Polishing device for curtain wall steel structure

Abstract

This invention discloses a grinding device for curtain wall steel structures, relating to the field of grinding the inner walls of steel components. It includes an internal grinding mechanism and a head assembly. The head assembly includes a sealing plate and an arc-shaped cone. The large-diameter end of the arc-shaped cone is fixedly connected to the sealing plate. Both ends of the arc-shaped steel component are inserted into the arc-shaped cone to seal both ends of the arc-shaped steel component. The interior of the arc-shaped steel component is filled with abrasive grains. The internal grinding mechanism includes a grinding base, a drive disc, a radius grinding rod, and a tooling assembly. The drive disc is rotatably mounted on the grinding base, with its rotation axis vertically set. The radius grinding rod is a telescopic structure, with both ends connected to the drive disc and the tooling assembly, respectively. The tooling assembly is used to clamp the arc-shaped steel component. The drive disc drives the arc-shaped steel component to perform reciprocating deflection motion to form an arc-shaped grinding trajectory. This effectively solves the problems of over-grinding, local impact pits, and uneven roughness caused by the inertial impact of traditional abrasive flow on the arc-shaped inner wall.

Description

Technical Field

[0001] This invention relates to the field of grinding the inner walls of steel components, specifically a grinding device for curtain wall steel structures. Background Technology

[0002] With the continuous development of modern architectural aesthetics and structural design, curtain wall steel structures have become the core support system for large public buildings and irregularly shaped curved buildings. Among them, curved steel components are increasingly widely used in curtain wall projects because they can perfectly adapt to the streamlined appearance of single-curved and double-curved curtain walls and can achieve high-precision assembly requirements such as pin hinges, sleeve insertions, and pipe truss intersections. The processing quality of the inner wall of curved steel components directly determines their connection accuracy, stress stability, and service life. The inner wall needs to be free of welding burrs, oxide scale, and slag, and the surface must be smooth. Therefore, inner wall grinding is an indispensable key process in the production and processing of curved steel components.

[0003] Currently, the grinding of the inner walls of curved steel components is divided into manual grinding and mechanical grinding. Manual grinding is inefficient and has poor precision: the inner wall space of curved steel components is narrow, the curvature is continuous and the direction is arc-shaped, and manual use of tools such as wire brushes and grinding strips cannot penetrate deep into the component. Only simple processing can be done near the ends, and the deep inner wall is not ground thoroughly, which easily leads to problems such as uneven grinding, missed grinding, and local over-grinding. It is labor-intensive and has extremely low processing efficiency. Mechanical grinding includes grinding wheel grinding and abrasive flow grinding. Grinding wheel equipment uses linear feed or fixed axis rotation grinding, which cannot follow the arc trajectory of curved steel. The grinding wheel does not fit the inner wall well enough, which not only makes it difficult to achieve uniform grinding of the entire inner wall, but also easily scratches the inner wall of the component and damages the dimensional accuracy. In addition, the grinding length of curved steel components is limited, making it completely unsuitable for the inner wall processing of curved steel components. Existing abrasive grinding methods all rely on driving a linear flow of abrasive particles to grind the inner wall. However, curved steel components have a fixed curvature and an arc-shaped trajectory. When the abrasive particles move along the arc-shaped path of the curved steel component, due to their own linear motion inertia, they cannot smoothly slide along the arc-shaped inner wall. Instead, they continuously impact the inner arc surface of the curved steel component, preventing the abrasive particles from completely passing through the arc-shaped path. They are stopped by the arc surface, resulting in a low grinding coverage area on the inner wall of the curved steel component. This impact-type grinding directly leads to problems such as over-grinding, localized impact pits, and uneven surface roughness on the inner wall of the curved steel component. Not only does it fail to meet the requirements for inner wall smoothness, but it also damages the dimensional accuracy and structural integrity of the inner wall, significantly reducing the connection quality and service life of the curved steel component.

[0004] In summary, the existing technology lacks a dedicated grinding device for the inner wall of curved steel components to solve the problems of difficult, low-precision, and inefficient grinding of the inner wall of curved steel components. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a grinding device for curtain wall steel structures, solving the problem of the difficulty in grinding the inner wall of curved steel components.

[0006] The objective of this invention is achieved through the following technical solution: a grinding device for a curtain wall steel structure, comprising an abrasive grinding mechanism and a head member, wherein the head member comprises a sealing plate and an arc-shaped cone, the large-diameter end of the arc-shaped cone is fixedly connected to the sealing plate, and arc-shaped cones are respectively inserted into both ends of the arc-shaped steel component to seal both ends of the arc-shaped steel component, and the interior of the arc-shaped steel component is filled with abrasive particles;

[0007] The abrasive grinding mechanism includes a grinding base, a drive disk, a radius grinding rod, and a tooling assembly. The drive disk is rotatably mounted on the grinding base, and the rotation axis of the drive disk is vertically set. The radius grinding rod is a telescopic structure, and its two ends are respectively connected to the drive disk and the tooling assembly. The tooling assembly is used to clamp the arc-shaped steel component. The drive disk drives the arc-shaped steel component to perform reciprocating deflection motion to form an arc-shaped grinding trajectory.

