Punching device for flange hole machining

Abstract

The invention relates to the technical field of flange punching, and discloses a punching device for flange hole machining, which comprises a base, a circular groove is formed in the top of the base, a rotating shaft is rotatably mounted in the middle of the bottom of the circular groove, a placement circular table is fixedly mounted at the top of the rotating shaft, and a placement groove is formed in the top of the placement circular table. A flange body is placed in the placing groove, a transmission shaft is rotatably mounted in the circular groove, an inverted-L-shaped mounting plate is fixedly mounted at the top of the base, two inverted-L-shaped sliding rods are fixedly mounted on the inner side of the inverted-L-shaped mounting plate, a sliding plate is slidably mounted between the surfaces of the two inverted-L-shaped sliding rods, and an electric telescopic cylinder is mounted at the top of the inner side of the inverted-L-shaped mounting plate; the telescopic end of the electric telescopic cylinder is fixedly connected with the top of the sliding plate. According to the punching device for flange hole machining, equal-angle rotation adjustment can be automatically conducted on a flange in the lifting drilling process, and therefore the uniformity of angle intervals between flange holes is effectively guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of flange punching, and particularly relates to a punching device for flange hole processing. Background Art

[0002] A flange is a mechanical connector used to connect pipes, valves, and equipment, facilitating installation, disassembly, and maintenance. It is usually made of metal, such as steel, stainless steel, cast iron, etc., and is fixed by bolts and nuts to form a sealed connection. Flanges are widely used in industries such as chemical engineering, petroleum, water supply, and heating. Common types include slip-on flanges, butt-welding flanges, threaded flanges, etc. According to different standards, there are various specifications such as ANSI, GB, AS, etc., with differences in the number of holes, size, and pressure rating. Reasonably selecting the type and material of the flange can ensure the safety, reliable sealing, and easy maintenance of the pipeline system.

[0003] When the traditional flange processing punching device punches the flanges one by one, it is necessary to mark the punching positions on the flange in advance. At the same time, during punching, it is necessary to accurately rotate the flange to align the marked punching position with the drill shaft. This marking and adjustment process is relatively cumbersome, reducing the efficiency and speed of flange processing punching. At the same time, if the marking accuracy is not well controlled, it is easy to cause uneven angular intervals between the holes, thus affecting the subsequent installation and use. Therefore, in view of the above problems, it is necessary to design a punching device for flange hole processing. Summary of the Invention

[0004] To achieve the above object, the present invention provides the following technical solution: A punching device for flange hole processing, including a base. A circular groove is opened at the top of the base. A rotating shaft is rotatably installed in the middle of the bottom of the circular groove through a bearing. A placing round table is fixedly installed at the top of the rotating shaft. A placing groove is opened at the top of the placing round table. A circular ring groove facilitating punching is opened at the bottom of the placing groove. A flange body is placed inside the placing groove. The punching position of the flange body is located above the circular ring groove. A transmission shaft for driving the rotating shaft is rotatably installed inside the circular groove. An inverted L-shaped mounting plate is fixedly installed at the top of the base. Two inverted L-shaped sliding rods are fixedly installed inside the inverted L-shaped mounting plate. A sliding plate is slidably installed between the surfaces of the two inverted L-shaped sliding rods. An electric telescopic cylinder is installed at the top inside the inverted L-shaped mounting plate. The telescopic end of the electric telescopic cylinder is fixedly connected to the top of the sliding plate. An electric drilling machine located above the circular ring groove is installed on one side of the sliding plate. A transmission vertical plate for driving one end of the transmission shaft is fixedly installed at the bottom of the sliding plate.

[0005] Preferably, a first worm gear is fixedly installed at the lower part of the rotating shaft, a first worm meshed with the first worm gear is fixedly installed on one side of the transmission shaft, a ratchet wheel is fixedly installed in the middle of the transmission shaft, a pawl connected to the ratchet wheel is rotatably connected inside the circular groove through a movable shaft, and a first spring is fixedly connected between the upper part of the pawl and the upper part of the circular groove, so that the transmission shaft can only rotate in one direction.

