A positioning tool for flange processing

Abstract

The present invention discloses a positioning tool for flange processing, which belongs to the technical field of flange processing. A positioning tool for flange processing includes a support frame, a first screw rod is rotatably arranged inside the support frame, and a fixed frame is slidably connected to the first screw rod, a second screw rod is rotatably arranged inside the fixed frame, and a base is slidably connected to the second screw rod, a driving motor, an external clamping mechanism and an internal clamping mechanism are arranged, and when in use, the flange workpiece is placed on the top of the processing table and the driving motor is started, and the operation of the first driving mechanism and the operation of the fifth gear are driven by the second gear so that the external clamping mechanism and the internal clamping mechanism clamp the flange workpiece. Positioning and clamping are performed inside and outside the flange workpiece respectively, thereby avoiding operational errors caused by human negligence, and at the same time making the positioning of the flange workpiece more accurate and improving the stability of the clamping, effectively avoiding displacement, shaking and the like.

Description

Technical Field

[0001] The invention relates to the technical field of flange processing, and more specifically to a positioning tool for flange processing. Background Art

[0002] In the field of mechanical manufacturing, flanges are an important connecting component and are widely used in pipelines, mechanical equipment, etc. Their processing accuracy directly affects the performance and reliability of the entire system.

[0003] In the traditional flange processing process, positioning and clamping are crucial links. However, the existing positioning tooling has many disadvantages. On the one hand, the clamping mechanism of some positioning tooling is cumbersome to operate and requires frequent manual adjustment, which not only consumes a lot of time and manpower costs, but also easily causes operational errors due to human negligence during frequent operations, further reducing production efficiency. On the other hand, the common clamping method is difficult to ensure the precise positioning of flanges of different specifications, resulting in displacement and shaking of the flange during the processing process, which greatly affects the processing accuracy and causes an increase in the scrap rate. Therefore, in order to solve the above problems, the existence of a positioning tool for flange processing is crucial. Summary of the invention

[0004] The purpose of the present invention is to provide a positioning tool for flange processing to solve the problems raised in the above background technology.

[0005] A positioning tool for flange processing, comprising a support frame, a first screw rod is rotatably arranged inside the support frame, and a fixed frame is slidably connected to the first screw rod, a second screw rod is rotatably arranged inside the fixed frame, and a base is slidably connected to the second screw rod, a processing table is rotatably arranged inside the base, an external clamping mechanism is slidably arranged on the top of the processing table, an internal clamping mechanism is slidably arranged on the top of the processing table inside the external clamping mechanism, the top of the processing table fixes and clamps a flange workpiece through the external clamping mechanism and the internal clamping mechanism, and a lifting mechanism is telescopically arranged on the top of the processing table below the flange workpiece; A second motor seat is fixedly provided at the bottom of the processing table, a driving motor is fixedly provided at the top of the second motor seat, a driving shaft is fixedly connected to the top output end of the driving motor, a second gear is fixedly sleeved on the outside of the driving shaft inside the processing table, the second gear is rotatably provided inside the processing table, a first driving mechanism is meshedly connected to one side of the second gear, a fifth gear is fixedly sleeved on the top of the driving shaft inside the processing table, the fifth gear is rotatably provided inside the processing table, and a second driving mechanism is fixedly provided on one side of the bottom of the base.

[0006] Preferably, the first driving mechanism includes four third gears meshingly connected to the outside of the second gear, the four third gears are all rotatably arranged inside the processing table, one side of the four third gears are meshingly connected with the fourth gear, the fourth gears are all rotatably arranged inside the processing table, the top of the fourth gear is fixedly connected with the first bevel gear, the first bevel gears are all rotatably arranged inside the processing table, one side of the first bevel gears are meshingly connected with the second bevel gear, the second bevel gears are all rotatably arranged inside the processing table, one side of the second bevel gears are fixedly connected with the third screw rod, the third screw rod is rotatably arranged inside the processing table, and the external clamping mechanism includes four first sliders slidably arranged on the top of the processing table, the four first sliders are respectively threadedly connected to the outside of the four third screw rods, and slide inward and outward synchronously on the top of the processing table through the third screw rod.