[0008] Furthermore, the abrasive grinding mechanism also includes a load base, on which two bearing seats are fixed at intervals. A rotating shaft is provided between the two bearing seats. The rotating shaft is rotatably connected to the bearing seats. A rotating motor is installed on one of the bearing seats. The output shaft of the rotating motor is driven and connected to the rotating shaft. The grinding base is fixedly mounted on the rotating shaft.

[0009] Furthermore, a main shaft is coaxially fixed to the bottom of the drive disk. The main shaft is rotatably mounted on the grinding base via bearings. The bottom of the grinding base is provided with an intermittent reciprocating drive mechanism, which includes a motor mounting plate and a drive motor. The motor mounting plate is fixedly connected to the grinding base, and the drive motor is mounted on the motor mounting plate. The output shaft of the drive motor is connected to an intermittent bevel gear. A first bevel gear and a second bevel gear are fitted opposite each other on the main shaft, and the first bevel gear and the second bevel gear alternately mesh with the intermittent bevel gear.

[0010] Furthermore, the radius grinding rod includes a main body rod and an adjusting rod. One end of the main body rod is fixedly connected to the drive disk, and the other end is provided with a mounting hole. One end of the adjusting rod is slidably adapted to the mounting hole, and the other end is connected to the tooling assembly.

[0011] Furthermore, the main body rod has locking cavities on both sides of the mounting hole, and a locking window communicating with the locking cavity is opened on the side wall of the mounting hole. The main body rod has a power cavity above the mounting hole, and the locking cavity communicates with the power cavity. A transverse locking block and a longitudinal locking block are provided in the locking cavity. One end of the transverse locking block is slidably adapted to the locking window, and the other end is provided with an inclined surface. A pressure plate is slidably provided in the power cavity. Both ends of the longitudinal locking block contact the inclined surface and the pressure plate, respectively. The moving direction of the pressure plate coincides with the moving direction of the adjusting rod. A locking cam is provided at the end of the pressure plate away from the longitudinal locking block. A locking screw is fixedly passed through the locking cam. The locking screw is threadedly connected to the main body rod, and the screw head of the locking screw is located outside the main body rod.

[0012] Furthermore, the tooling assembly includes an L-shaped base plate, a tooling pressure plate, and a tooling screw. The radius grinding rod is connected to the L-shaped base plate in the tooling assembly. A T-shaped groove is vertically formed on the inner wall of the L-shaped base plate. A T-shaped slider is fixed on the tooling pressure plate. The T-shaped slider is slidably adapted to the T-shaped groove. The tooling pressure plate and the L-shaped base plate form a U-shape. Both the tooling pressure plate and the L-shaped base plate have through holes. The tail of the tooling screw is threaded through the through hole and connected to a locking nut.

[0013] Furthermore, the sidewall of the sealing plate is provided with multiple friction locking pairs along its own circumference. The friction locking pairs include friction side plates, friction pressure plates and screws. The friction side plates are fixedly connected to the sealing plate. The screws are threaded through the friction side plates. The tail of the screws is connected to the friction pressure plates. The friction pressure plates are located between the friction side plates of the arc-shaped cone. A rubber pad is fixed to one end of the friction pressure plate near the arc-shaped cone.

[0014] Furthermore, a port grinding mechanism is provided on the load base. The port grinding mechanism includes a port grinding base, a feed seat, a grinding turntable, and grinding components. The port grinding base is mounted on the load base, the feed seat is slidably mounted on the port grinding base, and the grinding turntable is rotatably mounted on the feed seat. Multiple grinding components are arranged along the circumference of one end of the grinding turntable. Each grinding component includes a thin rod, a grinding crossbar, and grinding wires. One end of the thin rod is fixedly connected to the grinding crossbar. The thin rod is perpendicular to the grinding crossbar and parallel to the axis of the grinding turntable. Several grinding wires are fixedly connected to the grinding crossbar.

[0015] Furthermore, the grinding turntable has a radial groove at the location where the grinding components are set. A radial slider is slidably disposed in the radial groove. The end of the thin rod away from the grinding crossbar is fixedly connected to the radial slider. A guide rod is fixed on the radial slider. The guide rod slidably passes through the grinding turntable. A spring is sleeved on the guide rod. One end of the spring is connected to the radial slider, and the other end is connected to the side wall of the radial groove.

[0016] Furthermore, a second cylinder is installed on the port grinding base, the telescopic shaft of the second cylinder is connected to the feed seat, a grinding motor is installed on the feed seat, the output shaft of the grinding motor is connected to the drive gear, and a driven gear is fitted on the grinding turntable, the driven gear meshing with the drive gear.

[0017] The beneficial effects of this invention are:

[0018] 1. By driving the curved steel component through a drive disc, a reciprocating deflection motion is achieved. Combined with the abrasive particles filling the curved steel component and the guidance of the inner wall of the component, the abrasive particles form a smooth sliding trajectory along the curved inner wall. This completely eliminates the linear motion mode of existing abrasive flow grinding, effectively solving problems such as over-grinding, local impact pits, and uneven roughness caused by inertial impaction of the curved inner wall in traditional abrasive flow grinding. At the same time, under the reciprocating deflection action, the abrasive particles can fully cover the deep inner wall of the curved steel component, avoiding missed grinding and uneven grinding, significantly improving the grinding accuracy and surface finish of the inner wall, and ensuring the connection accuracy, stress stability, and service life of the component.