[0006] Preferably, a vertical groove is formed at the top of the base, one end of the transmission shaft penetrates and extends into the vertical groove and is connected with a one-way transmission member, the lower part of the transmission vertical plate extends into the vertical groove and is in sliding contact with one side of the vertical groove, and a toothed plate connected to the one-way transmission member is fixedly installed on one side of the lower part of the transmission vertical plate.

[0007] Preferably, the one-way transmission member includes a round block fixedly installed at one end of the transmission shaft, two sleeves are symmetrically and fixedly installed on the circumferential surface of the round block, an outer toothed ring located between the two sleeves is movably sleeved on the circumferential surface of the round block, and the toothed plate is meshed with the outer toothed ring.

[0008] Preferably, a plurality of right-angled triangular grooves are annularly and equidistantly formed on the inner circumferential surface of the outer toothed ring, three inverted T-shaped installation grooves are annularly and equidistantly formed on the circumferential surface of the round block, sliders are slidably installed in the middle of the inverted T-shaped installation grooves, second springs are fixedly connected between one side of each slider and the inside of the corresponding inverted T-shaped installation groove, and right-angled triangular inserts movably inserted into the right-angled triangular grooves are fixedly installed on the other side of each slider.

[0009] Preferably, two notch grooves are symmetrically formed at the edge of the top of the placing round table, two moving rods are movably inserted through the two notch grooves and the inside of the placing groove, arc-shaped clamping plates for clamping and fixing the circumferential surface of the flange body are fixedly installed at the ends of the two moving rods located inside the placing groove, vertical inner grooves are formed at the bottoms of the two notch grooves, moving blocks are slidably installed in the two vertical inner grooves, and the tops of the two moving blocks are respectively fixedly connected with the two moving rods.

[0010] Preferably, an inverted convex circular inner cavity is formed in the middle of the placing round table, two connecting rods are movably inserted through the lower parts of the two vertical inner grooves and the inverted convex circular inner cavity, the opposite ends of the two connecting rods are respectively fixedly connected with the lower parts of the two moving blocks, the upper parts of the ends of the two connecting rods located inside the inverted convex circular inner cavity are rotatably connected with connecting curved rods through movable shafts, an adjusting shaft is rotatably installed inside the inverted convex circular inner cavity through a bearing, a disc is fixedly installed at the upper part of the adjusting shaft, a fixed block is fixedly installed on the circumferential surface of the disc, the bottoms of the two fixed blocks are movably embedded with rotating balls, and the upper parts of the two connecting curved rods are respectively fixedly connected with the surfaces of the two rotating balls.

[0011] Preferably, a second worm gear is fixedly installed at the lower part of the adjusting shaft. A second worm meshing with the second worm gear is rotatably installed inside the inner cavity of the inverted convex circle through a bearing. A circular concave notch is formed on the circumferential surface of the placing frustum. One end of the second worm extends into the circular concave notch and a runner is fixedly installed thereon, so as to be able to centeringly clamp and fix the flange body inside the placing groove.

[0012] Preferably, a plurality of balls in rolling contact with the circumferential surface of the placing frustum are annularly and equidistantly installed at the upper part of the circular groove, so that the placing frustum can rotate stably and effectively.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] (1) The punching device for flange hole processing has a lifting drilling and equal-angle one-way rotation adjustment structure. This lifting drilling and equal-angle one-way rotation adjustment structure can automatically perform equal-angle rotation adjustment on the flange during the lifting drilling process, thus effectively ensuring the uniformity of the angular intervals between flange holes, effectively improving the quality of flange hole processing, as well as improving the efficiency and speed of flange processing and punching, and also ensuring subsequent installation and use. At the same time, the structure of this punching device is simply designed, convenient to use, and the drilling and equal-angle rotation adjustment are stable and reliable. Its performance can meet the use requirements of flange hole processing;

