Positioning tool for flange plate machining

Abstract

The invention discloses a positioning tool for flange plate machining, and relates to the field of machining positioning, the positioning tool comprises a fixed base, a supporting base, an inner supporting assembly, a clamping assembly and a driving part, and the fixed base is fixedly arranged on the ground; the supporting base is fixedly arranged on the fixed base; the inner supporting assembly is slidably arranged on the supporting base. The clamping assembly is arranged on the fixed base in a sliding mode to clamp the outer circumferential side of the flange plate, and the clamping assembly drives the inner supporting assembly to open the inner circumferential side of the flange plate through the connecting piece while clamping the flange plate. The driving piece is fixedly arranged on one side of the fixed base and drives the inner supporting assembly and the clamping assembly to move. The flange positioning device has the effect of improving the flange positioning efficiency.

Description

Technical Field

[0001] The present application relates to the field of mechanical processing positioning, and in particular to a positioning tool for flange processing. Background Art

[0002] In the field of mechanical processing, precise component positioning is crucial for ensuring product quality and production efficiency. With the continuous development of industrial manufacturing, the requirements for machining precision of various components are increasing day by day. As a key component in mechanical connections, the machining quality of flanges directly affects the stability and reliability of the entire mechanical system. Efficient and precise flange positioning has become a critical issue that needs to be addressed in the machining industry, which is crucial for improving the performance and market competitiveness of mechanical products.

[0003] During flange machining, various methods are often employed to achieve positioning. A common method involves using a standard three-jaw chuck, which uses the synchronized movement of the three jaws to clamp the flange's outer circumference for initial positioning. Alternatively, simple dowel pins and bolts are used to secure the flange to the workbench, ensuring a relatively stable position during machining.

[0004] However, conventional three-jaw chucks can only clamp and position the outer circumference of the flange, making it difficult to position the inner circumference. This can cause the inner circumference of the flange to wobble or shift during machining, affecting machining accuracy. While using locating pins and bolts can ensure a certain degree of stability, the operation is cumbersome, and the installation and removal process is time-consuming, reducing machining efficiency. Summary of the Invention

[0005] In order to improve the efficiency of flange positioning, the present application provides a positioning tool for flange processing.

[0006] This application provides a positioning tool for flange processing, which adopts the following technical solution: A positioning tool for flange processing, comprising A fixed base, the fixed base being fixedly arranged on the ground; A supporting base, the supporting base is fixedly arranged on the fixing base, and a positioning hole is provided on the supporting base; An inner support assembly, the inner support assembly being slidably disposed on the support base; A clamping assembly is slidably disposed on the fixed base to clamp the outer circumference of the flange. While clamping the flange, the clamping assembly drives the inner support assembly through the connecting piece to open the inner circumference of the flange. A driving member is fixedly arranged on one side of the fixed base, and the driving member drives the inner support assembly and the clamping assembly to move.

[0007] By adopting the above technical solution, the fixed base can be firmly installed on the ground, the supporting base provides a support platform for the inner support assembly, the inner support assembly and the clamping assembly respectively position the inner and outer sides of the flange, and the clamping assembly can drive the inner support assembly to move when clamped. The driving part can move the inner support assembly and the clamping assembly to realize the positioning function, thereby effectively improving the positioning stability and accuracy during flange processing.

[0008] Optionally, the clamping assembly includes: A guide rail, the guide rail is fixedly provided on one side of the support base, and a first rotating shaft is fixedly provided on both sides of the guide rail; A slider, the slider is slidably arranged on the guide rail, the slider moves horizontally along the guide rail, and a second rotating shaft is fixedly arranged on both sides of the slider; An outer clamp, the outer clamp being fixedly mounted on the slider and in contact with the flange; two swing arms symmetrically arranged along the moving axis of the slider, the middle section of each swing arm being rotatably arranged with the first rotating shaft, the upper end of each swing arm being slidably connected with the second rotating shaft, and the lower end of each swing arm being slidably connected with the driving member; Wherein, a first sliding groove is provided at the upper end of each swing arm, the second rotating shaft is slidably provided in the first sliding groove, and two groups of the swing arms are symmetrically provided along the central axis of the fixed base.

