A vertical adjustable roll press straightening device for arc segments

Abstract

The present application relates to a kind of vertical adjustable roll pressure shaping device for arc segment, comprising: fixed frame, circumferential guide rail, radial guide rail, roll pressure mechanism, circumferential drive mechanism and radial drive mechanism;Wherein: fixed frame is fixed by bolt with circumferential guide rail, circumferential guide rail is slidably connected with radial guide rail, radial guide rail can slide along circumferential guide rail, radial guide rail is slidably connected with roll pressure mechanism, roll pressure mechanism is installed with circumferential drive mechanism and radial drive mechanism, while realizing the circumferential and radial motion of roll pressure mechanism.The vertical adjustable roll pressure shaping device of the present application solves the problems of low efficiency, poor effect and difficult to guarantee profile precision of large storage tank wall plate shaping at present.

Description

TECHNICAL FIELD

[0001] The present application relates to a vertical adjustable roller pressing and shaping device for arc-shaped ring segments, belonging to the technical field of plate shaping. BACKGROUND

[0002] The profile accuracy control of the storage tank is a key technology and a problem in the assembly and manufacturing of the storage tank. With the continuous improvement of the carrying capacity of the rocket, the diameter and thickness size of the fuel storage tank are further increased, and the local stiffness of the structure is increased by several times. After the wall plate is welded, due to the decrease in temperature and the release of elastic deformation, the friction stir welding seam is prone to local contraction and depression, which causes the wall plate of the storage tank to form a concave-convex alternating non-circular profile, increasing the difficulty of profile accuracy control of the wall plate of the storage tank. Therefore, it is essential to use a shaping device to correct the profile of the wall plate of the storage tank.

[0003] A Chinese invention patent with application number 202111444079.3 and the title "Two-roll straightening machine for aluminum alloy profile with ribbed plate" discloses a roller pressing and straightening device for ribbed plates. This device is a typical horizontal roller pressing device, which is not suitable for large-sized storage tank wall plates with large self-weight deformation, and a vertical shaping device for large-sized storage tanks must be developed.

[0004] Due to the limitations of technology and design level, the current vertical shaping device for the wall plate of the storage tank is mostly a small-area shaping device, which loads pressure on the storage tank locally and in a small range through a small clamping mechanism and a jack mechanism. This not only has a small shaping coverage area and low efficiency, but also easily causes uneven plastic deformation at the clamping position, making the profile of the rebounded storage tank more complex.

[0005] Therefore, the technical personnel in the field are committed to developing a vertical adjustable roller pressing and shaping device for arc-shaped ring segments to solve the problems of low efficiency, poor effect, and difficult to guarantee the profile accuracy of the current large-sized storage tank wall plate shaping. SUMMARY

[0006] The technical problem solved by the present application is that the existing vertical shaping device for the storage tank has a small coverage area, low efficiency, and difficult to guarantee the shaping accuracy. A vertical adjustable roller pressing and shaping device for large-sized storage tank wall plates is provided, which adjusts the roller pressing distance and the downward pressure through the circumferential and radial degrees of freedom, realizes high-precision shaping of different curvatures, smooth or ribbed, wall plates or closed ring segments, and improves the shaping efficiency and automation level.

[0007] The technical solution of the present application is:

[0008] A vertical adjustable roller pressing and shaping device for arc-shaped ring segments, comprising: a fixed frame, a circumferential guide rail, a radial guide rail, a roller pressing mechanism, a circumferential driving mechanism, and a radial driving mechanism;

[0009] The fixed frame is fixed to the circumferential guide rail by bolts. The circumferential guide rail is slidably connected to the radial guide rail. The radial guide rail can slide along the circumferential guide rail. The radial guide rail is slidably connected to the roller pressing mechanism. The roller pressing mechanism is equipped with a circumferential drive mechanism and a radial drive mechanism, which simultaneously realize the circumferential and radial movements of the roller pressing mechanism.

[0010] Furthermore, the fixed frame is a vertical beam and a horizontal beam structure, used to connect and support the circumferential guide rails; the two fixed frames are connected by eight circumferential guide rails, with two circumferential guide rails at the top and bottom of the fixed frame and four circumferential guide rails in the middle.