[0007] Preferably, the external clamping mechanism also includes four clamp block fixing seats respectively fixedly connected to the tops of the four first sliding blocks, the four clamp block fixing seats are all arc-shaped, the inner sides of the four clamp block fixing seats are all fixedly connected with the first clamp blocks, and the inner sides of the four first clamp blocks are all tightly fitted to the outer side of the flange workpiece.

[0008] Preferably, the top scroll of the fifth gear is provided with a guide rail, and the internal clamping mechanism includes four second clamping blocks slidably arranged on the top of the processing table, the four second clamping blocks are fixedly provided with a second slider at the bottom, the four second sliders are slidably arranged inside the processing table, and two clamping rods are fixedly provided at the bottom of the second slider, and are clamped on the outside of the guide rail through the two clamping rods.

[0009] Preferably, the lifting mechanism includes a support plate telescopically arranged on the top of the processing table, the top of the support plate is snap-connected with a placing table, the top of the placing table is tightly fitted with the top of the flange workpiece, four threaded cylinders are fixedly arranged on the outer side of the bottom of the support plate, the inner sides of the four threaded cylinders are threadedly connected with threaded columns, the bottoms of the four threaded columns are fixedly connected with a sixth gear, the four sixth gears are rotatably arranged on the inner side of the processing table, the four sixth gears are meshedly connected to the outer side of the fifth gear, an anti-slip pad is fixedly arranged on the top of the placing table, four adjustment columns are fixedly arranged on the bottom of the placing table, and are snap-connected to the top of the support plate through the four adjustment columns, and the heights of the four adjustment columns are determined by customization.

[0010] Preferably, a sliding seat is fixedly provided at the bottom of the four clamping block fixing seats, the four sliding seats are respectively slidably provided inside the first sliding block, threaded rods are rotatably provided inside the four first sliding blocks, the four threaded rods are respectively threadedly connected to the inner sides of the four sliding seats, and one side of the four threaded rods respectively passes through the four first sliding blocks and is fixedly connected with a cross adjustment head.

[0011] Preferably, rollers are rotatably arranged on one side of the two clamping rods, the two rollers are tightly fitted to the two sides of the guide rail, and the two clamping rods slide on the two sides of the guide rail through the rollers.

[0012] Preferably, the second driving mechanism includes a first motor seat fixedly arranged on one side of the bottom of the base, a rotating motor is fixedly arranged inside the first motor seat, a first gear is fixedly connected to the top of the rotating motor inside the processing table, the first gear is rotatably arranged inside the base, meshing teeth are fixedly arranged on the outside of the processing table and are meshed with the first gear through the meshing teeth, and a plurality of sliding balls are slidably arranged inside the base on the outside of the processing table.

[0013] Preferably, the inner sides of the four first clamping blocks are all fixedly provided with anti-slip protrusions, the outer sides of the first clamping blocks are all fixedly provided with clamping blocks, and are connected to the inner sides of the clamping block fixing seats through the clamping blocks, the middle parts of the outer sides of the first clamping blocks are all fixedly provided with connecting blocks, and the connecting blocks are connected to the inner sides of the clamping block fixing seats through the clamping blocks, the tops of the connecting blocks are all threadedly connected with bolts, and the bolts pass through the connecting blocks and are threadedly connected to the clamping block fixing seats.

[0014] Preferably, a cover plate is fixedly provided on the outer bottom of each of the four clamp block fixing seats, and a pointer is fixedly provided on one side of the cover plate, and a scale is provided on the top of the first sliding block on one side of the pointer.

[0015] Compared with the prior art, the advantages of the present invention are: 1. By setting a driving motor, an outer clamping mechanism and an inner clamping mechanism, when in use, place the flange workpiece on the top of the processing table and start the driving motor. The second gear drives the first driving mechanism to operate and the fifth gear to operate so that the outer clamping mechanism and the inner clamping mechanism clamp the flange workpiece. By positioning and clamping the flange workpiece inside and outside, respectively, operational errors caused by human negligence are avoided, and at the same time, the positioning of the flange workpiece is made more accurate and the stability of the clamping is improved, effectively avoiding displacement, shaking and the like.

