expansion and external pressure bed fixedly mounted on a horizontal mounting surface, an internal expansion and external pressure machine base mounted on the internal expansion and external pressure bed through a first horizontal moving pair, and the internal expansion and external pressure machine base can move horizontally and linearly toward or away from the center of the circle through the first horizontal moving pair; an internal expansion wheel mounting seat is fixedly mounted on the internal expansion and external pressure machine base, an internal expansion wheel is mounted on the internal expansion wheel mounting seat through an internal expansion wheel driving device, and the internal expansion wheel can rotate around itself under the drive of the internal expansion wheel driving device. The axis of the inner expansion wheel shaft rotates; the outer pressure wheel mounting seat is arranged on the inner expansion and outer pressure machine seat through the outer pressure wheel driving device, the outer pressure wheel mounting seat is located on the outer side of the inner expansion wheel mounting seat, and the two outer pressure wheels are movably supported on the outer pressure wheel mounting seat, and the axes of the two outer pressure wheels and the axis of the inner expansion wheel are parallel to the vertical line passing through the center of the circle; the outer pressure wheel mounting seat can be driven by the outer pressure wheel driving device to move the outer pressure wheel mounting seat inwardly or outwardly in a horizontal straight line, thereby reducing or expanding the gap between the two outer pressure wheels and the inner expansion wheel.

[0007] The gap between each inner expansion wheel and each outer pressure wheel is the space for placing the ring. When the inner expansion wheels in the four groups of inner expansion and outer pressure devices are moved to the point where the distance between the axle of each inner expansion wheel and the center of the circle is the same through their respective first horizontal moving pairs, there is an inscribed circle tangent to all four inner expansion wheels, recorded as the first inscribed circle. When the outer pressure wheels in the four groups of inner expansion and outer pressure devices are moved to the point where the distance between the axle of each outer pressure wheel and the center of the circle is the same through their respective outer pressure wheel driving devices, there is an inscribed circle tangent to all eight outer pressure wheels, recorded as the second inscribed circle. The center of the first inscribed circle and the center of the second inscribed circle both coincide with the center of the circle selected as the reference. In the diameter adjustment process, when the four inner expansion wheels and the eight outer pressure wheels are in the above-mentioned state and the eight outer pressure wheels can be driven to rotate by the rotating ring, the ring located between the inner expansion wheels and the outer pressure wheels meets the roundness requirement and the diameter adjustment is completed.

[0008] The rotation of the ring is driven by four inner expansion wheels. Considering the structure of the rotating ring, a roller scheme is adopted here, which is as follows: the structure of each group of ring end face support and limiting devices includes: an end face pressure roller bed fixedly mounted on the horizontal mounting surface, and a roller movably supported on the end face pressure roller bed through a first bearing seat. The roller is a conical structure with a small inner diameter and a large outer diameter, and the upper end generatrix of the roller is perpendicular to the vertical line passing through the center of the circle; the length of the roller is determined according to the diameter range of the ring. When the ring placed on the roller is driven to rotate by each inner expansion wheel, the ring will jump upward due to the force of each inner expansion wheel and each outer pressure wheel. In order to solve this problem, this scheme adds an end face pressure wheel on this basis. The specific structure is as follows: the support frame is mounted on the end face pressure roller bed through a second horizontal moving pair, and the support frame can move horizontally in a straight line close to or away from the center of the circle through the second horizontal moving pair; the end face pressure wheel seat is arranged on the support frame through an end face pressure wheel lifting drive device, and the end face pressure wheel is arranged on the support frame through a second bearing seat. On the end face pressure wheel seat, the end face pressure wheel is located above the roller, the end face pressure wheel is a conical structure with a small inner end diameter and a large outer end diameter, and the lower end generatrix of the end face pressure wheel is perpendicular to the vertical line passing through the center of the circle, the axis of the end face pressure wheel and the axis of the roller are both in the same vertical plane, and the axis of the end face pressure wheel and the axis of the roller both intersect with the vertical line passing through the center of the circle; the end face pressure wheel seat can move the bearing seat downward or upward vertically under the drive of the end face pressure wheel lifting drive device, thereby reducing or expanding the gap between the end face pressure wheel and the roller.