[0019] 2. The radius grinding rod adopts a telescopic adjustable structure to adapt to arc-shaped steel components with different curvature radii and lengths; in addition, the arc-shaped conical structure of the end cap can adapt to the port of the component with different diameters. The friction locking pair is locked with the outer wall of the component by friction through the rubber pad, which further enhances the sealing stability and avoids abrasive leakage, while adapting to the sealing requirements of ports with different diameters.

[0020] 3. To ensure that the abrasive grains can move smoothly inside the curved steel component, and to prevent the abrasive grains from completely filling the curved steel component and thus failing to cover the inner top wall area of ​​the curved steel component, the grinding base is rotated 180° by flipping the shaft, so that the inner top wall of the curved steel component is facing down and covered by the abrasive grains, and the abrasive grinding action is performed again to achieve comprehensive grinding of the curved steel component and avoid the problem of missed grinding.

[0021] 4. Since end caps are required to seal both ends of the curved steel component, abrasive grinding blind spots are created at both ends of the curved steel component. Therefore, the inner walls of both ends of the curved steel component are first ground by the port grinding mechanism, and then abrasive grinding is performed to achieve full grinding of the curved steel component. Moreover, the grinding wire of the grinding component can be adjusted according to the shape and size of the inner wall of the curved steel component, which can adapt to the grinding of the inner wall of the curved steel component with different shapes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a grinding device for a curtain wall steel structure according to the present invention. Figure 1 ;

[0023] Figure 2This is a schematic diagram of the structure of a grinding device for a curtain wall steel structure according to the present invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the structure of a grinding device for a curtain wall steel structure according to the present invention. Figure 3 ;

[0025] Figure 4 This is a schematic diagram of the structure of a grinding device for a curtain wall steel structure according to the present invention. Figure 4 ;

[0026] Figure 5 for Figure 2 Enlarged view at point C;

[0027] Figure 6 for Figure 3 Enlarged view at point D;

[0028] Figure 7 This is a schematic diagram of the radius grinding rod in a grinding device for a curtain wall steel structure according to the present invention;

[0029] Figure 8 for Figure 7 Sectional view along line AA;

[0030] Figure 9 for Figure 7 Sectional view along the BB direction;

[0031] Figure 10 for Figure 8 Enlarged view at point E in the middle;

[0032] Figure 11 for Figure 4 Enlarged view at point F;

[0033] Figure 12 for Figure 4 Enlarged view at point G;

[0034] Figure 13 for Figure 2 Enlarged view at point H;

[0035] Figure 14 This is a schematic diagram of the internal structure of the grinding base in a grinding device for a curtain wall steel structure according to the present invention;

[0036] In the diagram, 1-sealing plate, 2-arc cone cylinder, 4-grinding base, 5-drive disc, 6-radius grinding rod, 7-load base, 8-bearing seat, 9-tilting shaft, 10-tilting motor, 11-spindle, 12-motor mounting plate, 13-drive motor, 14-intermittent bevel gear, 15-first bevel gear, 16-second bevel gear, 17-main body rod, 18-adjusting rod, 19-mounting hole, 20-locking cavity, 21-locking window, 22-power cavity, 23-lateral locking block, 24-longitudinal locking block, 25-sloping surface, 26-pressure plate, 27-locking cam, 28-locking screw, 29-L-shaped base plate, 30-tooling pressure plate, 31-... - T-slot, 32- T-slider, 33- Tooling screw, 34- Locking nut, 35- Friction side plate, 36- Friction pressure plate, 37- Screw, 38- Rubber pad, 39- Port grinding base, 40- Feed seat, 41- Grinding turntable, 42- Thin rod, 43- Grinding crossbar, 44- Grinding wire, 45- Radial groove, 46- Radial slider, 47- Guide rod, 48- Spring, 49- First cylinder, 50- Second cylinder, 51- Grinding motor, 52- Drive gear, 53- Driven gear, 54- Main shaft inner cavity, 55- Shaft locking plate, 56- Shaft locking screw, 57- Elastic pad, 59- Conical cylinder, 60- Arc-shaped protrusion. Detailed Implementation