[0011] The circumferential guide rail is an arc-shaped structure, placed horizontally, and coaxial with the tank wall panel. Its radius of curvature is designed based on the radius of the tank wall panel and the width of the calibration space. The fixed frame and the circumferential guide rail form a fan-shaped frame structure. The inside of the fan-shaped frame is the calibration space for the tank ring segment. The tank ring segment passes through the tangential side of the frame and then the calibration operation is performed.

[0012] Furthermore, the radial guide rail is a cuboid structure with a first slider fixed to one side surface. The first slider has an arc-shaped groove with the same curvature as the circumferential guide rail. The first slider is slidably connected to the circumferential guide rail, thereby realizing the circumferential sliding of the radial guide rail on the circumferential guide rail.

[0013] Furthermore, the radial guide rail has a raised slide rail on the other side surface opposite to the mounting of the first slider, which cooperates with the groove of the roller pressing mechanism to form a sliding connection, thereby realizing the radial movement of the roller pressing mechanism on the radial guide rail.

[0014] Furthermore, the rolling mechanism includes a column, a roller, and a roller shaft. The two ends of the column and the roller shaft are fixedly connected. The roller shaft passes through the axis of the roller to form a rotatable connection. The diameter of the roller is designed according to the curvature and deviation of the tank wall panel. The height of the roller is designed according to the specifications and dimensions of the tank ring section and is slightly higher than the height of the tank wall panel. During the shaping process, the roller follows the column to move circumferentially and rotates around the roller shaft to realize the vertical rolling shaping of the tank ring section.

[0015] Furthermore, there are three roller pressing mechanisms in total, two of which are located on the outer side of the tank wall panel and one on the inner side of the tank wall panel. The two outer rollers have the same diameter, and the diameter of the inner roller is designed according to the curvature and deviation of the tank wall panel, and may be the same as or different from the diameter of the rollers of the outer roller pressing mechanism.

[0016] Furthermore, the circumferential drive mechanism includes a first motor, a spur gear, and a rack. The first motor is fixedly connected to the radial guide rail, and the first motor and the spur gear are connected by a flat key. The rack is an arc rack, fixed to the ground, and located on the inner and outer sides of the tank wall panel respectively. The inner and outer racks have the same module, and the ratio of the number of gears is the same as the ratio of the radius of curvature of the rack, so as to realize the coaxial movement of the inner and outer roller pressing mechanisms. After the first motor is started, the spur gear and the rack mesh and drive the roller pressing mechanism to move circumferentially along the circumferential guide rail, and sequentially roll and shape the tank wall panel.

[0017] Furthermore, the radial drive mechanism includes a second motor, a coupling, a ball screw, a second slider, and a third slider;

[0018] The second motor's shaft is connected to the coupling via a flat key, and the other end of the coupling is connected to a ball screw. The inner wall of the circular through hole of the second slider is threaded, and the ball screw passes through the circular through hole of the second slider and is connected to the roller pressing mechanism via a passive rotating pair. The upper and lower surfaces of the second slider have arc-shaped grooves that are slidably connected to two central circumferential guide rails to constrain radial degrees of freedom.

[0019] In addition, the second motor is fixedly connected to the third slider and slidably connected to the raised slide rail on the surface of the second slider; after the second motor is started, under the constraint of the circumferential guide rail and the first motor, the ball screw controls the radial movement of the roller pressing mechanism, thereby changing the amount of downward pressure of the roller.

[0020] Furthermore, the roller pressing mechanism slides on the radial guide rail, while the radial guide rail slides freely on the circumferential guide rail, thus enabling the roller pressing mechanism to simultaneously achieve free sliding in both the radial and circumferential directions.

[0021] Furthermore, a method for vertically rolling and straightening a large storage tank ring segment using the aforementioned vertical adjustable rolling and straightening device for arc-shaped ring segments includes:

[0022] Step 1: Place the tank ring section vertically on the ground, install and connect the fixed frame and the circumferential guide rail, install the rack on the ground, so that the tank ring section passes through the fan-shaped frame formed by the fixed frame and the circumferential guide rail, and the circumferential guide rail, the rack and the tank ring section are coaxial.