[0009] When the ring is placed in the gap between each inner expansion wheel and each outer pressure wheel, the rollers in the four groups of ring end face support and limit devices jointly support the bottom end face of the ring, and the four rollers will rotate relative to their own roller axis as the ring rotates. The end face pressure wheels in the four groups of ring end face support and limit devices jointly press on the top end face of the ring, and the four end face pressure wheels will also rotate relative to their own end face pressure wheel axis as the ring rotates. The end face pressure wheels press the top end face of the ring, thereby ensuring that the ring does not jump during the rotation process. In addition, the cooperation between the end face pressure wheels and the rollers also corrects the defect that the top end face of the ring is not parallel to the bottom end face of the ring.

[0010] Furthermore, in the aforementioned large-diameter and large-wall-thickness ring sizing machine, the four groups of internal expansion and external pressure devices and the four groups of ring end face support and limiting devices are alternately arranged in pairs and distributed in a circle in a uniformly spaced annular array relative to the center of the circle.

[0011] Furthermore, in the aforementioned large-diameter and large-wall thickness ring sizing machine, in order to facilitate the adjustment of the positions of each inner expansion wheel and each outer pressure wheel, the present scheme also provides a cubic connecting block, the vertical center line of the connecting block overlaps with the vertical line passing through the center of the circle; the inner ends of the inner expansion and external pressure bed bodies in the four groups of inner expansion and external pressure devices are respectively connected to the four side walls of the connecting block, and the trajectory lines of the inner expansion wheels in the inner expansion and external pressure devices on opposite surfaces moved by the first horizontal moving pair are all located on the same horizontal straight line passing through the center of the circle; the line connecting the inner expansion wheels in each group of inner expansion and external pressure devices and the center of the circle is the center line, and the two outer pressure wheels in the inner expansion and external pressure device are symmetrically distributed on both sides of the center line relative to the center line.

[0012] Furthermore, in the aforementioned large-diameter and large-wall thickness ring sizing machine, the structure of the first horizontal movable pair is as follows: a pair of first slide rails are arranged on the internal expansion and external press bed, a plurality of first sliders are arranged at the bottom of the internal expansion and external press machine base, and the internal expansion and external press machine base is arranged on the pair of first slide rails through the first sliders; a first motor is fixedly arranged on the internal expansion and external press bed, and the output end of the first motor is fixedly connected to the first screw rod movably supported on the internal expansion and external press bed, and a first nut screwed on the first screw rod is fixedly arranged at the bottom of the internal expansion and external press machine base.

[0013] Furthermore, in the aforementioned large-diameter and large-wall thickness ring sizing machine, the structure of the second horizontal movable pair is as follows: a pair of second slide rails are arranged on the end face pressing wheel bed, a plurality of second sliding blocks are arranged at the bottom of the support frame, and the support frame is arranged on the pair of second slide rails through each second sliding block; a second motor is fixedly arranged on the end face pressing wheel bed, and the output shaft of the second motor is fixedly connected to the second screw rod movably supported on the end face pressing wheel bed, and a second nut screwed on the second screw rod is fixedly arranged at the bottom of the support frame.

[0014] Furthermore, in the aforementioned large-diameter and large-wall thickness ring sizing machine, the structure of the inner expansion wheel drive device is as follows: an inner expansion wheel power motor and a worm gear transmission are installed on the inner expansion wheel mounting seat, the output shaft of the inner expansion wheel power motor is fixedly connected to the turbine shaft in the worm gear transmission, and the inner expansion wheel is fixed to the bottom of the worm in the worm gear transmission.