[0037] Example 1

[0038] like Figures 1 to 14As shown, a grinding device for a curtain wall steel structure includes an internal grinding mechanism and a head member. The head member includes a sealing plate 1 and an arc-shaped cone 2. The large-diameter end of the arc-shaped cone 2 is fixedly connected to the sealing plate 1. The arc-shaped cone 2 is inserted into both ends of the arc-shaped steel component to seal both ends of the arc-shaped steel component. The interior of the arc-shaped steel component is filled with abrasive grains. It should be noted that the interior of the arc-shaped steel component should not be completely filled with abrasive grains; space must be left for the abrasive grains to move to avoid grinding failure due to insufficient space for the abrasive grains to move. Problem: When filling with abrasive grains, first use a head cap to seal one end of the arc-shaped steel component, then fill with abrasive grains. After filling, use another head cap to seal the other end of the arc-shaped steel component. The grinding mechanism inside the abrasive grains includes a grinding base 4, a drive disc 5, a radius grinding rod 6, and a tooling assembly. The drive disc 5 is rotatably mounted on the grinding base 4, and the rotation axis of the drive disc 5 is vertically set. The radius grinding rod 6 is a telescopic structure, and its two ends are respectively connected to the drive disc 5 and the tooling assembly. The component is used to clamp the arc-shaped steel component. The drive disk 5 drives the arc-shaped steel component to perform reciprocating deflection motion to form an arc-shaped grinding trajectory. After the arc-shaped steel component is filled with abrasive grains, the tooling assembly mounts the arc-shaped steel component onto the abrasive grain grinding mechanism. The position of the arc-shaped steel component is adjusted so that the tooling assembly clamps it at the middle position. Then, the length of the radius grinding rod 6 is adjusted so that the center of the arc-shaped steel component coincides with the center of the drive disk 5, or the center of the arc-shaped steel component approaches the center of the drive disk 5. The drive disc 5 enables the arc-shaped steel component to reciprocate along its own arc-shaped trajectory. The force exerted by the drive disc 5 on the arc-shaped steel component is greater than the frictional force of the abrasive grains within the arc-shaped steel component. This allows the abrasive grains to form a smooth sliding trajectory along the inner wall of the arc, preventing the abrasive grains from rigidly impacting the inner wall of the arc-shaped steel component. This completely eliminates the linear motion mode of existing abrasive flow grinding and effectively solves the problems of over-grinding, local impact pits, and uneven roughness caused by the inertial impact of traditional abrasive flow on the inner wall of the arc. It should be noted that current linear abrasive grinding methods involve spraying abrasive particles into the curved steel component using a sandblasting machine. The abrasive particles impact the inner wall of the curved steel component at high speed in a straight line, causing rigid impacts that prevent the particles from moving smoothly along the component's trajectory and resulting in impact dents. In contrast, this invention fills the curved steel component with abrasive particles, allowing them to cover the internal area to a large extent. The abrasive particles move by moving the curved steel component itself, resulting in less impact force. Guided by the inner wall of the component, the particles move along the trajectory of the curved steel component. Because the abrasive particles are filled, they do not need to move along the entire trajectory; they only need to move back and forth to simulate friction. This allows the abrasive particles covering the inside of the curved steel component to complete the grinding operation, ensuring the component's movement trajectory closely follows its own curved trajectory. This reduces the tangential force during particle movement, thereby reducing the force exerted by the particles on the inner wall of the curved steel component and preventing scratches and other quality problems.

[0039] Example 2

[0040] Because the abrasive grains did not completely fill the curved steel component, they were unable to cover the inner top wall area of ​​the curved steel component, resulting in missed areas during a single grinding operation. Therefore, based on Example 1, as follows... Figures 1 to 4 As shown, the abrasive grinding mechanism also includes a load base 7, on which two bearing seats 8 are fixed at intervals. A rotating shaft 9 is provided between the two bearing seats 8. The rotating shaft 9 is rotatably connected to the bearing seats 8. A rotating motor 10 is installed on one of the bearing seats 8. The output shaft of the rotating motor 10 is connected to the rotating shaft 9. The grinding base 4 is fixedly mounted on the rotating shaft 9. When the arc-shaped steel component is ground once, the rotating motor 10 is started. The rotating motor 10 drives the rotating shaft 9 to rotate 180°. The rotating shaft 9 drives the grinding base 4 to rotate 180°, thereby driving the arc-shaped steel component to rotate 180°. This causes the inner top wall of the arc-shaped steel component to be covered by abrasive grains facing downwards, and the abrasive grinding action is performed again to achieve full coverage grinding of the arc-shaped steel component and avoid the problem of missed grinding.

[0041] Example 3

[0042] Based on Example 2, such as Figures 1 to 6As shown, a main shaft 11 is coaxially fixed to the bottom of the drive disk 5. The main shaft 11 is rotatably mounted on the grinding base 4 via bearings. The bottom of the grinding base 4 is provided with an intermittent reciprocating drive mechanism, which includes a motor mounting plate 12 and a drive motor 13. The motor mounting plate 12 is fixedly connected to the grinding base 4, and the drive motor 13 is mounted on the motor mounting plate 12. The output shaft of the drive motor 13 is connected to an intermittent bevel gear 14. A first bevel gear 15 and a second bevel gear 16 are fitted onto the main shaft 11. A first bevel gear 15 and a second bevel gear 16 alternately mesh with an intermittent bevel gear 14. The drive motor 13 drives the intermittent bevel gear 14 to rotate. The intermittent bevel gear 14 is divided into a toothed area and a toothless area along its circumference. When the toothed area of ​​the intermittent bevel gear 14 meshes with the first bevel gear 15, the second bevel gear 16 is disengaged from the toothed area of ​​the intermittent bevel gear 14. This allows the intermittent bevel gear 14 to drive the main shaft 11 to rotate via the first bevel gear 15. The main shaft 11 then drives the drive disc 5 to rotate. When the toothed area of ​​the intermittent bevel gear 14 meshes with the first bevel gear 15... When the first bevel gear 15 disengages, the toothed area of ​​the intermittent bevel gear 14 does not immediately engage with the second bevel gear 16. Instead, after a certain interval, the toothed area of ​​the intermittent bevel gear 14 rotates to engage with the second bevel gear 16. The engagement of the second bevel gear 16 with the intermittent bevel gear 14 drives the main shaft 11 to rotate. Since the first bevel gear 15 and the second bevel gear 16 are arranged opposite to each other, the second bevel gear 16 drives the main shaft 11 to rotate in the opposite direction. When the toothed area of ​​the intermittent bevel gear 14 disengages from the second bevel gear 16, the toothed area of ​​the intermittent bevel gear 14 also needs to rotate for a certain period of time before engaging with the first bevel gear 15. This allows the arc-shaped steel component to reciprocate while remaining stationary for a period of time during each reversal. This eliminates the inertia of the abrasive grains, allowing them to move in a stationary state each time. This avoids the abrasive grains from failing to keep up with the direction of the arc-shaped steel component during rapid reversals, which could cause them to detach from the pipe wall and impact it. The intermittent reciprocating deflection further prevents the arc-shaped steel component from developing local impact pits.