[0016] 2. By setting the first driving mechanism, the second gear is driven to rotate through the driving shaft during use, and then the four third gears and the fourth gear outside the second gear drive the first sliders in the four sets of external clamping mechanisms to slide synchronously inward on the top of the processing table, thereby firmly clamping the outer side of the flange workpiece, and at the same time improving the positioning accuracy. By setting the clamping block fixing seat and the first clamping block, the clamping stability is further improved. By setting the internal clamping mechanism to clamp the inner hole of the flange workpiece, the positioning accuracy is further improved, and at the same time, it is not necessary to deliberately place the flange workpiece accurately during operation, which makes the operation more convenient. By setting the lifting mechanism, the sixth gear is driven to rotate through the fifth gear during use, so that the threaded column rotates and drives the threaded barrel and the support plate to move upward and downward, thereby lifting and lowering the flange workpiece, effectively facilitating the placement of the flange workpiece while facilitating the removal of the flange workpiece.

[0017] 3. By setting a sliding seat and a threaded rod, the threaded rod drives the sliding seat to adjust the clamping radius of the outer clamping mechanism and the inner clamping mechanism during use, which effectively adapts to different flange workpieces. And by setting a pointer and a scale, positioning is performed during adjustment, which effectively facilitates the operation. By setting a roller, the second slider is driven to slide inward and outward by the sliding between the guide rail and the roller set by the vortex during use, which improves the clamping synchronization and the stability of the clamping. By setting a second driving mechanism to drive the processing table to rotate, the processing is effectively facilitated. By setting an anti-slip protrusion and a connecting block, it is effectively convenient to replace the worn first clamp after multiple uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the base structure of the present invention; Figure 3 It is a schematic structural diagram of the second motor base of the present invention; Figure 4 It is a schematic diagram of the meshing tooth structure of the present invention; Figure 5 It is a cross-sectional schematic diagram of the internal structure of the meshing teeth of the present invention; Figure 6 for Figure 5 A magnified schematic diagram of the structure at B in the middle; Figure 7 for Figure 5 A schematic diagram of the structure enlargement in the middle; Figure 8 It is a schematic diagram of the structure of the processing table of the present invention; Fig. 9 It is a schematic diagram of the internal structure of the processing table of the present invention; Fig.10It is a schematic diagram of the lifting mechanism structure of the present invention; Fig.11 It is a schematic diagram of the structure of the inner clamping mechanism of the present invention; Fig.12 It is a schematic diagram of the structure of the second sliding block of the present invention; Fig.13 It is a schematic diagram of the roller structure of the present invention; Fig.14 It is a cross-sectional schematic diagram of the internal structure of the processing table of the present invention; Fig.15 It is a schematic diagram of the structure of the placement table of the present invention; Fig.16 It is a schematic diagram of the structure of the first clamping block of the present invention; Fig.17 for Fig.16 Enlarged schematic diagram of the structure at point C in the middle.

[0019] Explanation of the numbers in the figure: 1. Support frame; 10. First screw rod; 11. Fixed frame; 12. Second screw rod; 13. First motor seat; 14. Rotating motor; 15. First gear; 2. Base; 3. Processing table; 30. Second motor seat; 31. Driving motor; 32. Sliding ball; 33. Engaging teeth; 4. External clamping mechanism; 40. First slider; 41. Clamping block fixing seat; 42. First clamping block; 43. Bolt; 44. Sliding seat; 45. Threaded rod; 46. Cross adjustment head; 47. Block; 48. Connecting block; 49. Anti-slip protrusion; 5. Inner clamping mechanism; 50, second clamping block; 51, second slider; 52, clamping rod; 53, roller; 6, flange workpiece; 7, driving shaft; 70, second gear; 71, third gear; 72, fourth gear; 73, first bevel gear; 74, second bevel gear; 75, third screw rod; 76, fifth gear; 77, guide rail; 78, sixth gear; 79, threaded column; 8, lifting mechanism; 80, support plate; 81, placing table; 82, threaded cylinder; 83, adjusting column; 84, anti-slip pad; 9, cover plate; 90, pointer; 91, scale. DETAILED DESCRIPTION