[0009] By adopting the above technical solution, the guide rail facilitates the sliding of the slider, and the slider can drive the outer clamp to move horizontally. The middle section of the swing arm rotates around the first rotating shaft, the upper end slides on the outside of the second rotating shaft through the first sliding groove, and the lower end is slidably connected to the driving member, so that the swing arm can drive the slider to move with the movement of the driving member, and then the outer clamp can clamp the outer peripheral side of the flange. The symmetrical arrangement of the two sets of swing arms can make the force more uniform, effectively improving the clamping effect on the outer peripheral side of the flange.

[0010] Optionally, the support base is horizontally provided with a rotation groove, and the inner support assembly includes: A rotating plate, the rotating plate being rotatably disposed in the rotating groove, the rotating plate being provided with an arc-shaped guide groove, and a plurality of the arc-shaped guide grooves being spaced apart along the circumference of the rotating plate; A movable guide plate, the movable guide plate being rotatably arranged on one side of the rotating plate, the movable guide plate being horizontally provided with a horizontal guide groove, a plurality of the horizontal guide grooves being arranged at intervals along the horizontal direction of the movable guide plate, and each of the horizontal guide grooves being arranged in a one-to-one correspondence with the arc-shaped guide groove; An inner support plate, the bottom end of the inner support plate is slidably connected to the arc guide groove, the peripheral side of the inner support plate is slidably arranged in the horizontal guide groove, and an inner support plate is correspondingly arranged in each horizontal guide groove.

[0011] By adopting the above technical solution, the inner support assembly can utilize the rotation of the rotating plate in the rotating groove, cooperate with the arc guide groove and the horizontal guide groove, and drive the inner support plate to slide, thereby achieving stable support and positioning of the inner circumference of the flange, which is beneficial to improving the stability of the flange during processing.

[0012] Optionally, a second sliding groove is provided at the lower end of the swing arm, and the driving member includes: A hydraulic cylinder, wherein the fixed end of the hydraulic cylinder is fixedly arranged on one side of the fixed base, and the telescopic end of the hydraulic cylinder passes through the fixed base; A driving plate is fixedly arranged on the telescopic end of the hydraulic cylinder, and a third rotating shaft is fixedly arranged on both sides of the driving plate, and the free end of the third rotating shaft is slidably arranged in the second sliding groove.

[0013] By adopting the above technical solution, the hydraulic cylinder is used to drive the drive plate to move, and the drive plate drives the third rotating shaft to slide in the second slide groove at the lower end of the swing arm, thereby driving the swing arm to rotate, so that the slider moves horizontally on the guide rail, realizing the clamping action of the external clamp on the outer peripheral side of the flange. At the same time, the hydraulic cylinder can effectively transmit the driving force to ensure the stable operation of the positioning tooling.

[0014] Optionally, a connecting member is provided between the outer clamp and the rotating plate, and the connecting member is a pull rod, one end of the pull rod is fixedly provided on one end of the outer clamp and is rotatably connected, and the other end of the pull rod is rotatably connected to one end of the rotating plate.

[0015] By adopting the above technical solution, when the clamping assembly clamps the outer side of the flange, it can drive the inner support assembly through the pull rod to synchronously open the inner side of the flange, thereby achieving simultaneous positioning of the inner and outer sides and improving positioning stability.

[0016] Optionally, two groups of the clamping components are symmetrically arranged along the central axis of the support base.

[0017] By adopting the above technical solution, the two groups of clamping components symmetrically arranged along the central axis of the support base can clamp the outer peripheral side of the flange more stably and evenly, further improving the positioning effect of the flange.

[0018] Optionally, a V-shaped notch is provided at one end of the outer clamp close to the flange.