[0023] Step 2: The first motor drives the spur gear and rack to mesh and control the roller pressing mechanism to move along the circumferential guide rail until it reaches the initial roller pressing position, and then the first motor is turned off;

[0024] Step 3: The second motor drives the coupling and ball screw transmission to control the roller pressing mechanism to move along the radial guide rail until the target roller pressing amount is reached, and then the second motor is turned off;

[0025] Step 4: Simultaneously start the three first motors, and the roller pressing mechanism moves circumferentially, with the rollers pressing and shaping the tank wall panels;

[0026] Step 5: After the roll forming of this section is completed, move the fixed frame and circumferential guide rail to the next tank section that needs to be formed, and repeat steps one to four.

[0027] Step 6: After all sections have been shaped, the second motor controls the roller pressing mechanism to retract radially, and then the fixed frame and circumferential guide rail are disassembled.

[0028] The advantages of this invention compared to the prior art are:

[0029] (1) The present invention has a large coverage area and high efficiency in the correction process. Existing tank wall panel correction devices use small clamping mechanisms and jack mechanisms, which can only perform localized and small-scale pressure correction on the tank. The present invention uses a sliding rail roller pressing correction, which can perform large-scale pressure correction on the tank wall panel. The roller shaft can be moved along the sliding rail to cover the entire tank wall panel, resulting in a large correction coverage area and high efficiency.

[0030] (2) The present invention has good effect and high calibration accuracy. The roller shaft and the fixed frame in the present invention are connected by a ball screw. For different curvature calibration requirements, the roller shaft can be moved along the guide rail to adjust the radial downward pressure of the roller shaft. In addition, the rack module of the guide rail where the inner and outer roller shafts are located is the same, and the ratio of the number of gears is consistent with the diameter of the rack curvature radius, which can ensure that the roller pressing mechanism moves coaxially, resulting in good calibration effect and high accuracy.

[0031] (3) The present invention has wide applicability. The present invention achieves high-precision shaping of different curvatures, smooth or ribbed, wall panels or closed loop segments by adjusting the roller spacing and pressing amount by adjusting the circumferential and radial degrees of freedom. It has wide applicability and high shaping efficiency and automation. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the fixed frame and circumferential guide rail of the present invention;

[0034] Figure 3 This is a schematic diagram of the radial guide rail of the present invention;

[0035] Figure 4 This is a schematic diagram of the roller pressing mechanism of the present invention;

[0036] Figure 5 This is a schematic diagram of the circumferential drive mechanism of the present invention;

[0037] Figure 6 This is a schematic diagram of the radial drive mechanism of the present invention;

[0038] Figure 7This is a structural diagram showing the process of shaping the tank wall panels.

[0039] In the attached diagram: 1-Fixed frame, 2-Circumferential guide rail, 3-Radial guide rail, 31-Slider 1, 4-Roller pressing mechanism, 41-Column, 42-Roller, 43-Roller shaft, 5-Circumferential drive mechanism, 51-Motor 1, 52-Spur gear, 53-Rack, 6-Radial drive mechanism, 61-Motor 2, 62-Coupling, 63-Ball screw, 64-Slider 2, 65-Slider 3, 7-Tank wall panel. Detailed Implementation

[0040] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0041] like Figure 1 As shown, this embodiment of the invention provides a vertical adjustable roller pressing and shaping device for a large storage tank ring section, including a fixed frame 1, a circumferential guide rail 2, a radial guide rail 3, a roller pressing mechanism 4, a circumferential drive mechanism 5, and a radial drive mechanism 6. The fixed frame 1 is fixedly connected to the circumferential guide rail 2 by bolts. The circumferential guide rail 2 is slidably connected to the radial guide rail 3. The radial guide rail 3 is slidably connected to the roller pressing mechanism 4. The roller pressing mechanism 4 is equipped with the circumferential drive mechanism 5 and the radial drive mechanism 6, which can simultaneously realize the circumferential and radial movements of the roller pressing mechanism.