[0020] Example: See Figure 1-Figure 17 A positioning tool for flange processing, comprising a support frame 1, a first screw rod 10 is rotatably arranged inside the support frame 1, and a fixed frame 11 is slidably connected through the first screw rod 10, a second screw rod 12 is rotatably arranged inside the fixed frame 11, and a base 2 is slidably connected through the second screw rod 12, a processing table 3 is rotatably arranged inside the base 2, an external clamping mechanism 4 is slidably arranged on the top of the processing table 3, an internal clamping mechanism 5 is slidably arranged inside the external clamping mechanism 4 on the top of the processing table 3, a flange workpiece 6 is fixedly clamped by the external clamping mechanism 4 and the internal clamping mechanism 5 on the top of the processing table 3, and a lifting mechanism 8 is telescopically arranged on the top of the processing table 3 below the flange workpiece 6; A second motor base 30 is fixedly provided at the bottom of the processing table 3, a driving motor 31 is fixedly provided at the top of the second motor base 30, a driving shaft 7 is fixedly connected to the top output end of the driving motor 31, a second gear 70 is fixedly sleeved on the outside of the driving shaft 7 inside the processing table 3, the second gear 70 is rotatably provided inside the processing table 3, one side of the second gear 70 is meshedly connected with the first driving mechanism, a fifth gear 76 is fixedly sleeved on the top of the driving shaft 7 inside the processing table 3, the fifth gear 76 is rotatably provided inside the processing table 3, and a second driving mechanism is fixedly provided on one side of the bottom of the base 2.

[0021] By providing a driving motor 31, an outer clamping mechanism 4 and an inner clamping mechanism 5, when in use, the flange workpiece 6 is placed on the top of the processing table 3 and then the driving motor 31 is started, and the outer clamping mechanism 4 and the inner clamping mechanism 5 clamp the flange workpiece 6 by driving the first driving mechanism and the fifth gear 76 through the second gear 70. By positioning and clamping the flange workpiece 6 inside and outside, respectively, operation errors caused by human negligence are avoided, and at the same time, the positioning of the flange workpiece 6 is made more accurate and the stability of the clamping is improved, effectively avoiding displacement, shaking and the like.

[0022] Specifically, the first driving mechanism includes four third gears 71 meshedly connected to the outside of the second gear 70, the four third gears 71 are all rotatably set inside the processing table 3, one side of the four third gears 71 are meshedly connected with the fourth gear 72, the fourth gears 72 are all rotatably set inside the processing table 3, the top of the fourth gear 72 is fixedly connected with the first bevel gear 73, the first bevel gear 73 is rotatably set inside the processing table 3, one side of the first bevel gear 73 is meshedly connected with the second bevel gear 74, the second bevel gear 74 is rotatably set inside the processing table 3, one side of the second bevel gear 74 is fixedly connected with the third screw rod 75, the third screw rod 75 is rotatably set inside the processing table 3, and the external clamping mechanism 4 includes four first sliders 40 slidably set on the top of the processing table 3, the four first sliders 40 are respectively threadedly connected to the outside of the four third screw rods 75, and slide synchronously inward and outward on the top of the processing table 3 through the third screw rod 75.

[0023] By setting up the first driving mechanism, the second gear 70 is driven to rotate through the driving shaft 7 when in use, and then the four third gears 71 and the fourth gear 72 outside the second gear 70 drive the first slider 40 in the four groups of external clamping mechanisms 4 to slide inward synchronously on the top of the processing table 3, thereby firmly clamping the outer side of the flange workpiece 6 and improving the positioning accuracy.

[0024] Specifically, the external clamping mechanism 4 also includes four clamp block fixing seats 41 respectively fixedly connected to the tops of the four first sliding blocks 40, the four clamp block fixing seats 41 are all arc-shaped, the inner sides of the four clamp block fixing seats 41 are all fixedly connected with the first clamp blocks 42, and the inner sides of the four first clamp blocks 42 are all tightly fitted to the outer side of the flange workpiece 6.

[0025] By providing the clamping block fixing seat 41 and the first clamping block 42 , the clamping stability is further improved.