[0015] (2) When the transmission shaft rotates clockwise, it will drive the ratchet to rotate. The rotation of the ratchet will squeeze and move the pawl upward to rotate and compress the first spring. At the same time, through the elastic restoring force of the first spring, the pawl will always be engaged with the ratchet. At the same time, through the engagement of the pawl and the ratchet, the transmission shaft cannot rotate counterclockwise, so that the transmission shaft can only rotate in one direction; the rotation of the transmission shaft will drive the first worm gear to drive the first worm gear to rotate through the first worm. The rotation of the first worm gear will drive the rotating shaft and the placing frustum to rotate, so that the flange body inside the placing groove can only rotate in one direction; at the same time, the extension of the electric telescopic cylinder will push the sliding plate to slide downward on the surfaces of the two inverted L-shaped sliding rods. The downward movement of the sliding plate will drive the electric drilling machine and the transmission vertical plate to move downward. The downward moving electric drilling machine can perform a single punching operation on the flange body through the circular groove; then, through the contraction of the electric telescopic cylinder, the electric drilling machine is driven to move upward to complete the opening of one hole;

[0016] (3) When the skateboard drives the transmission vertical plate to move downward, it will drive the toothed plate to move downward synchronously. The downward moving toothed plate will drive the external gear ring to rotate clockwise. At the same time, due to the action of the ratchet pawl and the ratchet wheel, the transmission shaft cannot rotate counterclockwise. The clockwise rotation of the external gear ring will squeeze the right-angled triangular insert block through the right-angled triangular groove, causing the slider to compress the second spring. At the same time, through the elastic restoring force of the second spring, the right-angled triangular insert block can effectively be inserted into the right-angled triangular groove again; when the skateboard drives the transmission vertical plate and the toothed plate to move upward, due to the limitation of the right-angled triangular insert block on the right-angled triangular groove, the toothed plate will drive the round block and the transmission shaft to rotate clockwise; and the single downward and upward movement of the toothed plate can make the placement turntable drive the flange body to rotate at an equal angle, so that the electric drilling machine can evenly drill holes in the flange body;

[0017] (4) Place the flange body inside the placement groove between the two arc-shaped clamping plates. Then, rotate the second worm through the rotating wheel. The rotation of the second worm will drive the second worm gear and drive the adjusting shaft to rotate. The rotation of the adjusting shaft will drive the disc and the two fixing blocks to rotate. The two fixing blocks will pull the two linkage rods to move relatively through the rotatable spherical balls embedded movably and the two rotatable connecting curved rods. The two relatively moving linkage rods will drive the two arc-shaped clamping plates to move towards the flange body through the two moving blocks and the two moving rods. Finally, the two arc-shaped clamping plates will clamp and fix the flange body to maintain the stability of drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0019] In the drawings:

[0020] Figure 1 is a front view structural schematic diagram of the drilling device for flange hole processing of the present invention;

[0021] Figure 2 is a front sectional structural schematic diagram of the drilling device for flange hole processing of the present invention;

[0022] Figure 3 is for the present invention Figure 2 partial structural schematic diagram;

[0023] Figure 4 is for the present invention Figure 3 partial structural schematic diagram;

[0024] Figure 5 is for the present invention Figure 4 partial structural schematic diagram;

[0025] Figure 6Schematic diagram of a partial side cross-section of a punching device for processing flange holes of the present invention;

[0026] Figure 7 Front view structural diagram of a one-way transmission member of the present invention;

[0027] Figure 8 For the present invention Figure 7 Cross-sectional structural diagram;