[0015] Furthermore, in the aforementioned large-diameter and large-wall thickness ring sizing machine, the structure of the external pressure wheel driving device is as follows: the cylinder body of the external pressure wheel pushing cylinder is fixedly installed on the internal expansion and external press base, and the external pressure wheel mounting base is fixed to the end of the piston rod of the external pressure wheel pushing cylinder.

[0016] Furthermore, in the aforementioned large-diameter and large-wall thickness ring sizing machine, the structure of the end face pressure wheel lifting and lowering drive device is as follows: a pair of third slide rails are vertically arranged on the support frame, and a plurality of third sliders are arranged on the side walls of the end face pressure wheel seat, and the end face pressure wheel seat is arranged on a pair of third slide rails through each third slider; the cylinder body of the end face pressure wheel pressing cylinder is fixedly installed on the support frame, and the end face pressure wheel seat is fixed to the piston rod end of the end face pressure wheel pressing cylinder.

[0017] The beneficial effects of the utility model are as follows: the large-diameter and large-wall-thickness ring sizing machine is easy to operate, has a good sizing effect, and is highly practical. The applicable size range of the large-diameter and large-wall-thickness rings is: outer diameter 2 to 20m, wall thickness 30 to 500mm, height 0.4 to 4 meters, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a large-diameter and large-wall-thickness ring sizing machine described in the utility model.

[0019] Figure 2 yes Figure 1 A schematic diagram of the structure of any group of internal expansion and external pressure devices.

[0020] Figure 3 yes Figure 2 Schematic diagram of the structure in the AA section direction.

[0021] Figure 4 yes Figure 1 A schematic diagram of the structure of any group of ring end face support and limit devices.

[0022] Figure 5 yes Figure 4 Schematic diagram of the structure in the BB section direction. DETAILED DESCRIPTION

[0023] The technical solution of the present utility model is further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0024] A base with a horizontal mounting surface is set up or a horizontal site in the factory installation area is selected as the horizontal mounting surface of the base, a circle center C is selected on the horizontal mounting surface, and the large-diameter and large-wall-thickness ring sizing machine described in this application is installed on the horizontal mounting surface with the circle center C as the reference. The large-diameter and large-wall-thickness ring sizing machine comprises: four groups of internal expansion and external pressure devices 1 and four groups of ring end face support and limit devices 2; the four groups of internal expansion and external pressure devices 1 are distributed in a circle in a uniformly spaced annular array relative to the circle center C, and the four groups of ring end face support and limit devices 2 are distributed in a circle in a uniformly spaced annular array relative to the circle center C, and there is a group of ring end face support and limit devices 2 in the empty space between two adjacent internal expansion and external pressure devices 1.

[0025] A more preferred arrangement and installation scheme is: four sets of internal expansion and external pressure devices 1 and four sets of ring end surface support and limit devices 2 are arranged alternately in pairs and distributed in a circle in a uniformly spaced annular array relative to the center C. At this time, the angle α between the two adjacent internal expansion and external pressure devices 1 and the ring end surface support and limit devices 2 is 45°, such as Figure 1 shown.

[0026] For the convenience of description, the direction close to the center of the circle is defined as "inside" and the direction away from the center of the circle is defined as "outside" in the present invention. All directional words involving "inside" and "outside" in the present invention are based on the above definitions. It should be noted that the directions or positional relationships indicated by the terms "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.