[0026] Specifically, a guide rail 77 is set on the top scroll of the fifth gear 76, and the internal clamping mechanism 5 includes four second clamping blocks 50 slidably set on the top of the processing table 3, and the bottom of the four second clamping blocks 50 are fixedly provided with second sliders 51, and the four second sliders 51 are all slidably set inside the processing table 3. Two clamping rods 52 are fixedly provided at the bottom of the second slider 51, and are all engaged on the outside of the guide rail 77 through the two clamping rods 52.

[0027] By providing the inner clamping mechanism 5 to clamp the inner hole of the flange workpiece 6, the positioning accuracy is further improved. At the same time, it is not necessary to deliberately place the flange workpiece 6 accurately during operation, which makes the operation more convenient.

[0028] Specifically, the lifting mechanism 8 includes a support plate 80 telescopically arranged on the top of the processing table 3, and a placing table 81 is snap-connected to the top of the support plate 80. The top of the placing table 81 is tightly fitted on the top of the flange workpiece 6. Four threaded tubes 82 are fixedly arranged on the outer side of the bottom of the support plate 80, and the inner sides of the four threaded tubes 82 are all threadedly connected with threaded columns 79. The bottoms of the four threaded columns 79 are fixedly connected with the sixth gear 78. The four sixth gears 78 are rotatably arranged on the inner side of the processing table 3, and the four sixth gears 78 are meshed and connected to the outer side of the fifth gear 76. An anti-slip pad 84 is fixedly arranged on the top of the placing table 81, and four adjustment columns 83 are fixedly arranged on the bottom of the placing table 81, and are snap-connected to the top of the support plate 80 through the four adjustment columns 83. The heights of the four adjustment columns 83 are determined by customization.

[0029] By setting up a lifting mechanism 8, when in use, the fifth gear 76 drives the sixth gear 78 to rotate, so that the threaded column 79 drives the threaded tube 82 and the support plate 80 to move upward and downward after rotation, thereby lifting and lowering the flange workpiece 6, effectively facilitating the placement of the flange workpiece 6 and facilitating the removal of the flange workpiece 6.

[0030] Specifically, sliding seats 44 are fixedly provided at the bottom of the four clamping block fixing seats 41, and the four sliding seats 44 are respectively slidably provided inside the first sliding block 40, and threaded rods 45 are rotatably provided inside the four first sliding blocks 40, and the four threaded rods 45 are respectively threadedly connected to the inner sides of the four sliding seats 44, and one side of the four threaded rods 45 respectively passes through the four first sliding blocks 40 and is fixedly connected with a cross adjustment head 46.

[0031] By providing the sliding seat 44 and the threaded rod 45 , the threaded rod 45 drives the sliding seat 44 to adjust the clamping radius of the outer clamping mechanism 4 and the inner clamping mechanism 5 during use, thereby effectively adapting to different flange workpieces 6 .

[0032] Specifically, rollers 53 are rotatably provided at one side of the two clamping rods 52 , and the two rollers 53 are respectively tightly fitted to the two sides of the guide rail 77 , and the two clamping rods 52 slide on the two sides of the guide rail 77 through the rollers 53 .

[0033] By providing the roller 53, the second slider 51 is driven to slide inward and outward by the sliding between the guide rail 77 provided by the vortex and the roller 53 during use, thereby improving the clamping synchronization and the clamping stability.

[0034] Specifically, the second driving mechanism includes a first motor seat 13 fixedly arranged on one side of the bottom of the base 2, a rotating motor 14 is fixedly arranged inside the first motor seat 13, a first gear 15 is fixedly connected to the top of the rotating motor 14 inside the processing table 3, the first gear 15 is rotatably arranged inside the base 2, a meshing tooth 33 is fixedly arranged on the outside of the processing table 3, and is meshed with the first gear 15 through the meshing tooth 33, and a plurality of sliding balls 32 are slidably arranged inside the base 2 on the outside of the processing table 3.

[0035] The second driving mechanism is provided to drive the processing table 3 to rotate, thereby effectively facilitating the processing.