[0028] In the figure: 1, base; 2, circular groove; 3, rotating shaft; 4, placing round table; 5, placing groove; 6, circular ring groove; 7, flange body; 8, transmission shaft; 9, inverted L-shaped mounting plate; 10, inverted L-shaped slide bar; 11, slide plate; 12, electric telescopic cylinder; 13, electric drilling machine; 14, transmission vertical plate; 15, first worm gear; 16, ratchet wheel; 17, ratchet pawl; 18, first spring; 19, vertical groove; 20, one-way transmission member; 21, toothed plate; 22, round block; 23, ferrule; 24, external gear ring; 25, right-angled triangular groove; 26, inverted T-shaped mounting groove; 27, slider; 28, second spring; 29, right-angled triangular plug; 30, notch groove; 31, moving rod; 32, arc-shaped clamping plate; 33, vertical inner groove; 34, moving block; 35, inverted convex circular inner cavity; 36, connecting rod; 37, connecting curved rod; 38, adjusting shaft; 39, disc; 40, fixed block; 41, rotating ball; 42, second worm gear; 43, second worm; 44, circular notch; 45, runner. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1, consisting of Figures 1 to 8Given that, the present invention includes a base 1. A circular groove 2 is formed at the top of the base 1. A rotating shaft 3 is rotatably installed in the middle of the bottom of the circular groove 2 through a bearing. A placing frustum 4 is fixedly installed at the top of the rotating shaft 3. A placing groove 5 is formed at the top of the placing frustum 4. A circular ring groove 6 facilitating hole punching is formed at the bottom of the placing groove 5. A flange body 7 is placed inside the placing groove 5. The hole punching position of the flange body 7 is above the circular ring groove 6. A transmission shaft 8 for driving the rotating shaft 3 is rotatably installed inside the circular groove 2. An inverted L-shaped mounting plate 9 is fixedly installed at the top of the base 1. Two inverted L-shaped sliding rods 10 are fixedly installed inside the inverted L-shaped mounting plate 9. A sliding plate 11 is slidably installed between the surfaces of the two inverted L-shaped sliding rods 10. An electric telescopic cylinder 12 is installed at the top inside the inverted L-shaped mounting plate 9. The telescopic end of the electric telescopic cylinder 12 is fixedly connected to the top of the sliding plate 11. An electric drilling machine 13 located above the circular ring groove 6 is installed on one side of the sliding plate 11. A transmission vertical plate 14 for driving one end of the transmission shaft 8 is fixedly installed at the bottom of the sliding plate 11.

[0031] The punching device for flange hole processing has a lifting drilling and equal-angle one-way rotation adjustment structure. This lifting drilling and equal-angle one-way rotation adjustment structure can automatically perform equal-angle rotation adjustment on the flange during the lifting drilling process, thereby effectively ensuring the uniformity of the angular intervals between flange holes, effectively improving the quality of flange hole processing, as well as improving the efficiency and speed of flange processing and punching, and also ensuring subsequent installation and use. At the same time, the structure of this punching device is simply designed, convenient and easy to use, and the drilling and equal-angle rotation adjustment are stable and reliable. Its performance can meet the use requirements of flange hole processing.

[0032] In the second embodiment, on the basis of the first embodiment, a first worm gear 15 is fixedly installed at the lower part of the rotating shaft 3. A first worm meshed with the first worm gear 15 is fixedly installed on one side of the transmission shaft 8. A ratchet wheel 16 is fixedly installed in the middle of the transmission shaft 8. An arrester 17 connected to the ratchet wheel 16 is rotatably connected inside the circular groove 2 through a movable shaft. A first spring 18 is fixedly connected between the upper part of the arrester 17 and the upper part of the circular groove 2, so that the transmission shaft 8 can only rotate in one direction.

[0033] Specifically, as shown in the attached Figure 5 When the transmission shaft 8 rotates clockwise, it will drive the ratchet wheel 16 to rotate. The rotation of the ratchet wheel 16 will squeeze and move the arrester 17 upward and rotate to compress the first spring 18. At the same time, through the elastic restoring force of the first spring 18, the arrester 17 will always be engaged with the ratchet wheel 16. At the same time, through the engagement of the arrester 17 and the ratchet wheel 16, the transmission shaft 8 cannot rotate counterclockwise, so that the transmission shaft 8 can only rotate in one direction.

[0034] The rotation of the transmission shaft 8 drives the first worm gear to drive the first worm wheel 15 to rotate. The rotation of the first worm wheel 15 drives the rotating shaft 3 and the placement turntable 4 to rotate, so that the flange body 7 inside the placement groove 5 can only rotate in one direction. At the same time, the extension of the electric telescopic cylinder 12 pushes the slide plate 11 to slide down on the surfaces of the two inverted L-shaped slide rods 10. The downward movement of the slide plate 11 drives the electric drilling machine 13 and the transmission vertical plate 14 to move downward. The downward-moving electric drilling machine 13 can perform a single punching operation on the flange body 7 through the circular groove 6. Then, the contraction of the electric telescopic cylinder 12 drives the electric drilling machine 13 to move upward to complete the opening of one hole.