[0027] 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 direct connection, an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In order to make the ring 100 rotate around a center, which is the circle center C defined above, the present solution uses the inner expansion wheel 8 as the power source. The inner expansion wheel 8 is divided into four groups, which are on the same circumference. Figure 1 , Figure 2 and Figure 3 As shown, the structure of each group of internal expansion and external pressure devices 1 described in this embodiment includes: an internal expansion and external pressure bed 3 fixedly mounted on a horizontal mounting surface, an internal expansion and external pressure machine base 4 mounted on the internal expansion and external pressure bed 3 through a first horizontal moving pair, and the internal expansion and external pressure machine base 4 can move horizontally and linearly toward or away from the center C through the first horizontal moving pair. Among them, the structure of the first horizontal moving pair in this embodiment is: a pair of first slide rails are arranged on the internal expansion and external pressure bed 3, a plurality of first sliders are arranged at the bottom of the internal expansion and external pressure machine base 4, and the internal expansion and external pressure machine base 4 is arranged on a pair of first slide rails through each first slider. A first motor 5 is fixedly arranged on the internal expansion and external pressure bed 3, and the output end of the first motor 5 is fixedly connected to a first screw rod 6 movably supported on the internal expansion and external pressure bed 3, and a first nut screwed on the first screw rod 6 is fixedly arranged at the bottom of the internal expansion and external pressure machine base 4, and the first screw rod 6 and the first nut form a spiral transmission. During operation, the direction in which the inner expansion and outer compression machine base 4 moves along the pair of first slide rails is achieved by controlling the forward and reverse rotation of the first motor 5 .

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, the inner expansion wheel mounting seat 7 is fixedly arranged on the inner expansion and outer press seat 4, and the inner expansion wheel 8 is arranged on the inner expansion wheel mounting seat 7 through the inner expansion wheel driving device, and the inner expansion wheel 8 can rotate around the axis of its own inner expansion wheel shaft under the drive of the inner expansion wheel driving device. Among them, the structure of the inner expansion wheel driving device described in this embodiment is: the inner expansion wheel power motor 9 and the worm gear transmission 10 are installed on the inner expansion wheel mounting seat 7, the output shaft of the inner expansion wheel power motor 9 is fixedly connected to the turbine shaft in the worm gear transmission 10, and the inner expansion wheel 8 is fixed to the bottom of the worm in the worm gear transmission 10. During movement, it is ensured that the four inner expansion wheels 8 revolve around the same center, that is, the reference circle center C set above, and move in and out together. When at least two inner expansion wheels 8 come into contact with the inner side wall of the ring 100, the ring 100 will rotate due to the friction force.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment also designs a set of outer pressure wheel structures opposite to each inner expansion wheel 8, and two outer pressure wheels 12 are arranged in one set of outer pressure wheel structures, and the specific structure is as follows: the outer pressure wheel mounting seat 11 is arranged on the inner expansion and outer press machine seat 4 through the outer pressure wheel driving device, and the outer pressure wheel mounting seat 11 is located outside the inner expansion wheel mounting seat 7, and the two outer pressure wheels 12 are movably supported on the outer pressure wheel mounting seat 11, and the axes of the two outer pressure wheels 12 and the axis of the inner expansion wheel 8 are parallel to the vertical line passing through the center of the circle C. The outer pressure wheel mounting seat 11 can be driven by the outer pressure wheel driving device to move the outer pressure wheel mounting seat 11 inwardly or outwardly in a horizontal straight line, thereby reducing or expanding the gap between the two outer pressure wheels 12 and the inner expansion wheel 8. The moving track of the outer pressure wheel mounting seat 11 is parallel to the moving track of the inner expansion and outer pressure machine seat 4, wherein the structure of the outer pressure wheel driving device described in this embodiment is as follows: the cylinder body of the outer pressure wheel push cylinder 13 is fixedly mounted on the inner expansion and outer pressure machine seat 4, and the outer pressure wheel mounting seat 11 is fixed to the piston rod end of the outer pressure wheel push cylinder 13. During operation, the piston rod of the outer pressure wheel push cylinder 13 is extended or retracted to control the gap between the two outer pressure wheels 12 and the inner expansion wheel 8 to be reduced or expanded.

[0031] In order to facilitate the adjustment of the positions of the inner expansion wheels 8 and the outer pressure wheels 12, the present invention further provides a square connection block 14, such as Figure 1As shown, the vertical center line of the connection block 14 overlaps with the vertical line passing through the center C of the reference circle. The inner ends of the inner expansion and external pressure beds 3 in the four groups of inner expansion and external pressure devices 1 are respectively connected to the four side walls of the connection block 14, and the trajectory lines of the inner expansion wheels 8 in the inner expansion and external pressure devices 1 on opposite sides are moved through the first horizontal moving pair on the same horizontal line passing through the center C of the reference circle. The line connecting the inner expansion wheels 8 in each group of inner expansion and external pressure devices 1 and the center C is the middle line, and the two outer pressure wheels 12 in the inner expansion and external pressure device 1 are symmetrically distributed on both sides of the middle line relative to the middle line.

