Steel structure radian control mechanism

Abstract

The invention discloses a steel structure radian control mechanism, a steel structure is provided with a web plate and flanges on the two sides, and the control mechanism comprises a base; the fixed table is arranged at the end of the base, a rotating table is rotationally arranged at one end of the fixed table, a jacking device is rotationally arranged at the other end of the base, and the telescopic end of the jacking device is rotationally arranged on the rotating table; the limiting frame is arranged on the base and located between the fixed table and the rotating table, the base is provided with an adjusting piece, and the adjusting piece is connected to the limiting frame; the limiting wheels are rotationally arranged on the fixing table, the limiting frame and the rotating table respectively, each limiting wheel comprises a rotating shaft, two limiting sleeves arranged on the rotating shaft and two conical sleeves arranged on the rotating shaft, the conical sleeves are located in the limiting sleeves, and the rotating shaft is provided with a transmission part and a fixing part. The mechanism can adapt to I-shaped steel with different web plate widths, the fixing piece is used for adjusting the length, extending out of the limiting sleeve, of the conical sleeve, the conical sleeve can adapt to different flange widths, and radian machining can be conducted on the I-shaped steel with different specifications.

Description

Technical Field

[0001] This invention relates to the field of steel structure processing technology, and specifically to a steel structure curvature control mechanism. Background Technology

[0002] In the field of steel structure manufacturing, especially in the construction of large building frames and heavy equipment support structures, I-beams are widely used as a high-efficiency bending load-bearing component. To meet diverse design requirements and spatial shapes, straight sections of I-beams are often cold-bent or hot-bent to produce a predetermined arc or curve.

[0003] A standard I-beam consists of a central web and two vertical flanges. When subjected to a bending moment, the stress distribution across the cross-section is extremely uneven: one side (outer flange) of the bending neutral layer experiences tension on the flange and web, while the other side experiences compression. This complex stress state, coupled with the relatively wide and thin flanges and the tall and thin web, makes it highly susceptible to cross-sectional distortion during free bending, for example:

[0004] Firstly, under out-of-plane pressure, the flange on the pressure side is prone to lateral buckling, wavy deformation, or edge curling, leading to flange instability.

[0005] Secondly, the web in the compression zone may develop local wrinkles or bulges due to insufficient compressive stability, resulting in web wrinkles.

[0006] Thirdly, due to the incoordination of the deformation of the flange and the web, the entire cross section may undergo torsional deformation around its longitudinal axis, resulting in cross section distortion.

[0007] In response, existing technologies generally employ integral molding with molds. By creating upper and lower integral molds that perfectly match the target curve, the steel structure is placed inside and then pressed into shape in one step. Although the molding quality is good, the mold cost is extremely high and its versatility is poor. However, it is only suitable for mass production of single products with fixed specifications and cannot meet the flexible manufacturing needs of modern steel structure engineering with multiple specifications and small batches. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a steel structure curvature control mechanism, which solves the problems of low finished product accuracy, poor surface quality, and narrow application range of steel structures in bending processes.

[0009] According to an embodiment of the present invention, a steel structure curvature control mechanism is provided, wherein the steel structure has a web and two side flanges, and the control mechanism includes:

[0010] Base;

[0011] A fixed platform is located at the end of the base, and a rotating platform is rotatably provided at one end of the fixed platform, while a lifting device is rotatably provided at the other end of the base, with the telescopic end of the lifting device rotatably provided on the rotating platform.

[0012] A limit frame is mounted on the base and located between the fixed platform and the rotating platform. The base is equipped with an adjustment component connected to the limit frame to adjust the height of the limit frame.

[0013] The limiting wheels are rotatably mounted on a fixed platform, a limiting frame, and a rotating platform. Each limiting wheel includes a rotating shaft, two limiting sleeves mounted on the rotating shaft for limiting the web, and two conical sleeves mounted on the rotating shaft for limiting the flange. The conical sleeves are located inside the limiting sleeves. The rotating shaft is equipped with a transmission component and a fixing component. The transmission component is connected to the two limiting sleeves and is used to adjust the distance between the two limiting sleeves. The fixing component is connected to the conical sleeves and is used to adjust the length of the conical sleeves extending out of the limiting sleeves.