[0043] Example 4

[0044] When the toothed area of ​​the intermittent bevel gear 14 disengages from the first bevel gear 15 or the second bevel gear 16, there is a period of engagement idle time. During this time, the toothed area of ​​the intermittent bevel gear 14 neither engages with the first bevel gear 15 nor the second bevel gear 16, causing the spindle 11 to be in a non-locking state. This makes the spindle 11 prone to misalignment due to external factors, resulting in the problem that the toothed area of ​​the intermittent bevel gear 14 cannot smoothly engage with the first bevel gear 15 or the second bevel gear 16. Therefore, based on Embodiment 3, as follows... Figures 1 to 14As shown, the grinding base 4 has a spindle cavity 54 inside, through which the spindle 11 passes. A shaft locking plate 55 is slidably disposed within the spindle cavity 54. A shaft locking screw 56 is threadedly connected to the side wall of the grinding base 4. The tail of the shaft locking screw 56 is rotatably connected to the shaft locking plate 55. The spindle 11 is located on the moving path of the shaft locking plate 55. An elastic pad 57, made of rubber, is fixed to the end face of the shaft locking plate 55 near the spindle 11. Multiple washers are fitted onto the shaft locking screw 56. Tightening... The shaft locking screw 56 drives the shaft locking plate 55 to press against the main shaft 11, causing the elastic pad 57 to be compressed against the main shaft 11. This creates a large frictional force between the elastic pad 57 and the main shaft 11, ensuring that when neither the first bevel gear 15 nor the second bevel gear 16 is engaged with the intermittent bevel gear 14, the strong frictional force generated by the elastic pad 57 can lock the position of the main shaft 11, preventing it from shifting and allowing the intermittent bevel gear 14 to smoothly and alternately engage with the first bevel gear 15 and the second bevel gear 16. By adjusting the number of shims, the position of the shaft locking screw 56 after tightening can be adjusted, as can the pressure of the elastic pad 57 on the main shaft 11, thereby adjusting the self-locking force on the main shaft 11.

[0045] Example 5

[0046] Because end caps are needed to seal both ends of the curved steel component, abrasive grinding blind spots are created at both ends of the curved steel component. Therefore, based on Example 4, as follows... Figures 1 to 13As shown, a port grinding mechanism is provided on the load base 7. The port grinding mechanism includes a port grinding base 39, a feed seat 40, a grinding turntable 41, and grinding components. The port grinding base 39 is mounted on the load base 7, the feed seat 40 is slidably mounted on the port grinding base 39, and the grinding turntable 41 is rotatably mounted on the feed seat 40. Multiple grinding components are arranged along the circumference of one end of the grinding turntable 41. The grinding components include a thin rod 42, a grinding crossbar 43, and a grinding wire 44. One end of the thin rod 42 is fixedly connected to the grinding crossbar 43. The thin rod 42 is perpendicular to the grinding crossbar 43, and the thin rod 42 is perpendicular to the grinding crossbar 43. Parallel to the axis of the grinding turntable 41, several grinding steel wires 44 are fixedly connected to the grinding crossbar 43. A second cylinder 50 is installed on the port grinding base 39. The telescopic shaft of the second cylinder 50 is connected to the feed seat 40. A grinding motor 51 is installed on the feed seat 40. The output shaft of the grinding motor 51 is connected to the drive gear 52. A driven gear 53 is fitted on the grinding turntable 41. The driven gear 53 meshes with the drive gear 52. Before abrasive grinding of the arc-shaped steel component, the two ports of the arc-shaped steel component are first ground by the port grinding mechanism, and then abrasive grains are filled to grind the inner wall of the middle. For lighter curved steel components, the end grinding operation can be performed manually by hand. For heavier curved steel components, a robotic arm can be used to hold the component for end grinding. The specific process for end grinding of curved steel components is as follows: the grinding motor 51 is started, and the grinding turntable 41 is rotated through the meshing of the drive gear 52 and the driven gear 53. The grinding turntable 41 drives the grinding crossbar 43 to rotate through the thin rod 42. The grinding crossbar 43 drives the grinding steel wire 4 on it to rotate. 4. Rotate the rotary table 41 so that the end of the arc-shaped steel component faces the grinding assembly. The second cylinder 50 drives the feed seat 40 to move closer to the arc-shaped steel component, moving the grinding assembly inside the arc-shaped steel component. Grinding is performed by the grinding wire 44 contacting the interior of the arc-shaped steel component. Because the grinding wire 44 can deform under compression, it will not make rigid contact with the arc-shaped steel component, thus avoiding interference that could damage the grinding assembly and / or the arc-shaped steel component. This method is suitable for grinding the irregular inner wall of the arc-shaped steel component. Preferably, four sets of grinding assemblies are provided, and the four sets of grinding assemblies are evenly distributed around the circumference of the grinding turntable 41.

