Flange outer ring machining equipment and machining method

Abstract

The invention relates to the technical field of flange machining, in particular to flange outer ring machining equipment and a machining method. According to the technical scheme, the device comprises a plurality of supporting arms which are fixed to a workbench and distributed at equal intervals, each supporting arm is composed of a hydraulic arm and a transverse arm installed on the hydraulic arm, a positioning disc installed on the workbench is arranged between every two adjacent supporting arms, and two movable moving seats are symmetrically arranged in a frame body of each transverse arm; wherein one moving seat is provided with an inner supporting pipe which is located on the inner ring of the flange during operation, the other moving seat is provided with an outer supporting pipe which is located on the outer ring of the flange during operation, and the outer supporting pipe and the inner supporting pipe are provided with a rotatable outer supporting barrel and a rotatable inner supporting barrel respectively. By moving the outer supporting barrel and the inner supporting barrel in all directions, the outer supporting barrel and the inner supporting barrel make contact with the outer ring and the inner ring of the flange correspondingly, internal and external clamping of the flange is formed, the mode different from a single inner ring clamping and electromagnetic fixing mode is achieved, and the problem of uneven stress can be avoided to the maximum extent.

Description

Technical Field

[0001] The present invention relates to the technical field of flange processing, and particularly relates to a flange outer ring processing device and a processing method. Background Art

[0002] A flange is a part for connecting shafts to each other, used for connecting between pipe ends; there are also flanges used at the inlets and outlets of equipment for connecting between two pieces of equipment.

[0003] The document with the publication number CN118905658A points out that in the existing flange outer ring processing device, it can only clamp and fix flanges of the same size, which results in limitations in clamping flanges by the device and cannot position flanges of various different sizes. It supports the magnetic control ring through a workbench, fixes and locks the magnetic control ring with fixing bolts, sleeves the shaft center sleeve on the upper ends of the main shaft and the magnetic control ring, and makes the magnetic control ring electromagnetically fix the shaft center sleeve by energizing the magnetic control ring. By replacing shaft center sleeves of different sizes, axial positioning of flanges of different sizes can be achieved to realize axial positioning of flanges of multiple sizes.

[0004] Based on the existing technology and the above document, there are still the following problems: 1. When traditional mechanical clamps are clamped, since they only fix from the inner ring of the flange, the forces on both sides of the workpiece are uneven, especially in thin-wall flanges, it is easy to cause wall thickness differences (such as depth deviations of dust-proof grooves on the outer ring of bearings); 2. In the above-mentioned published document, it is fixed by magnetic force, and the electromagnetic force depends on the magnetic field distribution. If the electromagnetic components of the magnetic control ring are designed or installed improperly, it will lead to differences in local magnetic field intensity, resulting in uneven forces on both sides of the workpiece, exacerbating the symmetrical processing deviation, and flanges of different materials (such as non-magnetic materials) have inconsistent responses to electromagnetic force, which may cause problems with clamping stability and further affect processing symmetry; 3. When the flange is ground, heat is generated by the friction between the grinding wheel and the workpiece. If the coolant flow is insufficient or the grinding parameters are improper, it is easy to cause excessive local temperature rise, resulting in dimensional over-tolerance or surface burn. In the above-mentioned published document, fixed by magnetic force, the electromagnetic system is prone to generate heat during high-frequency or long-term operation, which will further cause excessive heat of the workpiece and local temperature rise, leading to thermal expansion deformation and affecting processing accuracy. Summary of the Invention

[0005] The purpose of the present invention is to propose a flange outer ring processing device and a processing method for the problems existing in the background art.

[0006] The technical solution of the present invention: A flange outer ring processing device includes a plurality of support arms fixed on the workbench and evenly distributed. The support arms are composed of hydraulic arms and transverse arms installed on the hydraulic arms. A positioning disk installed on the workbench is provided between adjacent support arms; The transverse arm includes a transverse plate and a frame body mounted on the transverse plate. Two movable moving seats are symmetrically arranged inside the frame body. An inner support pipe located inside the inner circle of the flange during operation is installed on one moving seat, and an outer support pipe located outside the outer circle of the flange during operation is installed on the other moving seat. Rotatable outer and inner support barrels are respectively installed on the outer support pipe and the inner support pipe. During operation, the outer support barrel and the inner support barrel are respectively in contact with the outer and inner circles of the flange.