[0035] Embodiment 3: On the basis of Embodiment 1, a vertical groove 19 is opened at the top of the base 1. One end of the transmission shaft 8 penetrates and extends into the interior of the vertical groove 19 and is connected with a one-way transmission member 20. The lower part of the transmission vertical plate 14 extends into the interior of the vertical groove 19 and is in sliding contact with one side of the vertical groove 19. At the same time, a toothed plate 21 connected to the one-way transmission member 20 is fixedly installed on one side of the lower part of the transmission vertical plate 14. The one-way transmission member 20 includes a round block 22 fixedly installed at one end of the transmission shaft 8. Two sleeves 23 are symmetrically and fixedly installed on the circumferential surface of the round block 22. An external gear ring 24 is movably sleeved on the circumferential surface of the round block 22 between the two sleeves 23. The toothed plate 21 is meshed and connected with the external gear ring 24.

[0036] A number of right-angled triangular grooves 25 are annularly and equidistantly opened on the inner circumferential surface of the external gear ring 24. Three inverted T-shaped installation grooves 26 are annularly and equidistantly opened on the circumferential surface of the round block 22. Sliders 27 are slidably installed in the middle of the inverted T-shaped installation grooves 26. A second spring 28 is fixedly connected between one side of each slider 27 and the interior of the corresponding inverted T-shaped installation groove 26. A right-angled triangular plug 29 that is movably inserted into the interior of the right-angled triangular groove 25 is fixedly installed on the other side of each slider 27. Thus, the downward movement of the transmission vertical plate 14 will not drive the transmission shaft 8 to rotate counterclockwise, and the transmission vertical plate 14 and the toothed plate 21 can move downward, and at the same time, the upward-moving transmission vertical plate 14 and toothed plate 21 can effectively drive the transmission shaft 8 to rotate clockwise for adjustment.

[0037] Specifically, when the slide plate 11 drives the transmission vertical plate 14 to move downward, it will drive the toothed plate 21 to move downward synchronously. The downward-moving toothed plate 21 drives the external gear ring 24 to rotate clockwise (as shown in FIGS. Figure 6 and 7 8), and at the same time, due to the action of the ratchet 16 and the pawl 17, the transmission shaft 8 cannot rotate counterclockwise. The clockwise rotation of the external gear ring 24 squeezes the right-angled triangular plug 29 through the right-angled triangular groove 25, causing the slider 27 to compress the second spring 28. At the same time, the elastic restoring force of the second spring 28 enables the right-angled triangular plug 29 to effectively snap into the interior of the right-angled triangular groove 25 again.

[0038] When the skateboard 11 drives the transmission vertical plate 14 and the toothed plate 21 to move upward, due to the limitation of the right-angled triangular insert block 29 on the right-angled triangular groove 25, the toothed plate 21 will drive the round block 22 and the transmission shaft 8 to rotate clockwise; and the single downward and upward movement of the toothed plate 21 can make the placement round table 4 drive the flange body 7 to rotate at an equal angle, so that the electric drilling machine 13 can evenly drill holes in the flange body 7.

[0039] Embodiment 4, on the basis of Embodiment 1, two notch grooves 30 are symmetrically opened at the edge of the top of the placement round table 4. Two moving rods 31 are movably inserted through the inside of the two notch grooves 30 and the placement groove 5. The ends of the two moving rods 31 located inside the placement groove 5 are fixedly installed with arc-shaped clamping plates 32 for clamping and fixing the circumferential surface of the flange body 7. Vertical inner grooves 33 are opened at the bottoms of the two notch grooves 30. Moving blocks 34 are slidably installed inside the two vertical inner grooves 33. The tops of the two moving blocks 34 are fixedly connected to the two moving rods 31 respectively.