[0019] By adopting the above technical solution, a V-shaped groove is set at one end of the outer clamp close to the rotating plate, which can fit the outer periphery of flanges of different sizes or shapes more closely, enhance the clamping effect on the outer periphery of the flange, and improve the positioning stability of the positioning tool on the flange.

[0020] Optionally, the swing arm includes a driving part and a driven part, the driving part is slidingly connected to the driving plate through a second sliding groove, the driven part is slidingly connected to the slider through a first sliding groove, and the length of the driving part is greater than the length of the driven part.

[0021] By adopting the above technical solution, the swing arm forms a lever structure, and the longer lever arm characteristic of the driving part is utilized to enhance the transmission efficiency of the driving force, reduce the driving loss, and improve the stability of the tooling during operation.

[0022] In summary, the embodiment of the present invention provides a positioning tool for flange processing, which includes at least one of the following beneficial technical effects: The fixed base can be firmly installed on the ground, and the supporting base provides a supporting platform for the inner support assembly. The inner support assembly and the clamping assembly respectively position the inner and outer sides of the flange, and the clamping assembly can drive the inner support assembly to move when clamped. The driving part can move the inner support assembly and the clamping assembly to realize the positioning function, thereby effectively improving the positioning stability and accuracy during flange processing.

[0023] The swing arm forms a lever structure, and the longer lever arm characteristic of the driving part is utilized to enhance the transmission efficiency of the driving force, reduce the driving loss, and improve the stability of the tooling during operation.

[0024] The inner support assembly can utilize the rotation of the rotating plate in the rotating groove, cooperate with the arc guide groove and the horizontal guide groove to drive the inner support plate to slide, thereby achieving stable support and positioning of the inner circumference of the flange, which is beneficial to improving the stability of the flange during processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a positioning tool for flange processing provided by an embodiment of the present invention; Figure 2 A cross-sectional view of a positioning tool for flange processing provided by an embodiment of the present invention; Figure 3 An exploded view of an internal support assembly in a positioning tool for flange processing provided in an embodiment of the present invention.

[0026] Description of the symbols in the figure: 1. Fixed base; 12. Support base; 2. Clamping assembly; 21. Guide rail; 22. Slider; 23. External clamp; 24. Swing arm; 241. Driving part; 242. Driven part; 26. First slide groove; 27. First rotating shaft; 28. Second rotating shaft; 3. Inner support assembly; 31. Rotating plate; 32. Moving guide plate; 33. Inner support plate; 34. Rotating groove; 35. Arc guide groove; 36. Horizontal guide groove; 41. Hydraulic cylinder; 42. Driving plate; 43. Second slide groove; 44. Pull rod; 45. Third rotating shaft. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-3 This application is described in further detail.

[0028] Combine Figure 1 and Figure 2 The embodiment of the present application discloses a positioning tool for flange processing, including: a fixed base 1, a supporting base 12, an inner support assembly 3, a clamping assembly 2, and a driving member. The fixed base 1 is fixedly set on the ground; the supporting base 12 is fixedly set on the fixed base 1; the inner support assembly 3 is slidably set on the supporting base 12; the clamping assembly 2 is slidably set on the fixed base 1 to clamp the outer peripheral side of the flange, and the clamping assembly 2 drives the inner support assembly 3 to open the inner peripheral side of the flange through the connecting member while clamping the flange; the driving member is fixedly set on one side of the fixed base 1, and the driving member drives the inner support assembly 3 and the clamping assembly 2 to move.