[0007] Preferably, a power device for driving the movement of the moving seat is fixedly installed between several support arms. The power device includes a housing fixed between adjacent transverse plates and also includes a first motor installed inside the housing.

[0008] Preferably, the power device further includes a driving rod rotatably installed inside the frame body. A driving shaft is fixed to the output end of the first motor. A connecting member is installed between the driving shaft and the driving rod. The driving rod is provided with a first thread and a second thread, and the thread directions of the first thread and the second thread are opposite. The two moving seats are respectively threadedly installed on the first thread and the second thread, and the moving seats are slidably connected to the frame body wall.

[0009] Preferably, the connecting member installed between the driving shaft and the driving rod includes a driving bevel gear and a driven bevel gear. The driving bevel gear is fixedly connected to the driving shaft, the driven bevel gear is fixedly connected to the driving rod, and the driving bevel gear and the driven bevel gear are meshed.

[0010] Preferably, the number of outer support pipes is multiple. The multiple outer support pipes are all fixed on an arc-shaped seat. The arc-shaped seat is fixedly connected to the moving seat threadedly installed on the second thread, and the multiple outer support pipes are distributed in an arc shape.

[0011] Preferably, a cooling water tank is installed above the transverse plate. The cooling water tank is respectively communicated with the outer support pipe and the inner support pipe through hoses. The outer support pipe and the inner support pipe are respectively communicated with the outer support barrel and the inner support barrel. The outer support barrel and the inner support barrel are both provided with water spraying holes.

[0012] Preferably, the ends of the outer support pipe and the inner support pipe are provided with chutes distributed up and down. Both ends of the outer support barrel and the inner support barrel are slidably installed in the chutes. The ends of the outer support pipe and the inner support pipe are both provided with water outlets, and the water spraying holes are communicated with the inner cavities of the outer support barrel and the inner support barrel.

[0013] Preferably, several robotic arms are installed on the workbench. The robotic arms are provided with grinding wheels. The grinding wheels are located between adjacent support arms. A driving disk is fixed to the bottom of the positioning disk. A second motor for driving the driving disk to rotate is installed at the bottom of the workbench. Several equally spaced positioning columns are fixed on the positioning disk.

[0014] A method for machining the outer circle of a flange includes the following steps: S1: Place the flange on the positioning disk so that the positioning columns pass through the flange screw holes; S2: Activate the hydraulic arm to position the transverse arm above the flange, and then move the two moving seats closer to each other; S3: When the moving seat moves, it drives the outer support tube and the inner support tube to move, so that the inner support barrel and the outer support barrel clamp the flange from the inner and outer circles of the flange respectively; S4: Activate the robotic arm to bring the grinding wheel close to the outer circle of the flange, and then start the second motor to drive the drive disk to drive the positioning disk to rotate. The flange will start to rotate with the positioning disk, and the chamfer of the flange can be ground by the grinding wheel.

[0015] Compared with the existing technology, the beneficial effects of the present invention are as follows: by providing a number of equally spaced support arms, which are composed of a transverse arm and a hydraulic arm, the four sides of the flange can be clamped. Specifically, by moving the outer support barrels and inner support barrels in all directions, the two are brought into contact with the outer and inner circles of the flange respectively, forming an inner and outer clamping of the flange. Different from the single inner circle clamping and electromagnetic fixing methods, the problem of uneven stress can be avoided to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the transverse arm of the present invention; Figure 3 is a schematic cross-sectional structural diagram of the transverse arm of the present invention; Figure 4 is a schematic structural diagram of the water outlet of the present invention; Figure 5 is a schematic structural diagram of the grinding wheel of the present invention; Figure 6 is a schematic structural diagram of the present invention during operation.