[0032] When the inner expansion wheels 8 in the four sets of inner expansion and external pressure devices 1 are moved by their respective first horizontal moving pairs until the distances between the inner expansion wheel axles and the center C are the same, there is an inscribed circle tangent to the four inner expansion wheels 8, which is recorded as the first inscribed circle. When the outer pressure wheels 12 in the four sets of inner expansion and external pressure devices 1 are moved by their respective outer pressure wheel driving devices until the distances between the outer pressure wheel axles and the center C are the same, there is an inscribed circle tangent to the eight outer pressure wheels 12, which is recorded as the second inscribed circle. The centers of the first inscribed circle and the second inscribed circle both coincide with the center C selected as the reference.

[0033] like Figure 1 , Figure 4 and Figure 5 As shown, the structure of each group of ring end face support and limit device 2 in this embodiment includes: an end face pressing wheel bed 15 fixedly mounted on the horizontal mounting surface, and a roller 16 movably supported on the end face pressing wheel bed 15 through a first bearing seat 17, wherein the roller 16 is a conical structure with a small inner diameter and a large outer diameter, and the upper end generatrix 18 of the roller 16 is perpendicular to the vertical line passing through the center C of the circle. This arrangement is to ensure that the bottom end face of the ring 100 and the roller 16 are in line contact after the diameter adjustment, and the other is that the linear speed of the bottom end face of the ring 100 from the inside to the outside is different, and the roller 16 with a conical structure can meet the requirements of matching the different linear speeds. The support frame 19 is mounted on the end face pressing wheel bed 15 through the second horizontal moving pair, and the support frame 19 can move horizontally and linearly in the direction close to the center C or away from the center C through the second horizontal moving pair. The structure of the second horizontal moving pair is as follows: a pair of second slide rails are arranged on the end face pressing wheel bed 15, a plurality of second sliders are arranged at the bottom of the support frame 19, and the support frame 19 is arranged on the pair of second slide rails through the second sliders; a second motor 20 is fixedly arranged on the end face pressing wheel bed 15, and the output shaft of the second motor 20 is fixedly connected to the second screw rod movably supported on the end face pressing wheel bed 15, and a second nut screwed on the second screw rod is fixedly arranged at the bottom of the support frame 19, and the second screw rod and the second nut form a spiral transmission. When working, the direction of movement of the support frame 19 along the pair of second slide rails is realized by controlling the forward and reverse rotation of the second motor 20.

[0034] like Figure 1 , Figure 4 and Figure 5 As shown, the end face pressing wheel seat 21 is arranged on the support frame 19 through the end face pressing wheel lifting drive device, and the end face pressing wheel 23 is arranged on the end face pressing wheel seat 21 through the second bearing seat 22. The end face pressing wheel 23 is located above the roller 16. The end face pressing wheel 23 is a conical structure with a small inner diameter and a large outer diameter, and the lower end generatrix 24 of the end face pressing wheel 23 is perpendicular to the vertical line passing through the center of the circle C, that is, the lower end generatrix 24 of the end face pressing wheel 23 is parallel to the upper end generatrix 18 of the roller 16 and is in the horizontal direction. This arrangement is to ensure that the top end face of the ring 100 after sizing is in line contact with the end face pressing wheel 23, and the other is that the linear speed of the top end face of the ring 100 from the inside to the outside is different, and the end face pressing wheel 23 with a conical structure can meet the requirements of matching the different linear speeds. The axis of the end face pressing wheel 23 and the axis of the roller 16 are both in the same vertical plane, and the axis of the end face pressing wheel 23 and the axis of the roller 16 intersect with the vertical line passing through the center of circle C. The end face pressing wheel seat 21 can move the bearing seat 22 vertically downward or upward under the drive of the end face pressing wheel lifting drive device, thereby reducing or expanding the gap between the end face pressing wheel 23 and the roller 16. The structure of the end face pressing wheel lifting drive device is as follows: a pair of third slide rails are vertically arranged on the support frame 19, a plurality of third sliders are arranged on the side wall of the end face pressing wheel seat 21, and the end face pressing wheel seat 21 is arranged on the pair of third slide rails through each third slider; the cylinder body of the end face pressing wheel pressing cylinder 25 is fixedly installed on the support frame 19, and the end face pressing wheel seat 21 is fixed to the piston rod end of the end face pressing wheel pressing cylinder 25. During operation, the gap between the end surface pressing wheel 23 and the supporting roller 16 is controlled to be reduced or expanded by controlling the extension and retraction of the piston rod of the end surface pressing wheel pressing cylinder 25 .