[0029] In the embodiment of the present application, the fixed base 1 is made of cast iron, wherein the surface of the fixed base 1 is quenched to increase the hardness of the fixed base 1, thereby improving the supporting force of the fixed base 1. The fixed base 1 is composed of a fixed panel and a fixed bracket, wherein the fixed panel and the fixed bracket can be integrally formed or fixed by welding or bolting. The fixed bracket is hollowed out, which reduces the weight while facilitating the transportation of the internal support assembly 3 and the clamping assembly 2. The fixing method of the support base 12 and the fixed base 1 is not specifically limited in the embodiment of the present application. When the flange needs to be clamped, the flange is placed on the support base 12. It should be noted that the inner diameter of the flange is sleeved on the inner support component 3. The driving part is started to make the clamping component 2 move along the outer diameter of the flange to clamp the outer peripheral side of the flange. At the same time, when the clamping component 2 moves, it drives the inner support component 3 to move toward the inner diameter of the flange under the drive of the connecting part. Therefore, the inner diameter and outer diameter of the flange are positioned at the same time under the cooperation of the inner support component 3 and the clamping component 2. Compared with the traditional three-jaw chuck, the embodiment of this application is faster in positioning the flange and does not require secondary correction.

[0030] Combine Figure 1 and Figure 2In a specific embodiment, the clamping assembly 2 includes a guide rail 21, a slider 22, an outer clamp 23, and a swing arm 24. The guide rail 21 is fixedly arranged on one side of the support base 12, and a first rotating shaft 27 is fixedly arranged on both sides of the guide rail 21; the slider 22 is slidably arranged on the guide rail 21, and the slider 22 moves horizontally along the guide rail 21. A second rotating shaft 28 is fixedly arranged on both sides of the slider 22; the outer clamp 23 is fixedly arranged on the slider 22, and the outer clamp 23 is in contact with the flange; two swing arms 24 are symmetrically arranged along the moving axis of the slider 22, and the middle section of each swing arm 24 is rotatably arranged with the first rotating shaft 27. The upper end of each swing arm 24 is provided with a first sliding groove 26, and the second rotating shaft 28 is slidably arranged in the first sliding groove 26. The lower end of each swing arm 24 is slidably connected to the driving member; the outer clamp 23 is provided with a V-shaped notch at one end near the rotating plate 31. The clamping assembly 2 is symmetrically arranged in two groups along the central axis of the support base 12.

[0031] Each swing arm 24 has a first slide groove 26 at its upper end, which is slidably disposed outside the second rotating shaft 28. Two sets of swing arms 24 are symmetrically arranged along the central axis of the fixed base 1. The swing arm 24 includes a driving portion 241 and a driven portion 242. The driving portion 241 is slidably connected to the driving plate 42 via the second slide groove 43, and the driven portion 242 is slidably connected to the slider 22 via the first slide groove 26. The driving portion 241 is longer than the driven portion 242.

[0032] In an embodiment of the present application, the guide rail 21 is arranged in an L shape, the upper end of the guide rail 21 is fixedly connected to one side of the fixed bracket, and the lower end of the guide rail 21 passes through the fixed bracket and is fixedly connected to one side of the fixed panel. The slider 22 is slidably arranged on the guide rail 21, wherein the slider 22 can directly contact the guide rail 21 to slide, or it can slide on the guide rail 21 by rotating the ball bearings arranged on the inner circumference of the slider 22. The specific arrangement is based on the usage scenario, and the embodiment of the present application does not make specific restrictions. The outer clamp 23 is an inverted L-shaped plate, wherein the horizontal portion of the outer clamp 23 is provided with a V-shaped groove, and the angle of the V-shaped groove is 90-120 degrees, so that the outer clamp 23 is in contact with the flange and can clamp the flange. The material of the outer clamp 23 can be made of steel, or it can be made of steel that has been quenched, so as to reduce the damage caused to the flange by the outer clamp 23 when the outer clamp 23 is positioned. Specifically, the hardness of saigang is 80-85 Shore D, and the hardness of metal steel is HRC50+. The hardness of saigang is much lower than the hardness of metal, so that the flange will not be scratched during clamping. The vertical portion of the outer clamp and the slider 22 can be integrally formed or fixedly connected by welding or bolting, which is not specifically limited in the embodiment of the present application. The driving portion 241 and the driven portion 242 are both rectangular plate-shaped, wherein the driving portion 241 and the driven portion 242 are fixedly arranged, wherein the angle between the extended lines of the driving portion 241 and the driven portion 242 is 120-165 degrees, and the length of the driving portion 241 is greater than the length of the driven portion 242. When the driving member is started, it first pushes the driving portion 241 of the swing arm 24, and then the driving portion 241 drives the driven portion 242 to move, thereby making the entire process more labor-saving. Bearings are fixedly installed on the outer circumference of the first rotating shaft 27 and the second rotating shaft 28 to reduce the friction between the first rotating shaft 27 and the first sliding groove 26, and the friction between the second rotating shaft 28 and the second sliding groove 43. This prevents damage to the swing arm 24 caused by the first rotating shaft 27 sliding in the first sliding groove 26 for a long time, and the second rotating shaft 28 sliding in the second sliding groove 43 for a long time.