[0040] An inverted convex circular inner cavity 35 is opened in the middle of the placement round table 4. Two linking rods 36 are movably inserted through the lower parts of the two vertical inner grooves 33 and the inverted convex circular inner cavity 35. The opposite ends of the two linking rods 36 are fixedly connected to the lower parts of the two moving blocks 34 respectively. The upper parts of the ends of the two linking rods 36 located inside the inverted convex circular inner cavity 35 are rotatably connected to connecting curved rods 37 through movable shafts. An adjusting shaft 38 is rotatably installed inside the inverted convex circular inner cavity 35 through a bearing. A disc 39 is fixedly installed on the upper part of the adjusting shaft 38. Fixed blocks 40 are fixedly installed on the circumferential surface of the disc 39. Rotating balls 41 are movably embedded and installed at the bottoms of the two fixed blocks 40. The upper parts of the two connecting curved rods 37 are fixedly connected to the surfaces of the two rotating balls 41 respectively.

[0041] A second worm gear 42 is fixedly installed on the lower part of the adjusting shaft 38. A second worm 43 meshed with the second worm gear 42 is rotatably installed inside the inverted convex circular inner cavity 35 through a bearing. A circular concave opening 44 is opened on the circumferential surface of the placement round table 4. One end of the second worm 43 extends into the circular concave opening 44 and is fixedly installed with a runner 45, so as to be able to perform centering clamping and fixing on the flange body 7 inside the placement groove 5; A plurality of balls in rolling contact with the circumferential surface of the placement round table 4 are annularly and equidistantly installed on the upper part of the circular groove 2, so that the placement round table 4 can rotate stably and effectively;

[0042] Specifically, place the flange body 7 inside the placement groove 5 between the two arc-shaped clamping plates 32. Then, rotate the second worm 43 through the runner 45. The rotation of the second worm 43 will drive the second worm gear 42 to drive the adjustment shaft 38 to rotate. The rotation of the adjustment shaft 38 will drive the disc 39 and the two fixed blocks 40 to rotate. The two fixed blocks 40 will pull the two link rods 36 to move relatively through the rotatable balls 41 embedded movably and the two rotatable connecting curved rods 37. The two link rods 36 moving relatively will drive the two arc-shaped clamping plates 32 to move towards the flange body 7 through the two moving blocks 34 and the two moving rods 31. Finally, the flange body 7 is clamped and fixed by the two arc-shaped clamping plates 32 to maintain the stability of drilling.

[0043] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A punching device for machining flange holes, comprising a base (1), characterized in that: A circular groove (2) is formed at the top of the base (1). A rotating shaft (3) is rotatably installed at the middle of the bottom of the circular groove (2) through a bearing. A placing frustum (4) is fixedly installed at the top of the rotating shaft (3). A placing groove (5) is formed at the top of the placing frustum (4). A circular ring groove (6) facilitating hole punching is formed at the bottom of the placing groove (5). A flange body (7) is placed inside the placing groove (5). The hole punching position of the flange body (7) is above the circular ring groove (6). A transmission shaft (8) for driving the rotating shaft (3) is rotatably installed inside the circular groove (2). An inverted L-shaped mounting plate (9) is fixedly installed at the top of the base (1). Two inverted L-shaped sliding rods (10) are fixedly installed on the inner side of the inverted L-shaped mounting plate (9). A sliding plate (11) is slidably installed between the surfaces of the two inverted L-shaped sliding rods (10). An electric telescopic cylinder (12) is installed at the top of the inner side of the inverted L-shaped mounting plate (9). The telescopic end of the electric telescopic cylinder (12) is fixedly connected to the top of the sliding plate (11). An electric drilling machine (13) located above the circular ring groove (6) is installed on one side of the sliding plate (11). A transmission vertical plate (14) for driving one end of the transmission shaft (8) is fixedly installed at the bottom of the sliding plate (11).

2. The punching device for machining flange holes according to claim 1, wherein: A first worm gear (15) is fixedly installed at the lower part of the rotating shaft (3). A first worm meshing with the first worm gear (15) is fixedly installed on one side of the transmission shaft (8). A ratchet wheel (16) is fixedly installed at the middle of the transmission shaft (8). A pawl (17) connected to the ratchet wheel (16) is rotatably connected inside the circular groove (2) through a movable shaft. A first spring (18) is fixedly connected between the upper part of the pawl (17) and the upper part of the circular groove (2).