[0047] Example 6

[0048] Based on Example 5, such as Figures 1 to 13As shown, the grinding turntable 41 has a radial groove 45 at the location where the grinding components are set. A radial slider 46 is slidably disposed within the radial groove 45. The end of the thin rod 42 away from the grinding crossbar 43 is fixedly connected to the radial slider 46. A guide rod 47 is fixed on the radial slider 46 and slides through the grinding turntable 41. A spring 48 is sleeved on the guide rod 47. One end of the spring 48 is connected to the radial slider 46, and the other end is connected to the side wall of the radial groove 45. The radial slider 46 can move within the radial groove 45, which can adjust the position of the grinding crossbar 43. Initially, the size of the area enclosed by the four sets of grinding components is adjusted. The inner diameter of the arc-shaped steel component is smaller than that of the inner hole, allowing the grinding wires 44 of the four grinding components to easily enter the arc-shaped steel component. Then, the grinding motor 51 starts to perform end grinding. During the grinding process, the high-speed rotation of the grinding turntable 41 generates centrifugal force in the grinding components. Under the action of centrifugal force, the radial slider 46 moves away from the center of the grinding turntable 41, allowing the four grinding components to unfold. This allows the grinding wires 44 to move closer to the inner wall of the arc-shaped steel component, and the bending deformation of the grinding wires 44 adapts to the irregular inner wall of the arc-shaped steel component, achieving comprehensive grinding of the irregular inner wall of the arc-shaped steel component. In specific implementation, a rubber sealing layer is wrapped around the arc-shaped cone 2. The interference fit between the rubber sealing layer and the arc-shaped steel component improves the sealing strength and prevents the abrasive grains from detaching from the arc-shaped steel component. Grinding the end of the arc-shaped steel component first can prevent burrs from scratching the rubber sealing layer.

[0049] Example 7

[0050] Based on Example 6, such as Figures 1 to 13As shown, the port grinding mechanism also includes a conical cylinder 59. The inner hole of the conical cylinder 59 is conical. The conical cylinder 59 is coaxial with the grinding turntable 41. A thin rod 42 passes through the inner hole of the conical cylinder 59. An arc-shaped protrusion 60 is fixed on the thin rod 42, and the arc-shaped protrusion contacts the inner wall of the conical cylinder 59. A first cylinder 49 is installed on the feed seat 40. The telescopic shaft of the first cylinder 49 is connected to the conical cylinder 59. The first cylinder 49 drives the conical cylinder 59 to move axially along the grinding turntable 41. By setting the conical cylinder 59, the position of the grinding components can be adjusted. Specifically, initially, the first cylinder 49 drives the conical cylinder 59 to move closer to the feed seat 40, so that the small diameter end of the conical cylinder 59 moves closer to the arc-shaped protrusion 60. Under the action of the conical inner wall of the conical cylinder 59, the thin rod 42 is squeezed, which drives the radial slider 46 to move closer to the center of the grinding turntable 41, thereby causing the four sets of grinding components to retract, facilitating the grinding process. The grinding crossbar 43 carries the grinding wire 44 into the interior of the arc-shaped steel component. During the grinding process, the first cylinder 49 drives the conical cylinder 59 away from the feed seat 40, causing the large-diameter end of the conical cylinder 59 to move closer to the arc-shaped protrusion 60. Under the action of the spring 48 and centrifugal force, the radial slider 46 drives the thin rod 42 away from the center of the grinding turntable 41, thereby unfolding the four grinding components. This allows the grinding wire 44 to smoothly contact the inner wall of the arc-shaped steel component to complete the end grinding operation. When the arc-shaped protrusion 60 contacts the inner wall of the conical cylinder 59, the radial slider 46 stops moving to avoid the radial slider 46 continuously moving away from the center of the grinding turntable 41, which could cause interference between the grinding crossbar 43 and the inner wall of the arc-shaped steel component. The conical cylinder 59 facilitates the control of the unfolding and retraction of the four grinding components and also controls the degree of unfolding of the four grinding components.