[0014] Preferably, the transmission component includes two lead screws, a rotating shaft with an installation groove, both lead screws being rotatably mounted in the installation groove, and two limit sleeves having a drive block, both drive blocks being slidably engaged in the installation groove and threadedly connected to the two lead screws respectively.

[0015] Preferably, the threads of the two lead screws are turned in opposite directions, and the ends of the two lead screws are connected to each other.

[0016] Preferably, the end of the rotating shaft is provided with an adjusting nut, wherein the end of a lead screw passes through to the end of the rotating shaft and is connected to the adjusting nut.

[0017] Preferably, the fixing component includes an externally threaded sleeve fitted onto the rotating shaft, the externally threaded sleeve being rotatably disposed inside the limiting sleeve, the large end of the tapered sleeve being slidably engaged with the limiting sleeve, and the small end being provided with an internally threaded sleeve, the internally threaded sleeve being threadedly connected to the externally threaded sleeve.

[0018] Preferably, the end of the external threaded sleeve is provided with an adjusting nut.

[0019] Preferably, the conical sleeve has several flat grooves along its conical surface.

[0020] Preferably, the adjusting component includes a telescopic device, which is disposed on the base, and the telescopic end of the telescopic device is fixedly disposed on the bottom of the limiting frame.

[0021] Preferably, the bottom of the limiting frame is provided with several limiting rods, and the limiting rods are all inserted through the base.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In this design, the limiting wheel integrates two limiting sleeves for limiting the web and two tapered sleeves for limiting the flanges. This ensures that the constraint on the entire cross-section of the I-beam is synchronous and coordinated during bending, thus maintaining a near-ideal geometric shape under bending stress. Furthermore, the transmission component adjusts the distance between the two limiting sleeves to accommodate I-beams with different web widths, while the fixing component adjusts the length of the tapered sleeves extending beyond the limiting sleeves, allowing the tapered sleeves to accommodate different flange widths and enabling the machining of curvatures for I-beams of different specifications. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the steel structure installed on the control mechanism in an embodiment of the present invention.

[0025] Figure 2 This is a cross-sectional structural diagram of the control mechanism in an embodiment of the present invention.

[0026] Figure 3 This is a front view schematic diagram of the control mechanism in an embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the structure of the limiting wheel in an embodiment of the present invention, and a cross-sectional view of its AA section.

[0028] In the above attached figures:

[0029] 1. Base;

[0030] 2. Fixed platform;

[0031] 3. Rotating table;

[0032] 4. Lifting device;

[0033] 5. Limiting bracket; 501. Expansion joint; 502. Limiting rod;

[0034] 6. Limiting wheel; 601. Rotating shaft; 602. Limiting sleeve; 603. Conical sleeve; 604. Flat groove; 605. Mounting groove; 606. Lead screw; 607. Drive block; 608. Adjusting nut

[0035] 7. External threaded sleeve; 701. Internal threaded sleeve; 702. Adjusting nut. Detailed Implementation

[0036] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] This invention provides a steel structure curvature control mechanism. The steel structure has a web and two side flanges. The control mechanism includes:

[0038] Base 1;

[0039] Fixed platform 2 is located at the end of base 1, and a rotating platform 3 is rotatably provided at one end of fixed platform 2, and a lifting device 4 is rotatably provided at the other end of base 1, with the telescopic end of lifting device 4 rotatably provided on rotating platform 3.

[0040] Limiting frame 5 is located on base 1 and between fixed platform 2 and rotating platform 3. Base 1 is provided with adjusting component, which is connected to limiting frame 5 and used to adjust the height of limiting frame 5.

[0041] Each limiting wheel 6 is rotatably mounted on a fixed platform 2, a limiting frame 5, and a rotating platform 3. Each limiting wheel 6 includes a rotating shaft 601, two limiting sleeves 602 mounted on the rotating shaft 601 for limiting the web plate, and two conical sleeves 603 mounted on the rotating shaft 601 for limiting the flange. The conical sleeves 603 are located inside the limiting sleeves 602. The rotating shaft 601 is provided with a transmission component and a fixing component. The transmission component is connected to the two limiting sleeves 602 and is used to adjust the distance between the two limiting sleeves 602. The fixing component is connected to the conical sleeves 603 and is used to adjust the length of the conical sleeves 603 extending out of the limiting sleeves 602.