[0042] like Figure 2 As shown, the fixed frame 1 is a structure of vertical and horizontal beams, used to connect and support the circumferential guide rails 2. There are eight circumferential guide rails 2 in total: two at the top, two at the bottom, and four in the middle. The circumferential guide rails 2 are arc-shaped structures, placed horizontally, and coaxial with the tank wall panel. Their radius of curvature is designed based on the radius of the tank wall panel and the width of the calibration space. The fixed frame 1 and the circumferential guide rails 2 form a fan-shaped frame structure. The interior of the frame is the calibration space for the tank ring segment. The tank ring segment can pass through the tangential side of the frame for calibration operations.

[0043] like Figure 1 and Figure 3 As shown, a slider 31 is fixedly connected to one side surface of the radial guide rail 3. The slider 31 has an arc-shaped groove with the same curvature as the circumferential guide rail 2. The slider 31 is slidably connected to the circumferential guide rail 2, thereby realizing the circumferential sliding of the radial guide rail 3 on the circumferential guide rail 2.

[0044] like Figure 3 and Figure 4 As shown, the other side surface of the radial guide rail 3 is provided with a raised slide rail, which cooperates with the groove of the roller pressing mechanism 4 to form a sliding connection, thereby realizing the radial movement of the roller pressing mechanism 4 on the radial guide rail 3.

[0045] like Figure 1As shown, the roller pressing mechanism 4 can slide on the radial guide rail 3, while the radial guide rail 3 can slide freely on the circumferential guide rail 4. Therefore, the roller pressing mechanism 4 can simultaneously achieve free sliding in both the radial and circumferential directions.

[0046] like Figure 4 As shown, the rolling mechanism 4 includes a column 41, a roller 42, and a roller shaft 43. The two ends of the column 41 and roller shaft 43 are fixedly connected. The roller shaft 43 passes through the axis of the roller 42, forming a rotatable connection. The diameter of the roller 42 is designed according to the curvature and deviation of the tank wall panel. The height of the roller 42 is designed according to the specifications and dimensions of the tank ring section, and should be slightly higher than the height of the tank wall panel. During the shaping process, the roller 42 moves circumferentially along with the column 41, while simultaneously rotating around the roller shaft 43, achieving vertical rolling shaping of the tank ring section.

[0047] like Figure 1 As shown, there are three roller pressing mechanisms 4 in total, two of which are located on the outer side of the wall panel and one on the inner side of the wall panel. The two outer rollers 42 have the same diameter, and the diameter of the inner roller 42 is designed according to the curvature and deviation of the storage tank wall panel, and can be the same as or different from the diameter of the rollers of the outer roller pressing mechanism.

[0048] like Figure 5 As shown, the circumferential drive mechanism 5 includes a motor 51, a spur gear 52, and a rack 53. The motor 51 is fixedly connected to the radial guide rail 6, and the motor 51 and the spur gear 52 are connected by a key. The rack 53 is an arc-shaped rack, fixed to the ground, located on the inner and outer sides of the wall panel respectively. The inner and outer racks have the same module, and the ratio of the number of gears to the ratio of the rack's radius of curvature is the same, to achieve coaxial movement of the inner and outer roller pressing mechanisms. After starting the motor 51, the spur gear 52 and the rack 53 mesh, driving the roller pressing mechanism 4 to move circumferentially along the circumferential guide rail 2, sequentially rolling and shaping the tank wall panel.

[0049] like Figure 1 and Figure 6 As shown, the radial drive mechanism 6 includes a second motor 61, a coupling 62, a ball screw 63, a second slider 64, and a third slider 65. The shaft of the second motor 61 is connected to the coupling 62 via a key, and the other end of the coupling 62 is connected to the ball screw 63. The inner wall of the circular through-hole of the second slider 64 is threaded, and the ball screw 63 passes through the circular through-hole of the second slider 64 and is connected to the roller pressing mechanism (4) via a passive rotating pair. The upper and lower surfaces of the second slider 64 have arc-shaped grooves that are slidably connected to two central circumferential guide rails 2, constraining radial freedom. Furthermore, the second motor is fixedly connected to the third slider 65 and slidably connected to the raised guide rails on the surface of the second slider 64. After the second motor 61 is started, under the constraint of the circumferential guide rails 2 and the first motor 51, the ball screw 63 controls the radial movement of the roller pressing mechanism 4, thereby changing the downward pressure of the roller 42.