[0051] Example 8

[0052] Based on Example 7, such as Figures 1 to 13As shown, the radius grinding rod 6 includes a main body rod 17 and an adjusting rod 18. One end of the main body rod 17 is fixedly connected to the drive disk 5, and the other end has a mounting hole 19. One end of the adjusting rod 18 is slidably fitted into the mounting hole 19, and the other end is connected to the tooling assembly. Locking cavities 20 are provided on both sides of the mounting hole 19 within the main body rod 17. A locking window 21 communicating with the locking cavity 20 is provided on the side wall of the mounting hole 19. A power cavity 22 is provided above the mounting hole 19 within the main body rod 17. The locking cavity 20 communicates with the power cavity 22. A [missing information - likely a design feature] is provided within the locking cavity 20. There are a transverse locking block 23 and a longitudinal locking block 24. One end of the transverse locking block 23 is slidably adapted to the locking window 21, and the other end is provided with an inclined surface 25. A pressure plate 26 is slidably provided in the power chamber 22. The two ends of the longitudinal locking block 24 respectively contact the inclined surface 25 and the pressure plate 26. The moving direction of the pressure plate 26 coincides with the moving direction of the adjusting rod 18. A locking cam 27 is provided at the end of the pressure plate 26 away from the longitudinal locking block 24. A locking screw 28 is fixedly passed through the locking cam 27. The locking screw 28 is threadedly connected to the main body rod 17. The screw head of 28 is located outside the main body rod 17. Loosening the locking screw 28 causes the distal end of the locking cam 27 to deflect away from the pressure plate 26, releasing the pressure of the transverse locking block 23 on the adjusting rod 18. This allows the adjusting rod 18 to slide within the mounting hole 19 of the main body rod 17, thereby adjusting the length of the radius grinding rod 6. The length of the radius grinding rod 6 can be adjusted according to the radius of the arc-shaped steel component. After adjustment, tighten the locking screw 28. The locking screw 28 drives the locking cam 27 to rotate, causing the locking cam 27 to rotate and press the pressure plate 26. The pressure plate 26 simultaneously presses the longitudinal locking block 24, and the longitudinal locking block 24 presses the inclined surface 25 of the transverse locking block 23. Under the action of the inclined surface 25, the transverse locking block 23 moves closer to the adjusting rod 18, so that the transverse locking block 23 abuts against the adjusting rod 18, thereby locking the adjusting rod 18. This ensures that the length of the radius grinding rod 6 will not change during the reciprocating deflection grinding operation, and only one locking action is needed to drive the two transverse locking blocks 23 to press the adjusting rod 18. It has a strong locking ability and can adapt to the reciprocating deflection environment.

[0053] Example 9

[0054] Based on Example 8, such as Figures 1 to 11As shown, the tooling assembly includes an L-shaped base plate 29, a tooling pressure plate 30, and a tooling screw 33. A radius grinding rod 6 is connected to the L-shaped base plate 29 in the tooling assembly. A T-shaped groove 31 is vertically opened on the inner wall of the L-shaped base plate 29. A T-shaped slider 32 is fixed on the tooling pressure plate 30. The T-shaped slider 32 slides and adapts to the T-shaped groove 31. The tooling pressure plate 30 and the L-shaped base plate 29 form a U-shape. Both the tooling pressure plate 30 and the L-shaped base plate 29 have through holes. The tail of the tooling screw 33 passes through the through hole and is threaded with a locking nut 34. The arc-shaped steel component is placed between the L-shaped base plate 29 and the tooling pressure plate 30. Then, the tooling screw 33 and the locking nut 34 are installed so that the tooling pressure plate 30 presses the arc-shaped steel component, thus completing the tooling of the arc-shaped steel component. The operation is simple and the tooling effect is good.

[0055] Example 10

[0056] Based on Example 9, such as Figures 1 to 5 As shown, the sidewall of the sealing plate 1 is provided with multiple friction locking pairs along its circumference. The friction locking pairs include friction side plates 35, friction pressure plates 36, and screws 37. The friction side plates 35 are fixedly connected to the sealing plate 1. The screws 37 are threaded through the friction side plates 35, and the tail of the screws 37 is connected to the friction pressure plates 36. The friction pressure plates 36 are located between the friction side plates 35 of the arc-shaped cone 2. A rubber pad 38 is fixed to one end of the friction pressure plates 36 near the arc-shaped cone 2. After the arc-shaped cone 2 is inserted into the port of the arc-shaped steel component, the screws 37 are tightened, causing the screws 37 to drive the friction pressure plates 36 to move closer to the arc-shaped steel component. This causes the rubber pads 38 on the friction pressure plates 36 to press against the arc-shaped steel component, thereby firmly installing the sealing head on the arc-shaped steel component and ensuring that it will not fall off during the grinding process.