[0042] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, base 1 is the basic installation platform for the entire mechanism, fixedly installed on the ground or workbench. Fixed platform 2 is fixedly set at one end of the length direction of base 1. Rotating platform 3 is rotatably connected to the end of fixed platform 2 through a shaft. Lifter 4 is a jack or hydraulic cylinder. The cylinder end of lifter 4 is rotatably installed at the other end of the length direction of base 1 through a hinge. The telescopic end is also connected to the bottom of rotating platform 3 through a hinge. When lifter 4 extends, it causes rotating platform 3 to rotate around its hinge point with fixed platform 2, thereby realizing the lifting action and causing the I-beam located between the two limit wheels 6 to bend.

[0043] The limiting wheel 6 on the fixed platform 2 is fixed. The limiting wheel 6 on the limiting frame 5 can move up and down with the limiting frame 5, thereby adjusting the distance between the upper limiting wheel 6 on the limiting frame 5 and the upper limiting wheel 6 on the fixed platform 2, so as to accommodate I-beams of different thicknesses. When the curvature of the I-beam is not controlled, that is, when the I-beam is not processed, the limiting wheel 6 on the rotating platform 3 is horizontally aligned with the limiting wheel 6 on the fixed platform 2, which facilitates the installation of the I-beam.

[0044] The core feature is that each limiting wheel 6 includes a horizontal rotating shaft 601, two limiting sleeves 602, and two conical sleeves 603. The two limiting sleeves 602 and the two conical sleeves 603 are coaxially and slidably fitted onto the rotating shaft 601, and each conical sleeve 603 is located in the internal cavity of the corresponding limiting sleeve 602. The conical surfaces of the two conical sleeves 603 are arranged opposite to each other to contact and press against the two flanges of the I-beam from the inside. Under the action of the transmission component, the two limiting sleeves 602 can be driven to slide towards or away from each other along the rotating shaft 601, thereby adjusting the distance between them to accommodate the web of the I-beam with different widths. Under the action of the fixing component, the conical sleeves 603 can be driven to move along their axial direction, thereby adjusting the length of their conical surface extending beyond the end face of the corresponding limiting sleeve 602 to accommodate the flanges of the I-beam with different widths.

[0045] In actual operation, firstly, according to the specifications of the I-beam to be bent, the distance between the two limiting sleeves 602 is adjusted by the transmission component, and the extension length of the two tapered sleeves 603 is adjusted by the fixing component. Then, the straight section of the I-beam is placed on each limiting wheel 6, so that its web is embedded in the two limiting sleeves 602, and its two flanges are respectively in close contact with the conical surface of the two tapered sleeves 603. The lifting device 4 is started to push the rotating table 3 to lift, and the I-beam undergoes arc bending. Preferably, each limiting wheel 6 can be equipped with a drive source, such as a motor installed on the rotating shaft 601 of each limiting wheel 6. Each motor is connected to the controller, and by controlling each motor to rotate synchronously and in the same direction, rolling support is provided.

[0046] Specifically, the structure of the transmission components is optimized, such as... Figure 4 As shown, the transmission component includes two lead screws 606, a rotating shaft 601 with an installation groove 605, both lead screws 606 are rotatably mounted in the installation groove 605, and both limit sleeves 602 are provided with driving blocks 607. Both driving blocks 607 are slidably engaged in the installation groove 605 and are threadedly connected to the two lead screws 606 respectively.