[0035] The end face pressing wheel 23 presses the top end face of the ring 100, thereby ensuring that the ring 100 does not jump during the rotation process. In addition, the end face pressing wheel 23 cooperates with the roller 16 to correct the defect that the top end face of the ring 100 is not parallel to the bottom end face of the ring 100, thereby improving the effect of the ring 100 after the diameter adjustment.

[0036] The working process of the above-mentioned large diameter and large wall thickness ring sizing machine is as follows:

[0037] The gaps between the four inner expansion wheels 8 and the eight outer pressure wheels 12 are spaces for placing the rings 100. First, after the rings 100 are placed in the gaps between the inner expansion wheels 8 and the outer pressure wheels 12, the rollers 16 in the four groups of ring end face support limit devices jointly support the bottom end faces of the rings 100.

[0038] Next, the inner expansion and external pressure machine bases 4 in the four groups of inner expansion and external pressure devices 1 are adjusted through the first horizontal moving pairs corresponding to each other, so that the inner expansion wheels 8 in the four groups of inner expansion and external pressure devices 1 move outward synchronously, and ensure that the distance between each inner expansion wheel 8 and the center of the circle C is always the same during the movement. When at least two inner expansion wheels 8 in the four groups of inner expansion and external pressure devices 1 are in contact with the inner side wall of the ring 100, during the rotation of each inner expansion wheel 8 in contact with the inner side wall of the ring 100, the ring 100 will rotate due to friction, and at this time, the four rollers 16 will rotate relative to their own roller axis due to friction as the ring 100 rotates.

[0039] Next, first adjust the two groups of internal expansion and external pressure devices 1 that are opposite to each other. The selection method is to select the internal expansion and external pressure device 1 that is in contact with the ring 100, so that each outer pressure wheel in the two groups of internal expansion and external pressure devices 1 is pushed into the oil cylinder 13 to push the corresponding outer pressure wheel mounting seat 11, so that the corresponding outer pressure wheel 12 is synchronously moved inward until it contacts the outer wall of the ring 100 and applies a certain pressure; then adjust the other two groups of internal expansion and external pressure devices 1, so that the distance from each outer pressure wheel 12 in the two groups of internal expansion and external pressure devices 1 to the center C is consistent with the distance from each outer pressure wheel 12 in the two groups of internal expansion and external pressure devices 1 adjusted first to the center C of the circle.

[0040] Next, the support frames 19 in the four sets of ring end surface support and limit devices 2 are adjusted through the respective corresponding second horizontal moving pairs, so that the end surface pressure wheels 23 in the four sets of ring end surface support and limit devices 2 are moved inward to the set position, at which time the distances between each end surface pressure wheel 23 and the vertical line passing through the center of the circle C are the same. The end surface pressure wheel pressing cylinders 25 are activated to move each end surface pressure wheel 23 downward to contact the top end surface of the ring 100 and apply a certain pressure, at which time the four end surface pressure wheels 23 will rotate relative to their own end surface pressure wheel axes due to friction as the ring 100 rotates.