Claims

1. A curtain wall steel structure polishing device, characterized in that, The device includes an internal grinding mechanism for abrasive grains and a head assembly. The head assembly includes a sealing plate and an arc-shaped conical cylinder. The sealing plate is fixedly connected to the large-diameter end of the arc-shaped conical cylinder. Arc-shaped conical cylinders are inserted into both ends of the arc-shaped steel component to seal both ends of the arc-shaped steel component. The interior of the arc-shaped steel component is filled with abrasive grains. The abrasive grinding mechanism includes a grinding base, a drive disk, a radius grinding rod, and a tooling assembly. The drive disk is rotatably mounted on the grinding base, and the rotation axis of the drive disk is vertically set. The radius grinding rod is a telescopic structure, and its two ends are respectively connected to the drive disk and the tooling assembly. The tooling assembly is used to clamp the arc-shaped steel component. The drive disk drives the arc-shaped steel component to perform reciprocating deflection motion to form an arc-shaped grinding trajectory. The abrasive grinding mechanism also includes a load base, on which two bearing seats are fixed at intervals. A rotating shaft is provided between the two bearing seats. The rotating shaft is rotatably connected to the bearing seats. A rotating motor is installed on one of the bearing seats. The output shaft of the rotating motor is connected to the rotating shaft. The grinding base is fixedly mounted on the rotating shaft. A port grinding mechanism is provided on the load base. The port grinding mechanism includes a port grinding base, a feed seat, a grinding turntable, and grinding components. The port grinding base is installed on the load base. The feed seat is slidably installed on the port grinding base. The grinding turntable is rotatably installed on the feed seat. Multiple grinding components are arranged along the circumference of one end of the grinding turntable. Each grinding component includes a thin rod, a grinding crossbar, and grinding wires. One end of the thin rod is fixedly connected to the grinding crossbar. The thin rod is perpendicular to the grinding crossbar and parallel to the axis of the grinding turntable. Several grinding wires are fixedly connected to the grinding crossbar. The grinding turntable has a radial groove at the location where the grinding component is set. A radial slider is slidably disposed in the radial groove. The end of the thin rod away from the grinding crossbar is fixedly connected to the radial slider. A guide rod is fixed on the radial slider. The guide rod slidably passes through the grinding turntable. A spring is sleeved on the guide rod. One end of the spring is connected to the radial slider, and the other end is connected to the side wall of the radial groove. The port grinding mechanism also includes a conical cylinder. The inner hole of the conical cylinder is conical. The conical cylinder is coaxial with the grinding turntable. The thin rod passes through the inner hole of the conical cylinder. An arc-shaped protrusion is fixed on the thin rod. The arc-shaped protrusion contacts the inner wall of the conical cylinder. A first cylinder is installed on the feed seat. The telescopic shaft of the first cylinder is connected to the conical cylinder. The first cylinder drives the conical cylinder to move along the axial direction of the grinding turntable. The position of the grinding component can be adjusted by setting the conical cylinder. The bottom of the drive disk is coaxially fixed with a main shaft, which is rotatably mounted on the grinding base via bearings. The bottom of the grinding base is provided with an intermittent reciprocating drive mechanism, which includes a motor mounting plate and a drive motor. The motor mounting plate is fixedly connected to the grinding base, and the drive motor is mounted on the motor mounting plate. The output shaft of the drive motor is connected to an intermittent bevel gear. A first bevel gear and a second bevel gear are fitted opposite each other on the main shaft, and the first bevel gear and the second bevel gear alternately mesh with the intermittent bevel gear. When the toothed area of ​​the intermittent bevel gear disengages from the second bevel gear, the toothed area of ​​the intermittent bevel gear also needs to rotate for a period of time before meshing with the first bevel gear. This allows the arc-shaped steel component to reciprocate while simultaneously keeping it stationary for a period of time during each reversal. This eliminates the inertia of the abrasive grains, ensuring that they move in a stationary state each time. It prevents the abrasive grains from failing to keep up with the direction of the arc-shaped steel component during rapid reversals, which could cause them to detach from the pipe wall and impact it. The intermittent reciprocating deflection further avoids the problem of local impact dents on the arc-shaped steel component.

2. The polishing device of a curtain wall steel structure according to claim 1, characterized in that, The radius grinding rod includes a main rod and an adjusting rod. One end of the main rod is fixedly connected to a drive disk, and the other end has a mounting hole. One end of the adjusting rod is slidably fitted into the mounting hole, and the other end is connected to a tooling assembly.

3. The polishing device of a curtain wall steel structure according to claim 2, characterized in that, The main body rod has locking cavities on both sides of the mounting hole. The side wall of the mounting hole has a locking window that communicates with the locking cavities. The main body rod has a power cavity above the mounting hole. The locking cavity communicates with the power cavity. The locking cavity has a transverse locking block and a longitudinal locking block. One end of the transverse locking block slides to fit the locking window, and the other end has an inclined surface. A pressure plate slides in the power cavity. The two ends of the longitudinal locking block contact the inclined surface and the pressure plate, respectively. The moving direction of the pressure plate coincides with the moving direction of the adjusting rod. The end of the pressure plate away from the longitudinal locking block contacts a locking cam. A locking screw is fixedly threaded through the locking cam. The locking screw is threaded to the main body rod, and the screw head of the locking screw is located outside the main body rod.

4. The curtain wall steel structure polishing device according to claim 1, characterized in that, The tooling assembly includes an L-shaped base plate, a tooling pressure plate, and a tooling screw. The radius grinding rod is connected to the L-shaped base plate in the tooling assembly. The inner wall of the L-shaped base plate has a vertically formed T-shaped groove. A T-shaped slider is fixed on the tooling pressure plate. The T-shaped slider slides and adapts to the T-shaped groove. The tooling pressure plate and the L-shaped base plate form a U-shape. Both the tooling pressure plate and the L-shaped base plate have through holes. The tail of the tooling screw passes through the through hole and is threaded with a locking nut.

5. The curtain wall steel structure polishing device according to claim 1, characterized in that, The sidewall of the sealing plate is provided with multiple friction locking pairs along its circumference. Each friction locking pair includes a friction side plate, a friction pressure plate, and a screw. The friction side plate is fixedly connected to the sealing plate. The screw thread passes through the friction side plate, and the tail of the screw is connected to the friction pressure plate. The friction pressure plate is located between the friction side plates of the arc-shaped cone. A rubber pad is fixed to one end of the friction pressure plate near the arc-shaped cone.

6. The grinding device for a curtain wall steel structure according to claim 1, characterized in that, A second cylinder is installed on the port grinding base. The telescopic shaft of the second cylinder is connected to the feed seat. A grinding motor is installed on the feed seat. The output shaft of the grinding motor is connected to a drive gear. A driven gear is fitted on the grinding turntable. The driven gear meshes with the drive gear.

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