[0047] Each limiting sleeve 602 has a driving block 607 fixedly installed on its inner side. Both driving blocks 607 are slidably engaged in the mounting groove 605 of the rotating shaft 601, ensuring that they can only slide along the axial direction of the rotating shaft 601 and cannot rotate. When it is necessary to adjust the distance between the two limiting sleeves 602 to accommodate I-beam webs of different widths, the driving screw 606 is rotated. Since the driving blocks 607 are restricted from rotating by the mounting groove 605, the rotating screw 606 will drive the driving blocks 607 that are engaged with it under the action of the thread. Sliding along the mounting groove 605, the limiting sleeve 602, which is fixedly connected to the drive block 607, moves synchronously. By controlling the rotation direction and number of turns of the two lead screws 606, the two limiting sleeves 602 can be controlled to move towards or away from each other, thereby adjusting the spacing. Once adjusted, the threads can automatically lock without external force driving the lead screws 606, preventing the limiting sleeves 602 from being accidentally displaced due to vibration or force during operation, and ensuring that the support spacing parameters of the web plate remain constant throughout the bending process.

[0048] To avoid potential asynchrony and asymmetry issues arising from the step-by-step adjustment of the two independent lead screws 606, and to ensure that the centerline of the I-beam web is always precisely aligned with the center of the rotating shaft 601 before, during, and after adjustment, the two lead screws 606 have opposite thread directions and their ends are connected to each other. When adjusting the spacing of the limiting sleeves 602, only the end of one lead screw 606 needs to be rotated. The rotation drive will be synchronously transmitted to the other lead screw 606, and the two drive blocks 607 that mesh with them will produce linear motions in opposite directions under the action of the threads. The entire adjustment process can be completed with a single drive action.

[0049] Furthermore, the end of the rotating shaft 601 is provided with an adjusting nut 608, wherein the end of the lead screw 606 passes through to the end of the rotating shaft 601 and is connected to the adjusting nut 608. The adjusting nut 608 can be relatively fixed to the end of the rotating shaft 601 by means of welding, key connection, etc., so that the operator can use standard wrenches and other tools to perform adjustment operations.

[0050] Specifically, the structure of the fastener is optimized, such as... Figure 4 As shown, the fixing component includes an external threaded sleeve 7 sleeved on the rotating shaft 601. The external threaded sleeve 7 is rotatably disposed inside the limiting sleeve 602. The large end of the tapered sleeve 603 is slidably engaged with the limiting sleeve 602, and the small end is provided with an internal threaded sleeve 701. The internal threaded sleeve 701 is threadedly connected to the external threaded sleeve 7.

[0051] The large end (i.e., the end with the larger diameter) of the tapered sleeve 603 is slidably engaged in the corresponding limiting sleeve 602 through a keyway, sliding key, or other means, so that the tapered sleeve 603 slides axially relative to the limiting sleeve 602, but restricts its relative rotation. The small end (i.e., the side of the tapered tip) of the tapered sleeve 603 is fixedly connected to an internally threaded sleeve 701, which meshes with the externally threaded sleeve 7. When it is necessary to adjust the length of the tapered sleeve 603 extending out of the limiting sleeve 602 to accommodate flanges of different widths, the externally threaded sleeve 7 can be rotated. Since the externally threaded sleeve 7 and the inner wall of the limiting sleeve 602 are in a rotational fit relationship, the externally threaded sleeve 7 can rotate on its own. At this time, the tapered sleeve 603 cannot rotate because it is engaged by the limiting sleeve 602. Under the action of the thread, the internally threaded sleeve 701 and the entire tapered sleeve 603 are translated axially, thereby achieving precise adjustment of the outward extension of the tapered working surface.

[0052] In order to facilitate the adjustment of the external threaded sleeve 7, the end of the external threaded sleeve 7 is provided with an adjusting nut 702. The adjusting nut 702 can be combined with the end of the external threaded sleeve 7 by welding or integral machining. The outer periphery of the adjusting nut 702 is machined into a standard hexagonal, square or shape with a pin hole so as to match the general manual wrench or special lever tool.

[0053] Meanwhile, since the contact between the conical surface and the flange is line contact, in order to improve the stability of the conical sleeve 603 in bearing the flange, such as Figure 4 As shown, the tapered sleeve 603 has several flat grooves 604 along its tapered surface. The flat grooves 604 are in surface contact with the flange, which can resist the lateral slippage generated by the flange during bending and eliminate the risk of local plastic deformation of the flange due to support pressure.