[0017] Reference numerals: 1, transverse arm; 2, hydraulic arm; 3, power device; 4, robotic arm; 5, grinding wheel; 6, positioning column; 7, drive disk; 8, second motor; 11, cross plate; 12, frame; 13, cooling water tank; 14, moving seat; 15, outer support tube; 16, inner support tube; 17, outer support barrel; 18, inner support barrel; 19, arc seat; 31, first motor; 32, drive shaft; 33, drive rod; 34, first thread; 35, second thread; 36, driving bevel gear; 37, driven bevel gear; 100, workbench; 200, positioning disk; 300, water spray hole; 400, water outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0019] Example 1 Refer to the appendix Figure 1 , a flange outer ring processing device, including several support arms fixed on the workbench 100 and equally spaced, the support arms are composed of a hydraulic arm 2 and a transverse arm 1 installed on the hydraulic arm 2, and a positioning disk 200 installed on the workbench 100 is provided between several adjacent support arms; The transverse arm 1 includes a transverse plate 11 and a frame 12 installed on the transverse plate 11. Two movable moving seats 14 are symmetrically arranged in the frame 12. An inner support tube 16 located inside the flange during operation is installed on one of the moving seats 14, and an outer support tube 15 located outside the flange during operation is installed on the other moving seat 14. Rotatable outer support barrels 17 and inner support barrels 18 are respectively installed on the outer support tube 15 and the inner support tube 16. During operation, the outer support barrel 17 and the inner support barrel 18 are respectively in contact with the outer ring and the inner ring of the flange.

[0020] In the prior art, it is fixed and clamped from the inner ring of the flange, which causes uneven stress on both sides of the workpiece and is prone to wall thickness difference. When fixed by magnetism, it is affected by the field strength difference and the flange material, which may cause problems with clamping stability and further affect the processing symmetry; During the operation of this solution, the outer support barrel 17 and the inner support barrel 18 are respectively in contact with the outer ring and the inner ring of the flange, forming internal and external clamping of the flange. Different from the single inner ring clamping and electromagnetic fixing methods, it can avoid the problem of uneven stress to the greatest extent.

[0021] Specifically, a power device 3 for driving the moving seat 14 to move is fixedly installed between several support arms. The power device 3 includes a housing fixed between adjacent transverse plates 11, and also includes a first motor 31 installed in the housing.

[0022] Reference Figure 2 and 3 , the power device 3 further includes a driving rod 33 rotatably installed in the frame 12. A driving shaft 32 is fixed to the output end of the first motor 31. A connecting piece is installed between the driving shaft 32 and the driving rod 33. The driving rod 33 is provided with a first thread 34 and a second thread 35. The thread rotation directions of the first thread 34 and the second thread 35 are opposite. The two moving seats 14 are respectively threadedly installed on the first thread 34 and the second thread 35, and the moving seat 14 is slidably connected to the frame 12 wall; The connecting piece installed between the driving shaft 32 and the driving rod 33 includes a driving bevel gear 36 and a driven bevel gear 37. The driving bevel gear 36 is fixedly connected to the driving shaft 32, the driven bevel gear 37 is fixedly connected to the driving rod 33, and the driving bevel gear 36 and the driven bevel gear 37 are meshed; It should be noted that in this embodiment, if the number of several equally spaced support arms is four, then the number of both the transverse arms 1 and the hydraulic arms 2 is four. A drive rod 33 is rotatably installed in the housing 12 of each hydraulic arm 2, and the driven bevel gears 37 fixed to each drive rod 33 are all engaged with the same driving bevel gear 36. Therefore, the size of the driving bevel gear 36 is relatively large. During specific operation, starting the drive shaft 32 will drive the driving bevel gear 36 to rotate. Thus, the driving bevel gear 36 will engage several drive rods 33 to rotate simultaneously, so that the two moving seats 14 located on the first thread 34 and the second thread 35 will move in opposite directions to drive the outer support barrel 17 and the inner support barrel 18 to approach and move away from each other.

[0023] In addition, in this embodiment, the number of outer support pipes 15 is multiple. Multiple outer support pipes 15 are all fixed on the arc-shaped seat 19. The arc-shaped seat 19 is fixedly connected to the moving seat 14 threadedly installed on the second thread 35. Multiple outer support pipes 15 are distributed in an arc shape. Specifically, if there are three outer support pipes 15 installed on the arc-shaped seat 19, then there are three outer support barrels 17 on the outer circumference of the flange. This is because the circumference of the outer circle of the flange is greater than that of the inner circle. If there is only a single outer support barrel 17, the clamping range will be relatively small, resulting in a problem of reduced stability. It should also be noted that in this embodiment, the number of support arms is four, and the flange can be clamped from four directions, and a circular shape is formed among multiple ones in the four directions.