[0041] Then, the inner expansion wheels 8 and the outer pressure wheels 12 are adjusted repeatedly. In each adjustment process, it is necessary to ensure that the distance between the inner expansion wheels 8 and the center C is always the same, and the distance between the outer pressure wheels 12 and the center C is always the same. After repeating several times, all the outer pressure wheels 12 will rotate. When such a phenomenon occurs, it indicates that the ring 100 at this time has reached the roundness requirement under the rolling of the outer expansion wheels 8 and the outer pressure wheels 12. Then, the outer pressure wheels 12 are withdrawn outwards, and then the end pressure wheels 23 are raised. Finally, the inner expansion wheels 8 are retracted, and the ring 100 is sized. After actual use, the effect fully meets the expected effect, with convenient operation, good sizing effect, and strong practicality. It is suitable for the sizing operation of large-diameter and large-walled rings with an outer diameter of 2 to 20m, a wall thickness of 30 to 500mm, and a height of 0.4 to 4 meters.

[0042] The above description is only a preferred embodiment of the present invention and does not constitute any other limitation on the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. Large diameter and thick wall ring sizing machine, characterized by: include: Four groups of internal expansion and external pressure devices and four groups of ring end surface support and limit devices; the four groups of internal expansion and external pressure devices are distributed in a circle in a uniformly spaced annular array relative to the center of the circle, the four groups of ring end surface support and limit devices are distributed in a circle in a uniformly spaced annular array relative to the center of the circle, and there is one group of ring end surface support and limit devices in the empty space between any two adjacent internal expansion and external pressure devices; The structure of each group of internal expansion and external pressure devices includes: an internal expansion and external pressure bed, an internal expansion and external pressure machine base is installed on the internal expansion and external pressure bed through a first horizontal moving pair, and the internal expansion and external pressure machine base can move horizontally and linearly in a direction close to or away from the center of a circle through the first horizontal moving pair; an inner expansion wheel mounting seat is fixedly arranged on the internal expansion and external pressure seat, the inner expansion wheel is arranged on the inner expansion wheel mounting seat through an inner expansion wheel driving device, and the inner expansion wheel can rotate around the axis of its own inner expansion wheel shaft under the drive of the inner expansion wheel driving device; an outer pressure wheel mounting seat is arranged on the internal expansion and external pressure seat through an outer pressure wheel driving device, and the outer pressure wheel mounting seat is located on the outer side of the inner expansion wheel mounting seat, and two outer pressure wheels are movably supported on the outer pressure wheel mounting seat, and the axes of the two outer pressure wheels and the axis of the inner expansion wheel are parallel to the vertical line passing through the center of the circle; the outer pressure wheel mounting seat can be driven by the outer pressure wheel driving device to make the outer pressure wheel mounting seat move horizontally and linearly inwardly or outwardly, thereby reducing or expanding the gap between the two outer pressure wheels and the inner expansion wheel; The structure of each set of ring end face support and limiting devices includes: an end face pressing wheel bed, a roller is movably supported on the end face pressing wheel bed through a first bearing seat, the roller is a conical structure with a small inner end diameter and a large outer end diameter, and the upper end generatrix of the roller is perpendicular to the vertical line passing through the center of the circle; the support frame is installed on the end face pressing wheel bed through a second horizontal moving pair, and the support frame can move horizontally and linearly toward or away from the center of the circle through the second horizontal moving pair; the end face pressing wheel seat is arranged on the support frame through an end face pressing wheel lifting drive device, and the end face pressing wheel is moved through the second axis The bearing seat is arranged on the end face pressure wheel seat, and the end face pressure wheel is located above the roller. The end face pressure wheel is a conical structure with a small inner end diameter and a large outer end diameter, and the lower end generatrix of the end face pressure wheel is perpendicular to the vertical line passing through the center of the circle, the axis of the end face pressure wheel and the axis of the roller are both in the same vertical plane, and the axis of the end face pressure wheel and the axis of the roller both intersect with the vertical line passing through the center of the circle; the end face pressure wheel seat can move the bearing seat downward or upward vertically under the drive of the end face pressure wheel lifting drive device, thereby reducing or expanding the gap between the end face pressure wheel and the roller.