[0033] During specific use, the driving member is started, and when the driving member contracts, the driving part 241 moves toward one end close to the fixed base plate, thereby causing the driven part 242 to rotate toward the fixed base plate, and then the driven part 242 drives the slider 22 to move toward the flange on the guide rail 21, thereby causing the outer clamp 23 to contact the outer peripheral side of the flange and fix the flange.

[0034] Combine Figure 2 and Figure 3In a specific embodiment of the application, the support base 12 is horizontally provided with a rotating groove 34, and the inner support assembly 3 includes a rotating plate 31, a movable guide plate 32, and an inner support plate 33. The rotating plate 31 is rotatably set in the rotating groove 34, and an arc guide groove 35 is provided on the rotating plate 31, and a plurality of arc guide grooves 35 are arranged at intervals along the circumference of the rotating plate 31; the movable guide plate 32 is rotatably set on one side of the rotating plate 31, and the movable guide plate 32 is horizontally provided with a horizontal guide groove 36, and a plurality of horizontal guide grooves 36 are arranged at intervals along the horizontal direction of the movable guide plate 32, and each horizontal guide groove 36 is arranged in a one-to-one correspondence with the arc guide groove 35; the bottom end of the inner support plate 33 is slidably connected to the arc guide groove 35, and the circumferential side of the inner support plate 33 is slidably set in the horizontal guide groove 36, and each horizontal guide groove 36 corresponds to an inner support plate 33. A connecting member is provided between the outer clamp 23 and the rotating plate 31 , and the connecting member is a pull rod 44 . One end of the pull rod 44 is fixedly provided on one end of the outer clamp 23 and is rotatably connected thereto, and the other end of the pull rod 44 is rotatably connected to one end of the rotating plate 31 .

[0035] In this embodiment, the support base 12 is provided with a mating hole along its axis. The rotating plate 31 is annular and rotatably embedded within the rotating groove 34. The movable guide plate 32 has the same shape and specifications as the rotating plate 31, with the inner circumference of the rotating plate 31 fixed to the circumference of the mating hole. In other words, the cross-section of the support base 12 and the movable guide plate 32 is an inverted U-shaped arrangement. The inner support plate 33 is L-shaped, with a cylindrical rod fixed to its lower end. The cylindrical rod passes through the horizontal guide rail 21 and is positioned within the arcuate guide groove 35, allowing the cylindrical rod to move along the arcuate guide groove 35. The rotating groove 34 is annular and has specifications sufficient to accommodate the rotation of the rotating plate 31. The horizontal guide groove 36 is arranged in an umbrella-like shape on the movable guide plate 32. The horizontal guide groove 36 is a closed groove and is connected to the arcuate guide groove 35. The pull rod 44 can be round or square, and this embodiment is not particularly limited. When the slider 22 moves away from the support base 12 under the action of the driving member, the rotating plate 31 rotates in the opposite direction through the transmission of the pull rod 44, driving all the inner support plates 33 to shrink toward the center along the horizontal guide groove 36 and be in a state of approaching each other.