[0024] Embodiment Two Reference Figure 3 And Figure 4 , based on Embodiment One, a cooling water tank 13 is installed above the cross plate 11. The cooling water tank 13 is respectively connected to the outer support pipe 15 and the inner support pipe 16 through hoses. The outer support pipe 15 and the inner support pipe 16 are respectively connected to the outer support barrel 17 and the inner support barrel 18. The outer support barrel 17 and the inner support barrel 18 are both provided with water spraying holes 300. In this embodiment, the ends of the outer support pipe 15 and the inner support pipe 16 are provided with upper and lower parts of sliding grooves. Both ends of the outer support barrel 17 and the inner support barrel 18 are slidably installed in the sliding grooves. The ends of the outer support pipe 15 and the inner support pipe 16 are both provided with water outlet holes 400, and the water spraying holes 300 are communicated with the inner cavities of the outer support barrel 17 and the inner support barrel 18.

[0025] Embodiment Three Reference Figure 5 , based on the above Embodiment One or Two, several robotic arms 4 are installed on the workbench 100. The robotic arms 4 are provided with grinding wheels 5. The grinding wheels 5 are located between adjacent support arms. A driving disk 7 is fixed to the bottom of the positioning disk 200. A second motor 8 for driving the driving disk 7 to rotate is installed at the bottom of the workbench 100. Several equally spaced positioning columns 6 are fixed on the positioning disk 200.

[0026] Reference Figure 6 , this figure is a schematic diagram during operation. Figure 6 In Figure 6 , A is a flange. During specific operation, in combination with the above embodiments, the flange is placed on the positioning disk 200. The positioning posts 6 on the positioning disk 200 will successively enter the bolt holes of the flange, playing an auxiliary fixing role. Subsequently, the hydraulic arm 2 is started to adjust the height of the transverse arm 1, and then the first motor 31 is started to drive the drive shaft 32 to rotate. The rotation of the drive shaft 32 causes the driving bevel gear 36 to mesh with the driven bevel gear 37 to rotate, thereby driving the drive rod 33 to rotate. When the drive rod 33 rotates, the two moving seats 14 will move on the first thread 34 and the second thread 35 respectively. Since the thread directions of the first thread 34 and the second thread 35 are opposite, the two moving seats 14 can approach each other. At this time, multiple outer support barrels 17 move towards the outer ring of the flange, and the inner support barrel 18 moves towards the inner ring of the flange. When moving, the outer support barrel 17 and the inner support barrel 18 can clamp and stabilize the flange. Subsequently, the robotic arm 4 is started to make the grinding wheel 5 approach the outer ring of the flange, and then the second motor 8 is started to drive the drive disk 7 to drive the positioning disk 200 to rotate. At this time, the flange will start to rotate along with the positioning disk 200, and the grinding wheel 5 can perform grinding operations on the rotating flange. And at this time, since both the outer support barrel 17 and the inner support barrel 18 can rotate, the rotation of the flange will cause it to rotate to a certain extent. In this way, when the rotating outer support barrel 17 and the inner support barrel 18 can keep the flange stable, they can still ensure its rotation, which is convenient for chamfer grinding. During grinding, high temperature will be generated. By injecting water into the cooling water tank 13, the water will be input into the outer support pipe 15 and the inner support pipe 16 through the hose, and then discharged into the outer support barrel 17 and the inner support barrel 18 from the water outlet 400, and finally sprayed out to the outer ring of the flange through the spray holes 300, which can play a cooling effect.

[0027] In addition, the present invention also discloses a method for processing the outer ring of a flange, including the following steps: S1: Place the flange on the positioning disk 200 so that the positioning posts 6 pass through the screw holes of the flange; S2: Start the hydraulic arm 2 to make the transverse arm 1 located above the flange, and then make the two moving seats 14 approach each other; S3: When the moving seat 14 moves, it drives the outer support pipe 15 and the inner support pipe 16 to move, so that the inner support barrel 18 and the outer support barrel 17 clamp the flange from the inner and outer rings of the flange respectively; S4: Start the robotic arm 4 to make the grinding wheel 5 approach the outer ring of the flange, and then start the second motor 8 to drive the drive disk 7 to drive the positioning disk 200 to rotate. The flange will start to rotate along with the positioning disk 200, and the chamfer of the flange can be ground through the grinding wheel 5.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0030] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered by the protection scope of the present invention.