[0050] like Figure 7 As shown, the forming process of the vertical roller forming device for large storage tank rings specifically includes the following steps:

[0051] Step a) The tank ring 7 is placed on the ground in an upright position. The fixed frame 1 and the circumferential guide rail 2 are installed and connected. The rack 53 is installed on the ground so that the tank ring 7 passes through the fan-shaped frame formed by the fixed frame 1 and the circumferential guide rail 2. The circumferential guide rail 2, the rack 53 and the tank ring 7 are coaxial.

[0052] Step b) Motor 51 drives spur gear 52 and rack 53 to mesh and transmit power, controlling the roller pressing mechanism 4 to move along the circumferential guide rail 2 to reach the initial roller pressing position, and then motor 51 is turned off;

[0053] Step c) Motor 2 61 drives coupling 62 and ball screw 63 to control the roller pressing mechanism 4 to move along radial guide rail 3 to reach the target roller pressing amount, and then motor 2 61 is turned off;

[0054] Step d) Simultaneously start three motors 51, roll pressing mechanism 4 moves circumferentially, and rollers 42 roll pressing and shaping the tank wall panel;

[0055] After the roll forming of this section is completed in step e), move the fixed frame 1 and the circumferential guide rail 2 to the next tank section that needs to be formed, and repeat steps b)-d).

[0056] Step f) After all sections have been shaped, motor 261 controls the roller pressing mechanism 4 to retract radially, and then the fixed frame 1 and the circumferential guide rail 2 are disassembled.

[0057] The parts of this invention not described in detail are common knowledge to those skilled in the art.

Claims

1. A vertical adjustable roller forming device for arc-shaped segments, characterized in that... include: Fixed frame (1), circumferential guide rail (2), radial guide rail (3), rolling mechanism (4), circumferential drive mechanism (5) and radial drive mechanism (6); Wherein: the fixed frame (1) is fixedly connected to the circumferential guide rail (2) by bolts, the circumferential guide rail (2) is slidably connected to the radial guide rail (3), the radial guide rail (3) can slide along the circumferential guide rail (2), the radial guide rail (3) is slidably connected to the roller pressing mechanism (4), the roller pressing mechanism (4) is equipped with a circumferential drive mechanism (5) and a radial drive mechanism (6), and the circumferential and radial movements of the roller pressing mechanism (4) are realized at the same time; The roller pressing mechanism (4) includes a column (41), a roller (42) and a roller shaft (43). The two ends of the column (41) and the roller shaft (43) are fixedly connected. The roller shaft (43) passes through the axis of the roller (42) to form a rotating connection. The diameter of the roller is designed according to the curvature and deviation of the tank wall panel. The height of the roller (42) is designed according to the specifications and dimensions of the tank ring section and is slightly higher than the height of the tank wall panel. During the straightening process, the roller (42) moves circumferentially with the column (41) and rotates around the roller shaft (43) to realize the vertical roller pressing straightening of the tank ring section. There are three roller pressing mechanisms (4), two of which are located on the outside of the tank wall and one is located on the inside of the tank wall. The two outer rollers (42) have the same diameter, and the diameter of the inner roller (42) is designed according to the curvature and deviation of the tank wall, and is the same as or different from the diameter of the rollers of the outer roller pressing mechanism. The circumferential drive mechanism (5) includes a first motor (51), a spur gear (52), and a rack (53). The first motor (51) is fixed to the radial guide rail, and the first motor (51) and the spur gear (52) are connected by a flat key. The rack (53) is an arc rack, fixed to the ground, located on the inner and outer sides of the tank wall panel respectively. The inner and outer racks have the same module, and the ratio of the number of gears is the same as the ratio of the radius of curvature of the rack, so as to realize the coaxial movement of the inner and outer roller pressing mechanisms. After the first motor (51) is started, the spur gear (52) and the rack (53) mesh and drive the roller pressing mechanism (4) to move circumferentially along the circumferential guide rail (2) in sequence to roll and shape the tank wall panel. The radial drive mechanism (6) includes a second motor (61), a coupling (62), a ball screw (63), a second slider (64), and a third slider (65). Among them, the shaft of the second motor (61) is connected to the coupling (62) by a flat key, and the other end of the coupling (62) is connected to the ball screw (63). The inner wall of the circular through hole of the second slider (64) is provided with threads. The ball screw (63) passes through the circular through hole of the second slider (64) and is connected to the roller pressing mechanism (4) through a passive rotating pair. The upper and lower surfaces of the second slider (64) have arc-shaped grooves, which are slidably connected to the two central circumferential guide rails (2) to constrain the radial degree of freedom. In addition, the second motor (61) is fixedly connected to the third slider (65) and slidably connected to the raised slide rail on the surface of the second slider (64); after the second motor (61) is started, under the constraint of the circumferential guide rail (2) and the first motor (51), the ball screw (63) controls the radial movement of the roller pressing mechanism (4), thereby changing the amount of downward pressure of the roller (42).