[0036] During specific use, the flange is placed on the movable guide plate 32, wherein the inner circumference of the flange is sleeved on the outer circumference of the inner support plate 33, and the driving member is started to move downward, thereby driving the swing arm 24 to rotate. When the swing arm 24 rotates, it pushes the slider 22 to move toward the end close to the support base 12. When the slider 22 moves, it pushes the pull rod 44 to move toward the end away from the guide rail 21. The movement of the pull rod pushes the rotating plate 31 to rotate, and then the arc guide groove 35 rotates, causing the cylindrical rod to slide along the arc guide groove 35, and then driving the inner support plate 33 to move along the horizontal guide rail 21 toward the inner circumference of the flange, thereby pressing the inner circumference of the flange tightly. At the same time, the outer clamp 23 also presses the outer circumference of the flange tightly, so that the flange can be quickly positioned. It should be noted that when the pull rod 44 moves, the connection between the pull rod 44 and the rotating plate 31 and the connection between the pull rod 44 and the slider 22 will have a rotation angle.

[0037] Replay Figure 2 In a specific embodiment of the application, a second slide groove 43 is provided at the lower end of the swing arm 24, and the driving component includes a hydraulic cylinder 41 and a driving plate 42. The fixed end of the hydraulic cylinder 41 is fixedly provided on one side of the fixed base 1, and the telescopic end of the hydraulic cylinder 41 passes through the fixed base 1; the driving plate 42 is fixedly provided at the telescopic end of the hydraulic cylinder 41, and a third rotating shaft 45 is fixedly provided on both sides of the driving plate 42, and the free end of the third rotating shaft 45 is slidably provided in the second slide groove 43.

[0038] In this embodiment, the drive plate 42 is square and fixed to the telescopic end of the hydraulic cylinder 41. The fixing method is determined based on the specific application. The drive plate 42 is made of rigid material. During operation, the hydraulic cylinder 41 is activated, causing the telescopic end of the hydraulic cylinder 41 to contract, thereby driving the drive plate 42 toward the fixed base. The second chute 43 drives the driving portion 241 of the swing arm 24 to rotate toward the end closer to the fixed base, thereby causing the driven portion 242 of the swing arm 24 to move toward the end closer to the support base 12.

[0039] The implementation principle of the embodiment of the present application is: the flange is placed on the movable guide plate 32, wherein the inner peripheral side of the flange is sleeved on the outer peripheral side of the inner support plate 33, and the hydraulic cylinder 41 is started to shorten the telescopic end of the hydraulic cylinder 41, thereby driving the driving plate 42 to move toward the direction close to the fixed base plate, and the second slide groove 43 drives the driving part 241 of the swing arm 24 to rotate toward the end close to the fixed base plate, thereby causing the driven part 242 of the swing arm 24 to move toward the end close to the support base 12. When the swing arm 24 rotates, it pushes the slider 22 to move toward the end close to the support base 12. When the slider 22 moves, it pushes the pull rod 44 to move toward the end away from the guide rail 21. The movement of the pull rod pushes the rotating plate 31 to rotate, and then the arc guide groove 35 rotates, causing the cylindrical rod to slide along the arc guide groove 35, and then driving the inner support plate 33 to move along the horizontal guide rail 21 toward the inner side of the flange, and then pressing the inner side of the flange tightly. At the same time, the outer clamp 23 also presses the outer side of the flange tightly, so that the flange can be positioned quickly.

[0040] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A positioning tool for flange processing, characterized in that: include: A fixed base (1), wherein the fixed base (1) is fixedly arranged on the ground; A support base (12), the support base (12) being fixedly arranged on the fixed base (1), and a positioning hole being provided on the support base (12); An inner support assembly (3), the inner support assembly (3) being slidably disposed on the support base (12); A clamping assembly (2), wherein the clamping assembly (2) is slidably disposed on the fixed base (1) to clamp the outer peripheral side of the flange, and the clamping assembly (2) drives the inner support assembly (3) through the connecting piece to open the inner peripheral side of the flange while clamping the flange; A driving member is fixedly arranged on one side of the fixed base (1), and the driving member drives the inner support assembly (3) and the clamping assembly (2) to move.