[0054] Specifically, such as Figure 2 As shown, the adjusting component includes a telescopic device 501, which is located on the base 1. The telescopic end of the telescopic device 501 is fixedly located at the bottom of the limiting frame 5. The telescopic device 501 can be a device that can provide linear stroke drive, such as a hydraulic cylinder, an electric push rod, or a pneumatic cylinder. When it is necessary to adjust the height of the limiting frame 5, the height of the limiting frame 5 can be directly controlled by controlling the extension or retraction of the telescopic end of the telescopic device 501, thereby adjusting the height of the upper limit wheel 6 of the limiting frame 5. This is suitable for steel structures of different thicknesses.

[0055] Furthermore, the bottom of the limiting frame 5 is provided with several limiting rods 502, which are all inserted through the base 1. The limiting rods 502 can force the limiting frame 5 to move only in the vertical direction, which can effectively share the lateral force on the expansion joint 501, thereby extending the reliability and service life of the expansion joint 501.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A steel structure curvature control mechanism, wherein the steel structure has a web and flanges on both sides, characterized in that, The control mechanism includes: Base (1); A fixed platform (2) is provided at the end of the base (1), and a rotating platform (3) is rotatably provided at one end of the fixed platform (2), and a lifting device (4) is rotatably provided at the other end of the base (1), with the telescopic end of the lifting device (4) rotatably provided on the rotating platform (3). A limiting frame (5) is provided on the base (1) and located between the fixed platform (2) and the rotating platform (3). The base (1) is provided with an adjusting member, which is connected to the limiting frame (5) and is used to adjust the height of the limiting frame (5). Each of the limiting wheels (6) is rotatably mounted on the fixed platform (2), the limiting frame (5), and the rotating platform (3). Each limiting wheel (6) includes a rotating shaft (601), two limiting sleeves (602) mounted on the rotating shaft (601) for limiting the web plate, and two conical sleeves (603) mounted on the rotating shaft (601) for limiting the flange. The conical sleeves (603) are located inside the limiting sleeves (602). The rotating shaft (601) is provided with a transmission component and a fixing component. The transmission component is connected to the two limiting sleeves (602) for adjusting the distance between the two limiting sleeves (602). The fixing component is connected to the conical sleeves (603) for adjusting the length of the conical sleeves (603) extending out of the limiting sleeves (602).

2. The control mechanism according to claim 1, characterized in that, The transmission component includes two lead screws (606), the rotating shaft (601) is provided with a mounting groove (605), both lead screws (606) are rotatably disposed in the mounting groove (605), both limiting sleeves (602) are provided with driving blocks (607), both driving blocks (607) are slidably engaged in the mounting groove (605) and are threadedly connected to the two lead screws (606) respectively.

3. The control mechanism according to claim 2, characterized in that, The threads of the two lead screws (606) are turned in opposite directions, and the ends of the two lead screws (606) are connected to each other.

4. The control mechanism according to claim 3, characterized in that, The end of the rotating shaft (601) is provided with an adjusting nut (608), wherein the end of one of the lead screws (606) passes through to the end of the rotating shaft (601) and is connected to the adjusting nut (608).

5. The control mechanism according to claim 1, characterized in that, The fixing component includes an external threaded sleeve (7) sleeved on the rotating shaft (601), the external threaded sleeve (7) being rotatably disposed inside the limiting sleeve (602), the large end of the tapered sleeve (603) being slidably engaged with the limiting sleeve (602), and the small end being provided with an internal threaded sleeve (701), the internal threaded sleeve (701) being threadedly connected to the external threaded sleeve (7).

6. The control mechanism according to claim 5, characterized in that, The end of the external threaded sleeve (7) is provided with an adjusting nut (702).

7. The control mechanism according to claim 1, characterized in that, The conical sleeve (603) has several flat grooves (604) along its conical surface.

8. The control mechanism according to claim 1, characterized in that, The adjusting component includes a telescopic device (501), which is located on the base (1), and the telescopic end of the telescopic device (501) is fixedly located at the bottom of the limiting frame (5).

9. The control mechanism according to claim 8, characterized in that, The bottom of the limiting frame (5) is provided with several limiting rods (502), and the several limiting rods (502) are all inserted through the base (1).

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