[0036] Specifically, the inner sides of the four first clamping blocks 42 are all fixedly provided with anti-slip protrusions 49, the outer sides of the first clamping blocks 42 are all fixedly provided with clamping blocks 47, and are clamped and connected to the inner sides of the clamping block fixing seats 41 through the clamping blocks 47, and the middle parts of the outer sides of the first clamping blocks 42 are all fixedly provided with connecting blocks 48, and the connecting blocks 48 are clamped and connected to the inner sides of the clamping block fixing seats 41, and the tops of the connecting blocks 48 are all threadedly connected with bolts 43, and the bolts 43 pass through the connecting blocks 48 and are threadedly connected to the clamping block fixing seats 41.

[0037] By providing the anti-slip protrusion 49 and the connecting block 48, it is effectively and conveniently possible to replace the worn first clamping block 42 after multiple uses.

[0038] Specifically, a cover plate 9 is fixedly provided at the outer bottom of each of the four clamp block fixing seats 41 , and a pointer 90 is fixedly provided at one side of the cover plate 9 , and a scale 91 is provided at the top of the first sliding block 40 at one side of the pointer 90 .

[0039] By providing the pointer 90 and the scale 91, positioning is performed during adjustment, which effectively facilitates the operation.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A positioning tool for flange processing, comprising a support frame (1), characterized in that: A first screw rod (10) is rotatably arranged on the inner side of the support frame (1), and a fixed frame (11) is slidably connected to the first screw rod (10); a second screw rod (12) is rotatably arranged on the inner side of the fixed frame (11), and a base (2) is slidably connected to the second screw rod (12); a processing table (3) is rotatably arranged on the inner side of the base (2); an external clamping mechanism (4) is slidably arranged on the top of the processing table (3); an internal clamping mechanism (5) is slidably arranged on the inner side of the external clamping mechanism (4) on the top of the processing table (3); a flange workpiece (6) is fixedly clamped on the top of the processing table (3) through the external clamping mechanism (4) and the internal clamping mechanism (5); a lifting mechanism (8) is telescopically arranged on the top of the processing table (3) below the flange workpiece (6); A second motor seat (30) is fixedly arranged at the bottom of the processing table (3), a driving motor (31) is fixedly arranged at the top of the second motor seat (30), a driving shaft (7) is fixedly connected to the top output end of the driving motor (31), a second gear (70) is fixedly sleeved on the outside of the driving shaft (7) inside the processing table (3), the second gear (70) is rotatably arranged inside the processing table (3), one side of the second gear (70) is meshingly connected to the first driving mechanism, a fifth gear (76) is fixedly sleeved on the top of the driving shaft (7) inside the processing table (3), the fifth gear (76) is rotatably arranged inside the processing table (3), and a second driving mechanism is fixedly arranged on one side of the bottom of the base (2).

2. A positioning tool for flange processing according to claim 1, characterized in that: The first driving mechanism comprises four third gears (71) meshingly connected to the outside of the second gear (70), the four third gears (71) being rotatably disposed inside the processing table (3), one side of the four third gears (71) being meshingly connected to a fourth gear (72), the fourth gears (72) being rotatably disposed inside the processing table (3), the top of the fourth gear (72) being fixedly connected to a first bevel gear (73), the first bevel gear (73) being rotatably disposed inside the processing table (3), and one side of the first bevel gear (73) being meshingly connected to A second bevel gear (74) is provided, the second bevel gears (74) are all rotatably arranged inside the processing table (3), a third screw rod (75) is fixedly connected to one side of the second bevel gear (74), the third screw rod (75) is all rotatably arranged inside the processing table (3), and the external clamping mechanism (4) comprises four first sliders (40) slidably arranged on the top of the processing table (3), the four first sliders (40) are respectively threadedly connected to the outside of the four third screw rods (75), and slide synchronously inward and outward on the top of the processing table (3) through the third screw rod (75).

3. A positioning tool for flange processing according to claim 2, characterized in that: The external clamping mechanism (4) further comprises four clamping block fixing seats (41) respectively fixedly connected to the tops of the four first sliding blocks (40), the four clamping block fixing seats (41) are all arc-shaped, the inner sides of the four clamping block fixing seats (41) are all fixedly connected to the first clamping blocks (42), and the inner sides of the four first clamping blocks (42) are all tightly fitted to the outer side of the flange workpiece (6).