Claims

1. A flange outer ring processing equipment, characterized in that: It includes a plurality of support arms fixed on a workbench and distributed at equal distances, the support arms are composed of a hydraulic arm and a transverse arm installed on the hydraulic arm, and a positioning plate installed on the workbench is provided between adjacent support arms; The transverse arm includes a transverse plate and a frame installed on the transverse plate. Two movable seats are symmetrically arranged in the frame. One of the movable seats is installed with an inner supporting tube located on the inner circle of the flange during operation, and the other movable seat is installed with an outer supporting tube located on the outer circle of the flange during operation. A rotatable outer supporting barrel and inner supporting barrel are respectively installed on the outer supporting tube and the inner supporting tube. During operation, the outer supporting barrel and the inner supporting barrel are respectively in contact with the outer circle and the inner circle of the flange.

2. The flange outer ring processing equipment according to claim 1, characterized in that: A power device for driving the moving seat to move is fixedly installed between the supporting arms. The power device includes a shell fixed between adjacent transverse plates and a first motor installed in the shell.

3. The flange outer ring processing equipment according to claim 3 is characterized in that: The power device also includes a driving rod rotatably installed in the frame, a driving shaft is fixed to the output end of the first motor, a connecting piece is installed between the driving shaft and the driving rod, a first thread and a second thread are provided on the driving rod, the thread rotation directions of the first thread and the second thread are opposite, two moving seats are respectively threadedly installed on the first thread and the second thread, and the moving seats are slidably connected to the frame wall.

4. The flange outer ring processing equipment according to claim 3, characterized in that: The connecting piece installed between the driving shaft and the driving rod comprises a driving bevel gear and a driven bevel gear, the driving bevel gear is fixedly connected to the driving shaft, the driven bevel gear is fixedly connected to the driving rod, and the driving bevel gear and the driven bevel gear are meshed.

5. The flange outer ring processing equipment according to claim 3, characterized in that: There are multiple outer supporting tubes, all of which are fixed on the arc seat. The arc seat is fixedly connected to a movable seat threadedly mounted on the second thread, and the multiple outer supporting tubes are distributed in an arc shape.

6. The flange outer ring processing equipment according to claim 1, characterized in that: A cooling water tank is installed above the transverse plate. The cooling water tank is connected to the outer supporting pipe and the inner supporting pipe through hoses. The outer supporting pipe and the inner supporting pipe are connected to the outer supporting barrel and the inner supporting barrel respectively. Both the outer supporting barrel and the inner supporting barrel are provided with water spray holes.

7. The flange outer ring processing equipment according to claim 6, characterized in that: The ends of the outer supporting tube and the inner supporting tube are provided with slide grooves distributed up and down, and both ends of the outer supporting barrel and the inner supporting barrel are slidably installed in the slide grooves. The ends of the outer supporting tube and the inner supporting tube are provided with water outlets, and the water spray holes are connected to the inner cavities of the outer supporting barrel and the inner supporting barrel.

8. The flange outer ring processing equipment according to claim 1, characterized in that: Several robotic arms are installed on the workbench, and the robotic arms are provided with grinding wheels. The grinding wheels are located between adjacent support arms. A driving disk is fixed at the bottom of the positioning disk. A second motor for driving the driving disk to rotate is installed at the bottom of the workbench, and several equidistantly distributed positioning columns are fixed on the positioning disk.

9. A flange outer ring processing method, based on the flange outer ring processing equipment according to claim 8, characterized in that: The steps include: S1: Place the flange on the positioning plate so that the positioning column passes through the flange screw hole; S2: Start the hydraulic arm to make the transverse arm be above the flange, and then make the two moving seats approach each other; S3: When the moving seat moves, the outer support tube and the inner support tube are driven to move, so that the inner support barrel and the outer support barrel are clamped from the inner and outer circles of the flange respectively; S4: Start the robot arm so that the grinding wheel is close to the outer ring of the flange, and then start the second motor to drive the driving plate to drive the positioning plate to rotate. The flange will start to rotate with the positioning plate, and the flange can be chamfered by the grinding wheel.

Images