3. The punching device for flange hole machining according to claim 2, characterized in that: A vertical groove (19) is formed at the top of the base (1). One end of the transmission shaft (8) penetrates and extends into the interior of the vertical groove (19) and is connected with a one-way transmission member (20). The lower part of the transmission vertical plate (14) extends into the interior of the vertical groove (19) and is in sliding contact with one side of the vertical groove (19). At the same time, a toothed plate (21) connected with the one-way transmission member (20) is fixedly installed on one side of the lower part of the transmission vertical plate (14).

4. A punching device for machining flange holes according to claim 3, characterized in that: The one-way transmission member (20) includes a circular block (22) fixedly installed at one end of the transmission shaft (8). Two sleeves (23) are symmetrically and fixedly installed on the circumferential surface of the circular block (22). An external gear ring (24) located between the two sleeves (23) is movably sleeved on the circumferential surface of the circular block (22). The toothed plate (21) is meshed with the external gear ring (24).

5. A punching device for machining flange holes according to claim 5, characterized in that: A number of right-angled triangular grooves (25) are annularly and equidistantly formed on the inner circumferential surface of the external gear ring (24). Three inverted T-shaped mounting grooves (26) are annularly and equidistantly formed on the circumferential surface of the circular block (22). Sliders (27) are slidably installed in the middle of the inverted T-shaped mounting grooves (26). Second springs (28) are fixedly connected between one side of each slider (27) and the interior of the corresponding inverted T-shaped mounting groove (26). Right-angled triangular plugs (29) movably inserted into the right-angled triangular grooves (25) are fixedly installed on the other side of each slider (27).

6. The punching device for processing flange holes according to claim 1, characterized in that: At the edges of the top of the placing frustum (4), two notch grooves (30) are symmetrically formed. A moving rod (31) is movably inserted through each of the two notch grooves (30) and the interior of the placing groove (5). At the ends of the two moving rods (31) inside the placing groove (5), arc-shaped clamping plates (32) for clamping and fixing the circumferential surface of the flange body (7) are fixedly installed. At the bottom of each of the two notch grooves (30), a vertical inner groove (33) is formed. A moving block (34) is slidably installed in each of the two vertical inner grooves (33). The tops of the two moving blocks (34) are fixedly connected to the two moving rods (31) respectively.

7. A drilling device for machining flange holes according to claim 6, characterized in that: In the middle of the placing frustum (4), an inverted convex circular inner cavity (35) is formed. A linkage rod (36) is movably inserted through the lower part of each of the two vertical inner grooves (33) and the inverted convex circular inner cavity (35). The opposite ends of the two linkage rods (36) are fixedly connected to the lower parts of the two moving blocks (34) respectively. At the upper parts of the ends of the two linkage rods (36) inside the inverted convex circular inner cavity (35), connecting curved rods (37) are rotatably connected through movable shafts. An adjusting shaft (38) is rotatably installed in the inverted convex circular inner cavity (35) through a bearing. A disc (39) is fixedly installed on the upper part of the adjusting shaft (38). Fixed blocks (40) are fixedly installed on the circumferential surface of the disc (39). Rotating balls (41) are movably embedded at the bottoms of the two fixed blocks (40). The upper parts of the two connecting curved rods (37) are fixedly connected to the surfaces of the two rotating balls (41) respectively.

8. A drilling device for processing flange holes according to claim 7, characterized in that: A second worm gear (42) is fixedly installed on the lower part of the adjusting shaft (38). A second worm (43) meshed with the second worm gear (42) is rotatably installed in the inverted convex circular inner cavity (35) through a bearing. A circular notch (44) is formed on the circumferential surface of the placing frustum (4). One end of the second worm (43) extends into the circular notch (44) and a runner (45) is fixedly installed.

9. A punching device for machining flange holes according to claim 7, characterized in that: At the upper part of the circular groove (2), balls in rolling contact with the circumferential surface of the placing frustum (4) are annularly and equidistantly installed.

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