2. A positioning tool for flange processing according to claim 1, characterized in that: The clamping assembly (2) comprises: A guide rail (21), the guide rail (21) being fixedly arranged on one side of the support base (12), and a first rotating shaft (27) being fixedly arranged on both sides of the guide rail (21); A slider (22), the slider (22) is slidably arranged on the guide rail (21), the slider (22) moves horizontally along the guide rail (21), and a second rotating shaft (28) is fixedly arranged on both sides of the slider (22); An outer clamp (23), the outer clamp (23) being fixedly disposed on the slider (22), the outer clamp (23) being in contact with the flange; A swing arm (24), wherein two swing arms (24) are symmetrically arranged along the moving axis of the slider (22), the middle section of each swing arm (24) is rotatably arranged with the first rotating shaft (27), the upper end of each swing arm (24) is slidably connected to the second rotating shaft (28), and the lower end of each swing arm (24) is slidably connected to the driving member; The upper end of each swing arm (24) is provided with a first slide groove (26), the second rotating shaft (28) is slidably arranged in the first slide groove (26), and two groups of the swing arms (24) are symmetrically arranged along the central axis of the fixed base (1).

3. A positioning tool for flange processing according to claim 2, characterized in that: The support base (12) is horizontally provided with a rotation groove (34), and the inner support assembly (3) comprises: A rotating plate (31), the rotating plate (31) being rotatably disposed in the rotating groove (34), the rotating plate (31) being provided with an arc-shaped guide groove (35), and a plurality of the arc-shaped guide grooves (35) being spaced apart along the circumference of the rotating plate (31); A movable guide plate (32), the movable guide plate (32) being rotatably arranged on one side of the rotating plate (31), the movable guide plate (32) being horizontally provided with a horizontal guide groove (36), a plurality of the horizontal guide grooves (36) being arranged at intervals along the horizontal direction of the movable guide plate (32), and each of the horizontal guide grooves (36) being arranged in a one-to-one correspondence with the arc-shaped guide groove (35); An inner support plate (33), the bottom end of the inner support plate (33) is slidably connected to the arc-shaped guide groove (35), the peripheral side of the inner support plate (33) is slidably arranged in the horizontal guide groove (36), and each horizontal guide groove (36) is correspondingly provided with an inner support plate (33).

4. A positioning tool for flange processing according to claim 2, characterized in that: A second sliding groove (43) is provided at the lower end of the swing arm (24), and the driving member comprises: A hydraulic cylinder (41), wherein the fixed end of the hydraulic cylinder (41) is fixedly arranged on one side of the fixed base (1), and the telescopic end of the hydraulic cylinder (41) passes through the fixed base (1); A driving plate (42) is fixedly provided at the telescopic end of the hydraulic cylinder (41), and a third rotating shaft (45) is fixedly provided on both sides of the driving plate (42), and a free end of the third rotating shaft (45) is slidably provided in the second sliding groove (43).

5. A positioning tool for flange processing according to claim 3, characterized in that: A connecting member is provided between the outer clamp (23) and the rotating plate (31), and the connecting member is a pull rod (44). One end of the pull rod (44) is fixedly provided on one end of the outer clamp (23) and is rotatably connected thereto, and the other end of the pull rod (44) is rotatably connected to one end of the rotating plate (31).

6. A positioning tool for flange processing according to claim 3, characterized in that: Two groups of the clamping components (2) are symmetrically arranged along the central axis of the support base (12).

7. A positioning tool for flange processing according to claim 2, characterized in that: A V-shaped opening is provided at one end of the outer clamp (23) close to the outer periphery of the flange.

8. A positioning tool for flange processing according to claim 4, characterized in that: The swing arm (24) includes a driving portion (241) and a driven portion (242), wherein the driving portion (241) is slidably connected to the driving plate (42) via a second sliding groove (43), and the driven portion (242) is slidably connected to the slider (22) via a first sliding groove (26), and the length of the driving portion (241) is greater than the length of the driven portion (242).

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