2. The large diameter and thick wall ring sizing machine according to claim 1, characterized in that: The four groups of inner expansion and outer pressure devices and the four groups of ring end surface support and limit devices are arranged alternately in pairs and distributed in a circle in a ring array with uniform intervals relative to the center of the circle.

3. The large diameter and thick wall ring sizing machine according to claim 1 or 2, characterized in that: A quadrilateral connecting block is also provided, the vertical center line of the connecting block overlaps with the vertical line passing through the center of the circle; the inner ends of the internal expansion and external pressure bed bodies in the four groups of internal expansion and external pressure devices are respectively connected to the four side walls of the connecting block, and the trajectory lines of the internal expansion wheels in the internal expansion and external pressure devices on opposite sides of each other moving through the first horizontal moving pair are all located on the same horizontal line passing through the center of the circle; the line connecting the internal expansion wheels in each group of internal expansion and external pressure devices and the center of the circle is the middle line, and the two external pressure wheels in the internal expansion and external pressure device are symmetrically distributed on both sides of the middle line relative to the middle line.

4. The large diameter and thick wall ring sizing machine according to claim 1, characterized in that: The structure of the first horizontal moving pair is as follows: a pair of first slide rails are arranged on the inner expansion and external press bed, a plurality of first sliders are arranged at the bottom of the inner expansion and external press base, and the inner expansion and external press base is arranged on the pair of first slide rails through the first sliders; a first motor is fixedly arranged on the inner expansion and external press bed, an output end of the first motor is fixedly connected to a first screw rod movably supported on the inner expansion and external press bed, and a first nut screwed on the first screw rod is fixedly arranged at the bottom of the inner expansion and external press base; The structure of the second horizontal movable pair is as follows: a pair of second slide rails are arranged on the end surface pressing wheel bed body, a plurality of second sliding blocks are arranged at the bottom of the support frame, and the support frame is arranged on the pair of second slide rails through each second sliding block; a second motor is fixedly arranged on the end surface pressing wheel bed body, and the output shaft of the second motor is fixedly connected to the second screw rod movably supported on the end surface pressing wheel bed body, and a second nut screwed on the second screw rod is fixedly arranged at the bottom of the support frame.

5. The large diameter and thick wall ring sizing machine according to claim 1, characterized in that: The structure of the inner expansion wheel driving device is as follows: an inner expansion wheel power motor and a worm gear transmission are installed on the inner expansion wheel mounting seat, the output shaft of the inner expansion wheel power motor is fixedly connected to the turbine shaft in the worm gear transmission, and the inner expansion wheel is fixed to the bottom of the worm in the worm gear transmission.

6. The large diameter and thick wall ring sizing machine according to claim 1 or 5, characterized in that: The structure of the external pressure wheel driving device is as follows: the cylinder body of the external pressure wheel push-in oil cylinder is fixedly installed on the internal expansion and external pressure machine seat, and the external pressure wheel mounting seat is fixed to the end of the piston rod of the external pressure wheel push-in oil cylinder.

7. The large diameter and thick wall ring sizing machine according to claim 1, characterized in that: The structure of the end face pressure wheel lifting and lowering drive device is as follows: a pair of third slide rails are vertically arranged on the support frame, a plurality of third sliding blocks are arranged on the side wall of the end face pressure wheel seat, and the end face pressure wheel seat is arranged on the pair of third slide rails through each third sliding block; the cylinder body of the end face pressure wheel pressing cylinder is fixedly installed on the support frame, and the end face pressure wheel seat is fixed to the end of the piston rod of the end face pressure wheel pressing cylinder.

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