4. The positioning tool for flange processing according to claim 1, characterized in that: A guide rail (77) is arranged on the top scroll of the fifth gear (76), and the inner clamping mechanism (5) comprises four second clamping blocks (50) slidably arranged on the top of the processing table (3), and second sliders (51) are fixedly arranged on the bottom of the four second clamping blocks (50), and the four second sliders (51) are slidably arranged inside the processing table (3), and two clamping rods (52) are fixedly arranged on the bottom of the second sliders (51), and are engaged with the outer side of the guide rail (77) through the two clamping rods (52).

5. The positioning tool for flange processing according to claim 1, characterized in that: The lifting mechanism (8) includes a support plate (80) which is telescopically arranged on the top of the processing table (3); a placement table (81) is snap-connected to the top of the support plate (80); the top of the placement table (81) is tightly fitted to the top of the flange workpiece (6); four threaded cylinders (82) are fixedly arranged on the outer side of the bottom of the support plate (80); the inner sides of the four threaded cylinders (82) are all threadedly connected to threaded columns (79); the bottoms of the four threaded columns (79) are fixedly connected to sixth gears (78); the four sixth gears (78) are rotatably arranged on the inner side of the processing table (3); the four sixth gears (78) are meshingly connected to the outer side of the fifth gear (76); an anti-slip pad (84) is fixedly arranged on the top of the placement table (81); four adjustment columns (83) are fixedly arranged on the bottom of the placement table (81), and are snap-connected to the top of the support plate (80) through the four adjustment columns (83); the heights of the four adjustment columns (83) are determined by customization.

6. The positioning tool for flange processing according to claim 3, characterized in that: A sliding seat (44) is fixedly arranged at the bottom of the four clamping block fixing seats (41), and the four sliding seats (44) are slidably arranged inside the first sliding block (40) respectively. A threaded rod (45) is rotatably arranged inside the four first sliding blocks (40), and the four threaded rods (45) are respectively threadedly connected to the inner side of the four sliding seats (44), and one side of the four threaded rods (45) passes through the four first sliding blocks (40) and is fixedly connected to a cross adjustment head (46).

7. The positioning tool for flange processing according to claim 4, characterized in that: A roller (53) is rotatably provided on one side of the two clamping rods (52), and the two rollers (53) are respectively tightly fitted on both sides of the guide rail (77), and the two clamping rods (52) slide on both sides of the guide rail (77) via the rollers (53).

8. The positioning tool for flange processing according to claim 1, characterized in that: The second driving mechanism comprises a first motor seat (13) fixedly arranged on one side of the bottom of the base (2); a rotating motor (14) is fixedly arranged inside the first motor seat (13); a first gear (15) is fixedly connected to the top of the rotating motor (14) inside the processing table (3); the first gear (15) is rotatably arranged inside the base (2); meshing teeth (33) are fixedly arranged on the outside of the processing table (3) and meshedly connected to the first gear (15) via the meshing teeth (33); and a plurality of sliding balls (32) are slidably arranged inside the base (2) on the outside of the processing table (3).

9. The positioning tool for flange processing according to claim 6, characterized in that: The inner sides of the four first clamping blocks (42) are all fixedly provided with anti-slip protrusions (49); the outer sides of the first clamping blocks (42) are all fixedly provided with clamping blocks (47), and are connected to the inner side of the clamping block fixing seat (41) by clamping blocks (47); the middle part of the outer side of the first clamping blocks (42) is fixedly provided with connecting blocks (48), and the connecting blocks (48) are connected to the inner side of the clamping block fixing seat (41); the tops of the connecting blocks (48) are all threadedly connected with bolts (43), and the bolts (43) pass through the connecting blocks (48) and are threadedly connected to the clamping block fixing seat (41).

10. A positioning tool for flange processing according to claim 9, characterized in that: A cover plate (9) is fixedly provided on the outer bottom of each of the four clamp block fixing seats (41), and a pointer (90) is fixedly provided on one side of the cover plate (9). A scale (91) is provided on the top of the first sliding block (40) on one side of the pointer (90).

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