2. The vertical adjustable roller pressing and shaping device for arc-shaped ring segments according to claim 1, characterized in that: The fixed frame (1) is a vertical beam and a horizontal beam structure, used to connect and support the circumferential guide rails (2); the two fixed frames (1) are connected by eight circumferential guide rails (2), and there are two circumferential guide rails (2) at the top and bottom of the fixed frame (1) and four circumferential guide rails (2) in the middle. The circumferential guide rail (2) is an arc-shaped structure, placed horizontally, and coaxial with the tank wall panel. Its radius of curvature is designed according to the radius of the tank wall panel and the width of the calibration space. The fixed frame (1) and the circumferential guide rail (2) form a fan-shaped frame structure. The inside of the fan-shaped frame is the calibration space of the tank ring segment. The tank ring segment passes through the tangential side of the frame and then performs calibration operations.

3. The vertical adjustable roller pressing and shaping device for arc-shaped ring segments according to claim 2, characterized in that: The radial guide rail (3) is a cuboid structure with a first slider (31) fixed to one side surface. The first slider (31) has an arc-shaped groove with the same curvature as the circumferential guide rail (2). The first slider (31) is slidably connected to the circumferential guide rail (2), thereby realizing the circumferential sliding of the radial guide rail (3) on the circumferential guide rail (2).

4. The vertical adjustable roller forming device for arc-shaped segments according to claim 3, characterized in that: The radial guide rail (3) has a raised slide rail on the other side surface opposite to the mounting first slider (31), which cooperates with the groove of the roller pressing mechanism (4) to form a sliding connection, thereby realizing the radial movement of the roller pressing mechanism (4) on the radial guide rail (3).

5. A vertical adjustable roller forming device for arc-shaped segments according to claim 1, characterized in that: The roller pressing mechanism (4) slides on the radial guide rail (3), while the radial guide rail (3) slides freely on the circumferential guide rail, thus the roller pressing mechanism (4) simultaneously achieves free sliding in both the radial and circumferential directions.

6. A method for vertical roller pressing and straightening of a large storage tank ring segment using the vertical adjustable roller pressing and straightening device for arc-shaped ring segments as described in claim 1, characterized in that... include: Step 1: The tank ring section (7) is placed on the ground in an upright position. The fixed frame (1) and the circumferential guide rail (2) are installed and connected. The rack (53) is installed on the ground so that the tank ring section (7) passes through the fan-shaped frame formed by the fixed frame (1) and the circumferential guide rail (2). The circumferential guide rail (2), the rack (53) and the tank ring section (7) are coaxial. Step 2: The first motor (51) drives the spur gear (52) and rack (53) to mesh and transmit power, controlling the roller pressing mechanism (4) to move along the circumferential guide rail (2) to reach the initial roller pressing position, and then the first motor (51) is turned off. Step 3: The second motor (61) drives the coupling (62) and ball screw (63) to control the roller pressing mechanism (4) to move along the radial guide rail (3) to reach the target roller pressing amount, and then the second motor (61) is turned off. Step 4: Simultaneously start the three first motors (51), the roller pressing mechanism (4) moves in the circumferential direction, and the rollers (42) roll and shape the tank wall panels; Step 5: After the roll forming of this section is completed, move the fixed frame (1) and the circumferential guide rail (2) to the next tank section that needs to be formed, and repeat steps one to four. Step 6: After all sections have been shaped, the second motor (61) controls the roller pressing mechanism (4) to exit radially, and then the fixed frame (1) and the circumferential guide rail (2) are disassembled.

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